JP2003135882A - Drum type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum type washing machine capable of saving the time of washing which may be prolonged due to imbalance in a drum. SOLUTION: In the drum washing machine, a determination is made as to whether or not an eccentric load on a rotating shaft has exceeded a predetermined value during spinning of the drum (S3); if the load is determined to have exceeded the predetermined value (S3) during intermediate spinning (S2 to 5) associated with rinsing, the intermediate spinning (S2 to 5) is performed again; when the load is determined to have exceeded the threshold (S3) K times (S10), then rinsing (S6) is performed and the intermediate spinning (S2 to 5) is performed again; after the intermediate spinning (S2 to 5) is performed L times (S7), the final spinning is performed. When a determining means (S3) determines that a predetermined value has been exceeded during the final spinning, the final spinning is performed again; when the predetermined value is determined to have been exceeded M times, an alarm is issued. When the predetermined value is determined to have been exceeded (S3) K times (S10) during the intermediate spinning (S2 to 5), then the number M is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a drum type washing machine having a drum which accommodates an article to be washed and which rotates in a water tub about a horizontal rotation axis. It relates to detection and its control.

[0002]

2. Description of the Related Art A conventional drum-type washing machine has a structure in which two springs 5 are suspended inside an outer box 1 as shown in a schematic partial sectional view of FIG. 1 and an inner front view of FIG. It has a double structure of a water tank 2 having a bottom cylindrical shape and a drum 3 provided inside the water tank 2 so as to rotate around a horizontal rotation axis.

The water tank 2 absorbs vibrations during operation,
As described above, it is suspended from the diagonally upper side by the two springs 5, and is supported by the two vibration damping dampers 6 from the diagonally lower side, and has a function of storing and discharging the washing liquid and the dehydrated liquid. There is. The drum 3 is provided with a large number of small holes 4 on its entire peripheral surface for passing water supply during washing and drainage during dehydration, and an inner peripheral surface thereof for lifting an article to be washed and dropping it. In, three baffles 17 are arranged.

A motor 10 for rotating the drum 3 is provided on the outer bottom surface of the water tank 2, and its rotation shaft 10a penetrates the bottom portion of the water tank 2 and is connected to the center of the bottom portion of the drum 3. A water supply pipe 18 is connected to a water supply port 14 provided at an upper portion of the water tank 2, and tap water is supplied by a water supply valve 18 which is an electromagnetic valve.
Water is supplied to the water supply pipe 18 via a.

A drainage duct 7 is connected to the lowermost part of the water tank 2 so that the laundry drainage can be drained by a drainage pump 11.
Is discharged to the outside. An operation / display unit 19 is provided on the upper surface of the outer box 1, a recess is provided on the upper surface of the outer box 1 below the operation / display unit 19, and a control circuit 20 of the drum type washing machine is embedded. There is.

In the drum type washing machine having such a structure, in the washing process, the item to be washed is put in the drum 3 and the water supply valve 18a is provided.
Open and pour tap water into tank 2. At this time, tap water is
The detergent filled in the detergent case 39 is poured into the water tank 2. When the tap water poured into the aquarium 2 reaches the predetermined water level,
The drum 3 starts to rotate at a low speed by the motor 10.

In the drum 3, tap water permeates and is contained in the article to be washed while dissolving the detergent therein. The item to be washed is
Due to the centrifugal force due to the rotation of the drum 3 and the baffle 17,
After being lifted to near the top of the drum 3, it falls by its own weight (called tumbling). By repeating this tumbling, the article to be washed is hit and washed by the impact force when falling. Drain when tumbling is complete.

FIG. 13 is a flow chart showing a rinsing process of a conventional drum type washing machine. In the rinsing step, after draining, the combination of the intermediate dehydration step and the rinsing step is performed multiple times. First, in the intermediate dewatering step, the unbalance detection execution count, which is the number of times imbalance in the drum 3 described below is detected, is cleared (S120). Next, to the extent that the object to be washed sticks to the inner peripheral surface of the drum 3, the drum 3
While rotating at low speed, the eccentric weight with respect to the rotation axis of the drum 3 is detected, it is determined whether the detected eccentric weight exceeds a predetermined value, and the imbalance in the drum 3 is detected (S
121).

If the detected eccentric weight is smaller than a predetermined value and is not unbalanced (unbalance is not excessive) (S122), the drum 3 is rotated at high speed (S123),
Intermediate dehydration is performed until the dehydration time elapses (S124).
As a method of detecting the eccentric weight with respect to the rotation axis of the drum 3, for example, there are a method based on the current value of the motor 10 and a method based on the variation in the rotation speed of the motor 10.

In the intermediate dehydration, centrifugal force generated by the high speed rotation of the drum 3 is used to press the article to be washed against the inner peripheral surface of the drum 3 to scatter the washing liquid contained in the article to be washed. At this time, the washing liquid is scattered from the small holes 4 of the drum 3, travels along the inner surface of the water tank 2, flows into the drainage duct 7, is filtered by the lint filter 13, and then is discharged from the outer box 1 by the drainage pump 11. Is discharged to.

After the dehydration time has elapsed (S124), the rinsing step (S125) is started. Rinsing process (S1
In 25), rinsing is performed in order to perform the above-described washing step for a predetermined time (a fraction of the washing step) without using a detergent. Next, the trial rinsing step (S125) is performed a predetermined number of times (for example, 4
It is judged whether or not it has already been performed (S126). If it has not been performed a predetermined number of times, the process returns to the intermediate dehydration step and the unbalance detection execution frequency count is cleared (S120). If the rinsing step (S125) has been performed a predetermined number of times (S1
26), the rinsing process is completed and the next process (final dehydration process)
Move to.

If the detected eccentric weight is larger than a predetermined value and is unbalanced (unbalance is excessive) (S122), the rotation of the drum 3 is stopped (S12).
7), 1 is added to the imbalance detection execution count (S128). Next, it is determined whether the added imbalance detection execution count (S128) is the predetermined detection count 4 (S129).
Again, while rotating the drum 3 at a low speed, the eccentric weight with respect to the rotation axis of the drum 3 is detected to detect the imbalance in the drum 3 (S121). By stopping the rotation of the drum 3 (S127), the object to be washed stuck to the top of the drum 3 falls, the distribution of the object to be washed in the drum 3 is changed, and the eccentric load is reduced. there is a possibility.

If the added imbalance detection execution count (S128) is the predetermined detection count of 4 (S12).
9) It means that even if the rotation of the drum 3 is stopped (S127), the imbalance in the drum 3 cannot be improved. If intermediate dehydration (S123, 124) is performed in this state, the equipment may be damaged. There is intermediate dehydration (S123,
124) is omitted, and the rinsing step (S125) is started.

FIG. 14 is a flow chart showing the final dewatering process of the conventional drum type washing machine. When the rinsing step is finished and the final dehydration step is performed, the unbalance detection execution count, which is the number of times the imbalance in the drum 3 is detected, is cleared, as in the rinsing step (S130). Next, while rotating the drum 3 at a low speed to the extent that the object to be washed sticks to the inner peripheral surface of the drum 3, the eccentric weight with respect to the rotation axis of the drum 3 is detected, and whether or not the detected eccentric weight exceeds a predetermined value. And the imbalance in the drum 3 is detected (S131). The detected eccentricity weight is smaller than the specified value and is not unbalanced (unbalance is not excessive)
If so (S132), the drum 3 is rotated at a high speed (S13).
3) Until the dehydration time elapses (S134), the final dehydration is performed and the process ends.

In the final dehydration, the drum 3 is used as in the intermediate dehydration.
The washing liquid contained in the object to be washed is scattered by utilizing the centrifugal force generated by the high speed rotation. The washing liquid splashes from the small holes 4 of the drum 3, travels along the inner surface of the water tank 2, flows into the drainage duct 7, is filtered by the lint filter 13, and then the drainage pump 1
1 is discharged to the outside of the outer box 1.

