JP2005143792A - Washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To dissolve the unbalanced state of clothes by stopping a drainage means and safely operate a washing machine without abnormal vibration when the number of times of determining the imbalance of the clothes reaches a predetermined number of times in the washing machine washing, rinsing and spin-drying in a rotating drum. <P>SOLUTION: This washing machine executes washing, rinsing and spin-drying in the rotating drum having a rotating axis in the horizontal direction or an inclined direction. The control means sequentially executes a step of normally/inversely rotating the rotating drum several times and loosening laundry; a cloth balance step of starting up the rotating drum from a substantially stationary state to a first predetermined rotation speed and making the laundry stick to the inside of the rotating drum; and a first cloth balance determining step of determining the balance state of the clothes by the first predetermined rotation speed. When the number of times of determining the imbalance state reaches the predetermined number of times, the drainage means is made to stop. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a 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 washing machine has a rotating drum that stores laundry and can rotate around a horizontal axis in a water receiving tub. Is started, the water drum is supplied to a predetermined water level, and then the rotating drum is driven. The laundry stored in the rotating drum by the rotation of the rotating drum is hooked on the stirring protrusion provided on the inner peripheral surface of the rotating drum, lifted in the rotating direction, and dropped from an appropriate height. Washing is done with the action of tapping.

  After this washing process, the washing water is drained, water is newly supplied and a rinsing process is executed. When the rinsing process is completed, a dehydration process is performed in which the rotating drum is rotated at a high speed. Each of these steps is executed based on a predetermined control procedure.

The above configuration is a general configuration of a washing machine having a rotating drum that can rotate around a horizontal axis, and in addition to the above configuration, in order to suppress the occurrence of vibration and noise during the dehydration process, When the state is determined and it is determined that the balance is unbalanced, a washing machine has been proposed that corrects the unbalanced state of the laundry in the drum (see, for example, Patent Document 1).
JP-A-10-272285

  However, in such a conventional configuration, in order to keep the cloth unbalance judgment value low in order to suppress vibration and noise, the unbalance state is not corrected in the cloth type and the cloth amount, and the unbalance is corrected. Repeatedly, the washing time becomes longer. Or there was a problem that dehydration did not end due to an abnormal notification.

  The present invention solves the above-described conventional problems, and when the number of times that the cloth is in a poor balance state reaches a predetermined number of times, water is accumulated in the inclined water receiving tank by stopping the drainage means, and the rotation Since the water in the back part of the drum absorbs water evenly and rotates, it becomes a donut shape, so the center of gravity of the water receiving tub is moved backward to bring it closer to the center of gravity of the product, eliminating the poor balance of the fabric The purpose is to improve the safety of the product at the start of dehydration.

  In order to achieve the above object, the present invention provides a rotating drum having a rotation center axis in a horizontal direction or an inclined direction, a water receiving tank elastically supported by a washing machine body and containing the rotating drum, and the water receiving tank Drainage means for draining the water in the interior, a motor for driving the rotating drum, an inverter having a switching element for supplying power to the motor, and controlling the switching element of the inverter to control the driving of the motor Control means for controlling the drainage means, the control means for rotating the rotating drum forward and backward several times to loosen the laundry, and from the substantially stationary state to the first predetermined number of rotations And a first cloth balance determination step for determining the balance state of the fabric at a first predetermined number of rotations. Perform the following, if the number of times the fabric of balance condition is determined to be bad it has reached the predetermined number of times, which is the washing machine so as to stop the water discharge means.

  As a result, water accumulates in the inclined water receiving tub, and evenly absorbs and rotates the laundry in the back part of the rotating drum to form a donut shape, so that the cloth imbalance can be corrected and the water receiving By moving the center of gravity of the tank back and bringing it closer to the center of gravity of the product, dehydration can be started by suppressing abnormal vibrations of the rotating drum and the water receiving layer, and the safety of the product can be improved.

