JP3178967B2 - Dehydration combined washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine which performs washing by forward and reverse rotation of a stirrer disposed at the inner bottom of a tub, and performs dehydration by rotating the tub.

[0002]

2. Description of the Related Art Conventionally, in this kind of washing machine for combined use of dehydration, a tub is provided for both washing and dehydration, and washing is performed by forward and reverse rotation of a stirring member disposed at the inner bottom of the tub. Dehydration is performed by the rotation of.

FIGS. 5A to 5E show stirring bodies 1 to 5 of this type of conventional dehydrating and washing machine, respectively. The blades 1b to 5b are radially arranged on circular bases 1a to 5a, respectively. Wings 1b, 2b, 4
While the blades b and 5b are linear, the blade 3b is curved. However, in each of these cases, each of the stirrers 1 to 5 has the normal direction (clockwise and counterclockwise).
The blades 1b to 5b are symmetrically and equally present in both directions of rotation. Protrusions 6 to 10 are also provided radially around members around the stirring bodies 1 to 5, for example, around the stirring bodies 1 to 5 in the tank.

[0004]

However, in the conventional dewatering / washing machine using the stirring bodies 1 to 5 as described above, especially in the recent dehydration / washing machine in which the capacity of the laundry is increased, the I can't get enough power. or,
In addition, the laundry tends to be entangled and formed into a dumpling shape, which makes it difficult to take out the laundry. At the time of dehydration, the load becomes an unbalanced load for the rotation of the tub, thereby causing a lot of abnormal vibration.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is therefore an object of the present invention to provide sufficient detergency, facilitate the removal of laundry, and prevent abnormal vibration during dehydration. An object of the present invention is to provide a washing machine that can be reduced in weight and used for both dehydration and washing.

[0006]

In order to achieve the above-mentioned object, in the washing machine with dehydration according to the present invention, washing is performed by forward / reverse rotation of a stirrer provided at the inner bottom of the tub, and the washing is performed by rotation of the tub. In the dewatering device, the agitator is provided with a circular base, and a radially protruding center is provided on the base, and a protruding body is provided on the outer peripheral side so as to be inclined in either forward or reverse rotation direction. Characterized in that it is formed in a form having a wing.

In this case, it is preferable that the length of the radially straight portion of the blade of the stirring body and the length projected on the radius of the inclined portion be substantially equal. Further, the inclined portion of the blade of the agitator may be formed in a curved shape, and the radius of curvature of the curve may be set to be substantially equal to the radius of the base.

Further, it is preferable that the upright angle of the blade from the base of the stirring body is set to be larger at the inclined outer surface than at the inner surface.
And it is good to form the same number of protrusions at the same pitch as the blades of the stirrer on the outer member around the stirrer, and make the inclination direction of the protrusions opposite to that of the inclined part of the blade of the stirrer. It is good to form.

[0009]

[Action] Washing of a washing machine is called an action of mechanical power and chemical power. If mechanical power acts strongly, chemical power is more likely to exert its effect, and the cleaning power increases. Conventionally, the mechanical power
It was thought that the friction between the stirrer and the laundry greatly affected it.However, with the recent increase in the capacity of the laundry and the combined use of a dehydrating and washing machine, the entire laundry did not directly touch the agitator and the frictional force was reduced. Less effective.

It is considered that the action of the blade of the stirring body is composed of two actions. One is the action of moving water by the pumping action of the rotation of the blades, dissolving the detergent with the water flow, deforming the laundry, and washing it. This is the action of causing the laundry to deform and wash.

[0011] In this regard, when the effect of the agitator of the conventional dehydrating and washing machine on the water in the tub and the laundry was investigated, the following was found. That is, in a washing machine for both dehydration and washing, as is well known, the tub has a cylindrical shape for performing dehydration by rotation, and the agitator is arranged concentrically at the center of the inner bottom. With this configuration, in the conventional agitator in which the blades are symmetrically and equally present in both the forward and reverse directions as described above, the short-cycle forward / reverse rotation (for example, when the drive motor
During 2 seconds, the power is cut off for 0.5 to 1 second, and the same pattern is repeated in the opposite direction.) In the meantime, the laundry only moves approximately the same amount in both the forward and reverse directions. The relative position hardly changes. For this reason, the reversal of the laundry and the like are reduced, and an increase in the detergency cannot be expected.

Further, if the rotational driving time of the stirring body is increased in order to increase the washing power, the laundry is swirled by the mechanical action of the blades. When this happens, the specific gravity of the laundry with respect to water is large,
The laundry comes to the center. As a result, the laundry is entangled and solidified in a dumpling shape, and the laundry is little deformed in spite of rotating, and the detergency is not increased. Not only that, but the laundry outside the lump is significantly damaged.
Further, the hardened laundry becomes an unbalanced load for rotating the tub toward one side of the tub at the time of dehydration, and generates abnormally large vibration and noise. In this case, a large vibration also shortens the life of the product itself.

