TWI805809B - front load washing machine - Google Patents

Abstract

The drum-type washing machine in this disclosure includes: a casing, an outer tank, an inner tank, a motor, a vibration detection unit, and a control unit. During the dehydration operation, the control unit is configured to determine the position of the eccentric load of the inner tank by comparing the operation information of the outer tank as follows, and control the motor according to the determined position of the eccentric load of the inner tank. The movement information of the groove is: when the movement information of the outer groove along one of the first axis and the second axis becomes a maximum value, the movement information of the outer groove along the other axis different from one of the axes, and the When the motion information of the outer groove along one of the axes becomes a minimum value, the motion information of the outer groove along the other axis.

Description

front load washing machine

field of invention The present disclosure relates to a drum type washing machine which detects the unbalanced state of the clothes in the rotating drum.

Background of the invention In the past, among drum-type washing machines, there is known a drum-type washing machine that detects whether the clothes in the rotating drum disposed inside the water tank are unevenly distributed in front of or behind the rotating drum.

When there is an unbalanced load in front of the rotating drum, there are problems as follows.

The first problem is that the possibility of abnormal vibration of the washing machine body is high due to the vibration of the front part of the water tank. Between the inlet of the main body of the washing machine and the opening of the water tank, a sealing member and the like for suppressing leakage of washing water are provided. Therefore, the vibration of the front part of the water tank is easily transmitted to the main body of the washing machine.

The second problem is that the off-center load in the front places a large load on the shaft. The shaft is connected to the rear of the rotating drum. Therefore, when there is an off-center load behind the rotating drum, no significant load is applied to the shaft. On the other hand, when there is an unbalanced load in front of the rotating drum, since the distance from the shaft to the front of the rotating drum is long, a large load is applied to the shaft. Thereby, there is a possibility of shaft damage.

Japanese Patent Application Laid-Open No. 2010-136903 discloses a drum type washing machine in which the position of the unbalanced load is estimated from the correlation between the vibration at the front of the sink and the experimental results to determine the unbalanced state of the clothes.

The washing machine in Japanese Patent Application Laid-Open No. 2010-136903 is equipped with: a water tank supported inside the washing shell; a rotating drum freely rotatably installed inside the water tank; And detect vibration components in three-dimensional directions. During the dehydration operation of the washing machine, the vibration components in two directions detected at the front of the water tank and the correlation relationship between the vibration components at the rear of the water tank and the vibration components at the front of the water tank obtained through experiments are used to determine the direction of the water outlet tank. Offset load position.

Summary of the invention However, in the conventional configuration, since the position of the off-load is estimated based on the correlation obtained through experiments, the accuracy of specifying the position of the off-load is low. Therefore, there is a possibility that the unbalanced state exists in the front or the rear and is misjudged.

The present disclosure provides a drum type washing machine which can detect the vibration of the water tank, and determine whether the partial load caused by the laundry in the rotating drum is at the front or the rear according to the detected value.

The drum-type washing machine in this disclosure has: a housing; an outer tank oscillatingly supported inside the housing; an inner tank rotatably arranged inside the outer tank, and is set so that the rotation axis is horizontal or inclined from the horizontal ; The motor is arranged inside the housing and is configured to rotate the inner tank on the rotating shaft; the vibration detection part is arranged on the outer tank and is configured to detect the movement information of the outer tank. The outer tank is along the The first axis and the second axis intersect each other in the side view; and the control part is configured to control the motor according to the movement information of the outer tank detected by the vibration detection part, and control the cleaning action, flushing action, and Dehydration action.

During the dehydration operation, the control unit is configured to determine the position of the eccentric load of the inner tank by comparing the operation information of the outer tank as follows, and control the motor according to the determined position of the eccentric load of the inner tank. The movement information of the groove is: when the movement information of the outer groove along one of the first axis and the second axis becomes a maximum value, the movement information of the outer groove along the other axis different from one of the axes, and the When the motion information of the outer groove along one of the axes becomes a minimum value, the motion information of the outer groove along the other axis.