  In the washing machine of the present invention, when the number of times that it is determined that the cloth is not well balanced reaches a predetermined number of times, water is collected in the inclined water receiving tub by stopping the drainage means, and in the back part of the rotating drum. Since a uniform laundry absorbs and rotates into a donut shape, the cloth imbalance can be corrected, and the center of gravity of the water receiving tub can be moved backward to approach the center of gravity of the product. Dehydration can be started by suppressing abnormal vibration of the receiving tank, and the safety of the product can be improved.

  According to a first aspect of the present invention, there is provided a rotating drum having a rotation center axis in a horizontal direction or an inclination direction, a water receiving tank elastically supported by a washing machine body and containing the rotating drum, and draining water in the water receiving tank. Draining means, a motor for driving the rotating drum, an inverter having a switching element for supplying electric power to the motor, and controlling the switching element of the inverter to control driving of the motor and control the draining means And a control means for rotating the rotating drum forward and backward several times to loosen the laundry, and raising the rotating drum from a substantially stationary state to a first predetermined rotation speed for washing. A cloth balancing process for sticking an object in the rotating drum and a first cloth balance determining process for determining the cloth balance state at a first predetermined number of revolutions are sequentially performed, and the cloth balun When the number of times determined to be bad reaches a predetermined number of times, the drainage means is stopped, so that water accumulates in the inclined water receiving tub, and evenly on the laundry in the back part of the rotating drum. Since it absorbs and rotates into a donut shape, the cloth imbalance can be corrected, and the center of gravity of the water receiving tub is moved backward to bring it closer to the center of gravity of the product, thereby causing abnormal vibration of the rotating drum and the water receiving layer. It is possible to suppress dehydration and to improve the safety of the product.

  In a second aspect based on the first aspect, the control means determines the balance state of the cloth at the dehydration step of raising the rotary drum to the second predetermined rotational speed and dewatering and the second predetermined rotational speed. The cloth balance determination process of No. 2 is performed after the cloth balance process at the first predetermined rotational speed, so that water contained in the cloth is reduced and the cloth balance state is better than that of the first invention. Correction can be made, and dehydration can be started by moving the center of gravity of the water receiving tank back to bring it closer to the center of gravity of the product, thereby improving the safety of the product.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the control means performs a step of determining a large shake of the water receiving tank at the start of dehydration to the third predetermined rotation speed, and the water receiving tank When it is determined that the runout of the water is larger than the predetermined value, the drainage means is stopped, so that the water contained in the cloth to be started up in the erroneous determination of the cloth balance is reduced and the water receiving tank is more than the first invention. Since the center of gravity can be moved backward and brought closer to the center of gravity of the product, the abnormal vibration of the rotating drum and the water receiving tank can be further suppressed, and dehydration can be started up, and the safety of the product can be improved.

  According to a fourth aspect of the present invention, in the first to third aspects of the present invention, when the number of times that the control unit determines that the cloth balance state is bad reaches a predetermined number of times, the rotational speed of the rotating drum is set as the first rotational speed. By relaxing the cloth balance criterion, the amount of water in the laundry is reduced and the amount of unbalance is reduced, so that the probability of launching dehydration can be increased.

  5th invention is provided with the water supply means which supplies water in a water receiving tank in the above-mentioned 1st-4th invention, and the control means, when the number of times determined that the cloth balance state is bad reaches a predetermined number of times, The drainage means is stopped, the water supply means is operated until the water level reaches a predetermined level, water is supplied, and the rotating drum is rotated in the normal direction. Since it becomes a donut shape by uniformly absorbing water and rotating, the balance state of the cloth is corrected, and the center of gravity of the water receiving tank can be moved backward, so that dehydration can be started by approaching the center of gravity of the product, Product safety can be improved.