If the detected eccentric weight is larger than the predetermined value and is unbalanced (the imbalance is excessive) (S132), the rotation of the drum 3 is stopped (S13).
5), 1 is added to the imbalance detection execution count (S136). Next, it is determined whether the added imbalance detection execution count (S136) is the predetermined detection count 15 (S137). If the detection count is not 15, the drum 3 is rotated at a low speed again, The eccentric weight with respect to the rotating shaft of the drum 3 is detected, it is determined whether the detected eccentric weight exceeds a predetermined value, and the imbalance in the drum 3 is detected (S131). By stopping the rotation of the drum 3 (S135), the object to be washed attached to the vicinity of the top of the drum 3 falls, the distribution of the object to be washed in the drum 3 is changed, and the eccentric load is reduced. there is a possibility.

If the added imbalance detection execution count (S136) is the predetermined detection count of 15 (S1)
37), even if the rotation of the drum 3 is stopped (S135),
This means that the imbalance in the drum 3 cannot be improved. If the final dehydration (S133,134) is performed in this state, the equipment may be damaged. In this state, the final dehydration (S133,134) is also performed. Even if it does, it cannot fully dehydrate, so an alarm is output from the operation / display unit 19 to perform dehydration imbalance error processing such as notifying the user (S
138).

[0018]

In the conventional drum type washing machine, as described above, in order to reduce the vibration of the drum 3 and the water tub 2 at the time of dehydration, the unbalance is detected by the low speed rotation. Based on this, control such as shifting to high speed rotation / not shifting is performed. Since the operation of adjusting the balance of the laundry in the drum 3 is technically quite difficult, the same operation (stopping the rotation of the drum 3) is repeatedly performed, and when the balance is adjusted, the rotation shifts to high speed. The method is common. Also, because it is necessary to automatically control the washing operation to end as much as possible, the number of times imbalance detection is repeated until a dehydration imbalance error process such as outputting an alarm and notifying the user is set to a large number. Has been done.

Therefore, even in the case of washing an object to be washed whose balance cannot be corrected, such as one bath mat, after repeating the imbalance detection up to the set maximum number of times,
Since the dehydration unbalance error process is performed, the error notification is given after, for example, one hour or more than the normal washing operation time, and there is a problem that the user mistakenly thinks that it is a malfunction. Even when washing clothes with a combination of clothes whose balance is difficult to correct, the unbalance detection is repeated multiple times until the balance is adjusted, so the washing operation time becomes longer than the initial remaining time display, and the user is in trouble. There is a problem of misunderstanding that it might be.

As a technique related to such a problem of the drum type washing machine, there is a "centrifugal dehydration" for judging the amount of the article to be washed and correcting the judgment value for judging the imbalance based on the judgment result. A device is disclosed in Japanese Patent No. 3148679. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a drum type washing machine capable of shortening a washing operation time lengthened due to imbalance in a drum.

[0021]

DISCLOSURE OF THE INVENTION A drum type washing machine according to the present invention accommodates an article to be washed and rotates around a horizontal rotation axis in a water tub, and the rotation of the drum during dewatering rotation. Equipped with a determination means for determining whether the eccentric weight with respect to the axis exceeds a predetermined value, during intermediate dehydration accompanying rinsing,
When the determination means determines that the predetermined value is exceeded, after the operation for reducing the eccentric weight, intermediate dehydration is performed again, and when the determination means determines K times that the predetermined value is exceeded (K ; Arbitrary natural number), after rinsing, intermediate dehydration is performed again, and when intermediate dehydration is performed L times (L; arbitrary natural number), final dehydration is performed, and at the time of final dehydration, the determination means determines a predetermined value. When it is determined that the value is exceeded, after the above operation, the final dehydration is performed again, and when the determination means determines that the value exceeds the predetermined value M times (M; an arbitrary natural number), a drum type that outputs an alarm 1 in the washing machine during intermediate dehydration
Alternatively, when it is determined that the determination means has exceeded the predetermined value K times a plurality of times, a reducing means for reducing the M times is provided.

In this drum type washing machine, the drum accommodates the object to be washed and rotates about the horizontal rotation shaft in the water tub, and the determining means applies a predetermined eccentric load to the rotation shaft when the drum rotates for dehydration. It is determined whether the value is exceeded. At the time of intermediate dehydration accompanying rinsing, when the determination means determines that the predetermined value is exceeded, after the operation for reducing the eccentric weight,
Perform intermediate dehydration. When the determination means determines K times that the value exceeds the predetermined value, rinsing is performed, and then intermediate dehydration is performed again. When intermediate dehydration is performed L times, final dehydration is performed. When the determination means determines that the predetermined value is exceeded during the final dehydration, the final dehydration is performed again after the operation for reducing the eccentric weight, and when the determination means determines M times that exceeds the predetermined value, Output an alarm. When the determination means determines K times that the predetermined value is exceeded during the intermediate dehydration, one or more times, the reduction means reduces the M times.

With this, it is possible to discriminate the item to be washed in which the balance in the drum is difficult to be adjusted, and to inform the user that it is necessary to promptly correct the balance at the time of final dehydration only for the determined item to be washed. It is possible to shorten the washing operation time, which is lengthened due to the imbalance in the drum, and the frequency at which the user mistakenly thinks that there is a failure is reduced, and the number of telephone calls to the manufacturer is reduced.

Further, the drum type washing machine according to the present invention accommodates an article to be washed and rotates about a horizontal rotation shaft in a water tub, and an eccentric load applied to the rotation shaft when the drum rotates for dehydration. Is provided with a determination means for determining whether or not a predetermined value is exceeded, during intermediate dehydration accompanying rinsing, when it is determined that the determination means exceeds a predetermined value, after the operation for reducing the eccentric weight, When the intermediate dehydration is performed again, and the determination means determines K times that the predetermined value is exceeded, rinsing is performed, then intermediate dehydration is performed again, and when intermediate dehydration is performed L times, final dehydration is performed. During the final dehydration, when the determining means determines that the predetermined value is exceeded, the final dehydration is performed again after the operation, and when the determining means determines that the predetermined value is exceeded M times, an alarm is output. Drum type washing machine In the case of water, when the determination unit determines that the predetermined value is exceeded K times, the determination unit includes a unit that outputs an alarm when the determination again determines that the predetermined value is exceeded K times. To do.

In this drum type washing machine, similarly to the other drum type washing machines described above, intermediate dehydration and final dehydration associated with rinsing are performed and an alarm is output. During the intermediate dehydration, when the determination unit determines K times that the predetermined value has been exceeded, when the determination unit again determines that the predetermined value has been exceeded K times, the output unit outputs an alarm. As a result, it is possible to determine the laundry that is difficult to balance in the drum, and in the case of the identified laundry, it is possible to notify the user that the balance needs to be promptly corrected during intermediate dehydration. The washing operation time, which is long due to the imbalance in the drum, can be shortened and the user can
The frequency of misunderstanding that it is a malfunction decreases, and the number of phone calls to the manufacturer decreases.

Further, the drum type washing machine according to the present invention accommodates an article to be washed and rotates about a horizontal rotation shaft in a water tub, and an eccentric load on the rotation shaft when the drum rotates for dehydration. Is provided with a determination means for determining whether or not a predetermined value is exceeded, during intermediate dehydration accompanying rinsing, when it is determined that the determination means exceeds a predetermined value, after the operation for reducing the eccentric weight, When the intermediate dehydration is performed again, and the determination means determines K times that the predetermined value is exceeded, rinsing is performed, then intermediate dehydration is performed again, and when intermediate dehydration is performed L times, final dehydration is performed. During the final dehydration, when the determining means determines that the predetermined value is exceeded, the final dehydration is performed again after the operation, and when the determining means determines that the predetermined value is exceeded M times, an alarm is output. Drum type washing machine During water, one or more times, when the determination means determines K times that exceeds a predetermined value, during the final dewatering, characterized in that it comprises a means for greater the predetermined value.

