JPH11300091A - Dewatering machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To partially concentrate water which is contained in articles to be dewatered at the time of a dewatering, and improve the dewatering rate of the articles to be dewatered by providing the dewatering machine with, on the side wall of a dewatering tank which is rotated at a high speed, a protruding parts being intermittent in the vertical direction, so that the parts, where no protruding parts exist, may not be adjacent to each other. SOLUTION: A dewatering tank 11 is formed of stainless steel or the like, and on the side wall 12, a plurality of protruding parts 13 being intermittent in the vertical direction, and provided in approx. parallel, and at the same time, the protruding parts 13 are formed in such a manner that the parts 14, where no protruding parts 13 exist, may not be adjacent to each other. When articles 15 to be dewatered are placed in the dewatering tank 11, and the dewatering tank 11 is rotated at a high speed, on the articles 15 to be dewatered, an unevenness is formed along the side wall 12 by the protruding parts 13 which are provided on the side wall 12 of the dewatering tank 11, and water contained in the articles 15 to be dewatered is concentrated on the bottom part 16 of the unevenness by a centrifugal force, and floating water to which the surface tension of the articles 15 to be dewatered is not applied, can be increased. In addition, by preventing the broken parts 14 of the adjacent protruding parts 13 from being adjacent, parts where water is hard to remove, are prevented from being concentrated, and by this method, the dewatering rate is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dehydrator using centrifugal force generated by high-speed rotation, such as an electric washing machine used for washing clothes.

[0002]

2. Description of the Related Art Conventionally, in washing clothes and the like, washing using water as a solvent is common, and centrifugal spin-drying by rotation is often used to increase the efficiency of rinsing and to speed up drying. A washing machine utilizing this centrifugal dehydration is shown in FIG.
It was configured as shown in FIG. Hereinafter, the configuration will be described.

[0003] As shown in FIG. 10, an outer shell 1 is substantially rectangular, and a water receiving tank 3 is suspended from a corner of the outer shell 1 via a hanging rod 2. A washing and dewatering tub (dewatering tub) 4 is rotatably disposed inside the water receiving tub 3, and a stirring blade 5 is rotatably disposed at the bottom of the washing and dewatering tub 4. The mechanism section 6 has a rotation reduction mechanism, a rotation braking mechanism, a transmission switching mechanism, and the like, and transmits the rotation of the motor 7 to the washing and dewatering tub 4 and the stirring blade 5 via the belt 8. Holes 9 and grooves 10 are provided in the side wall of the washing and spin-drying tub 4, and the washing and spin-drying tub 4 is rotated at a high speed in a state where clothes containing water are put thereinto, and the water is shaken and centrifuged by centrifugal force to wash and remove the water. It is configured to be taken out of the water tank 4.

[0004]

However, the conventional centrifugal dehydration has a problem that there is a certain limit in increasing the dehydration rate. The weight of the dried clothes is measured, and the clothes are sufficiently impregnated, centrifugally dehydrated, and the weight of the dehydrated clothes is measured. Thus, it is easily understood that a large amount of water is still contained. The amount of residual water varies depending on the material of the clothing, but cotton clothing, which is commonly used, has a large amount of residual water.

[0005] In addition, when dehydration is performed after using a clothing whose color changes according to the water content, the water gradually moves outward from the center of rotation, and the reduced water portion spreads in a circular shape. Can also be seen from the fact that a large amount of water can be observed in the outermost part of the clothing. In clothing, the surface tension acting on water is the same, so that when water is subjected to centrifugal force, it moves in the outer peripheral direction. In addition, at the outermost periphery where water jumps out of clothing, floating water on which surface tension does not act easily jumps out of clothing by centrifugal force, but surface water on which surface tension of clothing acts is a tension between centrifugal force and surface tension. It is thought that it is difficult to jump out of the clothes. Therefore, it is considered that there is a certain limit in the dehydration rate due to the centrifugal force as described above.

The present invention has been made to solve the above-mentioned problems. In the present invention, the water contained in the material to be dehydrated is partially concentrated at the time of dehydration, the amount of floating water on which surface tension does not act is increased, and the water contained in the material to be dehydrated is dehydrated. It is a first object of the present invention to improve the dehydration rate of an object to be dehydrated by making it easier to get out of the object.

A second object of the present invention is to gradually change the rotation speed of the dewatering tub to efficiently perform dehydration and to minimize wrinkles.

[0008]

According to the present invention, in order to achieve the first object, a rotatable dewatering tank is rotated at a high speed, and water in the material to be dewatered is dewatered by centrifugal force. Then, the dewatering tank is provided with convex portions intermittent in the vertical direction on the side wall,
In this case, the cut portions of the adjacent convex portions are not adjacent to each other.

