JPH08883A - Fully automatic washing machine - Google Patents

Abstract

PURPOSE:To prevent foam from overflowing from the upper parts of an inner vessel and an outer vessel while clothing is stirred in a washing process. CONSTITUTION:An inner vessel 1, for which a pulsator 2 is arranged at a central bottom part so as to be freely rotated, is provided inside an outer vessel 7 and an upper cover 8 is arranged at the upper part of the outer vessel 7 so as to cover the inner vessel 1. Then, a discharge hose 15 is provided to be communication with the outside of the machine through a discharge valve 12 provided at the lower part of the outer vessel 7, and a pipe 14 to be communicated with a hole 13 provided at the upper part of the outer vessel 7 is linked to the discharge hose 15. A driving mechanism part 11 is provided to selectively drive the pulsator 2 or the inner vessel 1 with the driving force of a motor 10 and in the dehydrating process, the inner vessel 1 can be revolved in one direction by the driving mechanism part 1 but in the washing process, the revolution of the inner vessel 1 is controlled. Further, the outer vessel 7 is equipped with an opening part 24 at the upper part of the hole 13, the upper cover 8 corresponds to the revolving direction side of the inner vessel 1 at the opening part 24, and a projecting part 23 is formed toward the central direction of the inner vessel 1.

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 for sequentially controlling a series of washing, rinsing and dehydrating steps.

[0002]

2. Description of the Related Art Conventionally, a fully automatic washing machine of this type generally has a structure as shown in FIG. The configuration will be described below.

As shown in the figure, the inner tank 1 has a substantially cylindrical shape, a pulsator 2 is arranged at the center bottom, and a discharge part 3 and a substantially annular balancer 4 are fixedly attached to the upper part. Further, the inner wall is provided with a plurality of through holes 5. The pulsator 2 has a back blade 6 on the lower surface. The outer tank 7 is the inner tank 1
The upper cover 8 is fixed to the upper part so as to cover the balancer 4, and the substrate 9 is fixed to the outer bottom part to arrange the motor 10, the drive mechanism part 11, the drain valve 12, and the like. Also,
A hole 13 is provided in the upper portion of the outer tank 7, and a lower portion of a pipe 14 fitted in the hole 13 in a watertight manner is connected to a drain hose 15.

Here, when the water level becomes higher than the position of the hole 13, the hole 13 allows water to be discharged from the hole 13 to the outside of the machine through the pipe 14 and the drain hose 15, so that when the overflow rinse or the drain valve 12 fails, the hole 13 is removed. The water in the water supply is prevented from overflowing from the water supply valve 16 provided at the upper part of the tank 7. The outer edge portion of the substrate 9 is suspended from the upper corners of the outer frame 19 via the vibration isolator 17 and the suspension rod 18. Drain 20
Is provided at the bottom of the outer tub 7 and communicates with the outside of the machine by a drain hose 15 via a drain valve 12. 21 is a control device, 22
Is a setting means.

The drive mechanism section 11 transmits the rotational force of the motor 10 to the pulsator 2 in the washing process, and in the dehydration process, the unidirectional rotation of the inner tank 1 is selectively switched by a clutch (not shown). Make it communicate. At the same time, a brake mechanism (not shown) built in the drive mechanism 11 brakes the inner tub 1 during the washing process, releases the brake of the inner tub 1 during the dehydration process, and works in conjunction with the drain valve 12 to drain the drain valve. 12
Open up. Here, the braking force is such that the outer tub 7 does not violently hit the outer frame 17 due to the inertial force acting on the outer tub 7 due to the sudden braking of the rotation of the inner tub 1 in the dehydration process, and the aircraft is not moved. Is set to.

