JP2010063614A - Drum-type washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To cope with remarkable unbalance during a shower rinsing action appropriately. <P>SOLUTION: The drum-type washing machine can appropriately cope with the remarkable unbalance during the shower rinsing action by supplying water into a drum by a water shower supply device (S10) while rotating the drum at a marginal or lower speed at which laundry adheres to the inside periphery of the drum in a rinsing process to rinse the laundry (S9), then carrying out the shower rinsing action to rotate the drum at a high speed (S13), sensing the unbalance of the drum by an unbalance sensing means (S11) at the stage of water supply into the drum while rotating the drum performing the shower rinsing action at a lower speed, and carrying out an unbalance correction action to correct the unbalance (S15) when it is decided that the unbalance of a prescribed or greater magnitude has occurred from the result of the sensing. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a drum-type washing machine that performs shower rinsing.

Conventionally, in a drum-type washing machine, a water tub is provided inside an outer box, and a drum is provided inside the water tub, and this drum is rotated by a drum driving device such as a motor. Yes.
In the rinsing process of rinsing the laundry, the amount of water that sufficiently immerses the laundry in the drum from the inside of the aquarium (equivalent to the washing process) is generally supplied by a normal water supply device such as a water supply valve connected to the water supply. After that, the drum is rotated at a speed (tumbling) at which the laundry is lifted and then dropped (tumbling), and a rinsing (rinsing operation) is executed.
However, this cannot efficiently wash the laundry.

  On the other hand, in addition to the water tank, drum, drum driving device, and normal water supply device, the drum has a shower water supply device for supplying water in a shower-like manner, and the limit of the laundry sticking to the inner peripheral surface of the drum While rotating at the above-mentioned low speed, water is supplied into the drum by the shower water supply device, and then a rinse (shower rinsing operation) is executed to rotate the drum at high speed.

  In such a case, water is applied to the laundry by supplying water into the drum by the shower water supply device, and the water is soaked into the laundry by centrifugal force due to the low-speed rotation of the drum, and the soaked water At the same time, the detergent is squeezed out of the laundry by the centrifugal force generated by the high-speed rotation of the drum, and the laundry can be efficiently rinsed.

  However, in the case of such a thing, when water soaks into the laundry, an increase in the weight of the laundry may cause an unbalance in the drum that continues to rotate. In particular, the imbalance is greatly generated on the inner peripheral surface of the drum to which the laundry is stuck, where a cloth-like laundry having good water absorption and a large increase in weight due to water absorption, such as fleece, is stuck. When such a large imbalance occurs, a large vibration is caused from the drum to the water tank that supports the drum, and further, the result is that the water tank collides with the outer box or the outer box vibrates greatly. It was brought.

In addition, there is an idea that performs a shower rinsing operation and includes a vibration sensor that detects vibration of the drum (see, for example, Patent Document 1).
JP 2008-54941 A

  The above-described shower rinsing operation, which includes a vibration sensor that detects drum vibration, increased the rotation of the drum during the dehydration process before the shower rinsing operation, not during the shower rinsing operation. Sometimes, if a large vibration is detected by the vibration sensor, the rotation speed of the drum is restored, so that even if the vibration of the drum is large, the drum rinses from the dehydration process without stopping the drum rotation. It is not only capable of shifting to operation, but cannot cope with the occurrence of a large imbalance during the shower rinsing operation.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a drum type washing machine that can appropriately cope with the occurrence of a large imbalance during a shower rinsing operation.

  In order to achieve the above object, in the drum type washing machine of the present invention, an outer box, a water tank disposed in the outer box, a drum disposed in the water tank, and the drum are provided. Rinsing the laundry, comprising a drum driving device to be rotated, a shower water supply device for supplying water in the form of a shower inside the drum, and an unbalance detecting means for detecting an imbalance when the drum rotates. In the process, a shower rinsing operation is performed in which the drum is rotated by the shower water supply device while rotating the drum at a speed lower than the limit at which the laundry is stuck to the inner peripheral surface, and then the drum is rotated at a high speed. In the stage of performing the shower rinsing operation and supplying water into the drum while rotating the drum at a low speed, the detection result by the unbalance detection means The unbalance of the drum is determined, and when it is determined that an unbalance greater than a predetermined value has occurred, an unbalance correction operation for correcting the unbalance is executed (invention of claim 1). ).

