JP2008194256A5 - - Google Patents

Description

Drum washing machine

  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 picking up, dropping and washing is weak, and the inclined rotating drum is particularly weak with the help of the tendency of the laundry to collect at a low position even in the direction of the rotation axis (see, for example, Patent Document 1). In Patent Document 1, as a technique for solving the problem, the rotating drum is rotated at a first predetermined time for a first predetermined time at which the laundry lifted by the rotation of the rotating drum exhibits a behavior of dropping from a height position where its own weight prevails. After driving, the rotation driving of the rotating drum is stopped for a predetermined time, so that the position of the laundry to be gathered at a low position is changed, and such rotation driving is also performed. As shown in FIG. 9 (a) after the dehydration process, twisting and entanglement are shown in FIG. 9 (b) after the dehydration process. Technology that can reduce the work force when restraining and taking out the laundry, and when the diameter of the rotating drum is 500 ± 50 mm, the first predetermined rotation speed is 30 ± 5 rpm, and the normal arrangement in the horizontal arrangement A technique is disclosed in which the washing effect is enhanced by dropping after the laundry is sufficiently lifted at a speed higher than the speed. 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, there is only a category in which the lifted laundry is allowed to fall naturally, so depending on the type of laundry, the lift position Insufficient squeezing and lack of scouring 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 between them, the entanglement is eliminated to the extent shown in FIG. 9B, but the twist is still not sufficiently suppressed, and it remains stuck to the inner surface of the rotating drum after washing. The removal work from the other direction is necessary to take out the laundry, and the work is troublesome. Also, since the wrinkles of the laundry are not eliminated, the work of removing the wrinkles after washing also takes time.

  An object of the present invention is to provide a drum-type washing machine that greatly improves the occurrence of entanglement and twisting and that hardly raises wrinkles while increasing the function of mechanical force without difficulty.

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 perform each step of washing, rinsing, dehydrating, etc.
The controller is configured to rotate the laundry by centrifugal force due to the rapid arc rotation of the rotating drum by alternately repeating the rapid driving and rapid braking of the motor in at least one of a washing process and a rinsing process. Affixing to the drum inner surface and lifting the upper part of the laundry from the lowest position of the rotating drum to a position of more than 90 degrees and less than 180 degrees , and then peeling the laundry from the inner surface of the rotating drum by its inertia and its own weight One feature is that forward / reverse arc rotation control of the rotating drum is performed such that the operation of dropping the lower range of the rotating drum to the side opposite to the lifting side is repeated alternately forward and backward .

According to such a feature, to be lifted up to less than 180 degrees beyond the maximum 90 degrees laundry by sudden pivot rotation of less than 180 degrees than 90 degrees of the rotary drum, the last point of lifting of laundry or A sudden braking condition occurs in the vicinity, and the laundry can be peeled off from the rotating drum by its inertia and its own weight, and can be dropped to the left and right sides of the rotating drum by its own weight, thus preventing the laundry from getting tangled. it enhances the action, Ru can exert a mechanical force.

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 the driving load from time to time, the lifting and peeling behavior with respect to the laundry can be obtained as set.

In addition, the control device is characterized by changing the driving of the rotating drum according to the elapsed time or the amount of laundry, thereby responding to a change in washing conditions due to the progress of washing or a difference in driving load due to the amount of laundry. It is possible to drive a rotating drum that is optimal for laundry.

Furthermore, the control device, the stop or reversal for forward and reverse switching of the rotational direction of the rotary drum, by the laundry stuck to the drum inner surface and performing until the falling laundry Since the falling position of the laundry has moved from the lifting side in the arc rotation direction to the opposite side of the left and right sides, the lifting position can be lifted by the reversed arc rotation. Alternating replacement can be achieved more reliably, further increasing the laundry unwinding action and exerting the mechanical force more evenly.