On the other hand, as described above, the stirrer is
The present invention is formed into a form having a circular base and a blade protruding radially linearly on the center side on the base side and protruding on the outer peripheral side so as to be inclined in either forward or reverse rotation direction. Since the blades are asymmetrical in both forward and reverse rotations of the stirrer, the mechanical force and the water flow force exerted by the blades are different between the forward and reverse rotations of the stirrer, and thus the movement of the laundry and the water is reduced. It is complicated and prosperous, and the washing power can be improved, the laundry can be easily taken out, and the occurrence of abnormal vibration during dehydration can be reduced.

In this case, in particular, when the length of the radially straight portion of the blade of the agitator is substantially equal to the length projected on the radius of the inclined portion, the mechanical and hydraulic forces exerted by the blade are reduced. The best balance can be achieved in the relationship.

Further, when the inclined portion of the blade of the stirring body is formed in a curved shape, the movement of the laundry and the water can be made smoother. Also in this case, when the radius of curvature of the curvature is set to be substantially equal to the radius of the base, the effect of smoothing the movement of the laundry and the water can be obtained high.

In the case where the rising angle of the blade from the base of the stirrer is set to be larger at the outer side surface than at the inner side surface, the blades rotate when rotating in the outward direction and when rotating inward. The balance between the exerted mechanical force and the water flow force can be improved.

On the other hand, in the case where the same number of protrusions are formed at the same pitch as the blades of the stirrer, on the outer member around the stirrer,
The upward movement of the laundry and the movement of the laundry can be more effectively performed by the convex portions. Further, also in this case, if the convex portion is formed with the inclination direction of the blade being opposite to the inclination direction of the inclined portion of the blade of the stirring body, the effect of changing the movement of the laundry and the water flow upward can be enhanced.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. First, FIG. 3 shows an outer box 11 of the entire dehydrating / washing machine, in which an outer tub 12 is provided.
Are supported by an elastic support mechanism 13 (only part of which is shown), and an inner tank 14 is provided inside the outer tank 12. Further, inside the inner tank 14, an inner cover 15 made of metal such as stainless steel covering almost the entire inner peripheral surface thereof, and a bottom cover 1 covering the bottom portion are provided.
Further, a balance ring 17 is attached to the upper edge of the inner tank 14, and a stirrer 18 is concentrically arranged at the inner bottom.

At the lower part outside the outer tub 12, a drain valve 19 is provided, and a drive mechanism 21 mainly including a motor 20 is provided. Then, the stirring unit 18 is rotated forward and reverse in both clockwise and counterclockwise directions.
8 and is rotated at high speed in one direction. Therefore, the inner tub 14 is also used for washing and dehydration, and
The water of the laundry (not shown) is shaken off from the water holes 22 of the inner cover 15 by the centrifugal force generated by the high-speed rotation described above, and is pumped through the gap between the inner cover 15 and the inner peripheral surface of the inner tub 14. The water is discharged from the dewatering hole 23 at the upper end of the inner tank 14.

On the other hand, the stirrer 18 is, for example, entirely molded from, for example, plastic, and is shown in FIG.
As shown in FIG.
(See FIG. 2), a circular base 25 having a central portion attached thereto, and, for example, six blades 26 protruding from the base 25. More specifically, the blade 26 is mounted on the base 2
5 is protruded radially at the center side and a stirring body 18 is provided at the outer peripheral side.
The direction of rotation of either forward or reverse (in this case, clockwise)
It protrudes so as to be inclined.

The length L1 of the radial linear portion 26a of the blade 26 of the stirring body 18 and the length L2 projected on the radius of the inclined portion 26b are substantially equal (about 1: 1). Further, the inclined portion 26b is formed in a curved shape,
Specifically, the diameter D of the base 25 is set to 343 [mm],
By setting the radius of curvature r of the curvature of the inclined portion 26b to 150 [mm], the radius of curvature r of the curvature of the inclined portion 26b is determined to be substantially equal to the radius (D / 2) of the base 25. In addition, the inclined portion 2 from the extension of the radial linear portion 26a
The displacement dimension s of the tip of 6b is 25 [mm].

In addition, as shown in FIG. 2, when the angle of the blade 26 from the base 25 is α on the outer side of the slope and β on the inner side of the slope, α> β, that is, The upright angle α of the outer side surface is set to be larger than the upright angle β of the inner side surface. In addition, the bottom cover 16, which is a member on the outer side of the agitator 18, has a radially convex portion 2.
7 are formed in the same number as the blades 26 at the same pitch.

