JPH0326065B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a single-tub type dehydrating washing machine.

Conventional Structure and Problems Conventionally, lint generated during washing or rinsing adheres to the laundry, resulting in poor finish and inconvenience, so various methods have been devised to remove the lint. Recently, using the pumping effect of a pulsator, the washing water between the tank and the water receiving tank is sucked in by the pulsator through a hole in a flange fixed to the bottom of the tank, and is then pumped into the washing tank through a discharge port with an open end at the top of the tank. It is known that the method of refluxing through a filter is widely used. This method reliably collects lint, reduces the amount of lint attached to the items to be washed, and makes the washing machine easier to use than before.

However, this method requires a single-tub type dehydrating washing machine with a double tank structure, the inner tank (tank) has many small holes, and washing water is also present between the inner and outer tubs, and is not suitable for large-sized washing machines. In order to increase the flow rate of circulating water in order to improve the lint removal performance, etc., it is necessary to increase the flow rate of circulating water by increasing the size of the blades on the back of the pulsator, etc., and increasing the pumping action of the pulsator. In other words, as the pumping action increases, the washing water between the tank and the water receiver is returned to the tank, so the water level between the tank and the water receiver drops significantly, and the pressure inside the air trap for water level detection changes. The pressure switch may malfunction.

Also, if the diameter of the small hole is small, relatively large lint (for example, pill or hair) will get stuck in the hole and will stick to the clothes again after washing, preventing the installed circulation filter. It doesn't work effectively.

For the above-mentioned reasons, circulation filters with excellent lint collecting performance necessarily have large diameter holes and an increased number of small holes.

However, as the diameter of the holes in the tank was increased or the number of holes was increased, new problems arose.

The first point is that if you increase the diameter of the small hole on the inner wall of the tank, hairpins, pins, toothpicks, wood screws, etc. will be drawn into the small hole, and during dehydration, they will come into contact with the water tank, causing abnormal noises and severe cases. Because the water tank was made of resin, it was sometimes cut into rings by the tip of a wood screw. The reason for this is that the hole diameter is large as mentioned above, and also because the washing water in the tank always passes through this small hole, exits to the water receiving tank, and is returned to the tank via the circulation filter. This is because hairpins and the like inevitably get stuck in these holes.
The second point is that in recent years, powdered soap has been used again due to the problem of contamination of lakes and rivers due to the phosphorus contained in synthetic detergents, but when powdered soap is used, metal splashes are generated on the outside of the tank. Another problem is that it adheres to the inside of the water tank and re-adheres to the laundry during washing, contaminating the clothes.

This problem is not a problem with so-called water-saving single-tank dehydrating washing machines in which there is no washing water between the tank and the water receiving tank during washing, but this type of washing machine has a method of detecting the water level and draining water. The structure of the current one-tub dehydrating washing machine has become complicated to solve problems such as passages and water seals, and new problems have arisen, so it cannot be said that sufficient reliability has been guaranteed. It has not become mainstream. Furthermore, the complicated structure naturally increases costs and increases the burden on the user.

Purpose of the Invention The present invention aims to improve a device for removing lint generated during washing in a single-tank dehydrating washing machine that rotates a pulsator during washing and rotates a tank during dehydration, and a double-tank structure inside the machine. This problem occurs when a so-called powdered soap detergent is used in a single-tank dehydrating washing machine, which has many small holes in the tank for dehydration, and the washing water is constantly communicated between the inner and outer tubs. It attempts to address various issues.

Structure of the Invention A first recess for accommodating the pulsator is provided at the bottom of the tank, and a second recess is provided concentrically at the center of the first recess, and the second bottom opening is The second recess is closed by a flange fixed to the tank, and a discharge port is provided on the outer peripheral wall of the second recess, and a waterway communicating with the discharge port is formed by a gutter-like waterway along the inner wall of the tank and a cover that covers this. A small hole provided in the tank forms a suction port into the washing water, while a suction port is provided on the outer circumferential wall of the first recess, and a waterway communicating with the suction port is connected to a gutter-like waterway along the inner wall of the tank. It is formed by a notch formed in a balancer case attached to the upper part of the tank to be fitted and a cover that covers the waterway, and the outlet of the waterway is connected to a filter that is detachably pressed onto the balancer case. .

