JP2009077747A - Drum type washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the load to a motor and to improve the safety of the motor in the washing process in which the agitating process is performed with driving the motor at a high speed of agitation start. <P>SOLUTION: In a second agitation process, a rotating drum 24 is suddenly arcuately rotated, the laundry 21 is stuck to the inside of the rotating drum 24 by the centrifugal force caused by the sudden arcuate rotation of the rotating drum 24 and is lifted from the lowermost position of the rotating drum 24 up to a position at over 90° and less than 180°, then is detached from the inside of the rotating drum 24 by its inertia and its own weight by a sudden braking of the rotation of a motor 28 and falls down to the side opposite to the lifting side in a lower area of the rotating drum 24 and the operations are repeatedly alternated forward and reversely. When agitation start can not be performed in the second agitation process, the process is not performed and the motor 28 is degaussed not to repeat the state in which the agitation start can not be performed. In this manner, the load to the motor 28 can be reduced while maintaining the cleaning performance and the safety of the motor 28 can be improved. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a drum type washing machine that performs washing, rinsing, and dewatering in a rotating drum having a rotation center axis in a horizontal direction or an inclination direction.

  Conventionally, this type of drum type washing machine is configured as shown in FIG. Hereinafter, the configuration will be described.

  As shown in FIG. 10, the rotating drum 101 is provided with a large number of water passage holes 102 on the entire outer periphery thereof, and is rotatably disposed in the outer tub 103. One end of the rotating shaft 104 is fixed in a substantially horizontal direction at the rotation center of the rotating drum 101, and a driven pulley 105 is fixed on the other end of the rotating shaft 104. The first motor 106 rotates and rotates or rotates the rotating drum 101 at a first rotation speed N1 (for example, 53 r / min), and the second motor 107 moves the rotating drum 101 to the first rotation. Dehydration is performed by rotating at a rotation speed N2 of 2 (for example, 1000 r / min).

  The first motor 106 and the second motor 107 are connected to the driven pulley 105 via belts 108 and 109, respectively. The driven pulley 105 has two speed reduction ratios. The first motor 106 is connected to the driven pulley 105a having a large speed reduction ratio via the belt 108, and the low speed rotation of the rotary drum 101 is performed by the second motor. 107 is connected to a driven pulley 105b having a small reduction ratio via a belt 109 to realize high-speed rotation of the rotary drum.

  The outer tub 103 is configured by a substantially circular outer tub main body 103a whose cross section is centered on the rotation shaft 104 and a substantially circular outer tub front plate 103b covering the opening of the outer tub main body 103a. The rotary drum 101 and the outer tub 103 are configured so that the shape in a direction orthogonal to the rotary shaft 104 is substantially concentric with the rotary shaft 104 as the center, and a substantially concave shape that houses the heater 114 on the bottom side. The heating body accommodation chamber 115 is provided.

  The outer tub 103 is suspended from the outer box 110 so as to be swingable by a spring body 111, and vibration at the time of dehydration is reduced by the vibration isolation damper 112, and vibration at the time of steady dehydration is not transmitted to the outer box 110. A weight 113 is provided to support vibration isolation and reduce vibration during dehydration. Further, one end of a drainage hose 116 is connected to the bottom of the outer tub 103, and the other end of the hose 116 is connected to a drainage pump 117 so that the washing water in the outer tub 103 is drained. Near the lower portion of the heater 114, a temperature detection device 118 and an overtemperature prevention device 119 are fixed to the bottom of the outer tub body 103a.

  The substantially cylindrical packing member 120 is made of a flexible material such as rubber and connects the opening of the outer tub 103 corresponding to the front opening of the rotating drum 101 and the front opening of the body. The tank side end is fixed to the outer tank front plate 103b. A lid 121 is provided at the opening on the front of the body so as to be freely opened and closed. The water supply valve 122 supplies water into the outer tub 103. The control device 123 controls operations of the first motor 106, the second motor 107, the heater 114, the drainage pump 117, the water supply valve 122, and the like, and sequentially controls a series of processes such as washing, rinsing, and dehydration (for example, , See Patent Document 1).

  Note that the control device 123 includes a stroke control unit, input settings, a display unit, and the like.

