JP4100576B1 - Drum washing machine - Google Patents

Abstract

An object of the present invention is to greatly improve the occurrence of entanglement and torsion and enhance the function of mechanical force so that wrinkles are hardly generated.
A rotating drum 4 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 opening front side toward the back side as the bottom. Under the above conditions, the above object is achieved by the forward / reverse arc rotation drive mode in which the sudden forward arc rotation and the sudden reverse arc rotation of 90 to less than 180 degrees of the rotating drum are alternately repeated.
[Selection] Figure 4

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 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. 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, when washing is performed with a rotating drum arranged so that the rotation axis direction is horizontal or inclined downward from the horizontal direction from the opening side to the bottom side, it is easy to put in and out the laundry, but the laundry is sufficient. It has already been found that the action of lifting and dropping and washing and washing is weak, and the inclined rotating drum 4 is particularly weak with the help of the tendency of the laundry to collect at a low position in the rotational axis direction (see, for example, Patent Document 1). As a technique for solving this, in Patent Document 1, the laundry is lifted by the rotation of the rotating drum, and the rotating drum is moved to the first predetermined time at a first predetermined rotation speed that shows a behavior in which the laundry falls from a height position where its own weight prevails. A technique for changing the position of the laundry to be gathered at a low position by stopping the rotation drive of the rotary drum for a predetermined time after the rotation drive, and such a rotation drive Twisting and entangled states shown in FIG. 7 (b) are shown in FIG. 7 (a) when twisting occurs in the laundry alternately in the forward and reverse directions. As shown in Fig. 1, the technology that can reduce the work force when taking out the laundry somewhat, and when the diameter of the rotating drum is 500 ± 50mm, the first predetermined rotation speed is set to 30 ± 5rpm and horizontally arranged In this case, a technique for increasing the washing effect by dropping after the laundry is sufficiently lifted by increasing the normal speed is disclosed. The first predetermined time is exemplified as 13 seconds, 4 minutes, etc., and is a continuous rotation from the relationship with the rotation speed.
JP 2005-124664 A

  However, although the technique described in Patent Document 1 makes the rotational speed of the rotating drum higher than that in the case of horizontal installation, the lifted laundry is naturally moved from a height position where its own weight is superior to the centrifugal force of the rotating drum. Since there is only the category to drop, depending on the type of laundry, there may be a lack of lifting position and lack of tapping effect. In addition, although the forward / reverse rotation is alternately performed, the forward continuous rotation and the reverse continuous rotation are alternately performed, and the laundry is twisted or entangled during the continuous rotation. Even if there is a stop period, the entanglement to the extent shown in FIG. 7 (b) after dehydration can be resolved, but the twist is not yet sufficiently suppressed, and it remains stuck to the inner surface of the rotating drum after washing. It takes a lot of time to remove the laundry from the other direction, and the work is still troublesome. It takes.

  An object of the present invention is to provide a drum type washing machine that greatly improves the occurrence of entanglement and twisting and enhances the action of mechanical force, and is less likely to cause wrinkles.

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. The control device drives the motor in at least one of a washing process and a rinsing process, and the laundry is lifted by the rotation of the rotating drum at a rotational speed indicating a behavior in which the laundry falls from a height where its own weight is superior. A continuous rotation drive mode in which the rotating drum is continuously rotated, or a forward / reverse continuous rotation drive mode in which continuous rotation of the rotating drum in the continuous rotation drive mode is repeated forward and backward alternately. So as to perform a de, in the continuous rotation drive mode or some alternative to the normal and reverse continuous rotation drive mode, by Kyuko rotating the rotary drum by causing rapid drive the motor, rapid arc of said rotary drum The laundry is attached to the inner surface of the rotating drum by centrifugal force due to rotation and lifted from the lowest position of the rotating drum to a position exceeding 90 degrees and less than 180 degrees, and then suddenly braking the rotation of the motor. A forward / reverse arc rotation drive mode in which the laundry is peeled off from the inner surface of the rotating drum due to its inertia and its own weight and is dropped alternately on the side opposite to the lifting side of the lower range of the rotating drum. It is set to one, characterized in that run.