[0009] Thereby, the water contained in the object to be dehydrated can be partially concentrated during dehydration, and the amount of floating water on which surface tension does not act can be increased. As a result, the dewatering rate of the material to be dehydrated can be improved.

In order to achieve the second object, a rotatable dewatering tub is rotated at a high speed to dewater water in the object to be dewatered by centrifugal force. A first rotation speed at which the object to be dehydrated is spread on the inner wall of the dewatering tub, a second rotation speed at which water in the dewatering object is squeezed, and a third rotation speed higher than the second rotation speed. The setting is such that the number of revolutions is increased stepwise including steps.

[0011] Thus, the rotation speed of the dewatering tub is gradually changed, so that dewatering can be performed efficiently and wrinkles can be minimized.

[0012]

DETAILED DESCRIPTION OF THE INVENTION The invention according to claim 1 of the present invention is configured such that a rotatable dewatering tank is rotated at a high speed to dewater water in an object to be dewatered by centrifugal force. The water tank is provided with convex portions interrupted in the vertical direction on the side wall so that the cut portions of the adjacent convex portions do not adjoin, and the convex portion makes the object to be dehydrated uneven along the side wall of the dewatering tank. Is formed, and the water contained in the object to be dehydrated is concentrated on the bottom of the unevenness by centrifugal force, so that the amount of floating water on which the surface tension of the object to be dehydrated does not act can be increased. By preventing the parts from being adjacent to each other, it is possible to prevent the parts where water is difficult to drain out from concentrating, and as a result,
The dewatering rate of the object to be dehydrated can be improved.

According to a second aspect of the present invention, in the first aspect of the present invention, the convex portion is constituted by an aggregate of flat surfaces having at least one side in contact with the side wall, and the water moves by centrifugal force. The generation of difficult parts can be minimized, the amount of floating water on which the surface tension of the object does not act can be increased, and the dewatering rate of the object can be improved.

According to a third aspect of the present invention, in the first or the second aspect of the present invention, the convex portion has an approximately isosceles triangular cross section, and water contained in the object to be dehydrated is convex. It can be easily moved along the slope of the part, and the dewatering rate of the object to be dewatered can be improved.

[0015] The invention described in claim 4 is the above-mentioned claim 1-
In the invention described in Item 3, a first rotation speed at which the object to be dewatered in the dewatering tub is spread over the inner wall of the dewatering tub, a second rotation speed at which the water in the dewatering object is squeezed, and the second rotation speed The number of rotations is set in a stepwise manner including three stages of a third rotation number higher than the number of rotations, and the rotation number of the dehydration tank is gradually changed to efficiently perform dehydration and minimize wrinkles. Can be minimized.

According to a fifth aspect of the present invention, a rotatable dehydration tub is rotated at a high speed to dewater water in the object to be dehydrated by centrifugal force. Three stages of a first rotation speed for spreading the dewatering object on the inner wall of the dewatering tank, a second rotation speed for squeezing water in the dewatering object, and a third rotation speed higher than the second rotation speed The rotation speed is set so as to increase stepwise, and the rotation speed of the dehydration tub is gradually changed so that dehydration can be performed efficiently and wrinkles can be minimized.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) As shown in FIG.
1 is made of stainless steel or polypropylene resin,
A plurality of protruding portions 13 interrupted in the vertical direction are provided on the side wall 12 in a substantially parallel manner so that the cut portions 14 of the adjacent protruding portions 13 are not adjacent to each other.

The operation of the above configuration will be described. In the hydrophilic dewatering object 15, water moves when centrifugal force is applied because the surface tension acting on water is the same. At the stage of jumping out of the hydrophilic dewatering object 15, floating water on which surface tension does not act is centrifugally applied to the hydrophilic dewatering object 15.
Surface water in a region where the surface tension of the hydrophilic dewatering object 15 acts, the centrifugal force and the surface tension cause tension, and the surface water hardly jumps out. When water is balanced, water does not flow out of the object 15 to be dehydrated.

When the object to be dehydrated is put into the dewatering tank 11 and rotated at high speed, the object to be dewatered 15 is moved to the dewatering tank 1 as shown in FIG.
1 is provided on the side wall 12 formed on substantially the same circumference.
3, unevenness is formed along the side wall 12 of the dewatering tank 11, and water contained in the object 15 is centrifugally applied to the uneven bottom 1.
By concentrating on 6, the amount of floating water on which the surface tension of the object 15 does not act can be increased. Further, FIG.
As shown in (2), by preventing the cut portions 14 of the adjacent convex portions 13 from being adjacent to each other, it is possible to prevent a portion where water hardly comes out from being concentrated. As a result, the dehydration rate can be improved.

