JPH0810495A - Washing machine - Google Patents

Abstract

PURPOSE:To provide a washing machine capable of suppressing an increase in the use amt. of water and the dehydration insufficiency caused by foaming and capable of smoothly changing the direction of pumped-up water. CONSTITUTION:In the communication water channel 16 allowing recessed place 8 in which stirring blades are installed to communicate with a vertical water channel 15, the bottom square wall of a washing and dehydration tub is inclined so as to linearly rise toward a side wall 14. The bottom square wall is not too large in a protruding degree and the water present between the washing and dehydration tub and an outer tank is not agitated too much and foaming is reduced and the washing and dehydration tank is well rotated. The direction of the water pumped up by the back vanes 10 of the stirring blades 9 is smoothly changed upwardly along the inclination of the bottom square wall. The bottom square wall 20 of the outer tank is inclined over the entire periphery thereof so as to follow the bottom square wall of the washing and dehydration tank. The amt. of wasteful water stored in the gap between the washing and dehydration tank and the outer tank is little.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a washing machine, and more particularly to a fully automatic washing machine.

[0002]

2. Description of the Related Art In a general fully automatic washing machine, FIG.
As described above, a washing / dehydrating tub 51 is arranged in the outer tub 50, a recess 52 is formed in the bottom of the washing / dehydrating tub 51, and a stirring blade (not shown) is arranged in the recess 52. ing. During washing, only the stirring blade is rotationally driven, and at the time of dehydration, both the stirring blade and the washing / dehydrating tank 51 are rotationally driven at high speed.

A side wall 53 of the washing / dehydrating tub 51 is also provided.
A vertical water channel 54 is provided in the tank along the vertical direction, and the recess 52 and the vertical water channel 5 are provided at the bottom corner of the washing / dehydrating tank 51.
4 is formed by partially projecting the corner portion to the outside of the tank. In this case, at the time of washing, the water in the recess 52 of the washing / dehydrating tank 51 is removed by the action of the back blade provided on the back side of the stirring blade.
The water is pumped up through the connecting water passage 55, rises through the vertical water passage 54, and then joins the water in the washing / dehydrating tank 51. As a result, a vertical water flow is generated in the washing / dehydrating tub 51 to promote the upside-down of the laundry, and good washing performance can be obtained. Alternatively, if the upper end of the vertical water channel 54 is located above the water surface and a lint filter is provided there, lint debris can be captured.

[0004]

However, in such a washing machine, the connecting water passage 55 is prevented from undesirably hitting the outer tub 50 even if it rotates together with the washing / dehydrating tub 51 during dewatering. In addition, the bottom corner portion of the outer tub 50 is largely projected over the entire circumference. Therefore, the washing / dehydrating tub 51 and the outer tub 50 are not compatible with the communication water passage 55.
The gap 56 between the and is large, water wasted here,
There is a problem that the amount of water used increases to that extent.

Further, in order to form the connecting water passage 55, the corner wall 57 at the bottom corner of the washing / dehydrating tub 51 corresponding to this portion is the bottom corner wall 58 of the other washing / dehydrating tub 51.
It is more prominent than As a result, when the washing / dehydrating tub 51 is rotated at a high speed during dewatering, the projecting bottom corner wall 57 functions to stir the water in the gap 56 and vigorously foams due to the action of the detergent contained in the water. Becomes resistance to the washing / dehydrating tub 51 and prevents the rotation speed of the washing / dehydrating tub 51 from increasing, resulting in insufficient dehydration.

Further, the water pumped up by the action of the back blades of the stirring blade first flows laterally toward the connecting water channel 55, and is turned upward by 90 ° in the connecting water channel 55 so that the water flows through the vertical water channel 54. The water flow resistance is large in the connecting water passage 55 which changes its direction by 90 °, so that the momentum of the water flow is weakened and it is difficult to obtain a desired water amount.

