JPH02289295A - Drum type washing machine - Google Patents

Abstract

PURPOSE:To produce an enough washing effect by reducing the occurrence of bubbling by a method wherein washing is effected such that a drum is first intermittently driven in a state to contain a low amount of water in a tub togetherwith detergent, and secondly, after drainage, the drum is continuously driven in a state water in an amount larger than that during first washing operation is contained in the tub. CONSTITUTION:In washing, a drum 4 is first intermittently driven in a state that water an amount lower than that during next washing operation is contained in a tub 2 togetherwith detergent, and secondary, after drainage, the drum 4 is continuously driven in a state that water in an amount higher than that during first washing operation is contained in the tub 2. In this case, a quantity of water during first washing operation is set to a level being 2/10-3/10 of the radius of the drum, and a quantity of water during subsequent washing operation is preferably set to a level being 5/10-6/10 of the radius of the drum. In which case, in first washing operation, a detergent solution is caused to mainly permeate laundry, and contaminant is wrapped with the detergent solution. In subsequent washing operation after drainage, regular separation of contaminate wrapped with the detergent solution from laundry is effected by means of water.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a drum-type washing machine that washes laundry by rotating the horizontal axis of the drum.

(Prior Art) Conventionally, in this straight drum type washing machine, a drum is installed in a tub for collecting water so as to be driven to rotate on a horizontal axis, and the rotation of the drum causes the laundry to be washed. I try to do "washing".

However, in "washing", the drum is rotated with the required amount of water and detergent stored in the tub, and the laundry inside is repeatedly lifted upwards and then dropped downwards. In this way, an impact force is applied to the laundry each time, so that the desired washing effect can be obtained.

(Problem to be solved by the invention) However, in a drum-type washing machine that performs "washing" as described above, when ordinary detergent is used, too much foam is generated, and the foam tends to fill the drum. So much so that
When this happens, most of the water in the drum (inside the tub) turns into bubbles and disappears, making it impossible or difficult for the water to separate the dirt from the laundry, making it difficult to remove the dirt. As a result, the washing effect becomes insufficient.

For this reason, in the above-mentioned drum-type washing machines, we use a detergent with a lower foaming degree than regular detergents, namely low-foaming detergent.However, the low-foaming detergent is It has the problems of not being generally marketable, being expensive, and having poor economic efficiency.

The present invention has been made in view of the above-mentioned circumstances, and therefore, its purpose is to obtain a sufficient washing effect with less foaming by using a normal detergent without using a low-foaming detergent. We are here to provide you with an excellent drum type washing machine.

[Structure of the Invention] (Means for Solving the Problems) The drum-type washing machine of the present invention has a drum installed in a tub for storing water so as to be driven to rotate on a horizontal shaft, and the drum is rotated by the rotation of the drum. The washing machine is designed to wash laundry, and the washing is carried out by intermittent driving of the drum while initially containing a smaller amount of water together with detergent in the tub than in the next washing operation. Then, after the washing operation, the drum is continuously driven with a larger amount of water stored in the tub than in the first washing operation.

In this case, the amount of water in the first washing operation can be set to a water level of 2110 to 3110 of the radius of the drum, and the amount of water in the next washing operation can be set to a water level of 5110 to 6/10 of the radius of the drum. preferable.

(Function) According to the above means, in the first washing operation, the detergent liquid is permeated into the laundry and the dirt is covered with the detergent liquid. In the next washing operation after draining, the dirt covered with the detergent liquid is separated from the laundry using water.

In this case, the amount of water in the first washing operation is set at a water level of 2/10 to 3/10 of the radius of the drum, and the amount of water in the next washing operation is set to a water level of 5110 to B/10 of the radius of the drum. If it is set to , it is possible to more reliably reduce foaming and obtain a sufficient washing effect.

(Example) An example of the present invention will be described below with reference to FIGS. 1 to 3.

First, in FIG. 1, reference numeral 1 denotes an outer box of the entire drum-type washing machine, and inside this, a water reservoir tab 2 is supported by a required number of elastic support mechanisms 3 and disposed therein. Reference numeral 4 denotes a drum disposed horizontally inside the tab 2, and has a drum shaft 5 protruding from the center of the end surface on the left side in the figure. bearing unit 6
It is rotatably supported through. Reference numeral 7 designates a plurality of baffles (only one is shown) protruding from the inner peripheral surface of the drum 4 for stirring the laundry, and reference numeral 8 designates water holes formed over almost the entire peripheral side of the drum 4.

On the other hand, 9 is a motor suspended on the outer lower surface of the tab 2, and a drive pulley 10 is attached to this motor.
and a drum pulley 11 mounted on the protruding end of the drum shaft 5 from the bearing unit 6.
2 is hanging.

13 is a water supply valve arranged at the upper left side in the figure of the outer box 1;
A first water supply channel 14 and a second water supply channel 15 leading into the tub 2
The first water supply channel 14 is equipped with a detergent supply device 15 in the middle of the first water supply channel 14.