  According to the above means, during the shower rinsing operation, at the stage of supplying water into the drum while rotating the drum at a low speed, the unbalance detection of the drum is performed by the unbalance detection means. When it is determined that a balance has occurred, an unbalance correction operation for correcting the unbalance can be performed to appropriately cope with the occurrence of a large unbalance during the shower rinsing operation.

Hereinafter, a first embodiment (first embodiment) of the present invention will be described with reference to FIGS.
First, FIG. 4 and FIG. 5 show the entire structure of the drum type washing machine, and the outer box 1 is an outer shell. In detail, the outer box 1 is composed of a base 1a and a box main body 1b attached and bonded to the base 1a. At the center of the front part (left side in FIG. 5) of the box main body 1b, The laundry doorway 2 is formed, and a door 3 for opening and closing the doorway 2 is provided. An operation panel 4 is provided at the upper part of the front surface of the box body 1b, and a control device 5 is provided on the back side (inside the outer box 1).

A water tank 6 is disposed inside the outer box 1. This water tank 6 has a horizontal cylindrical shape whose axial direction is front and rear (left and right in FIG. 5), and is elastically supported by a pair of left and right suspensions 7 (only one is shown) in an upwardly inclined manner.
A motor 8 is attached to the back of the water tank 6. In this case, the motor 8 is composed of, for example, a direct current brushless motor, and is an outer rotor type. The rotating shaft 8c is attached to the back portion of the water tank 6 and the center portion of the rotor 8b is attached to the rotating shaft 8c. The water tank 6 is inserted through a plurality of bearings 10 installed in the water tank 6.

  A drum 11 is disposed inside the water tank 6. This drum 11 also has a horizontal cylindrical shape whose front and rear are axial directions, and is attached to the front end portion of the rotating shaft 8c of the motor 8 at the center of the rear portion so that the drum 11 is inclined upward and coaxial with the water tank 6. I support it. As a result, the drum 11 is directly rotated by the motor 8. Therefore, the motor 8 functions as a drum driving device that rotates the drum 11.

  A large number of small holes 12 (only a part of which is shown in FIG. 5) are formed in the peripheral side portion (body portion) of the drum 11 and a plurality of baffles 13 for picking up laundry are provided (one). Only shown). The drum 11 and the water tank 6 both have openings 14 and 15 on the front surface, and a liquid-sealed rotary balancer 16 is provided inside the periphery of the opening 14 of the drum 11, for example. The laundry entrance / exit 2 is connected to the opening 15 of the water tub 6 via an annular bellows 17. As a result, the laundry doorway 2 is connected to the inside of the drum 11 through the bellows 17, the opening 15 of the water tub 6, and the opening 14 of the drum 11.

  A drain outlet 18 is formed at the lowest part in the bottom of the water tank 6, in this case, the last part, and the base end of the in-machine drain hose 19 is connected to the drain outlet 18, and the distal end of the in-machine drain hose 19 is connected. Is connected to the in-machine drain hose connection port 21 of the filter case 20 disposed in the front portion of the base 1a of the outer box 1.

The filter case 20 has the above-mentioned in-machine drain hose connection port 21 at the upper part, and a cap 22 is attached to the front end portion, and a lint filter (not shown) integrated with the cap 22 is accommodated inside. Yes. A small door 23 is provided at the front lower part of the outer box 1 with respect to the cap 22, and the small door 23 is opened so that the cap 22 can be removed from the filter case 20 so that the lint filter can be taken in and out.
A drain valve 24 is connected to the lower side of the rear side of the filter case 20, and a drain pipe 25 is connected to the outlet of the drain valve 24. The distal end of the drainage pipe 25 faces the outside of the machine from the base 1a of the outer box 1 and is connected to an outside drainage hose (not shown).