According to a sixth aspect of the present invention, the control means performs a step of determining a large shake of the water receiving tank when the rotating drum is dewatered and started up to the third predetermined rotation speed, and the shake of the water receiving tank is less than a predetermined value. If it is determined that it is large, the drainage means is stopped, so that the water contained in the cloth that is raised due to the erroneous determination of the cloth balance is reduced, and the center of gravity of the water receiving tank is set behind the first invention. Since it can move and can be brought close to the center of gravity of the product, it is possible to suppress the abnormal vibration of the rotating drum and the water receiving tank and to start dehydration, and to improve the safety of the product. Will be described with reference to the drawings. In addition, the thing of the same structure as a prior art example attaches | subjects the same code | symbol, and abbreviate | omits description. Further, the present invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a partially block circuit diagram of the washing machine according to Embodiment 1 of the present invention, and FIG. 2 is a longitudinal sectional view of the washing machine.

  As shown in FIG. 2, the 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 rotating drum 1, and are rotatably disposed in the water receiving tank 3. A rotation axis (rotation center axis) 4 is provided at the rotation center of the rotary drum 1 in an inclined direction, and the axial center direction of the rotary drum 1 is inclined downward from the front side toward the back side. A motor 5 attached to the back surface of the water receiving tank 3 is connected to the rotating shaft 4 to drive the rotating drum 1 to rotate 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 can be taken in and out of the rotary drum 1 through the clothing entrance 8. ing. Since the lid body 7 is provided on the upward inclined surface, the laundry can be carried out without bending the waist.

  The water receiving tub 3 is suspended from the washing machine main body 9 by a spring body (not shown) so as to be swingable. One end of the drainage path 10 is connected to the lower part of the water receiving tub 3 and the other end of the drainage path 10 is The washing water in the water receiving tank 3 is drained by connecting to the drain valve 11. The water supply valve 12 supplies water into the water receiving tank 3 through the water supply path 13.

  A drainage groove 14 is formed in the lowermost part of the water receiving tub 3 in a direction orthogonal to the rotation direction of the rotary drum 1, and the side wall (wall part) 14 a of the drainage groove 14 has a water flow as shown in FIG. It is formed in a direction that intersects the direction.

  In the present 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 toward the back side. However, the rotating shaft 4 may be provided in the substantially horizontal direction at the rotation center of the rotating drum 1, and the axial center direction of the rotating drum 1 may be disposed in the substantially horizontal direction.

  The control device 15 is configured as shown in FIG. 1 and includes a microcomputer that controls operations of the motor 5, the drain valve 11, the water supply valve 12, and the like, and sequentially controls a series of steps of washing, rinsing, and dewatering. Control means 16 is provided. The control means 16 inputs information from the input setting means 17 for setting the driving course and the like, and displays the information on the display means 18 based on the information to inform the user, and starts the operation by the input setting means 17. Is set, the data from the water level detecting means 19 for detecting the water level in the water receiving tank 3 is input, and the operations of the drain valve 11 and the water supply valve 12 are controlled via the load driving means 20, Perform washing operation.

  At this time, the control means 16 controls the rotation of the motor 5 by controlling the inverter 23 via the drive circuit 22 based on the information from the position detection means 21 that detects the position of the rotor of the motor 5. Yes. Although the motor 5 is a direct current brushless motor, although not shown, it is composed of a stator having a three-phase winding and a rotor having a two-pole permanent magnet disposed on the ring, and the stator has a three-phase winding. The first winding 5a, the second winding 5b, the third winding 5c and the like are wound around an iron core provided with a slot.

  The inverter 23 is composed of a switching element composed of a parallel circuit of a power transistor (IGBT) and a reverse conducting diode. A series circuit of a first switching element 23a and a second switching element 23b, a series circuit of a third switching element 23c and a fourth switching element 23d, and a fifth switching element 23e and a sixth switching element 23f A series circuit is configured, and the series circuit of each switching element is connected in parallel.

  Here, both ends of the series circuit of the switching elements are input terminals, connected to a DC power source, and output terminals are respectively connected to connection points of two switching elements constituting the series circuit of the 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 turning on and off the two switching elements constituting the series circuit of the switching element. The three states are positive voltage, zero voltage, and release, respectively.

