JPH07132190A - Washing machine - Google Patents

Abstract

PURPOSE:To provide the washing machine which can prevent wash from becoming like a lump in a spindrying tub in the course of washing, and also, can secure the prescribed content volume of the spindrying tub without enlarging external dimensions. CONSTITUTION:On the inside surface of a bottom wall 9 of a spindrying tub 3, an annular part 9b is provided in a state of surrounding a pulsator 4. The annular part 9b is provided with nine pieces of flat parts 9c of the same shape and the same size provided at a prescribed interval to each other in the peripheral direction, and ten pieces of recessed parts of the same shape and the same size provided adjacently to the respective flat parts 9c. Planar shapes of each flat part 9c and recessed part are all fan shapes centering around a center point on the inside surface of the bottom wall 9 of the spindrying tub 3. In each recessed part, a through-hole 12 for allowing water to flow through a space between the spindrying tub and an outer tub 2 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine, and more specifically, to a washing / dehydrating tub rotatably provided about a substantially vertical rotation axis and an inner surface of a bottom wall of the washing / dehydrating tub. The present invention relates to a washing machine provided with a pulsator rotatably provided around a rotation axis substantially vertical to the side.

[0002]

2. Description of the Related Art Conventionally, as this type of washing machine, a washing / dehydrating tub 51 and a pulsator 61 as shown in FIGS.
A washing machine having and is known. That is, the washing / dehydrating tub 51 of the washing machine has a bottomed cylindrical shape, a planar shape of which is substantially circular, and a bottom wall 52 having a recess 52a at the center of the inner surface.
And a substantially vertical peripheral wall 53 that is continuous with the bottom wall 52. The washing / dehydrating tub 51 is disposed inside an outer tub (not shown) and can rotate about a substantially vertical rotation axis. Further, the pulsator 61 is arranged upward in the recess 52a of the bottom wall 52 of the washing / dehydrating tub 51, and is rotatably attached to a substantially vertical rotation shaft.

An annular flat portion 52b is provided around the recess 52a on the inner surface of the bottom wall 52 of the washing / dehydrating tub 51. Further, the bottom wall 5 is provided around the flat portion 52b.
A plurality of protrusions 52c are formed from the peripheral edge of the inner surface of 2 to the lower peripheral edge of the inner surface of the peripheral wall 53. Each of these protrusions 52c has a vertical cross-sectional shape that extends in the radial direction and has a substantially isosceles triangular shape, and is arranged in the circumferential direction at predetermined intervals.

A protrusion 52 formed on the washing / dehydrating tub 51
c is for preventing the laundry from becoming a dumpling in the washing / dehydrating tub 51 during washing. That is, since the water flow hits these protrusions 52c and moves in a complicated manner, the laundry can be easily swapped up and down in the washing / dehydrating tub 51.

[0005]

Such a protrusion 52 is provided.
In the washing / dehydrating tub 51 in which the c is formed, the internal volume of the washing / dehydrating tub 51 is smaller than that of the washing / dehydrating tub without the protrusions 52c, and thus the laundry capacity is small. Therefore, in order to obtain the same internal volume as that of the washing / dehydrating tub without the protrusion 52c, the diameter or depth of the washing / dehydrating tub 51 must be increased, and the outer dimension of the washing machine becomes large. There was a problem.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent the laundry from being dumpling-like in the washing / dehydrating tub during washing and to have an external shape. It is an object of the present invention to provide a washing machine capable of ensuring a constant inner volume of a washing / dehydrating tub without increasing the size.

[0007]

According to the present invention, the box body, the outer tub provided in the box body, and the rotatably provided in the outer tub about a substantially vertical rotation axis are provided. It has a cylindrical bottom washing / dehydrating tub and a pulsator rotatably provided on the inner surface of the bottom wall of the washing / dehydrating tub so as to be rotatable around a rotation axis substantially vertical. An annular portion is provided around the pulsator in a state surrounding the pulsator, and the annular portion is provided between a plurality of flat portions provided at predetermined intervals in the circumferential direction and between these flat portions. Provided is a washing machine including a plurality of recessed portions, each of which is provided with a through hole for circulating water between the washing / dehydrating tub and the outer tub in each of the recessed portions of the annular portion. .

