JPH0857184A - Washing device for fully automatic washing machine - Google Patents

Abstract

PURPOSE: To decrease damage to clothes and, at the same time, improve washing efficiency, by using a pumping action by the rear vane of an agitator fin, and by washing in such a manner that washing water obtained by the pumping action is jetted onto the laundry from vents made in the bottom of a washing tube and its side wall. CONSTITUTION: During washing time and rinsing time, an agitator fin 7 at the bottom of a washing tub 3 performs an agitating operation, rotates normally and reversely, to wash clothes 43 while moving them. At this time, be the rotation of the rear vane 7a on the underside of the agitator fin 7, washing water and lint in the washing tub 3 are drawn via the hole 42a of a flange 42 supporting the washing tub 3, and they are caused to pass along a flow passage 41 provided at the bottom of the washing tub 3 and are discharged into the washing tub 3 from a plurality of small vents 40a. The stream of discharged water is jetted onto the laundry 43, thereby removing the soils of the clothes 43 and also pushing the clothes 43 up. Thus, damage to the clothes 43 and load on the agitator fin 7 can be decreased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully automatic washing machine,
In particular, the present invention relates to a washing machine with little cloth damage and a high cleaning effect.

[0002]

2. Description of the Related Art Conventionally, as an application of a circulation system by rotating a stirring blade, there is a lint filter device for collecting the cloth waste discharged from clothes. In recent years, this circulating water is returned from the upper surface of the inertia ring to the washing tub without the lint filter.
A method has been commercialized in which water is sprayed from the upper surface of the clothes in the washing tub to improve the cleaning efficiency. However, this method only sprays the washing water on the upper surface of the clothes during washing. However, there is a drawback in that the cleaning effect cannot be obtained with the force of water. Moreover, it was not possible to reduce the damage to the cloth during washing.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to reduce stains on clothes and to effectively remove stains on clothes.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a back blade provided on a stirring blade causes a pump action during washing and stirring to wash the washing water between the washing tub and the outer frame of the washing tub bottom or the washing tub. It is spouted from a plurality of discharge holes provided on the side wall and is applied to laundry clothes to remove dirt from the clothes.

[0005]

By the pumping action of the back blades of the stirring blade, the water flow is applied to the clothes through the discharge ports provided on the bottom and side walls of the washing tub. As a result, cleaning efficiency can be improved and damage to the cloth can be reduced.

[0006]

The present invention will be described with reference to the drawings. FIG.
Is a vertical cross-sectional view of a fully automatic washing machine employing the present invention,
The operation will be sequentially described. In the fully-automatic washing machine, the outer tub 2 is supported by the four hanging rods 5 inside the outer frame 1, and the corner plates 21 at the four corners of the upper part of the outer frame 1. Hanging rod 5
There is a push spring 4 interposed therebetween to absorb vibration during washing and dehydration. In the case of washing, the lid 18 is opened, the clothes are put into the washing tub 3, and the water is supplied in accordance with the command from the control unit 19, and then the motor 20 is rotated in the forward and reverse directions. The motor 20 uses the V belt 16
The rotation is transmitted from the motor pulley 17 to the clutch pulley 15 in the clutch 14 via the. The rotational force thus transmitted causes the stirring blade 7 for moving the clothes located in the center of the washing tub 3 to rotate for washing by operating the clutch 14 during washing.

During drainage, the motor 2 is instructed by the controller 19
0 is stopped, the drain valve 12 is opened, and the washing or rinsing liquid in the washing tub 3 is discharged from the drain hose 13 to the outside of the machine. After the drainage, the dehydration process automatically proceeds, but the dehydration process causes the outer tub 2 to shake greatly depending on the condition of the clothes.
To prevent the outer tank from swinging due to dehydration.

In the dehydration, the rotation of the motor 20 is transmitted to the clutch 14 via the V belt 16 as in the case of washing, the washing tub 3 is rotated at a high speed by the control of the clutch 14, and the centrifugal force is applied to the clothes. The water inside is dehydrated to the outer tub 2 through the dehydration hole 3a provided in the washing machine 3. The dehydrated washing water is drained out of the machine from the drain valve 12 through the drain hose 13.

FIG. 2 is a detailed explanatory diagram of the control unit 19 described with reference to FIG. The microcomputer 34 includes a timer 33, a central processing unit (CPU) 32, a memory 31, and I / O ports 29 and 30. These processes of the microcomputer 34 are for exchanging and controlling the CPU 32, the timer 33, and the memory 31 via a data bus. As is well known, these operation controls are basically made up of a timer 33, a CPU 32, a memory 31, an input port 29, and an output port 30. The CPU issues a control command at the time of washing, but the CPU does not , Arithmetic unit,
It has a control unit and is the center of the system. CP
U is basically an instruction fetch / decode / execution command, but specifically, arithmetic and logical operations, read / write control of the contents of a specified address of the memory, input / output to the specified address of the input / output device. It controls output and program flow.

