JP6553448B2 - Drum type washing machine - Google Patents

Description

  The present invention relates to a drum-type washing machine.

  The washing machine is a machine in which an outer tub that stores water in a casing is supported by vibration isolation, and a drum that is a washing and dewatering tub is rotatably supported in the outer tub via a motor. At the time of the dewatering step, by rotating the drum at a high speed, the laundry contained in the drum is dewatered. At this time, if the laundry in the drum is unbalanced (unbalanced), the unbalance of the centrifugal force generates an exciting force. This excitation force may be transmitted from the drum to the outer tub, and further from the outer tub to the housing through the vibration-proof support structure, resulting in vibration and noise. Therefore, in this type of drum-type washing machine, when it is determined that the imbalance is excessive, the rotation of the drum is once stopped, the imbalance is corrected, and the dewatering is performed again to generate vibration and noise. Is preventing.

  As a conventional technique, Patent Document 1 states that “the lower side of a vibration water tank unit including a drum, a water tank, a motor, and the like is provided in a direction in which the arrangement angle is tilted more than two support dampers and two support dampers. "The washing machine case which is elastically supported rockably by the vibration proofing damper" and "redo operation of dehydration start a predetermined number of times, and reverse operation of dehydration start exceeds the predetermined number, reverse the rotary drum By rotating in the direction of rotation to restart the dehydration start, it is not possible to start dehydration due to an imbalance abnormality, especially when a small amount of clothes is dewatered, without stopping the process halfway, and the process is completed to the end It can be said that it can progress and end.

  Further, in Patent Document 1, “In the case of a small amount of clothes and left rotation, the clothes tend to be lifted at once in the upper right by the rotating drum, so the water tank unit tends to vibrate in the form of a long oval from the lower left to the upper right On the other hand, when the small amount of clothes is turned to the right, the rotating drum easily lifts up to the upper left all at once, and the water tank unit vibrates in the form of a long oval from the lower right to the upper left when viewed from the front As it changes to a tendency, the damping damper becomes easy to damp and start easily. "

JP 2012-170684 A

  However, in the technique disclosed in Patent Document 1, especially when there are many clothes, even if the rotating drum is rotated in the opposite direction to the standard left rotation, the clothes are not easily lifted to the upper left by the rotating drum. The vibration of the above-mentioned is not in the form of a longitudinal ellipse from the lower right to the upper left, and it is difficult to damp the damping damper, so there is a problem that the number of times of dehydration can not be reduced.

  In Patent Document 1, when the dehydration start-up restart operation exceeds a predetermined number of times and the drum is rotated in the reverse direction, the drum is temporarily stopped at a rotation speed lower than the normal rotation speed and then returned to the standard dehydration rotation direction again. However, with this method, imbalances that have been resolved may occur again. Therefore, there is a case where a small unbalanced opportunity is missed. In particular, when clothes are easily entangled and easily unbalanced, there is a problem that the number of dehydration cannot be reduced.

  Therefore, according to the state of clothing, such as when the amount of cloth is large or when the amounts of cloth tend to entangle each other, the number of reworkings of dewatering can not be reduced, and the time for the drum to rotate in one direction becomes longer by reworked dewatering In this case, the clothes may be twisted in the drum rotation direction to easily become unbalanced, which may eventually lead to an extended dewatering time.

  In addition, in Patent Document 1, a small amount of clothing is lifted up to the upper left by a rotating drum and is damped by an anti-vibration damper provided in addition to the support damper. In this method, the drum is rotated and raised with a large unbalance. In addition, since vibration transmission between the water tank unit and the casing is increased by the vibration proof damper, there is a problem that the casing easily vibrates.

  An object of the present invention is to solve the above-described conventional problems, and to provide a drum type washing machine that suppresses vibrations of a housing in a dehydration process and can reduce the number of times of dehydration regardless of a clothing state. .