The drum type washing machine in this disclosure can detect the unbalanced load caused by the laundry in the rotating drum, and determine whether the unbalanced load caused by the laundry in the rotating drum is in the front or rear.

form for carrying out the invention Embodiments will be described in detail below while referring to appropriate drawings. However, detailed explanations beyond necessity are sometimes omitted. For example, detailed descriptions of well-known items and repeated descriptions of substantially the same configurations may be omitted. This is because the following description is to be avoided from being unnecessarily lengthy so that those skilled in the art can easily understand it.

In addition, the appended drawings and the following descriptions are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the scope of the patent application by these.

In addition, each figure is a schematic diagram, and is not necessarily a strictly illustrated figure. In addition, in each figure, the same code|symbol is attached|subjected to the substantially same component, and the description may be omitted or simplified. (Embodiment 1)

Hereinafter, Embodiment 1 will be described using FIGS. 1 to 3B.

Fig. 1 is a cross-sectional view of a front-loading washing machine according to Embodiment 1 viewed from the side. In addition, in FIG. 1 , the front-rear direction of the washing machine body is also referred to as the X-axis, the up-down direction is referred to as the Y-axis, and the left-right direction is referred to as the Z-axis. In addition, these axes are shown for convenience only, and do not limit any content of this disclosure.

In FIG. 1 , the water tank 19 is formed in a bottomed cylindrical shape, and is arranged inside the casing 6 . The water tank 19 is elastically supported by a plurality of suspensions 31 and a plurality of anti-vibration dampers 26 so that the central axis becomes lower from the front to the rear. The front part of the water tank 19 is covered with the water tank cover 27 made of resin. A sealing member 23 formed of a resin material is provided between the front portion of the water tank cover 27 and the front portion of the casing 6 . The water tank cover 27 and the water tank 19 constitute a water tank unit 37 . In addition, a synthetic rubber material is included in the resin material forming the sealing member 23 .

The cover 10 is provided to cover the opening of the casing 6 so as to be freely openable and closable. By making the lid 10 open, the user can take out laundry (clothes) and put it into the rotary drum 17 .

Inside the water tank 19, a rotary drum 17 is rotatably arranged. The rotary drum 17 is formed in a bottomed cylindrical shape. That is, the rotary drum 17 has a bottomed cylinder shape. A plurality of water holes 18 are provided on the side of the rotating drum 17 . In addition, a plurality of protruding plates 22 for stirring the laundry are provided on the inner wall surface of the rotary drum 17 . A plurality of protruding plates 22 are respectively inside the rotating drum 17, and will lift the clothes to a predetermined height with the rotation of the rotating drum 17, and then make the lifted clothes fall downward.

One end of the shaft 24 is fixed on the bottom of the rotating drum 17 . The shaft 24 is provided so as to pass through the central axis of the rotary drum 17 and extends to the back of the rotary drum 17 . The shaft 24 is supported through the bottom of the water tank 19 by the bearing 25 . In addition, a bearing box 15 is provided at the bottom of the water tank 19 . The bearing box 15 accommodates the bearing 25 . The other end of the shaft 24 passes through the bearing box 15 and is fixed to a pulley pulley 28 disposed under the bearing box 15 .

Moreover, the drum drive motor 21 is arrange|positioned below the water tank 19. As shown in FIG. A belt 29 is stretched between the drum pulley 28 and the drum drive motor 21 . The rotational driving force by the drum driving motor 21 is transmitted to the rotating drum 17 through the belt 29 , the drum pulley 28 , and the shaft 24 . Thereby, the rotary drum 17 rotates.

A vibration detection device 40 is arranged in front of the upper surface of the sink cover. The vibration detection device 40 is formed by a three-axis acceleration sensor. The vibration detection device 40 detects movement information of the water tank unit 37 along the X-axis and the Y-axis. Specifically, the vibration detection device 40 obtains the acceleration values of the water tank unit 37 along the X-axis and the Y-axis, and detects the vibration amplitude value from the obtained acceleration values.

A control unit 20 is provided behind the casing 6 . The control unit 20 will control a series of operation actions including washing action, flushing action, dehydration action, and drying action according to the instruction input by the user and the monitoring of the operating state of each unit.