  To explain the operation in the above configuration, the lid 121 is opened, the laundry is put into the rotating drum 1, the power switch (not shown) is turned on, and then the start switch (not shown) provided in the control device 123 is turned on. When the operation is started by operating, the water supply valve 122 operates to supply water, and when a predetermined water level is detected by a water level detection means (not shown), the water supply is stopped and the first motor 106 is driven. In the washing process, since the laundry contains water, the revolving drum 101 is rotationally driven by the first motor 106 at the first rotation speed N1 while supplying water, and the laundry in the rotating drum 101 is lifted to the surface of the water. Fall down.

  When the washing process ends, the drain pump 117 operates to drain the washing water in the outer tub 103. In the rinsing process, the same operation as in the washing process is performed.

In the dewatering process, the rotary drum 1 is rotationally driven by the second motor 107 at the second rotation speed N2, and the laundry is dewatered by centrifugation. At this time, if the laundry in the rotating drum 101 is shifted, that is, unbalanced, the swinging bodies such as the rotating drum 101 and the outer tub 103 vibrate, but when the dehydration is started, the vibration isolating damper 112 vibrates the swinging body. At the time of steady dehydration, the vibration is not transmitted to the outer box 110 by the vibration isolation mechanism of the vibration isolation damper 112.
JP-A-10-263285

  However, in such a conventional configuration, if a high torque is applied to the motor at the start of washing agitation, the motor is demagnetized and the rotating drum cannot be started, and if the motor is continuously loaded, In some cases, the temperature increased and the motor could not be operated. In particular, in the washing agitation process, a first agitation process in which normal rotation, pause, inversion, and pause are repeatedly performed at a rotational speed that shows the behavior of the laundry lifted by the rotation of the rotating drum falling from the height at which the weight of the laundry is reduced. Then, the rotating drum is rapidly arc-rotated, 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 from the lowest position of the rotating drum to more than 90 degrees and less than 180 degrees After being lifted, the movement of the laundry is peeled off from the inner surface of the rotating drum due to its inertia and its own weight due to the sudden braking of the rotation of the motor and falls to the side opposite to the lifting side of the lower range of the rotating drum alternately forward and reverse. When configured to alternately and repeatedly perform the second stirring step to be repeated, mechanical force can be exerted while preventing the laundry from becoming entangled in the second stirring step, While tangling, twisting, wrinkles, etc. of the rinse can be reduced, the washing performance can be improved by adding the effect of hand washing, but on the other hand, high torque is applied to the motor due to the sudden arc rotation, demagnetization. When the motor is continuously operated as it is, there has been a problem with respect to the safety of the motor, for example, the temperature of the motor increases and the motor cannot be driven.

  The present invention solves the above-mentioned conventional problems, and the motor drive uses rapid arc motion and rapid braking, and the laundry is stuck to the inner surface of the rotary drum by the centrifugal force due to the rapid arc rotation of the rotary drum. After being lifted from the lower position to a position of more than 90 degrees and less than 180 degrees, the laundry is peeled off from the inner surface of the rotating drum by its inertia and its own weight due to the sudden braking of the rotation of the motor and the lower range of the rotating drum is lifted If the motor is demagnetized and stirring cannot be started in the second stirring process in which the action of dropping to the opposite side is repeated alternately in the forward and reverse directions, the second stirring process is not performed and the lifting is performed by rotating the rotating drum. Washing performance is achieved by performing the first agitation process that repeats normal rotation, pause, inversion, and pause at a rotational speed that shows the behavior of the washed laundry falling from the height where its own weight wins While retaining, it can reduce the load on the motor, and its object is to provide a drum type washing machine having an improved safety of the motor.

