JPH0361469B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a dehydrating and dehydrating washing machine that rotates a pulsator placed at the inner bottom of the washing and dehydrating tub during washing and rinsing, and rotates the washing and dehydrating tub during dehydration. More specifically, the present invention relates to an improvement in a structure in which liquid is circulated by a pump action accompanying the rotation of the pulsator, and is equipped with a filter that collects lint and the like in the middle of the circulation path.

Conventional Structures and Problems Various methods have been proposed to remove lint generated during washing or rinsing in order to prevent the lint from adhering to the laundry and impairing the finished product.

Recently, using the pump effect of a pulsator, the washing water between the washing and dehydrating tank and the water receiving tank is sucked in through the hole in the flange fixed to the bottom of the washing and dehydrating tank, and is passed through a filter placed at the top of the washing and dehydrating tank. Circulating filter structures have come to be widely adopted. With this method, lint is reliably collected, the amount of lint adhering to the laundry is reduced, and the usability of the washing machine is improved compared to the previous one.

However, this method is based on a single-tub type washing machine that has a double tank structure, has many small holes in the washing/dehydration tank, and has washing water between the two tanks. To increase the flow rate of circulating water in order to improve the lint removal performance of machines, etc.
It is necessary to increase the circulation flow rate by increasing the size of the blades on the back of the pulsator to strengthen the pumping action of the pulsator. In other words, when the pumping action increases, the water level between the washing and dehydrating tub and the water receiving tank decreases significantly because the washing water between the washing and dehydrating tank and the water receiving tank is circulated back into the washing and dehydrating tank. For example, if the pressure inside the air trap for water level detection changes,
The pressure switch may malfunction.

In addition, if the diameter of the small hole in the washing and dehydrating tank is small, relatively large pieces of lint, such as pill or hair, will get stuck in the small hole, and after the washing is finished, it will stick to the clothes again and cause trouble in the equipment. The problem is that the circulating filter that is used does not work effectively.

For the above reasons, circulation filters with excellent lint collecting performance necessarily have large diameter and increased number of small holes on the side wall of the washing/dehydration tank.

However, when the diameter of the small holes in the washing and dehydrating tank was increased or the number of holes was increased, the following new problems arose.

The first problem is that as the diameter of the small hole in the washing and dehydrating tank is increased, hairpins, pine nuts, toothpicks, wood screws, etc. will be drawn into the small hole, causing them to come into contact with the water tank during spin-drying, causing abnormalities. This can cause noise, or in severe cases, the water tank is made of resin and can be cut into rings by the tip of a wood screw. The reason for this is that the diameter of the hole is large as mentioned above, and also because the washing water always passes through this small hole to the water receiving tank, is sucked up by the pulsator, and is returned to the tank after passing through the circulation filter. This is because hairpins and the like inevitably get caught in this small hole.

The second problem is that in recent years, powdered soap has been used again due to the pollution of lakes, marshes, and rivers due to the phosphorus contained in synthetic detergents. The problem is that it adheres to the outside of the dewatering tank and the inside of the water receiving tank, and then re-adheres to the laundry during washing, contaminating the clothes.

This problem is not a problem in so-called water-saving single-tub washing machines where there is no washing water between the two tubs during washing, but this type of washing machine
In order to solve problems such as water level detection, drainage methods and routes, and water seals, the structure has become complicated, and new problems have arisen, and it cannot be said that sufficient reliability can be ensured. This has not become the mainstream structure of single-tub type washing machines. Furthermore, since the structure is complicated, it naturally increases costs and increases the burden on the user.

Purpose of the Invention The present invention solves the above-mentioned conventional problems, and aims to solve the problems caused by foreign objects such as hairpins, powdered soap, etc., without reducing the efficiency of lint collection.

Structure of the Invention In order to achieve the above object, the present invention provides a pulsator having pump blades on the back surface, a washing and dehydrating tank in which the pulsator is disposed at the inner bottom, and a water receiving tank containing the washing and dehydrating tank. and a circulating water discharge channel for guiding the water in the washing and dehydration tank by the pumping action of the pulsator to a discharge port facing a filter provided at the top of the washing and dehydration tank, and the water is discharged from the washing and dehydration tank from inside the washing and dehydration tank. An opening that communicates with the inside of the water receiving tank is provided at the bottom of the washing and dehydrating tank, and this opening is equipped with a one-way control valve that opens in only one direction to allow liquid to pass from the washing and dehydrating tank to the water receiving tank. The side wall of the washing and dehydrating tank is provided with a large number of small dehydrating holes that open above the water level during washing or rinsing, and the one-way control valve is configured to be open when draining water. be.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

In the figure, 1 is the main body, 2 is a dewatering/washing tank (hereinafter referred to as a tank), a pulsator 3 is arranged at the center inner bottom, and the side wall has many small holes 4 for dewatering above the water level line A. . Reference numeral 5 designates a tank cover fixed to the inner surface of the tank 2. A circulating water discharge channel 7 is formed by the tank cover 5, the balancer case 6, and the tank 2, and a lint collecting channel 7 is formed near the discharge port 9. A filter 8 is removably attached. 10 is an inlet of the circulating water discharge channel 7.

A tank cover 11 is attached to the inner bottom of the tank 2, and forms a circulating water suction channel 12 for supplying washing water to the above-mentioned circulating water discharge channel 7. 13 is a discharge port of the circulating water suction waterway 12 opened toward the center of the back side of the pulsator 3;
4 is a circulating water suction waterway 12 communicating with the inside of the tank 2
This is the suction port.

