JP4080412B2 - Washing machine - Google Patents

Description

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

  As a conventional example 1, in a rotary drum type washing machine that performs washing, rinsing, and dewatering of laundry in a rotary drum having a central axis of rotation in the horizontal direction, a rotary drum is used for washing synthetic fibers such as a setter. While rotating back and forth in the range of ° to 120 °, it is periodically rotated in the forward and reverse directions in the middle to replace the upper and lower positions of the laundry, so that the laundry can be washed without damage or shrinkage. A method for solving this problem has been proposed (see, for example, Patent Document 1).

In addition, as the conventional example 2, the method of the above conventional example 1 is further improved, and an optimal washing effect without any damage or shrinkage on the laundry that requires a special soft washing operation such as wool or silk is possible. As can be obtained, one washing operation period is divided into two front and rear strokes, and in the first half of the washing stroke, the rotating drum is repeatedly rotated in the forward and reverse directions at a first water level at a first rotation angle smaller than one rotation. In the latter half of the washing process, water is supplied to the second water level where the laundry higher than the first water level floats, and in the forward and reverse directions at the second rotation angle smaller than the first rotation angle. There has been proposed a method in which washing is performed by repeated rotation (see, for example, Patent Document 2).
Japanese Examined Patent Publication No. 63-12539 Japanese Patent No. 3296712

  However, in the above-described conventional example 2, when the rotating drum is repeatedly rotated at a rotation angle smaller than one rotation in the forward and reverse directions to perform washing such as wool and silk, the rotation angle of the rotating drum is reduced according to the water level. However, since mechanical force and frictional force are not applied to the laundry and the fabric is not damaged or shrunk, the upper and lower positions of the laundry are not reversed.

  The present invention has been made in view of such conventional problems, the purpose of which can be gently washed without causing damage such as fabric damage or shrinkage on delicate clothing such as wool and silk, Another object of the present invention is to provide a washing machine having an improved cleaning effect without causing uneven washing.

In order to achieve the above-described object, a washing machine according to the present invention stores a laundry and has a rotating drum having a rotation center axis in a horizontal direction or an inclination direction, and includes the rotating drum and elastically supports the washing machine body. A water receiving tank, a motor for driving the rotating drum, a water supply means for supplying water into the water receiving tank, a water level detecting means for detecting the water level in the water receiving tank, and an input setting means for setting the operation of the washing machine , A washing machine comprising control means for controlling the washing operation and water supply means set by the input setting means and control means for controlling the motor, wherein the control means supplies water in the washing process according to the setting by the input setting means A shaking process in which the water level is raised stepwise by controlling the means, the motor is controlled, and the rotational angle of the rotating drum is controlled to rotate in the forward and reverse directions at an angle smaller than 180 degrees; On the way Intermittently causes the rotation angle of the rotary drum made an inverting step for rotation control to more than 180 degrees, according to the water level sensed is increased by the water level detecting means has the configuration cycle is set longer to perform the inversion process ing.

According to this configuration, the washing level is increased stepwise (gradually) so that the washing liquid can be uniformly permeated throughout the clothes and can be washed gently and efficiently. The effect of the baffle (projection plate) that has the function of hooking and reversing clothes as the water level rises intermittently during the reversal process, and reduces the mechanical force on the clothes as much as possible. Therefore, by increasing the period of the reversal process, it is possible to reliably prevent the upper and lower washing unevenness of the laundry without causing damage such as cloth damage or shrinkage, and to enhance the washing effect.

  In the washing machine according to the present invention, it is preferable that the control unit sets the rotational speed of the rotating drum in the reversing process to be higher than the rotational speed of the rotating drum in the shaking process.

  According to this configuration, in the reversal process, the clothes are hooked on the baffle to be reversed. Therefore, by setting the rotation speed higher than the rotation speed in the shaking washing process, the clothes are reliably reversed and washing is performed efficiently. be able to.

Further, in the washing machine according to the present invention, a washing machine further comprises a laundry amount detecting means for detecting the laundry weight of the laundry, the control means, the more the laundry amount sensed by the laundry amount detecting means, reversing stroke It is preferable to increase the number of inversions .