  On / off of the switching element is controlled by the control means 16 on the basis of information from the three position detection means 21a, 21b, and 21c made of the Hall IC. The position detection means 21a, 21b, and 21c 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 21a, 21b, and 21c each output a pulse at an electrical angle of 120 degrees. The control means 16 detects when the signal state of any of the three position detection means 21a, 21b, 21c changes, and based on the signals of the position detection means 21a, 21b, 21c, the switching elements 23a-23f 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, and the third winding of the stator. The coil 5c is energized to create a magnetic field and rotate the rotor.

  Further, the switching elements 23a, 23c, and 23e are each controlled by pulse width modulation (PWM), for example, by controlling the energization ratio of high and low at a repetition frequency of 10 kHz to control the rotational speed of the rotor, The control means 16 detects the cycle whenever the signal state of any of the three position detection means 21a, 21b, 21c changes, calculates the rotor rotation speed from the cycle, and sets the rotation speed to the set rotation speed. The switching elements 23a, 23c, and 23e are PWM-controlled.

  The torque detection means 24 comprises a resistor 25 connected to one input terminal of the inverter 23 and a current detection circuit 26 connected to the resistor 25, and detects the input current value of the inverter 23 and converts it into a voltage signal. The voltage signal is input to the control means 16. Further, the control means 16 performs A / D conversion on the input voltage signal and performs arithmetic processing as digital data. 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 23 by the current detection circuit 26 connected to the resistor 25. be able to.

  The cloth amount detecting means 27 detects the amount of laundry in the rotating drum 1 and is rotated by a signal from the torque detecting means 24 when the rotating drum 1 is raised to a predetermined rotational speed (for example, 200 r / min). The amount of laundry in the drum 1 is detected.

  The commercial power source 28 is connected to the inverter 23 via a DC power source conversion device including a diode bridge 29, a choke coil 30, and a smoothing capacitor 31. However, this is an example, and the configuration of the DC brushless motor 5, the configuration of the inverter 23, and the like are not limited thereto.

  As shown in FIG. 3, the input setting means 17 includes a washing time setting switch 17a for setting the washing time, a rinsing frequency setting switch 17b for setting the rinsing frequency, a dehydration time setting switch 17c for setting the dehydration time, and a course setting switch 17d. , A start / pause switch 17e, a power-on switch 17f, a power-off switch 17g, etc., and the display means 18 includes a washing time display section 18a, a rinse count display section 18b, a dehydration time display section 18c, and a course setting display section 18d. And a detergent amount display portion 18e, a remaining time display portion 18f, a number display portion 18g, and the like.

  Here, the control means 16 performs a cloth unwinding process that repeats normal rotation / reversal (for example, 35 r / min) and then moves the rotating drum 1 from a substantially stationary state to a first predetermined rotation speed (for example, 90 r / min). 1) to determine the balance state of the cloth from the unevenness of rotation of the rotating drum 1 while the voltage is kept constant at the first predetermined number of rotations. The cloth balance determination process and the second predetermined rotation speed (for example, 160 r / min) are raised, and then the voltage is controlled at the second predetermined rotation speed to determine the cloth balance state from the rotation unevenness of the rotating drum. A second cloth balance determination process is performed, and dewatering is performed in a well-balanced state of the cloth.

  In addition, when the control means 16 determines that the cloth balance state is bad in the first or second cloth balance determination process, the control means 16 starts over from the cloth unwinding process, and the cloth is determined in the first or second cloth balance determination process. The drain valve 11 is closed when the number of times that the balance state is bad reaches a predetermined number (for example, 6 times).

  The operation and action according to the first to third aspects of the above configuration will be described with reference to FIG. In step 100 of FIG. 4, the dehydration process is started. In step 101, the data is initialized (N = 1), and then in step 102, the motor 5 is driven to rotate forward / reversely (for example, 35r / The cloth unraveling process is repeated 3 times in min).

