WO2012114741A1

WO2012114741A1 - Drum-type washing machine

Info

Publication number: WO2012114741A1
Application number: PCT/JP2012/001204
Authority: WO
Inventors: 文彦三垣
Original assignee: パナソニック株式会社
Priority date: 2011-02-23
Filing date: 2012-02-22
Publication date: 2012-08-30
Also published as: EP2562301A1; EP2562301B1; EP2562301A4; JP2012170680A; US20130025332A1; CN102812174A

Abstract

This drum-type washing machine is provided with: a rotating drum (31), the axis of rotation (34) of which is horizontal or slanted downwards from the front to the back; a water tank that rotatably encloses said rotating drum (31); and a motor that rotationally drives the rotating drum (31). The rotating drum (31) has a plurality of wall baffles (36) on the interior wall thereof and a plurality of bottom baffles (46) on the inside bottom surface (40). Said wall baffles (36) and bottom baffles (46) are arranged in alternation on a circle centered on the axis of rotation (34), thereby dispersing garments throughout the drum and improving washing performance.

Description

Drum type washing machine

The present invention relates to a drum-type washing machine for washing laundry in a rotating drum.

Heretofore, in this type of washing machine, in order to disperse the laundry, there has been proposed a configuration in which a baffle is provided in the rotating drum, and a configuration in which the shape of the baffle and the shape of the rotating drum are devised For example, refer to Patent Document 1).

FIG. 3 shows a cross-sectional view of a conventional drum-type washing machine described in Patent Document 1. As shown in FIG.

As shown in FIG. 3, a water tank 2 supported by a plurality of suspensions (not shown) is disposed in a housing 1. The water tank 2 has a substantially cylindrical shape that is axially symmetrical around the rotation axis. The rotation axis of the water tank 2 is inclined forward with respect to the horizontal direction so that the bottom 4a side of the water tank 2 is lower than the opening 2a on the front side of the water tank 2. Inside the water tank 2, the drum 4 which has many holes 3 in the surrounding wall is arrange | positioned. The drum 4 is rotationally driven by a drive device 5 such as a motor provided on the bottom of the water tank 2. The drum 4 rotates in both forward and reverse directions (forward and reverse rotation).

At the time of forward and reverse rotation, the clothes A in the drum 4 are lifted by the baffles 6 provided on the peripheral wall in the drum 4 and fall. Thereby, the clothes A are agitated. The baffle 6 extends from the bottom portion 4 a in the drum 4 toward the opening 2 a and protrudes inward in the rotational axis direction of the drum 4. The size of the baffle 6 is larger on the bottom surface 4 a side than on the opening 2 a side.

Assuming that the inner diameter of the bottom surface portion 4a of the drum 4 is D1 and the inner diameter of the front surface portion of the drum 4 is D2, D1 <D2. That is, the drum 4 has a tapered structure in which the diameter of the front surface portion is larger than the diameter of the bottom surface portion (i.e., the tapered structure with the larger diameter on the front surface side).

An auxiliary baffle 21 is provided on the bottom 4 a of the drum 4. The auxiliary baffle 21 is connected to both side surfaces 6 a of the baffle 6 to form an inclined surface 21 a that expands toward the bottom surface 4 a of the drum 4. In any of the forward and reverse rotation of the drum 4, the auxiliary baffle 21 enables the laundry to be moved to the front side of the drum 4.

JP, 2009-22688, A

However, in the conventional configuration, the drum 4 has a tapered structure with a large diameter on the front side, so when the drum 4 rotates, the laundry tends to move to the front side of the drum 4. On the other hand, on the side of the bottom portion 4 a of the drum 4, the peripheral speed of the drum is fast, so the laundry is easily entangled (it is easy to be solidified). That is, since the laundry tangled in the bottom surface portion 4 a of the drum 4 moves to the front side of the drum 4, the laundry can not be efficiently performed. In addition, when the laundry is offset, the inside of the drum 4 becomes unbalanced (unstable state), and vibration is increased at the time of dewatering.

The present invention is to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a drum type washing machine capable of reducing vibration at the time of dewatering by dispersing the laundry by efficiently performing stirring operation. Do.

In order to solve the above-mentioned conventional problems, the drum-type washing machine according to the present invention has a rotating drum arranged horizontally or a rotating drum arranged such that the rotating shaft is inclined downward from the front side to the back side A water tank rotatably containing the rotary drum, and a motor rotatably driving the rotary drum, wherein the rotary drum has a plurality of wall surface baffles on an inner wall surface, and a plurality of bottom surface baffles on an inner bottom surface The wall surface baffles and the bottom surface baffles are alternately arranged on a circumference centered on the rotation axis.

As a result, the agitation operation is performed efficiently to disperse the laundry, whereby the vibration at the time of dewatering is reduced.

The drum type washing machine of the present invention can reduce vibrations at the time of dewatering by dispersing the laundry by efficiently performing the stirring operation.