According to such a feature, depending on the continuous rotation drive mode or the forward / reverse continuous rotation drive mode, the laundry can be washed continuously without moving uniformly, and the forward / reverse arc rotation drive mode can be rotated. The laundry is lifted from the lowest position of the rotating drum to more than 90 degrees and less than 180 degrees by the sudden arc rotation of the drum, and the braking state is caused by the sudden braking at the final stage of lifting the laundry, and the laundry is It can be reliably peeled off from the inner surface of the rotating drum due to inertia and its own weight and dropped to the side opposite to the lifting side of the lower part of the rotating drum. Can be switched alternately on the left and right in each arc rotation drive, so that it is possible to improve the action while preventing the laundry from getting tangled, and the mechanical force It is possible to increase the number of times on the laundry can be enhanced cleaning performance.

  In the above invention, the control device is further 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 40 rpm or more. The laundry can be reliably lifted to the arc rotation position and dropped to the opposite side.

  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 performs stop or reversal for forward / reverse switching of the rotation direction of the rotating drum until the laundry stuck to the inner surface of the rotating drum falls, whereby the position of the laundry falling is determined. Since the fall position moved from the lifting side in the arc rotation direction to the opposite side of the left side can be secured and lifted by reversed arc rotation, the laundry lifting position and the falling position can be switched alternately on the left and right in each arc rotation drive. It can be achieved more reliably to further enhance the unwinding action of the laundry and further exert mechanical force on the laundry.

  The control device performs the arc rotation of the rotating drum at the start of 120 degrees or more and less than 180 degrees at the start in the forward / reverse arc rotation drive mode, and performs the subsequent arc rotation at around 120 degrees, so that the initial Ensure that the laundry that is stationary in the lower part of the rotating drum during arc rotation is lifted to the upper part of the left and right initial arc rotating side by the arc rotation of 120 to 180 degrees and dropped to the opposite side of the rotating drum. The subsequent arc rotation is 120 degrees, and the laundry that has fallen toward the left and right sides of the rotating drum is lifted to the upper part on the same side of the rotating drum, and the behavior of dropping to the opposite side of the rotating drum is reliably achieved. Can do.

According to the present invention, in at least one of the washing process and the rinsing process, the motor is driven, and the laundry is lifted by the rotation of the rotating drum. Continuous rotation drive mode for continuous rotation or continuous rotation drive mode in which continuous rotation of the rotating drum in continuous rotation drive mode is repeated forward and reverse alternately is executed, instead of continuous rotation drive mode or forward and reverse continuous rotation drive mode. In some cases, the rotating drum is suddenly rotated by suddenly driving the motor, and the laundry is stuck to the inner surface of the rotating drum by centrifugal force due to the rapid arc rotation of the rotating drum, and the maximum is 90 from the lowest position of the rotating drum. After being lifted to a position exceeding 180 degrees and less than 180 degrees, the laundry is caused by its inertia and dead weight due to sudden braking of the rotation of the motor. The operation of rolling fall together peeled from the drum inner surface to the side lifting side opposite to the lower range of rotary drum, the forward and reverse pivot rotation drive mode for repeating forward and reverse alternately by executing, laundry greatly to continuous Gives a uniform washing behavior that moves evenly, and improves the unwinding of the laundry to prevent twisting and sticking to the inner surface of the rotating drum, making it easy to take out the laundry and causing wrinkles on the laundry Can be greatly eased. In addition, since the mechanical force can be exerted on the laundry and the number of times the laundry having a hitting action is increased, functions in each process performed by the washing machine including the washing effect can be realized.

  Hereinafter, a drum type washing machine according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6 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 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, the laundry tends to gather at a lower position in the rotation axis direction than in the case of installation in the horizontal direction.

  Including this tendency, in this embodiment, the rotation from the opening side to the bottom side is intended to greatly improve the occurrence of entanglement and torsion and increase the mechanical force to make it difficult for wrinkles to occur. Regarding drive control by the control board 9 for the bottomed cylindrical rotary drum 4 installed so that the axial direction is inclined downward from the horizontal direction, the arc of the rotary drum 4 at a rapid speed of more than 90 degrees and less than 180 degrees It is assumed that an arc rotation drive mode for performing rotation and rapid braking is provided. According to this, the laundry 21 can be lifted up to more than 90 degrees and less than 180 degrees by the arc rotation at a rapid speed exceeding 90 degrees and less than 180 degrees and sudden braking, and the laundry 21 Since the braking state is caused by the sudden braking at the final stage of the lifting of the laundry, the laundry 21 can be reliably peeled off from the inner surface of the rotating drum 4 by its inertia and its own weight and dropped by its own weight, so that the laundry 21 is entangled. It is possible to enhance the unraveling action while preventing the above-mentioned problem, and the mechanical force can be exerted on the laundry 21, so that the washing performance can be enhanced. Further, 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 reverse arc rotation in the reverse direction. Since the lifting position and the falling position of the object 21 can be switched alternately in the left and right directions in each arc rotation drive, the operation can be further improved while preventing the laundry 21 from getting tangled, and the number of times the mechanical force is exerted on the laundry 21 can be increased. Since it can increase, cleaning performance can be improved.