In this drum type washing machine, similarly to the other drum type washing machines described above, intermediate dehydration and final dehydration associated with rinsing are performed and an alarm is output. When the determination means determines K times that the predetermined value is exceeded during the intermediate dehydration once or more times, the increasing means increases the predetermined value for the determination means to determine during the final dehydration. As a result, even in the case of a combination of clothes that is difficult to balance in the drum,
The final dehydration can be performed, and the washing operation can be ended without outputting an error notification. In addition, the washing operation time, which is lengthened due to the imbalance in the drum, can be further shortened, and the frequency of the user's misunderstanding that it is a failure is reduced, and the number of inquiries to the manufacturer is reduced.

Further, the drum type washing machine according to the present invention accommodates an object to be washed and rotates about a horizontal rotation shaft in a water tub, and an eccentric load on the rotation shaft when the drum is rotated for dehydration. Is provided with a determination means for determining whether or not a predetermined value is exceeded, during intermediate dehydration accompanying rinsing, when it is determined that the determination means exceeds a predetermined value, after the operation for reducing the eccentric weight, When the intermediate dehydration is performed again, and the determination means determines K times that the predetermined value is exceeded, rinsing is performed, then intermediate dehydration is performed again, and when intermediate dehydration is performed L times, final dehydration is performed. During the final dehydration, when the determining means determines that the predetermined value is exceeded, the final dehydration is performed again after the operation, and when the determining means determines that the predetermined value is exceeded M times, an alarm is output. Drum type washing machine During the water, the determining means, when it is judged K times that exceeds a predetermined value, during the subsequent intermediate dehydration,
It is characterized by further comprising means for increasing the predetermined value.

In this drum type washing machine, similarly to the other drum type washing machines described above, intermediate dehydration and final dehydration associated with rinsing are performed and an alarm is output. When the determination means determines K times that the predetermined value is exceeded during intermediate dehydration, the increasing means increases the predetermined value for determination by the determination means during subsequent intermediate dehydration. This makes it possible to reduce the number of unbalance detections during intermediate dehydration, even in the case of a combination of items that are difficult to balance in the drum.
The washing operation time, which is lengthened due to the imbalance in the drum, can be further shortened, the frequency with which the user mistakenly thinks that there is a failure is reduced, and the number of inquiries to the manufacturer is reduced.

Further, in the drum type washing machine according to the present invention, when the determining means determines K times that the predetermined value is exceeded during intermediate dehydration, the determining means again determines that the predetermined value is exceeded K times. When the determination is made, an output means for outputting an alarm, and when the determination means determines K times that the predetermined value has been exceeded once or more times during the intermediate dehydration, the predetermined value is increased at the final dehydration. 1 increasing means, during the intermediate dehydration, when the determining means determines K times that the predetermined value is exceeded, the second increasing means for increasing the predetermined value during the subsequent intermediate dehydration, the reducing means, the output It further comprises selection setting means for selecting one or more of the means, the first increasing means and the second increasing means and setting the selected means to operate.

In this drum type washing machine, during intermediate dehydration,
When the determination means determines K times that the predetermined value has been exceeded, when the determination means again determines that the predetermined value has been exceeded K times, the output means outputs an alarm, and during the intermediate dehydration, one or more times. When the determination means determines K times that the predetermined value is exceeded, the first increasing means increases the predetermined value for the determination means to make a larger value during the final dehydration. During the intermediate dehydration, when the determination means determines K times that the predetermined value is exceeded, the second increasing means further increases the predetermined value for the determination means to determine during the subsequent intermediate dehydration, and the selection setting means, One or more of the reducing means, the output means, the first increasing means, and the second increasing means are selected, and the selected means is set to operate. As a result, the user can select the control that accompanies the imbalance detection in the drum, and the washing operation time that is long due to the imbalance in the drum can be further shortened. The frequency of calls is reduced, and the number of inquiries to manufacturers is reduced.

Further, the drum type washing machine according to the present invention further comprises storage means for storing the contents selected and set by the selection setting means irrespective of whether the power source is off, and when the power source is on, The selection setting means sets the contents stored in the storage means.

In this drum type washing machine, the storage means stores the contents selected and set by the selection setting means regardless of whether the power source is off or not. When the power source is on, the contents stored by the storage means are stored. The selection setting means sets. This eliminates the need for the user to set the control for detecting the imbalance in the drum each time washing is performed, and the operability is improved.

Further, the drum type washing machine according to the present invention accommodates an article to be washed and rotates about a horizontal rotation shaft in a water tub, and an eccentric load applied to the rotation shaft when the drum rotates for dehydration. Is provided with a determination means for determining whether or not a predetermined value is exceeded, during intermediate dehydration accompanying rinsing, when it is determined that the determination means exceeds a predetermined value, after the operation for reducing the eccentric weight, When the intermediate dehydration is performed again, and the determination means determines K times that the predetermined value is exceeded, rinsing is performed, then intermediate dehydration is performed again, and when intermediate dehydration is performed L times, final dehydration is performed. During the final dehydration, when the determining means determines that the predetermined value is exceeded, the final dehydration is performed again after the operation, and when the determining means determines that the predetermined value is exceeded M times, an alarm is output. In the drum type washing machine Amplitude determination means for determining whether or not the amplitude of the tank is larger than a predetermined amplitude, and when the determination means determines K times that the predetermined value is exceeded during intermediate dehydration, the operation of the determination means is performed during final dehydration. When the amplitude determining means determines that the amplitude is larger than a predetermined amplitude during the final dehydration, the means for performing the final dehydration again after the operation for reducing the amplitude, and the amplitude determining means have a predetermined amplitude. When it is determined that the amplitude is larger than the amplitude M times, a unit for outputting an alarm is provided.

In this drum type washing machine, similarly to the other drum type washing machines described above, intermediate dehydration and final dehydration associated with rinsing are performed and an alarm is output. The amplitude determining means determines whether or not the amplitude of the water tank is larger than a predetermined amplitude, and when the determining means determines K times that the value exceeds the predetermined value during the intermediate dehydration, the prohibiting means determines during the final dehydration. Prohibit the operation of means. When the amplitude determining means determines that the amplitude is larger than the predetermined amplitude during the final dehydration, the final dehydration is performed again after the operation for reducing the amplitude. When the output means determines M times that the amplitude determination means is larger than the predetermined amplitude, an alarm is output.

As a result, even in the case of a combination of items to be washed in which it is difficult to balance the inside of the drum, the final dehydration can be performed and the washing operation can be ended without outputting an error notification. In addition, the washing operation time, which is lengthened due to the imbalance in the drum, can be further shortened, and the frequency of the user's misunderstanding that it is a failure is reduced, and the number of inquiries to the manufacturer is reduced.

[0037]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the drawings showing the embodiments thereof. Embodiment 1. Figure 1
[Fig. 2] is a schematic partial cross-sectional view showing the configuration of the first embodiment of a drum-type washing machine according to the present invention, and Fig. 2 is an internal front view thereof. This drum type washing machine has 2
Cylindrical water tank 2 with a bottom suspended by two springs 5
And a drum 3 provided inside the water tank 2 so as to rotate around a horizontal rotation axis.

The water tank 2 absorbs vibration during operation,
As described above, it is suspended from the diagonally upper side by the two springs 5, and is supported by the two vibration damping dampers 6 from the diagonally lower side, and has a function of storing and discharging the washing liquid and the dehydrated liquid. There is. The drum 3 is provided with a large number of small holes 4 on its entire peripheral surface for passing water supply during washing and drainage during dehydration, and an inner peripheral surface thereof for lifting an article to be washed and dropping it. In, three baffles 17 are arranged.

As shown in the external appearance of the perspective view of FIG. 3, a door 8 is provided on the front of the outer box 1 for taking in and out the laundry, and the door 8 is provided between the door 8 and the water tank 2. The water tank 2 is sealed by the packing 9 that is sandwiched. The door 8 has a transparent glass plate or a resin plate so that the inside of the drum 3 can be seen.
A motor 10 for rotating the drum 3 is provided on the outer bottom surface of the water tank 2, and a rotation shaft 10 a thereof penetrates the bottom portion of the water tank 2 and is connected to the center of the bottom portion of the drum 3.

