JP3315279B2 - 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. However, the stirrer of this type generally has a plurality of blades protruding radially on the upper surface of a flat circular base, and particularly the blades are symmetrically equal in both forward and reverse rotation of the stirrer. Existing.

[0003]

However, in the conventional dehydrating and washing machine using the above-described stirring body, sufficient washing power can be obtained, especially in the case of a recent washing machine in which the capacity of the laundry is increased. Can not. In addition, the laundry is likely to be entangled by the laundry and forms one large lump, which is difficult to remove. Further, the solidified laundry becomes an unbalance load for rotation of the tub during dehydration, and tends to generate abnormally large vibration in the tub.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and accordingly, it is an object of the present invention to obtain sufficient washing power even for a large amount of laundry, and to easily remove the laundry. An object of the present invention is to provide a washing machine which can also be used for both dehydration and which can reduce occurrence of abnormal vibration during dehydration.

[0005]

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 dehydrating apparatus, the stirring body is a flat circular shallow pot-like base, and is radially linearly protruded at the center on the base and inclined in one of the forward and reverse rotation directions on the outer peripheral side. And a blade provided to protrude from the main body.

In this case, it is preferable that the height of the blades of the agitator is set to be equal to or less than the height of the outer peripheral edge of the base, and that the height of the blades is set so that the central portion is smaller than the outer peripheral portion. It is preferable that the height of the mounting boss located in the center of the base of the stirring body is set lower than the outer peripheral edge of the base.

On the other hand, the deviation of the inclined portion from the straight portion of the blade of the stirring body at the outer peripheral edge of the base may be set to approximately 1/20 to 6/20 of the diameter of the base. The portion may be formed in a ring shape having a step with the outer peripheral end of the blade and located above the step.

[0008] A plurality of inclined ribs may be formed in the space between the blades on the base of the stirring body, and the inclination angle of the inclined rib may be made different depending on the position of the space between the blades on the base of the stirring body.

[0009]

When the cause of the inability to obtain sufficient detergency by the conventional dehydrating and washing machine was investigated, the following was found. That is, in a washing machine for both dehydration and washing, as is well known, the tub is cylindrical in order to perform dehydration by rotation, and the agitator is concentrically arranged on the inner bottom portion of the tub to rotate with it during dehydration. .

[0010] In this situation, according to the conventional agitator in which the blades are symmetrically and equally present in both the forward and reverse rotations during the washing, the movement exerted on the washing water and the laundry by the forward and reverse rotations is almost the same.ゞ They are the same and give the same power. Therefore, the laundry moves almost in the same direction for both the forward and reverse rotations of the stirrer, and moves almost the same amount, and there is almost no change in the relative position. For this reason, there is little change of the laundry in the tub and the likelihood of the laundry becoming entangled with each other becomes large. Particularly, when the amount of the laundry is large, the tendency is remarkable.

On the other hand, according to the stirrer of the present invention, the blade is protruded radially linearly at the center side on the base and is protruded at the outer peripheral side so as to be inclined in one of the forward and reverse rotation directions. The movement given to the washing water and the laundry is different for both forward and reverse rotation.Specifically, when the stirring body rotates in the inclination direction of the outer periphery of the blade, the washing water is scraped in and drawn in. Therefore, the laundry is drawn inward. On the other hand, when the agitator rotates in the direction opposite to the direction of inclination of the outer peripheral portion of the blade, the washing water is pushed outward, and thus the laundry is also pushed outward.

Further, according to the agitator of the present invention, the force exerted on the washing water and the laundry by the agitator is also different for both forward and reverse rotations. Specifically, the agitator rotates in the direction of inclination of the outer periphery of the blade. When doing so, the washing water is strongly rotated to generate a strong water flow, and thus the laundry is strongly rotated. on the other hand,
When the stirrer rotates in the direction opposite to the direction of inclination of the outer periphery of the blade, the washing water is rotated weaker than described above to generate a weaker flow of water, and thus the laundry is rotated more weakly than described above.

Further, in the stirring body of the present invention, the base is formed in a shallow bowl shape. According to this configuration, when the laundry is drawn inward, it becomes easier to move toward the center of the stirring body, and when it is pushed out, it becomes easier to move upward, and the movement in the radial direction increases.

Thus, the washing water and the laundry are moved more complicatedly and more vigorously than conventional ones. As a result, the repetition of the deformation, compression, stretching and the like of the laundry can be increased and increased, and the washing power is improved. And entanglement of laundry can be reduced.