Therefore, as in the fully-automatic washing machine disclosed in Japanese Utility Model Publication No. 63-1986, it is conceivable to incline the bottom corner wall 57 of the washing / dehydrating tank 51 forming the communication water passage 55. However, in this case, since the protrusion of the bottom corner wall 57 is small, bubbling at the time of dewatering is small, insufficient dewatering can be suppressed, and the direction of pumped water can be smoothly changed along the slope to increase the force of water flow. Although not weakened, the gap 56 between the washing / dehydrating tub 51 and the outer tub 50 is still large and the amount of water used cannot be suppressed.

The present invention is intended to provide a washing machine capable of suppressing an increase in the amount of water used, suppressing a dehydration shortage due to foaming, and further smoothly changing the direction of pumped water. is there.

[0009]

The washing machine of the present invention comprises an outer tub, a washing / dehydrating tub arranged in the outer tub, and a recess formed in the bottom of the washing / dehydrating tub. An agitating blade arranged in this recess, a drive unit for rotationally driving only the agitating blade during washing, and a high-speed rotational drive for both the agitating blade and the washing / dewatering tub during dewatering, and the back of the agitating blade during washing. A vertical water channel formed vertically along the side wall of the washing / dehydrating tank through which water pumped up by the blades passes, and the recess formed in a corner of the bottom of the washing / dehydrating tank. A connecting water channel communicating with the vertical water channel, the bottom corner wall of the washing / dehydrating tub constituting this connecting water channel is inclined so as to linearly rise toward the side wall, and The bottom corner wall of the above-mentioned washing and dehydrating tub is covered all around the bottom corner wall. It is incidental, characterized in that by being inclined. The inclination angle of the bottom square wall of the washing / dehydrating tub is more than 90 ° and 150 ° or less inside the tub with respect to the bottom wall of the washing / dehydrating tub.

[0010]

[Function] In the connecting water channel that connects the recess in which the stirring blades are arranged and the vertical water channel, the bottom corner wall of the washing / dehydrating tub forming the connecting water channel linearly moves toward the side wall of the washing / dehydrating tub. It is inclined to rise.

As a result, the above-mentioned bottom square wall is not so much protruded as compared with the bottom square walls of the other washing / dehydrating tubs, and even if the washing / dehydrating tub rotates at high speed during dewatering, the washing / dehydrating tub is rotated. The water between the outer tub and the outer tub is not agitated so much that there is little foaming due to the detergent contained in the water, the resistance to the washing / dehydrating tub does not increase, and the rotation speed of the washing / dehydrating tub is sufficient. Ascends and dehydration is performed without any shortage.

The water pumped up by the action of the back blades of the stirring blade first flows laterally toward the connecting water channel, and is turned upward in the connecting water channel to rise through the vertical water channel. However, in this case, the direction of the water pumped up smoothly changes along the above-mentioned inclination, and the desired amount of water is obtained without weakening the momentum of the water flow.

Further, the bottom corner wall of the outer tank is
It is inclined to follow the bottom corner wall of the washing and dehydrating tub. As a result, the gap between the washing / dehydrating tub and the outer tub is small, the amount of waste water accumulated in this gap is small, and the amount of water used is suppressed accordingly.

[0014]

1 shows the structure of a fully automatic washing machine according to an embodiment of the present invention.
A description will be given based on FIG. Reference numeral 1 is a machine frame, 2 is an outer tank made of resin suspended and supported by four suspension bars 3 inside the machine frame 1, 4 is a vibration-proof spring, and the like. An anti-vibration device 5 interposed therebetween has a multiplicity of dehydration holes 6 in the periphery thereof, and is a stainless steel washing / dehydrating tank rotatably supported in the outer tub 2, and 7 is this washing / dehydrating tank. 5
It is a balance ring fixed to the upper end of. 8 is a recess formed in the bottom of the washing / dehydrating tub 5, 9 is a rotary blade having a back blade 10 rotatably disposed in the recess 8, 11 is the washing / dehydrating tub 5 And a drive unit, that is, a drive motor, which is connected to the rotary wing 9 via a power transmission mechanism 12,
The drive motor 11 rotates only the rotary blade 9 during washing and rinsing, and the washing / dehydrating tub 5 and the rotary blade 9 during dehydration.
Rotate both in one direction at high speed.