  On the other hand, a circulation pump 26 is provided at the rear end of the filter case 20. This circulation pump 26 sucks the water in the water tank 6 through the filter case 20, the in-machine drain hose 19, and the drain port 18, and has a discharge port 27 on the peripheral side (upper part in the figure). The base end of the water supply hose 28 is connected to the discharge port 27. The water supply hose 28 has an intermediate portion piped upward from the circumferential side of the bellows 17, and a tip portion is connected to a fountain nozzle 29 provided at an upper portion of the bellows 17 so as to face the inside of the drum 11. Not.

  As a result, the circulation pump 26 sucks the water in the water tank 6 from the drain port 18 through the in-machine drain hose 19-filter case 20 (lint filter) -circulation pump 26 as shown by an arrow in FIG. Thus, the water is supplied through the water supply hose 28 and supplied from the fountain nozzle 29 to the inside of the drum 11 in the form of a shower.

  An air trap 31 is connected to the upper portion of the front portion of the filter case 20, and an air tube 33 is provided between the air trap 31 and a water level sensor 32 disposed at the uppermost portion in the outer box 1. Connected. Accordingly, the water level sensor 32 detects the water level in the water tank 6 via the in-machine drain hose 19, the filter case 20, the air trap 31, and the air tube 33, and functions as a water level detecting means. It has become.

In addition, a water supply valve 34 and a water supply case 35 are disposed at the top of the outer box 1. Of these, the water supply valve 34 is connected to an external water supply hose (not shown) connected to a water tap (not shown) at the inlet, and the outlet is connected to the water supply case via the connection pipe 36. 35 is connected. The water supply case 35 has a detergent storage part (also not shown) inside, and the inside communicates with the water tank 6 via the in-machine water supply hose 37 from above. Accordingly, the water supply valve 34 communicates with the water tank 6 through the water supply case 35, and the water supply valve 34 and the water supply case 35 constitute a normal water supply device 38 for supplying water into the water tank 6.
And the vibration sensor 39,40 which is a vibration detection means is provided in the front part of the uppermost part of the water tank 6, and a rear part.

  FIG. 6 is a block diagram showing an electrical configuration centering on the control device 5. The control device 5 is composed of, for example, a microcomputer and functions as a control means for controlling the overall operation of the drum type washing and drying machine. Various operation signals are input to the control device 5 from an operation input unit 41 including various operation switches of the operation panel 4.

  In addition, the control device 5 is provided with a water level detection signal from the water level sensor 32 and vibration detection signals from the vibration sensors 39 and 40, respectively, and further detecting the rotation of the motor 8. The rotation detection signal from the rotation sensor 42, the current detection signal from the current sensor 43 provided so as to detect the current flowing through the motor 8, and the temperature detection signal from the temperature sensor 44 for detecting the temperature (particularly the temperature) are input. It has come to be. The control device 5 performs an operation of dividing the number of rotations of the motor 8 and hence the number of rotations of the drum 11 by the detection time based on the rotation detection signal from the rotation sensor 42, thereby rotating the drum 11. It also functions as a rotational speed detecting means for detecting the speed.

  And the control apparatus 5 gives a drive control signal to the drive circuit 45 which drives the said water supply valve 34, the motor 8, the circulation pump 26, and the drain valve 24 based on those inputs and the control program memorize | stored beforehand. It is like that.

Next, the operation of the above configuration will be described.
FIG. 1 shows the operation control contents of the control device 5 only up to the rinsing process, which is based on the user's operation on the operation panel 4, and when the user performs an operation to start driving, the control device 5 starts (starts) driving, and first detects the amount of laundry (step S1). The detection of the amount of laundry is performed by rotating the drum 11 to a predetermined rotational speed, and the time required for the rotation, and then stopping the driving of the drum 11 by the motor 8 to rotate the drum 11 by inertia, thereby rotating the drum 11. The amount of laundry is detected by the rotational load of the motor 8 from the time required for the speed to drop to a predetermined rotational speed. Accordingly, at this time, the rotation sensor 42 and the control device 5 function as laundry amount detection means.

  Thereafter, from the detection result of the amount of laundry, determination of the amount of laundry and determination of the water level in the washing process and the rinsing process are performed (step S2), and then tap water up to the water level determined for the washing process is determined. Is supplied (step S3). The tap water is supplied by a normal water supply device 38. At this time, the detergent stored in the detergent storage part of the water supply case 35 is added together with the water supply.