  According to this configuration, the greater the amount of laundry, the greater the unevenness of washing. Therefore, by increasing the number of inversions, optimal washing can be performed according to the amount of clothing.

In the washing machine according to the present invention, the control means increases the rotational speed of the rotating drum in the reversing process when the amount of cloth detected by the cloth amount detecting means is large , and rotates the rotating drum when the amount of cloth is small. It is preferable to reduce the number .

  According to this configuration, in the reversing process, when the amount of laundry is large, the clothing is reliably reversed by increasing the number of rotations. Conversely, when the amount of laundry is small, the number of rotations is decreased. In this way, damage to clothing can be prevented.

  Moreover, in the washing machine according to the present invention, it is preferable that the control means provide a rest time after the reversal process.

  According to this configuration, the washing liquid can be further infiltrated into the clothing by putting a rest time after the reversing process.

  In the washing machine according to the present invention, it is preferable that the control means prohibits the execution of the reversing process when the water level detected by the water level detection means reaches the maximum water level.

  According to this configuration, when the maximum water level is reached, even if the baffle is rotated, it will not be caught on the clothing, so the execution of the inversion process is prohibited to prevent damage to the clothing, and only the penetration in the shaking process is effective. Cleaning is possible.

  According to the present invention, there is provided a washing machine that can gently wash laundry such as wool and silk without causing damage such as fabric damage or shrinkage, and has improved washing effect without causing uneven washing. There is a special effect that it is possible to do.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view illustrating a configuration example of a washing machine according to an embodiment of the present invention. In FIG. 1, a rotating drum 1 is formed in a bottomed cylindrical shape, and a large number of water passage holes 2 are provided on the entire surface of the outer periphery, and are rotatably disposed in a water receiving tank 3. A rotation axis (rotation center axis) 4 is provided in the inclination direction at the rotation center of the rotary drum 1, and the axial center direction of the rotation drum 1 is inclined downward from the front side toward the back side. A motor 5 attached to the rear surface of the water receiving tank 3 is connected to the rotating shaft 4, and the rotating drum 1 is rotationally driven by the motor 5 in the forward and reverse directions. Several protruding plates 6 are provided on the inner wall surface of the rotating drum 1.

  The opening provided in the upward inclined surface on the front side of the water receiving tub 3 is covered with a lid 7 so that it can be opened and closed. By opening the lid 7, the laundry is put into the rotary drum 1 through the clothing entrance 8 and rotated. The laundry can be taken out from the drum 1. Since the lid body 7 is provided on the upward inclined surface, the user can reduce the degree of bending the waist when putting in and out the laundry.

  The water receiving tub 3 is suspended from the washing machine body 9 by a spring body 10 and a damper 11 so as to be swingable. One end of the drainage path 12 is connected to the lower part of the water receiving tub 3, and the other end of the drainage path 12 is connected. Is connected to the drain valve 13 to drain the washing water in the water receiving tank 3. The water supply valve (water supply means) 14 is provided for supplying water into the water receiving tank 3 through the water supply path 15, and the water level detecting means 16 is provided for detecting the water level in the water receiving tank 3. .

  In this embodiment, the rotary shaft 4 is provided in the tilt direction at the rotation center of the rotary drum 1 and the axial center direction of the rotary drum 1 is tilted downward from the front side to the back side. The rotation shaft 4 may be provided in the horizontal direction at the center of rotation 1 and the axial center direction of the rotary drum 1 may be set in the horizontal direction.

  Although not illustrated in FIG. 1, a blower fan 17 that blows hot air and a heater 18 (see FIG. 2) that heats the hot air are provided in the rotary drum 1, and the laundry in the rotary drum 1 is provided. It has a drying function for drying.

  The control device 19 is configured as shown in FIG. 2 and controls operations of the motor 5, the drain valve (DV) 13, the water supply valve (FV) 14, the blower fan (F) 17, the heater (H) 18, and the like. And a control means 20 comprising a microcomputer for sequentially controlling a series of steps of washing, rinsing, dewatering and drying.