  With respect to the arc rotation mode and 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. By rotating the rotating drum 4 in an arc exceeding 90 degrees and less than 180 degrees, the laundry 21 shown in FIG. The maximum lift is 90 degrees and less than 180 degrees. In addition, this sudden arc rotation drive is alternately performed in the order of circled symbols 2, 4, 6, 4, 6,... Shown in FIG. As indicated by the circled symbols 3 and 5 shown in FIG. 4A, a braking state for reversal of rotation occurs at the final stage of lifting the laundry 21, and the laundry 21 is caused to rotate by the inertia and its own weight. It can be surely peeled off from the inner surface, and by its own weight, a parabola as shown by the arrow from the broken line position to the solid line position can be drawn and dropped to the side opposite to the lifting side. 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 by rotating the arc of the rotating drum 4 alternately in the forward and reverse directions, and the laundry 21 is lifted or decelerated or braked in the vicinity thereof. The laundry 21 is forcibly peeled off by its inertia and its own weight, and dropped by moving its weight to the opposite side of the left and right. The unwinding action of 21 can be enhanced to prevent twisting and sticking to the inner surface of the rotating drum 4 as well as entanglement, and the washing 21 can be easily taken out and the washing 21 can be greatly reduced from wrinkling. . In addition, since the mechanical force can be exerted on the laundry 21 and the number of drops of the laundry 21 having a hitting action is greatly increased, functions in each process performed by the washing machine including the washing effect can be realized.

  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. Rapid acceleration that causes the laundry 21 to adhere to the inner surface of the rotating drum 4 by about 90 degrees where the laundry 21 cannot follow the rotation of the rotating drum 4 due to the lifting of the rotating drum 4 from the lowest position and easily falls due to its own weight. Therefore, the laundry 21 does not slide to the predetermined lifting position, and therefore, the inertia corresponding to the rotational speed of the rotary drum 4 is given and reliably lifted, and the laundry is peeled off by the inertia and its own weight when changing to the braking state. The lifting position of the laundry 21 and the left / right switching of the dropping position due to the fall of the weight 21 on the side opposite to the lifting side can be achieved more reliably.

  Further, the forward / reverse switching of the rotating direction of the arc of the rotating drum 4 is performed by sandwiching a sudden braking operation when the arc rotation of the rotating drum 4 is more than 90 degrees and less than 180 degrees, thereby guaranteeing that the laundry 21 is stuck. Even under conditions that satisfy the sudden acceleration, the direction of arc rotation is suddenly reversed in the forward and reverse directions, and the laundry 21 is reliably peeled off by the inertia and dead weight at the time of sudden acceleration at the final stage of arc rotation, and the side opposite to the lifting side The mechanical force applied to the laundry 21 can be suppressed from being lost. 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.

  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 rotating drum 4 by centrifugal force due to the sudden arc rotation of the rotating drum 4. After affixing to the inner surface and lifting it upward, the drive of causing the laundry 21 to be peeled off from the inner surface of the rotating drum 4 by its inertia and dropping by its own weight by sudden braking of the rotating drum 4 alternately forward and reverse. It can be understood as having a repetitive forward and reverse arc rotation drive mode.

  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 sudden braking of the rotating drum 4 is performed. The forward / reverse arc rotation drive that repeats alternately the forward and reverse driving in which the laundry 21 is peeled off from the inner surface of the rotating drum 4 due to its inertia and dropped to the side opposite to the lifting side of the lower range of the rotating drum 4 due to its inertia and its own weight. It also has a mode.

  Also in these cases, it is preferable to repeat the forward arc rotation and the reverse arc rotation of the rotating drum 4 at less than 180 degrees for the reasons described above, and it is best to perform the rotation beyond 90 degrees.