Next, a washing process is executed (step S4). This washing process is performed by reversing the drum 11 in the normal direction, whereby the laundry previously stored in the drum 11 is lifted and then dropped (tumbling) to be washed.
Thereafter, drainage is performed (step S5). This drainage is performed by opening the drainage valve 24 so that the water in the aquarium 6 (in the drum 11) is drained from the drainage port 18 of the aquarium 6 to the in-machine drainage hose 19-filter case 20 (lint filter) -drainage valve 24-drainage. Pipe 25-performed with the content discharged through the machine drain hose.

And after that, a dehydration process is performed (step S6). In this dehydration process, the laundry in the drum 11 is centrifugally dehydrated by rotating the drum 11 at a high speed of, for example, 1300 [rpm] while keeping the drain valve 24 open.
Thereafter, as shown in FIG. 2, the rotation of the drum 11 is stopped (step S7).

  Then, a rinsing process is performed. In this rinsing process, a shower rinsing operation is performed. After step S7, tap water is supplied up to the water level determined for the rinsing process (shower rinsing operation) (step S8). The tap water is supplied in the same manner as in step S3. At this time, there is no detergent in the detergent storage part of the water supply case 35, and therefore only tap water is supplied into the water tank 6. Further, the water level at this time is H as indicated by a two-dot chain line in FIG. 5, which is lower than the water tank 6, and from the water level in the washing step (the water level that sufficiently immerses the laundry stored in the drum 11). Pretty low.

  Thereafter, the drum 11 is rotated at a low speed (for example, 90 [rpm]) exceeding the limit at which the laundry sticks to the inner peripheral surface (step S9), and at the same time, the circulation pump 26 is operated and the drum by the shower water supply device 30 is used. 11 is supplied with water (step S10). Thereby, water is poured on the laundry stuck to the inner peripheral surface of the drum 11 with shower water supply, and the water is soaked into the laundry by centrifugal force due to the low-speed rotation of the drum 11.

  During the shower rinsing operation, the imbalance is detected and determined for the weight distribution of the laundry stuck to the inner peripheral surface of the drum 11 (step S11). In this case, the imbalance is detected by looking at the current detection signal from the current sensor 43 that detects the current flowing through the motor 8 that has rotated the drum 11. Specifically, the unbalance is detected by the current sensor 43. Among them, the q-axis current is calculated by the control device 5. Therefore, at this time, the current sensor 43 and the control device 5 function as unbalance detection means.

  Here, generally, with respect to the magnetic flux generated by the S and N poles of the motor 8 that rotates the drum 11, the parallel direction (rotational direction) is referred to as d-axis current, and the perpendicular direction is referred to as q-axis current. Of these, the q-axis current affects the rotational torque of the motor 8, and therefore, when the rotational imbalance is large, the rotational torque increases to increase the q-axis current. This is used to determine imbalance. When using data as a judgment value, it is necessary to replace the current value with a voltage value, so the value converted to the voltage value is used as the sensor value. To do.

  FIG. 3A shows a state of rotation of the drum 11 during the shower rinsing operation, and FIG. 3B shows a change in sensor value for unbalance detection. The sensor value for unbalance detection is a predetermined value. If the threshold value is not exceeded, it is determined in step S11 that the imbalance is not greater than a predetermined value (NO). Then, the shower water supply is continued until the end of the set time (for example, 3 [minutes]) from the start (step S9) (step S12), and then the shower water supply is stopped and the drain valve 24 is turned on. The drum 11 is opened and the rotation of the drum 11 is increased (step S13). As a result, the detergent and the water soaked in the laundry are squeezed out of the laundry by the centrifugal force generated by the high-speed rotation of the drum 11.

