JP2006223452A - Drum type washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drum type washing machine which reduces vibrations and noise generated in a washing process. <P>SOLUTION: The drum type washing machine is provided with a water tub 2 and a rotary tub 3 arranged so as to be inclined to be lowered at the back inside an outer box 1. A motor 16 for rotationally driving the rotary tub 3 is attached to the rear end face of the water tub 2, and the centroid G of a vibration system is positioned more at the back than an axial direction center. Three main baffles 11 are provided on an axial direction center part of the peripheral wall part inner surface of the rotary tub 3, and three auxiliary baffles 12 are provided on a front end part. The main baffles 11 are arranged at equal intervals in a peripheral direction, and the auxiliary baffles 12 are arranged at the intermediate part of the adjacent main baffles 11. At a dehydrating process, laundry inside the rotary tub 3 is uniformly arranged over the entire periphery on the peripheral wall part inner surface by the action of the main baffles 11, and the laundry positioned at the front part inside the rotary tub 3 is moved to the back part by the action of the auxiliary baffles 12. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a drum-type washing machine having a rotating tub that rotates about a horizontal axis and that is configured to feed laundry into the rotating tub through an opening provided on the front surface thereof.

  The drum type washing machine includes a rotating tub that rotates about a substantially horizontal horizontal axis and a water tub that accommodates the rotating tub, and a plurality of baffles for lifting laundry on the inner surface of the peripheral wall portion of the rotating tub. Is provided. In the washing and rinsing step, the laundry is lifted and dropped by rotating the rotating tub with the water stored in the water tub and the laundry stored in the rotating tub. Thereby, the laundry is beaten. In the dewatering step, the rotating tub is rotated at a low speed to remove moisture contained in the laundry to some extent, and then the laundry is centrifugally dehydrated by gradually increasing the rotating speed of the rotating tub to the maximum speed.

  However, in a drum-type washing machine, if the laundry is placed at the start of the washing operation, for example, because the laundry is thrown into the rotating tub, the offset state is difficult to be resolved even if the washing process proceeds. There is a circumstance. When such an imbalance exists, a large vibration is generated during the dehydration process. For this reason, in conventional drum-type washing machines, a liquid balancer is provided to suppress the generation of large vibrations and noises caused by unbalance, and the rotating tub is rotated forward and backward at the beginning of the dehydration process to correct unbalance. It is rotating. However, the above-described method has a problem that vibration and noise generated in a large drum type washing machine having a large washing capacity cannot be sufficiently suppressed.

In contrast, in a drum-type washing machine having a rotating tub inclined upward, an auxiliary baffle is provided on the rear end plate of the rotating tub in addition to the baffle in order to suppress deterioration in cleaning performance due to imbalance. A configuration is proposed. When the rotating tub is tilted forward, the laundry tends to be shifted to the back. According to the said structure, since the laundry which deviates and exists in the inner part in a rotation tank can fully be stirred, generation | occurrence | production of washing nonuniformity can be suppressed.
JP 2002-315985

  However, the above-described auxiliary baffle is provided for the purpose of stirring the laundry in the inner part of the rotating tub, which could not be stirred by the conventional baffle, and eliminates the imbalance existing in the rotating tub. It is not possible. Moreover, the auxiliary baffle has no effect on the laundry present at the front part in the rotating tub. In a so-called front-loading drum type washing machine having a laundry inlet on the front surface of the outer box, a motor for driving the rotating tub is attached to the rear of the water tub, so that the center of gravity of the vibration system is the center of the rotating tub in the axial direction. Located at the rear. For this reason, if there is an unbalance in the front part of the rotating tank, it causes a large vibration.

  This invention is made | formed in view of the said situation, The objective is to provide the drum type washing machine which can reduce the vibration and noise which generate | occur | produce in a washing process.

  The drum-type washing machine of the present invention includes an outer box having a laundry input port on the front surface, a water tank disposed in the outer box via elastic support means, and a rotational drive provided around the horizontal axis provided in the water tank. A rotating tank, a driving means provided on the rear outer surface of the water tank for rotationally driving the rotating tank, and a front baffle provided at the front of the inner surface of the peripheral wall of the rotating tank and extending along the axial direction of the rotating tank It is characterized by providing.