In particular, when the height of the blades of the stirrer is set to be equal to or less than the height of the outer peripheral edge of the base, the laundry can be more easily moved toward the center of the stirrer, and the movement in the same direction can be performed. It can be even larger. Even if the height of the blades is set so that the central part side is smaller than the outer peripheral part side, similarly, the laundry can be more easily advanced toward the center of the stirring body, and the movement in the same direction can be further increased. it can.

Further, even if the height of the mounting boss located at the center of the base of the stirrer is set lower than the outer peripheral edge of the base, the laundry can be more easily advanced toward the center of the stirrer. As a result, the movement in the same direction can be further increased. Moreover, in this case, the laundry that has proceeded toward the center of the agitator rubs against each other at the center of the laundry, whereby the washing power can be further improved.

On the other hand, in the case where the deviation of the inclined portion from the linear portion of the blade of the agitator with respect to the outer peripheral edge of the base is set to be about 1/20 to 6/20 of the diameter of the base, the detergency is data-wise. Further, better results can be obtained in terms of ease of taking out the laundry and the ease of removing abnormal laundry during dehydration.

Also, in the case where the outer peripheral edge of the base of the stirring body is formed in a ring shape having a step between the outer peripheral end of the blade and the upper end thereof, the rising portion of the step forms It is easier to move the laundry upwards,
Depending on the ring-shaped configuration of the outer peripheral edge of the base, the strength of the stirring body can be increased.

In the case where a plurality of inclined ribs are formed in the portion between the blades on the base of the agitator, the laundry can be rubbed with the ribs to further improve the detergency. In addition, when the inclination angle of the inclined rib is changed depending on the position of the portion between the blades on the base of the stirrer, the degree of rubbing of the laundry can be complicated, and a further improvement in the detergency can be seen. it can.

[0020]

An embodiment of the present invention will be described below with reference to the drawings. First, FIG. 2 shows an outer box 1 of the entire washing machine with dehydration, in which an outer tub 2 is provided.
An inner tank 3 is provided therein. A balance ring 4 is attached to the upper edge of the inner tank 3, and a stirrer 5 is concentrically arranged at the inner bottom in FIG.

A drain valve 6 is provided below the outer tub 2 and a drive mechanism 8 mainly including a motor 7 is provided. The drive mechanism 8 allows the inner tub to be washed during washing. 3, the stirrer 5 is rotated forward and backward in both clockwise and counterclockwise directions, and the inner tub 3 is rotated in one direction together with the stirrer 5 during dehydration. Accordingly, the inner tub 3 is used for both washing and dewatering. In particular, the dehydration is performed by the centrifugal force generated by the high-speed rotation described above, and the water contained in the laundry is drained by the dehydration holes 9 in the peripheral wall of the inner tub 3.
It is performed by shaking off from

On the other hand, the stirrer 5 is, for example, entirely formed by molding a plastic, for example, and as shown in FIG. For example, the blades 11 are provided in a radially linear manner at the center of the base 10, and either one of the forward and the reverse of the stirring body 5 is provided at the outer peripheral side. The projection is provided so as to be inclined in one rotation direction (in this case, a clockwise direction indicated by an arrow A), in particular, to be inclined in a curved shape.

The heights of the blades 11 are all set to be equal to or less than the height of the outer peripheral edge portion 10a of the base 10, and are also set so that the central portion is smaller than the outer peripheral portion. Further, a mounting boss 12 is formed at the center of the base 10, and the boss 12 is fitted on the washing output shaft 13 of the driving mechanism 8 and is mounted with a screw 14 (FIG. 2). However, the height of the boss portion 12 is the same as the outer peripheral portion 10 of the base 10.
It is set lower than a.

The deviation d of the inclined portion with respect to the straight portion of the blade 11 at the outer peripheral edge portion 10a of the base is set to be about 1/20 to 6/20 of the diameter D of the base 10.
Further, the outer peripheral edge 10a of the base 10 has a step s between itself and the outer peripheral end of the blade 11, and is formed in a ring shape located above the step s. Further, a plurality of inclined ribs 15 are formed in the portion between the blades 11 on the base 10, and the inclination angle of the inclined ribs 15 varies depending on the position of the portion between the blades 11 on the base 10.

Next, the operation of the above configuration will be described. At the time of washing, the inner tub 3 is stopped by the drive mechanism 8 and the stirring body 5
Is rotated in both the clockwise and counterclockwise directions as described above. When the clockwise rotation is performed, the stirring body 5 tilts the outer peripheral portion of the blade 11 in the rotation direction. 4 and FIG.
As shown by, the washing water in the inner tub 3 is scraped by the outer peripheral portion and drawn inward, so that the laundry is also drawn inward.

