JP3216337B2 - 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 washing machine for performing washing by spraying a washing liquid onto laundry from an upper portion of a washing 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.

Various methods have been proposed for water saving and detergent. 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 and dewatering tub to form a waterway between the washing and dewatering tub, and the rotation of the stirring blade is performed. By the pump action of the blades provided at the lower part of the stirring blade, the washing water is guided from the bottom of the washing and dewatering tub through the water channel to the upper part of the washing and dewatering tub, and is sprinkled on the upper part of the laundry (clothing), A washing method has been proposed in which the washing liquid is supplied to the laundry even when the laundry is exposed on the water surface.

[0004]

However, in the method described in Japanese Patent Application Laid-Open No. 1-146584, when the laundry is supplied in such a manner that the laundry is intentionally exposed from the water surface for the purpose of saving water, the washing liquid is not supplied. Since there is only one water channel leading to the upper part, it is difficult to sprinkle a large amount of washing liquid on the laundry from the upper part, and there has been a problem that uneven washing and remaining dirt are generated. Also, in a water-saving state where the laundry is exposed from the surface of the water, the detergent cannot be sufficiently dissolved because the laundry cannot be sufficiently stirred, so that it is difficult to effectively act on the laundry, and uneven washing or dirt is caused. However, there was a problem that undesired falling occurs.

[0005] The present invention is intended to solve the above problems, by performing the circulation of a predetermined amount or more of the washing liquid by a plurality of water circulation passage, increases the turnover rate of the washing liquid improves the dissolution rate of the detergent, short Predetermined washing performance in time
It is intended to realize.

[0006]

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a washing tub, a stirring blade rotatably disposed at the bottom of the washing tub, and the washing liquid being washed by rotating the stirring blade. A plurality of circulating water channels leading to the upper portion of the tub, a watering nozzle for spraying the washing liquid guided by the circulating water channels into the washing tub, and a motor for controlling a motor for rotating the stirring blade.
Control means, wherein the control means sets the amount of water sprayed per minute from the water spray nozzle to about 50% of the amount of water in the washing tub.
% Or more is defined as the means for solving the problem.

[0008]

[0009]

DETAILED DESCRIPTION OF THE INVENTION The present invention, by means for solving the problems described above, a plurality
Circulating more than a predetermined amount of washing liquid
And increase the dissolution rate of the detergent
The washing liquid can be sprinkled from the top and always
Washing liquid is supplied, and the washing liquid on the surface of the laundry is replaced.
Speed increases. Furthermore, for this reason, the predetermined
The washing performance can be realized.

[0010]

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

As shown in the figure, a water receiving tub 1 includes a washing and dewatering tub (hereinafter referred to as a washing tub) 3 having a stirring blade 2 rotatably disposed at a bottom portion thereof, and is provided outside the washing machine by a hanging rod 4. Hanged on 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 7a and 7b between the circulation tub cover 6 and the washing tub 3. A blade 8 is integrally provided on the back surface of the stirring blade 2, and a pump chamber 9 formed on the outer periphery of the blade 8 communicates with a plurality of circulation water passages 7 a and 7 b. An opening 10 is formed by opening the upper part of the plurality of circulation water passages 7 b toward the inside of the washing tub 3, and each of the openings 10 is provided with a watering nozzle 11. In addition, a lint filter 12 is provided in the opening 10 above the circulation channel 7a. Motor 1
3 drives the stirring blade 2 via the V-belt 14 and the speed reduction mechanism 15. The water level sensor 16 is connected to a lower part of the water receiving tub 1 to detect a water level in the washing tub 3, and outputs its output to the control device 17.

As shown in FIG. 2, the control device 17 comprises a control means 18, an operation display means 19, a storage means 20 and a power switching means 21. The control means 18 performs power switching based on the output of the water level sensor 16. The water supply valve 22 is controlled via the means 21 to control the level of water supplied to the water receiving tank 1. At this time, the control means 18 controls the water level of the washing tub 3 to a water level a at which the laundry 23 is exposed to the water surface. This water level a is
The ratio of the amount of the laundry 23 to be put into the washing tub 3 to the amount of water in the washing tub 3, that is, the bath ratio is 7 to 8.5, and the desirable value is 7.5 to 7.5.
The water level is set to 8. Note that the water level b is
Is the water level of a conventional washing machine set to be immersed in the water surface. The water level b is a water level at which the bath ratio becomes 8.5 to 9.

The control means 18 includes an operation display means 19
The motor 13, the water supply valve 22, the drain valve 24, and the like are sequentially controlled in accordance with the user's input in accordance with each of the washing, rinsing, and dehydrating processes. In each of the washing and rinsing steps, when the motor 13 is driven, the amount of water sprayed from the plurality of water spray nozzles 11 per unit time (one minute) is set to 30 liters. However, the washing tub 3 stores the laundry 23 in the rated capacity (6
Kg) When poured, the washing liquid is large enough to contain 63 liters, and the 30 liters of watering amount is about 50% of the water amount in the washing tub 3. In addition, 25 is a phase advance capacitor of the motor 13 and 26 is a power switch.

The operation of the above configuration 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) provided on the operation display means 19 is pressed. Then, the water supply valve 22 is operated by the control means 18 to supply water to a water level a lower than the conventional water level b detected by the water level sensor 16, and the washing process is started. When the washing process starts, the motor 13 is controlled by the control device 17 to rotate clockwise / pause / counterclockwise / pause according to the washing water flow. The rotation of the motor 13 controlled by the control device 17 is transmitted to the stirring blade 2 via the V-belt 14 and the speed reduction mechanism 15.

