JPH08164290A - Spin-drying washing machine - Google Patents

Abstract

PURPOSE: To provide sufficient washing capability even for a large laundry volume, make the laundry easy to take out, and reduce the generation of an abnormal vibration at a spinning process. CONSTITUTION: A spin-drying washing machine washes laundry via the normal and reverse rotations of a pulsator 5 laid on the inner bottom of a drum also serving as a spin basket. Also, the pulsator 5 is formed to have a flat circular and shallow pot type base plate 10 as well as vanes 11 projected in a radial linear from the center of the base plate 10 and kept slantwise along one of normal and reverse rotating directions on the peripheral section of the plate 10. According to this construction, the pulsator 5 gives a different motion and strength to wash water and laundry, depending on the normal and reverse rotations thereof. In particular, a laundry motion is kept large along the center and external outward directions of the pulsator 5, thereby making the laundry motion complicate and active.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine for combined use of dewatering, in which washing is carried out by rotating the agitator provided at the inner bottom portion of the tub for normal and reverse rotation, and dewatering is carried out by rotating the tub.

[0002]

2. Description of the Related Art Conventionally, in this type of combined dewatering washing machine, a tub is used for both washing and dewatering, and washing is performed by the forward and reverse rotation of an agitator disposed at the inner bottom of the tub. Dehydration is performed by rotating each. In general, the agitator of this type has a plurality of blades radially projecting from the upper surface of a flat circular base, and in particular, the blades are symmetrically equal in both forward and reverse rotations of the agitator. Existing.

[0003]

However, in the conventional spin-drying washing machine using the agitator as described above, it is possible to obtain sufficient detergency, especially in recent years when the capacity of the laundry is increased. Can not. In addition to that, the laundry is easily entangled with each other in the laundry, and becomes one large lump, which makes it difficult to take out. Further, the hardened laundry becomes an unbalanced load for rotating the tub during spin-drying, which easily causes abnormally large vibration in the tub.

The present invention has been made in view of the above circumstances, and therefore an object thereof is to obtain a sufficient cleaning power even for a large amount of laundry and to easily take out the laundry. It is an object of the present invention to provide a combined washing machine for dehydration that can reduce the occurrence of abnormal vibration during dehydration.

[0005]

In order to achieve the above object, in the washing machine for combined use of dehydration of the present invention, washing is performed by forward and reverse rotation of an agitator disposed at the inner bottom of the tub, and by rotation of the tub. In the case of dehydration, the above-mentioned agitator is formed into a shallow bowl-shaped base with a plane shape and a radial straight line projecting from the center on this base and inclined in either the forward or reverse rotation direction on the outer peripheral side. It is characterized in that it is formed in a form including a blade that is provided so as to protrude.

In this case, the height of the blade of the agitator may be set to be equal to or lower than the height of the outer peripheral edge portion of the base, and the height of the blade may be set so that the central portion side is smaller than the outer peripheral portion side. Further, the height of the mounting boss portion existing in the central portion of the base of the agitator may be set lower than the outer peripheral edge portion of the base.

On the other hand, the deviation size of the inclined portion with respect to the linear portion of the blade of the agitator at the outer peripheral edge of the base is preferably 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 between the outer peripheral end portion of the blade and a step above it.

A plurality of inclined ribs may be formed in the blade-to-blade portion on the base of the agitator, and the inclination angle of the inclined ribs may be varied depending on the position of the blade-to-blade portion on the base of the agitator.

[0009]

When the cause of insufficient detergency of the conventional washing machine for combined use of dehydration is investigated, the following has been found. That is, in the washing machine for combined use of dehydration, as is well known, the tub is cylindrical in order to perform dehydration by rotation, and the agitator is arranged concentrically at the inner bottom of the tub because it rotates together with it during dehydration. .

In this situation, according to a conventional stirring body in which the blades are symmetrically and equally present in both forward and reverse rotations during washing, the movement it imparts to the wash water and the laundry is approximately equal in both forward and reverse rotations. They are the same, and the power they give is almost the same. Therefore, the laundry moves in substantially the same movement for both forward and reverse rotations of the agitator, and moves approximately the same amount, and there is almost no change in the relative position. For this reason, the laundry is less likely to be replaced in the tub, and the entanglement between the laundry items becomes larger, and the tendency is remarkable especially when the laundry amount is large.