In order to solve the above problems, an outer tub for storing water, a drum that is a washing and dewatering tub provided rotatably in the outer tub, a motor that rotationally drives the drum, and a casing that forms an outer shell a control unit for controlling the motor, a vibration detecting means for detecting vibration of the outer tub, and a plurality of suspension for anti-vibration supporting the outer tub in the washing machine wherein the suspension, the The damping force is arranged differently on the left and right with respect to the rotating shaft of the drum, and the vibration value detected by the vibration detecting means when the drum rotates toward the target rotational speed in the dehydration step is a predetermined threshold value. or if, there is changing the direction of the rotation, in the dehydration step, the direction of the rotating first run, characterized in that the small direction damping force of the suspension with respect to the rotational axis of the drum Do Beam type washing machine.

  According to the present invention, since the direction of dehydration rotation is changed by dehydration again, and if the vibration is small, the dehydration is completed as it is regardless of the direction of rotation, so that the clothes are prevented from being twisted in one direction and unbalanced. Since dehydration is performed without missing the opportunity to make a small unbalance, there is no need to increase the attenuation to reduce the vibration of the outer tub, and the number of dehydrations can be reduced and the housing can be reduced even when there is a lot of clothing or entanglement. Vibration reduction can be achieved simultaneously.

It is a right view which shows the internal structure of the drum type washing machine which concerns on the example of this Embodiment. Example 1 It is a front view which shows the internal structure of the drum type washing machine which concerns on the example of this Embodiment. Example 1 It is a block circuit diagram of the drum type washing machine which concerns on the example of this Embodiment. Example 1 It is a control flowchart of the spin-drying | dehydration process of the drum type washing machine which concerns on the example of this Embodiment. Example 1 It is an example of the drum rotation pattern in the spin-drying | dehydration process of the drum type washing machine which concerns on the example of this Embodiment. Example 1 It is a front view which shows the internal structure of the drum type washing machine which concerns on the example of this Embodiment. (Example 2) It is a front view which shows the internal structure of the drum type washing machine which concerns on the example of this Embodiment. (Example 3)

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

Example 1
FIG. 1 is a right side view showing the internal structure of the drum type washing machine in this embodiment, and FIG. 2 is a front view showing the internal structure of the drum type washing machine. As shown in FIG. 1, the drum type washing machine is provided with a loading port 1a for taking in and out the laundry at the approximate center of the casing 1 constituting the outer shell, and a door 2 is provided in the loading port 1a. It is attached to open and close freely. The operation panel 3 at the upper part of the housing 1 is electrically connected to a control device 4 for sequentially controlling the operation, and sets the operation course and displays the operation state.

  Inside the housing 1, an outer tub 23 for storing water is supported in a vibration-proof manner by the right suspension 24a, the left suspension 24b (FIG. 2) and the auxiliary spring 25 and includes a drum 21 for storing laundry. . Although the maximum damping force of the right suspension 24a and the left suspension 24b may be the same, in order to reduce the vibration transmission from the outer tank 23 to the housing 1, the right suspension 24a is aligned with the standard rotation direction of the drum 21 described later. It is desirable to make it a little smaller.

  The drum 21 for storing clothing is formed in a substantially cylindrical shape having an opening 21 a and a back surface, and is enclosed in the outer tub 23. The shaft 22a on the back surface of the drum 21 is connected to a motor 22 attached to the back surface of the outer tub 23. The motor 22 causes the drum 21 to rotate counterclockwise (counterclockwise as viewed from the front of the drum 21). And the right rotation (clockwise as viewed from the front of the drum 21), which is opposite to the normal rotation direction, is rotationally driven in both directions.

  A plurality of lifters 21 b for lifting the laundry and a plurality of through holes 21 c for dewatering are provided on the inner peripheral wall of the drum 21. Further, a cylindrical fluid balancer 21 d is provided at the front end of the drum 21. The drum 21 is inclined so that the rotation axis is horizontal or the front side is higher than the rear side.