The memory 31 stores programs and data, and has both read and write functions.
And a ROM that has only a read function. The RAM is used as a work area for storing data and forming programs, and the ROM stores the fixed program and fixed data and is always the same. It is used when processing.

The input port 29 and the output port 30 are CP
It is a circuit that acts as an intermediary when data is transferred between the U and the input device and the output device, and is generally called an I / O port.

An electric command from a fully automatic washing machine is input to the input side of the I / O port. This is mainly the power switch 23, the water level sensor 22, the lid switch 24, the program selection switch 25, the start / stop switch 2.
6, the cloth amount sensor 35 and the like are connected. A washing motor 20, a water supply valve 10, a drain valve 12, a clutch solenoid 27, an alarm 28, a progress indicator 36 of a display panel unit, and the like are connected to the output side, and the I / O is instructed by the CPU.
The washing machine is controlled by the intervention of the port to perform a series of washing operations. Therefore, the washing machine is controlled in the same manner as the mechanical control including the cam switch.

The control of the fully automatic washing machine under microcomputer control has been described above with reference to FIG. 2. The operation under control of these microcomputers will be described more specifically with reference to the process block diagram of FIG. In the washing machine, the power switch 23 is pressed, the program selection switch 25 is used to select, for example, a standard laundry course, and the start / stop switch 26 is used.
By pressing, water is supplied from the water supply hose 11 into the washing tub 3 through the water supply valve 10. Washing water is a specified amount,
Based on the information from the water level sensor 22, the CPU 32 determines that the laundry has entered the washing tub 3, and starts the prescribed washing operation. After the washing operation is completed for a specified time, the drain valve 12 drains the drain hose 13 to the outside of the machine. After that, the water in the clothes is dehydrated by the centrifugal force through the dehydration hole 3a, and then water for rinsing is supplied to perform rinsing. Such a series of washing operations is performed by the microcomputer for washing.

Next, referring to FIG. 4, a method of collecting the cloth dust that comes out of the clothes at the time of washing and rinsing will be described. First, FIG. 4 is a partial cross-sectional view of a fully automatic washing machine, the structure of which is the same as that described above, but the structure of a lint filter that collects the cloth debris discharged from clothes when washing or rinsing will be sequentially described. .

At the time of washing and rinsing, the stirring blade 7 located at the center of the washing tub 3 performs forward and reverse stirring operation to move and wash clothes. Due to mechanical force, mechanical force due to rubbing between cloths, and the like, cloth scraps and the like are discharged from clothes.
Between the outer tub 2 and the outer tub 2, but the back blade 7a on the back surface of the stirring blade 7 sucks the cloth debris together with the washing water 39 from the hole 42a of the flange 42 supporting the washing tub 3 to wash the tub. In the circulation path 37, which is pushed up from the circulation passage 37 provided in the side wall to the inertia ring 6 provided at the upper part of the washing tub 3, passes through the filter 38 provided at the outlet thereof, and returns to the inside of the washing tub 3, During medium and rinsing, the washing and rinsing water in the washing tub 3 is constantly circulated.

The lint filter 38 has a mesh that does not allow cloth dust to pass through. The lint filter 38 collects cloth dust and the like with a cloth dust collecting mechanism of a general automatic washing machine. .

That is, at the time of washing and rinsing, the stirring blade 7
The back blade 7 provided on the back surface of the stirring blade 7 by the rotation of the
By a, the pump action is caused to raise the washing water and the rinsing water to a portion higher than the washing water surface, and the lint filter 38 provided at the outlet thereof collects the cloth waste and the like.

Next, the relationship between the circulation flow rate at the time of washing by the back blade 7a of the stirring blade 7 and at the time of rinsing will be described with reference to FIG. Lifting height H (mm) from the washing and rinsing water surface to the outlet of the lint filter 38, and the discharge amount (l / min) from the lint filter port by the back blade 7a when the stirring blade 7 rotates.
The relationship is 50-60 l / mi when the lifting height is about 10 mm.
A circulation flow rate of n is obtained. Also, the lifting height H is 100 mm
Since a circulation flow rate of about 30 l / min can be obtained, if the stirring time (washing time) is 10 minutes, washing and rinsing water will pass through the lint filter 38 2 to 10 times if the washing water is 50 l. The lint filter device having a structure in which the cloth dust contained therein is collected is commercialized as a general lint filter device.