A water supply pipe 18 is connected to a water supply port 14 provided in the upper part of the water tank 2, and tap water is supplied to the water supply pipe 18 through a water supply valve 18a which is an electromagnetic valve. The water supply pipe 18 near the water supply port 14 is provided with a detergent case 39 for presetting and pouring a required amount of detergent from the outside. A drainage duct 7 is connected to a lower portion of the water tank 2, and the laundry drainage is provided with a lint filter 1 provided in the middle of the drainage duct 7.
After being filtered at 3, it is discharged to the outside of the outer box 1 by the drainage pump 11. The lint filter 13 can be removed by opening a normally sealed lid 13a provided at the lower front portion of the outer box 1.

A pressure guiding pipe 15 is connected near the connecting portion of the drainage duct 7 with the water tank 2 via an air trap 16, and the water level in the water tank 2 is the pressure inside the air trap 16 and is the pressure guiding pipe 15. Is guided to the water level sensor 12 and detected. The water level sensor 12 detects the water level by moving a magnetic material in the coil in accordance with the pressure in the pressure guiding pipe 15 and converting the resulting change in the coil inductance into a change in the oscillation frequency.

Below the water tank 2, a safety switch 107 for determining whether or not the amplitude of the water tank 2 is larger than a predetermined amplitude.
(Amplitude determination means) is provided. An operation / display unit 19 is provided on the upper surface of the outer box 1 as shown in FIG.
A recess is provided on the upper surface of the outer case 1 below the operation / display unit 19, and a control circuit 20 of this drum type washing machine is embedded therein.

The operation / display unit 19 is, as shown in FIG.
The display device 109, the "course selection" button 104 for switching the washing method depending on the type of clothes, and the "detection switching" button 1 for switching the control associated with the imbalance detection in the drum 3.
01 (selection setting means), an alarm lamp 105 for displaying an alarm related to the detection of imbalance in the drum 3, "power supply"
Various operation buttons such as a button 103 and a “start” button 106 are provided.

FIG. 5 is a block diagram showing the configuration of the control circuit of the first embodiment of the drum type washing machine according to the present invention.
The control circuit 20 includes a microcomputer 22 as its main part, and the microcomputer 22 is
It is composed of a CPU 23, a RAM 24, a ROM 25, a timer 26, a system bus 27, a plurality of I / O ports 28, and the like. The microcomputer 22 has a power supply circuit 3
It operates by being supplied with a constant voltage from 1 to the power supply terminals Vdd and Vss, and is reset by applying a signal from the reset circuit 32 to the RESET terminal.

The CPU 23 includes a control unit 29 and an arithmetic unit 30.
The control unit 29 calls an instruction stored in the ROM 25 and executes the instruction. Arithmetic unit 3
0 executes binary addition, logical operation, increase / decrease, comparison, etc. on the data input from various input devices and the RAM 24 based on a control signal given from the control unit 29 when the instruction is executed.

The microcomputer 22 receives various operation buttons (input setting means 10) via each I / O port 28.
8) The input key circuit 33 connected to 8) and the water level sensor 1
2. Safety switch 107 and unbalance detection means 100 (determination means) for detecting the unbalanced state during dehydration
A signal is input from the state detection circuit 34 connected to
The display device drive circuit 3 is operated based on these signals.
5, a signal is output to the buzzer drive circuit 36 and the load drive circuit 37 for control. In addition, it is connected to the non-volatile memory 102 (storage means) via the I / O port 28 to send and receive signals.

The imbalance detecting means 100 is, for example,
A Hall sensor, a tacho generator, or the like may be used as long as the amount of eccentricity can be detected by the variation in the number of rotations of the motor 10 that drives the drum 3.
A current transformer or the like can be used as long as it can be detected by the amount of change in the current value of the motor 10 that is driving, but is not particularly limited in the present invention.

The display device drive circuit 35 includes the operation / display unit 1.
9 (FIG. 4) is a circuit for driving the display device 109 and includes a “detection switching” button 101. The buzzer drive circuit 36, when the key input by various buttons is completed,
It is a circuit for making the buzzer 110 (output means) ring in a manner corresponding to each at the end of operation and at the time of outputting an alarm to notify the user.

The load drive circuit 37 is connected to the drainage pump 11, the motor 10 and the water supply valve 18a, and drives each of them. The non-volatile memory 102 has a “detection switching” button 1
The control content switched and set by 01 (FIG. 4) is written from the microcomputer 22 and stored. The stored contents are retained even when the power is off, and when the microcomputer 22 issues a read request while the power is on, the stored contents are sent to the microcomputer 22.

The operation of the drum type washing machine having such a structure will be described below with reference to the flow charts shown in FIGS. In this washing machine, in the washing process, the item to be washed is stored in the drum 3, and the CPU 23
The water supply valve 18a is opened and tap water is poured into the water tank 2. At this time, as the tap water, the detergent filled in the detergent case 39 is poured into the water tank 2. When the water level in the water tank 2 detected by the water level sensor 12 reaches a predetermined water level, the CPU 23 causes the motor 1
0 starts rotating the drum 3 at a low speed.

In the drum 3, tap water permeates and is contained in the article to be washed while dissolving the detergent therein. The item to be washed is
Due to the centrifugal force due to the rotation of the drum 3 and the baffle 17,
After being lifted to near the top of the drum 3, it falls by its own weight (called tumbling). By repeating this tumbling, the article to be washed is hit and washed by the impact force when falling. Drain when tumbling is complete.

FIG. 6 is a flow chart showing the rinsing process of this drum type washing machine. In the rinsing step, after draining, the combination of the intermediate dehydration step and the rinsing step is performed multiple times. First, in the intermediate dehydration step, the CPU 23 clears the unbalance detection execution count, which is the number of times the imbalance in the drum 3 described below is detected (S1).
Next, the CPU 23 detects the eccentric weight with respect to the rotation axis of the drum 3 while rotating the drum 3 at a low speed to such an extent that the article to be washed sticks to the inner peripheral surface of the drum 3, and the detected eccentric weight exceeds a predetermined value. It is determined whether or not the unbalance in the drum 3 is detected (S2).

If the detected eccentric weight is smaller than the predetermined value and is not unbalanced (the imbalance is not excessive) (S3), the CPU 23 rotates the drum 3 at high speed (S3).
4) Perform intermediate dehydration until the dehydration time has elapsed (S5). In the intermediate dehydration, the centrifugal force generated by the high speed rotation of the drum 3 is used to press the article to be washed against the inner peripheral surface of the drum 3 to scatter the washing liquid contained in the article to be washed. At this time, the washing liquid is scattered from the small holes 4 of the drum 3, travels along the inner surface of the water tank 2, flows into the drainage duct 7, is filtered by the lint filter 13, and then is discharged from the outer box 1 by the drainage pump 11. Is discharged to.

When the dehydration time elapses, the CPU 23 (S
5) The trial rinsing step (S6) is executed. In the rinsing step (S6), rinsing is performed in order to perform the washing step described above for a predetermined time (a fraction of the washing step) without using a detergent. The CPU 23 then determines whether or not the trial rinsing step (S6) has already been performed a predetermined number of times (for example, 4 times) (L times) (S7), and if it has not been performed the predetermined number of times, returns to the intermediate dehydration step and unbalances. The detection execution count is cleared (S1). If the rinsing step (S6) has been performed a predetermined number of times (S7), the rinsing step is terminated and the next step (final dehydration step) is performed.