  The control means 20 inputs information from the input setting means 21 for setting a driving course and the like, displays the information on the display means 22 based on the information, notifies the user, and starts the operation by the input setting means 21. Is set, the data from the water level detection means 16 for detecting the water level in the water receiving tank 3 is input and the drain valve 13, the water supply valve 14, the blower fan 17, and the heater 18 are input via the load driving means 23. Control the operation of the washing, drying operation.

  At this time, the rotation control means 35 included in the control means 20 is connected to the inverter 26 via the drive circuit 25 based on information from the position detection means 24 (24a, 24b, 24c) that detects the position of the rotor of the motor 5. Is controlled to control the rotation of the motor 5 (the number of rotations and the rotation angle). The motor 5 is a direct current brushless motor, which is not shown, and is composed of a stator having a three-phase winding and a rotor having a two-pole permanent magnet disposed on the ring. The stator has a three-phase winding. The first winding 5a, the second winding 5b, and the third winding 5c to be configured are wound around an iron core provided with a slot.

  The inverter 26 is composed of a switching element including a parallel circuit of a power transistor (for example, an insulated gate bipolar transistor (IGBT)) and a reverse conducting diode. The switching elements include a series circuit of a first switching element 26a and a second switching element 26b, a series circuit of a third switching element 26c and a fourth switching element 26d, a fifth switching element 26e and a sixth switching element. The switching element 26f is composed of a series circuit, and the series circuit of each switching element is connected in parallel.

  Here, both ends of the series circuit of switching elements are input terminals, a DC power supply is connected, and output terminals are respectively connected to connection points of two switching elements constituting the series circuit of switching elements. The output terminal is connected to the U terminal, V terminal, and W terminal of the three-phase winding, and the U terminal, V terminal, and W terminal are connected by the on / off combination of two switching elements that constitute the series circuit of the switching element. The three states are positive voltage, zero voltage, and release, respectively.

  The on / off of the switching element is controlled by the control means 20 based on information from the three position detection means 24a, 24b, 24c made of Hall ICs. The position detection means 24a, 24b, and 24c are disposed on the stator so as to face the permanent magnets of the rotor at an electrical angle of 120 degrees.

  During one rotation of the rotor, the three position detecting means 24a, 24b, and 24c each output a pulse at an electrical angle of 120 degrees. The rotation control unit 35 detects when the signal state of any of the three position detection units 24a, 24b, and 24c changes, and based on the signals of the position detection units 24a, 24b, and 24c, the switching elements 26a to 26f. By changing the on / off state, the U terminal, the V terminal, and the W terminal are brought into three states of positive voltage, zero voltage, and release, and the first winding 5a, the second winding 5b, The third winding 5c is energized to create a magnetic field and rotate the rotor.

  The switching elements 26a, 26c, and 26e are each controlled by pulse width modulation (PWM). For example, the rotational speed of the rotor is controlled by controlling the energization ratio of high and low at a repetition frequency of 10 kHz. The rotation control unit 35 detects the cycle each time the signal state of any of the three position detection units 24a, 24b, and 24c changes, calculates the rotation speed of the rotor from the cycle, and sets it to the set rotation speed. The switching elements 26a, 26c and 26e are PWM-controlled.

  FIG. 3 is a block diagram showing the internal configuration of the rotation control means 35. In FIG. 3, the rotation control means 35 receives a signal from the position detection means 24, detects a rotation speed of the motor 5, a rotation speed detection means 35 a, a rotation speed setting means 35 b that sets the rotation speed of the motor 5, A rotation speed comparison means 35c for comparing the rotation speed set by the rotation speed setting means 35b with the rotation speed detected by the rotation speed detection means; a rotation speed change amount detection means 35d for detecting a change amount of the rotation speed; Based on the comparison result from the rotation speed comparison means 35c and the change amount of the rotation speed from the rotation speed change amount detection means 35d, the switching elements 26a, 26c, 26e An operation amount determination unit 35e that determines the operation amount of the PWM duty, and a PWM duty of the switching elements 26a, 26c, and 26e after being operated by the operation amount determination unit 35e. The duty ratio setting means 35f for setting the tee and outputting it to the drive circuit 25, and the PWM duty of the switching elements 26a, 26c, 26e gradually increased according to the elapsed time from the start of the motor 5 are stored and output to the drive circuit 25 And an energization ratio storage means 35g.