These aspects and features of the present invention will become apparent from the following description in connection with the preferred embodiments of the attached drawings.
Cross-sectional view of a drum-type washing machine according to an embodiment of the present invention Sectional drawing which shows the bottom part of the rotating drum of the drum type washing machine. Cross section of a conventional drum-type washing machine

According to a first aspect of the present invention, there is provided a rotating drum having a rotating shaft disposed horizontally or having a rotating shaft inclined downward from a front side toward a back side, and a water tank rotatably containing the rotating drum. And a motor for rotationally driving the rotating drum, the rotating drum having a plurality of wall baffles on an inner wall surface, and further having a plurality of bottom baffles on an inner bottom surface, the wall baffle and the bottom baffle It is a drum type washing machine alternately arranged on the circumference centering on the above-mentioned axis of rotation. With such a configuration, the vibration at the time of dehydration can be reduced by efficiently performing the stirring operation to disperse the laundry.

According to a second invention, in the drum-type washing machine of the first invention, the bottom baffle protrudes higher toward the rotation axis of the rotating drum. According to such a configuration, the laundry is pushed out and dispersed to the opening side of the rotary drum.

Before continuing with the description of the present invention, the same parts are given the same reference numerals in the attached drawings. Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited by this embodiment.

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

As shown in FIG. 1, the rotary drum 31 has a bottomed cylindrical shape. A large number of water flow holes 32 are provided on the entire surface of the outer peripheral portion of the rotary drum 31. The water tank 33 rotatably includes the rotating drum 31. The rotation axis (rotation center axis) 34 passing through the rotation center of the rotation drum 31 is disposed so as to incline downward from the front side to the back side of the drum type washing machine. A belt 47 is connected to the rotation shaft 34, and a motor 35 located near the back side of the water tank 33 is connected to the belt 47. By driving the motor 35, the rotary drum 31 is rotationally driven in the normal direction and the reverse direction. The inclination angle of the rotary drum 31 and the rotation shaft 34 with respect to the horizontal direction is, for example, 10 degrees. The inner wall surface of the rotating drum 31 is provided with a plurality of wall surface baffles 36 which are projections for stirring the clothes. The inner bottom surface 40 of the rotary drum 31 is formed with a plurality of bottom surface baffles 46 that protrude higher toward the rotary shaft 34 (closer to the rotation center of the rotary drum 31). In the present embodiment, although the case where the rotation axis is arranged to be inclined downward from the front side to the back side has been described, the rotation axis may be arranged horizontally.

A ring-shaped protrusion 52 is formed on the outer peripheral side of the inner bottom surface of the water tank 33. The gap between the inner bottom surface of the water tank 33 and the outer bottom surface of the rotary drum 31 is reduced by the ring-shaped projection 52 to a size that is acceptable for manufacturing. Thereby, the flow velocity of the wind at the time of dehydration rotation is improved, and the pressure (sound pressure) is reduced. Therefore, wind noise is reduced.

Further, a drive shaft flange 51 for improving the strength of the rotary drum 31 is fixed to the outer bottom surface side of the rotary drum 31.

A water tank unit 60 of a vibration system is configured by the rotary drum 31, the drive shaft flange 51, the water tank 33, the motor 35, and the like.

An opening is provided on the upward inclined surface of the washing machine main body 39 located on the front opening side of the water tank 33, and the opening is covered with a lid 37 so as to be able to open and close. When the lid 37 is opened, the laundry can be taken in and out of the rotating drum 31 through the clothes inlet 38, which is an opening provided in the rotating drum 31.

In the inside of the washing machine main body 39, the vibration proofing member 41 is attached to the lower side, and the spring 48 is attached to the upper side. The water tank unit 60 is swingably supported by the anti-vibration member 41 and the spring 48 so as to be anti-vibration.

One end of a drainage path 42 is connected to the lower portion of the water tank 33. The other end of the drainage path 42 is connected to the drainage valve 43. By connecting the drainage path 42 in this manner, the washing water in the water tank 33 is drained to the outside of the drum-type washing machine.

A feed valve 44 is provided above the inside of the washing machine body 39. A water supply path 45 is connected to the water supply valve 44. The water supply path 45 is in communication with the water tank 33 via the detergent case 53 (not shown in FIG. 1). The water supplied from the water supply path 45 enters the detergent case 53, dissolves the detergent in the detergent case 53, and enters the water tank 33 as washing water. Thus, the water supply valve 44 supplies the wash water into the water tank 33.

Further, a control unit 56 is provided above the inside of the washing machine main body 39. The control unit 56 controls the operation of the motor 35 and the like, and controls each process such as washing, rinsing, and dewatering.

The motor 35 configured by a DC brushless motor or the like is controlled to be variable in forward / reverse rotation and variable in rotational speed by the control unit 56, a drive circuit (not shown), or the like.

In the upper front of the washing machine main body 39, an input setting unit 49 for the user to select a washing course and the like, and a display unit for notifying the user of the selection result, the progress of the process and operation error etc. And 50 are provided.

FIG. 2 is a cross-sectional view of the bottom side of the rotary drum 31 of the drum-type washing machine according to the embodiment of the present invention.