Next, the operation of the front-loading washing machine will be described using FIGS. 2A and 2B .

First, the basic operation of the washing operation in this embodiment will be described.

The washing operation is performed in the water tank unit 37, and is composed of the following operations: washing operation, in which the clothes soaked in detergent water are rotated in the rotary drum 17; flushing washing operation, in which the clothes containing the detergent water are rinsed with water; and dehydration operation to dehydrate the clothes containing water.

First, the cleaning operation will be described. The clothes are put into the rotating drum 17 by the user. Then, when the user operates the operation display unit (not shown) of the washing machine, the washing operation starts. After the cleaning operation is started, a predetermined amount of tap water is supplied (water supplied) into the water tank 19 . In addition, water is also supplied to a detergent box (not shown) in which detergent is stored, and detergent water in which detergent is dissolved in water is poured into the water tank 19 . After the water supply is finished, the rotating drum 17 is rotated by the drum driving motor 21, and the cleaning operation will start. During the cleaning action, the clothes will be stirred for a predetermined cleaning time to remove attached dirt and the like.

Next, the flushing washing operation will be described. After the cleaning operation is finished, the dirty washing water will be drained from the sink 19 and transferred to the flushing cleaning operation. The flushing cleaning operation is performed by repeating the flushing cleaning operation and the dehydration operation. During the flushing operation, a predetermined amount of tap water is supplied to the water tank 19, and the rotary drum 17 rotates, and the dirt and washing water removed from the clothes during the washing operation are discharged from the water tank 19. The dehydration operation will be described later. After the flushing cleaning operation is completed, the dehydration operation in the dehydration operation will start.

Next, the dehydration operation will be described. During the dehydration operation, the drum driving motor 21 rotates at a high speed to dehydrate the washing water contained in the laundry. When the dehydration operation starts, the control unit 20 starts the rotation of the rotary drum 17, and increases the rotation speed in stages until the rotation speed of the rotary drum 17 reaches about 800 r/min. The laundry accommodated in the rotary drum 17 will adhere to the inner wall of the rotary drum 17 by the centrifugal force as the rotation speed increases.

When the rotary drum 17 rotates at a high speed, the laundry is not evenly attached to the inner peripheral wall of the rotary drum 17, and the position of the laundry inside the rotary drum 17 becomes an unbalanced state (uneven state), thus causing There is a case where an unbalanced load is generated on the rotary drum 17 . Once an eccentric load is generated, the water tank unit 37 driven by the drum driving motor 21 does not perform a predetermined circular motion, but performs a rotational motion like drawing an ellipse. In this embodiment, in order to detect this unbalanced state, an unbalanced judgment is performed.

Unbalance judgment starts after the rotation speed of rotary drum 17 reaches about 800 r/min. In the unbalance determination, the unbalanced state is detected from the vibration tracks of the rotary drum 17 and the water tank unit 37 .

Fig. 2A is a schematic diagram of a case where an unbalanced load is generated in front of the rotating drum of the front-loading-type washing machine according to the first embodiment. Fig. 2B is a schematic diagram of the case where an unbalanced load is generated behind the rotating drum of the front-loading-type washing machine in the first embodiment. In addition, in FIG. 2A and FIG. 2B , similar to FIG. 1 , the front and rear direction of the washing machine body is also referred to as the X axis, the up and down direction is referred to as the Y axis, and the left and right directions are referred to as the Z axis. In addition, these axes are shown for convenience only, and do not limit any content of this disclosure.

When laundry 50 is in front of rotary drum 17 , rotary drum 17 shakes like an ellipse centered on rotation center A at the rear of rotary drum 17 . In addition, the rotation center A takes a different position depending on the position or amount of the laundry 50 . As the rotary drum 17 shakes, the water tank unit 37 and the vibration detection device 40 vibrate like an ellipse centered on the rotation center A at the rear of the rotary drum 17 .

Therefore, when the water tank unit 37 is viewed from the side, as shown in FIG. 2A , the front of the water tank unit 37 vibrates as if it moves up and down largely.

Similarly, when laundry 60 is placed behind rotary drum 17 , rotary drum 17 shakes like an ellipse centered on rotation center B in front of rotary drum 17 .