  In order to achieve the above-mentioned object while solving the conventional problems, a drum type washing machine according to the present invention comprises a bottomed cylindrical rotating drum having a rotating shaft in a horizontal direction or an inclined direction, and the rotating drum. A bottomed cylindrical water receiving tub that is freely included, a washing machine main body that swingably supports the water receiving tub, and a laundry machine that is provided in the washing machine main body for loading and unloading laundry. A door body that opens and closes an opening, a motor that rotationally drives the rotary drum, water supply means that controls the supply of washing water into the water receiving tub, a series of washings by controlling the motor and water supply means, Control means for controlling a rinsing and dehydration process, and the control means drops the laundry lifted by the rotation of the rotating drum from a height at which its own weight is superior in at least one of the washing step and the rinsing step. A first agitation process in which the rotating drum continuously repeats normal rotation, pause, inversion, and pause at a rotational speed indicating movement, and the rotary drum is rapidly rotated by arc, and the centrifugal rotation by the rapid arc rotation of the rotary drum is performed. After the laundry is adhered to the inner surface of the rotating drum by force and lifted from the lowest position of the rotating drum to a position exceeding 90 degrees and less than 180 degrees, the washing is performed by sudden braking of the rotation of the motor. A second agitation step is alternately repeated, in which the object is peeled off from the inner surface of the rotating drum due to its inertia and its own weight and dropped to the opposite side to the lifting side of the lower range of the rotating drum. In the case where the stirring cannot be started at least once in the second stirring step, the process proceeds to the first stirring step.

  In this way, in the second stirring process that repeats forward and reverse rotation at a rapid speed, when the motor is demagnetized and stirring cannot be started, the second stirring process is not performed, and the first stirring process is performed. The load on the motor can be reduced while maintaining the cleaning performance, the motor temperature can be prevented from increasing, and the motor cannot be operated, thereby improving the safety of the motor.

  In the drum type washing machine of the present invention, the laundry is stuck to the inner surface of the rotating drum by the centrifugal force generated by 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. After that, the laundry is peeled off from the inner surface of the rotating drum due to its inertia and its own weight due to the sudden braking of the rotation of the motor, and the operation of dropping to the side opposite to the lifting side of the lower range of the rotating drum is repeated alternately forward and reverse. In the second stirring step to be performed, the state where the motor is demagnetized and stirring cannot be started is not repeated, so that the load on the motor is reduced while maintaining the cleaning performance, the temperature of the motor is increased, and the motor is driven. Impossibility can be prevented and the safety of the motor can be improved.

  According to a first aspect of the present invention, there is provided a bottomed cylindrical rotating drum having a rotating shaft in a horizontal direction or an inclined direction, a bottomed cylindrical water receiving tank that rotatably includes the rotating drum, and a shaking of the water receiving tank. A washing machine main body that is movably supported; a door body that is provided in the washing machine main body and opens and closes an opening for taking in and out the laundry; and a motor that rotationally drives the rotary drum, A water supply means for controlling the supply of washing water into the water receiving tub; and a control means for controlling a series of washing, rinsing and dehydration processes by controlling the motor and the water supply means. In at least one of the step and the rinsing step, the rotating drum continuously rotates forward, pauses, and inverts at a rotational speed that indicates a behavior in which the laundry lifted by the rotation of the rotating drum falls from a height that its weight exceeds. , Pause The first stirring step to be repeated, the rotating drum is rapidly arc-rotated, and the laundry is adhered to the inner surface of the rotating drum by the centrifugal force due to the rapid arc rotation of the rotating drum, and the maximum from the lowest position of the rotating drum After being lifted to a position exceeding 90 degrees and less than 180 degrees, the laundry is peeled off from the inner surface of the rotating drum due to its inertia and its own weight due to sudden braking of the rotation of the motor, and the lower range of the rotating drum is lifted When the second agitation process in which the action of dropping to the side opposite to the side is repeated alternately in the forward and reverse directions and the agitation activation cannot be performed at least once in the second agitation process, Transition to the first stirring stroke, in the second stirring stroke that repeats the forward and reverse rotation of the rapid speed, the motor is demagnetized and the stirring cannot be started By not repeated, while maintaining the cleaning performance by reducing the load on the motor, the temperature rise of the motor and to prevent disablement of the motor drive, it is possible to improve the safety of the motor.

  According to a second aspect of the present invention, in the first aspect, the control means starts from the first agitation step when the operation is restarted after the operation is temporarily stopped in at least one of the washing step and the rinsing step. Yes, the wash water contained in the clothing during the temporary stop accumulates downward in the rotating drum, causing a bias, and the motor is demagnetized from the second stirring step in the state where the highest torque is applied when the motor starts stirring. Starting from the first stirring step, which is difficult to perform, makes it easier to start stirring, further reduces the load on the motor, prevents the motor temperature from rising, and disables motor operation, improving motor safety can do.