According to the present invention, in at least one of the washing step and the rinsing step, the motor is suddenly driven and braked repeatedly alternately in the forward and reverse directions so that the laundry is brought into contact with the inner surface of the rotating drum by centrifugal force due to the sudden arc rotation of the rotating drum. The upper part of the laundry is lifted from the lowest position of the rotating drum to more than 90 degrees and less than 180 degrees, and then the laundry is peeled off from the inner surface of the rotating drum by its inertia and its own weight, and the lower range of the rotating drum By controlling forward and reverse arc rotation of the rotating drum, the operation of dropping it to the opposite side of the lifting side of the garment is performed alternately and forwardly and reversely , the laundry unraveling action is enhanced and the twisting and rotating drum as well as the entanglement are improved. The sticking to the inner surface is prevented, the laundry can be taken out easily, and wrinkles on the laundry can be greatly relieved. 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, the function of each step performed by the washing machine including the washing effect can be enhanced .

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) The process schematic diagram of the forward / reverse arc rotation drive mode in the drum type washing machine of FIG. 1, (b) The schematic diagram for description which shows the right-and-left interchange of the lifting position and dropping position of the laundry. FIG. 3 is an analysis diagram of rotational characteristics with respect to the sticking and peeling of the laundry on the inner surface of the rotating drum for ideally realizing the forward and reverse arc rotation driving mode in the drum type washing machine of FIG. 1. It is a graph which shows one example of the combination pattern of the normal / reverse continuous rotation drive mode and the normal / reverse arc rotation drive mode in the drum type washing machine of FIG. It is a graph which shows another example of the combination pattern of the normal / reverse continuous rotation drive mode and the normal / reverse arc rotation drive mode in the drum type washing machine of FIG. FIG. 8 is a copy diagram showing two state examples of the laundry after the forward / reverse arc rotation drive mode in the embodiment shown in FIGS. It is a copy figure which shows two example states of the laundry after the spin-drying | dehydration process in the drum type washing machine which concerns on a prior art.

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

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

  The rotating drum 4 is installed with the motor 5 on the water tank 2 directly connected to the rotating shaft 4a, and along with the water tank 2, the rotating shaft direction is inclined from the horizontal direction to the angle θ = 20 ± 10 degrees from the opening side to the bottom side. However, compared with the case of installation in the horizontal direction, even if the rotary drum 4 is installed at the same height, the laundry can be easily put in and out without taking an unreasonable posture in which the opening is inclined upward. In particular, from the experience of the present inventors, by setting the inclination angle θ to 20 ± 10 degrees, even if there is a difference in height from a child (excluding infants) to an adult, even a wheelchair user, laundry It is possible to obtain a state in which the operation of loading and unloading is most easily performed. Further, there is an advantage that a deep water storage state can be obtained even with a small amount of water because water supplied into the rotating drum 4 is accumulated on the back side. However, as described above, 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 rotation of the rotary drum 4 at a rapid speed exceeding 90 degrees and less than 180 degrees And an arc rotation drive mode for sudden braking and a continuous rotation drive mode for continuous rotation of the rotating drum. Therefore, both of these drive modes can be executed as required.

  According to this, the laundry can be lifted up to more than 90 degrees and less than 180 degrees by arc rotation and rapid braking of the rotating drum 4 at a rapid speed exceeding 90 degrees and less than 180 degrees, and lifting the laundry It is possible to reliably achieve that the laundry is peeled off from the inner surface of the rotating drum 4 due to its inertia and its own weight and dropped due to its own weight, so that the laundry is prevented from getting tangled. Therefore, the washing performance can be enhanced and the mechanical force can be exerted on the laundry. 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 falling position of the object can be switched alternately left and right in each arc rotation drive, it is possible to further improve the solving action while preventing the laundry from getting 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, the arc rotation drive mode alone reduces tangling, twisting, wrinkles, etc. of the laundry, but the vertical position of the laundry is difficult to change and washing unevenness is likely to occur, but the continuous rotation drive mode is also used. By doing so, it is possible to realize a change in the position of the laundry in the vertical direction, that is, to reduce tangling, twisting and wrinkle of the laundry in the continuous rotation drive mode and to the machine for the laundry in the arc rotation drive mode By reducing the imbalance of force application, the two types of behavior that are different in washing and rinsing laundry depending on both modes, specifically, tangling, twisting, and wrinkling of the laundry are reduced depending on the arc rotation drive mode. In addition, a firm hand-washing behavior while giving a uniform washing behavior that reduces the unevenness by moving the laundry largely and continuously depending on the continuous rotation drive mode. That.