If the detected eccentric weight is larger than a predetermined value and is unbalanced (the imbalance is excessive) (S3), the CPU 23 stops the rotation of the drum 3 (S8), and executes the imbalance detection execution count. 1 is added to the count (S9). Next, the CPU 23 determines whether or not the added imbalance detection execution count (S9) is the predetermined detection count 4 (K) (S10). While rotating 3 at a low speed, the eccentric weight with respect to the rotation axis of the drum 3 is detected, it is determined whether the detected eccentric weight exceeds a predetermined value, and the imbalance in the drum 3 is detected (S2). By stopping the rotation of the drum 3 (S8), the object to be washed attached to the vicinity of the top of the drum 3 falls and the drum 3
There is a possibility that the distribution of the laundry in the inside will change and the eccentric weight will be reduced (operation for reducing the eccentric weight).

If the added imbalance detection execution count (S9) is the predetermined detection count of 4 (S10),
This means that even if the rotation of the drum 3 is stopped (S8), the imbalance in the drum 3 cannot be improved. If intermediate dehydration (S4, 5) is performed in this state, the equipment may be damaged. The CPU 23 determines that the added imbalance detection execution count (S9) is a predetermined detection count of 4 (S9).
10), the intermediate dehydration (S4, 5) is omitted, the skip flag is set (S11), and then the rinsing and rinsing step (S6).
To execute.

FIG. 7 is a flow chart showing the final dehydration step of this drum type washing machine. When the rinsing step is completed and the final dehydration step is performed, the CPU 23 first clears the imbalance detection execution count, which is the number of times the imbalance in the drum 3 is detected, as in the rinsing step (S15). The CPU 23 then determines that the item to be washed is the drum 3
While rotating the drum 3 at a low speed to such an extent that it sticks to the inner peripheral surface of the drum 3, the eccentric weight with respect to the rotation axis of the drum 3 is detected, and it is determined whether the detected eccentric weight exceeds a predetermined value. An imbalance is detected (S16). If the detected eccentric weight is smaller than the predetermined value and is not unbalanced (unbalance is not excessive) (S17), the drum 3 is rotated at high speed (S18), and the final dehydration is performed until the dehydration time elapses (S19). End the laundry operation.

In the final dehydration, the drum 3 is used as in the intermediate dehydration.
The washing liquid contained in the object to be washed is scattered by utilizing the centrifugal force generated by the high speed rotation. The washing liquid splashes from the small holes 4 of the drum 3, travels along the inner surface of the water tank 2, flows into the drainage duct 7, is filtered by the lint filter 13, and then the drainage pump 1
1 is discharged to the outside of the outer box 1.

If the detected eccentric weight is larger than a predetermined value and is unbalanced (the imbalance is excessive) (S17), the CPU 23 stops the rotation of the drum 3 (S20) and executes the imbalance detection execution count. 1 is added to the count (S21). Stop the rotation of the drum 3 (S
As a result, there is a possibility that the object to be washed attached to the vicinity of the top of the drum 3 will fall, the distribution of the object to be washed in the drum 3 will change, and the eccentric load will be reduced.

Next, the CPU 23 determines whether or not the skip flag is set (S22). If there is no skip flag, the added imbalance detection execution count (S21) is the predetermined detection count of 15 If the number of detections is not 15, the eccentric weight with respect to the rotation axis of the drum 3 is detected again while rotating the drum 3 at a low speed, and the detected eccentric weight exceeds the predetermined value. It is determined whether or not the unbalance in the drum 3 is detected (S16).

If the added imbalance detection execution count (S21) is the predetermined detection count of 15 (S23), the CPU 23 outputs an alarm from the operation / display unit 19 to notify the user of dehydration. Balance error processing is performed (S24). This means that even after repeating the rotation of the drum 3 (S20) and detecting the imbalance in the drum 3 (S16) 15 times, the imbalance in the drum 3 could not be improved. If the final dehydration (S18, 19) is performed in this state, the equipment may be damaged. Therefore, the final dehydration (S18, 19) may be performed in this state.
Notify the user because even after performing step 19), dehydration cannot be sufficiently achieved.

If the skip flag is present (S22), the CPU 23 determines whether or not the added imbalance detection execution count (S21) is the predetermined detection count 3 (S25). If not, again drum 3
While rotating at low speed, the eccentric weight with respect to the rotation axis of the drum 3 is detected, it is determined whether the detected eccentric weight exceeds a predetermined value, and the imbalance in the drum 3 is detected (S16).

If the added imbalance detection execution count (S21) is the predetermined detection count of 3 (S25), the CPU 23 outputs an alarm from the operation / display unit 19 to notify the user of dehydration. Balance error processing is performed (S24). This is because, in the rinsing step (FIG. 6), even if the rotation stop of the drum 3 and the unbalance detection are repeated, the unbalance cannot be improved.
In this final dehydration step, if the imbalance cannot be improved even if the rotation stop (S20) and the imbalance detection (S16) of the drum 3 are repeated three times, the subsequent stop (S20) and the imbalance detection ( This means that S16) is useless and it is better to inform the user as soon as possible to improve the imbalance.

Embodiment 2. FIG. 8: is a flowchart which shows the rinse process of Embodiment 2 of the drum type washing machine which concerns on this invention. The operation of the rinsing process of this drum type washing machine will be described below with reference to the flowchart of FIG. Since the configuration of this drum type washing machine is the same as the configuration of the drum type washing machine described in the first embodiment, description thereof will be omitted. This drum type washing machine
After draining, the combination of the intermediate dehydration step and the rinsing step is performed multiple times. First, in the intermediate dehydration step, the CPU 23 clears the unbalance detection execution count, which is the number of times the unbalance in the drum 3 is detected (S3).
0).

Next, the CPU 23 determines that the item to be washed is the drum 3
While rotating the drum 3 at a low speed to such an extent that it sticks to the inner peripheral surface of the drum 3, the eccentric weight with respect to the rotation axis of the drum 3 is detected, and it is determined whether the detected eccentric weight exceeds a predetermined value. An imbalance is detected (S31). CPU
23, if the detected eccentric weight is smaller than a predetermined value and is not unbalanced (unbalance is not excessive) (S
32), the drum 3 is rotated at high speed (S33), and intermediate dehydration is performed until the dehydration time has elapsed (S34).

When the dehydration time elapses, the CPU 23 (S
34), the rinsing step (S35) is executed. In the rinsing step (S35), rinsing is performed in order to perform the washing step for a predetermined time (a fraction of the washing step) without using a detergent.
Next, the CPU 23 determines whether or not the trial rinsing step (S35) has already been performed a predetermined number of times (for example, 4 times) (L times) (S36). The balance detection execution count is cleared (S30). If the rinsing step (S35) has been performed a predetermined number of times (S36), the rinsing step is terminated and the next step (final dehydration step) is performed.

If the detected eccentric weight is larger than a predetermined value and is unbalanced (unbalance is excessive) (S32), the CPU 23 stops the rotation of the drum 3 (S37), and executes the imbalance detection execution count. 1 is added to the count (S38). Next, the CPU 23 determines whether or not the added imbalance detection execution count (S38) is a predetermined detection count of 4 (K) (S39),
If the number of detections is not 4, the eccentric weight with respect to the rotation axis of the drum 3 is detected again while rotating the drum 3 at a low speed,
Determine whether the detected eccentric weight exceeds a predetermined value,
The imbalance in the drum 3 is detected (S31).

If the added imbalance detection execution count (S38) is the predetermined detection count of 4 (S3)
9) Even if the rotation of the drum 3 is stopped (S37), the imbalance in the drum 3 cannot be improved. If intermediate dehydration (S33, 34) is performed in this state, the equipment may be damaged. is there. If the added imbalance detection execution count (S38) is the predetermined detection count of 4 (S39), the CPU 23 determines whether or not the skip flag is set (S40), and if there is no skip flag. After setting the skip flag (S42), the intermediate dehydration (S33, 34) is omitted, and the rinsing step (S3) is performed.
Execute 5).

If the skip flag is set (S40), the CPU 23 outputs a warning from the operation / display unit 19 and performs dehydration imbalance error processing such as notifying the user (S41). Other operations are the same as the operations of the drum type washing machine described in the first embodiment, and thus the description thereof will be omitted. However, in the final dehydration step (Fig. 7),
Determination of whether or not the skip flag is set (S2
3), and determination of whether or not the imbalance detection execution count is the predetermined detection count 3 (S25) may be omitted.