  The outer tank 23 is formed in a substantially cylindrical shape having a front surface and a rear surface, and includes vibration detection means 27 for detecting vibration of the outer tank 23. The lower part of the outer tub 23 is provided with a water receiving part 23b in which the outer peripheral part of the outer tub 23 protrudes to the outside so that water dehydrated from the clothes can be collected. Between the water receiving portion 23 b and the drum 21, a wall portion 23 c in which the inner peripheral wall of the outer tub 23 extends is arranged so as to cover the upper side of the drain port 13 a on the right side when viewed from the front of the outer tub 23. Yes.

  Below the outer tank 23, a drainage hose 13 having a drainage valve 13b in the path is connected to the drainage port 13a. Moreover, the water supply hose 10 which has the water supply valve 10b and the detergent container 12 in the path | route is connected to the left side seeing from the front of the outer tub 23, and as shown by the arrow of FIG. 2 by opening the water supply valve 10b. Water can be supplied into the outer tank 23 from the water supply port 10a (FIG. 2). The water amount in the outer tank 23 can be detected by the water level detection means 14.

  An opening 23a at the front of the outer tank 23 is connected to the inlet 1a of the housing 1 by a bellows 26 which is an annular packing, and is sealed by water when the door 2 is closed. Further, the inlet 1a of the housing 1, the opening 23a of the outer tub 23, and the opening 21a of the drum 21 are in communication, and by opening the door 2, the laundry can be taken in and out of the drum 21. Yes.

  Here, the arrow of FIG. 2 shows the flow of the water supplied from the water supply hose 10, and the flow of the water which goes to the drainage port 13a. From FIG. 2, the direction of the arrow is substantially parallel to the velocity component of the outer peripheral surface of the drum 21 when the drum 21 rotates in the standard rotation direction (left rotation). That is, when the drum 21 rotates at high speed in the standard rotation direction (left rotation), the water and air flowing in the gap between the outer peripheral surface of the drum 21 and the inner peripheral surface of the outer tank 23 also flow in the same rotational direction as the drum 21 Therefore, resistance to the flow of water supplied from the water supply port 10a and the flow of water toward the drain port 13a is unlikely. In addition, when the positions of the water supply port 10a and the drain port 13a are opposite to each other, the standard rotation direction of the drum 21 is preferably right rotation, and the control described below is also reverse to right rotation and left rotation.

  Here, FIG. 3 is a block diagram of the drum-type washing machine in the embodiment of the present invention. From FIG. 3, the signals of the input setting means 30, the water level detection means 14, the temperature detection means 31, the cloth amount detection means 32, the rotation speed detection means 33, the unbalance detection means 34, and the vibration detection means 27 are electrically connected. Is input to the control device 4. Then, based on the arithmetic processing, the control panel 3, the motor 22, the water supply valve 10b, and the drain valve 13b are controlled. The cloth amount detection means 32 and the unbalance detection means 34 estimate the cloth amount and the unbalance amount by comparing the rotational speed fluctuation and torque current of the motor 22 with preset threshold values. A plurality of threshold values are recorded for each of the detection means. In the following, the unbalance amount detected by the unbalance detection means 34 and the vibration amount detected by the vibration detection means 27 are collectively referred to as a vibration value.

  The operation of the above configuration will be described. When the door 2 is opened, the laundry is put into the drum 21 and a predetermined amount of detergent is put into the detergent container 12, and then the operation is started, the washing process is executed first. In the washing step, the water supplied from the water supply valve 10b is supplied into the outer tub 23 together with the detergent through the detergent container 12 and the water supply hose 10. After this operation is performed for a predetermined time, a stirring operation in which the drum 21 repeats right rotation, stop, left rotation, and stop is repeated for a predetermined time. At this time, the laundry accommodated in the drum 21 is lifted in the rotation direction by the lifter 21b provided on the inner peripheral wall of the drum 21, and the stirring operation of dropping from the raised height position is repeated. The action of tap washing works and it is washed.