  The rotation control means 35 is energized until the number of times the signal state of any of the three position detection means 24a, 24b, 24c changes when the motor 5 is started up to 3, that is, until the motor 5 makes 1/2 rotation. The PWM duty of the switching elements 26a, 26c and 26e is controlled by driving the drive circuit 25 with the output signal of the ratio storage means 35g and thereafter with the output signal of the energization ratio setting means 35f.

  In the present embodiment, the rotational speed detection means 35a is configured to detect the rotational speed of the motor 5 based on the signal from the position detection means 24. However, the rotational speed detection means 35a is configured to detect the rotational speed of the rotary drum 1. Also good.

  Returning to FIG. 2, the current detection means 27 includes a resistor 28 connected to one input terminal of the inverter 26 and a current detection circuit 29 connected to the resistor 28, and the input current value of the inverter 26 is calculated. The output voltage is detected and supplied to the control means 20. When the motor 5 is a direct current brushless motor, the torque is substantially proportional to the input current. Therefore, the torque of the motor 5 is detected by detecting the input current value of the inverter 26 by the current detection circuit 29 connected to the resistor 28. can do.

  The cloth amount detecting means 30 detects the amount of laundry in the rotating drum 1, and the rotating drum 1 is detected by a signal from the current detecting means 27 when the rotating drum 1 is raised to a predetermined rotational speed (for example, 200 rpm). It is comprised so that the quantity of the laundry in 1 may be detected.

  The commercial power supply 31 is connected to the inverter 26 via a direct current power converter comprising a diode bridge 32, a choke coil 33, and a smoothing capacitor 34. However, this is an example, and the configuration of the DC brushless motor 5, the configuration of the inverter 26, and the like are not limited thereto.

  As shown in FIG. 4, the input setting means 21 includes a washing time setting switch 21a for setting a washing time, a rinsing frequency setting switch 21b for setting the number of times of rinsing, a dehydration time setting switch 21c for setting the dehydration time, and a drying time. A drying time setting switch 21d, a start / pause switch 21e, a power-on switch 21f, and a power-off switch 21g. The input setting means 21 is provided with a first course setting switch 21h and a second course setting switch 21i.

  The first course setting switch 21h sets a course to be driven, a course for performing a series of steps of washing, rinsing, dehydration, and drying, a course for performing steps of washing, rinsing, and dehydration, and a drying step only. The course to be performed can be switched and set in the above order each time it is turned on.

  The second course setting switch 21i switches and sets an automatic course, a rush course, a private course, a blanket course, a dry course, and the like, and is switched in the above order each time it is turned on.

  The display means 22 includes a washing time display section 22a, a rinse count display section 22b, a dehydration time display section 22c, a drying time display section 22d, and a course setting display section 22e that displays the course set by the second course setting switch 21i. Etc. Moreover, the display means 22 has a number display part 22h, and the display of the number display part 22h is a detergent amount display part 22f indicating that it is a detergent amount, and a remaining time display part indicating that it is the remaining time. 22g. Furthermore, the display means 22 has a soft keep display portion 22i indicating that soft keeping is performed after the drying operation.

  Next, the operation of the dry course for washing delicate clothes such as wool and silk in the washing machine configured as described above will be described with reference to FIGS. 5, 6, and 7.

  FIG. 5 is a graph showing the time change of the water level in the water receiving tank 3. In FIG. 5, first, at time t <b> 0, the control unit 20 controls the water supply valve 14 to supply water into the water receiving tank 3 through the water supply valve 14 and the water supply path 15 to a water level of 50 mm. In the period from time t0 to time t1, the rotating drum 1 is rotated while supplying water to a water level of 70 mm, so that washing water is permeated, detergent is foamed, and the like.

