KR20040047021A - Washing machine sensoring detergent concentration and its operating method - Google Patents

Abstract

PURPOSE: A washing machine of sensing detergent and an operating method of the washing machine are provided to improve washing efficiency by reducing RPM(Revolution Per Minute) when detergent is inputted excessively and increasing RPM and time when small quantity of detergent is inputted. CONSTITUTION: Detergent and washing water are inputted into a washing tub(S1,S2). Concentration of detergent dissolved in washing water is sensed(S3). Concentration is sorted into high, standard and lower concentration by comparing concentration of detergent with reference value(S4,S5,S6,S7,S8). A centrifugal permeation washing is operated by setting RPM(Revolution Per Minute) and rotating time according to concentration of detergent(S9). A washing stroke is operated after passing rotating time(S10). Thereby, overflowing of foam is prevented by reducing RPM of a washing tub when detergent is in high concentration and generation of foam is induced by increasing RPM and rotating time when detergent is in lower concentration.

Description

Washing machine sensoring detergent concentration and its operating method

The present invention relates to a detergent-type washing machine, and in particular, by setting the rotational speed and the rotation time of the washing tank according to the concentration of the detergent during centrifugal permeation washing to adjust the amount of foaming of the detergent to improve the safety and efficiency of the washing stroke. It relates to a detergent-sensing washing machine and an operation method thereof.

In general, a fully automatic washing machine is a washing, rinsing, and dehydration process in a washing tank, and is a device that automatically performs water supply and drainage action required when a detergent is added and changed in operation, and includes a washing tank equipped with a pulsator ( 10), the water supply and drain valve 30 for supplying and draining the wash water, the drive motor 40 and various sensing means 30 for driving the washing tank 10, and the signal output from the sensing means According to the present invention is configured to include a microcomputer (not shown) for programming the amount of detergent or washing pattern and the like to control the operation of the washing machine.

The detection means 20 is different depending on the model, but a quantity detection sensor for detecting the amount of laundry, a water level sensor for detecting the level of the wash water, a temperature sensor for detecting the temperature of the wash water, the detection means Micom received the value detected through the combination and conversion to control the washing, rinsing, dehydration stroke.

The amount of detergent put into the washing machine configured as described above may be supplied in an excessive or insufficient amount compared to the standard requirement, and the conventional washing machine performs centrifugal washing in a state in which an excessive amount of detergent is put in a washing stroke without considering the actual amount of detergent. If the water flows from the circumference of the washing tank by the centrifugal force to the center of the washing tank, the foam overflow of the detergent and the residual phenomenon of the detergent during rinsing are inconvenient to use. If this is done there is a problem that the washing power is lowered.

The present invention has been made to solve the above-mentioned problems of the prior art, the object of the present invention is to reduce the rotational speed of the washing tank when the amount of detergent is added to the standard requirement, the concern of centrifugal permeation washing by reducing the rotation time Detergent-type washing machine and its operation method which can improve washing power by preventing the overflow of foam and performing stable washing stroke and increasing the rotation speed and rotation time of washing tank when a small amount of detergent is added To provide.

1 is a cross-sectional view showing the structure of a general washing machine;

Figure 2 is a graph showing the centrifugal rotational speed of the washing tank set according to the detergent concentration of high concentration during centrifugal permeation washing of the detergent-sensitive washing machine of the present invention,

Figure 3 is a graph showing the centrifugal rotational speed of the washing tub set according to the detergent concentration of the standard concentration during centrifugal permeation washing of the detergent-sensitive washing machine of the present invention,

4 is a graph showing the centrifugal rotational speed of the washing tub set according to the detergent concentration of low concentration during centrifugal washing of the detergent-sensing washing machine of the present invention;

5 is a flowchart illustrating a method of operating a detergent-sensing washing machine of the present invention.