In the washing process, after putting clothes and detergent into the inner tub 1, water is automatically supplied to a predetermined water level and the motor 10 is rotated by the rotational force of the motor 10 in the washing process. The pulsator 2 is rotationally driven via the drive mechanism unit 11 to stir the clothes. Where the inner tank 1
Is rotatable only in one direction by a clutch (not shown) built in the drive mechanism section 11, but is braked by a brake mechanism section (not shown) also built in the drive mechanism section 11. Further, as the pulsator 2 rotates, the back blade 6 provided on the lower surface of the pulsator 2 sucks up the washing liquid in the lower part of the outer tub 7, discharges it from the discharge part 3 provided in the upper part of the inner tub 1, and drops it again on the water surface. As a result, while the washing liquid is being circulated, thread waste, foreign matter, etc. are removed and the dissolution of the detergent is promoted.

On the other hand, in the dehydration process, the clutch (not shown) incorporated in the drive mechanism section 11 is switched in conjunction with the opening operation of the drain valve 12, and at the same time, the braking is released and the inner tank 1 of the motor 10 is operated. It is rotationally driven in one direction via the drive mechanism section 11 by the rotational force. Therefore, the clothes in the inner tub 1 are pressed against the inner peripheral surface of the inner tub 1 by the centrifugal force due to the rotation to dehydrate the clothes. The dehydrated liquid moves from the inner tub 1 to the outer tub 7 through the hole 5, and is discharged from the drain port 20 at the bottom of the outer tub 7 to the drain valve 1.
It passes through the drainage hose 15 via 2 and is discharged to the outside of the machine.

[0008]

However, in such a conventional structure, the pulsator 2 is driven in the inner tank 1 in the washing process so that the water surface approximates to a parabola while the vortex motion is generated. It is low at the center and high near the inner wall, and since the washing liquid in the lower part of the outer tub 7 is sucked up between the inner tub 1 and the outer tub 7, the water level becomes lower than at the start of operation. As described above, since the water level difference intermittently occurs inside and outside the inner tub 1 each time the pulsator 2 is driven in reverse, bubbles generated on the water surface in the inner tub 1 pass through the holes 5 from the inner tub 1 and the inner tub with the washing liquid. 1 Spill out. For this reason, the drop between the discharge part 3 and the water surface becomes the smallest (H1 <H2 <H), especially during operation at the highest water level.
3) Since the amount of circulating water increases due to the pump-up action,
The water level difference between the inside and outside of the inner tank 1 increases, and the bubbles in the inner tank 1 easily flow out of the inner tank 1.

In addition, since the gap between the inner tank 1 and the outer tank 7 becomes smaller, the speed at which the bubbles accumulate becomes faster than the bubbles collapse, and the balancer 4 provided on the upper portion of the inner tank 1 and the upper cover. There was a problem that bubbles overflowed from the gap 8 and the dirt released from the clothes was redeposited on the upper portion of the inner tub 1 and the outer tub 7 and stained. Furthermore, bubbles overflowing from the upper part of the outer tub 7 fall out of the outer tub 7 and are placed in the lower part of the outer tub 7.
There is an unsafe problem that it adheres to the charging part such as and causes electric leakage.

The present invention solves the above problems, and an object of the present invention is to provide a fully automatic washing machine that prevents bubbles from overflowing in the upper part of the inner tub and the upper part of the outer tub during the washing process and can be safely used by the user. .

[0011]

In order to achieve the above object, the present invention covers an inner tank in which a pulsator is rotatably arranged at a central bottom portion, an outer tank containing the inner tank, and the inner tank. As described above, an upper cover disposed above the outer tank, a drain valve provided at a lower portion of the outer tank, a drain hose communicating with the outside of the machine through the drain valve, and the drain hose connected to the outer hose A pipe communicating with a hole provided in the upper part of the tank, a motor, and a drive mechanism section that selectively drives the pulsator or the inner tank by the driving force of the motor are provided. The inner tank can be rotated in one direction,
In the washing process, the rotation of the inner tank is braked, the outer tank is provided with an opening above the hole, and the upper cover corresponds to the rotation direction side of the inner tank in the opening, and The first problem solving means is that the protruding portion is formed toward the center of the tank.