  In addition, the arc rotation drive mode performs rapid rotation and braking, so the drive load on the motor is large, but the drive load on the motor is reduced by using the continuous rotation drive mode with a small drive load on the motor. can do.

  In particular, with respect to the arc rotation mode, particularly 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. The laundry 21 shown in FIG. 4 is stuck to the inner surface of the rotating drum 4 by the sudden forward arc rotation and the sudden reverse arc rotation of the rotating drum 4 exceeding 90 degrees and less than 180 degrees. 4 and 6 are lifted from the broken line position to the solid line position by exceeding 90 degrees and less than 180 degrees at the maximum. 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 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 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 switched 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. Can be greatly relieved. 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 interchanges of the laundry lifting position and the falling position due to falling to the opposite side of the lifting side.

  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 is more than 90 degrees and less than 180 degrees. Even under conditions that satisfy the sudden acceleration that guarantees sticking, the direction of arc rotation is suddenly reversed in the forward and reverse directions, and it is reliably peeled off by the inertia and dead weight during sudden acceleration at the final stage of arc rotation of the laundry. It is made to fall to the opposite side and the loss of mechanical force provision with respect to the laundry 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.

  In view of the behavior of the laundry 21 as described above, the forward / reverse arc rotation drive mode of the present embodiment also causes the laundry 21 to move to the inner surface of the rotary drum 4 by the centrifugal force due to the sudden arc rotation of the rotary drum 4. After being lifted upwards, the rotating drum 4 is suddenly braked so that the lifted laundry 21 is peeled off from the inner surface of the rotating drum 4 by its inertia and its own weight and dropped by its own weight. Can be seen as something that repeats.

  More preferably, the laundry 21 is attached to the inner surface of the rotating drum 4 by the centrifugal force caused by the rapid arc rotation of the rotating drum 4 and lifted up to the upper range of the rotating drum 4, and then the rotating drum 4 is suddenly braked. The driving of causing the laundry 21 to peel off from the inner surface of the rotating drum 4 due to its inertia and its own weight and dropping 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 may be repeated alternately forward and reverse. Become.

  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 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. The rotation speed of about 50 rpm in the vicinity indicated by the circled symbol 2 is reached after the stop indicated by the circled symbol 1 in FIG. Further, the rotation angle 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, The solid solid line described 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 corresponds to the thick solid line described 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 rotation inertia and its own weight acting on the laundry 21 by braking that stops at the rotation angle of about 140 degrees reaching the circled sign 3 from the rotation angle of about 125 degrees. It can be seen that it can be 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. Also, 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 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 trying to continue the rotation at 40 rpm or higher due to the deceleration state from the arc rotation performed at 40 rpm or higher. 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, specifically, on the diameter line of the rotating drum 4, and the subsequent arc rotation is set to 110 degrees near 140 degrees to 30 degrees, and either left or right of the rotating drum. Laundry close to the side, specifically dropped almost 30 degrees 1 is lifted to the upper part on the same side of the rotating drum 4, specifically, approximately 120 degrees, and the behavior of dropping it to the opposite left and right sides of the rotating drum 4 is approximately symmetrical and is the maximum corresponding to the diameter of the rotating drum 4. The fall distance can be obtained reliably. As a result, the effect of unraveling and tapping 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, 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, the laundry 21 is dropped at the same position indicated by X ′ and X ″ of the rotary drum 4 indicated by the circled symbols 3 and 5, and the laundry 21 is stuck at the same rotation angle of 90 degrees from the time of the drop. After reaching the area, the positions of the circled signs 4 and 6 are reached at almost the same rotation angle, and the laundry 21 is peeled off from the rotating drum 4 by sudden braking. The required time from the position 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 6 to the peeling position indicated by the circled symbol 4 is about 0.8 seconds. And both are equal.