  After this operation is performed for a predetermined time, the washing step is ended and the dewatering step is performed. Here, a flowchart of the dewatering process is shown in FIG. In the dewatering step, after the start of the dewatering step (step S101), the drain valve 13b is first opened, and the water in the outer tank 23 is drained out of the machine through the drain hose 13 (step S102). And in order to loosen the entanglement between clothes, the drum 21 performs the loosening operation | movement which performs the stirring operation which repeats a right rotation, a stop, a left rotation, and a stop for predetermined time (step S103). In this loosening operation, right rotation and left rotation may be alternately repeated, either right rotation or left rotation may be continuously rotated, or only one direction may be rotated. . Desirably, the loosening operation is finished in a state of rotating in the direction opposite to the rotation direction of the next step S105, and the clothes are twisted in the direction opposite to the rotation direction of step S105 to uniformly attach the clothes in step S105. When raising the rotation, it is easy to spread while the twisting of the clothes is eliminated. When there is little entanglement between clothes in the washing process (particularly a small amount of clothes), the unraveling operation itself in step S103 may not be performed.

  When the unraveling operation in step S103 is completed, the rotation of the drum 21 is once stopped (step S104), and the drum 21 is rotated upward by left rotation in the standard rotation direction (step S105). The method for raising the rotational speed of the drum 21 may be simple increase, or may be intermittent increase such as deceleration or constant rotation on the way. At this time, in order to prevent the vibration of the outer tank 23 from becoming excessive, the vibration value detected by the unbalance detection means 34 or the vibration detection means 27 is compared with a preset threshold value (step S106).

  In step S106, when the vibration value is smaller than the threshold value, the rotation of the drum 21 is increased to the drainage rotation speed (for example, 100 r / min) (step S107), and the drum 21 is rotated at a constant rotation for T1 seconds (step S108). ). This constant rotation (step S108) at the drainage rotation speed is an operation for gradually draining water from the garment over time at a rotation speed lower than 200 to 400 r / min where the amount of dehydration from the garment is large. According to this, since water can be drained from the clothing before the rotational speed range where the amount of dehydration from the clothing is large, the amount of water flowing into the water receiving portion 23b is prevented from increasing rapidly, and the water receiving portion 23b The temporarily collected water is prevented from overflowing the wall portion 23c and overflowing to the drum 21 side. In the present embodiment, the rotation of the drum 21 in step S108 is constant rotation, but water may be accelerated even if acceleration or acceleration and deceleration are repeated for T1 seconds at an acceleration rate lower than that of the rotation of the drum 21 in step S105. Since it is possible to secure the time for the dropout, the same effect as constant rotation can be obtained. Moreover, when the drainage flow rate of the drainage hose 13 is sufficiently ensured, step S108 is not necessarily performed.

  After T1 seconds have elapsed in step S108, the rotational speed is increased to the target rotational speed (for example, 900 r / min) while comparing the vibration value with the threshold (step S110), similarly to step S105 and step S106 (step S109 and step S106). Step S111). After reaching the target number of rotations, spin rotation is performed by constant rotation until a predetermined time elapses (steps S112 and S113). Then, the rotation of the drum 21 is stopped (step S114), and the dewatering process is ended (step S228).

  On the other hand, if the vibration value is greater than or equal to the threshold value in step S106 or step S110, it is determined that the vibration of the outer tub 23 is excessive, and the rotation of the drum 21 is stopped (step S116). At this time, the clothes that are offset and stuck to the inner wall of the drum 21 by centrifugal force peel off by gravity.