(Embodiment 2) As shown in FIG.
Is composed of an aggregate of planes 18 at least one side of which contacts the side wall. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described. When the object to be dehydrated is placed in the dewatering tank 11 and rotated at high speed, the object to be dehydrated 15 is formed on substantially the same circumference as the dewatering tank 11 as described above. The protrusion 13 provided on the side wall 12 allows the dehydration tub 1
Irregularities are formed along the side wall 12 of one, and the water contained in the object to be dehydrated 15 is concentrated on the bottom 16 of the irregularities by centrifugal force.

Here, as shown in FIG. 4, when the shape of the convex portion 19 is trapezoidal, the centrifugal force acting on the innermost peripheral surface is almost the same, so that a portion 20 where water does not easily move is formed. In addition, as shown in FIG. 5, when the convex portion has a semi-cylindrical shape, a portion 21 where water does not easily move is formed in a portion where the tangent is substantially parallel to the side wall 12 of the dewatering tank 11.

In the present embodiment, by forming the convex portion 17 as an aggregate of flat surfaces 18 having at least one side in contact with the side wall, it is possible to minimize the generation of a portion where water is difficult to move due to centrifugal force, and The amount of floating water on which the surface tension of the object 15 does not act can be increased, and as a result, the dewatering rate can be improved.

(Embodiment 3) As shown in FIG.
Has a cross-sectional shape of an approximately isosceles triangle and a height B of 3 mm or more per 20 mm of the base A. Other configurations are the same as those of the second embodiment.

As described above, as for the water contained in the object 15, the floating water moves by centrifugal force, but the water near the surface of the object 15 needs to move by centrifugal force against the surface tension. Therefore, it is necessary to give a stronger centrifugal force. Since the centrifugal force acts on the water as a water pressure, the water contained in the object to be dehydrated 15 moves more easily along a slope where a water pressure difference is likely to occur.

If the object to be dehydrated 15 is put in the dewatering tub 11 and the rotation is not well balanced, the inner wall 12 of the dewatering tub 11 may rotate with inclination as shown in FIG. Therefore, it is necessary to consider the reduction of the centrifugal force due to this.

From such a viewpoint, the dewatering rate can be improved by forming the cross-sectional shape of the convex portion 22 into a substantially triangular shape having a height B of 3 mm or more per base A of 20 mm.

(Embodiment 4) As shown in FIG. 8, when the spin-drying tub is rotated at a high speed for spin-drying, the object to be dehydrated in the spin-drying tub is spread over the inner wall of the spin-drying tub.
0 to 200 r / min) for a first predetermined time t1 (for example, 15
) For 30 seconds, and then at a second rotation speed N2 (for example, 250-350 r / min) to squeeze water in the material to be dehydrated.
Is maintained for a predetermined period of time t2 (for example, 15 to 30 seconds), a third rotation speed N3 (for example, 450 to 650 r / min) higher than the second rotation speed N2, and a time period of the third rotation speed N3 is set to the third rotation speed N3. The predetermined time t3 (for example, 3 minutes) or less is set to 3 or less so as to squeeze the water. Other configurations are the same as those of the above-described first to third embodiments.
Same as 3.

The operation of the above configuration will be described. In the dehydration of the clothes during washing, when the rotation speed is gradually increased, the clothes spread on the side wall of the dewatering tub 11 near the rotation speed of 150 r / min, and the donut is substantially donut-shaped. And rotation speed 200r /
Water starts to splash from the cloth near min. When the rotation speed is further increased, the clothes are pressed against the side wall of the dewatering tub 11 at about 500 r / min.

On the other hand, the relationship between the time of dehydration and the depth of wrinkles remaining on clothing is as shown in FIG. From this, it can be seen that wrinkles are likely to be formed when the time exceeds 3 minutes.

From these facts, the first rotation speed N1 for pushing the dewatered material in the dewatering tub over the inner wall of the dewatering tub, the second rotation speed N2 for squeezing the water in the dewatering ware, Is set so as to increase the rotation speed in a stepwise manner including three stages of a third rotation speed N3 higher than the rotation speed N2 of the third rotation speed N3.
By squeezing the water at a setting of less than a minute, it is possible to increase the dewatering efficiency and make the clothes hard to wrinkle.

It should be noted that, in addition to the three rotational speed stages,
Even if the dehydration is intermittently controlled to control the amount of drainage or maintained at a constant rotation speed other than these three stages,
If the step is included, the clothes can be made hard to wrinkle while increasing the dewatering efficiency.

In this embodiment, a plurality of convex portions 13 intermittent in the vertical direction are provided on the side wall 12 in a substantially parallel manner so that the cut portions 14 of the adjacent convex portions 13 are not adjacent to each other. Although the control of the rotation speed of the dehydrator using 11 has been described, the rotation speed can be similarly controlled for a dehydrator using centrifugal force due to high-speed rotation, without being limited thereto.
Similar functions and effects can be obtained.