Therefore, when the water tank unit 37 is viewed from the side, as shown in FIG. 2B , the rear of the water tank unit 37 vibrates as if it moves up and down greatly.

Next, using FIG. 3A and FIG. 3B , the vibration amplitude value detected by the vibration detection device 40 will be described in the case of an unbalanced load.

FIG. 3A is a schematic diagram plotting vibration amplitude values detected by a vibration detection unit when an unbalanced load exists in front of the drum-type washing machine in Embodiment 1. FIG. 3B is a schematic diagram plotting vibration amplitude values detected by the vibration detection unit when an unbalanced load exists at the rear in the front-loading-type washing machine in Embodiment 1. FIG. In addition, in FIG. 3A and FIG. 3B, similarly to FIG. 1, the front-back direction of a washing machine main body is defined as an X-axis, and the up-down direction is defined as a Y-axis. In addition, in FIGS. 3A and 3B , the vibration amplitude value in the X-axis direction is defined as X, and the vibration amplitude value in the Y-axis direction is defined as Y.

The locus of the vibration amplitude value in FIG. 3A is a higher ellipse on the right. The maximum value of X is defined as Xmax, and the minimum value is defined as Xmin. The value of Y when X=Xmax is defined as Y1, and the value of Y when X=Xmin is defined as Y2. When a partial load exists in front of the washing machine, Y1 will become larger than Y2.

On the other hand, the locus of the vibration amplitude value in FIG. 3B is an ellipse with a higher left side. Similarly, when Y1 and Y2 are obtained when an unbalanced load exists behind the washing machine, Y1 becomes smaller than Y2.

Therefore, by comparing Y1 and Y2, it can be easily judged whether the partial load is in the front or the rear.

Next, the determination processing of the unbalance determination will be described using FIG. 4 .

After a predetermined time elapses after the rotational speed of the rotary drum 17 reaches approximately 800 r/min, the determination process starts (S100).

First, the control unit 20 sets Xmax to "0" and Xmin to "0" as initial values. Similarly, the control unit 20 sets Y1 to "0" and Y2 to "0" (S200).

Next, the control unit 20 obtains the vibration amplitude value detected by the vibration detection device 40 ( S300 ).

Next, the control unit 20 determines whether the acquired value of X is greater than Xmax ( S310 ). In S310, if it is determined that the obtained value of X is greater than Xmax (S310, Yes), the control unit 20 will substitute the value of X into Xmax, and substitute the value of Y into Y1 (S320), and the process will transfer to S400 . In S310, if it is determined that the obtained value of X is not greater (smaller or equal) than Xmax (S310, No), the process will transfer to S330.

Next, the control unit 20 determines whether the acquired value of X is smaller than Xmin ( S330 ). In S330, if it is determined that the obtained value of X is smaller than Xmin (S330, Yes), the control unit 20 will substitute the value of X into Xmin, and substitute the value of Y into Y2 (S340), and the process will transfer to S400 . In S330, if it is determined that the obtained value of X is not smaller (larger or equal) than Xmin (S330, No), the process will transfer to S400.

Next, the control unit 20 determines whether the elapsed time of the iterative process has reached a predetermined time (S400). If it is determined that the elapsed time of repeated processing has not reached the predetermined time (S400, No), the control unit 20 will obtain the vibration amplitude value detected by the vibration detection device 40 again (S300), and determine the value of X ( S310, S330).

If it is determined that the elapsed time of the repeated processing has reached the predetermined time (elapsed predetermined time) (S400, Yes), the control unit 20 compares the value of Y1 and the value of Y2 (S500). If it is determined that the value of Y1 is greater than the value of Y2 or that the value of Y1 is equal to the value of Y2 (S500, No), the control unit 20 will determine that the bias load is forward (S510). Next, the control unit 20 sets the allowable value of the vibration amplitude value to a small allowable value that is relatively lower than a predetermined allowable value ( S520 ), and ends the determination process.