On the other hand, if the sensor value for unbalance detection exceeds a predetermined threshold value, it is determined in step S11 that the unbalance is greater than a predetermined value (YES). Then, the low-speed rotation of the drum 11 and the shower water supply are continued until the end of the set time (for example, 3 [minutes]) from the start (step S9), thereby ending the shower rinsing operation. (Step S14), and thereafter, an unbalance correction operation for correcting the unbalance is executed (step S15). This unbalance correction operation is, for example, a content in which the drum 11 is forwardly reversed at a low speed of, for example, 50 [rpm], which is less than the limit on which the laundry is stuck to the inner peripheral surface, or the rotation speed of the drum 11 is also set to, for example, 50 [rpm]. (FIG. 2 shows the former of them), and the laundry falls from the inner peripheral surface of the drum 11 to correct the imbalance.
Thereafter, the drum 11 is rotated again at a low speed (for example, 90 [rpm]) that is higher than the limit at which the laundry sticks to the inner peripheral surface (step S16), and then the process returns to step S11.

  As described above, in the present configuration, in the rinsing process of rinsing the laundry, the drum 11 is rotated at a low speed that is higher than the limit at which the laundry is stuck to the inner peripheral surface thereof, and is moved into the drum 11 by the shower water supply device 30. In the stage of performing the shower rinsing operation for rotating the drum 11 at a high speed and then supplying water to the inside of the drum 11 while rotating the drum 11 at a low speed during the shower rinsing operation, The detection means detects the unbalance of the drum, and when it is determined from the detection result that an unbalance greater than a predetermined value has occurred, an unbalance correction operation for correcting the unbalance is executed. Since the balance is corrected, it is possible to appropriately cope with the occurrence of a large unbalance during the shower rinsing operation. Collision aquarium into the outer box, the occurrence of large vibration of the outer box can be reliably prevented.

  7 to 15 show second to seventh examples (second to seventh embodiments) of the present invention, and the same parts as those of the first example are the same as those of the first example. A description will be omitted with reference numerals, and only different parts will be described.

[Second Embodiment]
In the second embodiment shown in FIGS. 7 and 8, when it is determined in step S11 during the shower rinsing operation that an unbalance greater than a predetermined value has occurred, the rotation of the drum 11 and the shower water supply are stopped. The shower rinsing operation is interrupted (step S101), and the unbalance correction operation is executed (step S15).

  By doing so, when it is determined that an unbalance greater than a predetermined amount has occurred during the shower rinsing operation, the shower rinsing operation, in particular, the rotation of the drum 11 is not continued. Generation of large vibrations of the outer box can be prevented more quickly.

[Third embodiment]
In the third embodiment shown in FIG. 9, the washing value detected by the laundry amount detection means (the rotation sensor 42 and the control device 5) is determined as the determination value (threshold value) for determining that the unbalance is larger than a predetermined value in step S <b> 11. Different depending on the quantity and temperature detected by the temperature sensor. Specifically, in using the value obtained by converting the q-axis current of the current detected by the current sensor 43 into a voltage value as the sensor value as described above, the determination value is set as the detected amount of laundry is smaller. The determination value is increased as the detected temperature is lower (set at 8 [A] = 1.25 [V]).

  Regarding the unbalance when the drum 11 rotates, according to the experiment of the present inventors, even with the same unbalance, the vibration of the water tub 6 increases as the amount of laundry decreases, and the vibration of the water tub 6 increases as the amount of laundry increases. Has been found to be smaller. That is, when the amount of laundry is small, the vibration is larger than when it is large.

On the other hand, the load applied to the motor 8 that rotates the drum 11 increases as the amount of laundry decreases, and decreases as the amount of laundry increases. Therefore, the sensor value increases as the amount of laundry decreases.
Similarly, according to the experiment by the present inventor, it has been found that even with the same unbalance, the sensor value tends to increase as the temperature decreases and decrease as the temperature increases.
Based on the above relationship, the sensor value is measured for each amount of laundry and for each temperature, and the determination value is set for each amount of laundry and for each temperature.

  By doing in this way, the optimal imbalance determination according to the actual amount of laundry and actual temperature can be performed, and the collision of the water tank with the outer box and the occurrence of large vibration of the outer box can be more reliably prevented. .

[Fourth embodiment]
In the fourth embodiment shown in FIGS. 10 and 11, as in the second embodiment, when it is determined in step S11 during the shower rinsing operation that an unbalance larger than a predetermined value has occurred, the rotation of the drum 11 and the shower are performed. By stopping the water supply, the shower rinsing operation is interrupted (step 101), and the unbalance correction operation is executed (step S15). Thereafter, the drum 11 is again over the limit where the laundry is stuck to the inner peripheral surface. When rotating at a low speed (for example, 90 [rpm]) (step S16), the shower water supply into the drum 11 is restarted (step S201), that is, the shower rinsing operation is restarted.