  Such a forward / reverse arc rotation drive mode is performed in at least one of the washing process and the rinsing process at least partially or entirely instead of continuous rotation or normal / reverse continuous rotation in the process, thereby lifting the laundry 21. By repeatedly giving the falling behavior forward and backward, it is possible to enhance the unwinding and tapping action of the laundry 21 while exerting a mechanical action on the laundry 21, and the laundry 21 after washing is shown in FIG. As shown in b), the entanglement and twist that have been seen in the past 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 few wrinkles will be obtained, and the laundry 21 will be released from sticking to the inner surface of the rotating drum 4 at the time of dehydration. As in the example shown in the state after the drying process in which the forward / reverse arc rotation drive mode is performed in b), it is easy to take out, and the post-processing is easy, and the labor is not much troublesome. In particular, when it is carried out in the drying step after dehydration, the dried high-temperature air is easy to pass through and the ventilation is evenly distributed to every corner.

  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 rotary drum 4 according to the elapsed time or the amount of the laundry 21, the laundry 21 corresponding to a change in conditions such as washing due to the progress of washing or the like or a difference in driving load depending on the amount of the laundry 21 is obtained. The rotation drum 4 can be optimally driven, and the amount of laundry 21 and the driving load may be determined by various known detection methods.

  On the other hand, as described above, the drive load is high in the arc rotation drive mode or the forward / reverse arc rotation drive mode, and the circumferential position of the rotary shaft 4a and the bearing 10 is hardly changed and is always located below the same. As a result, there is a problem that a part of the rotating shaft 4a and the bearing 10 shown in FIG. However, while the drive load in the arc rotation drive mode or forward / reverse arc rotation drive mode is large, the arc rotation drive mode or forward / reverse continuous rotation drive mode with a small drive load is executed in a timely manner in the entire washing process. The load can be reduced, and the circumferential position of the rotating shaft 4a and the bearing 10 can be changed to prevent the bearing 10 of the rotating shaft 4a from being partially reduced or causing an early play, Moreover, the tangling, twisting, and wrinkling of the laundry 21 in the forward / reverse continuous rotation drive mode can be solved in the forward / reverse arc rotation drive mode.

  Conventionally, the forward / reverse continuous rotation drive mode is repeated about 40 rpm in about forward / reverse intervals, but can be executed in combination with the forward / reverse arc rotation drive mode without changing this or in various ways. More specifically, the forward / reverse arc rotation drive mode D as shown in FIG. 6 is an α pattern executed alternately with the forward / reverse continuous rotation drive mode T, or the forward / reverse continuous rotation drive mode T as shown in FIG. It can be executed between forward and reverse switching, and the number of repetitions of forward / reverse arc rotation in forward / reverse arc rotation drive mode D can be varied, or the start direction can be implemented as a β, γ pattern or the like. Accordingly, the laundry 21 in the forward / reverse continuous rotation drive mode D is reduced while the mechanical load is reduced by using the forward / reverse continuous rotation drive mode T having a lower drive load in combination with the forward / reverse arc rotation drive mode D having a higher drive load. Thus, the mechanical force imbalance on the laundry 21 can be corrected according to the execution ratio of the forward / reverse arc rotation drive mode D. In particular, in the washing process, the α pattern, the β pattern, and the γ pattern are sequentially executed to move to the drying process, but the rinsing process is not included, or the same time distribution is performed, for example, every 15 minutes. By sequentially increasing the number of repetitions of forward / reverse arc rotation drive in the forward / reverse arc rotation drive mode D, the number of repetitions of forward / reverse arc rotation is increased in three stages from the start to the end of the washing process. With the increase in penetration of the surface-active action by the detergent and the detergent, the action of tapping or / and rinsing by dropping of the laundry 21 and wrinkle-stretching are enhanced, and more effective and short-time washing or / Then, rinsing is achieved and the process proceeds to the drying process. As described above, the drying process is efficiently performed, and the laundry 21 with less wrinkles can be obtained. In addition, by setting a rotation pause time (pause period K) between the forward / reverse continuous rotation drive mode T and the forward / reverse arc rotation drive mode D, the rotating drum 4 in the different drive modes T and D before and after is set. Then, the behavior of the laundry 21 is temporarily settled, and the behavior of the next drive mode can be obtained easily and early without being affected by the behavior of the rotary drum 4 and the laundry 21 in the previous drive mode, and the drive load is reduced. A pause time of about 1 second is sufficient.