  According to a third invention, in the first or second invention, the control means is configured not to perform the second agitation process when the agitation activation cannot be performed a predetermined number of times or more in the second agitation process. By preventing the motor from demagnetizing and preventing agitation starting, the load on the motor can be reduced while maintaining the cleaning performance, preventing the motor temperature from rising and the motor drive from being disabled, The safety of the motor can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a drum type washing machine according to a first embodiment of the present invention, FIG. 2 is a block diagram of a control circuit of the drum type washing machine, and FIG. 3 is a drum type washing machine. It is an enlarged front view of the input setting of the machine and the display means.

  As shown in FIG. 1, the rotating drum 24 is formed in a bottomed cylindrical shape, and a large number of water passage holes 25 are provided on the entire outer periphery thereof, and are rotatably disposed in the water receiving tank 26. A rotation axis (rotation center axis) 27 is provided at the rotation center of the rotary drum 24 in a substantially inclined direction, and the axial center direction of the rotation drum 24 is inclined downward from the front side toward the back side. A motor 28 attached to the rear surface of the water receiving tank 26 is connected to the rotary shaft 27, and the rotary drum 24 is rotated in the forward and reverse directions. Several protruding plates 29 are provided on the inner wall surface of the rotating drum 24 to facilitate the stirring of the clothes. The opening provided in the upward inclined surface on the front side of the water receiving tub 26 is covered with a lid 30 so that it can be opened and closed. By opening the lid 30, the laundry 21 can be taken in and out of the rotary drum 24 through the clothing entrance 31. I have to. Since the lid 30 is provided on the upward inclined surface, when the laundry 21 is put in and out, it can be performed without bending the waist. Note that the lid 30 has a configuration capable of operating the lid lock 40 so as not to open in order to maintain the safety of the user during the driving operation.

  The water receiving tub 26 is suspended and supported by a spring 33 and a damper 34 from the washing machine body 32 so as to be swingable, and a drainage path 35a having one end connected to a drainage port 35 below the water receiving tub 26 has the other end. The washing water in the water receiving tank 26 is drained by connecting to a drain valve (drainage means) 36. The water supply valve (water supply means) 37 supplies water into the water receiving tank 26 through the detergent charging case 37a and the water supply path 38a. The water supply valve 37 also communicates with a second water supply means 38b capable of supplying water from above the rotating drum 24 via the second water supply path 38c.

  The water level detection means 39 detects the water level in the water receiving tank 26. In addition, a heater (heating means) 41 including a sheathed heater for heating the washing water and a temperature detection means 42 for detecting the temperature of the washing water are provided at the lower inner bottom of the water receiving tub 26, and the laundry 21 in the rotary drum 24 is provided. It has the function of washing with warm water to enhance the washing effect.

  An overflow port 49 is provided on the side wall of the water receiving tank 26, and is configured to overflow (overflow) when the amount of water exceeds the water level of the overflow port 49. One end of an overflow path (overflow path) 49 a is connected to the overflow port 49, and the other end of the overflow path (overflow path) 49 a is connected to a drainage path 35 b on the downstream side of the drain valve 36.

  In the present embodiment, the rotation shaft 27 is provided in a substantially inclined direction at the rotation center of the rotary drum 24, and the axial center direction of the rotary drum 24 is inclined downward from the front side to the back side. However, the rotary shaft 27 may be provided in the substantially horizontal direction at the rotation center of the rotary drum 24, and the axial center direction of the rotary drum 24 may be provided in the substantially horizontal direction.

  The control device 43 constitutes a circuit as shown in FIG. 2, and controls the operation of the motor 28, the drain valve 36, the water supply valve 37, the heater 41, etc., and sequentially controls a series of steps of washing, rinsing and dehydration. Control means 44 comprising a microcomputer is provided. The control unit 44 inputs information from the input setting unit 45 for setting the driving course and the like, displays the information on the display unit 46 based on the information, notifies the user, and starts the operation by the input setting unit 45. Is set, the data from the water level detection means 39 for detecting the water level in the water receiving tank 26 is input, and the operations of the drain valve 36, the water supply valve 37, the heater 41, etc. are performed via the load driving means 47. Control and perform washing operation.