  Then, after that, it is determined whether or not the set time (3 [minutes]) of shower water supply has expired (step S202), and if it is determined that it has not expired (NO), the process returns to step S11. However, if it is determined that it has expired (YES), the shower water supply is stopped, the drain valve 24 is opened (step S203), and the rotation of the drum 11 is increased (step S204).

  That is, in this case, during the shower rinsing operation, when it is determined that an unbalance greater than a predetermined value has occurred, the shower rinsing operation is interrupted, and when the unbalance correction operation is executed, the remaining suspended The shower rinsing operation is executed, whereby the shower rinsing operation can be executed without shortage, and the rinsing performance can be ensured.

[Fifth embodiment]
In the fifth embodiment shown in FIGS. 12 and 13, as in the second embodiment, when it is determined in step S <b> 11 during the shower rinsing operation that an unbalance larger than a predetermined value has occurred, By stopping the rotation and the shower water supply, the shower rinsing operation is interrupted (step 101), and then the shower water supply is continued (step S301) and the unbalance correction operation is executed (step S15).
Further, after that, the process proceeds from step S16 to steps S202 to S204.

  That is, in this case, when it is determined that an unbalance larger than a predetermined value has occurred during the shower rinsing operation, the shower rinsing operation is interrupted and the unbalance correcting operation is executed. Also, the water supply to the inside of the drum 11 by the shower water supply device 30 is continued in the remaining shower rinsing operation.

  As a result, the shower rinsing operation can be prevented from being insufficient due to the interruption of the shower rinsing operation, and the shower water supply can be continued without interruption before the shower rinsing operation is interrupted. The durability of the apparatus 30 (particularly, in the case of the present embodiment, the circulation pump 26) can be ensured, and the control program can be simplified.

[Sixth embodiment]
In the sixth embodiment shown in FIG. 14, the water supply to the inside of the drum 11 by the shower water supply device 30 in the remaining shower rinsing operation interrupted during the unbalance correction operation of the fifth embodiment is performed. When continuing, water is supplied for a longer period of time ("water supply addition" time) than the remaining shower rinsing operation.

  When the water supply to the inside of the drum 11 by the shower water supply device 30 described above is continued, the unbalance correction operation is being executed, and the rotational speed of the drum 11 is set on the inner peripheral surface of the drum 11 to the laundry. Is lower than the limit of sticking (for example, the above-mentioned 50 [rpm]), and since the laundry has fallen from the inner peripheral surface of the drum 11, water is not sufficiently applied to the laundry, resulting in unevenness. Cheap. In contrast, in the sixth embodiment, by supplying water longer than the amount of the rest of the shower rinsing operation, more water can be supplied to the laundry, and sufficient water can be supplied evenly. Thereby, the rinsing performance can be ensured.

[Seventh embodiment]
In the seventh embodiment shown in FIG. 15, in the dehydration process before the rinsing process, the drum 11 is rotated at a high speed of 1300 [rpm], for example, and the rotation of the drum 11 is braked (brake) and stopped. Therefore, the rotational speed of the drum 11 is lowered to such an extent that the laundry stuck to the inner peripheral surface of the drum 11 does not fall, and in this state, the shower rinsing operation is started.

  When the drum 11 is rotated at a high speed of, for example, 1300 [rpm] in the dehydration process before the rinsing process, when the rotation of the drum 11 is braked and stopped once, the inner peripheral surface of the drum 11 at that time When the laundry stuck to the floor falls and the rotational speed of the drum 11 is increased by the subsequent shower rinsing operation, unbalance is likely to occur. On the other hand, in the seventh embodiment, the rotation speed of the drum 11 is reduced to such an extent that the laundry stuck to the inner peripheral surface of the drum 11 does not fall without temporarily stopping the rotation of the drum 11. Since the transition to the shower rinsing operation is performed, unbalance is unlikely to occur and the shower rinsing operation can be executed smoothly.