  Next, in the period from time t1 to time t2, the control means 20 executes the shaking process A at a water level of 70 mm. In the shaking washing process A, as shown in FIG. 6, the rotating drum 1 is rotated by a rotation angle of + 45 ° at the rotation speed of 20 r / min (right rotation as viewed from the front of the washing machine), and −45 at the same rotation speed. The repetitive operation of rotating the rotating drum 1 by the rotation angle of ° (left rotation when viewed from the front of the washing machine) is performed twice, that is, four times of washing. When the four washings are completed, the process proceeds to the reversal process, and the rotary drum 1 is rotated at a rotation angle of + 360 ° at a rotation speed of 40 r / min, i.e., one reversal drive. The vertical position is reversed. In this way, the operation of reversing once in 4 times of shaking is repeated, and the shaking process A is executed for about 3 minutes.

  Here, the control means 20 sets the rotation speed (40 r / min) of the rotating drum 1 in the reversing process higher than the rotation speed (20 r / min) of the rotating drum 1 in the shaking process. This is because in the shaking process, the clothes are prevented from being damaged and the washing liquid penetrates the entire clothes, whereas in the inversion process, the clothes are reliably hooked on the protruding plate 6 and the clothes are inverted. .

  When the shaking process A is completed, during the period from time t2 to time t3, the control means 20 controls the water supply valve 14 so that the water level in the water receiving tank 3 is 90 mm via the water supply valve 14 and the water supply path 15. Water is supplied until it is detected by the water level detection means 16.

  When the water level reaches 90 mm, the control means 20 executes the shaking process B at the water level of 90 mm during the period from time t3 to time t4. In the shaking washing process B, as shown in FIG. 6, the rotating drum 1 is rotated by a rotation angle of + 45 ° at a rotation speed of 20 r / min, as in the shaking washing process A (right rotation as viewed from the front of the washing machine). Then, the repetitive operation of rotating the rotary drum 1 by the same rotation speed by a rotation angle of −45 ° (rotating counterclockwise when viewed from the front of the washing machine) is performed twice, that is, four times of washing. When the four washings are completed, the process proceeds to the reversal process, and the rotary drum 1 is rotated at a rotation angle of + 360 ° at a rotation speed of 40 r / min, i.e., one reversal drive. The vertical position is reversed. In this manner, the operation of inversion once in 4 times of shaking is repeated, and the shaking process B is executed for about 3 minutes.

  In FIG. 6, the inversion period in the shaking process A and the inversion period in the shaking process B are set to be the same, such as one inversion every 4 times, and in the shaking process A, for example, The reversal cycle may be set to 4 reversals and the reversal cycle may be set to 1 reversal.

  When the shaking process B is completed, during the period from time t4 to time t5, the control means 20 controls the water supply valve 14 so that the water level in the water receiving tank 3 is 110 mm through the water supply valve 14 and the water supply path 15. Water is supplied until it is detected by the water level detection means 16.

  When the water level reaches 110 mm, the control means 20 executes the shaking process C at a water level of 110 mm during a period from time t5 to time t6. In the shaking washing process C, as shown in FIG. 6, the rotating drum 1 is rotated by a rotation angle of + 45 ° at the rotation speed of 20 r / min (right rotation as viewed from the front of the washing machine), and −45 at the same rotation speed. The repetitive operation of rotating the rotary drum 1 by the rotation angle of ° (left rotation when viewed from the front of the washing machine) is performed four times, that is, eight times of washing. When the eight shakings are completed, the process proceeds to the reversal process, and the rotary drum 1 is rotated at a rotation angle of + 360 °, ie, one rotation reversal at a rotation speed of 40 r / min, and the garment is hooked on the projection plate 6 to The vertical position is reversed. In this manner, the operation of reversing once every eight shakings is repeated, and the shaking process C is performed for about 3 minutes.

  Thus, in the shaking process C with a water level of 110 mm, the cycle of the inversion process is 1 inversion every 8 times of shaking, and in the 4 times of shaking in the shaking process B with a water level of 90 mm, compared to 1 inversion. The cycle of the reversal process is set to be long. This means that the higher the water level, the greater the effect of the washing liquid penetrating into the clothing, and the longer the cycle of reversal and the greater the number of shakes, the more effective it is without damaging the clothing such as fabric damage or shrinkage. This is to realize a proper washing.

  When the shaking process C is completed, during the period from time t6 to time t7, the control means 20 controls the water supply valve 14 so that the water level in the water receiving tank 3 is 130 mm through the water supply valve 14 and the water supply path 15. Water is supplied until it is detected by the water level detection means 16.