  According to the drum type washing machine of the present invention, when the rotating tub is rotated during the washing operation, the laundry positioned at the front end in the axial direction of the rotating tub moves backward in the rotating tub by the action of the front baffle. . Since the drum-type washing machine is provided with driving means on the rear outer surface of the water tub, the center of gravity of the vibration system is located behind the axial center of the rotating tub. Accordingly, the laundry present at the front portion in the rotating tub is moved rearward, so that an unbalance is prevented from being generated in a portion away from the center of gravity. Therefore, it is possible to prevent a large vibration from occurring during the dehydration process.

A first embodiment in which the present invention is applied to a drum-type washing machine with a drying function will be described below with reference to FIGS.
First, the overall configuration of the drum type washing machine according to the present embodiment will be described with reference to FIGS. 1 and 2. The drum-type washing machine includes an outer box 1, a cylindrical water tank 2 disposed inside the outer box 1, and a cylindrical rotating tank 3 disposed rotatably inside the water tank 2. A laundry doorway 5 that is opened and closed by a door 4 is provided at the center of the front portion of the outer box 1. An operation panel 6 is provided at the upper part of the front surface of the outer box 1, and an operation circuit unit 7 is disposed in the outer box 1 and at the rear of the operation panel 6. The operation panel 6 includes a setting switch 6a for performing various settings relating to the washing operation and a display unit 6b for performing various displays relating to the washing operation. A control circuit unit 8 is disposed at the lower portion of the front portion in the outer box 1.

  The said water tank 2 is arrange | positioned in the state inclined in the back downward so that the axial centerline may extend in the front-back direction. The water tank 2 is supported by a pair of left and right elastic support devices 9. The rotating tub 3 functions as a washing tub, a dewatering tub, and a drying tub, and is arranged such that its axial direction substantially coincides with the axial direction of the water tub 2. A large number of small holes 3a functioning as water holes and vent holes are provided in substantially the entire peripheral wall portion of the rotating tub 3. A ring-shaped liquid balancer 10 is attached to the front end portion in the rotary tank 3.

  As shown in FIG. 1 and FIG. 4, three triangular baffle main baffles 11 (corresponding to a central baffle) are attached to the inner surface of the peripheral wall portion of the rotating tub 3. The three main baffles 11 are arranged at substantially equal intervals, and are arranged at substantially the center in the axial direction of the peripheral wall portion so as to be separated from the front and rear end faces of the rotating tub 3 by substantially the same distance. As will be described later, the main baffle 11 has a function of lifting the laundry in the rotating tub. Further, for example, three auxiliary baffles 12 (corresponding to front baffles) are attached to the front portion of the inner surface of the peripheral wall portion of the rotating tub 3. The auxiliary baffle 12 is disposed between the adjacent main baffles 11. The auxiliary baffle 12 has a substantially triangular pyramid shape that tapers from the front end face toward the rear in the axial direction. The front end surface of the auxiliary baffle 12 is in contact with the rear end surface of the balancer 10 and is engaged with the balancer 10 by an engaging portion (not shown). Moreover, the outer peripheral surface of the auxiliary baffle 12 is in contact with the peripheral wall portion of the rotating tub 3, and is fixed to the peripheral wall portion by screws. That is, in the present embodiment, the front end surface of the auxiliary baffle 12 is attached to the rotating tub 3 using the balancer 10.

Openings 13 and 14 for taking in and out the laundry are provided on the front surfaces of the water tub 2 and the rotating tub 3, respectively. The opening 13 of the water tub 2 is watertightly connected to the laundry entrance / exit 5 by a bellows 15. Note that the inner diameter of the balancer 10 is set to be slightly smaller than the inner diameter of the opening 14.
On the rear surface of the water tank 2, a motor 16 is disposed as a rotational drive means for rotationally driving the rotary tank 3. The motor 16 is composed of an outer rotor type brushless motor, and includes a stator 16a and a rotor 16b. A bearing housing 27 having a bearing 27a is fixed substantially at the center of the rear surface of the water tank 2, and the stator 16a is fixed to the outer periphery thereof. The rotating shaft 16c of the rotor 16b is rotatably supported by the bearing 27a. A front portion of the rotating shaft 16c extends through the rear wall portion of the water tank 2 into the water tank 2, and a rear surface of the rotary tank 3 is fixed to a front end portion thereof. In FIG. 1, an alternate long and short dash line indicated by “O” indicates the center of the rotating shaft 16c (that is, the rotating center axis of the rotating tub 3).