<Explanation of symbols on main parts of the drawings>

1: innermost 2: outermost

10: washing tank 20: water quality sensor

30: drain valve 40: drive motor

According to a characteristic of the detergent-sensing washing machine and its operation method according to the present invention for solving the above problems, a washing tank in which washing water and detergent are supplied to wash laundry when centrifugal permeation washing, and the washing tank has a left and right direction A drive motor for driving the washing tank to alternately rotate the centrifugal movement, a water quality sensor for sensing the concentration of the detergent dissolved in the washing water, and the water quality to adjust the amount of foam generated by the centrifugal rotation movement A first feature is configured to include a microcomputer for setting the rotational speed and the rotation time of the washing tank according to the concentration of the detergent sensed by the sensor, and generates and outputs a control signal of the driving motor according to the first,

The first step of introducing detergent and wash water into the washing tank, the second step of detecting the concentration of detergent dissolved in the wash water, and the concentration is a high concentration, standard concentration, low concentration by comparing the concentration of the detergent and the reference value The fourth step of the separation and the rotational speed and the rotation time of the washing tank is set according to the concentration of the detergent separated in the third step, the fourth step of performing centrifugal permeation washing, and the washing after the rotation time of the fourth step A second feature is to include a fifth step in which the stroke is performed.

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

2 is a graph illustrating the centrifugal rotational speed of the washing tub set according to the detergent concentration of high concentration in the centrifugal washing of the detergent-sensing washing machine of the present invention, and FIG. 4 is a graph illustrating the centrifugal rotation speed of the washing tank set according to the detergent concentration of the standard concentration, and FIG. 4 illustrates the centrifugal rotation speed of the washing tank set according to the detergent concentration of the low concentration during the centrifugal permeation washing of the detergent sensing washing machine of the present invention. It is a graph.

Since the structure of the washing machine of the present invention has the same structure as the washing machine described in the description of the prior art, it will be omitted based on the detailed description of the prior art. However, the sensing means 20 of the present invention further includes an electrode sensor for sensing the conductivity of the wash water. Hereinafter, the temperature sensor and the electrode sensor are referred to as water quality sensor.

The water quality sensor detects the temperature and conductivity of the wash water and outputs it to the microcomputer, and the microcomputer can calculate the detergent concentration dissolved in the wash water by determining the hardness value of the wash water by combining and converting it.

The microcomputer divides the detergent concentration into high concentration, standard concentration, and low concentration by comparing the calculated detergent concentration with a reference value. The centrifugal permeation washing is performed by differentially setting the rotation speed (RPM, Revolutions Per Minute) and the rotation time of the washing tank according to the concentration of the separated detergent.

Centrifugal permeation washing is a washing method in which washing water is pumped to the circumference of the washing tank by centrifugal force by the high-speed centrifugal rotational movement of the washing tank to increase the washing power by passing water between the laundry. The pause will be repeated.

Therefore, in order to control the amount of bubbles generated due to the drop of water rising during the centrifugal permeation washing and a plurality of rotational direction changes, the microcomputer reduces the rotational speed and the rotation time when the detergent concentration is high, and suppresses the generation of bubbles, and rotates when the concentration is low. Increasing the speed and rotation time to induce foam generation, if the standard concentration maintains the preset standard rotation speed and standard rotation time, accordingly generates and outputs a signal to control the driving motor to rotate the washing tank during centrifugal transmission Can be controlled.

When the centrifugal permeation washing is completed, the washing tank is rotated in one direction to perform a washing stroke, which is called general washing.

2 to 4 show graphs in which the rotational speed (RPM) of the washing tank is the vertical axis and the time is the horizontal axis when high concentration, standard concentration, and low concentration detergent are added, and the RPM value and the centrifugal permeation washing are driven. The time can be changed by the producer.

Looking at the operation of the present invention configured as described above with reference to Figure 5 is shown the operation method of the detergent-sensing type washing machine of the present invention.

After the laundry and detergent are put into the washing tank (S1), the washing water is supplied to the appropriate level (S2).

The concentration of the detergent dissolved in the wash water is detected by the water quality sensor (S3). The concentration of the detergent is determined by the microcomputer based on the hardness value estimated by combining and converting the temperature and the conductivity detected by the water quality sensor.

In addition, the microcomputer compares the detergent concentration with a reference value in order to divide the detergent concentration into three levels of high concentration, standard concentration, and low concentration. The reference value is preset as a first reference value that distinguishes the low concentration and the standard concentration of the detergent, and a second reference value that distinguishes the standard concentration from the high concentration.