The debris collected on the lint filter 38 is removed by the rotation of the washing tub 3 during dewatering.
The water contained in the cloth waste inside is also dehydrated at the same time as the water contained in the clothes. After the dehydration is finished, the detachable lint filter 38 is taken out from the inertia ring 6 to remove the cloth waste in the lint filter 38.

As described above, during washing, although the lift of the back blade 7a of the stirring blade 7 is changed by the rotation of the stirring blade 7, the discharge amount of about 10 to 60 l / min is obtained from the experimental result of FIG. It is what is done.

The present invention utilizes the circulation flow rate by the stirring blade 7 described above, and will be described below with reference to FIG.

FIG. 6 is a partial sectional view for explaining the present invention. When washing or rinsing, the back blade 7a of the stirring blade 7
As a result, the water flowing out from the dehydration hole 3a of the washing tub 3 to the outer tub 2 is sucked up by the back blade 7a of the stirring blade 7 from the flange hole 42a of the flange 42, and the water flow passage 41 provided at the bottom of the washing tub 3 is discharged. Thus, the gas is discharged from the plurality of small discharge ports 40a. The plurality of discharge ports 40a are located all around the bottom surface of the washing tub 3a, and the rotation of the stirring blade 7 and the pumping action of the back blade 7a of the stirring blade 7 cause the discharge port 40a to pass through a lint filter. Discharge with the same or higher effect than the amount of circulating water. As for the discharge amount from the discharge port 40a, if the diameter of the discharge port 40a is 5 mm and the number thereof is 2 to 10 or more, the flow velocity V from the discharge port 40a is about 0.1 to 4 m / sec. Gush out. Therefore, the jetted water flow hits the surface of the laundry clothes 43 in the washing tub 3, and due to the effect of removing dirt on the laundry clothes and the strong water flow from the discharge port 40a, the small amount of laundry clothes 43 is washed. Since it has the effect of pushing it up, the force that hits the stirring blade 7 is reduced, and the damage to the clothes 43 due to the mechanical force of the stirring blade 7 is also greatly reduced. Further, since the clothes impinging on the stirring blade 7 are reduced, the load on the motor 20 is reduced, and the input and the like can be suppressed. FIG.
It is a partial expanded sectional view for detailed explanations of FIG. At the time of washing and stirring during rinsing, the water between the outer tub 2 and the washing tub 3 is sucked up by the back blade 7a from the water absorbing hole 42a of the flange 42 supporting the washing tub 3, and the bottom of the washing tub 3 is absorbed. From a large number of discharge ports 40a provided in the portion, a strong water flow spouts into the washing tub 3. At this time, there is laundry clothes 43 in the washing tub 3, and the water ejected from the discharge port 40a is
Since the laundry clothes 43 are brought into contact with the surface of the clothes and the laundry clothes 43 are lifted up, the mechanical force of the stirring blade 7 on the clothes 43 can be reduced.

With this structure, when washing,
The clothes 43 can be efficiently washed and damage to the clothes can be prevented. Such a configuration has been described with reference to the bottom portion of the washing tub 3 shown in FIG.
If it is applied to the side wall of the washing clothes 43, the washing effect by jetting is obtained from both the bottom portion and the side portion, and at the same time, as shown in FIG.
The same effect can be obtained by combining with the lint filter circulation described based on.

[0024]

According to the present invention, the back blade 7a of the stirring blade 7 is
By the pump action by the, the circulating flow rate obtained by the pump action is ejected from the plurality of discharge ports 40a to the bottom surface portion and the side wall portion of the washing tub 3 and applied to the clothes 43, thereby efficiently removing the dirt attached to the clothes. it can.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a fully automatic washing machine.

FIG. 2 is a block diagram of microcomputer control.

FIG. 3 is a block diagram of a fully automatic washing course.

FIG. 4 is a partial vertical sectional view of the washing machine.

FIG. 5 is a characteristic diagram of head height and circulation flow rate.

FIG. 6 is a partial cross-sectional view of the washing machine.

FIG. 7 is a partial cross-sectional view of the washing machine.

[Explanation of symbols]

3 ... washing tub, 7 ... stirring blade, 7a ... back blade, 40a ... discharge port, 43 ... clothing.

Claims (1)

[Claims] 1. In a washing machine, by applying a pumping action by a back blade of a stirring blade for moving and washing clothes, the washing water obtained by the pumping action is spouted from a plurality of discharge ports provided at the bottom and side walls of a washing tub. A washing device for a fully-automatic washing machine, characterized by being applied to laundry and washing.