  Thereafter, in step 103, the cloth balancing process is started, the rotating drum 1 is rotated forward to start up from a substantially stationary state to a first predetermined rotation speed (90 r / min), and the laundry is stretched in the rotating drum 1. I will attach it. That is, by rotating the rotating drum 1 gradually from a substantially stationary state to a first predetermined rotational speed (90 r / min), the laundry is rotated so that the centrifugal force is greater than the gravity acting on the laundry. Stick in the drum 1. For example, after the rotational speed of the rotating drum 1 is controlled to be constant at 35 r / min for the first 5 seconds, the rotational speed of the rotating drum 1 is controlled to 90 r / min by accelerating by 3 r / min per second.

  Next, in the first cloth balance determination process in step 104, the balance state of the cloth in the rotary drum 1 is determined at the first predetermined rotation speed (90 r / min). That is, when the voltage applied to the motor 5 is fixed so that the rotational speed of the rotating drum 1 can be kept constant at 90 r / min, the rotational speed fluctuation is measured, and when the rotational speed fluctuation is larger than a predetermined value, It is determined that the sticking state is bad and the balance state is bad.

  If it is determined in step 104 that the cloth is in a poor balance state, the rotary drum 1 is stopped in step 106 through step 105, 1 is added to N in step 107, and the process returns to step 102 to start over from the cloth unwinding process. Thus, the operation from step 102 to step 107 is repeated. Here, when the number of times that the cloth balance state is determined to be bad in the cloth balance determination process reaches a predetermined number (6 times), that is, when N = 6 in Step 105, the process proceeds to Step 108, and the drain valve 11 is turned on. Closed.

  At that time, the washing water contained in the cloth starts to accumulate in the water receiving tub 3. After passing through step 109, the rotary drum 1 is stopped in step 106, and the process returns to step 102 to start again from the cloth unwinding process. At that time, water accumulates at the bottom of the water receiving tub 3 inclined (for example, 30 °), and evenly absorbs water into the laundry in the back part of the rotating drum 1 and rotates, so that the cloth imbalance is corrected, Moreover, since the center of gravity of the water receiving tank 3 moves backward and approaches the center of gravity of the product body 9, abnormal vibrations of the rotating drum 1 and the water receiving tank 3 can be reduced, dehydration can be started up, and product safety Can also be improved.

  On the other hand, if it is determined in step 104 that the cloth balance is good, the rotational speed of the rotary drum 1 is set to a second predetermined rotational speed (160 r / min) greater than the first predetermined rotational speed (90 r / min) in step 110. min). For example, acceleration is performed at 13 r / min per second and the rotational speed of the rotating drum 1 is increased to 160 r / min and then controlled for 5 seconds. During this time, part of the water contained in the laundry is dehydrated and drained outside the machine through the open drain valve 11. Here, a part of the water contained in the laundry is dehydrated in order to perform subsequent cloth balance determination with higher accuracy.

  Thereafter, in step 111, the cloth balance state is determined in the same manner as in step 104. If the cloth balance state is determined to be poor, the process proceeds to step 105. After that, the contents are the same as described above, and the explanation is omitted. However, when the drain valve 11 is stopped, water accumulates at the bottom of the water receiving tank 3 inclined (for example, 30 °), and the back of the rotating drum 1 Since the laundry in the portion of the water is uniformly absorbed and rotated, the balance of the cloth is corrected, and the center of gravity of the water receiving tub 3 moves rearward and approaches the center of gravity of the product main body 9, so that the rotating drum 1 In addition, dehydration can be started by reducing abnormal vibration of the water receiving tank 3 and the safety of the product can be improved.

  If it is determined in step 111 that the cloth is well balanced, the rotational speed of the rotary drum 1 is set to a third predetermined rotational speed (400 r / min) larger than the first and second predetermined rotational speeds in step 112. Launch. In the process of step 112, the vibration occurs due to the resonance between the rotary drum 1 and the product main body 9 in the vicinity of 300 r / min. If the change in the rotational speed at the time of the passage is small, the cloth balance is poor in step 113. And the process proceeds to step 105. The subsequent contents are the same as described above.