  However, the present invention is not limited to such a combination pattern of both T and D modes, and in addition to or in addition to such a combination pattern of both T and D modes, in order to enhance the wettability of the laundry 21 at the start of washing. It is preferable to increase the number of times of forward / reverse arc rotation drive repetition in the forward / reverse arc rotation drive mode D, for example, for a predetermined time from the start of the washing process, and to drop rice grains, sheet solid components, etc. It is preferable to increase the execution ratio of the forward / reverse continuous rotation drive mode T so that the laundry 21 is vigorously exposed to the washing water flow. Here, the combination pattern of the forward / reverse continuous rotation drive mode T and the forward / reverse arc rotation drive mode D includes the type of laundry 21 and the purpose of washing, including the execution time at each execution timing or the difference in rotational speed. It is preferable that the user can perform washing according to the difference between them, and various patterns are automatically executed in the process according to the selection input from the operation panel 14 according to the input setting from the operation panel 14. Can do.

  Further, particularly in the washing process and the rinsing process, the laundry 21 becomes heavy and contains water, and the driving load in the forward / reverse arc rotation drive mode D is particularly high. Therefore, in at least one of the washing process and the rinsing process, the forward / reverse continuous rotation is performed. By changing the execution ratio between the drive mode T and the forward / reverse arc rotation drive mode D, it is preferable to change the execution ratio with the forward / reverse continuous rotation drive mode T depending on the purpose, degree, and load of washing. For example, in terms of washing function, when the load of the motor 5 is small, such as the amount of the laundry 21 is small, the forward / reverse arc rotation drive mode D is 3 and the forward / reverse continuous rotation drive mode T is 1 On the other hand, when the load of the motor 5 is high, such as when the amount of the laundry 21 is large, the forward / reverse arc rotation drive mode D is preferably 1 and the forward / reverse continuous rotation drive mode T is 3. In addition, the execution ratio is not limited to the washing process, and the execution ratio of the forward / reverse arc rotation drive mode D to the forward / reverse continuous rotation drive mode T is reduced or increased according to the amount of laundry. Thus, the washing characteristics of the forward / reverse arc rotation driving mode D can be utilized to the maximum without excessive or insufficient driving load.

  It is practically used in a drum-type washing machine with a rotating drum installed in a horizontal direction or at an angle, and while preventing tangling and twisting of the laundry, it improves the washing effect mechanically, and also prevents wrinkles of the laundry. be able to.

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 (4)

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.
Said controller, in at least one of washing process and rinsing process, by repeating rapid driving of the motor, the sudden braking in forward and reverse alternately, the rotation of the laundry by centrifugal force due to sudden pivot rotation of said rotary drum after lifting with Keru paste to the drum inner surface to the upper portion of the laundry from the lowest position of the rotary drum to a position of less than 90 degrees greater than 180 degrees, the front Kiarai濯物rotary drum inner surface by its inertia and own weight the operation of conjunction be peeled dropped on the side opposite the lifting side of the lower range of the rotary drum from the drum type and performing forward and reverse pivot rotation control of the rotary drum, such as repeated in normal and reverse alternate washing Machine. Controller by the drive of the motor according to the first drum driving instructions, when more than step-out limit of the motor, claims and drives the motor by a second drum drive instruction not exceed the upper limit load Item 2. The drum type washing machine according to Item 1 . The drum type washing machine according to claim 1 or 2 , wherein the control device changes the driving of the rotating drum according to the elapsed time or the amount of laundry. Controller, stop or reverse for forward and reverse switching of the rotational direction of the rotary drum, any one of claims 1 to 3, laundry stuck to the drum inner surface and performing until the fall 2. A drum type washing machine according to item 1 .