On the other hand, according to the stirrer of the present invention, the blades are projected on the base in a radial straight line on the central side and are projected on the outer peripheral side so as to be inclined in either one of the forward and reverse directions of rotation. The movement given to the washing water and the laundry is different between the forward and reverse rotations. Specifically, when the stirring body rotates in the inclination direction of the blade outer peripheral portion, the washing water is scraped and drawn inward, Therefore, the laundry is also pulled inward. On the other hand, when the agitator rotates in the direction opposite to the inclination direction of the outer peripheral portion of the blade, the wash water is pushed outward, and thus the laundry is also pushed outward.

Further, according to the agitator of the present invention, the force exerted by the agitator on the washing water and the laundry is different in both forward and reverse rotations. Specifically, the agitator rotates in the inclination direction of the outer peripheral portion of the blade. In doing so, the wash water is swirled strongly to produce a strong stream of water, and thus the laundry is swirled strongly. on the other hand,
When the agitator rotates in the direction opposite to the inclination direction of the blade outer peripheral portion, the wash water is rotated weaker than the above to generate a water flow weaker than the above, and thus the laundry is rotated weaker than the above.

Further, in the stirrer of the present invention, the base has a shallow bowl shape. According to this structure, when the laundry is drawn inward, it is easy to move toward the center of the stirring body, and when it is pushed outward, it is easy to move upward, and the radial movement is increased.

Thus, the washing water and the laundry are moved more complicatedly and actively than the conventional ones, and as a result, the repetition of deformation, compression, stretching, etc. of the laundry can be made larger and more active, and the washing power is improved. It is possible to reduce the entanglement of laundry.

Further, in particular, when the height of the blade of the agitator is set to be equal to or lower than the height of the outer peripheral edge portion of the base, the laundry can be more easily advanced toward the center of the agitator and the movement in the same direction can be achieved. It can be even larger. Even if the height of the blade is set so that the central part side is smaller than the outer peripheral part side, similarly, it is possible to further facilitate the laundry to move toward the center of the agitator and further increase the movement in the same direction. it can.

Further, even when the height of the mounting boss portion existing in the central portion of the base of the stirring body is set lower than that of the outer peripheral edge portion of the base, similarly, it is easy to further advance the laundry toward the center of the stirring body. This makes it possible to further increase the movement in the same direction. In addition, in this case, the laundry that has proceeded toward the center of the stirring body rubs against each other at the center of the laundry, and the washing power can be further improved.

On the other hand, when the deviation dimension of the inclined portion with respect to the linear portion of the blade of the agitator at the outer peripheral edge portion of the base is set to about 1/20 to 6/20 of the diameter of the base, the cleaning power is data-wise. Further, it is possible to obtain a better result in terms of ease of taking out the laundry, and less abnormal vibration during dehydration.

Further, in the case where the outer peripheral edge portion of the base of the agitator is formed in a ring shape having a step between the outer peripheral edge of the blade and the upper portion thereof, the rising portion of the step causes You can make it easier to move the laundry upward, and at the same time,
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 on the base portion of the stirrer between the blades, the laundry can be rubbed therewith to further improve the cleaning power. In addition, when the inclination angle of the inclined rib is changed depending on the position of the blade portion on the base of the agitator, the rubbing condition of the laundry can be complicated, and the cleaning power can be further improved. it can.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First of all, FIG. 2 shows an outer box 1 of the entire washing machine for combined use of dehydration, in which an outer tub 2 is arranged,
An inner tank 3 is arranged inside. A balance ring 4 is attached to the upper edge of the inner tank 3, and an agitator 5 is concentrically arranged in the inner bottom of FIG.

A drain valve 6 and a drive mechanism 8 mainly composed of a motor 7 are provided below the outer tub 2 so that the inner tub can be washed at the time of washing. 3 is stopped to rotate the stirring body 5 in both clockwise and counterclockwise directions, and the inner tank 3 is rotated in one direction at a high speed together with the stirring body 5 during dehydration. Therefore, the inner tub 3 is also used for washing and dewatering, and in particular, the dewatering is performed by the centrifugal force due to the above-mentioned high speed rotation, and the water contained in the laundry is dewatered by the dewatering holes 9 on the peripheral wall of the inner tub 3.
It is designed to be performed by shaking off and discharging from.

On the other hand, the stirrer 5 is, for example, a mold made entirely of plastic, and as shown in FIG. 1, a shallow bowl-shaped base 10 having a plane circular shape and a protrusion on the base 10. It is provided with, for example, six blades 11 provided, and more specifically, the blades 11 are provided so as to project in a radial straight line at the center side of the base 10, and either the forward or reverse direction of the stirring body 5 at the outer peripheral side. The protrusions are provided so as to be inclined in one rotation direction (in this case, the clockwise direction indicated by the arrow A), particularly, curved.