Reference numeral 15 denotes a flange fixed to the tank 2, which is fixed to a hollow shaft 16, and the tank 2 is rotated by the rotation of the shaft 16 during dewatering. 17
is a shaft for rotating the pulsator 3, and 18 is a blade provided on the back surface of the pulsator 3.

Reference numeral 19 denotes a water tank for receiving washing water, which accommodates the tank 2 so as to be rotatable for dewatering. 20 is the tank cover. 21 is a board, which is the dehydration/washing switching mechanism section 2;
2 and a motor 23 are attached. 24 is a vibration isolator, and 25 is a drain valve.

26 is the tank 2 inside the circulating water discharge channel 7.
The water receiving tank 19 and the tank 2 are communicated with the circulating water discharge channel 7 through a small hole bored in the side wall.

27 is a one-way control valve that opens and closes an opening 28 provided in the flange 15 that forms a part of the bottom wall of the tank 2 from the outside of the tank 2. Although it allows liquid to flow from the inside of the tank to the outside, it prevents flow in the opposite direction. As the one-way control valve 27, for example, a plate-shaped flexible valve body having one end fixed to the flange 15 and the other end swingable can be used, and various other valve bodies can be used.

In the above configuration, the operation will be explained next. The circulating water suction waterway 12 has an inlet 14 and an outlet 13.
is on the inner surface of the tank 2, so when washing or rinsing, basically only the washing water inside the tank 2 is circulated, and the small holes 4 for dehydration are not opened below the washing water level line A. The washing water inside the tank 2 and the washing water outside the tank 2 hardly ever flow, and the possibility that metal soap generated outside the tank 2 will re-adhere to clothing is greatly reduced.

By the way, if we consider the state of the washing water during water supply, washing (rinsing), and draining, we will find that when water is supplied, water is normally supplied inside the tank 2, so the amount of water supplied is equal to the amount of water discharged by the one-way control valve 27 on the back of the tank 2. If the amount is less, the water level will rise simultaneously both inside and outside the tank 2. On the other hand, when the amount of water supplied is larger, the water level inside the tank 2 is always higher and takes precedence, and the water level is detected by an air trap (not shown) installed between the water receiving tank 19 and the tank 2. For,
After the pressure switch (not shown) is activated, water flows from inside the tank 2 to the water receiving tank 19 side.
The metal stopper in the gap between the tank 2 and the tank 2 will not enter the tank 2.

Next, when thinking about washing (rinsing), the washing water is sucked in from the suction port 14 at the bottom of the tank 2 and discharged from the discharge port 9 and circulated, so the washing water is always circulated only within the tank 2. are doing. Here, while the pulsator 3 is rotating, the one-way control valve 27 is closed due to the pump effect.

When there are few clothes and the water level is high, the washing water becomes like a mortar and enters the gap between the water receiving tank 19 and the tank 2 through the dehydration small hole 4 at the top of the tank 2.
The water level in tank 2 may be lower. Further, even in normal washing, when water permeates into clothes during washing, the water level in the tank 2 similarly decreases. In such a case, the one-way control valve 27 at the bottom of the tank 2 is closed and the water level cannot be balanced. Therefore, as shown in the figure, communication is established between the inside of the circulating water discharge channel 7, the tank 2, and the water receiving tank 19, and a small hole 26 for adjusting the water level is provided.
This problem is solved by providing the following. In this case, there is a possibility that the metal soap that is attached to the water receiving tank 19 or the outside of the tank 2 may enter the tank 2, but in reality, the metal soap compounds drift closer to the water surface, so they are inhaled. The possibility is small, and even if it is inhaled, it will pass through the filter 8, so in practice, the metal soap compound will enter the tank 2 through the small hole 26 for adjusting the water level.
The problem of adhesion to clothing is almost eliminated.

In addition, basically, since there is almost no movement of water between the inside and outside of the tank 2, the water existing between the tank 2 and the water receiving tank 19 has a low concentration of detergent and metal The very possibility that a seizure will occur is decreasing.

Furthermore, when draining water, the one-way control valve 27
Water is drained through a small hole 26 for opening and water level adjustment, and no metal taps enter the tank 2.

In addition, although the formation position of the small hole for dehydration in this example was above the washing (rinsing) water level line,
If the water level can be changed in multiple stages or steplessly, the same effect as in this embodiment can be obtained by forming small holes for dewatering above the highest water level line.

Effects of the Invention As described above, according to the present invention, it is possible to solve the problem of metal soap re-adhering to laundry due to the use of powdered soap without using complicated water level detection and drainage methods. Reliability can be ensured.

[Brief explanation of drawings]

The figure is a longitudinal cross-sectional view of a washing machine for dehydration and dehydration in an embodiment of the present invention. 2...Tank (washing and dehydration tank), 3...Pulsator, 4...Small hole for dehydration, A...Water level line, 8...
Filter, 14...Suction port, 18...Blade, 1
9...Water tank, 27...One-way control valve.

Claims (1)

[Claims] 1. A pulsator having pump blades on the back side, a washing and dehydration tank with this pulsator arranged on the inner bottom, a water receiving tank containing the washing and dehydration tank, and a pumping action of the pulsator to generate water inside the washing and dehydration tank. Equipped with a circulating water discharge channel that leads the water to the discharge port facing the filter installed at the top of the washing and dehydrating tank.
An opening that communicates from the inside of the washing and dehydration tank to the water receiving tank is provided at the inner bottom of the washing and dehydration tank,
This opening is provided with a one-way control valve that opens only in one direction to allow liquid to pass from the washing/spinner tank to the water receiving tank. A washing machine for dehydration and dehydration, in which a large number of small holes for dehydration are opened at the top, and the one-way control valve is opened when draining water.