Reference numeral 13 denotes a water channel cover made of resin which is vertically mounted on the inner surface of the side wall 14 of the washing / dehydrating tank 5, and 15 extends vertically along the side wall 14 by the water channel cover 13 and the side wall 14. It is a vertical waterway formed in this way. The vertical water channel 15 extends upward to the lower side of the balance ring 7 as a thread waste catching channel, and the upper end is located above the highest water level used during washing / rinsing in the washing / dehydrating tank 5. A filter (not shown) for capturing lint is detachably attached.

Reference numeral 16 denotes a connecting water passage formed at a corner of the bottom of the washing / dehydrating tub 5 for connecting the recess 8 and the vertical water passage 15. The connecting water channel 16 includes a bottom corner wall 17 of the washing / dehydrating tank 5 and a downward extension 18 of the water channel cover 13.
And one end opening of the communication water channel 16 is connected to the recess 8 from the side, and the other end opening is the vertical water channel 15
It is connected to the lower end opening.

The bottom corner wall 17 of the washing / dehydrating tub 5 constituting the connecting water channel 16 is inclined so as to linearly rise toward the side wall 14 of the washing / dehydrating tub 5, and 5 is connected to the side wall 14 and the bottom wall 19 with a roundness, and the height thereof is 1/4 or less of the height of the washing / dehydrating tub 5. The inclination angle of the bottom square wall 17 is more than 90 ° and 150 ° or less inside the tub with respect to the bottom wall 19 of the washing / dehydrating tub 5.

Further, the downward extension 1 of the water channel cover 13
8 also follows the bottom corner wall 17 of the washing / dehydrating tub 5 and is linearly inclined at the same angle. In the outer tub 2,
The bottom square wall 20 follows the bottom square wall 17 of the washing / dehydrating tub 5 over the entire circumference and is linearly inclined at the same angle.

In the above structure, when the drive motor 11 is driven to rotate the stirring blade 9 during washing / rinsing, the stirring blade 9 is rotated.
The water in the recess 8 is pumped up by the action of the back blade 10 of this, and the pumped-up water is discharged from the upper end through the vertical water channel 15, and the thread waste is captured by the thread waste capturing filter. After that, it falls into the washing / dehydrating tank 5 and joins the water in the tank. In this case, water existing between the outer tub 2 and the washing / dehydrating tub 5 passes through a hole (not shown) formed in the bottom wall 19 of the washing / dehydrating tub 5 into the recess 8 and is newly added. Get in. Then, the water in the washing / dehydrating tub 5 reaches between the outer tub 2 and the washing / dehydrating tub 5 through the dewatering holes 6 of the washing / dehydrating tub 5.

When the drive motor 11 is driven at the time of dehydration to rotate both the stirring blade 9 and the washing / dehydrating tub 5 at a high speed, the water squeezed from the laundry passes through the dewatering hole 6 to the washing / dehydrating tub 5. It reaches the outer tank 2. If the amount of this water is large, then it is sequentially discharged through a drain valve (not shown).

Thus, in such a fully automatic washing machine, the bottom corner wall 17 of the washing / dehydrating tub 5 projects outward, but the degree of projection is different for the other washing / dehydrating tubs 5. Compared with the bottom square wall 21 of FIG. Therefore, in the situation where the water squeezed from the laundry at the time of spin-drying is not drained even between the washing / dehydrating tub 5 and the outer tub 2, even if the washing / dehydrating tub 5 rotates at high speed, The water between the combined / dehydration tank 5 and the outer tank 2 is not agitated so much that the detergent contained in the water hardly foams the foam, and the resistance to the washing / dehydration tank 5 due to the foam does not increase. The rotation speed of is sufficiently increased and dehydration is performed without any shortage.