  In step S117, the amount of cloth detected by the cloth amount detecting means 32 is compared with a preset threshold value. When the amount of cloth is smaller than the threshold value (for example, 5 kg or less), it is determined that the amount of water dehydrated from the clothing is small, and the drum 21 is rotated up to the right direction opposite to the standard rotation direction. (Step S118). On the other hand, when the amount of cloth is equal to or greater than the threshold value, it is determined that the amount of water dehydrated from the clothing is large, and after performing the loosening operation (step 115), the process is repeated from step S104. According to this, since the drum 21 is rotated by the right rotation only when the amount of water to be dehydrated is small, as described above, even if the drain port 13a is arranged on the right side of the outer tub 23, the water receiving portion 23b. Water can be prevented from overflowing. If the volume of the water receiver 23b and the diameter of the drain port 13a are large and the drainage flow rate can be secured, the drum 21 may be rotated to the right regardless of the cloth amount without performing step S117.

  In step S118, similarly to step S105, the number of rotations of the drum 21 may be increased by a simple increase, or may be increased intermittently so as to include deceleration or constant rotation. At this time, similarly to step S106, in order to prevent the vibration of the outer tub 23 from becoming excessive, the rotation value is detected while comparing the vibration value detected by the vibration detecting means 27 with a preset threshold value (step S119). The number is increased to, for example, 100 r / min (step S120).

  After reaching the drainage rotation speed, a constant rotation similar to step S108 is performed for T2 seconds longer than T1 seconds of step S108 (step S121). According to this, since the clothes are gradually dehydrated over time, the amount of water flowing into the water receiving portion 23b at a time is smaller than that in step S108 in the rotation speed range where the amount of dehydration from the clothes is large. Therefore, by setting the rotation to the right opposite to the standard rotation direction, even when the flow of water and air generated by the rotation of the drum 21 is reverse to the flow of water toward the drain port 13a, the drain port is not delayed. It can drain from 13a.

  After T2 seconds have passed in step S121, the rotational speed is increased to the target rotational speed (for example, 700 r / min lower than step S111) while comparing the vibration value with the threshold (step S123), as in steps S105 and S106. (Step S122 and step S124). After reaching the target number of rotations, dewatering is performed by performing constant rotation (step S125 and step S126) until a predetermined time elapses. Then, the rotation of the drum 21 is stopped (step S127), and the dewatering process is ended (step S228). The target rotational speed in step S124 is lower than the target rotational speed in step S111, and the predetermined time in step S126 is preferably shorter than the predetermined time in step S113. According to this, although the amount of dewatering from the clothes decreases, the flow speed of water and air generated by the rotation of the drum 21 is slow even when the drum 21 is rotated by the right rotation opposite to the standard rotation direction. Also, the backflow of water and air to the water supply hose 10 can be prevented.

  On the other hand, when the vibration value becomes equal to or greater than the threshold value in step S119 or step S123, the rotation of the drum 21 is stopped as in step S116 (step S104). Then, in order to eliminate the clothing state twisted in the right rotation in step S118, this time, it is raised by the left rotation (step S105). However, if the imbalance cannot be resolved and the state where the vibration value is larger than the threshold value occurs repeatedly many times, it is determined that the dehydration cannot be performed as it is, and the dehydration process is terminated halfway, and the operation panel 3 notifies the user. You may do it.

  Here, an example of the rotation pattern of the drum 21 is shown in FIG. After draining, the loosening operation is performed in which the left rotation and the right rotation in the standard rotation direction are sequentially performed. The number of rotations during the unraveling operation is set higher than the balance number of rotations of gravity and centrifugal force acting on the clothing and lower than the first resonance rotation number of the outer tub 23. Next, the drum 21 is rotated by left rotation in the standard rotation direction. The vibration value detected by the unbalance detection means 34 or the vibration detection means 27 is determined to be equal to or greater than the threshold value in P101, and the rotation of the drum 21 is stopped. Then, the drum 21 is rotated by right rotation this time, but the vibration value is determined to be equal to or greater than the threshold also at P102, and the rotation of the drum 21 is stopped. Similarly, at P103, it is determined that the vibration value is equal to or higher than the threshold, and at P104, it is first determined that the vibration value is smaller than the threshold. At this time, it is a right rotation opposite to the standard rotation direction, but if the vibration value is smaller than the threshold value, it is rotated at 700 r / min for a predetermined time, and the dehydration process is terminated. Note that FIG. 5 is merely an example, and the vibration value may be smaller than the threshold value except for P104, and dehydration may be completed as it is.

