JPS6310157Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a washing machine, and particularly to a pulsator that generates a water flow.

(b) Prior Art A pulsator (stirring blade) that does not damage clothing was proposed in Japanese Utility Model Publication No. 57-31010, and is shown in FIGS. 3 and 4. Here, washing tub 3
A recess 32 is formed in the inner bottom of the recess 1, and a pulsator 33 is disposed in the recess 32. A curved surface 34 is formed on the inner wall of the tank reaching the periphery of the recess. The pulsator 33 is shaped like a mortar so that the substrate 35 does not protrude from the periphery of the recess, and on the upper surface of this substrate 35 there are blades 36 that also do not protrude from the periphery of the recess.
stands out. The tops of the wing pieces 36 are curved so as to be continuous with the curved surface 34. A boss 37 is provided at the center of the substrate 35 so as not to protrude from the periphery of the recess.

In such a conventional example, when the pulsator 33 is rotated, an excessively strong swirling water flow is not generated, but a water flow that is strong in the center and extremely weak toward the outer periphery is generated. That is, the pulsator 33 works more effectively to push up the clothes from the bottom to the top than to generate a swirl by the centrifugal force from the inside to the outside, and pulls the clothes into the center of the tank, rubs them, and stirs them. As a result, the clothing has 36 wing pieces.
Because it is less likely to get caught in ..., it is less likely to be damaged, and because the fabric wraps around better, the washing effect is improved.

(c) Purpose of the invention Although this conventional example suppresses the swirling water flow, the force for making the clothes flow is weak, and the clothes do not flow smoothly at the time of startup when the clothes are stuck in the center of the tank. Therefore,
In some cases, the wing blades rubbed intensively against certain areas of clothing, causing damage.

This invention promotes the flow of clothes to prevent clothes from being damaged during startup, improves the washing effect by making it easier to turn clothes up and down, and prevents clothes from getting tangled and hard. purpose.

(d) Structure of the invention The invention forms a curved surface on the upper surface of the pulsator from the outer periphery toward the central column, and forms this curved surface and the curved surface of the tank inner wall with almost the same curvature,
In this washing machine, the curved surface of the pulsator is positioned lower than the periphery of the recess, the central column of the pulsator is positioned sufficiently high, and the pulsator has continuous blades projecting from the central column to the curved surface. .

(E) Function This pulsator has blades on the high central column that actively generate swirling water flow to promote the flow of clothing.
The second curved surface smoothly converts centrifugal force into upward force to push up clothes, allowing for good replacement of clothes.
Further, the clothes returning to the center are dispersed in all directions by the protruding central column to prevent the clothes from getting tangled.

(F) Embodiment In FIGS. 1 and 2, 1 is a two-tub washing machine in which a washing tub 2 and a dewatering tank 3 are arranged side by side. 4
5 is a large-diameter recess formed in the center of the inner bottom of the washing tub 2, and 5 is a large-diameter pulsator disposed within the recess 4. 6 is a motor that drives the pulsator 5 in reverse at a speed of 180rpm or less using a pulley and a belt; 7
8 is a drainage channel communicating with the recess 4, 8 is a drainage valve, 9
1 is a drainage hose, 10 is a centrifugal dewatering tank, and 11 is a driving motor thereof. Reference numeral 12 denotes a first curved surface formed at the lower corner of the washing tub 2 up to the periphery of the recess 4.
Reference numeral 13 denotes a central column that projects high from the center of the upper surface of the pulsator 5, and 14 denotes a second curved surface that is curved from the outer periphery toward the central column 13 with almost or exactly the same curvature as the first curved surface 12. It is. The second curved surface 14 is gradually recessed from the outer periphery downwardly below the periphery of the recess, forming drain holes 15 at the lowest part thereof, and rising from there to the high central pillar part 13. 16 are wing pieces that are continuously formed to protrude from the upper surface of the pulsator 5 from the central column part 13 to the second curved surface 14, and are arranged radially from the central column part 13, respectively. 17 are pump vanes formed on the lower surface of the pulsator 5, which are pumped up into the passage 18 and passed through the filter 19 when lint and the like are forcibly removed from the washing water.

Next, the operation of the embodiment will be explained. When the pulsator 5 is rotated, the blades 16 around the central column 13 generate a swirling water flow due to their centrifugal force.
Encourages clothing to flow in the same direction. The wing pieces 16 on the second curved surface 14 are connected from the second curved surface 14 to the first curved surface 1.
Create a water flow from bottom to top along 2. This water flow is smooth and strong because the curved surfaces are continuous with the same curvature. Clothes tend to flow in the tank due to the swirling water current, and at the same time are pushed up from the bottom to the top and moved from the inside to the outside to be replaced. and,
It returns to be sucked into the center of the tank, and is divided while being guided in all directions by the circumferential side of the central column portion 13. This way, the clothes won't get tangled in the center.
Also, the complex water flow inside and outside, up and down, washes evenly. In addition, since the clothes themselves are often turned over and dispersed throughout the tank, in fully automatic washing machines that spin water directly after washing, the load of clothes is evenly distributed. Therefore, vibration during dehydration is reduced, and occurrence of dehydration defects is reduced.

(g) Effects of the invention The present invention allows clothing to flow with a complicated water flow even during startup and steady state, and can reduce tangles. Therefore, it is possible to carry out washing effectively with less damage.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a washing machine according to the present invention, FIG. 2 is an enlarged sectional view of a main part, FIG. 3 is a sectional view of a conventional example, and FIG. 4 is a perspective view of a pulsator. 2...Washing tub, 4...Recess, 5...Pulsator, 12...First curved surface, 13...Central pillar portion, 1
4...second curved surface, 16...wing piece.

Claims (1)

[Scope of utility model registration request] A recess is formed in the bottom of the washing tub, a pulsator is arranged in this recess, and a first
In addition to forming a curved surface, a second curved surface having approximately the same curvature as the first curved surface is formed on the upper surface of the pulsator from the outer periphery toward the central column, and the second curved surface is made to be closer to the recess periphery. The central column is positioned low and the central column is positioned sufficiently higher than the periphery of the recess,
A washing machine characterized in that the pulsator has continuous radial blades projecting from the central column part to the second curved surface on the upper surface thereof.