Embodiment 3. FIG. 9: is a flowchart which shows the final dehydration process of Embodiment 3 of the drum type washing machine which concerns on this invention. The operation of the final dehydration process of this drum type washing machine will be described below with reference to the flowchart of FIG. Since the configuration of this drum type washing machine is similar to that of the drum type washing machine described in the first embodiment,
The description is omitted. When the CPU 23 completes the rinsing process similar to the rinsing process (FIG. 6) described in the first embodiment and shifts to the final dehydration process, first, like the rinsing process, the number of times imbalance in the drum 3 is detected. The unbalance detection execution count is cleared (S45).

Next, the CPU 23 sets a skip flag (S11 in FIG. 6) to be set when the imbalance detection execution count is the predetermined count 4, as in the rinsing step (FIG. 6) described in the first embodiment. If there is a skip flag, the predetermined value A of the eccentricity weight for detecting the imbalance in the drum 3 is determined as follows.
The eccentricity weight value B which is larger than the predetermined value A is changed and set (S5).
1). If there is no skip flag (S46), the predetermined value A of the eccentricity weight is not changed and set.

Next, the CPU 23 determines that the item to be washed is the drum 3
The eccentric weight with respect to the rotation axis of the drum 3 is detected while rotating the drum 3 at a low speed so that the eccentric weight detected exceeds the set eccentric weight value A or B at that time. It is determined whether or not the unbalance in the drum 3 is detected (S47). If the detected eccentricity weight is smaller than the set eccentricity weight value A or B at that time and is not unbalanced (unbalance is not excessive) (S48), the drum 3 is rotated at high speed (S4).
9) Until the dehydration time elapses (S50), final dehydration is performed and the washing operation is finished.

The CPU 23 detects that the detected eccentricity weight is larger than the set eccentricity weight value A or B at that time,
If it is unbalanced (the imbalance is excessive) (S48), the rotation of the drum 3 is stopped (S52),
Add 1 to the unbalance detection execution count (S
53). The CPU 23 then determines that the added imbalance detection execution count (S53) is the predetermined detection count of 15
(S54), and if the number of detections is not 15, the drum 3 is rotated again at low speed while the drum 3 is rotated again.
The eccentric weight with respect to the rotation axis of the drum 3 is detected, and it is determined whether the detected eccentric weight exceeds the set eccentric weight A or B at that time to detect the imbalance in the drum 3 (S47). ).

If the added imbalance detection execution count (S53) is the predetermined detection count of 15 (S54), the CPU 23 outputs an alarm from the operation / display unit 19 to notify the user of dehydration. Balance error processing is performed (S55). This is because if the skip flag is set in the rinsing process (S11 in FIG. 6), the final dehydration process relaxes the criterion for detecting the imbalance in the drum 3 and ends the final dehydration as soon as possible. That is. Other operations are the same as the operations of the drum type washing machine described in the first embodiment, and thus the description thereof will be omitted.

Fourth Embodiment FIG. 10: is a flowchart which shows the rinse process of Embodiment 4 of the drum type washing machine which concerns on this invention. The operation of the rinsing process of this drum type washing machine will be described below with reference to the flowchart of FIG. Since the configuration of this drum type washing machine is similar to that of the drum type washing machine described in the first embodiment,
The description is omitted. In the rinsing process, this drum type washing machine performs a combination of the intermediate dehydration process and the rinsing process a plurality of times after draining. First, in the intermediate dewatering process, the CPU 23 clears the unbalance detection execution count, which is the number of times imbalance is detected in the drum 3 described below (S60).

Next, as will be described later, the CPU 23 determines whether or not the skip flag (S72) to be set when the imbalance detection execution count is the predetermined count 4 (S61), If there is a skip flag, the predetermined value A of the eccentricity weight for detecting the imbalance in the drum 3 is changed and set to the eccentricity weight value B larger than the predetermined value A (S68). If there is no skip flag (S6
1) The predetermined value A of eccentricity weight is not changed and set.

Next, the CPU 23 determines that the item to be washed is the drum 3
The eccentric weight with respect to the rotation axis of the drum 3 is detected while rotating the drum 3 at a low speed so that the eccentric weight detected exceeds the set eccentric weight value A or B at that time. It is determined whether or not the unbalance in the drum 3 is detected (S62). If the detected eccentric weight is smaller than the set eccentric weight value A or B at that time and is not unbalanced (unbalance is not excessive) (S63), the CPU 23 rotates the drum 3 at high speed (S64). , Until the dehydration time elapses (S65),
Perform intermediate dehydration.

When the dehydration time elapses, the CPU 23 (S
65), the rinsing step (S66) is executed. In the rinsing step (S66), rinsing is performed to perform the washing step for a predetermined time (a fraction of the washing step) without using a detergent.
Next, the CPU 23 determines whether or not the trial rinsing step (S66) has already been performed a predetermined number of times (for example, 4 times) (L times) (S67). The balance detection execution count is cleared (S60). If the rinsing process (S66) has been performed a predetermined number of times (S67), the rinsing process is terminated and the process proceeds to the next process (final dehydration process). Since the final dehydration step is the same as the final dehydration step (FIG. 9) described in the third embodiment, description thereof will be omitted.

The CPU 23 detects that the detected eccentricity weight is larger than the set eccentricity weight value A or B at that time,
If it is unbalanced (unbalanced excessively) (S63), the rotation of the drum 3 is stopped (S69),
Add 1 to the unbalance detection execution count (S
70). Next, the CPU 23 determines that the added imbalance detection execution count (S70) is equal to the predetermined detection count of 4
It is determined whether or not (K times) (S71), and the number of detection times is 4
If not, again, while rotating the drum 3 at a low speed, the eccentric weight with respect to the rotation axis of the drum 3 is detected, and whether the detected eccentric weight exceeds the set eccentric weight A or B at that time. And the imbalance in the drum 3 is detected (S62).

If the added imbalance detection execution count (S70) is the predetermined detection count of 4 (S7)
1) After setting the skip flag (S72), the intermediate dehydration (S64, 65) is omitted, and the rinsing step (S6)
Perform 6). This means that if the skip flag is set in the rinsing process (S72), the criterion for unbalance detection in the drum 3 is relaxed in the subsequent rinsing process and the rinsing process is finished as soon as possible. That is. Other operations are the same as the operations of the drum type washing machine described in the first embodiment, and thus the description thereof will be omitted.

Embodiment 5. FIG. 11 is a flowchart showing the operation of the fifth embodiment of the drum type washing machine according to the present invention. The operation of this drum type washing machine is shown below in FIG.
This will be described with reference to the flowchart of FIG. Since the configuration of this drum type washing machine is the same as the configuration of the drum type washing machine described in the first embodiment, description thereof will be omitted. This drum type washing machine has a "power" button 103 (for example,
When the mechanical switch for turning on / off the primary power source is operated, the power source is turned on, and the CPU 23 (FIG. 5) resets the microcomputer 22 (FIG. 5) (S8).
After 0), initial setting is performed (S81). Next, the power supply frequency (50 Hz or 60 Hz) is determined, and the device is set so as to adapt to the determined frequency (S82).

The CPU 23 then proceeds to the non-volatile memory 10
The data of the control content accompanying the unbalance detection in the drum 3 is read from 2 (S83), and the operation acceptance sound of the "power" button 103 is sounded by the buzzer 110 (S8).
With 4), the read control contents are set and the display device 10
9 is displayed (S85). Next, the CPU 23 starts accepting button operation (input) (S86), and determines whether or not the button has been operated and the operation content has been changed (S8).
7), when it is determined that the operation content has not been changed,
It is determined whether or not the "detection switching" button 101 has been operated to switch the control associated with the imbalance detection in the drum 3 (S88).