Similarly, if it is determined that the value of Y1 is smaller than the value of Y2 (S500, Yes), the control unit 20 determines that the bias load is at the rear (S530). Furthermore, the control unit 20 sets the allowable value of the vibration amplitude value to a large allowable value that is relatively higher than a predetermined allowable value ( S540 ), and ends the determination process.

In addition, the update time (S300-S400) of the value of X and the value of Y is preferably set to 1/8 or less of the rotation period of the rotary drum 17 . Thereby, the accuracy of determination can be ensured.

In addition, the predetermined time in repeated processing is preferably set to be longer than the rotation period of the rotary drum 17 . By repeating the process from S300 to S400, Xmax, Xmin, Y1, and Y2 can be obtained.

After the determination process is completed, the control unit 20 detects the vibration amplitude value through the vibration detection device 40 and compares it with the allowable value. At this time, as the vibration amplitude values, the maximum value and the minimum value along the X-axis, Y-axis, and Z-axis, respectively, are used. Similarly, values along the X-axis, Y-axis, and Z-axis are also set as allowable values.

In addition, in this embodiment, when the detected vibration amplitude exceeds the allowable value in any of the X-axis, Y-axis, and Z-axis, the control unit 20 determines that the vibration amplitude value is larger than the allowable value. However, the control unit 20 may determine that the vibration amplitude value is larger than the allowable value only when the vibration amplitude value exceeds the allowable value in all of the X-axis, Y-axis, and Z-axis.

When it is determined that the detected vibration amplitude is smaller than the allowable value or the detected vibration amplitude is equal to the allowable value, the control unit 20 will continue the dehydration operation. When it is determined that the detected vibration amplitude is larger than the allowable value, the control unit 20 stops the rotation of the rotating drum 17 and shifts from the spin-drying operation to the correcting action, that is, the correcting flushing action.

First, water is supplied into the rotary drum 17 to perform a correction flushing operation to untangle the laundry. After the correction of the flushing action, the dehydration action will start again.

In addition, when the unbalanced state cannot be eliminated even if the correction flushing operation and the dehydration operation are repeated for a predetermined number of times, the control unit 20 will report the abnormality of the content of the unbalanced state. If abnormal notification has been carried out, the user must make the cover 10 into an open state, then take out the laundry in the rotary drum 17 and untangle it. After eliminating the entanglement, the user puts the laundry into the rotary drum 17, closes the cover 10, and restarts the operation through the operation display unit. When the operation is restarted by the user, the control unit 20 restarts the dehydration operation.

With regard to the judgment processing constituted as above, its function will be described.

When the detected vibration amplitude value is larger than the maximum allowable value, the control unit 20 will stop the dehydration operation and perform a correction operation regardless of whether the bias load is in the front or rear.

When the detected vibration amplitude is smaller than the large allowable value and larger than the small allowable value, the control unit 20 performs different processing when the unbalanced load is in the front and when the unbalanced load is in the rear. That is, when the unbalanced load is in front, the control unit 20 stops the dehydration operation and performs a correction operation. On the other hand, when the partial load is behind, the control unit 20 continues the dehydration operation.

When the bias load is in front, there is a possibility of occurrence of abnormal noise and damage to the shaft 24 . Therefore, when the partial load is in front, it is ideal to correct the unbalanced state. On the other hand, when the bias load is at the rear, the possibility of abnormality will be lower. Therefore, the prolongation of the washing operation time and the excessive use of water (increase in water bill) caused by correcting the flushing water become problems. Therefore, by setting the allowable value to a relatively high large allowable value, correction actions more than necessary are not performed.

As described above, by the control unit 20 switching the allowable value of the vibration amplitude value according to the position of the unbalanced load, it is possible to properly handle the unbalanced state.