On the other hand, when the agitator 5 is rotated in the counterclockwise direction, since the inclination of the outer peripheral portion of the blade 11 is opposite to the rotation direction, the agitator 5 is indicated by an arrow B 'in FIGS. As shown, the wash water is pushed outward, and thus also the laundry.

When rotated in the clockwise direction, the agitator 5 rotates the washing water in the inner tub 3 strongly by the outer peripheral portion of the blade 11 inclined in the rotating direction to generate a strong water flow. Rotate the laundry strongly.

On the other hand, when rotated in the counterclockwise direction, the stirrer 5 rotates the washing water in the inner tub 3 more weakly than the above, thereby generating a weaker water flow than the above, and therefore, the laundry is moved more than the above. Rotate slightly.

And, in addition to them, the stirring body 5 is
0 is a shallow bowl, so that when the laundry is pulled inward, it becomes easier to move toward the center of the stirring body 5, and when pushed out, it becomes easier to advance upward, and the movement in the radial direction becomes easier. growing.

Thus, in the case of this construction, the washing water and the laundry are moved more complicatedly and more vigorously than conventional ones, and as a result, the repetition of the deformation, compression, stretching and the like of the laundry can be increased greatly and vigorously. Since the washing power can be improved, sufficient washing power can be obtained even for a large amount of laundry. In addition, since the movement of the laundry can be actively performed and the loosening effect is increased, the entanglement of the laundry can be reduced, and the entanglement of the laundry can be reduced in this way, so that the laundry can be easily taken out. Further, it is possible to prevent the laundry from becoming an unbalanced load of the rotation of the tub during dehydration, thereby reducing the occurrence of abnormal vibration of the tub.

FIG. 7 shows the test results of a dehydrating / washing machine equipped with the stirring body 5 of the present invention and a conventional dehydrating / washing machine equipped with a conventional stirring body. As is clear from FIG.
Regardless of the high washing ratio, the small washing unevenness, the short cloth (laundry) take-out time, and the small vibration amplitude, the dehydrating / washing machine of the present invention is better than the conventional dehydrating / washing machine. With good results.

In addition, especially in the case of the above-mentioned structure, since the height of the blades 11 of the stirring body 5 is set to be equal to or less than the height of the outer peripheral edge 10a of the base 10, the laundry is moved toward the center of the stirring body 5. Further, it is easy to advance, and the movement in the same direction can be further increased, which is more effective in improving the cleaning power.

Further, since the height of the blades 11 is determined such that the center portion is smaller than the outer peripheral portion, the laundry can be further easily advanced toward the center of the stirring body 5 in the same manner as described above. Can be further increased, which is more effective in improving the detergency.

Further, since the height of the mounting boss portion 12 located at the center of the base 10 is set lower than the outer peripheral edge 10a of the base 10, the laundry is also stirred as described above.
Can be further easily moved to the center direction, and the movement in the same direction can be further increased, which is more effective in improving the cleaning power. Moreover, in this case, the laundry that has proceeded toward the center of the stirring body 5 rubs against each other at the center of the laundry, whereby the washing power can be further improved.

FIG. 8 shows the results of a test in which the deviation d of the inclined portion of the inclined portion with respect to the straight portion of the blade 11 at the outer peripheral edge portion 10a of the substrate is set variously with respect to the diameter D of the substrate 10. As is apparent from FIG.
The deviation d of the inclined portion with respect to the straight portion of the base 10 at the outer peripheral edge portion 10a of the base is approximately 1/20 of the diameter D of the base 10.
By setting to 6/20, better results can be obtained in terms of detergency, ease of taking out laundry, and less abnormal vibration during dehydration. Note that FIG.
Is the cleaning power (cleaning ratio) created based on the data in FIG.
Represents the characteristics of

On the other hand, since the outer peripheral edge 10a of the base 10 has a step s with the outer peripheral end of the blade 11 and is formed in a ring shape located above the step s, the rising of the step s The portion makes it easier to move the laundry upward, thus improving the detergency and increasing the loosening effect of the laundry. In addition, the ring-shaped configuration of the outer peripheral edge portion 10a of the base allows the stirring body 5 Strength can be increased.

Further, since a plurality of inclined ribs 15 are formed in the portion between the blades 11 on the base 10, the laundry can be rubbed with the ribs, and the washing power can be further improved.
In addition, since the inclination angle of the inclined rib 15 is made different depending on the position of the portion between the blades 11 on the base 10, the degree of rubbing of the laundry can be complicated, and the cleaning power can be further improved. it can.

[0038]

The dehydrating and washing machine of the present invention is as described above, and has the following effects. First, washing is performed by forward / reverse rotation of a stirrer disposed at the inner bottom of the tub, and dehydration is performed by rotation of the tub. The upper part is formed in a form having a radially protruding blade on the center side and a blade protruded on the outer peripheral side so as to be inclined in one of the forward and reverse rotation directions, so that a large amount of laundry is However, sufficient detergency can be obtained, laundry can be easily taken out, and occurrence of abnormal vibration during dehydration can be reduced.