  If it is determined in step 113 that the cloth is in a good balance state, the third predetermined rotation speed is continued for 1 minute in step 114, the process proceeds to a dehydration process (eg, 900 r / min) in step 115, and in step 116. It operates for a predetermined time and dehydrates.

  Next, even if the drain valve 11 is stopped in step 109, the cloth unbalanced state is not solved, and redoing is repeated a predetermined number of times (8 times), that is, when N = 8, the cloth unbalanced state is reached. Therefore, the control means 16 determines that there is an abnormality, displays the abnormality on the display means 18, and notifies the user of the abnormality.

(Embodiment 2)
Next, the operation and action of the second embodiment according to the fourth invention will be described with reference to FIG. The configuration of the washing machine and steps 100 to 117 of the operation flow are the same as those in the first embodiment, and the same numbers are given and the description is omitted.

  In step 105, if the unbalanced state of the cloth is not solved and the redoing reaches a predetermined number of times (six times), the water contained in the laundry is discharged, and the total weight of the cloth amount and the water content Since the abnormal vibration of the rotating drum 1 and the water receiving tub 3 due to the unbalance of the laundry is reduced, it is easy to start the determination value of the cloth balance state in Step 118, and then the drain valve in Step 108. 11 is opened, the process passes through step 109, the rotary drum 1 is stopped in step 106, the process returns to step 102, and the process starts again from the cloth unwinding process.

  At that time, water accumulates at the bottom of the water receiving tub 3 inclined (for example, 30 °), and evenly absorbs water and rotates in the laundry in the back part of the rotating drum 1, so that the center of gravity of the water receiving tub 3 is behind. Since the cloth unbalance amount is reduced and the cloth unbalance determination value is easily changed, the probability of dehydration start-up can be increased.

(Embodiment 3)
Next, the operation and action of the third embodiment according to the fifth invention will be described with reference to FIG. Components having the same configuration, operation, and action as those of the first embodiment are given the same numbers, and description thereof is omitted.

  After the dehydration process is started in step 100 and data initialization (N = 1, D = 1) is performed in step 101, steps 102 to 116 are the same operation.

  In step 109, even if the drain valve 11 is stopped, the cloth unbalanced state is not solved, and redoing is repeated a predetermined number of times (eight times), that is, when N = 8, the cloth unbalanced state cannot be corrected. In step 119, the rotary drum 1 is stopped. In step 120, the water supply valve 12 is turned on in step 121, and water is supplied to the water receiving tank 3 through the water supply path 13.

  At this time, since the rotating drum 1 is rotating at the third predetermined rotation speed, the laundry in the rotating drum 1 is lifted in the rotation direction by the projection plate 6 provided on the inner wall surface of the rotating drum 1, When it moves to a height position where its own weight is greater than the inertia and centrifugal force accompanying rotation, it falls onto the lower inner peripheral surface of the rotating drum 1.

  In step 122, when the water level detected by the water level detection means 19 reaches the predetermined water level (water column 100 mm), the process proceeds to step 123, the water supply valve 12 is turned off to stop the water supply, and the rotating drum 1 is rotated at the third predetermined rotational speed. Corrected rinsing that repeats normal rotation and reversal is performed for a predetermined time (for example, 2 minutes), the laundry is separated, and the unevenness of the laundry is corrected to stop the drain valve 11 again. By doing so, water accumulates at the bottom of the inclined water receiving tub 3, and evenly absorbs water and rotates in the laundry in the back part of the rotating drum 1, so that the balance of the cloth is corrected and the water receiving Since the center of gravity of the tank 3 moves rearward and approaches the center of gravity of the product main body 9, dehydration can be started up by reducing abnormal vibration of the rotating drum 1 and the water receiving tank 3, and the safety of the product is improved. Can do.

  Next, in step 124, the drain valve 11 is opened and the rinsing water in the water receiving tank 3 is drained to the outside of the machine. In step 125, 1 is added to D and the process returns to step 106. Repeat the rotation process.