Further, the water pumped up by the action of the back vane 10 of the stirring blade 9 first flows laterally toward the connecting water channel 16, and then is turned upward in the connecting water channel 16 to flow in the vertical water channel 15. However, in this case, the direction of the water to be pumped up smoothly changes along the inclination of the bottom corner wall 17, and the force of the water flow is not weakened, and the desired amount of water is obtained. Water channel cover 1
The lower extension 18 of 3 is also the bottom corner wall 17 of the washing / dehydrating tub 5.
Following the above, it is inclined at the same angle.
6 does not become narrow on the way, and a desired amount of water can be obtained in this respect as well.

Furthermore, the bottom square wall 20 of the outer tub 2 is inclined over the entire circumference following the bottom square wall 17 of the washing / dehydrating tub 5. As a result, the gap 22 between the washing / dehydrating tub 5 and the outer tub 2 is smaller than in the conventional case, and the amount of waste water accumulated in the gap 22 is small.
The amount of water used during rinsing is suppressed.

Next, the structure of a fully automatic washing machine according to another embodiment of the present invention will be described with reference to FIGS. The same parts as those in the above embodiment are designated by the same reference numerals and the description thereof will be omitted.

Reference numerals 23 to 25 are additional resin water channel covers vertically mounted on the inner surface of the side wall 14 of the washing / dehydrating tank 5.
Reference numerals 26 to 28 are further vertical water channels formed by the water channel covers 23 to 25 and the side wall 14 so as to extend in the vertical direction along the side wall 14. Of these vertical water channels 26 to 28, the vertical water channel 26 is Balance ring 7 as in the vertical channel 15
Extends upward to the lower side, and the upper end is located above the maximum water level used for washing / rinsing in the washing / dehydrating tub 5,
It is on the opposite side of the vertical channel 15.

The remaining two vertical water channels 27 and 28 extend upward only to a lower position, and the upper ends thereof are located below the minimum water level used for washing / rinsing in the washing / dehydrating tank 5. There is. That is, the upper ends of the vertical water channels 27 and 28 are below the water surface. The three vertical channels 27, 28 and the vertical channel 26 are equally spaced from each other, that is, about 120 °.
Spaced apart.

Numerals 29 to 31 are further connecting water passages which are formed at the corners of the bottom of the washing and dehydrating tub 5 and which connect the recess 8 and the vertical water passages 26 to 28. These connecting waterways 29
Since the vicinity of ~ 31 has the same structure as the vicinity of the connecting water channel 16, the description thereof will be omitted.

As described in the previous embodiment, the above-described structure has the following effects in addition to the fact that dehydration can be performed without fail and the amount of water used can be suppressed.

That is, when the stirring blade is rotated at the time of washing / rinsing, the water in the recess 8 is pumped up by the action of the back blade of the stirring blade, and the pumped-up water is stored in the vertical water channel 15 in addition to the vertical water channel 15. The water discharged from the upper end of the vertical water channel 26 through the additional vertical water channels 26 to 28 flies in the lateral direction with the force of the discharge (and the upper end of the vertical water channel 26 has a structure for discharging the water in the horizontal direction). Therefore, the water discharged from the upper end of the vertical water passage 26 is then discharged and dropped near the center of the washing / dehydrating tank 5. The water discharged from the upper ends of the vertical water channels 27, 28 vigorously moves upward along the side wall 14 of the washing / dehydrating tub 5 (and the upper ends of the vertical water channels 27, 28 have a structure for forcefully directing the discharged water upward). are doing).

In this case, the water discharged from the vertical water channel 26 falls on the laundry in the washing / dehydrating tub 5, and even if there is a large amount of laundry and there is a portion not submerged in water, Soak this part in water quickly. In addition, the falling water plays a role of pressing down the laundry from above, preventing the laundry from floating and promoting the submersion of the laundry.