  As shown in FIG. 3, the input setting means 45 includes a washing time setting switch 45a for setting the washing time, a rinsing frequency setting switch 45b for setting the number of times of rinsing, a dehydration time setting switch 45c for setting the dehydration time, and start / pause. A switch 45e, a power-on switch 45f, a power-off switch 45g, a water level change input setting switch 45h, and a water temperature change input switch 45i are provided.

  As shown in FIG. 3, the display means 46 is a course setting display section for displaying a course set by a washing time display section 46a, a rinse count display section 46b, a dehydration time display section 46c, and a second course setting switch 45d. 46d, a water level display unit (water level display means) 46e, a water temperature display unit 46f, a number display unit 46g, a lid lock display unit 46h, and the like. The number display unit 46g displays the remaining time during normal operation. However, if an abnormality occurs during operation, the number display unit 46g is an abnormal display unit that displays an abnormal state using a certain symbol and number. Also comes to work. Examples of the abnormality display include an abnormality display in which drainage cannot be performed, an abnormality display in which water cannot be supplied, and an abnormality display informing that the door body is not properly closed.

  FIG. 4 is a main part operation flowchart of the drum-type washing machine according to the first embodiment, and FIG. 5 is a diagram illustrating a stirring sequence of the washing process according to the first embodiment.

  The operation will be described below with reference to FIGS. When the user opens the door body 30 and puts the laundry 21 into the rotary drum 24 and closes the door body 30 again, the operation starts in step 100, and after the power switch 45f is turned on in step 101, in step 102 The course is set by operating the course setting switch 45d. Further, in step 103, it is determined whether or not the settings of the water level, the water temperature, the washing time, the number of times of rinsing, and the dehydration time are changed. If there are changes, the washing time setting switch 45a, the number of times of rinsing setting switch 45b, and the setting of the dehydration time are determined. The switch 45c, the water level change input setting switch 45h, and the water temperature change input switch 45i are operated to change each setting. In step 104, the change contents are displayed on the display means 46. If there is no change, the process proceeds to step 105. In step 105, when the operation is started by operating the start switch 45 e provided in the control device 43, the lid lock 40 is closed by the control means 44 in step 106.

  In step 107, the water supply valve 37 is operated to supply water. In step 108, it is determined whether or not the water level detecting means 39 supplies water to a predetermined water level. When it is determined that the water has been supplied to a predetermined water level, the process proceeds to the first stirring step of washing in Step 109, the motor 28 is driven to start stirring of the rotating drum 24, and stirring 1 (for example, 15 seconds operation, Stop for 3 seconds and repeat normal rotation inversion at a rotation speed N = 45 rpm). If the water has not been supplied to the predetermined water level, the process returns to step 107. In the washing process, since the laundry 21 absorbs moisture, the water level is lowered, so that the deficiency is replenished and the rotating drum 24 is rotated at a rotational speed N by the motor 28. The laundry 21 in the rotating drum 24 is It is lifted by the protruding plate 29 and falls onto the water surface or other clothes or the inner bottom of the rotating drum 24.

  In step 110, it is confirmed whether or not the stirring 1 has been stirred for a predetermined time S1 (for example, 54 seconds). If stirring is performed for the predetermined time S1, the process proceeds to step 111. If it is not the predetermined time S1, the process returns to step 109 and the stirring 1 is continued. In step 111, it is confirmed whether or not the washing time has reached a predetermined time T1 (for example, 25 minutes). If the predetermined time T1 has been reached, the routine proceeds to step 116 where the driving of the motor 28 is stopped and the rotating drum is stopped. 24 is stopped, the washing process is finished, and the next rinsing process is started.

  If the predetermined time T1 has not been reached in step 111, the process proceeds to the second stirring step in step 112, and the motor 28 is driven to start stirring of the rotary drum 24 and stirring 2 is performed.

  Here, the stirring 2 in the second stirring step will be described.