  A water reservoir 17 projecting downward is provided on the lower surface of the water tank 2. A heating element 18 is disposed inside the water reservoir 17. The heating element 18 is made of, for example, a sheathed wire and has a function of heating the washing liquid in the water tank 2. A drain port 19 is provided at the rear of the water reservoir 17, and a drain hose 20 is connected to the drain port 19 via a drain valve (not shown).

  On the other hand, a blower 21 is disposed at the upper part of the water tank 2. A heater 22 is disposed at the front of the blower 21 in the upper part of the water tank 2. The blower 21 includes a blower blade 21 a provided inside the casing 23, and a motor 21 b provided outside the casing 23 to rotationally drive the blower blade 21 a. The heater 22 includes a case 22a and a heating element 22b for generating hot air provided in the case 22a. The inlet portion of the case 22 a communicates with the outlet portion of the casing 23. The outlet portion of the case 22 a is connected to the water tank 2 through a duct 24.

  A hollow heat exchanger 25 is disposed on the left side of the motor 16 in the rear surface of the water tank 2. An air inlet (not shown) that also serves as a water outlet is provided in a portion of the rear end plate of the water tank 2 corresponding to the lower portion of the heat exchanger 25. The upper part of the heat exchanger 25 communicates with the casing 23 of the blower 21 through a duct 26. A water injection pipe (not shown) is disposed in the upper part of the heat exchanger 25. The water injection type is a water-cooling type in which water injected from the water injection pipe and the air inside are cooled by heat exchange and dehumidified. is there.

  Although not described in detail, the outer box 1 is provided with a water supply device (not shown) for supplying water into the water tank 2. The water supply apparatus includes a water injection case (not shown) and a detergent charging case 27 that is housed in the water injection case so as to be drawable. By storing the detergent charging case 27 in the water pouring case with the detergent inside, the detergent is supplied into the water tank 2 together with water.

  In the drum type washing machine, the center of gravity of the vibration system including the water tank 2, the rotating tank 3, the motor 16 and the like that applies a load to the elastic support device 9 among the components is on the rotation center axis O, and the rotation It is comprised so that it may be located in the back of the axial direction center of the tank 3 a little. In FIG. 1, the center of gravity of the vibration system is indicated by a point G.

  Next, the operation of the above configuration will be described. The drum type washing machine is controlled in its entirety by a control microcomputer (not shown) provided in the control circuit unit 8. When the laundry is stored in the rotating tub 3 and the operation start instruction is given, the control microcomputer executes each process according to the set operation course. For example, when a standard driving course washing operation is started, the control microcomputer sequentially executes a washing process, a rinsing process, a dehydrating process, and a drying process.

  Specifically, in the washing process and the rinsing process, the control microcomputer drives the water supply device to drive the motor 16 in a state where the washing water is supplied to the predetermined water level in the water tank 2, and the rotating tank 3 is moved in the forward and reverse directions. Rotate slowly. As the rotating tub 3 is rotated forward and backward at a low speed, the laundry stored in the rotating tub 3 is repeatedly lifted by the main baffle 11 together with the water in the water tub 2 and then dropped. Rinse is performed. In this case, since the laundry contains moisture and is heavy, and because the rotating tub 3 is inclined downwardly, most of the laundry is moved closer to the rear in the rotating tub 3 due to the action of gravity. To position. For this reason, although the effect | action with respect to the laundry of the auxiliary baffle 12 is small, for example, when the laundry is located in the front part in the rotating tub 3 because the amount of the laundry is large, the laundry is rotated by the action of the auxiliary baffle 12. 3 is moved rearwardly.

  In the dehydration process, the control microcomputer drives the drainage device (drainage valve) to discharge the water in the water tank 2 and then drives the motor 16 to rotate the rotary tank 3 in one direction at a low speed of about 40 rpm. Laundry that contains a large amount of water and is heavy at the end of drainage is located in the lower part of the rotating tub 3. Therefore, when the rotating tub 3 is rotated at a low speed, the laundry is lifted by the main baffle 11 and then dropped. Thereby, the moisture contained in the laundry is removed to some extent.

