JP3246089B2 - Fully automatic washing machine - Google Patents

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 washing by spraying a washing liquid onto clothes from an upper portion of a washing and dewatering tub.

[0002]

2. Description of the Related Art In recent years, protection of the global environment has become a very important issue. Resource saving is also an important theme among them, and in washing machines, water saving and detergent saving are strongly desired.

Conventionally, various methods have been proposed for saving water and detergent in a fully automatic washing machine. For example, as shown in JP-A-1-146584, a waterway forming cover is provided on a part of the inner wall of the washing tub to form a waterway between the washing tub and the lower blade of the pulsator. There is a type in which the washing liquid at the lower side of the washing tub is guided to the upper part of the washing tub through a water channel by the pump action, and the washing liquid is discharged from a plurality of discharge holes of an annular ring and poured onto the laundry. In this one,
Since the washing liquid is constantly poured into the laundry, it can be sufficiently washed even when the water level at the time of washing is a little low, so that water saving and detergent saving are possible, which is extremely useful.

[0004]

However, in such a conventional fully automatic washing machine, when the circulation amount of the washing liquid is increased in order to increase the water saving and the effect of the detergent, the flow of the washing liquid in the water receiving tub is increased. It becomes intense and foaming in the water receiving tank becomes intense. When the amount of foaming increases, the foam grows and rises between the water receiving tub and the washing and dewatering tub, and the phenomenon of overflowing from the upper part of the water receiving tub occurs. Could not. Even if it does not overflow from the upper part, if there are many bubbles generated between the water receiving tub and the washing tub, the load during dehydration due to the foam increases, the rinsing efficiency decreases due to the increase in the remaining amount of detergent, and the mold due to the adhesion of soap scum There is a problem that an adverse effect such as occurrence of a problem occurs.

An object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to prevent foam from growing between a water receiving tub and a washing and dewatering tub, thereby suppressing excess foaming, and eliminating the adverse effects of foaming.

[0006]

In order to achieve the above object, the present invention provides a water receiving tub, a washing and dewatering tub disposed in the water receiving tub, and a rotatable washing and dewatering tub mounted on the bottom of the washing and dewatering tub. The pulsator provided, a pump chamber formed on the outer periphery of the lower blade of the pulsator, a circulating water channel provided from the pump chamber to the upper portion of the washing and dewatering tub, and a washing and dewatering tub above the circulating water channel. A nozzle provided at an opening facing the inside, a diverging channel for branching a part of the circulating washing liquid is provided in the circulating channel, and a nozzle port of the diverging channel is provided between a water receiving tub and a washing and dewatering tub. Is a means to solve the problem.

[0007]

According to the present invention, a part of the washing liquid circulating in the washing and spin-drying tub is branched from the upper portion of the washing and spin-drying tub by the above-mentioned means for solving the problem, and the water is received from the nozzle opening in the upper portion of the washing and spin-drying tub. Spraying the washing liquid on the foam by flowing into the washing and dewatering tub prevents the growth of foam and suppresses excess foaming, prevents overflow of foam, and increases the amount of washing liquid circulated The evil can be eliminated.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, a water receiving tub 1 includes a washing and dewatering tub (hereinafter referred to as a washing tub) 3 having a pulsator 2 rotatably disposed at the bottom thereof. It is hung on the outer frame 5. A plurality of circulation water passage covers 6 are attached to the inner surface of the washing tub 3 to form a plurality of independent circulation water passages 7 with the washing tub 3. A lower blade 8 is integrally provided on the back surface of the pulsator 2, and a pump chamber 9 formed on the outer periphery of the lower blade 8 communicates with a plurality of circulation water channels 7. Openings 10 are formed by opening the upper parts of the plurality of circulation waterways 7 toward the inside of the washing tub 3, and each of the openings 10 is provided with a watering nozzle 11 (nozzle). The motor 12 is disposed below the water receiving tub 1, and drives the pulsator 2 at the time of washing and spins the washing tub 3 at the time of dehydration via the V-belt 13 and the speed reduction mechanism 14. The drain valve 15 controls drainage of the washing liquid, and is disposed below the water receiving tub 1. Reference numeral 16 denotes a water supply valve for controlling water supply. Reference numeral 17 denotes a cover provided on the upper side of the washing machine outer frame 5, and reference numeral 18 denotes a control device that controls the motor 12, the drain valve 15, the water supply valve 16, and the like. 1
Reference numeral 9 denotes a fluid balancer for reducing vibration of the washing tub 3 during dehydration, and is provided on the upper portion of the washing tub 3.

As shown in FIGS. 2 and 3, a branch water passage 20 is provided in the circulation water passage 7 so that a part of the washing liquid circulating in the circulation water passage 7 is branched. It faces between the water receiving tub 1 and the washing tub 3 to form a foam erasing nozzle 22.