  In each of the above embodiments, the shower water supply device 30 is configured by the in-machine drain hose 19, the filter case 20, the circulation pump 26, the water supply hose 28, and the fountain nozzle 29. However, the present invention is not limited to this, and the water supply valve 34 You may make it comprise by making it branch and connecting to the fountain nozzle 29. FIG.

Further, the unbalance when the drum 11 rotates may be detected by at least one of the vibration sensors 39 and 40, that is, the unbalance detection means is constituted by at least one of the vibration sensors 39 and 40. May be.
In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and can be implemented with appropriate modifications within a range not departing from the gist.

The flowchart which shows 1st Example of this invention. Time chart The state of rotation of the drum during the shower rinsing operation is shown in (a), and the change in the sensor value for unbalance detection is shown in (b). Broken perspective view of the entire drum type washing machine Longitudinal side view of the entire drum type washing machine Electrical configuration block diagram FIG. 1 equivalent view showing a second embodiment of the present invention. 2 equivalent diagram The figure which shows 3rd Example of this invention by the relationship between the amount of laundry and temperature, and an imbalance determination value. FIG. 1 equivalent view showing a fourth embodiment of the present invention. 2 equivalent diagram FIG. 1 equivalent view showing a fifth embodiment of the present invention. 2 equivalent diagram FIG. 2 equivalent diagram showing a sixth embodiment of the present invention. FIG. 2 equivalent view showing a seventh embodiment of the present invention

Explanation of symbols

  In the drawings, 1 is an outer box, 5 is a control device (unbalance detection means), 6 is a water tank, 8 is a motor (drum driving device), 11 is a drum, 30 is a shower water supply device, and 39 and 40 are vibration sensors (unloading). Reference numeral 43 denotes a balance detection means, and 43 denotes a current sensor (unbalance detection means).

Claims (6)

An outer box,
A water tank disposed inside the outer box;
A drum disposed inside the aquarium;
A drum driving device for rotating the drum;
A shower water supply device for supplying water in the form of a shower inside the drum;
Comprising unbalance detection means for detecting unbalance when the drum rotates,
In the rinsing process of rinsing the laundry, water is supplied into the drum by the shower water supply device while rotating the drum at a speed lower than the limit at which the laundry sticks to the inner peripheral surface, and then the drum is Execute the shower rinsing operation to rotate at high speed,
During the shower rinsing operation, at the stage of supplying water into the drum while rotating the drum at a low speed, the unbalance determination of the drum is performed based on the detection result by the unbalance detection means, and an unbalance larger than a predetermined value is generated. A drum-type washing machine characterized in that when it is determined that an unbalance has been determined, an unbalance correction operation for correcting the unbalance is executed.   During the shower rinsing operation, when it is determined that an unbalance greater than a predetermined level has occurred in the stage of supplying water to the drum while rotating the drum at a low speed, the shower rinsing operation is interrupted and an unbalance correction operation is performed. 2. The drum type washing machine according to claim 1, wherein:   During the shower rinsing operation, at the stage of supplying water to the drum while rotating the drum at a low speed, the shower rinsing operation is interrupted when it is determined that a larger imbalance than the predetermined level has occurred. 3. The drum type washing machine according to claim 2, wherein when the operation is executed, the suspended shower rinsing operation is executed thereafter.   During the shower rinsing operation, at the stage of supplying water to the drum while rotating the drum at a low speed, the shower rinsing operation is interrupted when it is determined that a larger imbalance than the predetermined level has occurred. 3. The water supply to the inside of the drum by the shower water supply device of the remaining shower rinsing operation that has been interrupted is continued during the unbalance correction operation when the operation is executed. Drum-type washing machine.   During the unbalance correction operation, when continuing to supply water into the drum by the shower water supply device among the remaining shower rinsing operations that were interrupted, it was confirmed that water was supplied longer than the remaining shower rinsing operations that were interrupted. The drum type washing machine according to claim 4,   The rinsing process proceeds through a dehydration process after the washing process. From the dehydration process, the rotation speed of the drum is adjusted so that the laundry stuck to the inner peripheral surface of the drum does not fall from the state where the drum is rotated. 2. The drum type washing machine according to claim 1, wherein the drum type washing machine is moved down to a shower rinsing operation.

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