When the CPU 23 determines that the driving content has been changed (S87), the CPU 23 displays the driving content.
After the setting is displayed on 9 and changed and set (S92), it is determined whether the control associated with the imbalance detection in the drum 3 has been switched (S88). When the CPU 23 determines that the control accompanying imbalance detection has not been switched (S
88), it is determined whether or not the "start" button 106 has been operated (S89). When the CPU 23 determines that the control associated with the imbalance detection has been switched (S8
7) After displaying the control content associated with the imbalance detection on the display device 109 and changing and setting it (S93), it is determined whether or not the "start" button 106 has been operated (S8).
9).

The control contents associated with the imbalance detection are such that, when the skip flag is set during the intermediate dehydration, the number of imbalance detections until the dehydration unbalance error process at the final dehydration is reduced (implementation). Example 1), when the skip flag is set during intermediate dehydration,
When the skip flag should be set,
Control for executing dehydration unbalance error processing (second embodiment), control for increasing a predetermined value of eccentricity weight for determining imbalance detection during final dehydration when a skip flag is set during intermediate dehydration. (Example 3), and when the skip flag is set during the intermediate dehydration,
During the subsequent intermediate dehydration, control for increasing the predetermined value of the eccentricity weight for determining the imbalance detection (Example 4) is included.

The CPU 23 uses the "start" button 106.
When it is determined that is not operated (S89), the process returns to the determination (S87) of whether or not the operation content is changed again. When the CPU 23 determines that the “start” button 106 has been operated (S89), the data of the control content associated with the imbalance detection in the drum 3 which is displayed and set on the display device 109 at that time is nonvolatile. Memory 1
02 (S90), and the washing operation is executed (S9).
1).

Even when the "detection switching" button 101 is operated while the washing operation is being executed (S91), the control associated with the imbalance detection in the drum 3 is switched (S8).
8) Then, the control content may be displayed on the display device 109 and changed and set (S93). At that time, the data of the changed control contents is written in the nonvolatile memory 102 (S
90), and waits for the operation of the "start" button 106 to continue the washing operation (S91).

Sixth Embodiment FIG. 12: is a flowchart which shows the final dehydration process of Embodiment 6 of the drum type washing machine which concerns on this invention. The operation of the final dehydration process of this drum type washing machine will be described below with reference to the flowchart of FIG. Since the configuration of this drum type washing machine is the same as the configuration of the drum type washing machine described in the first embodiment, description thereof will be omitted. When the CPU 23 completes the rinsing process similar to the rinsing process (FIG. 6) described in the first embodiment and moves to the final dehydration process, first, similarly to the rinsing process,
The unbalance detection execution count, which is the number of times imbalance in the drum 3 is detected, is cleared (S95).

Next, similarly to the rinsing step (FIG. 6) described in the first embodiment, the CPU 23 sets the skip flag (S11 in FIG. 6) to be set when the imbalance detection execution count is the predetermined count 4. If there is a skip flag, the drum 3 is rotated at a low speed so that the object to be washed sticks to the inner peripheral surface of the drum 3 (S97). Next, the CPU 23 shifts to high speed rotation of the drum 3 (S98), and the safety switch 107
(FIGS. 2 and 5) While determining whether or not the (amplitude determining means) operates (S99), until the dehydration time elapses (S10).
0) Perform final dehydration.

The CPU 23 rotates the drum 3 at a high speed (S98), the dehydration time elapses (S100), and if the safety switch 107 does not operate (S99), terminates the washing operation. If the safety switch 107 operates (S9
9), the rotation of the drum 3 is stopped (S108), and 1 is added to the unbalance detection execution count (S10).
9). Next, the CPU 23 determines that the added imbalance detection execution count (S109) is the predetermined detection count of 15
(S110), and if the number of detections is not 15, the drum 3 is rotated again at a high speed (S98).

The CPU 23 determines that the added imbalance detection execution count (S109) is equal to the predetermined detection count of 15
If so (S110), an alarm is output from the operation / display unit 19 to perform dehydration imbalance error processing such as notifying the user (S111). This is because if the skip flag is set in the rinsing step (S11 in FIG. 6),
In the final dehydration process, the safety switch 10 has a looser criterion for operating than the criterion for detecting unbalance.
It means that the final dehydration is executed until 7 operates, and the final dehydration is finished as soon as possible.

The CPU 23 uses the skip flag (S1 in FIG. 6).
If 1) is not set (S96), the eccentricity with respect to the rotating shaft of the drum 3 is detected while the drum 3 is rotated at a low speed so that the object to be washed sticks to the inner peripheral surface of the drum 3, and the detected eccentricity is detected. An imbalance in the drum 3 is detected by determining whether the weight exceeds a predetermined value (S10).
1). If the detected eccentricity weight is smaller than a predetermined value and is not unbalanced (unbalance is not excessive) (S1
02), the drum 3 is rotated at a high speed (S103), and the final dehydration is performed until the dehydration time elapses (S104), and the washing operation is ended.

If the detected eccentric weight is larger than the predetermined value and is unbalanced (unbalance is excessive) (S102), the CPU 23 stops the rotation of the drum 3 (S105) and executes the imbalance detection execution count. 1 is added to the count (S106). The CPU 23 then counts the number of executions of the added imbalance detection (S106).
, It is determined whether or not the predetermined number of detections is 15 (S10
7) If the number of detection times is not 15, the eccentric weight with respect to the rotation axis of the drum 3 is detected again while rotating the drum 3 at a low speed, and it is determined whether or not the detected eccentric weight exceeds a predetermined value. The imbalance within 3 is detected (S10
1).

The CPU 23 determines that the added imbalance detection execution count (S106) is equal to the predetermined detection count of 15
If so (S107), an alarm is output from the operation / display unit 19 to perform dehydration imbalance error processing such as notifying the user (S111). Since other operations are the same as the operations of the drum type washing machine described in the first embodiment,
The description is omitted.

[0094]

According to the drum type washing machine of the present invention,
It is possible to identify the laundry that is difficult to balance in the drum, and only in the case of the identified laundry, at the time of final dehydration,
It is possible to inform the user that it is necessary to correct the balance promptly, it is possible to shorten the washing operation time that is long due to the imbalance in the drum, and the frequency at which the user misunderstands that it is a malfunction. The number of calls to manufacturers is reduced.

Further, according to the drum type washing machine of the present invention, it is possible to discriminate the item to be washed whose balance in the drum is difficult to be adjusted.
The user can be informed that the balance needs to be corrected promptly, and the washing operation time, which is lengthened due to the imbalance in the drum, can be further shortened, and the user misunderstands that it is a malfunction. The frequency of calls is reduced, and the number of inquiries to manufacturers is reduced.

Further, according to the drum type washing machine of the present invention, the final dehydration can be carried out even in the case of the combination of the objects to be washed in which the balance in the drum is difficult to be adjusted, and the washing is performed without outputting the error notification. The operation can be ended.
In addition, the washing operation time, which is lengthened due to the imbalance in the drum, can be further shortened, and the user can
The frequency of misunderstanding that it is a malfunction decreases, and the number of phone calls to the manufacturer decreases.

Further, according to the drum type washing machine of the present invention, the number of times of imbalance detection during intermediate dehydration can be reduced even in the case of a combination of articles to be washed in which it is difficult to balance the drum. The washing operation time, which is long due to the internal imbalance, can be further shortened, and the frequency of the user's misunderstanding that it is a malfunction is reduced, and the number of inquiries to the manufacturer is reduced.

Further, according to the drum type washing machine of the present invention, the user can select the control associated with the detection of the imbalance in the drum, and further shorten the washing operation time lengthened due to the imbalance in the drum. In addition, the frequency with which the user mistakenly thinks that there is a failure is reduced, and the number of inquiries to the manufacturer is reduced.

Further, according to the drum type washing machine of the present invention, the user does not have to set the control associated with the detection of the imbalance in the drum every time washing is performed, and the operability is improved.

[Brief description of drawings]

FIG. 1 is a schematic partial cross-sectional view showing a configuration of an embodiment of a drum type washing machine according to the present invention.

FIG. 2 is an internal front view showing the configuration of the embodiment of the drum type washing machine according to the present invention.