  The stirring 2 is performed in an arc rotation drive mode in which the arc rotation at a rapid speed exceeding 90 degrees and less than 180 degrees and rapid braking of the rotating drum 24 is performed. According to this, the laundry 21 can be lifted up to more than 90 degrees and less than 180 degrees by 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 lifting, the laundry 21 can be reliably peeled off from the inner surface of the rotary drum 24 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.

  Regarding 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. 6 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. 6 is moved from the broken line position illustrated in FIG. 6 (a) to the solid line position by the arc rotation of more than 90 degrees and less than 180 degrees of the rotating drum 24. 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. 6 (a), 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 to the 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 24 by rotating the arc of the rotating drum 24 alternately forward and backward, 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. As a result, the twisting action and the sticking to the inner surface of the rotating drum 24 can be prevented, and the laundry 21 can be easily taken out and wrinkles can be greatly reduced. . 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 24 is driven by the rapid acceleration that the laundry 21 sticks to the inner surface of the rotating drum 24 until the laundry 21 reaches around 90 degrees from the lowest position of the rotating drum 24. Rapid acceleration that causes the laundry 21 to adhere to the inner surface of the rotary drum 24 by around 90 degrees where the laundry 21 cannot follow the rotation of the rotary drum 24 due to the lifting of the rotary drum 24 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 rotation speed of the rotary drum 24 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 24 is performed with a sudden braking operation when the arc rotation of the rotating drum 24 is more than 90 degrees and less than 180 degrees, thereby ensuring that the laundry 21 is stuck. Even under conditions that satisfy the sudden acceleration, the direction of arc rotation is suddenly reversed in the normal and reverse directions, and the laundry 21 is reliably peeled off by inertia and its own weight during sudden acceleration at the final stage of arc rotation. 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 is also configured such that the laundry 21 is moved to the rotating drum 24 by the centrifugal force due to the sudden arc rotation of the rotating drum 24. After affixing to the inner surface and lifting it upward, the driving of causing the laundry 21 to be peeled off from the inner surface of the rotating drum 24 due to its inertia and dropping by its own weight by sudden braking of the rotating drum 24 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 rotary drum 24 by the centrifugal force caused by the rapid arc rotation of the rotary drum 24 and lifted up to the upper range of the rotary drum 24, and then suddenly brakes the rotary drum 24. 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 rotary drum 24 due to its inertia and dropped to the side opposite to the lifting side of the lower range of the rotary drum 24 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 24 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 24 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 stop time indicated by the circled symbol 1 in FIG. 7 to the rotation speed of about 50 rpm in the vicinity indicated by the circled symbol 2, the laundry 21 is reliably attached. Further, the rotation angle θ of the rotary drum 24 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 24 and up to 180 degrees. However, in this example, the rotation angle is around 125 degrees indicated by the circled reference numeral 2. The solid solid line described as “sticking level” near 125 degrees intersects with the solid line of rotation of the rotating drum 24, and thereafter, the solid line of rotation of the rotating drum 24 corresponds to the thick solid line described as “sticking level”. Since it is on the lower side, the rotational speed acting on the laundry 21 by braking that stops at around a rotational angle of 140 degrees reaching the circled symbol 3 from around the rotational angle of 125 degrees and the maximum rotational speed of 45 rpm that peels off from the inner surface of the rotating drum 24 due to its own weight. 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. Moreover, 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 shown 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 symbol 2 in FIG. 6A, and the subsequent arcs shown in the circled symbols 3 to 6 in FIG. As shown by the solid line in FIG. 7, the rotation is performed in the range of about 140 degrees to about 30 degrees, so that during initial arc rotation, the circled symbol 1 in FIG. 6A is indicated by a solid line, and the circled symbol 2 is indicated by a broken line. As shown, the laundry 21 stationary in the lower range of the rotary drum 24 is lifted up to the upper part on the left and right initial arc rotation sides by arc rotation near 120 degrees and braked between 120 degrees and 140 degrees. The left and right sides of the rotating drum 24, specifically, the rotating drum 24 is ensured to fall almost on the diameter line, and the subsequent arc rotation is set to 110 degrees between about 140 degrees and 30 degrees, and approaches the one side of the rotating drum 24. Specifically, the laundry 21 dropped by about 30 degrees The maximum drop distance corresponding to the upper part of the same side of the rotary drum 24, specifically, approximately 150 degrees and dropping to the opposite left and right sides of the rotary drum 24 is approximately symmetrical and is the diameter of the rotary drum 24. Can be achieved reliably. Thereby, the effect of unraveling and hitting the laundry 21 can be enhanced.

