JPS6099292A - Washer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a washing machine in which the washing water level and the reversal time of the agitating blade change in a plurality of ways during the washing process, that is, the washing water flow changes in a plurality of ways.

Conventional structure and its problems Traditionally, so-called whirlpool washing machines have been popular in Japan, in which a stirring blade is installed at the bottom of the washing tub, and the rotation of the stirring blade generates a swirling water stream to wash the clothes. .

In this type of washing machine, as shown in FIG. 1, stirring blades (a) are installed in a manner that projects from the bottom surface (C) of the washing tub into the washing tub.

When washing, water is supplied from a water supply device (not shown) and when it reaches a so-called specified water level e using a pressure switch or the like, the water supply is stopped and washing begins.

The basic process of a fully automatic washing machine is washing, draining, water, rinsing, draining, water, rinsing, draining, and water.The water level for washing and rinsing is always set before washing. The washing water flow is also operated at the originally set water flow. For example, the reversal time of stirring blade a is 25 in the case of strong water flow.
The machine repeats left-right reversal with a second run and a 5-second pause, and the water flow continues according to this reversal time during the washing and rinsing steps.

Usually, detergent is put into the washing tub prior to washing, so that the detergent concentration remains constant during the washing process, and washing continues with a constant water flow. In addition, in the rinsing process, the detergent concentration decreases, but the water flow inherits the washing water flow.

The diameter d1 of the stirring blade is usually about % or less of the inner diameter d2 of the washing tub, and the rotation speed of the stirring blade a is set to about 300 revolutions per minute.

That is, by using small-diameter stirring blades and high-speed rotation, a strong swirl of flow is generated in the center of the washing tub, and the water level is always constant, the detergent concentration is constant, and the detergent concentration is constant. Washing is carried out using a constant flow of water, and if a constant washing level is maintained, the clothes will be severely damaged, the washing will be uneven, and the clothes will become more kinked.

OBJECTS OF THE INVENTION The present invention focuses on the above-mentioned problems and provides a washing machine that improves the cleaning effect and reduces the amount of damage and dirt on clothes.

Structure of the Invention In order to achieve the above object, the washing machine of the present invention has a standard inversion when the water level is lower than the rated specified water level (standard water level) and is at the originally set rated specified water level (elongation rate water level). Time limit (
The agitation blade is operated with a reversal time shorter than the standard reversal time), and the second half of the washing time is at the specified rated water level. It was designed to be used for driving.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

Figure 2 shows the overall configuration of a fully automatic washing machine.
2 is a washing tub/dehydration tank (hereinafter referred to as a washing tub) having a large number of dehydration holes 3, and 4 is an agitator 1 rotatably installed at the inner bottom of the washing tub 2. The wing 6 is a water tank.

6 is a motor, and this rotational force is applied to a pulley 7, a belt 8. It passes through the pulley 9, is further decelerated by the deceleration drive mechanism 10, and is transmitted to the stirring blade 4.

The above is an overview of the overall configuration.Next, the specific configuration of the stirring blade 4 and the washing tub 2 will be explained with reference to FIGS. 3 and subsequent figures (partly of FIG. 2).

The stirring blade 4 has a hemispherical part 11 whose upper surface center part is raised in a spherical shape, and a base part 12 descends toward the outer periphery, descends a certain distance to become a base part 13, and a center part 14.
and a base 17 having a curved surface 16 that gently rises outward from approximately the midpoint of the outer peripheral portion 16, and a plurality of peaks 18 integrally formed on the ± sides of this base 17, The cross-sectional shape of the peak 18 is as shown in C-J in FIG.
Connected by o. Note that the portion shown in FIG. 3C-1 corresponds to the portion shown in FIG. 3C-1.

'-1: The outer diameter d1 of the stirring blade 4 is the inner diameter d2 of the washing tub 2.
If it is 1, it is about 0.7 to 0.9, and is installed at the bottom of the washing tub 2 as shown in FIG.

Furthermore, 21 is a time switch or a control device that controls the stroke, 22 is an electromagnetic water supply valve, and 23 is a pressure sensor that detects a plurality of water levels in the washing tub 2.

The operation of the above configuration will be explained.

First, prior to washing, clothes and detergent are put into the washing tub 2. The amount of detergent is usually added at a constant ratio to the amount of anti-layer water. For example, if the amount of washing water is 40 tons and the clothes being washed are dry and OR3 is 3, the water level for the standard amount of water for washing 40 tons is as shown in Figure 2. 24, which is the rated specified water level for rated clothing.

The standard concentration of detergent is to make the amount of detergent 0.133 times the amount of washing water, so it is necessary to add detergent 53y.

When the time switch or time limit device 21 is operated, the electromagnetic water supply valve 22 is operated to start water supply. When the supplied water level reaches the intermediate water level 25, which is one step lower than the A constant water level 24, the pressure sensor 23 operates to cut off the electricity to the electromagnetic water supply valve 22, and at the same time, the motor 6 is energized to rotate the stirring blades 4 and wash the clothes. Start.

At this time, the reversal time of the stirring blade 4 is longer than the reversal time at the originally set rated water level, or 1. It is operated with an O-kai reversal time limit.

