JPH0228357B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a washing machine that performs washing in a washing tub having rotary blades at the center of the bottom.

Conventionally, for example, in a washing tub that has rotary blades in the center of the bottom that doubles as a dehydration tank, the rotary blades rotate at a high speed of about 700 revolutions per minute during washing to generate a rotating water flow, but because the rotary blades are located at the center of the washing tub, Although the laundry rotates horizontally, it does not move much vertically, and the same areas are rubbed against the high-speed rotating blades, causing damage to the fabric and uneven washing.

The present invention has been made in view of the above problems, and an object thereof is to provide a washing machine that can reduce cloth damage caused by the rotary blade and also reduce uneven washing.

That is, in the present invention, the rotational speed of the rotary blade is made relatively low, for example, 250 revolutions per minute or less, and the diameter thereof is increased to weaken the friction between the rotary blade and the laundry, thereby reducing fabric damage. The rotation of the laundry is promoted by pushing the laundry around with rotary blades, and the washing tub is provided with a plurality of vertical buffs from the bottom of its side wall so that the rotating laundry is scrubbed with these buffles. By raising the water flow discharged by the pump action of the back blade and directing it towards the center, it promotes the flipping of the laundry up and down and inside and out, allowing it to be evenly scrubbed and scrubbed, reducing uneven washing. It was designed to do so.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below based on figures showing one embodiment. Reference numeral 1 denotes a washing tank which also serves as a dehydration tank, and its side wall is provided with a large number of water holes 2 for dehydration, and a balance ring 3 filled with liquid is attached to its upper edge, and a rotary blade is installed in the center of its bottom. 4 is provided. The washing tub 1 is provided inside the outer tub 5.
is suspended from the top of the machine frame (not shown) in a vibration-proof manner. A dewatering motor 6 for rotating the washing tub 1 and a washing motor 7 for rotating the rotary blades 4 are attached to the bottom of the outer tub 5.

The rotary blade 4 has a large diameter and extends close to the side wall of the washing tub 1, and a plurality of blades 8 are provided radially. The tip portion 9 of this blade 8 is highly raised. A low-height auxiliary blade 10 is protruded between the blades 8.
This rotary blade 4 is rotated by a washing motor 7 at a relatively low speed of 250 revolutions per minute or less. Further, back blades 11 are provided radially on the back side of the rotary blade 4,
When the rotary blade 4 rotates, the pump action of the back blade 11 causes the liquid between the washing tub 1 and the outer tub 5 (eventually, the liquid in the washing tub 1
water flow hole 12 provided at the bottom of the washing tub.
The suction liquid is discharged into the washing tub from between the periphery of the rotary blade and the washing tub wall. Washing tub 1
On the side wall of the rotary blade, a plurality of vertical buffles 13 close to the rotor blade periphery are bulged inward from the bottom to the middle, and the liquid discharged by the back blade 11 rises between the buffles 13. After that, it heads toward the center of the washing tub. Arrows in Figure 1 indicate the flow of liquid.

In such a structure, when laundry is loaded and the rotary blades 4 are rotated, the rotary blades rotate relatively slowly and the diameter of the rotary blades is large, so the friction between the laundry and the rotary blades is weaker than before, and there is less damage to the fabric. At the same time, the laundry becomes more frequently rotated in the washing tub by the rotary blades. Therefore, the laundry is scrubbed and washed by the vertical scrubber 13. In addition, since the water flow discharged by the back blade 11 rises as described above and then heads towards the center, the water flow allows the laundry to be easily exchanged from top to bottom, inside and outside, and is evenly rubbed against the buttful 13 and washed.

3 and 4 show another embodiment of the rotary blade 4, in which grooves 14 are provided in place of the auxiliary blades 10 in FIG. This makes it easier for items to rotate inside the washing tub along with the rotary blades.

As described above, according to the present invention, the rotation speed of the rotor blades is lowered to suppress fabric damage caused by rubbing the laundry against the rotor blades, and the diameter of the rotor blades is increased to speed up the rotation of the laundry. The reduction in cleaning power due to the reduction in friction with the rotary blades is compensated for by the scrubbing caused by the washing being rotated and rubbing vertically, and by the pumping action of the back blades.
The discharged water flow rises vertically and then moves toward the center, which promotes the alternation of the top and bottom of the laundry and allows it to be washed evenly. In the above embodiment, the peripheral wall of the washing tub has a large number of dehydration holes 2, but the washing tub may have no dehydration holes. In this case, a hole may be provided in the center of the rotor and the liquid may be sucked through the hole.

[Brief explanation of drawings]

The drawings illustrate the present invention; FIG. 1 is an internal vertical sectional view of a washing machine, FIG. 2 is a plan view of a rotor blade, FIGS. 3 and 4 show other embodiments of the rotor blade, and FIG. is a plan view, and FIG. 4 is a sectional view taken along the line of FIG. 3. 1... Washing tub, 4... Rotating blade, 11... Back blade, 13... Vertical full.

Claims (1)

[Claims] 1. A rotary blade with a large diameter is installed at the center of the bottom of the washing tub, and the circumferential edge extends to the vicinity of the side wall of the tub, and the liquid in the washing tub is suctioned from between the circumferential edge of the rotary blade and the wall of the washing tub. A back blade is provided for discharging the liquid into the washing tub, and a plurality of vertical buffs are protruded from the bottom of the washing tub side wall in close proximity to the peripheral edge of the rotary blade to raise the discharged liquid, and the rotary blade is compared. A washing machine that rotates at a slow speed.