  After performing the above dehydration process, the water supply valve 10b is opened and water is supplied, the water passes through the detergent container 12 and the water supply hose 10, and is poured into the outer tub 23, and the rinsing process is performed. In this rinsing step, as in the washing step described above, a stirring operation that repeats the clockwise rotation, pause, counterclockwise rotation, and pause operations is performed for a predetermined time. At this time, since the laundry is lifted in the rotation direction by the lifter 21b provided on the inner peripheral wall of the drum 21 and the stirring operation of dropping from the raised height position is repeated, the detergent component contained in the laundry is diluted. , Rinse is done. Thereafter, the above-described dewatering step and rinsing step are repeated a predetermined number of times, and the final dewatering step is started. The dehydration time in this final dehydration step is set longer than the aforementioned dehydration step.

  As described above, in the present embodiment, even if the dehydration is performed again due to the generated imbalance, the garment is twisted in one direction and unbalance is likely to occur because the dehydration direction is changed each time. Can be prevented. In addition, unlike the loosening operation in which the drum 21 is temporarily stopped regardless of the magnitude of the vibration value, when the vibration value is small, the dehydration is completed regardless of the rotation direction, so there is no chance of losing a small unbalance opportunity. Thus, the number of dehydration attempts can be reduced. Then, if the probability of becoming small imbalance is high, the vibration of the outer tank 23 does not easily increase, so that the damping of the right suspension 24 a and the left suspension 24 b can be reduced, and the outer tank 23 transmits to the housing 1 Vibration is also reduced.

  Therefore, even when there is a lot of clothing or when it is easy to get entangled, the occurrence of unbalance due to the twist of the clothing is suppressed and dehydration is performed with a small unbalance, so that a large attenuation for suppressing the vibration of the outer tub 23 becomes unnecessary. The reduction of the number of reworking of dehydration and the reduction of the vibration of the case can be achieved at the same time.

  Although the drum type washing machine has been described in the present embodiment, the same clothes state can be obtained if the rotation axis of the drum 21 is substantially horizontal, so the drum type washing machine having the drying function, the outer tub 23 The same effect can be obtained when the support is elastically supported by another means. In addition, although the rotation direction of the drum 21 is alternated between left and right, if a small amount of clothing is difficult to get entangled, it is difficult to become entangled even if the drum 21 is rotated in one direction. The same effect can be obtained even if the number of re-doings is 2 or more.

Example 2
FIG. 6 is a schematic view showing the internal structure of the front of the drum-type washing machine in the second embodiment. In FIG. 6, the line OO ′ passing through the rotation center O of the drum 21 is a one-dot chain line, and the flow of water and air flowing through the gap between the drum 21 and the outer tub 23 when the drum 21 rotates at a high speed by clockwise rotation Indicated by a solid arrow. The other configurations and the operation control are the same as in the first embodiment, and the same reference numerals are given and the description is omitted.

  A water supply hose 50 is connected to the outer tank 23 at a water supply port 50a, and the vicinity of the water supply port 50a of the water supply hose 50 is disposed parallel to the line segment OO '. The water supply port 50a is an opening that is provided on the inner peripheral surface of the outer tub 23 and intersects the line segment OO ′ substantially perpendicularly, through which water supplied from the water supply hose 50 passes. That is, when the drum 21 rotates at a high speed by rotating clockwise, the flow of water and air flowing through the gap between the drum 21 and the outer tub 23 flows across the water supply port 50a.