Here, in the rotating drum 4 having a diameter of 500 ± 50 mm, when the gravity is disassembled and decomposed in the direction of the center and the tangential direction of the drum,
mrω ² = mg cos θ
Is calculated as 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 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 over 90 degrees of the rotating drum 4 and up to 180 degrees, but in this example, the rotation angle is around 125 degrees indicated by a circled symbol 2, Near this 125 degrees, the thick solid line described as “sticking level” intersects with the solid line of rotation of the rotating drum 4, and thereafter, the solid line of rotation of the rotating drum 4 corresponds to the thick solid line described as “sticking level”. Since it is on the lower side, the maximum rotation speed 45 rpm that is peeled off from the inner surface of the rotating drum 4 due to the rotation inertia and its own weight acting on the laundry 21 by braking that stops at a rotation angle of about 140 degrees reaching the circled symbol 3 from about 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. Effective by mode is obtained. Further, the laundry 21 is not peeled off in the forward / reverse arc rotation drive mode, for example, by braking performed in a range of a rotation angle of 125 degrees to 140 degrees as in the illustrated example. Specifically, the forced peeling force corresponding to the deceleration to less than 40 rpm due to the rotational inertia and the own weight 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 is performed on the laundry. 21 is dropped.

  Further, in the forward / reverse arc rotation drive mode, the initial arc rotation is performed in the vicinity of 140 degrees as shown by the circled reference numeral 2 in FIG. 4A, and the subsequent arcs shown in FIG. As shown by the solid line in FIG. 5, the rotation is performed in the range of around 140 degrees to 30 degrees, so that during initial arc rotation, the circled code 1 in FIG. As shown, 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 rotating side by arc rotation in the vicinity of 120 degrees and braked between 120 degrees and 140 degrees. It is ensured that it falls on the opposite side of the left and right sides, specifically, approximately on the diameter line of the rotating drum 4, and the subsequent arc rotation approaches 110 degrees from about 140 degrees to about 30 degrees and approaches the left and right sides of the rotating drum 4. Specifically, the laundry 21 dropped by about 30 degrees is rotated The upper part of the drum 4 is lifted to the upper part of the same side, specifically about 150 degrees and dropped to the opposite side of the rotating drum 4 in a symmetrical manner, and the maximum falling distance corresponding to the diameter of the rotating drum 4 is set. Can be achieved reliably. Thereby, the effect of unraveling and hitting the laundry 21 can be enhanced.

  In order to realize such a behavior of the laundry 21 with a good left / right balance, the laundry 21 attached to the inner surface of the rotating drum 4 is dropped when the rotating or rotating direction of the rotating drum 4 is stopped or reversed. It is preferable that the laundry 21 is lifted by the arc rotation in which the fall position of the laundry 21 is shifted from the lifting side in the arc rotation direction to the opposite side of the arc rotation and the reverse rotation is performed. The left and right alternating rotations at each lifting and falling position of the arc rotation drive can be achieved in a more balanced and reliable manner, further improving the unwinding action of the laundry 21 and further exerting mechanical force on the laundry. In addition, it is preferable that the laundry 21 is instantly peeled off from the lifting position, and braking is indispensable. However, such braking includes mechanical braking and electrical braking. There are more types of brakes that use proper braking, which does not incur mechanical complexity and has a maintenance-free merit.

  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 40 rpm, the laundry 21 is rotated by the rotating drum 4 in the rotational inertia acting on the laundry 21 by 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 rotary drum 4 is 90 degrees or less, the laundry 21 cannot be lifted, and when the rotation angle of the rotary drum 4 is 180 degrees or more, the laundry 21 is washed when the rotary 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 technique 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. In any of the arc rotations, the laundry 21 is dropped at substantially the same position indicated by X ′ and X ″ of the rotating drum 4 indicated by the circled signs 3 and 5, and the laundry is at the same rotational angle position 90 degrees from the time of the fall. After reaching the sticking area 21, the positions of the circled signs 4 and 6 are reached at substantially the same rotation angle, and the laundry 21 is peeled off from the rotating drum 4 by sudden braking. The required time from the peeling position indicated by 4 to the peeling position indicated by the circled symbol 6 is about 0.8 seconds, and the required time from the peeling position indicated by the circled symbol 5 to the peeling position indicated by the circled symbol 3 is 0. . About 8 seconds .

  Such a forward / reverse arc rotation drive mode exhibits a behavior in which the laundry lifted by at least the continuous rotation drive mode in the process or the rotation of the rotating drum falls from the height at which its own weight wins in the washing process and the rinsing process. By performing a part or the whole in place of the forward / reverse continuous rotation drive mode in which the continuous rotation of the rotating drum is alternately forward / reverse alternately at a rotational speed, the laundry 21 is repeatedly given a lifting / falling behavior in forward / reverse directions, While exerting a mechanical action on the laundry 21, it is possible to enhance the unwinding and tapping action of the laundry 21, thereby shortening the washing time, and the laundry 21 after the dehydration step is shown in FIGS. 7 (a) and 7 (b). The entanglement and twist seen in the prior art are greatly improved and easy to take out, and post-processing is easy. In addition, the finished product was not left too much, and the labor of removing the product was greatly eased.

