KR100479096B1 - Suds removing method of drum washer - Google Patents

Abstract

The present invention relates to a method for removing foam from a drum washing machine, wherein a dehydration stroke is performed after draining a rinsing water upon completion of a rinsing stroke, and a water level frequency is detected by sensing a water level frequency during the dehydration stroke of the first step. A second step of determining whether or not, a third step of stopping the dewatering stroke and supplying the wash water to a washing tank when the water level frequency is increased in the second step, and washing the water after supplying the washing water of the third step. And a fourth step of detecting a detergent concentration included in the step, and a fifth step of performing an additional rinsing stroke when the detergent concentration of the fourth step is equal to or greater than a set value.

When it is determined that the water level frequency rises during the dehydration stroke according to the set dehydration time, bubbles are generated, the dehydration stroke is stopped, the washing water is supplied, and the detergent concentration contained in the wash water is detected. In this case, an additional rinsing stroke is performed to completely remove residual detergent components remaining in the laundry, and it is possible to reduce the energy consumed to remove bubbles since repetition of water supply, draining and stopping processes is not required. .

Description

Foam removal method of drum washing machine {Suds removing method of drum washer}

The present invention relates to a defoamer method of a drum washing machine, and more particularly, to a defoaming method of a drum washing machine to detect whether bubbles are generated during dehydration administration and to perform dehydration in a state where bubbles are completely removed.

In general, a washing machine is a machine that removes stains on clothes by providing a mechanical action using electricity. A drum washing machine is rotated by a driving force of a motor while detergent, washing water, and laundry are put in a drum installed horizontally. Washing by using the friction between the drum and the laundry is almost no damage to the laundry and the laundry is not tangled with each other, knocking and rubbing has the washing effect.

1 is a cross-sectional view illustrating a structure of a general drum washing machine, a tub 6 installed to be suspended by a spring 4 inside a cabinet 2 and a drum installed inside the tub 6 to wash laundry. (8) a washing tank (10), a lifter (12) installed on the inner side of the drum (8) to lift the laundry so that the laundry can be dropped by gravity at a predetermined height, and the tub (6) It is configured to include a motor (14) mounted on one side to rotate the drum (8), and further comprises a water level sensor (not shown) for detecting the water level in the washing tank (10).

In addition, the upper side of the cabinet 2 has a water supply hose 18, a water supply valve 20 and a detergent box 22 for supplying washing water and detergent into the tub 6, the tub 6 The lower side of the) further comprises a drain pump 24 and the drain hose 26 for circulating or draining the wash water.

In this case, bubbles are generated during the dehydration stroke due to the residual detergent component remaining in the laundry when the drum washing cycle is completed.

Therefore, the defoamer method of the drum washing machine according to the conventional technique for removing the foam generated during the dehydration stroke, as shown in Figure 2, first to detect whether the water level frequency during the dehydration stroke in the first step is increased. (See S1 and S2)

In the second step, when the water level frequency is increased in the first step, it is determined that bubbles are generated, and the washing water remaining in the washing tank 10 is drained (see S3).

The third step stops the dehydration stroke for a predetermined time after the wash water is drained after the second step of draining the wash water (see S4).

That is, the dehydration stroke is stopped while bubbles are removed after the washing water supply.

In the fourth step, the washing water is supplied to the set water level after the set time elapses in the third step (see S5).

In the fifth step, the second to fourth steps are repeatedly performed for a set number n to completely remove bubbles. (See S6.)

Here, in the fifth step, bubbles are removed by repeating the second to fourth steps three times.

In the sixth step, when the setting number n of the fifth step is completed, the dehydration step is performed again (see S7).

In the seventh step, when the dehydration time elapses after the dehydration stroke is re-executed in the sixth step, the dehydration administration is completed. (See S8 and S9.)

However, the conventional foam washing method of the drum washing machine as described above repeatedly performs the process of draining and supplying the washing water and stopping the process for a set time in order to remove bubbles generated during the dehydration stroke. There is a problem that the residual detergent component may remain in the laundry even after repeatedly performing the draining, watering and stopping process, which may adversely affect the user's health when the user wears the laundry.

The present invention has been made to solve the above problems of the prior art, the object of which is to increase the water level frequency during the dehydration stroke, when it is determined that the foam is generated water to wash water and the concentration of detergent contained in the wash water If is higher than the set value, additional rinsing stroke is performed accordingly to prevent residual detergent components from remaining in the laundry at the completion of the dehydration stroke, and it is not required to repeatedly perform the water supply, drainage and stopping process, thereby reducing energy consumption. It is to provide a foam removing method of the drum washing machine.