Second, the detergency can be further improved by setting the height of the blades of the stirring body to be equal to or less than the height of the outer peripheral edge of the base. Third, the detergency can be further improved, as described above, by setting the height of the blades of the agitator so that the central portion is smaller than the outer peripheral portion. Fourth, the stirrer has a mounting boss at the center of the base, and the height of the boss is set lower than the outer peripheral edge of the base. Can be.

Fifth, the deviation of the inclined portion from the linear portion of the blade of the agitator at the outer peripheral edge of the base is set to be approximately 1/20 to 6/20 of the diameter of the base.
Even better results can be obtained in terms of detergency, ease of taking out laundry, and low abnormal vibration during dehydration.
Sixth, the outer peripheral edge of the base of the agitator is formed in a ring shape having a step between the outer peripheral end of the blade and the upper edge thereof, so that the cleaning power can be improved. In addition, the effect of loosening the laundry can be increased, and the strength of the stirring body can be increased.

Seventh, the formation of a plurality of inclined ribs between the blades on the base of the agitator allows a further improvement in detergency. Eighth, by making the inclination angle of the inclined rib different depending on the position of the portion between the blades on the base of the stirring body, it is possible to further improve the detergency.

[Brief description of the drawings]

FIG. 1 is a plan view of a stirrer showing one embodiment of the present invention (a).
And longitudinal section (b)

FIG. 2 is an overall cutaway side view.

FIG. 3 is a longitudinal sectional view of an inner tank and a stirring body.

FIG. 4 is a partially enlarged plan view of a stirrer for explaining operation.

FIG. 5 is a perspective view of an inner tank portion for explaining operation.

FIG. 6 is a perspective view of an inner tank portion for explaining different operations.

FIG. 7 is a test data diagram.

FIG. 8 shows different test data.

FIG. 9 is a characteristic diagram based on different test data.

[Explanation of symbols]

3 is an inner tank (tank), 5 is a stirring body, 10 is a base, 10a is an outer peripheral edge of the base, 11 is a blade, 12 is a boss, 15 is an inclined rib, D is a diameter of the base, and d is a straight line of the blade. The deviation dimension of the inclined portion with respect to the portion at the outer peripheral edge of the base, s indicates a step between the outer peripheral edge of the base and the outer peripheral end of the blade.

Continuation of front page (56) References JP-A-1-236090 (JP, A) JP-A-64-64689 (JP, A) JP-A-63-153092 (JP, A) JP-A-8-84886 (JP, A) , A) Japanese Utility Model Hei 5 21878 (JP, U) Japanese Utility Model Showa 59-148780 (JP, U) Japanese Patent Publication 30-2532 (JP, B1) Japanese Utility Model 2-23258 (JP, Y2) Japanese Utility Model 2-17580 (JP, Y2) JP 61-12957 (JP, Y1) Patent 3178967 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06F 17/10

Claims (8)

(57) [Claims] 1. A washing machine in which washing is performed by forward and reverse rotation of a stirrer disposed on the inner bottom of a tub and dehydration is performed by rotation of the tub. A blade having radially linear projections at the center on the base side and protruding at the outer circumference so as to be inclined in one of the forward and reverse rotation directions. Machine. 2. The washing machine according to claim 1, wherein the height of the blades of the stirring body is set to be equal to or less than the height of the outer peripheral edge of the base. 3. The stirrer according to claim 1, wherein the height of the blades is determined so that the height of the blade at the center is smaller than that at the outer circumference.
The combined dewatering and washing machine described. 4. The dewatering and mixing device according to claim 1, wherein the stirrer has a mounting boss at the center of the base, and the height of the boss is set lower than the outer peripheral edge of the base. Washing machine. 5. The method according to claim 1, wherein the deviation of the inclined portion from the straight portion of the blade of the stirring member at the outer peripheral edge of the base is set to approximately 1/20 to 6/20 of the diameter of the base. Dehydration combined washing machine. 6. The stirrer according to claim 1, wherein the outer peripheral edge of the base of the agitator is formed in a ring shape having a step between the outer peripheral end of the blade and the upper end thereof. Dehydration combined washing machine. 7. The washing machine according to claim 1, wherein a plurality of inclined ribs are formed in a portion between the blades on the base of the stirring body. 8. The dehydrating and washing machine according to claim 7, wherein the inclination angle of the inclined rib is varied depending on the position of the portion between the blades on the base of the stirring body.