  Subsequently, the control microcomputer drives the motor 16 to rotate the rotating tub 3 in one direction at a rotation speed of about 60 to 80 rpm. At this time, the laundry in the rotating tub 3 is moved in the rotating tub 3 by the main baffle 11 and sticks uniformly to the entire peripheral wall portion. In addition, the laundry located at the front portion in the rotating tub 3 is moved backward in the rotating tub 3 by the auxiliary baffle 12.

Here, the process in which the laundry in the rotating tub 3 sticks uniformly to the entire peripheral wall will be described with reference to FIGS. 3 and 4. As shown in FIG. 3, the centrifugal force F acting on the laundry S in the rotating tub 3 is the distance from the rotation center axis O of the rotating tub 3 to the center of gravity of the laundry S, and the mass of the laundry S is m. If the rotational angular velocity is ω, the following is defined.
F = m · r · ω ² (1)
As shown in the above formula (1), the centrifugal force F is proportional to the distance r. For example, as shown in FIG. 3, when the laundry S is present in the rotating tub 3 with a thickness a, the laundry S1 located on the outer peripheral portion and the laundry S2 located on the inner peripheral portion are r1 in FIG. , R2, the distance from the rotation center O of the rotating tub 3 is different (r1> r2). Accordingly, the centrifugal force acting on the laundry S1 is larger than the centrifugal force acting on the laundry S2. For this reason, among the laundry lifted by the main baffle 11, the laundry S1 located on the outer peripheral portion sticks to the peripheral wall portion without falling, and the laundry S2 located on the inner peripheral portion falls. As a result, the laundry in the rotating tub 3 is gradually dispersed and sticks uniformly to the entire peripheral wall portion.

On the other hand, the laundry located at the front portion of the rotating tub 3 is lifted by the auxiliary baffle 12 because the moisture is removed and lightened. At this time, since the auxiliary baffle 12 has a triangular pyramid shape, the laundry is moved backward in the rotating tub 3. As a result, the laundry in the rotating tub 3 is in a state of being moved backward.
In this way, the laundry in the rotating tub 3 is gradually dispersed over the entire inner surface of the peripheral wall portion, and unbalance is reduced. Moreover, the amount of laundry that exists in the rear in the rotary tub 3 is larger than the amount of laundry that exists in the front by the above-described operation.

  When the control microcomputer determines that the laundry has evenly adhered to the peripheral wall portion of the rotating tub 3, the control microcomputer drives the motor 16 to increase the rotation speed of the rotating tub 3 to about 100 rpm. The determination as to whether or not the laundry has evenly adhered to the peripheral wall portion of the rotating tub 3 is made, for example, by detecting fluctuations in the rotational speed of the motor 16 (that is, uneven rotation) during one rotation of the rotating tub 3. Do. This rotational speed (100 rpm) is set to a rotational speed at which the centrifugal force applied to all the laundry in the rotating tub 3 exceeds the gravitational acceleration. Accordingly, here, the rotating tub 3 rotates with all the laundry in the rotating tub 3 stuck to the peripheral wall portion.

  Thereafter, the control microcomputer drives the motor 16 to raise the rotating tub 3 to a maximum speed of 900 to 1200 rpm. As a result, the laundry rotates together with the rotating tub 3 while being stuck to the inner surface of the peripheral wall portion, and is centrifugally dehydrated. The control microcomputer reduces the rotation speed and causes the laundry in the rotation tub 3 when a large vibration occurs at a plurality of resonance points that appear while the rotation speed of the rotation tub 3 is increased from 100 rpm to the maximum speed. Is moved to correct the unbalance causing the resonance vibration. Then, after correcting the imbalance, the rotational speed of the rotating tub 3 is increased again to the maximum speed.

Here, the vibration generated during dehydration will be described with reference to FIG. The magnitude of vibration generated at the time of dehydration is determined by unbalanced force (excitation force). The magnitude of the excitation force is determined by the centrifugal force applied to the laundry S and the moment of inertia around the center of gravity acting on the laundry S. The moment of inertia M is defined as follows, where G1 is a surface passing through the center of gravity of the vibration system and orthogonal to the rotation center axis O, and L is the distance from the surface G1 to the center of gravity of the laundry S.
M = F · L = m · r · ω ² · L (2)
As described above, F is a centrifugal force acting on the laundry. As shown in the above equation (2), the moment of inertia M is proportional to the distance r and the distance L. As described above, the centrifugal force F is proportional to the distance r. In this embodiment, the center of gravity of the vibration system is located behind the axial center of the rotating tub. Therefore, the vibration caused by the unbalance existing behind the rotating tank 3 is smaller than the vibration caused by the unbalance existing before the rotating tank 3.