  When the water level reaches 130 mm, in the period from time t7 to time t8, the control means 20 executes the shaking process D at the water level of 130 mm. In the shaking washing process D, as shown in FIG. 6, as in the shaking washing process C, the rotating drum 1 is rotated by a rotation angle of + 45 ° at a rotation speed of 20 r / min (right rotation as viewed from the front of the washing machine). Then, the repetitive operation of rotating the rotary drum 1 at the same rotation speed by a rotation angle of −45 ° (rotating left when viewed from the front of the washing machine) is performed four times, that is, eight times of washing. When the eight shakings are completed, the process proceeds to the reversal process, and the rotary drum 1 is rotated at a rotation angle of + 360 °, ie, one rotation reversal at a rotation speed of 40 r / min, and the garment is hooked on the projection plate 6 to The vertical position is reversed. In this way, the operation of reversing once in 8 times of shaking is repeated, and the shaking process D is executed for about 3 minutes.

  In FIG. 6, the inversion period in the shaking process C and the inversion period in the shaking process D are set to be the same, such as one inversion every 8 times, but in the shaking process C, for example, An inversion cycle of 8 inversions may be set, and in the shaking process D, an inversion cycle of 10 inversions and 1 inversion may be set.

  When the shaking process D is completed, during the period from time t8 to time t9, the control means 20 controls the water supply valve 14 so that the water level in the water receiving tank 3 is the highest via the water supply valve 14 and the water supply path 15. Water is supplied until the water level detecting means 16 detects that the water level has reached 150 mm.

  When the water level reaches 150 mm, which is the highest water level, the control means 20 executes the shaking process E at a water level of 150 mm during a period from time t9 to time t10. In the shaking washing process E, as shown in FIG. 6, execution of the reversing process is prohibited, and the rotating drum 1 is rotated by a rotation angle of + 45 ° at a rotation speed of 20 r / min (right rotation as viewed from the front of the washing machine). Then, only the repetitive operation of rotating the rotary drum 1 by the same rotation speed by a rotation angle of −45 ° (left rotation as viewed from the front of the washing machine) is repeated for about 3 minutes.

  In this way, in the shaking process E with a water level of 150 mm, which is the highest level, by prohibiting the execution of the reversing process, the washing liquid can be washed by shaking without damaging the cloth such as fabric damage or shrinkage. Effective washing can be realized only by the penetration of water.

  When the shaking process E ends, the control means 20 controls the drain valve 13 to drain the water from the water receiving tank 3 through the drain path 12 and the drain valve 13.

  As described above, the shaking process in five stages is performed.

  In the shaking washing processes A to D, there is a pause time of about 10 seconds after the inversion process is completed. This is to further infiltrate the washing liquid into the clothes pulled up from the washing liquid in order to reverse the vertical position of the clothes.

  FIG. 7 is a timing chart showing the change in the number of inversions according to the amount of clothes in the shaking processes A and B of FIG. As shown in FIG. 7, when the amount of cloth detected by the cloth amount detecting means 30 is small (cloth amount (small)), the inversion is performed once every four times of shaking as in the sequence of FIG. However, when the amount of cloth detected by the cloth amount detecting means 30 is medium (the amount of cloth (medium)), the cloth is detected by the amount detecting means 30 after two reversals are performed four times. When the amount is large (the amount of cloth (large)), the inversion is performed 4 times for 4 times of shaking. The greater the amount of laundry, the greater the unevenness of washing. Therefore, by increasing the number of inversions, it is possible to perform optimal washing according to the amount of clothing.

  Also, in the reversing process, when the amount of laundry is large, the clothing is reliably reversed by increasing the number of rotations of the rotating drum 1, and conversely, when the amount of laundry is small, the rotating drum 1 rotates. By reducing the number, damage to clothing can be prevented.

  In the present embodiment, the washing process has been described. However, the present invention can also be applied in the rinsing process, and effective rinsing can be realized without damaging the clothing such as fabric damage or shrinkage. Can do.