Further, the water discharged from the vertical water channel 26 falls near the center of the washing / dehydrating tank 5 to lower the water near the center, while the water discharged from the vertical water channels 27 and 28 is washed / dewatering tank. The water in the vicinity is raised along the side wall 14 of 5, and as a result, the up and down water flow of rising in the periphery in the washing / dehydrating tank 5 and descending in the vicinity of the center actively occurs, and the laundry is actively turned upside down. To do. Therefore, even if the amount of laundry is large, the cloth can be effectively washed, and the cleaning can be performed efficiently and evenly.

Furthermore, in order to circulate a large amount of water in the washing / dehydrating tank 5 through the vertical water channel 26 and the vertical water channels 27 and 28 to generate a vertical flow, that is, the water moves violently.
At the time of washing, the detergent dissolves quickly and well, so that the laundry is thoroughly washed. Moreover, the undissolved residue of the detergent is eliminated, and an environment in which black mold is unlikely to occur is obtained.

[0033]

EFFECT OF THE INVENTION According to the washing machine of the present invention, in the connecting water channel that connects the recess where the stirring blades are arranged and the vertical water channel, the bottom corner wall of the washing and dehydrating tub that constitutes this connecting water channel is washed. It is inclined so that it rises linearly as it goes to the side wall of the combined dehydration tub, so that even if the combined washing and dehydration tub rotates at high speed during dehydration, it will be between the washing and dehydration tub and the outer tub. The water is not agitated so much that the foaming caused by the detergent contained in the water can be reduced, and the foam resistance to the washing / dehydrating tub can be suppressed. Therefore, the washing / dehydrating tub can be rotated sufficiently to perform dewatering without insufficiency. it can.

Furthermore, the water pumped up by the action of the back blade of the stirring blade can be smoothly changed upward in the connecting water passage, and the desired amount of water can be obtained without reducing the force of the water flow.

Furthermore, the bottom corner wall of the outer tank also covers the entire circumference,
It is tilted to follow the bottom corner wall of the washing / dehydrating tub, which reduces the amount of wasted water that accumulates in the gap between the washing / dehydrating tub and the outer tub, thus reducing the amount of water used. be able to.

[Brief description of drawings]

FIG. 1 is a sectional view of a fully automatic washing machine according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of an outer tub and a washing / dehydrating tub in the same washing machine.

FIG. 3 is a sectional view of a washing / dehydrating tub in a fully automatic washing machine according to another embodiment of the present invention.

4 is a cross-sectional view taken along the line AA of FIG.

5 is a sectional view taken along line BB of FIG.

FIG. 6 is a sectional view of an outer tub and a washing / dehydrating tub in a conventional fully automatic washing machine.

[Explanation of symbols] 2 Outer tub 5 Washing / dehydrating tub 8 Recess 9 Stirrer 10 Back blade 11 Drive motor 15, 26, 27, 28 Vertical water channel 16, 29, 30, 31 Connecting water channel 17 Bottom of washing / dehydrating tub Square wall 20 Bottom corner wall of outer tank

Claims (2)

[Claims] 1. An outer tub, a washing / dehydrating tub arranged in the outer tub, a recess formed in the bottom of the washing / dehydrating tub, and a stirring blade arranged in the recess. A drive unit that rotates and drives only the stirring blade during washing, and drives the stirring blade and the washing / dewatering tank at high speed during dewatering, and water that is pumped up by the back blade of the stirring blade during washing passes. The washing / dehydrating tub is provided with a vertical water channel formed in a vertical direction along the side wall, and a connecting water channel formed at a corner of the bottom of the washing / dehydrating tub for connecting the recess and the vertical water channel. , The bottom corner wall of the washing / dehydrating tub constituting the communication water channel is inclined so as to rise linearly toward the side wall, and the bottom corner wall of the outer tub is covered over the entire circumference. Characterized by being tilted to follow the bottom corner wall of the dehydration tank Washing machine. 2. The angle of inclination of the bottom square wall of the washing / dehydrating tub is more than 90 ° inside the tub with respect to the bottom wall of the washing / dehydrating tub.
The washing machine according to claim 1, wherein the washing machine is 0 ° or less.