  When stirring 2 in the second stirring step as described above is being performed, it is checked in step 113 whether stirring 2 can be started. If stirring cannot be started, step 109 is performed. Return and stir 1. If the agitation can be started in step 113, then after step 114, it is confirmed whether or not the agitation 2 is agitated for a predetermined time S2 (for example, 8 seconds). Control goes to step 115. If it is not the predetermined time S2, the process returns to step 112 and the stirring 2 is continued. In step 115, it is confirmed whether or not the washing time has reached the predetermined time T1, and if the predetermined time T1 has been reached, the routine proceeds to step 116 where the driving of the motor 28 is stopped and the rotary drum 24 is stopped. Finish the laundry process and enter the next rinse process.

  As described above, in the washing process in which the first stirring process and the second stirring process in which the rapid arc rotation and the rapid braking are performed alternately are repeated in the first stirring process, the demagnetization of the motor occurs in the first stirring process. If the stirring operation cannot be started in the second stirring process that is easy and difficult to start stirring, the second stirring process is not completed and the first stirring process is performed, and the motor is demagnetized so that stirring cannot be started. By doing so, it is possible to reduce the load on the motor while maintaining the cleaning performance, to prevent the temperature of the motor from being increased and to prevent the motor from being operated, and to improve the safety of the motor.

(Embodiment 2)
FIG. 8 is a main part operation flowchart of the drum type washing machine according to the second embodiment of the present invention. The longitudinal sectional view, block control circuit diagram, input setting means, and display means of the second embodiment will be described using FIG. 1, FIG. 2, and FIG. 3, which are the same as those of the first embodiment.

  The control means 44 performs the operation from the first agitation process when the operation is resumed after the operation is temporarily stopped in the washing process. Other configurations and operations of the stirring 1 in the first stirring process and the stirring 2 in the second stirring process are the same as those in the first embodiment, and the description thereof is omitted.

  In the above configuration, the operation will be described with reference to FIG. Note that the same parts as those in Embodiment 1 are omitted.

  During the second stirring process, when the user operates the start switch 45e provided in the control device 43 to set a temporary stop in step 114, the driving of the motor 28 is stopped by the control means 44 in step 115, and the rotating drum 24 is stopped.

  In step 116, when the user operates the start switch 45e provided in the control device 43 to set restart, the motor 28 is driven by the control means 44 in step 117 to start the rotation of the rotary drum 24. At this time, the process returns to step 109 and starts from stirring 1 in the first stirring step.

  As described above, after the operation is temporarily stopped in the washing process, when the operation is restarted, the first agitation process is performed. Stirring is started by starting from the first agitation stroke where the motor is less susceptible to demagnetization than the second agitation stroke in the state in which the inside accumulates and becomes biased and the highest torque is applied when the agitation is activated. In addition, the load on the motor can be further reduced, the temperature of the motor can be prevented from being increased, and the motor cannot be driven to improve the safety of the motor.

(Embodiment 3)
FIG. 9 is a main part operation flowchart of the drum type washing machine according to the third embodiment of the present invention. The longitudinal sectional view, block control circuit diagram, input setting means and display means of the third embodiment will be described with reference to FIGS. 1, 2 and 3 which are the same as those of the first embodiment.

  The control means 44 is configured not to perform the second stirring step when stirring cannot be started a predetermined number of times or more in the second stirring step. Other configurations and operations of the stirring 1 in the first stirring process and the stirring 2 in the second stirring process are the same as those in the first embodiment, and the description thereof is omitted.

  In the second stirring step, when stirring cannot be started in step 113, the process proceeds to step 114, where it is confirmed whether or not the number of times stirring cannot be performed has reached the predetermined number of times R1, and the predetermined number of times R1 has been reached. If this happens, the second agitation process is not performed in the subsequent washing process in step 115.