FIG. 3 is a perspective view showing an appearance of an embodiment of a drum type washing machine according to the present invention.

FIG. 4 is an explanatory diagram for explaining an operation / display unit.

FIG. 5 is a block diagram showing a configuration of a control circuit of the embodiment of the drum type washing machine according to the present invention.

FIG. 6 is a flowchart showing a rinsing process of the drum type washing machine according to the present invention.

FIG. 7 is a flowchart showing a final dehydration process of the drum type washing machine according to the present invention.

FIG. 8 is a flowchart showing a rinsing process of the drum type washing machine according to the present invention.

FIG. 9 is a flowchart showing a final dehydration process of the drum type washing machine according to the present invention.

FIG. 10 is a flowchart showing a rinsing process of the drum type washing machine according to the present invention.

FIG. 11 is a flowchart showing an operation of the drum type washing machine according to the present invention.

FIG. 12 is a flowchart showing a final dehydration process of the drum type washing machine according to the present invention.

FIG. 13 is a flowchart showing a rinsing process of a conventional drum type washing machine.

FIG. 14 is a flowchart showing a final dehydration process of a conventional drum type washing machine.

[Explanation of symbols]

2 aquarium 3 drums 10 motors 10a rotating shaft 19 Operation / display 20 Control circuit 23 CPU 24 RAM 25 ROM 26 timer 33 Input key circuit 100 Unbalance detection means (determination means) 101 "Detection switching" button (selection setting means) 102 non-volatile memory (storage means) 103 "Power" button 105 Alarm lamp (output means) 107 Safety switch (amplitude determination means) 110 buzzer (output means)

Claims (7)

[Claims] 1. A drum that accommodates an article to be washed and rotates about a horizontal rotation shaft in a water tank, and whether or not an eccentric weight with respect to the rotation shaft exceeds a predetermined value when the drum rotates for dehydration When determining that the determination means exceeds a predetermined value during intermediate dehydration accompanying rinsing, after performing an operation for reducing the eccentric weight, the intermediate dehydration is performed again, and the determination means is provided. When it is determined that K has exceeded a predetermined value K times, after rinsing, intermediate dehydration is performed again, and when intermediate dehydration is performed L times, final dehydration is performed, and at the time of final dehydration, the determination means determines a predetermined value. When it is determined that the value exceeds the value, after the above operation, the final dehydration is performed again, and when the determination unit determines that the value exceeds the predetermined value M times, in the drum type washing machine that outputs an alarm, during the intermediate dehydration, One or more times, the judgment hand There is When determining K times that exceeds a predetermined value, the drum type washing machine, characterized in that it comprises the reduction means fewer the M times.
(K, L, M; any natural number) 2. A drum which accommodates an article to be washed and rotates around a horizontal rotation shaft in a water tank, and whether or not an eccentric weight with respect to the rotation shaft exceeds a predetermined value when the drum rotates for dehydration When determining that the determination means exceeds a predetermined value during intermediate dehydration accompanying rinsing, after performing an operation for reducing the eccentric weight, the intermediate dehydration is performed again, and the determination means is provided. When it is determined that K has exceeded a predetermined value K times, after rinsing, intermediate dehydration is performed again, and when intermediate dehydration is performed L times, final dehydration is performed, and at the time of final dehydration, the determination means determines a predetermined value. When it is determined that the value exceeds the value, after the above operation, the final dehydration is performed again, and when the determination unit determines that the value exceeds the predetermined value M times, in the drum type washing machine that outputs an alarm, during the intermediate dehydration, , The determination means determines a predetermined value When it is determined K times and was e, the determining means, again, when it is determined K times that exceeds a predetermined value, the drum type washing machine, characterized in that it comprises a means for outputting an alarm. 3. A drum which accommodates an article to be washed and rotates about a horizontal rotation shaft in a water tank, and whether or not an eccentric weight with respect to the rotation shaft exceeds a predetermined value when the drum rotates for dehydration. When determining that the determination means exceeds a predetermined value during intermediate dehydration accompanying rinsing, after performing an operation for reducing the eccentric weight, the intermediate dehydration is performed again, and the determination means is provided. When it is determined that K has exceeded a predetermined value K times, after rinsing, intermediate dehydration is performed again, and when intermediate dehydration is performed L times, final dehydration is performed, and at the time of final dehydration, the determination means determines a predetermined value. When it is determined that the value exceeds the value, after the above operation, the final dehydration is performed again, and when the determination unit determines that the value exceeds the predetermined value M times, in the drum type washing machine that outputs an alarm, during the intermediate dehydration, One or more times, the judgment hand There is When determining K times that exceeds a predetermined value, during the final dehydration, drum-type washing machine, characterized in that it comprises means to further increase the predetermined value. 4. A drum that accommodates an article to be washed and that rotates about a horizontal rotation shaft in a water tank, and whether or not an eccentric weight with respect to the rotation shaft exceeds a predetermined value when the drum is spin-dried. When determining that the determination means exceeds a predetermined value during intermediate dehydration accompanying rinsing, after performing an operation for reducing the eccentric weight, the intermediate dehydration is performed again, and the determination means is provided. When it is determined that K has exceeded a predetermined value K times, after rinsing, intermediate dehydration is performed again, and when intermediate dehydration is performed L times, final dehydration is performed, and at the time of final dehydration, the determination means determines a predetermined value. When it is determined that the value exceeds the value, after the above operation, the final dehydration is performed again, and when the determination unit determines that the value exceeds the predetermined value M times, in the drum type washing machine that outputs an alarm, during the intermediate dehydration, , The determination means determines a predetermined value When it is determined K times and was e, when the subsequent intermediate dehydration, drum-type washing machine, characterized in that it comprises means to further increase the predetermined value. 5. An output which outputs an alarm when the determination means determines K times that a predetermined value has been exceeded during intermediate dehydration, and when the determination means again determines that the predetermined value has been exceeded K times. Means, and one or more times during the intermediate dehydration, the first increasing means for increasing the predetermined value at the final dehydration when the determination means determines K times that the predetermined value is exceeded,
When the determination means determines K times that the predetermined value is exceeded during the intermediate dehydration, the second increasing means for increasing the predetermined value, the reducing means, the output means, and the first increase during the subsequent intermediate dehydration. The drum type washing machine according to claim 1, further comprising: a selection setting unit that selects one or a plurality of the means and the second increasing unit and sets the selected unit to operate. 6. The storage device further comprises storage means for storing the contents selected and set by the selection setting means regardless of whether the power supply is turned off. When the power supply is on, the contents stored in the storage means are stored in the storage means. The drum type washing machine according to claim 5, wherein the selection setting means is set. 7. A drum which accommodates an article to be washed and rotates around a horizontal rotation shaft in a water tank, and whether or not an eccentric weight with respect to the rotation shaft exceeds a predetermined value when the drum is spin-dried. When determining that the determination means exceeds a predetermined value during intermediate dehydration accompanying rinsing, after performing an operation for reducing the eccentric weight, the intermediate dehydration is performed again, and the determination means is provided. When it is determined that K has exceeded a predetermined value K times, after rinsing, intermediate dehydration is performed again, and when intermediate dehydration is performed L times, final dehydration is performed, and at the time of final dehydration, the determination means determines a predetermined value. When it is determined that the value exceeds the value, after the above operation, the final dehydration is performed again, and when the determination unit determines that the value exceeds the predetermined value M times, in the drum type washing machine that outputs an alarm, Whether the amplitude is larger than the specified amplitude And an amplitude determining means for determining, when the determining means determines K times that a predetermined value is exceeded during intermediate dehydration, means for inhibiting the operation of the determining means during final dehydration, and the amplitude during final dehydration. When the judging means judges that the amplitude is larger than the predetermined amplitude,
After the operation for reducing the amplitude, if the means for performing the final dehydration and the amplitude determining means are larger than a predetermined amplitude, M
A drum type washing machine comprising: a means for outputting an alarm when the number of times is determined.