According to a feature of the foam removing method of the drum washing machine according to the present invention for solving the above problems, the first step of performing a dehydration stroke after draining the wash water when the rinsing stroke is completed, and the water level during the dehydration stroke of the first step A second step of detecting a frequency and determining whether the water level frequency rises; a third step of stopping the dewatering stroke and supplying the wash water to a washing tank when the water level frequency is increased in the second step; And a fourth step of detecting a detergent concentration included in the wash water after water supply of the washing water and a fifth step of performing an additional rinsing stroke when the detergent concentration of the fourth step is equal to or greater than a set value.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the foaming method of the drum washing machine according to the present invention, as shown in FIG. 3, first, when the rinsing stroke is completed in the first step, a dewatering stroke is performed after draining the rinsing water.

The second step determines whether the water level frequency detected by the water level sensor described above rises during the dehydration stroke of the first step (see S22).

In the third step, when it is determined that the water level frequency detected in the second step is increased, it is determined that bubbles are generated in the washing tank 10 (see S23).

Here, reference numerals not described in FIG. 3 use the same reference numerals as in FIG. 1.

In the fourth step, the dewatering stroke is stopped to remove the bubbles generated in the third step (see S24).

In the fifth step, the water supply valve 20 is turned on after the dehydration stroke of the fourth step is turned on, and the washing water of a predetermined level is supplied into the washing tank 10 (see S25).

In the sixth step, the drum is rotated left and right for a predetermined number of times so that the remaining detergent component included in the laundry can be completely dissolved in the wash water when the washing water of the fifth step is completed at the set water level (see S26).

The seventh step detects the detergent concentration contained in the wash water after the drum rotation of the sixth step.

Here, the detergent concentration is installed on the lower side of the tub (6) is detected through an electrode sensor (not shown) for measuring the conductivity of the wash water, the conductivity is magnesium ions and calcium ions contained in the wash water It depends on the content of hardness components such as the application.

Therefore, the conductivity according to the detergent concentration contained in the wash water on the basis of the conductivity of the wash water that does not dissolve the detergent is stored in advance in the microcomputer to control the operation of the drum washing machine according to the conductivity measured by the electrode sensor It is possible to detect the detergent concentration of the wash water.

The eighth step allows the additional rinsing stroke to be performed when the detergent concentration detected in the seventh step is greater than or equal to the set value (see S28 and S29).

In the ninth step, the dehydration step is performed again after completion of the eighth additional rinsing step (see S30).

The tenth step is completed when the dehydration time for which the dehydration step of the ninth step is set elapses (see S31 and S32).

The foam removing method of the drum washing machine according to the present invention configured as described above stops the dewatering stroke and supplies the washing water when it is determined that the water level frequency rises during the dehydration stroke according to the set dewatering time. Detecting the concentration of detergent contained in the wash water, if the detergent concentration is above the set value, the additional rinsing stroke is performed to completely remove the remaining detergent components in the laundry, as well as to repeatedly perform the water supply, draining and stopping process. As a result, the energy consumed to remove the bubbles can be reduced.

1 is a cross-sectional view showing a structure of a general drum washing machine,

2 is a flow chart illustrating a bubble removing method of the drum washing machine according to the prior art,

3 is a flow chart illustrating a method for removing bubbles in the drum washing machine according to the present invention.

Claims (4)

A first step of performing a dehydration stroke after draining the washing water when the rinsing stroke is completed; A second step of detecting a water level frequency during the dehydration operation of the first step and determining whether the water level frequency rises; A third step of stopping the dewatering stroke and supplying the wash water to a washing tank when the water level frequency is increased in the second step; A fourth step of detecting a detergent concentration of the wash water after the third step of washing water supply; And a fifth step of performing an additional rinsing stroke when the detergent concentration of the fourth step is greater than or equal to a predetermined value. The method of claim 1, The third step includes a first step of determining that bubbles are generated when the water level frequency rises; A second process of supplying wash water according to the determination result of the first process; Foam of the drum washing machine, characterized in that the drum is rotated so that the time required for dissolving the detergent in the washing water to the water remaining at the same time as the washing water of the second process is generated is reduced How to remove. The method of claim 2, Wherein the third step is defoaming the drum washing machine, characterized in that further comprising the step of terminating the dehydration stroke after the set dehydration time when the water level frequency in the second step does not rise. The method of claim 1, The fifth step of the foam washing method of the drum washing machine, characterized in that further comprising the step of performing the dehydration process again if the detergent concentration is less than the set value.