  As described above, when the agitation start cannot be performed a predetermined number of times in the second agitation process, the second agitation process is not performed so that the motor cannot be demagnetized and the agitation activation cannot be repeated. As a result, the load on the motor can be reduced while maintaining the cleaning performance, the temperature of the motor can be prevented from being increased and the motor cannot be driven, and the safety of the motor can be improved.

  As described above, the drum-type washing machine according to the present invention has a rotating speed at which the laundry lifted up by the rotation of the rotating drum exhibits a behavior of falling from a height where its own weight is superior, and the rotating drum continuously rotates forward. The first agitation process in which pause, inversion, and pause are repeated, and the rotating drum is rapidly arc-rotated, and the laundry is stuck to the inner surface of the rotating drum by centrifugal force due to the sudden arc rotation of the rotating drum, and the lowest position of the rotating drum The laundry is lifted from the inner surface of the rotating drum due to its inertia and its own weight due to the sudden braking of the rotation of the motor after being lifted to a position exceeding 90 degrees and less than 180 degrees at the maximum. The operation of dropping to the opposite side is repeated alternately with the second stirring step, which is alternately repeated forward and reverse, and the motor is demagnetized and the stirring can be started in the second stirring step. By not repeating the state, it is possible to reduce the load on the motor and improve the safety of the motor while maintaining the cleaning performance, so it can be used for a drum-type washing machine with a drying function. .

The longitudinal cross-sectional view of the drum type washing machine in Embodiment 1 of this invention Block diagram of the drum type washing machine Enlarged front view of input setting means and display means of the drum type washing machine Main part operation flowchart of the drum type washing machine The figure which shows the sequence of the washing process of the drum type washing machine (A) Process schematic diagram of forward / reverse arc rotation drive mode of the drum type washing machine (b) Explanation showing left and right interchange of laundry lifting position and fall position in forward / reverse arc rotation drive mode of the drum type washing machine Schematic diagram for Rotation characteristics diagram for the sticking and peeling of laundry on the inner surface of the rotating drum to ideally realize the forward and reverse arc rotation drive mode of the drum type washing machine Main part operation | movement flowchart of the drum type washing machine in Embodiment 2 of this invention Main part operation | movement flowchart of the drum type washing machine in Embodiment 3 of this invention Vertical section of a conventional drum-type washing machine

Explanation of symbols

21 Laundry 24 Rotating drum 28 Motor

Claims (3)

A bottomed cylindrical rotating drum having a rotating shaft in a horizontal direction or an inclined direction, a bottomed cylindrical water receiving tub that rotatably includes the rotating drum, and a laundry that supports the water receiving tub in a swingable manner. A machine body, a door body that is provided in the washing machine body and opens and closes an opening for putting laundry into and out of the rotating drum, a motor that rotationally drives the rotating drum, and the water receiving tank Water supply means for controlling the supply of washing water; and control means for controlling the motor and the water supply means to control a series of washing, rinsing and dehydration processes, the control means comprising at least a washing step and a rinsing step On the other hand, the rotating drum continuously repeats normal rotation, pause, inversion, and pause at a rotation speed that indicates that the laundry that is lifted by the rotation of the rotary drum falls from the height that its own weight wins. 1 and the rotating drum is rapidly arc-rotated, and laundry is adhered to the inner surface of the rotating drum by centrifugal force due to the rapid arc rotation of the rotating drum, and 90 degrees at the maximum from the lowest position of the rotating drum. After being lifted to a position of less than 180 degrees, the laundry is peeled off from the inner surface of the rotating drum due to its inertia and its own weight due to sudden braking of the rotation of the motor and opposite to the lifting side of the lower range of the rotating drum If the second agitation process is repeated alternately and forward and backward, the first dropping operation is performed at least once in the second agitation process. A drum-type washing machine designed to shift to the stirring process. The drum-type washing machine according to claim 1, wherein the control means starts from the first stirring step when the operation is restarted after the operation is temporarily stopped in at least one of the washing step and the rinsing step. The drum type washing machine according to claim 1 or 2, wherein the control means is configured not to perform the second stirring step when stirring cannot be started for a predetermined number of times or more in the second stirring step.