Further, the projecting portion of the first problem-solving means has the upper end located above the upper end of the inner tank and the lower end located at a height near the hole, which is the second problem-solving means.

[0013]

According to the first means for solving the above problems, the present invention provides:
Bubbles generated in the inner tank during the agitation during the washing process flow to the outside of the inner tank and accumulate, and as the inner tank co-rotates in one direction with stirring, bubbles are formed between the inner tank and the outer tank. Although it rises while rotating, when the foam reaches near the height of the hole provided in the upper part of the outer tank, the foam is shaped so that it is located on the rotation direction side of the inner tank at the opening provided in the upper part of the hole. Since it is guided to the hole by the part and discharged from the pipe through the drain hose to the outside of the machine, it does not overflow at the upper part of the inner tank and the upper part of the outer tank.

Further, according to the second means for solving the problem, the amount of foam generated suddenly increases when the amount of detergent is added during stirring, or the water level is changed to a higher level during the stirring, so that the difference between the inner tank and the outer tank is increased. Even if the foam rises sharply, the upper end of the protrusion is located above the upper end of the inner tank and the lower end is located at a height near the hole, so that the bubble is guided by the protrusion to the hole, Since it is discharged to the outside of the machine through the drain hose, it will not overflow in the upper part of the inner tank and the upper part of the outer tank.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. The same components as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted.

As shown in the figure, the projecting portion 23 is formed integrally with the upper cover 8 and has a hole 13 formed in the upper portion of the outer tank 7.
In the opening 24 of the
Is closely fitted to the inner wall of the inner tub 1 and is located on the rotation direction side of the inner tub 1. The height of the protruding portion 23 from the inner wall of the outer tub 7 is from the lower part of the outer tub 7 to the upper part of the outer tub of the inner tub 1 and the outer tub of the outer tub 7. Considering the distance of the inner wall, H = 3 to 15 mm is secured.

The drive mechanism section 11 rotates the rotational force of the motor 10 in the forward direction and reverse direction (X direction and anti X direction in FIG. 2) of the pulsator 2 in the washing process, and rotates in one direction in the inner tank 1 in the dehydration process (see FIG. 2). A clutch (not shown) is used to selectively switch and transmit the X direction).

To explain the operation of the above construction, first, clothes are put into the inner tank 1, and the setting means 22 is used to input the water level, washing time, strength of water flow, number of rinses, dehydration time, etc. When started, the water supply valve 16 is opened according to a command from the control device 21, and water is supplied until a predetermined water level is reached. When the water level reaches a predetermined level, the water supply valve 16 is closed by the control device 21, the motor 10 is intermittently energized, the pulsator 2 is driven to reverse, and the clothes are stirred to start the washing process.

When stirring is started, as shown in FIG.
In the inside, a vortex motion (water flow) occurs at every reversal of the pulsator 2 (X direction, anti-X direction), so the water surface forms a free surface (dashed line 1a) that approximates a parabolic shape, and the water level is low at the center and near the inner wall. Get higher On the other hand, the back blade 6 sucks up the washing liquid in the lower part of the outer tub 7 every time it is reversed, and circulates again through the discharge part 3 into the inner tub 1 to capture thread wastes, foreign matters, etc. in the washing liquid, and to remove the detergent. Accelerate dissolution.

Here, the drop (H1,
(H2, H3) increases as the water level decreases, so the flow rate from the discharge part 3 is highest at the highest water level, and the amount of washing liquid sucked up from the lower part of the outer tub 7 is also high, so pump up at the highest water level. The effect of action is the best, and the circulation of the washing liquid is the best. The inner tank 1 is braked during the washing process, but the inner tank 1 is regenerated every time it is stirred.
Due to the inertial force generated inside, the inner tank 1 may co-rotate in the X direction, and the inner tank 1 rotates about 0 to 0.5 rotation for one inversion.