Next, the operation of the above configuration will be described. First, the mechanical force will be described. At the time of washing, when the stirrer 18 is rotated as described above, water (not shown) in the inner tub 14 is sucked by centrifugal force by the action of the blade 26 and discharged to the outside. Therefore, the laundry is attracted to the blade 26 surface of the stirring body 18. At this time, in the counterclockwise rotation of the stirrer 18, since the blades 26 are inclined clockwise, an action of pushing out the laundry occurs, and the laundry is likely to be clumped. But with this power, the laundry is loosened,
Makes a general attempt to spread.

Next, when rotated clockwise, the laundry is attracted to the agitator 18 by the action of the water flow, and a movement to approach the center occurs. These two movements cause the laundry to move in the radial direction, thereby suppressing the action of the laundry to form a lump, thereby increasing the cleaning power. Further, since the movement of the laundry is clearly changed between the clockwise rotation and the counterclockwise rotation,
Also in the inner tub 14 of the dehydrating / washing machine having the concentric shape, the laundry is given a variable movement, and the upside down is promoted.

Next, the operation of the water flow will be described. When the stirrer 18 rotates, the centrifugal force causes the water to be sucked in from the inside and a pumping action to go out to the outside works. This pumping action has an action of dissolving the detergent other than the movement of the laundry, and is an important factor. In the stirrer 18 having the above-described configuration, the blades 26 are radially projected on the center side of the base 25, and thus, at this portion, basically required water flow force is generated for rotation in both the left and right directions.

Then, in the counterclockwise rotation, the water flow pushed outward is strongly emitted. As described above, if only the rotating force is applied to the laundry, the laundry is entangled instead of turning around, but at the time of this counterclockwise rotation, the movement of water is added to the rotating direction, When the force in the radial direction acts strongly, a component that causes water to rise upward on the side wall of the dewatering tub comes out. This enhances the effect of preventing the laundry from clumping. Next, in the case of clockwise rotation, an action of reversely pushing water in the rotating direction appears, and the movement of the laundry itself is increased by the water flow force.

As described above, according to the present structure, the stirrer 18
By making the mechanical force and the water flow force exerted by the blade 26 different between the forward rotation and the reverse rotation of the agitator 18, the movement of the laundry and the water is complicated and prosperous, and the deformation, compression, stretching, etc. of the laundry are repeated. And the detergency can be improved.

Table 1 below shows the test results of the washing machine equipped with the stirring body 18 of the present invention and the washing machine equipped with the conventional stirring body equipped with the stirring body.

[0029]

[Table 1]

As is evident from Table 1, the present invention can be used for both the high washing ratio, the small washing unevenness, the short take-out time of the cloth (laundry), and the small vibration amplitude. The washing machine has more favorable results than the conventional washing machine combined with dehydration.

In addition, in particular, in the case of the above-mentioned structure, the length L1 of the radial linear portion 26a of the blade 26 of the agitator 18 is substantially equal to the length L2 projected on the radius of the inclined portion 26b. Thereby, the balance can be made best in relation to the mechanical force and the water flow force exerted by the blade 26.

The inclined portion 26 of the blade 26 of the stirring body 18
By forming b in a curved shape, the movement of laundry and water can be made smoother. Also in this case, by setting the radius of curvature r of the curvature to be substantially equal to the radius (D / 2) of the base 25, the effect of smoothing the movement of the laundry and water can be obtained.

Further, the stirring member 18 is provided on the inclined portion 2 of the blade 26.
When rotating in the inward direction (clockwise) and in the outward direction (counterclockwise) of the inclination of 6b, there is a dislike that the former exerts too much force than the latter. The standing force of the blade 26 is set to be larger than the inner surface (α> β) at the outer surface of the slope, so that the mechanical force exerted by the blade 26 when rotating in the inward direction and when rotating in the outer direction of the slope, respectively. In addition, it is possible to improve the balance between the hydraulic power and the water flow, which is more effective in reducing the occurrence of imbalance and uneven washing of the laundry.

On the other hand, the convex portion 27 is formed on the bottom cover 16 which is a member on the outer side of the stirring body 18,
The effect of the inclined portion 26b of the blade 26 of the agitator 18 is increased, and the effect of improving the washing power and the washing power can be further improved. That is, first, regarding the hydraulic force, the convex portion 27 functions as a kind of stationary blade in the pump, and the radial water flow generated when the agitator 18 rotates counterclockwise along the inner surface of the inner tank 14. It is possible to strongly exert the effect of changing the upward water flow to rise, and thereby has an effect of suppressing the laundry from becoming a dumpling.
On the other hand, as for the mechanical action, the movement of the laundry pushed out during the counterclockwise rotation of the stirrer 18 can be changed in the vertical direction by the convex portion 27, so that the laundry can be turned upside down smoothly. .