  In this embodiment, since the laundry is moved rearward from the axial center of the rotating tub 3, there are many unbalances near the center of gravity of the vibration system. Therefore, as compared with the conventional drum type washing machine in which the entire inner surface of the peripheral wall portion of the rotating tub 3 is unbalanced, vibration generated during the dehydration process can be reduced.

  5 and 6 show that the rotation speed of the rotating tub 3 is in a steady state (the maximum rotation speed) when the drum-type washing machine having the main baffle 11 and the auxiliary baffle 12 and the drum-type washing machine having only the main baffle 11 are dehydrated. The vibration generation amounts (amplitude in the vertical direction (mm)) of the water tank 2 and the outer case 1 when a predetermined time has passed since reaching this are shown. 5 and 6, the horizontal axis indicates the amount of cloth (the amount of laundry), and the vertical axis indicates the amplitude (mm). 5 and 6, the amplitude of a drum type washing machine having an auxiliary baffle 12 is indicated by a solid line A, the amplitude of a drum type washing machine not having an auxiliary baffle 12 is indicated by a solid line B, and the measurement site is shown in parentheses. It shows. In addition, the measurement site | part of the amplitude shown in FIG. 5 is a site | part shown by P1, P2 in FIG. 1, respectively. Further, the amplitude measurement parts shown in FIG. 6 are parts indicated by Q1 and Q2 in FIG. 2, respectively.

  As is clear from FIGS. 5 and 6, the larger the amount of laundry, the larger the amplitude tends to be. In particular, the tendency is remarkable in the amplitude of the outer box 1. When the amount of laundry is small (1 kg, 3 kg), the washing machine with the auxiliary baffle 12 has a larger amplitude than the washing machine without the auxiliary baffle 12, but otherwise Then, the washing machine with the auxiliary baffle 12 has a smaller amplitude than the washing machine without the auxiliary baffle 11. That is, when the laundry has a large capacity and a large vibration is generated during dehydration, an effect of reducing the amount of vibration generated is observed. In addition, the amplitude of the outer box 1 is smaller in the washing machine including the auxiliary baffle 12 than in the washing machine not including the auxiliary baffle 12 in all laundry quantities.

  Thus, according to the present embodiment, by providing the auxiliary baffle 12 in the rotating tub 3, the laundry in the rotating tub 3 can be moved backward during the dehydration process, in other words, moved to the vicinity of the center of gravity of the vibration system. . For this reason, generation | occurrence | production of the vibration and noise at the time of a spin-drying | dehydration process can be suppressed. Moreover, since the laundry located in the front part of the rotating tub 3 can be efficiently moved rearward by the auxiliary baffle 12, the operation time for correcting the unbalance can be shortened.

  Further, in the drying process, the laundry is moved in the rotating tub 3 while being repeatedly dispersed and concentrated by the cooperation of the main baffle 11 and the auxiliary baffle 12. In particular, in this embodiment, since the auxiliary baffle 12 is provided in the middle of the main baffle 11, the auxiliary baffle 12 is separated from any main baffle 11. Therefore, the main baffle 11 and the auxiliary baffle 12 can efficiently move the laundry in cooperation. For this reason, it is possible to improve the drying efficiency and reduce the tangling of the laundry. According to the experiments by the inventors, when the washing operation is performed using the drum type washing machine having the auxiliary baffle 12, the washing rate is improved as compared with the conventional drum type washing machine and the laundry is finished at the end of drying. It was found that the amount of wrinkles generated was reduced. Therefore, according to the said structure, there also exists an effect that a laundry can be finished in a favorable state.

  Further, according to experiments by the inventor, the configuration in which the auxiliary baffle 12 is disposed in the middle portion of the main baffle 11 is more efficient than the configuration in which the auxiliary baffle 12 is disposed close to any of the adjacent main baffles 11. It turns out that things can be moved backwards. This is considered to be because the influence of the main baffle 11 on the operation of the auxiliary baffle 12 is reduced by moving the auxiliary baffle 12 away from any main baffle 11. Furthermore, in the washing process, the rinsing process, and the drying process, the rotating tank 3 rotates in both forward and reverse directions. Therefore, it is desirable that the effects of the main baffle 11 and the auxiliary baffle 12 on the laundry are equal even when the rotating tub 3 rotates in any direction. In consideration of this point, it is considered that a configuration in which the main baffles 11 are arranged at equal intervals and the auxiliary baffles 12 are arranged in the middle portion of the main baffles 11 is effective.