Furthermore, 17 is a drain port formed at the bottom of the right side of the tub 2 in the figure, and a drain valve 18 is connected to this, and one drain hose leading to the outside of the machine is connected to the drain valve 18. are doing. 20 is a water level detection device, which consists of a detection device main body 21 fixedly provided on the upper right side of the outer box 1 in the figure, and an air trap 23 connected to this by an air tube 22.
, and a communication hose 24 that communicates the air trap 23 with the drain port 17, and has a low water level h1 in the tub 2, such that, for example, the laundry to be described later is submerged at the rated capacity.
Normal level higher than that (3/10 to 4 of the radius of drum 4)
/10) high water level h2 is detected.

In FIG. 2, 25 is a main control device consisting of a microcomputer, which is connected to the water level detection device 2.
0 inputs the water level detection signal. Further, the main control device 25 is also configured to receive a start signal for operation from a start switch 26 manually. 27 is a drive circuit, and the main controller 25 outputs a drive signal to the water supply valve 13, motor 9, and drain valve 18 via the drive circuit 27 according to a predetermined operation program. Figure 3 shows the operating program.

Therefore, in the case of the above-mentioned configuration, when the start switch 26 is set to I/ν and the operation is started, the "water supply" operation is performed in the first "washing" process, thereby closing the drain valve 18. Under this condition, the water supply valve 13 is opened to the first water supply channel 14 side.For this reason, the detergent supply device 1
Water is supplied and stored in the tub 2 along with the detergent supplied from the tub 2, and when the stored water level reaches a prescribed low water level h1 in this case, the water level detection device 20 detects it. Based on this, the water supply valve 13 is closed and water supply is stopped.

Then, the first "washing" operation is carried out for about 10 minutes in this case, so that the motor 9 is driven, in particular in this case intermittent reverse drive. The driving force is transmitted from the drive pulley 10 to the drum pulley 11 via the transmission belt 12.
, and from the drum pulley 11 to the drum shaft 5
, and the drum 4 is thus driven, particularly in this case, so as to repeat reversals within one revolution. Therefore, in this case, the laundry (not shown) previously stored in the drum 4 is easily lifted upward and dropped from the inside of the tub 2 to the bottom where the detergent liquid that has entered the drum 4 exists. It is moved repeatedly or to the extent that it is shaken, thereby allowing the detergent solution to penetrate into the laundry and enveloping the dirt with the detergent solution. Further, in this case, since the laundry does not move much, the amount of foaming of the detergent solution can be kept to a minimum.

Thereafter, by performing a "draining" operation, the drain valve 18 is opened, and the drain valve 18 is removed from the tub 2 and the drum 4.
8 and one drain hose to drain the detergent liquid.

Furthermore, by performing the "water supply" operation thereafter, the water supply valve 13 is closed while the drain valve 18 is closed.
In this case, the box 2 is opened to the water supply channel 15 side. For this reason, only water is supplied and stored in the tub 2 without detergent, and when the stored water level reaches the specified high water level h2 in this case, the water level detection device 20 is activated. Based on this detection, the water supply valve 13 is closed and the water supply is stopped.

Then, the second wash operation in step 1 is carried out for about 15 minutes, and the motor is driven, particularly in this case, continuously reversed. The driving force is transmitted to the drum 4 through the same path as described above, including the drive pulley 10, the transmission belt 12, the drum pulley 11, the drum shaft 5, and the drum 4. In some cases, it is driven to continuously invert. Therefore, in this case, the laundry in the drum 4 is repeatedly lifted upwards and dropped downwards, where the washing water that has entered the drum 4 from the tub 2 is present. Separation of dirt wrapped in laundry from laundry using washing water is being carried out in earnest. Also, in this case,
Even if the laundry moves rapidly, the detergent is diluted by the water stored at the high water level h2, so the amount of foaming can still be kept to a minimum.

After this, a 1-seat "drainage" operation is performed, and
The drain valve 18 is opened, and washing water containing detergent is discharged from the tub 2 and drum 4 through the drain valve 18 and one drain hose.

In addition, in the "dewatering" process after the "washing" process, the drain valve 1
8 is opened, the motor 9 is activated to continuously rotate the drum 4 in one direction at high speed. Water, especially water that still contains detergent,
The water is blown through the water holes 8 of the drum 4. Further, the shaken off water is discharged to the outside of the machine through the drain valve 18 and the drain hose 19.

In the "rinsing" process, for example, the same operations as the "water supply" operation at the second port, the "washing" operation and the "draining" operation at the second port in the previous "washing" step are repeated several times. , rinse the laundry.

Furthermore, in the subsequent "dehydration" process, the same operation as the above-mentioned "dehydration" process was performed, and the /) C contained in the laundry was carried out.
(in this case, detergent-free water) is shaken and discharged.