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. It has many small holes 4 for dehydration.
5 is a tank cover A fixed to the inner surface of the tank 2
A circulating water discharge channel 7 is formed by the tank cover A5 and the balancer case 6, and a filter 8 for collecting lint is provided near the discharge port 9.
is attached removably. 10 is a circulating water discharge waterway inlet. On the other hand, 11 is a tank cover B attached to the inner bottom of the tank, 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 opened to the center of the pulsator 3, and 14 is a suction port on the tank side. A flange 15 is fixed to the tank 2, and is fixed to a hollow shaft 16, so that 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.

19 is a water tank for receiving washing water, and 20 is a cover for the tank. Reference numeral 21 denotes a board to which a dehydration/washing switching mechanism section 22 and a motor 23 are attached. 24 is a vibration isolator 25 which is a drain valve.

The figure shows an embodiment showing details of the present invention, and shows a recess 1 26 in which a pulsator is housed at the center bottom of the tank 2.
Further, a recess 227 is formed in the center of the recess 126 and has a circular rib on its outer edge, and its bottom opening is closed by the flange 15. A water channel 12 is formed through the tank cover B11 so that a discharge port 13 is formed on the outer peripheral wall of the recess 227, and a suction port 14 is formed on the inner surface of the tank 2. . 28 is a boss hole for attaching a cover, and the tank cover B11 is fixed to the tank 2 with screws (not shown) or the like.

Further, the tank cover 5 forms a water channel 12 on the suction side formed by the tank cover B11 and a water channel 7 on the discharge side at a position corresponding to the discharge port 13 thereof.

As described above, the washing water in the tank 2 is sucked through the suction port 14 at the bottom thereof, passes through the circulation channels 12 and 7, and finally returns to the tank 2 through the filter 8 attached to the balancer case 6.

Effects of the Invention As described above, according to the present invention, the circulating water flow type filter device has its suction portion and discharge portion on the inner surface of the tank, so that during washing, the washing water inside the tank and the washing water on the water receiving tank side are The forced movement of water is eliminated, and even if the diameter of the hole drilled on the inner surface of the tank is reduced, problems such as malfunction of the pressure switch due to fluctuations in the water level of the air trap and clogging of foreign objects such as hairpins are eliminated, and the problem of clogging of foreign objects such as hairpins is eliminated. Problems caused by metal soap compounds re-adhering to clothing can also be solved with a conventional and reliable type of structure and with almost no increase in cost.

Furthermore, since the suction port is inside the tank, even if the suction port hole is made large, even if foreign objects such as hairpins get into the washing tank, they will be collected in the filter through the circulation waterway, and they will not damage the clothes. Moreover, since these foreign objects do not pass through the drain, foreign objects may get stuck in the drain or the pump of a washing machine with a pump, making the washing machine unusable or requiring service personnel. There is no need to bother with your hands. Furthermore, since the only washing water that is being circulated is that inside the tank, even if the amount of circulating water is the same as before, the number of times the water in the tank is circulated increases, which actually improves the lint collection performance. be.

In addition, according to this configuration, since the circulation waterway is formed by the waterway on the inner surface of the tank and the tank cover, which are integrally molded from synthetic resin, water is present between the so-called water-saving type and the so-called water receiving tank during washing. It is possible to form a circulation type lint filter device even in the models that do not have a lint filter, and it is possible to improve the ease of use for consumers who desire these types.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing one embodiment of the present invention, and FIG. 2 is a perspective view of essential parts showing one embodiment of the present invention. 1... Body, 2... Tank, 7... Circulating water discharge channel, 9... Discharge port, 10... Circulating water discharge channel inlet, 14... Suction port, 15... Flange, 26
... recess, 27 ... recess.

Claims (1)

[Claims] 1. At the bottom of the tank, there is a first
A second recess is provided concentrically at the center bottom of the first recess, and the bottom opening of the second recess 2 is closed with a flange to be fixed to the tank. A discharge port is provided on the outer circumferential wall of the recess, and a waterway communicating with the discharge port is formed by a gutter-like waterway along the inner wall of the tank and a cover that covers this. A suction port is formed on the outer circumferential wall of the first recess, and a waterway communicating with the suction port is connected to a gutter-like waterway along the inner wall of the tank and a balancer attached to the top of the tank to be fitted into the waterway. A one-tub type dehydrating washing machine that is formed by a notch formed in a case and a cover that covers the water channel, and an outlet of the water channel is connected to a filter that is detachably inserted into the balancer case. 2. Claim 1, wherein the suction side waterway communicating with the second recess and its discharge port, and the position of the discharge waterway communicating with the first recess and its suction port are arranged at positions corresponding to each other by 180 degrees. Single-tank dehydrating washing machine.