JPS6021024Y2 - washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a washing machine in which water in a washing tub is pumped up to the upper part of the washing tub and circulated by a circulation blade protruding from the back surface of an agitating blade.

Conventionally, in dehydrating and dehydrating washing machines, a plastic agitating blade rotated by a drive motor is provided at the bottom of a rotating tub, which is a washing tub and dehydrating tub, and has a large number of through holes arranged in the water receiving tank. By providing a large number of relatively long circulation blades radially projecting from the central boss part to the outer circumferential side on the back surface of the stirring blade, the circulation blades as the stirring blade rotates. The water in the water receiving tank is sucked through the through hole at the bottom of the rotating tank by the pump action, and is discharged toward the outer circumference, and the water is pumped to the upper part of the rotating tank via the water passage,
A structure has been proposed in which a filter is disposed at the upper end of the water passage so as to face into the rotating tank, and the filter captures lint contained in the circulating water.

However, according to the above configuration, since a large number of relatively long circulation blades are protruded from the back surface of the stirring blade, not only does the molded structure forming the bottom shape of the stirring blade become complicated, This requires a large amount of plastic as a molding material, which increases the overall cost, and also increases the weight of the stirring blades.

The present invention has been developed in view of the above circumstances, and its purpose is to provide a reinforcing rib that is located at a predetermined distance from the reinforcing rib only on the outer periphery of the back surface of the stirring blade, which has a reinforcing rib that protrudes downward on the outer periphery. A large number of circulation blades are protruded radially, and the circulation blades are arranged at a distance of 17 mm from the center line of the stirring blade to the radius of the stirring blade.
By configuring it to be located outside of position 3, it is possible to sufficiently obtain the effect of pumping and circulating the water in the washing tub to the upper part of the washing tub while making the circulation wing pieces small. Therefore, the molded structure for forming the stirring blade can be easily made and requires less molding material, and can be manufactured at low cost overall.The weight of the stirring blade does not increase significantly, and the size of the stirring blade can be reduced. To provide a washing machine that can reduce power consumption of a drive motor.

An embodiment of the present invention will be described below with reference to the drawings.

In the dehydrating/washing machine shown in Fig. 1, 1 is a water receiving tank which is elastically suspended in an outer box 2 via a hanging mechanism 3, and a drive motor 4 and its rotation are mounted on the outer bottom of this tank. A power transmission mechanism 6 that transmits power via a belt transmission mechanism 5 is provided.

Reference numeral 7 denotes a rotating tank serving as a washing tank and a dehydrating tank, which is rotatably arranged in the water receiving tank 1, and has a large number of deicing holes 8 formed in the circumferential side wall, and a balance ring 9 arranged inside the upper end. .

Further, the rotary tank 7 has a concave portion 10 formed at its bottom, and a water spout 11 at the side of the concave portion 10.

Reference numeral 12 denotes a support plate attached to the upper end of the dewatering shaft 13 of the power transmission mechanism 6, which closes the lower opening of the recessed portion 10 and supports the rotary tank 7.
A water intake port 14 is formed from a large number of small holes.

Reference numeral 15 denotes a stirring blade, which is attached to the upper end of the washing shaft of the power transmission mechanism 6 so as to cover the concave portion 10, as will be described later, and is surrounded by the lower surface of the stirring blade 15 and the inner surface of the concave portion 10. The space is defined as a pump chamber 16.

17 is a water pipe serving as a water passage, the lower end of which communicates with the pump chamber 16 via the water spout 11;
The injection port 18 at the upper end faces a filter support 20 having a filter 19 attached to the lower surface of the balance ring 9 from above.

Reference numeral 21 denotes a drain port formed at the inner bottom of the water receiving tank 1, which is connected to a drain hose 23 via a drain valve 22.

Now, the stirring blade 15 will be explained with reference to FIGS. 2 and 3.

That is, the stirring blade 15 is integrally molded from plastic, and has a boss part 24 projecting downward at the center thereof, and the boss part 24 is fitted onto the washing shaft and attached with a screw. I'm wearing it.

Reference numeral 25 denotes a reinforcing rib, which is integrally formed on the outer peripheral edge of the stirring blade 15 so as to protrude downward over the entire circumference.

Reference numeral 26 denotes a circulation blade, which has a predetermined gap size 1, for example 5, between the reinforcing rib 25 and the outer periphery of the back surface of the stirring blade 15.
A large number, for example, 12, are provided radially protruding from rrrIn.

In this case, the height H of the circulation blade 26 is, for example, 3Wr! The width dimension W is set to a small dimension of, for example, about 5 jobs.

Reference numeral 27 denotes a reinforcing rib that is integrally molded over the entire circumference at a portion located between the boss portion 24 and the circulation blade piece 26 on the back surface of the stirring blade 15, and this rib is directed downward, and its lower end It is positioned above the lower end of the wing piece 26.

Next, the operation of the above configuration will be explained.

When the stirring blade 15 is rotated during detergent washing and rinsing operations, the circulation blade 26 integrated therewith rotates, and the water in the rotating tank 7 and the water receiving tank 1 is transferred from the water intake port 14 to the pump chamber. 16
Here, it is urged by the circulation blades 26 and discharged from the water outlet 11, and then passes through the water pipe 18 and ascends to the filter support 20, where it is directed from the water inlet 18 into the filter 19. The water passes through the filter 19 and is returned to the rotating tank 7.

On the other hand, when water passes through the filter 19, lint in the water is captured by the filter 19.

As the water is returned to the rotating tank 7, a considerable amount of water flows out from the rotating tank 7 through the dewatering hole 8 and between the rotating tank 7 and the water receiving tank 1.