According to this embodiment, as described above, "during the first washing operation of the washing process J, the drum 4 is intermittently operated in a state where the tub 2 contains less water than the washing operation to be performed next, together with the detergent." The machine moves the laundry lightly, as if massaging it, allowing the detergent to penetrate and enveloping the dirt, which prevents the detergent from foaming. You can keep it small.

Then, in the next washing operation after draining water, the drum 4 is continuously driven with a larger amount of water stored in the tub 2 than in the first washing operation, thereby removing the dirt covered with the detergent solution mentioned above. When the desired washing effect is sufficiently obtained, the detergent is diluted by the large amount of water at this time, so the washing process is carried out in earnest. Even if objects move rapidly, foaming can still be kept to a minimum.Thus, it is not necessary to use a high (d5) low foaming detergent, which has a lower foaming degree than a regular detergent, and even when using a regular detergent. , it becomes possible to obtain sufficient washing efficiency, and economical efficiency can be improved.

In contrast to the above, FIGS. 4 to 8 show different embodiments of the present invention. In addition, FIG. 5 shows a reservoir water level h4 determined in place of the aforementioned reservoir water level h2 in the next washing operation. In this case 1, specifically, h4 is 2 of the radius r of the drum 4.
110 to 3/10, and h4 is 5 of the radius r of the drum 4.
/lO to [i/10, respectively. By determining this, the detergent concentration in the first washing operation can be set from about (1.17 to about 0.24[?(l), as shown in Figure 6.
], the detergent concentration in the next washing operation can be set to approximately 0.
゜08 to about (L 1 [9h]), and can be kept outside the area where abnormal foaming occurs, thus making it possible to more reliably suppress the occurrence of foaming.In addition, in this case As shown in Figure 7, the cleaning power can be increased by setting the detergent level of 4 degrees in the first washing operation as described above. By setting the storage water level for each operation as described above,
As shown in FIG. 8, high cleaning power can be obtained.

It should be noted that the present invention applies only to the six embodiments shown in the drawings. There is no set standard, and the details of the steps other than the "washing" step in the operation program and other points may be modified as appropriate without departing from the gist of the program. Ru.

[Effects of the Invention] The present invention is as described above, and the following effects can be obtained.

In the drum-type washing machine according to claim 1, the drum is provided in a tub for storing water so as to be driven to rotate in a spiral manner,
The drum is configured to wash the laundry by rotating the drum, and the drum is driven intermittently in the state in which a smaller amount of water is initially stored in the tub together with detergent than in the next washing operation. Then, after draining, the drum is continuously driven with a larger amount of water stored in the tub than in the first washing operation, so a low-foaming detergent is used. You can use regular detergents without foaming and get a sufficient washing effect.

In the drum-type washing machine according to the second aspect of the present invention, in the above-mentioned configuration, the amount of water in the first washing operation is set to 2710 to 3 times the radius of the drum. By setting the amount of water in the next washing operation at a water position of 5/10 to (i/ID) of the flat diameter of the drum, the above-mentioned foaming can be reduced and the washing effect can be sufficiently obtained. 1-) You can actually do it more easily.

[Brief explanation of the drawing]

Figures 1 to 3 show one embodiment of the present invention, with Figure 1 being an overall longitudinal sectional front view, and Figure 2 being an electrical (1)
FIG. 3 is a diagram of the operation program. Further, FIGS. 4 to 8 show different embodiments of the present invention, and FIG. 4 is a schematic longitudinal sectional side view of the drum portion showing the water level stored in the first washing operation, and FIG. The l! of the same part indicates the stored water level in the next washing operation. E approximate longitudinal side view, Figure 6 is a diagram showing the relationship between the stored water level, detergent concentration, and abnormal occurrence of foaming in each washing operation, and Figure 7 is for detergents d and 1.
FIG. 8 is a diagram showing the relationship between water level and cleaning power in each washing operation. In the drawing, 2 is a tab, 4 is a drum, 9 is a motor, 3 is a water supply valve, 14 is a first water supply channel, 15 is a second water supply channel,] 6
20 is a detergent supply device, 20 is a water level detection device, h, , h is the stored water level in the first washing operation, and 11□, h4 is the stored water level in the next washing operation. Out [hermit]

Claims (1)

[Claims] 1. A drum is installed in a tub for storing water so as to be driven to rotate on a horizontal axis, and the laundry is washed by the rotation of the drum. Washing is carried out by intermittent driving of the drum with the tub initially containing a smaller amount of water together with detergent than in the next wash run, and then after draining, a smaller amount of water in the tub than in the first wash run is carried out. A drum-type washing machine characterized in that said drum is continuously driven while containing a large amount of water. 2. The amount of water in the first washing operation is 2 times the radius of the drum.
2. The drum-type laundry according to claim 1, wherein the water level is set at a water level of /10 to 3/10 of the radius of the drum, and the water level in the next washing operation is set to a water level of 5/10 to 6/10 of the radius of the drum. Machine.