In FIG. 2, as described above, the inner wall surface of the rotary drum 31 is provided with a plurality of wall surface baffles 36 for agitating clothes, and the inner bottom surface of the rotary drum 31 is provided with a plurality of bottom surface baffles 46. ing. The wall surface baffles 36 and the bottom surface baffles 46 are alternately arranged on the circumference centering on the rotating shaft 34 of the rotating drum 31. Although FIG. 2 shows the case where three wall surface baffles 36 and three bottom surface baffles 46 are provided, the number of each of the wall surface baffles 36 and the bottom surface baffles 46 is not limited to this, and can be set as appropriate.

The operation and action of the drum-type washing machine configured as described above will be described below.

After the user opens the lid 37 and inserts the laundry into the rotary drum 31 and inserts a predetermined amount of detergent into the detergent case 53, the user operates the input setting unit 49 to operate the drum type washing machine. Start. When the operation is started, the washing step is first performed (step S1).

In the washing step, the water supply valve 44 is actuated to supply the wash water. The supplied wash water passes through the water supply path 45 and the detergent case 53 and enters the water tank 33 together with the detergent. After the washing water is supplied to a predetermined water level, the motor 35 is controlled to increase the rotational speed of the rotary drum 31 to a predetermined rotational speed. Thereafter, the operation (washing operation) of repeating the cycle is performed for a predetermined time, with the forward rotation, the pause, the reverse, and the pause operation of the rotary drum 31 as one cycle.

At this time, since the plurality of wall surface baffles 36 and the bottom surface baffles 46 are alternately arranged on the circumference, as the rotating drum 31 rotates, the laundry positioned below (the right of the rotating drum 31 in FIG. The laundry located in the lower portion is pushed upward by the bottom baffle 46, and the upward pushed laundry is rotationally moved by the wall baffle 36 and then falls downward. By repeating this operation, the drum-type washing machine according to the present embodiment rotates the laundry three-dimensionally in the rotating drum 31 without entangling the laundry, and performs the washing operation efficiently. Can be dispersed.

Also, the laundry is lifted so as to be held between the wall baffles 36 and the bottom baffles 46. Thus, the laundry is less likely to slip off the wall baffle 36 while being lifted by the wall baffle 36, and is pushed upward and then dropped. Therefore, the tap washing effect is obtained, and the washing performance is improved.

Further, since the bottom baffle 46 projects higher toward the opening of the rotary drum 31 toward the center of the rotary drum 31 (rotary shaft 34), when the laundry reaches the upper side by the rotation of the rotary drum 31, There is an effect of pushing out and dispersing the laundry to the opening side (front side) of the rotary drum 31.

After the washing operation has been performed for a predetermined time, the washing process is finished. Next, a first drainage step (step S2) is performed. After execution of the first drainage step, a rinsing step (step S3) is performed. Also in the rinsing step, the same washing operation as the washing step is performed. Thereafter, the drainage step (step S4) and the dewatering step (step S5) are performed.

As described above, in the drum-type washing machine according to the present embodiment, the plurality of wall surface baffles 36 provided on the inner wall surface of the rotating drum 31 and the plurality of bottom surface baffles 46 provided on the inner bottom surface of the rotating drum 31 , Are alternately arranged on the circumference centering on the rotation axis 34 of the rotation drum 31. With such an arrangement, the laundry is less likely to be entangled during the washing process or the rinsing process, and the laundry is three-dimensionally rotated in the rotating drum 31, and the stirring operation is performed efficiently. Therefore, the washing performance and the rinsing performance are improved, and the laundry is dispersed. Further, the dispersion of the laundry reduces vibration and noise at the time of dewatering.

In addition, the effect which each has is exhibited by combining arbitrary embodiment of the said various embodiment suitably.

As described above, since the washing machine according to the present invention can disperse the laundry without being entangled in the rotating drum and can efficiently perform the washing operation and the rinsing operation, it can be used for other uses such as other washing machines. Applicable

While the present invention has been fully described in connection with the preferred embodiments with reference to the accompanying drawings, various changes and modifications will be apparent to those skilled in the art. Such variations and modifications are to be understood as included within the scope of the present invention as set forth in the appended claims, unless they depart therefrom.

Japanese patent application no. The disclosure content of the specification of 2011-036735, the drawings, and the claims are incorporated in their entirety by reference.

31 rotating drum 33 water tank 34 rotating shaft (rotation center axis)
35 Motor 36 Wall baffle 39 Washing machine main body 46 Bottom baffle 56 Control part

Claims

A rotating drum whose rotation axis is arranged horizontally, or whose rotation axis is arranged inclined downward from the front side to the back side,
A water tank rotatably containing the rotating drum;
And a motor for rotationally driving the rotary drum,
The rotating drum has a plurality of wall baffles on the inner wall surface and further has a plurality of bottom baffles on the inner bottom surface,
The drum type washing machine in which the wall surface baffles and the bottom surface baffles are alternately disposed on a circumference centered on the rotation axis.
The drum type washing machine according to claim 1, wherein the bottom baffle protrudes higher toward the rotation axis of the rotating drum.