The operation of the above construction will be described. First, as shown in FIG. 1, the laundry 23 is put into the washing tub 3 and a start switch (not shown) is pressed. The valve 16 is controlled to supply water to a predetermined water level, and the washing process starts. When the washing process is started, the motor 12 is controlled by the control device 18 such as right rotation / pause, left rotation / pause so as to form a predetermined washing water flow. The rotation of the controlled motor 12 is controlled by the V belt 13 and the speed reduction mechanism 1.
4 to the pulsator 2. Therefore,
The pulsator 2 and the lower blade 8 rotate in response to the rotation of the motor 12, and the laundry 23 and the washing liquid in the washing tub 3 are stirred, so that the laundry 23 is washed. On the other hand, the washing liquid between the lower blade 8 and the water receiving tub 1 is pushed outward by centrifugal force due to the rotation of the lower blade 8, passes through the circulation channel 7, and flows from the watering nozzle 11 into the washing tub 3. Is intermittently poured according to the rotation of the motor 12.

A new washing liquid is supplied to the trace of the washing liquid pushed out to the circulation channel 7 by the lower blade 8 from below the center of the lower blade 8. That is, the water receiving tub 1 and the washing tub 3
, The liquid level a between the water receiving tub 1 and the washing tub 3 becomes lower than the washing liquid level b in the washing tub 3. However, a hole for dehydration of the washing tub 3 (not shown)
In addition, since the washing liquid flows into the water receiving tank 1 from the gap between the washing tub 3 and the pulsator 2, the difference in the liquid level is balanced and constant at a certain value. Due to the fluctuation of the liquid level and the flow of the washing liquid, bubbles 24 are generated between the water receiving tub 1 and the washing tub 3.

Next, the operation in the vicinity of the bubble eliminating nozzle 22 will be described. First, the washing liquid pushed up by the rotation of the lower blade 8 of the pulsator 2 climbs the circulation channel 7 and is divided into the watering nozzle 11 and the branch channel 20.
The washing liquid directed to the watering nozzle 11 is sprayed into the washing tub 3. The washing liquid branched into the branch water channel 20 flows into the bubble erasing nozzle 22 and is sprayed from the nozzle port 21 between the water receiving tub 1 and the washing tub 3.
Pour over foam 24 between. Here, the size and shape of the branch water channel 20 and the nozzle port 21 are determined so that the amount of circulating water flowing through the branch water channel 20 is smaller than the amount of circulating water flowing toward the watering nozzle 11. The washing liquid sprinkled from the nozzle port 21 can prevent the growth of foam between the water receiving tub 1 and the washing tub 3, and can prevent the foam 24 from overflowing from the upper part of the water receiving tub 1.

In the above embodiment, the watering nozzle 11 is provided in the opening 10 facing the inside of the washing tub 4 above the circulation channel 7.
Although the configuration in which lint is provided has been described, it goes without saying that the configuration in which a filter for collecting lint and the like is provided in the opening 10 has the same effect of preventing the growth of bubbles.
Further, it is needless to say that a variation of the configuration in which a plurality of circulation channels are provided, some of which are provided with filters, and the others are provided with watering nozzles is the same as described above.

[0015]

As is apparent from the above embodiments, according to the present invention, the water receiving tub, the washing and dewatering tub arranged in the water receiving tub, and the bottom of the washing and dewatering tub are rotatable. The pulsator provided, a pump chamber formed on the outer periphery of the lower blade of the pulsator, a circulating water channel provided from the pump chamber to the upper portion of the washing and dewatering tub, and a washing and dewatering tub above the circulating water channel. With a nozzle provided in the opening facing the inside,
The circulating water channel is provided with a branch water channel for branching a part of the circulating washing liquid, and the nozzle port of the branch water channel faces between the water receiving tub and the washing and dewatering tub. By suppressing excess foaming, reducing the foam load during dewatering, improving rinsing efficiency, preventing the adhesion of soap scum, and eliminating the adverse effects caused by foaming, and eliminating the adverse effects associated with an increase in the amount of circulating water Further, the amount of circulating water can be further increased, and the cleaning rate can be further improved.

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view of a nozzle unit for foam erasing and watering of the fully automatic washing machine.

FIG. 3 is a front view of a nozzle for water-foaming and sprinkling of the fully automatic washing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water receiving tank 2 Pulsator 3 Washing and dewatering tank 7 Circulating water channel 8 Lower blade 9 Pump room 10 Opening 11 Sprinkling nozzle (nozzle) 20 Branch water channel 21 Nozzle port

Continuation of the front page (72) Inventor Hiroyuki Fujii 1006 Kazuma Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-60-142893 (JP, A) JP-A 63-22883 (JP) , U) (58) Field surveyed (Int. Cl. ⁷ , DB name) D06F 39/08 331 D06F 39/06

Claims (1)

(57) [Claims] 1. A water-receiving tub, a washing and dewatering tub disposed in the water-receiving tub, a pulsator rotatably disposed on the bottom of the washing and dewatering tub, and a lower blade of the pulsator. A pump chamber formed on the outer periphery, a circulating water channel provided from the pump chamber to an upper portion of the washing and dewatering tub, and a nozzle provided at an opening facing the inside of the washing and dewatering tub at the upper portion of the circulating water channel, A fully automatic washing machine in which a water channel is provided with a branch water channel for branching a part of the circulating washing liquid, and a nozzle opening of the branch water channel faces between a water receiving tub and a washing and dewatering tub.