FIG. 7 shows a second embodiment of the present invention, and the differences from the first embodiment will be described. The same parts as those in the first embodiment are denoted by the same reference numerals.
In this embodiment, the auxiliary baffle 12 and the balancer 10 are integrally formed. With such a configuration, the trouble of attaching the auxiliary baffle 12 to the balancer 10 can be saved, so that the number of assembling steps of the drum type washing machine can be reduced.

FIG. 8 shows a third embodiment of the present invention, and different points from the first embodiment will be described. The same parts as those in the first embodiment are denoted by the same reference numerals.
The present embodiment is different from the first embodiment in that the liquid balancer 10 is not provided. In such a configuration, the front end surface of the auxiliary baffle 12 is directly fixed to the front end surface of the rotating tub 3 by screws.

The present invention is not limited to the above-described embodiments, and for example, the following modifications are possible.
In the above embodiment, the example in which the present invention is applied to a drum type washing machine provided with a motor that is attached to the rear end surface of the water tank and directly drives to rotate the rotating tank has been described. It can be applied to a drum-type washing machine having a motor that is fixed to the motor and that rotates the rotating tub via a belt. In short, the motor is fixed to the rear half of the outer peripheral surface of the water tank, and the center of gravity of the vibration system is located behind the center in the axial direction of the rotating tank. An effect is obtained.
You may form an auxiliary baffle by press-molding the surrounding wall part or end plate of a rotary tank. According to the said structure, an auxiliary | assistant baffle and a rotation tank can be comprised integrally, and an assembly process can be decreased.
The auxiliary baffle is not limited to a triangular pyramid shape, and may be, for example, a semiconical shape.
The present invention can also be applied to a drum-type washing machine that does not have a drying function.

1 is a longitudinal side view of a drum type washing machine showing a first embodiment of the present invention. Front view Diagram for explaining the magnitude of the centrifugal force applied to the laundry and the moment of inertia around the center of gravity The figure for demonstrating the difference of the centrifugal force concerning the laundry located in the outer peripheral part in a rotation tank, and the centrifugal force concerning the laundry located in an inner peripheral part The figure which shows the difference with the presence or absence of the auxiliary baffle of the vibration which occurs in the water tank at the time of dehydration The figure which shows the difference by the presence or absence of the auxiliary baffle of the vibration which occurs in the outer case at the time of dehydration FIG. 1 equivalent view showing a second embodiment of the present invention. FIG. 1 equivalent view showing a third embodiment of the present invention.

Explanation of symbols

  In the drawings, 1 is an outer box, 2 is a water tank, 3 is a rotating tank, 5 is a laundry inlet, 10 is a liquid balancer, 11 is a main baffle (central baffle), 12 is an auxiliary baffle (front baffle), and 16 is a motor. (Driving means) is shown.

Claims (5)

An outer box having a laundry inlet on the front;
A water tank disposed in the outer box via elastic support means;
A rotating tub provided in the water tank and driven to rotate about a horizontal axis;
Drive means provided on the rear outer surface of the water tank to drive the rotation tank;
A drum type washing machine comprising: a front baffle provided at a front portion of an inner surface of a peripheral wall portion of the rotating tub and extending along an axial direction of the rotating tub.   The front baffle is provided so as to be close to the front end plate of the rotating tub, and has an inclined surface that inclines in the peripheral wall portion of the rotating tub from the axial front portion to the rear portion of the rotating tub. The drum type washing machine according to claim 1. Provided near the center in the axial direction of the inner surface of the peripheral wall portion of the rotating tub, comprising a plurality of central baffles for lifting the laundry in the rotating tub,
The drum type washing machine according to claim 1 or 2, wherein the front baffles are arranged so that distances from two adjacent central baffles are substantially equal. With a balancer provided at the front end of the rotating tank,
The drum type washing machine according to any one of claims 1 to 3, wherein the front baffle is attached to the rotating tub using the balancer. The drum type washing machine according to any one of claims 1 to 4, wherein the front baffles are arranged at equal intervals in the circumferential direction of the rotating tub.

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