  According to the above configuration, even when the drum 21 is rotated at high speed by right rotation reverse to the standard rotation direction, water or air flows so as to cross the water supply port 50a, so water or air flows into the water supply hose 50. It can be prevented. That is, the target rotational speed in step S124 of FIG. 4 can be set to a higher value (for example, 900 r / min, which is the same as the left rotation), and more water can be drained from the clothing.

  When the water supply hose 50 is disposed from the rear side of the drum 21, the water supply hose 50 is provided on the back surface of the outer tub 23 so that the water supply port 50 a faces the back surface of the drum 21 regardless of the line OO ′. A method of connection may be used. According to this, since the water and air flowing through the gap between the drum 21 and the outer tub 23 flow so as to cross the water supply port 50a regardless of the rotation direction of the drum 21, the same effect can be obtained.

Example 3
FIG. 7 is a schematic view showing the internal structure of the front of the drum-type washing machine in the third embodiment. The water receiving portion 23 b below the outer tub 23 is provided with a first wall portion 70 a and a second wall portion 70 b between the drain port 13 a and the drum 21. The first wall portion 70a is disposed so as to cover the drainage port 13a, and the second wall portion 70b is disposed at a position opposite to the drainage port 13a when viewed from the front of the outer tub 23. The first wall portion 70a and the second wall portion 70b are formed by extending the inner peripheral surface of the outer tub 23 to the water receiving portion 23b. That is, the inner bottom surface of the water receiving portion 23b is configured to directly face the outer peripheral surface of the drum 21 between the first wall portion 70a and the second wall portion 70b. The other configurations and the operation control are the same as in the first embodiment, and the same reference numerals are given and the description is omitted.

  According to the above configuration, even if a large amount of clothing and a large amount of water flow into the water receiving portion 23b in a short time, the water flowing into the water receiving portion 23b is blocked by the first wall portion 70a or the second wall portion 70b. Therefore, it can prevent overflowing from the water receiving part 23b and overflowing to the drum 21 side. Therefore, in step S117 of FIG. 4, the threshold value of the cloth weight can be set higher (for example, 7 kg). In addition, in step S121 of FIG. 4, it is possible to shorten the time T2 of constant rotation for draining water.

  In this embodiment, the drain port 13 a is provided on the right side when viewed from the front of the outer tub 23, but the left side when the drain port 13 a is viewed from the front of the outer tub 23 with the standard rotation direction as the right rotation. The same effect can be obtained when it is provided in Further, the same effect can be obtained by providing the drainage port 13a between the first wall portion 70a and the second wall portion 70b.

1 case 22 motor 4 control device 23 outer tank 21 drum 27 vibration detection means

Claims (3)

An outer tub that stores water, a drum that is a washing and dewatering tub provided rotatably in the outer tub, a motor that rotationally drives the drum, a casing that forms an outer shell, and a control device that controls the motor A washing machine comprising: vibration detecting means for detecting vibration of the outer tub; and a plurality of suspensions for supporting the outer tub in a vibration-proof manner ,
The suspension is disposed with different damping forces to the left and right of the rotation axis of the drum,
In the dehydration step, when the drum rotates toward the target rotation speed, if the vibration value detected by the vibration detection means is equal to or greater than a predetermined threshold, the direction of the rotation is changed.
The drum type washing machine characterized in that the direction of the rotation executed first in the dewatering step is a direction in which the damping force of the suspension is small with respect to the rotation axis of the drum. In claim 1,
A drum type washing machine comprising a water supply hose for supplying water to the outer tub, wherein the water supply hose is connected substantially perpendicularly to the outer peripheral surface or the back surface of the outer tub. In claim 1,
A water receiving portion protruding from a lower portion of the outer tub, and a wall portion provided between the water receiving portion and the drum, and an outer peripheral surface of the drum and an inner side of the water receiving portion at a substantially center of the wall portion. A drum-type washing machine characterized in that the bottom face faces.

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