As mentioned above, the drum-type washing machine in the present disclosure includes: a housing 6; a water tank unit 37 including a water tank 19 swingably supported inside the housing 6; inside, and set the axis of rotation to be horizontal or inclined from the level; the drum drive motor 21 is arranged inside the housing 6, and is configured to rotate the rotating drum 17 on the axis of rotation; the vibration detection device 40 is equipped with In the water tank unit 37, it is configured to detect the motion information of the water tank unit 37. The aforementioned water tank unit 37 is along the first axis and the second axis that intersect each other in a side view; and the control unit 20 is configured to detect vibration based on The motion information of the sink unit 37 detected by the device 40 is used to control the drum drive motor 21, and to control the cleaning action, flushing action, and dehydration action. During the dehydration operation, the control unit 20 is configured to determine the position of the unbalanced load of the rotary drum 17 by comparing the operation information of the water tank unit 37 as follows, and to control according to the determined position of the unbalanced load of the rotary drum 17. The drum driving motor 21 and the movement information of the water tank unit 37 are: when the movement information of the water tank unit 37 along one of the first axis and the second axis becomes a maximum value, the movement information along the other axis which is different from one of the axes The operation information of the water tank unit 37 and the operation information of the water tank unit 37 along the other axis when the operation information of the water tank unit 37 along one of the axes becomes a minimum value.

In this way, the control unit 20 can directly determine the unbalanced state from the actual measurement value of the vibration detection device 40 . Therefore, the control unit 20 can accurately determine whether the bias load is in the front or rear. Therefore, it is possible to precisely suppress occurrence of an abnormality accompanying the unbalanced load in rotary drum 17 .

Moreover, the control part 20 is comprised so that the position which determines the unbalanced load of the rotating drum 17 may be in front of the rotating drum 17 or behind during the spin-drying operation|movement.

Thereby, the effect can be expected especially in the spin-drying operation with a high rotational speed.

In addition, the control unit 20 is configured to continue the dehydration operation when the operation information of the water tank unit 37 detected by the vibration detection device 40 is smaller or equal to a predetermined allowable value, and is configured to: When the motion information of the water tank unit 37 detected by the vibration detection device 40 is greater than a predetermined allowable value, the rotation of the rotary drum 17 may be stopped.

In this way, different processing can be performed according to the detected motion information.

In addition, the control unit 20 is configured to continue the dehydration operation when the operation information of the water tank unit 37 detected by the vibration detection device 40 is smaller or equal to a predetermined allowable value, and is configured to: When the motion information of the water tank unit 37 detected by the vibration detection device 40 is greater than a predetermined allowable value, the rotation of the rotary drum 17 may be stopped. Moreover, the control unit 20 is configured to set a predetermined allowable value relatively smaller than the predetermined allowable value when it is determined that the position of the unbalanced load of the rotating drum 17 is in front of the rotating drum 17, and is configured to: When the position of the bias load is behind the rotating drum 17, the predetermined allowable value may be set relatively larger than the predetermined allowable value.

Thereby, an allowable value at which no load is applied to the shaft 24 can be set in accordance with the position of the off-load.

In addition, the control unit 20 is configured to stop the rotation of the rotary drum 17 when the motion information of the water tank unit 37 detected by the vibration detection device 40 is greater than a predetermined allowable value during the dehydration operation, and perform the dehydration operation with the dehydration operation. The correction operation is different from the dehydration operation, and the dehydration operation may be started again after the correction operation is completed.

Thereby, when the operation information of the water tank unit 37 is larger than a predetermined allowable value, a correction operation can be performed.

Also, the first axis is an axis parallel to the above-mentioned rotation axis, and the second axis may be horizontal or an axis parallel to an imaginary line connecting the highest position and the lowest position of the front surface of the rotary drum 17 .

Thereby, the control part 20 can judge more accurately that an unbalanced load is front or rear.

In addition, the clothes may be accommodated inside the rotary drum 17 . The control unit 20 is configured to determine the deviation of the laundry accommodated inside the rotary drum 17 , which may be used as the position of the unbalanced load of the rotary drum 17 .

Thereby, it is possible to accurately suppress occurrence of an abnormal load caused by rotating the laundry in drum 17 .

Also, the controller 20 may determine the position of the unbalanced load of the rotary drum 17 after a predetermined time elapses after the number of rotations of the rotary drum 17 reaches a predetermined number of rotations.

Thereby, after the number of rotations of the rotating drum 17 reaches a predetermined number of rotations, the position of the unbalanced load of the rotating drum 17 can be determined.

Also, the vibration detection device 40 may be an acceleration sensor. The vibration detection device 40 is configured to: detect the acceleration of the water tank unit 37 or the vibration amplitude value of the water tank unit 37, which may be used as motion information.