That is, there is a circulation channel in which the water in the rotating tank 7 is pumped up to the upper part of the rotating tank 7 through the dewatering hole 8 and the water inlet 14 by the pumping action of the circulation blades 26, and then returned to the rotating tank 7 after being pumped. The lint formed is captured by the filter 19 present in this circulation waterway.

On the other hand, during dehydration, the rotary tub 7 is rotated, and the water in the laundry in the rotary tub 7 is discharged from the dehydration hole 8 to the water receiving tank 1, and passes through the discharge port 21, the opened drain valve 22, and the drain hose 23. ejected from the aircraft.

Figure 4 shows the data of the inventor's experiment showing changes in the amount of circulating water and input power when the protruding position of the circulation vane 26 is changed. The distance S (ratio to the radius r of the stirring blade 15) from the center line to the outer peripheral end surface of the circulation blade 26 is taken and shown on the vertical axis, and the amount of water circulated by the circulation blade 26 C (1 /mim
) and the input power P (W) to the drive motor 4.

Further, L□ indicates a circulating water amount characteristic curve, and h indicates an input power characteristic curve.

In this case, the width dimension W of the circulation wing piece 26 is set to be constant at 5WrIIt, but the height dimension H varies depending on the distance S.

As is clear from this experimental result, when the distance S of the circulation blades 26 is smaller than 1/3 r (closer to the center line side of the stirring blade 15), there is almost no circulating water amount C;
When the distance becomes larger than (approaching the outer circumferential side of the stirring blade 15), the amount of circulating water C increases rapidly, and when the distance is 575 Go, the amount of circulating water C reaches its peak value, and then rapidly decreases.

Then, the gap size 1 when this distance So is 5 m,
The height dimension H is 3 towers, and the circulating water volume C is approximately 20 (1/mi
m), and the input power P was 250 (W).

Based on this experimental result, we estimate that when the distance S of the circulation blade 26 is 1/3 r or less, the circumferential speed of the circulation blade 26 is small and the pumping action is sufficient to obtain the amount of circulating water. If the distance S exceeds 1/3 r, that is, the closer the stirring blade 15 is to the outer periphery, the higher the circumferential speed will be, and the stronger the pump action will be obtained, the more the circulating water amount C will increase rapidly. Conceivable.

Then, when the protruding position of the circulation wing 26 is at a distance So, that is, when the gap size 1 between the circulation wing 26 and the reinforcing rib 25 is 5 m, the circulating water amount C reaches a peak value and then rapidly decreases. This means that the water discharged to the outer circumferential side of the stirring blade 15 by the circulation blade 26 is blocked by the reinforcing rib 25, so in other words, there is a sufficient water flow path between the circulation blade 26 and the reinforcing rib 25. This is thought to be due to the fact that it is no longer formed.

In this embodiment, the circulation blade 26 is provided protrudingly at the position of this distance So, and the distance obtained at this time is about 20 (i
/mim) is the same as the conventional one, and the input power 250 (W) is 10 (W) lower than the conventional one.
The results show that the amount is small.

As described above, according to this embodiment, 12 circulating blade pieces 26 are provided radially protruding from the reinforcing rib 25 and a predetermined gap size 1, for example, 5 mm, only on the outer circumferential portion of the back surface of the stirring blade 15. Therefore, even if the circulation vane 26 is small in size, the pump action will not be reduced compared to the conventional one, and sufficient circulating water flow can be obtained. Since it is extremely small in comparison, the molded structure for molding the stirring blade 15 is significantly simpler than before, and the amount of plastic used as the molding material is also small, so it can be manufactured at low cost overall. In addition, since the increase in the amount of plastic caused by the circulation blades 26 is small, the weight of the stirring blades 15 does not increase significantly, and as mentioned above, the circulation blades 26 are extremely small compared to the conventional one. Therefore, the resistance caused by water can be minimized, and the input power to the drive motor 4 can be reduced, and power consumption can also be reduced.

In the above embodiments, the present invention was applied to a washing machine with both dehydration and dehydration functions, but the present invention is not limited to this, and may be applied to a two-tank type washing machine as long as it has a configuration that obtains the amount of circulating water, without departing from the gist. It can be implemented with various changes.

As explained above, the present invention can sufficiently obtain the action of pumping and circulating the water in the washing tub to the upper part of the washing tub while reducing the size of the circulation vane, and therefore, the stirring blade can be formed. The molded structure can be easily formed and requires less molding material, and can be manufactured at low cost overall.The weight of the stirring blade does not increase significantly, and furthermore, the power consumption of the driving motor of the stirring blade can be reduced. It is possible to provide a washing machine that can be used for various purposes.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a vertical sectional side view of a washing machine with dehydrating function, Fig. 2 is an enlarged longitudinal sectional view of a stirring blade, and Fig. 3 is an enlarged longitudinal sectional view of a stirring blade.
The figure is an enlarged bottom view of half of the stirring blade, and FIG. 4 is a characteristic curve diagram of input power versus circulating water amount for explaining the operation. In the drawing, 4 is a drive motor, 7 is a rotating tub (washing tub), 15
16 is a stirring blade, 16 is a pump chamber, 17 is a water pipe (water passage), 25 is a reinforcing rib, and 26 is a circulation blade piece.

Claims (1)

[Scope of utility model registration request] An agitating blade that is disposed at the bottom of the washing tub and has a reinforcing rib that protrudes downward from the outer periphery; and a radial protrusion with a predetermined gap between the reinforcing rib and the reinforcing rib only on the outer periphery side of the back surface of the agitating blade. A plurality of circulation blades are provided to perform a pumping action, and a water passageway pumps water in the washing tub to an upper part of the washing tub and circulates the water according to the pumping action of the circulation wings. A washing machine characterized in that the circulation blade is set to be located outside of a position that is 1/3 of the radius of the stirring blade from the center line of the stirring blade.