As the agitation continues, the agitation and circulation of the washing liquid cause the detergent to dissolve into the water to generate bubbles on the water surface in the inner tub 1. However, between the inner tub 1 and the outer tub 7, the pulsator 2 When the water level decreases with each inversion (broken line 1b) and the water level difference between the inner tank 1 and the outer tank 7 is intermittent, bubbles flow out of the inner tank 1 through the holes 5 to the outside of the inner tank 1, While rising between the outer wall of the inner tub 1 and the inner wall of the outer tub 7, the inner tub 1 co-rotates in the same rotation direction (X direction) as during dehydration, and bubbles also synchronize with this co-rotation in the X direction. Turn around.

Bubbles are raised to a height above the position of the hole 13 in the outer tank 7
As it rises while turning inside, the inner tank 1 at the opening 24
Guided by the projecting portion 23 closely fitted to the rotation direction side of the container, it moves to the hole 13 and is discharged from the drain hose 15 to the outside of the machine through the pipe 14, so that the upper cover 8 goes to the outside of the outer tub 7. It is possible to prevent the overflow, and to prevent an unsafe accident such as an electric leakage caused by bubbles that adhere to the charging portion of the motor 10 or the like through the outer wall of the outer tub 7.

Next, a second embodiment of the present invention will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in the drawing, the projecting portion 25 is formed integrally with the upper cover 8 and is closely fitted to the inner wall of the opening 24 at the opening 24 of the hole 13 on the rotational direction side of the inner tank 1. The outer tub 7 of the protruding portion 25 faces the center of the inner tub 1.
The height from the inner wall of the outer tub 7 from the lower part to the upper part of the outer tub 7 is taken into consideration in consideration of the distance between the outer wall of the inner tub 1 and the inner wall of the outer tub 7.
It is set to 15 mm.

Further, since the projecting portion 25 is integrally provided from the lower surface of the upper cover 8, it is provided from above the upper surface of the balancer 4, and the lower end (tip) of the projecting portion 25 is at a height near the hole 13. positioned. Therefore, the hole 13
To the upper end of the protrusion 25 (lower surface of the upper cover 8) A
Has a positional relationship (A> B) larger than the distance B from the hole 13 to the upper surface of the balancer 4.

The operation of the above structure will be described. In the washing process, the detergent dissolves in the water due to stirring and circulation of the washing liquid, and bubbles are generated on the water surface in the inner tub 1. The amount of bubbles generated may increase sharply when added, and at this time, the water level between the inner tank 1 and the outer tank 7 decreases with each inversion of the pulsator 2 (broken line 1b), and the inner tank 1 and the outer tank 7 If there is an intermittent water level difference between 7 and 7, bubbles will form in the inner tank 1.
It passes through the hole 5 from the inside, flows out to the outside of the inner tank 1, and suddenly rises between the outer wall of the inner tank 1 and the inner wall of the outer tank 7.
Rotates in the same rotation direction (X direction) as during dehydration, and the bubbles also rotate in the X direction in synchronization with this rotation.

The outer tank 7 has a height of bubbles above the position of the holes 13.
Even if it rapidly rises while moving inside, the lower end (tip) of the projection 25 formed on the rotational direction side of the inner tank 1 at the opening 24 is located at the height near the hole 13, and the upper end is at the upper cover. 8
Since it is integrally provided on the lower surface of the protrusion 2, the bubbles are not allowed to flow between the upper cover 8 and the upper surface of the balancer 4 before the protrusion 2
5 moves to the hole 13 and is discharged from the drain hose 15 to the outside of the machine through the pipe 14, so that the upper cover 8
It is possible to prevent overflow from the outside of the outer tub 7.

Further, even if the water level is changed and set to a higher value during the stirring and the stirring is continued, the bubbles rise by the increase in the water level. Similarly, the bubbles are formed on the upper cover 8 and the balancer 4 upper surface. Before it flows into the space, it is guided by the protrusion 25 and moves to the hole 13, and from the hole 13, the pipe 14, the drain hose 1
It is possible to prevent bubbles from overflowing in the upper part of the outer tub 7 because they are discharged to the outside of the machine through the 5 in order.