Thereby, the position of the eccentric load in the rotary drum 17 can be determined according to the acceleration or the vibration amplitude value. (Other implementation forms)

As described above, Embodiment 1 has been described as an example of the technique disclosed in this application. However, the technology in the present disclosure is not limited thereto, and can be applied to embodiments in which changes, substitutions, additions, omissions, etc. have been made.

Therefore, other embodiments are illustrated below.

In the first embodiment, the installation position of the vibration detection device 40 in the left-right direction is not limited. That is, the vibration detection device 40 may be installed above the rotating shaft in the upper part of the water tank unit 37 . Also, the vibration detection device 40 may be installed on either side of the top of the water tank unit 37 . In addition, since the vibration detection device 40 is installed at either end of the left and right sides, all the vibration amplitude values of the three axes of the front-back direction, the left-right direction, and the up-down direction can be measured.

In Embodiment 1, as an example of the installation position of the vibration detection device 40, the front upper part of the water tank unit 37 was described. However, as long as the vibration detection device 40 is installed on the water tank unit 37 , the installation location is not limited to the front upper part of the water tank unit 37 . For example, the installation place of the vibration detection device 40 can also be the upper part behind the water tank unit 37 , and can also be the side part and the lower part of the water tank unit 37 .

In Embodiment 1, an example of detecting the movement information of the water tank unit 37 along the X-axis and the Y-axis is described as an example of the detection of the movement information of the water tank unit 37 by the vibration detection device 40 . However, the axes for detecting the movement information of the water tank unit 37 by the vibration detection device 40 are not limited to the X axis and the Y axis. For example, the vibration detection device 40 may be configured to detect movement information of the water tank unit 37 along the first axis and the second axis intersecting each other in a side view.

In Embodiment 1, an example in which the control unit 20 performs determination processing using the vibration amplitude value detected by the vibration detection device 40 has been described. However, the value used by the control unit 20 is not limited to the vibration amplitude value. For example, the control unit 20 may also use the acceleration value detected by the vibration detection device 40 to perform the determination process.

In the first embodiment, the vibration detection device 40 is used as a three-axis acceleration sensor, and the vibration amplitude value is described as an example of the value detected by the vibration detection device 40 . However, as long as the value detected by the vibration detection device 40 is a value that can understand the action of the water tank unit 37, that is, a value that is correlated with the action information of the water tank unit 37, it is not limited to the vibration amplitude value or acceleration. For example, the vibration detection device 40 is a speed sensor, and the value of the speed detected by the vibration detection device 40 is also acceptable. In this case, the control unit 20 may also use the value of the speed detected by the vibration detection device 40 to perform the determination process.

The present disclosure is applicable to a drum type washing machine that may cause shifting of laundry during dehydration.

6: Housing 10: cover 15: Bearing box 17:Rotating Drum 18: water hole 19: Sink 20: Control Department 21: Roller drive motor 22: Protruding board 23: sealing member 24: axis 25: Bearing 26: Anti-vibration damper 27: Sink cover 28: Drum pulley 29: belt 31: Suspension 37: Sink unit 40: Vibration detection device 50, 60: washing A, B: center of rotation X, Y, Z: axes Y1, Y2: value

Fig. 1 is a cross-sectional view of a front-loading washing machine according to Embodiment 1 of the present disclosure viewed from the side.

Fig. 2A is a schematic diagram of a case where an unbalanced load is generated in front of the rotating drum of the front-loading-type washing machine according to Embodiment 1 of the present disclosure.

Fig. 2B is a schematic diagram of a case where an unbalanced load occurs behind the rotating drum of the front-loading-type washing machine according to Embodiment 1 of the present disclosure.

FIG. 3A is a schematic diagram plotting vibration amplitude values detected by a vibration detection unit when an unbalanced load exists in front of the drum-type washing machine according to Embodiment 1 of the present disclosure.

FIG. 3B is a schematic diagram plotting vibration amplitude values detected by the vibration detection unit when an unbalanced load exists at the rear in the drum-type washing machine according to Embodiment 1 of the present disclosure.