That is, at the start of this washing, the standard concentration is in a thick state. For example, if the water volume at the middle water level is 304, the detergent concentration (for washing water) is 0.133% x 4
At a concentration of 0/30-0.177, and the reversal time of the stirring blade 4, if the reversal time at the originally set rated specified water level is 2 seconds of operation - 1 second of rest, the operation time will be shorter than this. Run for 1-4 seconds with a 1-second pause.

The washing time is normally set to about 10 minutes, but after a while (for example, 5 minutes) has passed after the start of washing, the water supply solenoid valve 22 is activated and water is supplied at the rated specified water level 24j:, the pressure sensor 23 is activated and the electromagnetic valve is activated. The power to the water supply valve 22 is cut off, and from now on, the rated water amount for the so-called rated clothing capacity,
The stirring blade 4 is operated at the originally set rated water level with a standard detergent concentration of 0.133% and a reversal time period of 2 seconds of operation and 1 second of rest.

Once the washing time has elapsed, the process moves to the draining, dewatering, and rinsing steps.

In order to detect different water levels, the pressure sensor 23 is provided with a plurality of pressure sensors with different detection water levels, or even one pressure sensor 23 can be taken out as a detection water level.

1, the reversal time of the stirring blades 4 is automatically changed in conjunction with the water level change.

In addition, during washing, the stirring blade 4 is rotated at a relatively low speed at 200 revolutions per minute or less.

The above can be summarized as shown in Table 1.

Table 1 In this way, the washing process is divided into at least two stages, with the first half having a high concentration of detergent, and the agitating blade 4 being operated at a shorter operating time than the originally set standard reversal time. .

In general, it is customary to add the appropriate amount of detergent to a standard concentration before washing.However, in real life, there are many types of stains, and these stains coexist, and the degree of stains ranges from severe stains to light stains. There is even.

Therefore, it is generally not advisable to wash with just the standard concentration, and it is wise to adjust the amount depending on the type and degree of dirt.From this point of view, it is better to increase the concentration of detergent when the dirt is heavy. However, increasing the concentration compared to the standard amount of water requires a large amount of detergent, which is undesirable.

Therefore, in the first half of the washing cycle, the detergent concentration is increased at a water level lower than the standard water level, so that the detergent has a sufficient cleaning effect on difficult-to-remove stains, and at the same time, the agitation blade is operated at a standard reversal time with a water level lower than the standard water level. The reason is that depending on the type of clothing, it is easy to cause damage, so the agitation blade is operated with a reversing time that is shorter than the standard reversing time to keep clothes from getting damaged, kinked, and tangled. In the second half of washing, the agitation blades are operated at standard inversion times and limits using a standard amount of water and a standard concentration to provide a gentle and sufficient agitation effect, without requiring a large amount of detergent. The cleaning effect of detergent is fully demonstrated on heavy dirt,
On average, the cleaning effect can be improved by about 10 times, and at the same time, uneven washing, kinking of clothes, and damage to tangled clothes can be suppressed.

In this X, the shape of the agitating blade 4 is concave as a whole, its outer diameter is made large, and by rotating at a low speed, the washed clothes are widely received and agitated, so that the above-mentioned effect is achieved. It has the effect of further promoting

By adopting the above embodiments and 114 configurations,
Specific effects were achieved as shown in Table 2.

Below is the second table in the margin, the cleaning effect is electric washing machine I I 5-C-9606
Washing unevenness is expressed as the degree of cleanliness according to the test method specified in It shows the weight loss ($) when the same type was washed 20 times.

In addition, so far, we have specifically explained the case where the stirring blade has an overall concave shape and has a large outer diameter and rotates at a low speed, but even with conventional stirring blades, the effect is close to Y. It is something that plays.

Moreover, this method is effective not only for fully automatic washing machines but also for two-tub washing machines.

Effects of the Invention As is clear from the above embodiments, according to the present invention, at least the washing process is performed, and the first half of the washing process is performed at a detergent concentration higher than the standard detergent concentration at a water level lower than the standard water level. By operating the stirring blades with a shorter reversal time than the originally set standard reversal time,
The cleaning power of the detergent works more effectively on difficult-to-remove stains, and it reduces damage, kinking, and tangles on clothes when the water level is low. Based on the detergent concentration, the stirring blades are operated with standard reversal time to slowly and vigorously stir the detergent, increasing the overall cleaning level and eliminating uneven washing.

This product is designed to reduce damage and tangles on clothing, and is particularly effective against stains that are difficult to remove.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view showing the overall configuration of a conventional washing machine;
The figure is a sectional view showing the overall structure of a washing machine according to an embodiment of the present invention, FIG. 3 is a plan view of its stirring blade, FIG. 4 is a sectional view taken along the line A-0-B in FIG. 3, and FIG. 'J is each cross-sectional view at the portions C to ■ in FIG. 3. 2... Washing tank, 4... Stirring blade, 24.
... Rated specified water level, 26 ... Medium water level. Name of agent Patent attorney Toshio Nakao and one other person Figure 3 Figure 4 Figure 5 Figure 7 1/Nok (I) + (J)

Claims (1)

[Claims] A pre-stroke in which the stirring blade is operated in reverse operation for a shorter operating time than the standard reversal time at a water level lower than the rated specified water level, and a standard reversal time at the rated specified water level.