Therefore, if the detergent concentration is less than the first reference value (S4), since the concentration is low, the rotation speed of the washing tank is increased by 20 RPM than the standard speed (V), and the driving time of the centrifugal permeation washing is 10 minutes than the standard driving time (M). By increasing (S5), it is possible to increase the amount of foam to increase the washing efficiency by using a detergent of low concentration compared to the appropriate detergent concentration.

When the detergent concentration is greater than the second reference value (S6), since the concentration is high, the rotation speed of the washing tank is reduced by 20 RPM than the standard speed (V), and the driving time of the centrifugal permeation washing is shortened by 10 minutes than the standard driving time (M). Accordingly (S7), it is possible to ensure the safety of the washing stroke by preventing the foam overflow phenomenon due to the excess detergent relative to the appropriate detergent concentration. In addition, it is possible to prevent the residual phenomenon of the detergent generated during the rinsing stroke due to the excess foam.

When the detergent concentration is greater than or equal to the first reference value and less than or equal to the second reference value, the predetermined rotation speed V and the driving time M are maintained by being divided into standard concentrations (S8).

The rotational speed V and the driving time M may be changed to values preset by the producer, and the increase and decrease values may also be changed.

During the drive time set differently according to the detergent concentration by the microcomputer, the rotation speed (RPM) of the washing tank is output to the driving motor for driving the washing tank, and centrifugal permeation washing is performed (S9).

General washing and rinsing in which the washing tank is rotated in one direction, dehydration proceeds (S10), and the overall stroke is finished.

Detergent detection type washing machine and its operation method of the present invention configured as described above is to reduce the driving time and the rotational speed of the washing tank when the detergent concentration is a high concentration in the centrifugal permeation washing, when the detergent concentration is actually put into excess detergent Preventing foam overflow due to the low concentration, and increases the driving time and the rotational speed of the washing tank to induce foaming to improve the washing power, it is possible to improve the safety and efficiency of the washing stroke at the same time.

Claims (6)

A centrifugal washing machine, in which washing water and detergent are supplied to wash laundry; A driving motor for driving the washing tank so that the washing tank alternately rotates the left and right in centrifugal directions; A water quality sensor for detecting a concentration of detergent dissolved in the wash water; In order to adjust the amount of detergent generated by the centrifugal rotational movement, the rotation speed and the rotation time of the washing tub are set according to the concentration of the detergent sensed by the water quality sensor, and the control signal of the driving motor is generated accordingly. Detergent-type washing machine, characterized in that configured to include a microcomputer to output. The method of claim 1, The water quality sensor comprises a temperature sensor for sensing the temperature of the wash water, and an electrode sensor for detecting the conductivity of the wash water, according to the temperature and conductivity of the wash water, the microcomputer to determine the concentration of the detergent Detergent-sensitive washing machine characterized in that. The method of claim 1, The microcomputer divides the concentration of the detergent into a high concentration, a standard concentration, and a low concentration, so that the washing tank rotates at a low speed at a high concentration, rotates at a medium speed at a standard concentration, and rotates at a high speed at a low concentration. washer. A first step of introducing detergent and washing water into the washing tank; A second step of detecting a concentration of the detergent dissolved in the wash water; A third step of dividing the concentration into a high concentration, a standard concentration, and a low concentration by comparing the concentration of the detergent with a reference value; A fourth step in which the rotational speed and the rotation time of the washing tank are set according to the concentrations of the separated detergent of the third step, and centrifugal permeation washing is performed; And a fifth step in which a washing stroke is performed after the rotation time of the fourth step is elapsed. The method of claim 4, wherein The reference value is a method of operating a detergent-sensing washing machine, characterized in that the first reference value for distinguishing the low concentration and the standard concentration of the detergent, and the second reference value for distinguishing the standard concentration and the high concentration. The method of claim 4, wherein The fourth step is a method of operating a detergent-sensing washing machine, characterized in that the higher the concentration of detergent is set to shorten the rotation speed and rotation time of the washing tank.