[0008]

The pulsator is usually fitted in a fitting recess formed in the center of the inner surface of the bottom wall of the washing / dehydrating tub, and is arranged substantially in the center of the inner surface of the bottom wall where no such recess is formed. May be. The position and size of the annular portion provided on the inner surface of the bottom wall of the washing / dehydrating tub are appropriately determined according to the internal volume of the washing / dehydrating tub, the shape and diameter of the pulsator, and the like.

The annular portion has a flat portion and a recessed portion. For example, nine flat portions having the same shape and size are provided at predetermined intervals in the circumferential direction. For example, the recessed portions of the same shape and the same size are formed adjacent to each flat portion.
The individual pieces are provided at predetermined intervals in the circumferential direction. Such a recessed part causes a complicated water flow in the washing / dehydrating tub as washing water and laundry move in and out of these parts during the washing / dehydrating tub during washing. Make it easy to swap the top and bottom.

The total plane area of the plurality of recesses provided in the annular portion should be more than half of the plane area of the annular portion in order to more easily up and down the laundry in the washing / dehydrating tub. Preferably. The planar shape of the flat portion and the recessed portion is not particularly limited, but both are preferably fan-shaped with the center of the inner surface of the bottom wall of the washing / dehydrating tub as the center. When the plurality of flat portions and the recessed portion are formed in such a fan shape, the size of the central angle of one fan-shaped recessed portion is set to 1
It is preferable to make it larger than that of the fan-shaped flat portion.

The through holes provided in the recesses allow water to flow between the washing / dehydrating tub and the outer tub during washing, and, together with the recesses, cause a more complicated water flow. The position, shape, size and the like of the through hole are appropriately determined according to the internal volume of the washing / dehydrating tub and the shape and size of the recessed portion.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to one embodiment shown in the drawings. The present invention is not limited to this.

1 to 3, a washing machine W is provided with a vertically long substantially rectangular parallelepiped box body 1, an outer tub (water receiver) 2 provided in the box body 1, and an outer tub 2. It has a bottomed cylindrical washing / dehydrating tub 3 and a pulsator 4 provided at the bottom of the washing / dehydrating tub 3. A drive motor 5 is arranged below the outer tub 2. The driving force of the motor 5 is transmitted to the mechanism portion 8 by the motor pulley 6 and the V belt 7.

The mechanism section 8 is provided with a clutch mechanism and a brake mechanism. The washing / dehydrating tub 3 is connected to a vertical outer rotary shaft 8a of the mechanism unit 8.
It can be rotated around. The pulsator 4 is connected to a vertical inner rotating shaft 8b of the mechanism portion 8 and is rotatable around the rotating shaft 8b. Pulsator 4
The diameter of is about 80% of the inner diameter of the washing / dehydrating tub 3.

The washing / dehydrating tub 3 comprises a bottom wall 9 having a substantially circular plane shape and a recess 9a in the center of the inner surface, and a substantially vertical peripheral wall 10 connected to the bottom wall 9. The pulsator 4 is fitted upward in the recess 9a of the bottom wall 9. A large number of water circulation holes for circulating washing water between the outer tub 2 and the washing / dehydrating tub 3 are formed in the peripheral wall 10. 1
1 is a hanging rod. The suspension bar 11 reduces vibration and noise of the washing / dehydrating tub 3 during washing.

On the inner surface of the bottom wall 9 of the washing / dehydrating tub 3, around the recess 9a, an annular portion 9b is provided so as to surround the pulsator 4. The plane width of the annular portion 9b is about 15% of the inner diameter of the washing / dehydrating tub 3, and the outer edge is continuous with the lower portion of the inner surface of the peripheral wall 10 of the washing / dehydrating tub 3. The annular portion 9b has nine flat portions 9c of the same shape and size that are provided at predetermined intervals in the circumferential direction, and ten flat portions 9c of the same shape and size that are provided adjacent to each flat portion 9c. It is mainly composed of the recessed portion 9d.