In this case, in particular, since the same number of the convex portions 27 are formed at the same pitch as the blades 26 of the stirring body 18, the convex portions 27 are formed.
Can be made to correspond one-to-one with the blades 26 of the stirrer 18, so that the movement of the laundry and the water flow can be more effectively changed as described above.

FIG. 4 shows a second embodiment of the present invention, in which the convex portion 28 is replaced with the above-mentioned convex portion 27, and the direction of the inclination is the inclined portion 26b of the blade 26 of the agitator 18. Is formed in a direction opposite to the inclination direction, and the effect of changing the movement of the laundry and the water flow in the upward direction can be further enhanced. In addition, the outer member around the agitator 18 may be constituted by, for example, the bottom of the inner tank 14 other than the bottom cover 16. In such a case, the projections 27 and 28 are provided on the bottom of the inner tank 14. It is good to form.

[0037]

The dehydrating and washing machine of the present invention is as described above, and has the following effects. First, washing is performed by forward and reverse rotation of a stirrer disposed at the inner bottom of the tub, and dehydration is performed by rotation of the tub. By forming the blades in a form having radially protruding blades protruding so as to be inclined in either forward or reverse rotation direction on the outer peripheral side, the movement of laundry and water can be complicated and prosperous. As a result, sufficient washing power can be obtained, the laundry can be easily taken out, and the occurrence of abnormal vibration during dehydration can be reduced.

Secondly, the relationship between the mechanical force and the hydraulic force exerted by the blade is obtained by forming the length of the radial linear portion of the blade of the stirring body and the length projected on the radius of the inclined portion to be substantially equal. Can achieve the best balance. Third, since the inclined portions of the blades of the stirring body are formed in a curved shape, the movement of the laundry and the water can be made smoother.

Fourth, by setting the radius of curvature of the curved portion of the inclined portion of the blade of the stirring body to be substantially equal to the radius of the base, it is possible to obtain a high effect of smoothing the movement of the laundry and water. it can. Fifth, by setting the rising angle of the blade from the base of the stirring body to be larger at the outer side surface portion than at the inner side surface portion, it is possible to rotate the blade in the outward direction and when rotating in the inward direction. The balance between the mechanical force and the water force exerted by the blade can be improved.

Sixth, by forming the same number of protrusions at the same pitch as the blades of the stirrer on the outer member around the stirrer, the movement of the laundry and the water flow can be changed upward by the protrusions. Can be performed more effectively. Seventh
In addition, since the inclination direction of the convex portion is formed to be opposite to the inclination direction of the inclined portion of the blade of the agitator, the effect of changing the movement of the laundry and the water flow upward can be enhanced.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part showing a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a part taken along the line AA of FIG. 1;

FIG. 3 is an overall cutaway side view.

FIG. 4 is a view corresponding to FIG. 1 showing a second embodiment of the present invention.

5 (a) to 5 (e) show five conventional examples, each corresponding to FIG.

[Explanation of symbols]

14 is an inner tank (tank), 16 is a bottom cover (outer periphery of the stirrer), 18 is a stirrer, 21 is a drive mechanism, 25 is a base, 26 is a blade, 26a is a radial linear portion, 26b is The inclined portions 27 and 28 indicate convex portions.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-17394 (JP, A) JP-A-60-142895 (JP, A) JP-A-5-21878 (JP, U) 2532 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06F 17/10 D06F 23/04

Claims (7)

(57) [Claims] 1. A washing machine in which washing is performed by forward and reverse rotation of a stirrer disposed at the inner bottom of a tub and dehydration is performed by rotation of the tub. And a blade protruding radially in a straight line at the outer periphery and protruding so as to incline in either the forward or reverse rotation direction on the outer peripheral side. 2. The washing machine according to claim 1, wherein the length of the radially straight portion of the blade of the stirrer and the length projected on the radius of the inclined portion are substantially equal. 3. The washing machine according to claim 1, wherein the inclined portion of the blade of the stirring body is formed in a curved shape. 4. The washing machine according to claim 3, wherein the radius of curvature of the curved portion of the blade of the stirrer is set to be substantially equal to the radius of the base. 5. The upright angle of the blade from the base of the stirring body,
2. The washing machine according to claim 1, wherein the inclined outer surface is larger than the inner surface. 6. The washing machine according to claim 1, wherein the same number of protrusions are formed at the same pitch as the blades of the stirrer, on the outer member around the stirrer. 7. The dehydrating and washing machine according to claim 1, wherein a convex portion whose inclination direction is opposite to the inclination direction of the inclined portion of the blade of the stirrer is formed on a member outside around the stirrer.