Further, the heights of the blades 11 are all set to be equal to or lower than the height of the outer peripheral edge portion 10a of the base 10, and the central portion side is smaller than the outer peripheral portion side. Further, a mounting boss 12 is formed in the center of the base 10, and the boss 12 is fitted on the washing output shaft 13 of the drive mechanism 8 and is mounted by the screw 14 (FIG. 2). However, the height of the boss portion 12 is equal to that of the outer peripheral edge portion 10 of the substrate 10.
It is set lower than a.

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

Next, the operation of the above structure will be described. At the time of washing, the drive mechanism 8 stops the inner tank 3 and
It is as described above that the rotor is rotated in both clockwise and counterclockwise directions, but when it is rotated in the clockwise direction, the agitator 5 tilts the outer peripheral portion of the blade 11 in the rotational direction. Therefore, the arrow A ′ is shown in FIGS. 4 and 5.
As shown by, the washing water in the inner tub 3 is scraped by its outer peripheral portion and drawn inward, and therefore the laundry is also drawn inward.

On the other hand, when the stirring member 5 is rotated counterclockwise, the inclination of the outer peripheral portion of the blade 11 is opposite to the rotation direction thereof, so that the arrow B'in FIGS. As shown, the wash water is pushed outwards, and thus the laundry is also pushed outwards.

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

On the other hand, when it is rotated counterclockwise, the agitator 5 rotates the washing water in the inner tub 3 weaker than the above to generate a weaker water flow than the above, and thus the laundry is washed from the above. Rotate weakly.

In addition to them, the stirring body 5 is the base 1
Since 0 is a shallow bowl shape, when the laundry is drawn inward, it is easy to move toward the center of the agitator 5, and when it is pushed outward, it is easy to move upward, and the radial movement growing.

Thus, in the case of this construction, the washing water and the laundry are moved more complicatedly and vigorously than the conventional ones, and as a result, the deformation, compression, stretching and the like of the laundry can be made large and vigorous. Since the detergency can be improved, a sufficient detergency can be obtained even for a large amount of laundry. In addition, since the laundry can be actively moved and the loosening effect is increased, it is possible to reduce the entanglement of the laundry. By reducing the entanglement of the laundry in this way, the laundry can be easily taken out. Further, it is possible to avoid an unbalanced load for rotating the tub when the laundry is dehydrated, and it is possible to reduce the occurrence of abnormal vibration of the tub.

FIG. 7 shows the test results of a spin-drying washing machine equipped with the stirring body 5 of the present invention and a conventional spin-drying washing machine equipped with the stirring body 5. As is clear from FIG. 7,
The dewatering combined washing machine of the present invention is superior to the conventional dewatering combined washing machine in all of the high washing ratio, the small uneven washing, the short take-out time of the cloth (laundry), and the small vibration amplitude. It gives good results.

In addition, particularly 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 lower than the height of the outer peripheral edge portion 10a of the base 10, the laundry is moved toward the center of the stirring body 5. It is possible to proceed more easily, and it is possible to further increase the movement in the same direction, which is more effective in improving the cleaning power.

Further, since the height of the blades 11 is set so that the central portion side is smaller than the outer peripheral portion side, the laundry can be further easily advanced toward the center of the stirring body 5 in the same direction as described above. The movement of can be further increased, and the cleaning power can be further improved.

Further, since the height of the mounting boss portion 12 existing in the central portion of the base 10 is set lower than that of the outer peripheral edge portion 10a of the base 10, the agitator 5 is also used to wash the laundry in the same manner as described above.
It is possible to more easily proceed to the center direction of the, and it is possible to further increase the movement in the same direction, 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 thereof, and it is possible to further improve the cleaning power.

FIG. 8 shows the results when the deviation dimension d in the outer peripheral edge portion 10a of the base portion of the inclined portion with respect to the linear portion of the blade 11 was set variously with respect to the diameter D of the base material 10 and tested. As is clear from FIG. 8, the blade 1
The deviation dimension d in the outer peripheral edge portion 10a of the base portion of the inclined portion with respect to the straight line portion of 1 is about 1/20 of the diameter D of the base 10.
By setting to 6/20, it is possible to obtain a better result in terms of data 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 Figure 8.
Represents the characteristics of.