The planar shape of each flat portion 9c and each recessed portion 9d is a fan shape centered on the center point O of the inner surface of the bottom wall of the washing / dehydrating tub 3. The fan-shaped central angle θ ₁ of each flat portion 9c is 10 °, and the central angle θ ₂ of each recessed portion 9d.
Is 20 degrees. Here, the two central angles θ ₁ and θ ₂ are set to such values, because if they are such values, there is no possibility that washing water will stagnant in the recessed portion 9d during washing.
This is because it was found by experiments.

Each flat portion 9c is substantially horizontal. Each recessed portion 9d has a curved shape in which the inner edge side is deep, the outer edge side is shallow, and the outer edge side is located above the inner edge side.
Such a recessed portion 9d is complicated in the washing / dehydrating tub 3 as washing water and laundry move in and out of the recessed portion 9d during the washing. Causes water flow, making it easier to swap laundry up and down.

A through hole 1 is formed in each recess 9d of the annular portion 9b.
Two are provided. This through hole 12 is for allowing water to flow between the washing / dehydrating tub 3 and the outer tub 2 during washing, and causes a more complicated water flow together with the recessed portions 9d.

In this washing machine W, the washing / dehydrating tub 3
Nine flat portions 9c and ten recessed portions 9d are provided on the inner surface of the bottom wall 9, and through holes 12 are provided in each recessed portion 9d. When the pulsator 4 rotates during washing, the water flow trying to enter the recess 9d, the water flowing out of the recess 9d, and the flat part 9c are circled inside the washing / dehydrating tub 3. A complex water flow can be created by a water flow moving in the circumferential direction, a water flow passing through the through holes 12, and the like. Therefore, the laundry inside the washing / dehydrating tub 3 is easily swapped up and down, and it is possible to prevent the laundry from becoming a dumpling inside the washing / dehydrating tub 3.

Further, in this washing machine W, since the flat portion 9c and the recessed portion 9d are provided on the inner surface of the bottom wall 9 of the washing / dehydrating tub 3, there is no protrusion as in the conventional case. It is possible to secure a constant internal volume of the washing / dehydrating tub 3 without increasing the outer dimensions.

[0022]

EFFECTS OF THE INVENTION Since the washing machine according to the present invention is constructed as described above, when the pulsator rotates during washing, the flow of water that tends to enter the concave portion inside the washing / dehydrating tub, the concave A complex water flow can be created by a water flow attempting to leave a local portion, a water flow moving circumferentially over a flat portion, a water flow passing through a through hole, and the like. Therefore, the laundry inside the washing / dehydrating tub can be easily swapped up and down, and it is possible to prevent the laundry from becoming a dumpling inside the washing / dehydrating tub. Further, since there is no protrusion on the inner surface of the bottom wall of the washing / dehydrating tub as in the conventional case, it is possible to secure a constant inner volume of the washing / dehydrating tub without increasing the outer dimensions.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a central portion of a washing machine according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a central portion of a washing / dehydrating tub and a pulsator that constitute the washing machine.

FIG. 3 is a plan view of a washing / dehydrating tub and a pulsator that constitute the washing machine.

FIG. 4 is a vertical cross-sectional view of a central portion of a washing / dehydrating tub and a pulsator that constitute a conventional washing machine.

FIG. 5 is a plan view of a washing / dehydrating tub and a pulsator constituting the washing machine.

[Explanation of symbols]

 1 Box 2 Outer tub 3 Washing / dehydrating tub 4 Pulsator 5 Motor 6 Motor pulley 7 V belt 8 Mechanism part 8a Rotating shaft 8b Rotating shaft 9 Bottom wall 9a Recess 9b Annular part 9c Flat part 9d Recess part 10 Circumferential wall 11 Hanging bar 12 Through hole

Claims (1)

[Claims] 1. A box body, an outer tub provided in the box body, and a bottomed cylindrical washing / dehydrating tub rotatably provided in the outer tub about a substantially vertical rotation axis. A pulsator provided rotatably around a rotation axis substantially vertical to the inner surface of the bottom wall of the washing / dehydrating tub, and around the pulsator on the inner surface of the bottom wall of the washing / dehydrating tub,
An annular portion is provided around the pulsator, and the annular portion has a plurality of flat portions provided at predetermined intervals in the circumferential direction and a plurality of recesses provided between these flat portions. And a through hole for allowing water to flow between the washing / dehydrating tub and the outer tub in each recess of the annular portion.