In each of the above embodiments, the protrusion 25 is formed integrally with the upper cover 8. However, the same effect can be obtained by extending the protrusion 25 into the opening 24 in the upper portion of the outer tank 7. Needless to say. However, most of the outer tank 7 and the upper cover 8 are integrally molded products made of synthetic resin, and the protrusion 25 formed on the lower surface of the upper cover 8 can be relatively easily manufactured by the upper and lower die. The mold can be easily maintained and the accuracy of the shape can be improved.

[0030]

As described above, according to the present invention, the inner tank in which the pulsator is rotatably disposed at the central bottom, the outer tank containing the inner tank, and the outer tank above the outer tank so as to cover the inner tank are provided. An arranged upper cover, a drain valve provided in the lower part of the outer tub, a drain hose communicating with the outside of the machine through the drain valve, and a hole provided in the upper part of the outer tub connected to the drain hose A pipe that communicates with the motor, a motor, and a drive mechanism section that selectively drives the pulsator or the inner tank by the driving force of the motor, and the drive mechanism section rotates the inner tank in one direction during the dehydration process. In the washing step, the rotation of the inner tank is dampened, the outer tank has an opening at the upper part of the hole, and the upper cover corresponds to the rotation direction side of the inner tank at the opening. Also, a protrusion is formed toward the center of the inner tank. Therefore, the bubbles flowing from the inside tank to the outside tank move in synchronization with the co-rotation in one direction with the stirring, and the bubbles accumulate and rise while rotating between the inner tank and the outer tank. However, when it reaches the height of the hole provided in the upper part of the outer tank, the foam is guided to the hole by the protruding part, discharged through the pipe and drain hose to the outside of the machine, and foam is generated in the upper part of the inner tank and the upper part of the outer tank. Can be prevented from overflowing.

Moreover, since the upper end of the protrusion is located above the upper end of the inner tank and the lower end is located at the height near the hole, even if the amount of detergent is added or the water level is changed during stirring, Similarly, it is possible to prevent bubbles from overflowing from the outer tub and adhering to the charging part in the lower part of the outer tub by letting the bubbles be guided by the projecting portion and discharged through the hole, the pipe and the drain hose.

[Brief description of drawings]

FIG. 1 is a sectional view of a fully automatic washing machine according to a first embodiment of the present invention.

FIG. 2 is a plan view of the fully automatic washing machine.

FIG. 3 is a sectional view of a fully automatic washing machine according to a second embodiment of the present invention.

FIG. 4 is a sectional view of a conventional fully automatic washing machine.

[Explanation of symbols]

 1 Inner Tank 2 Pulsator 7 Outer Tank 8 Top Cover 10 Motor 11 Drive Mechanism 12 Drain Valve 13 Hole 14 Pipe 15 Drain Hose 23 Projection 24 Opening

Claims (2)

[Claims] 1. An inner tank in which a pulsator is rotatably arranged at a central bottom portion, an outer tank which encloses the inner tank, an upper cover which is arranged above the outer tank so as to cover the inner tank, and A drain valve provided in the lower part of the outer tub, a drain hose communicating with the outside of the machine via the drain valve, a pipe connected to the drain hose and communicating with a hole provided in the upper part of the outer tub, and a motor. A drive mechanism section for selectively driving the pulsator or the inner tank by the driving force of the motor, wherein the drive mechanism section allows the inner tank to rotate in one direction during the dehydration process, and the inner section during the washing process. Try to brake the rotation of the tank,
The outer tub is provided with an opening at the upper part of the hole, and the upper cover corresponds to the rotation direction side of the inner tub in the opening and has a protruding portion formed toward the center of the inner tub. Fully automatic washing machine. 2. The fully automatic washing machine according to claim 1, wherein the projection has an upper end located above the upper end of the inner tub and a lower end located at a height near the hole.