[0035]

As described above, according to the first aspect of the present invention, the rotatable dewatering tank is rotated at a high speed, and the water in the material to be dewatered is dewatered by centrifugal force. Then, the dewatering tank is provided with convex portions intermittent in the vertical direction on the side wall so that the cut portions of adjacent convex portions are not adjacent to each other, so that the amount of floating water on which the surface tension of the object to be dehydrated does not act is increased. In addition, it is possible to prevent a portion from which water hardly drains from concentrating, and as a result, it is possible to improve a dewatering rate of the object to be dewatered.

According to the second aspect of the present invention, since the convex portion is constituted by an aggregate of flat surfaces at least one side of which is in contact with the side wall, the generation of a portion where water is difficult to move due to centrifugal force is minimized. The amount of floating water on which the surface tension of the object to be dehydrated does not act can be increased, and the dewatering rate of the object to be dehydrated can be improved.

According to the third aspect of the present invention, since the cross-sectional shape of the convex portion is substantially an isosceles triangle, water contained in the object to be dehydrated easily moves along the slope of the convex portion. It is possible to improve the dewatering rate of the object to be dewatered.

According to the fourth aspect of the present invention, the first rotation speed at which the object to be dehydrated in the dewatering tub is spread over the inner wall of the dewatering tub, and the second rotational speed at which the water in the object to be dewatered is squeezed. Since the rotation speed is set to be increased stepwise including three stages of a rotation speed and a third rotation speed higher than the second rotation speed, the rotation speed of the dehydration tub is gradually changed so that dehydration is efficiently performed. And
Wrinkles can be minimized.

According to the fifth aspect of the present invention, the rotatable dewatering tub is rotated at a high speed, and the water in the material to be dewatered is dewatered by centrifugal force. A first rotation speed at which the object to be dehydrated in the dewatering tub is spread over the inner wall of the dewatering tub, a second rotation speed at which the water in the dewatering object is squeezed, and a third rotation speed higher than the second rotation speed Since the rotation speed was set to increase in a stepwise manner including three stages of the number, the rotation speed of the dehydration tank was gradually changed, and the dehydration was efficiently performed.
Wrinkles can be minimized.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a dehydration tank of a dehydrator according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a dehydration tank of the dehydrator.

FIG. 3 is a front view of a convex portion of a dehydration tub of a dehydrator according to a second embodiment of the present invention.

FIG. 4 is a front view of an example of a convex portion which is compared with a convex portion of a dehydration tank of the dehydrator.

FIG. 5 is a front view of another example of the convex portion which is compared with the convex portion of the dewatering tub of the dehydrator.

FIG. 6 is a sectional view of a convex portion of a dewatering tank of a dehydrator according to a third embodiment of the present invention.

FIG. 7 is a schematic view of a dewatering tank rotated in an unbalanced state of the dewatering machine.

FIG. 8 is a time chart of a change in the spinning speed of the spinning machine according to the fourth embodiment of the present invention.

FIG. 9 is a characteristic diagram showing a dewatering rate and a wrinkle depth of the dewatering machine.

FIG. 10 is a sectional view of a washing machine having a conventional dehydrator.

[Description of Signs] 11 Dehydration tank 12 Side wall 13 Convex part 14 Cut part

Claims (5)

[Claims] 1. A dewatering tank that is rotatably arranged is rotated at a high speed to dewater water in an object to be dewatered by centrifugal force. The dewatering tank has a convex portion interrupted in a vertical direction on a side wall. A dehydrator in which adjacent protruding sections are not adjacent to each other. 2. The dehydrator according to claim 1, wherein the convex portion is formed of an aggregate of flat surfaces at least one side of which is in contact with the side wall. 3. The dehydrator according to claim 1, wherein the convex portion has a substantially isosceles triangular cross section. 4. A method according to claim 1, further comprising: a first rotation speed for spreading the object to be dehydrated in the dewatering tub on the inner wall of the dehydration tub; a second rotation speed for squeezing the water in the dewatering object; The dehydrator according to any one of claims 1 to 3, wherein the rotation speed is set to be increased stepwise including three stages of a high third rotation speed. 5. A dewatering tub disposed rotatably is rotated at a high speed to dewater water in the dewatering object by centrifugal force, and said dehydration tub is configured to dewater the dewatering object in the dewatering tub. A step-like rotation speed including three stages of a first rotation speed for spreading the inner wall, a second rotation speed for squeezing water in the dewatering object, and a third rotation speed higher than the second rotation speed. Dehydrator set to raise.