  In addition, if it performs after a dehydration process, a hit | damage action will extend a wrinkle and the finish state with much less wrinkles will be obtained, and the laundry 21 will be open | released from sticking to the rotating drum 4 inner surface at the time of a dehydration, FIG. Since it is soft as in the example shown in b), it is easier to take out and the post-processing is easier, so that much effort is not required for scraping. In particular, when carried out in the drying step after dehydration, the wrinkle stretching by tapping is further promoted. Moreover, in contrast to the high drive load in the forward / reverse arc rotation drive mode, the mechanical load can be reduced by the amount of execution of the forward / reverse continuous rotation drive mode instead, and the laundry 21 contains water and the drive load increases. It is effective in the washing process and the rinsing process. In addition, depending on the two modes, two different behaviors for the laundry 21 that is being washed and rinsed, specifically, a firm hand-washing behavior depending on the forward / reverse arc rotation drive mode, and depending on the forward / reverse continuous rotation drive mode, Uniform washing behavior can be given in which the laundry is moved continuously and washed evenly.

  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.

  Further, by changing the driving of the rotating drum 4 according to the elapsed time or the amount of the laundry 21, the laundry 21 is optimal for the laundry 21 corresponding to the change in the washing condition due to the progress of the washing or the difference in the driving load due to the amount of the laundry 21. The rotary drum 4 can be driven, and the amount of the laundry 21 may be determined by various known detection methods.

  It is practically used in a drum-type washing machine in which a rotating drum is installed in a horizontal direction or inclined, and the washing effect is enhanced while preventing the tangling and twisting of the laundry, and the wrinkle of the laundry can be prevented.

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 schematic diagram of forward / reverse arc rotation drive mode in drum-type washing machine of FIG. 1, (b) Explanatory view showing left and right interchange of laundry lifting position and fall position in forward / reverse arc rotation drive mode It is a schematic diagram. FIG. 2 is a rotation characteristic diagram with respect to 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. FIG. 6 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 (5)

A rotating drum that is formed in a bottomed cylinder and is driven to rotate by a motor is installed in the aquarium so that the direction of the rotation axis is horizontal or inclined downward from the horizontal direction from the front side that opens to the back side that is the bottom. And a drum-type washing machine having a control device for controlling the motor and the like to execute each step of washing, rinsing, dehydrating, etc.
The control device drives the motor in at least one of a washing process and a rinsing process, and the laundry is lifted by the rotation of the rotating drum at a rotational speed indicating a behavior in which the laundry falls from a height where its own weight is superior. A continuous rotation drive mode in which the rotating drum is continuously rotated or a forward / reverse continuous rotation drive mode in which continuous rotation of the rotating drum in the continuous rotation drive mode is repeated alternately forward and reverse is executed. In a part of the continuous rotation drive mode, the rotating drum is suddenly rotated by abruptly driving the motor, and the laundry is stuck to the inner surface of the rotating drum by centrifugal force due to the rapid arc rotation of the rotating drum. And lifted from the lowest position of the rotating drum to a position of more than 90 degrees and less than 180 degrees. When the laundry is suddenly braked, the laundry is peeled off from the inner surface of the rotating drum due to its inertia and its own weight, and the operation of dropping to the side opposite to the lifting side of the lower range of the rotating drum is performed forward and backward alternately. drum type washing machine, which comprises running the reverse pivot rotation drive mode.   The drum type washing machine according to claim 1, wherein the control device sets the maximum rotation speed of the rotating drum during forward and reverse arc rotation in the forward and reverse arc rotation drive mode to 40 rpm or more.   The control device drives the motor according to 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. Item 3. The drum type washing machine according to Item 1 or 2.   4. The control device according to claim 1, wherein the control device performs stop or reversal for forward / reverse switching of the rotation direction of the rotating drum until the laundry attached to the inner surface of the rotating drum falls. 2. A drum type washing machine according to item 1.   The control device performs arc rotation of the rotating drum at the start in the forward / reverse arc rotation drive mode at 120 degrees or more and less than 180 degrees, and performs arc rotation after that at around 120 degrees. The drum type washing machine according to any one of 4.

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