  In step 120, even if the drain valve 11 is stopped, or if the cloth is unbalanced even if the rinse is corrected and the laundry is separated, it is determined that the cloth unbalance state cannot be corrected, The abnormality is displayed on the display means 18.

  As described above, in the washing machine according to the present invention, when the cloth imbalance state is not resolved even after the cloth balance determination is repeated a predetermined number of times, the draining means is stopped, so that the inclined water receiving tub is stopped. Since water accumulates and evenly absorbs and rotates into the laundry in the back part of the rotating drum, it becomes a donut shape, so that the center of gravity of the water receiving tub can move backward and approaches the center of gravity of the product. Since the poor balance state can be eliminated, dehydration can be started up, there is no abnormal vibration, and it can operate safely, so washing, rinsing, in a rotating drum having a central axis of rotation in the horizontal or inclined direction, It is useful as a washing machine that dehydrates.

FIG. 2 is a partial block diagram of the washing machine according to Embodiment 1 of the present invention. Longitudinal section of the washing machine Enlarged front view of input setting means and display means of the washing machine Operation flowchart of the washing machine Operation flow chart of washing machine of embodiment 2 of the present invention Operation flowchart of washing machine of embodiment 3 of the present invention

Explanation of symbols

1 Rotating drum 3 Water receiving tank 4 Rotating axis (Rotating center axis)
5 Motor 9 Washing machine body 11 Drain valve (drainage means)
12 Water supply valve (water supply means)
16 Control means 19 Water level detection means 23 Inverter 23a-23f Switching element

Claims (6)

A rotating drum having a central axis of rotation in a horizontal direction or an inclined direction, a water receiving tank elastically supported by a washing machine body and enclosing the rotating drum, drainage means for draining water in the water receiving tank, A motor for driving the rotating drum; an inverter having a switching element for supplying electric power to the motor; and a control means for controlling the draining means while controlling the driving of the motor by controlling the switching element of the inverter. The control means is configured to reverse the rotating drum forward and forward several times to loosen the laundry, and raise the rotating drum from a substantially stationary state to a first predetermined rotational speed to bring the laundry into the rotating drum. If the cloth balance state is poor, the cloth balance process for sticking and the first cloth balance determination process for determining the cloth balance state at the first predetermined rotational speed are sequentially performed. If boss was count has reached the predetermined number of times, the washing machine so as to stop the water discharge means. The control means includes a dehydration process for raising the rotating drum to a second predetermined rotation speed and dewatering, and a second cloth balance determination process for determining the cloth balance state at the second predetermined rotation speed. The washing machine according to claim 1, wherein the washing is performed after the cloth balancing step at the number of rotations. The control means performs a process of determining a large shake of the water receiving tank at the time of dehydration startup to the third predetermined rotation speed, and stops the draining means when it is determined that the shake of the water receiving tank is larger than a predetermined value. The washing machine according to claim 1 or 2, wherein: The washing machine according to any one of claims 1 to 3, wherein the control means loosens the cloth balance criterion when the number of times that the cloth is in a poor balance state reaches a predetermined number. The water supply means is provided with water supply means for supplying water into the water receiving tank, and the control means stops the drainage means when the number of times determined that the cloth balance state is bad reaches a predetermined number of times, and keeps the water supply means until a predetermined water level is reached. The washing machine according to any one of claims 1 to 4, wherein the washing machine is operated to supply water and to perform forward and reverse repetitive operations of the rotating drum. A rotating drum having a central axis of rotation in a horizontal direction or an inclined direction, a water receiving tank elastically supported by a washing machine body and enclosing the rotating drum, drainage means for draining water in the water receiving tank, A motor for driving the rotating drum; an inverter having a switching element for supplying electric power to the motor; and a control means for controlling the draining means while controlling the driving of the motor by controlling the switching element of the inverter. The control means performs a process of determining a large shake of the water receiving tank at the time of dehydration startup of the rotating drum to the third predetermined rotation speed, and determines that the shake of the water receiving tank is greater than a predetermined value. In this case, the washing machine is adapted to stop the drainage means.

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