In accordance with the rotation of the motor 13, the stirring blades 2 and the blades 8 provided below the stirring blades 2 rotate, and the laundry 23 in the washing tub 3 and the washing liquid are stirred. On the other hand, the washing liquid between the blade 8 provided on the stirring blade 2 and the water receiving tub 1 is pushed out of the bottom of the water receiving tub 1 by centrifugal force due to the rotation of the blade 8, and passes through the circulation channels 7a and 7b. , A motor 13 from the watering nozzle 11 and the lint filter 12 into the washing tub 3.
Water is intermittently sprinkled according to the rotation of. At this time, since the plurality of circulation water passages 7b and the water spray nozzles 11 are provided, a large amount of washing liquid can be sprayed from the upper portion of the washing tub 3 by the rotation of the blades 8 provided on the stirring blade 2.

As shown in FIG. 3, the relationship between the circulating water amount of the washing liquid and the detergent dissolution rate is determined by a predetermined circulating water amount (spraying amount) J1.
The dissolution rate increases at the boundary. The inventors conducted various experiments using the washing tub 3 containing 63 liters of the washing liquid in a state where the laundry 23 contained the rated capacity (6 kg). As a result, it was found that the value of J1 was 30 liters. . Since the dissolution rate increases at the boundary of J1, if the amount of circulating water is set to J1 or more, washing can be performed with a high detergent concentration from the beginning of washing.

Also, the laundry 23
Since the speed at which the washing liquid on the surface is replaced also increases, the detergent can be made to effectively act on the stains on the laundry 23 during the washing process, and the washing performance can be improved and the washing unevenness can be reduced. FIG. 4 is a diagram showing the relationship between the washing time and the solubility of the detergent using the amount of circulating water as a parameter. FIG. 5 shows the relationship between the washing time and the washing performance under the conditions that cause this difference in solubility. FIG.

As shown in FIG. 4, the amount of circulating water is 30 minutes per minute.
It can be seen that the dissolution rate of the detergent is faster in the case of the characteristic A when the amount is larger than that in the liter, as compared with the characteristic B when the amount of the circulated water is small (the amount of circulation water is 15 liter). For this reason, as shown in FIG. 5, the characteristic A when the circulating water amount is large (circulating water amount 30 liters) is smaller than the characteristic B when the circulating water amount is small (circulating water amount 15 liters) for the same washing time. It can be seen that the washing performance is good, and the difference in the dissolution rate also results in a difference in the washing performance.
From this, if the target value of the washing performance is set to S1,
The washing time can be reduced from T1 to T2, and a predetermined washing performance can be obtained even if a short washing time is set by the control means 18.

In the above embodiment, about 50% of the amount of water in the washing tub 3 is circulated per minute. As is clear from FIG. 3, the detergent dissolving speed is increased by setting the circulating water amount to J1 or more. Can be further accelerated, and washing can be performed in a state where the detergent concentration is high from the beginning. In addition, although a plurality of watering nozzles 11 are provided, one watering nozzle 11 and one lint filter 12 may be attached to each, and the washing liquid may be circulated for 30 liters or more.

[0021]

According to the present invention, there is provided a washing tub, a stirring blade rotatably disposed at the bottom of the washing tub, and a plurality of circulating water passages for guiding the washing liquid to the upper portion of the washing tub by rotation of the stirring wing. A sprinkling nozzle for sprinkling the washing liquid guided by the circulating water channel into the washing tub, and the stirring blade to rotate.
Control means for controlling the motor, the control means,
Since the amount of water sprayed from the water spray nozzle per minute is about 50% or more of the water amount in the washing tub,
A plurality of circulation channels can circulate more than a predetermined amount of washing liquid, increasing the dissolving speed of the detergent and allowing a large amount of washing liquid to be sprinkled from the top, so that the washing liquid is always applied to the laundry. The rate at which the washing liquid is supplied and is changed on the laundry surface is increased. Furthermore, since washing can be carried out in a state where the detergent concentration is high from the beginning of washing, it is possible to effectively act on dirt adhering to the washing surface, thereby improving washing performance and reducing washing unevenness.

Further, the circulation amount of the washing liquid is increased as described above.
By shortening the washing time,
Also, a predetermined cleaning performance can be obtained.

[Brief description of the drawings]

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

FIG. 2 is a block diagram of the washing machine.

FIG. 3 is a diagram showing the relationship between the amount of circulating water and the detergent dissolution rate of the washing machine.

FIG. 4 is a diagram showing a relationship between a washing time and a detergent solubility of the washing machine.

FIG. 5 is a diagram showing the relationship between the washing time and the washing performance of the washing machine.

[Explanation of symbols]

 2 stirring blade 3 washing tub 7a circulating water channel 7b circulating water channel 11 watering nozzle

Continuation of the front page (72) Inventor Yoshitoyo Mishiro 1006, Kazuma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-2-302298 (JP, A) JP-A-54-100155 (JP, A) JP-A-54-98057 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06F 33/02 D06F 39/08

Claims (1)

(57) [Claims] 1. A washing tub, a stirring blade rotatably disposed at the bottom of the washing tub, a plurality of circulating water passages for guiding the washing liquid to an upper portion of the washing tub by rotation of the stirring wings, and a circulating water passage. The motor controls a watering nozzle for spraying the washed washing liquid into the washing tub and a motor for rotating the stirring blade.
Control means for controlling the amount of water sprayed per minute from the water spray nozzle by about 5 times the amount of water in the washing tub.
Washing machine with 0% or more.