Fig. 4 is a flow chart of determining the position of an unbalanced load during the spin-drying operation of the front-loading-type washing machine according to Embodiment 1 of the present disclosure.

Claims (9)

A drum-type washing machine, comprising: a housing; an outer tank oscillatingly supported inside the housing; an inner tank rotatably arranged inside the outer tank, and set so that the axis of rotation is horizontal or inclined from the horizontal ; The motor is arranged inside the aforementioned housing and is configured to rotate the aforementioned inner tank on the aforementioned rotating shaft; the vibration detection unit is arranged in the aforementioned outer tank and is configured to detect motion information of the aforementioned outer tank, The aforementioned outer tank is along the first axis and the second axis that intersect with each other in a side view; and the control unit is configured to control the aforementioned motor based on the aforementioned motion information of the aforementioned outer tank detected by the aforementioned vibration detection unit, and Control the cleaning action, flushing action, and dehydration action. In addition, the aforementioned control unit is configured to determine the position of the partial load of the aforementioned inner tank by comparing the aforementioned action information of the aforementioned outer tank during the aforementioned dehydration action. , and control the aforementioned motor according to the determined aforementioned position of the aforementioned offset load of the aforementioned inner slot, the aforementioned action information of the aforementioned outer slot is: the aforementioned outer slot along one of the aforementioned first axis or the aforementioned second axis When the motion information becomes a maximum value, when the motion information of the outer groove along another axis different from the one axis and the motion information of the outer groove along one of the axes become a minimum value , the aforementioned motion information of the aforementioned outer groove along the aforementioned other axis. The drum-type washing machine according to claim 1, wherein the control unit is configured to determine whether the position of the unbalanced load of the inner tank is in front of or behind the inner tank during the dehydration operation. The drum-type washing machine according to claim 1 or 2, wherein the control unit is configured to: the operation information of the outer tank detected by the vibration detection unit is smaller than a predetermined allowable value or When equal, the dehydration operation is continued, and the configuration is: when the operation information of the outer tank detected by the vibration detection unit is greater than the predetermined allowable value, the rotation of the inner tank is stopped. The drum-type washing machine according to claim 2, wherein the control unit is configured in the dehydration operation: when the operation information of the outer tank detected by the vibration detection unit is smaller or equal to a predetermined allowable value , continue the aforementioned dehydration operation, and be configured to: stop the rotation of the aforementioned inner tank when the aforementioned action information of the aforementioned outer tank detected by the aforementioned vibration detection unit is greater than the aforementioned predetermined allowable value, and be configured to: When it is determined that the aforementioned position of the aforementioned bias load of the aforementioned inner tank is in front of the aforementioned inner tank, the aforementioned predetermined allowable value is set to be relatively smaller than the aforementioned predetermined allowable value. When the position is behind the inner tank, the predetermined allowable value is set to be relatively larger than the predetermined allowable value. The drum-type washing machine according to claim 3, wherein the control unit is configured to: when the operation information of the outer tank detected by the vibration detection unit is greater than the predetermined allowable value, during the dehydration operation, The rotation of the inner tank is stopped, and a correction operation different from the dehydration operation is performed, and after the correction operation is completed, the dehydration operation is restarted. The drum-type washing machine according to claim 1 or 2, wherein the first axis is an axis parallel to the rotation axis, and the second axis is horizontal or parallel to an imaginary line connecting the highest position and the lowest position of the front surface of the inner tank axis. The drum-type washing machine according to claim 1 or 2, wherein the clothes are accommodated in the inner tank, and the control unit is configured to: determine the clothes contained in the inner tank of the inner tank. The offset is used as the aforementioned position of the aforementioned partial load of the aforementioned inner tank. The drum type washing machine according to claim 1 or 2, wherein the control unit determines the position of the eccentric load of the inner tank after a predetermined time elapses after the number of rotations of the inner tank reaches a predetermined number of rotations. The drum-type washing machine according to claim 1 or 2, wherein the vibration detection unit is an acceleration sensor configured to detect the acceleration of the outer tank or the vibration amplitude of the outer tank as the action information.

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