On the other hand, since the outer peripheral edge portion 10a of the base 10 is formed in a ring shape having a step s between the outer peripheral edge portion of the blade 11 and the step s, the step s rises. The portion makes it possible to further facilitate the upward movement of the laundry, thus improving the cleaning power and increasing the loosening effect of the laundry, and at the same time, the ring-shaped configuration of the base outer peripheral edge portion 10a allows the stirring body 5 to move. Strength can be increased.

Since a plurality of inclined ribs 15 are formed on the base 10 between the blades 11, it is possible to rub the laundry with it and further improve the cleaning power.
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 rubbing condition of the laundry can be complicated and the cleaning power can be further improved. it can.

[0038]

The washing machine for combined use of dehydration of the present invention is as described above, and has the following effects. First, in a case where washing is carried out by forward and reverse rotation of an agitator disposed at the inner bottom of the tub and dehydration is performed by rotation of the tub, the agitator is a plane circular shallow bowl-shaped base and this base. Since it is formed in a form having a radiating line protruding upward on the center side and protruding on the outer peripheral side so as to incline in either one of the forward and reverse rotation directions, a large amount of laundry can be washed. However, sufficient washing power can be obtained, the laundry can be easily taken out, and abnormal vibration during dehydration can be reduced.

Secondly, by setting the height of the blades of the agitator below the height of the outer peripheral edge of the base, the cleaning power can be further improved. Thirdly, by setting the height of the blades of the stirring body so that the central portion side is smaller than the outer peripheral portion side, it is possible to further improve the cleaning power as described above. Fourthly, the stirring body has a boss portion for mounting in the center of the base, and the height of the boss is set lower than the outer peripheral edge portion of the base, so that the cleaning power can be further improved. You can

Fifth, since the deviation dimension of the inclined portion with respect to the linear portion of the blade of the stirring member at the outer peripheral edge of the base is set to about 1/20 to 6/20 of the diameter of the base,
It is possible to obtain even better results in terms of detergency, ease of taking out the laundry, and less abnormal vibration during dehydration.
Sixth, since the outer peripheral edge of the base of the agitator is formed in a ring shape having a step between it and the outer peripheral end of the blade and positioned above it, the cleaning power can be improved. In addition, the effect of loosening laundry can be increased, and the strength of the stirring body can be further increased.

Seventhly, by forming a plurality of inclined ribs in the inter-blade portion on the base of the stirring body, it is possible to further improve the cleaning power. Eighth, the cleaning power can be further improved by varying the inclination angle of the inclined rib depending on the position of the blade portion on the base of the stirring body.

[Brief description of drawings]

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

[Fig. 2] Side view of the entire fracture

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

FIG. 4 is a partially enlarged plan view of a stirring body for explaining the operation.

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

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

[Figure 7] Test data diagram

[Figure 8] Different test data diagram

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

[Explanation of symbols]

3 is an inner tank (tank), 5 is an agitator, 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 represents the step between the outer peripheral edge of the base and the outer peripheral end of the blade.

Claims (8)

[Claims] 1. An agitator provided on the inner bottom of a tub for washing by forward / reverse rotation and dehydration by rotating the tub, wherein the agitator is a shallow bowl-shaped base having a plane shape, and A washing machine for both dehydration and drainage, characterized in that the washing machine is formed in such a manner that it is provided with a vane projecting radially in a central direction on the base and projecting so as to incline in either the forward or reverse direction on the outer circumferential side. Machine. 2. The washing machine for combined use of dehydration according to claim 1, wherein the height of the blade of the agitator is set to be equal to or lower than the height of the outer peripheral edge portion of the base. 3. The height of the blade of the agitator is set so that the central portion side is smaller than the outer peripheral portion side.
Washing machine for combined use of dehydration. 4. The combined use of dehydration as claimed in claim 1, wherein the agitator has a boss portion for attachment at the center of the base, and the height of the boss is set lower than that of the outer peripheral edge portion of the base. Washing machine. 5. The deviation size in the outer peripheral edge of the base of the inclined portion with respect to the linear portion of the blade of the agitator is set to be about 1/20 to 6/20 of the diameter of the base. Washing machine for both dehydration. 6. The outer peripheral edge portion of the base of the agitator is formed in a ring shape having a step between the outer peripheral edge portion of the blade and an upper edge thereof. Washing machine for combined use of dehydration. 7. The washing machine for combined use of dehydration 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 washing machine for combined use of dehydration according to claim 7, wherein the inclination angle of the inclined ribs is varied depending on the position of the inter-blade portion on the base of the stirring body.