  In the present embodiment, the case where a DC brushless motor is used as the motor 5 is illustrated and described. However, the present invention is not limited to this, and for example, a DC brush motor or an induction motor is used, and its driving means and method. Even if it changes, this invention can be applied and the same effect as this invention is acquired.

  In addition, other configurations described in the present embodiment and the number of stages of the shaking process in the dry course, the set water level, the set rotation angle, the set rotation speed, the setting time, the number of repetitions of the shaking process, the number of times of inversion of the inversion process, etc. Is merely an example, and modifications and variations thereof are also included in the present invention based on the technical concept of the claims.

  The washing machine according to the present invention can gently wash a delicate garment such as wool or silk without causing damage such as fabric damage or shrinkage, and can enhance the washing effect without causing uneven washing. And is useful for a rotary drum type washing machine or the like.

Sectional drawing which shows one structural example of the washing machine which concerns on one embodiment of this invention 1 is a circuit diagram showing a configuration example of the control device 19 of FIG. 2 is a block diagram showing an internal configuration of rotation control means 35 included in the control means 20 of FIG. Top view of the operation panel including the input setting means 21 of FIG. The graph which shows the time change of the water level in the dry course of the washing machine which concerns on one embodiment of this invention. Timing chart showing the change of the inversion period according to the water level, corresponding to the shaking steps A to E of FIG. FIG. 6 is a timing chart showing the change in the number of inversions according to the amount of clothes in the shaking processes A and B of FIG.

Explanation of symbols

1 Rotating drum 2 Water passage hole 3 Water receiving tank 4 Rotating shaft (Rotating center shaft)
DESCRIPTION OF SYMBOLS 5 Motor 6 Protruding plate 7 Cover body 8 Clothes entrance / exit 9 Washing machine main body 10 Spring body 11 Damper 12 Drainage path 13 Drainage valve 14 Water supply valve (water supply means)
15 Water supply route (water supply means)
DESCRIPTION OF SYMBOLS 16 Water level detection means 17 Blower fan 18 Heater 19 Control apparatus 20 Control means 21 Input setting means 22 Display means 23 Load drive means 24 Position detection means 25 Drive circuit 26 Inverter 27 Current detection means 30 Cloth amount detection means 31 Commercial power supply 32 Diode bridge 33 Choke coil 34 Smoothing capacitor 35 Rotation control means

Claims (6)

A rotating drum for storing laundry and having a central axis of rotation in the horizontal or inclined direction; a water receiving tub that encloses the rotating drum and elastically supports the washing machine body; a motor that drives the rotating drum; A water supply means for supplying water into the water receiving tub, a water level detecting means for detecting the water level in the water receiving tub, an input setting means for setting the operation of the washing machine, and a washing operation set by the input setting means. A washing machine comprising control and control means for controlling the water supply means and the motor,
The control means controls the water supply means to raise the water level stepwise in the washing process according to the setting by the input setting means, controls the motor, and sets the rotation angle of the rotary drum to 180 degrees. A swing washing process for controlling the rotation in the forward direction and the reverse direction at a smaller angle, and a reversing process for controlling the rotation angle of the rotating drum to 180 degrees or more intermittently in the middle of the shaking process, The washing machine according to claim 1, wherein the cycle of performing the reversing process is set longer as the water level detected by the water level detection means becomes higher . Wherein, the washing machine according to claim 1 wherein the set higher than the rotational speed of the rotary drum in the swing-washing step the rotational speed of the rotary drum in the reversing stroke. The washing machine further includes a laundry amount detecting means for detecting the laundry weight of the laundry, the control means, the more the laundry amount sensed by the laundry amount detecting means, to increase the number of reversals of the inverting step The washing machine according to claim 1 or 2 . The control means increases the rotation speed of the rotating drum in the reversing process when the cloth amount detected by the cloth amount detection means is large , and decreases the rotation speed of the rotating drum when the cloth amount is small. Item 4. A washing machine according to Item 3 . The washing machine according to any one of claims 1 to 4 , wherein the control means provides a rest time after the reversing process.   2. The washing machine according to claim 1, wherein when the water level detected by the water level detection unit reaches a maximum water level, the control unit prohibits execution of the inversion process.

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