KR20000045026A - Draining method for a drum type washing machine - Google Patents

Abstract

PURPOSE: A draining method for drum type washing machine is provided to completely prevent a noise due to a no-load operation by performing the draining only in case that the minimum amount of washing water exists. CONSTITUTION: A drain pump is operated during a reference operation time on carrying out a draining process and then the drain pump is stopped(S102). An initial water level value(Pi) in a drain line is detected after the drain pump is stopped(S103). The drain pump is re-operated to drain the washing water in case that the initial water level value(Pi) is over a reference water level value(Po)(S105). The operation of the drain pump is stopped in case that a follow-up water level value(Pn) is less than the reference water level value(Po).

Description

Drainage method of drum washing machine

The present invention relates to a drainage method of a drum type washing machine, and more particularly, to a drainage method of a drum type washing machine for preventing idle noise of the drain pump when draining in the drum type washing machine.

In general, the washing machine is largely divided into a washing tank method and a drum method according to its operation or structure, and the washing tank method is also divided into automatic and two tank types. Recently, most households use automatic washing machines and drum washing machines, which are mainly used in households or laundries with a large number of families because of the advantage of being able to wash large quantities of laundry quickly.

In general, the drum type washing machine, as shown in FIG. 1, restricts the external shape of the washing machine, and includes a main body 1 in which a door 2 having a window for entering and exiting laundry and observing the washing state is mounted in an openable manner. ). Of course, the top plate 3 is formed on the upper portion of the main body 1 so as to be opened and closed as necessary. In addition, a tub 5 that is stably supported by the support means 4 and stores wash water is installed inside the main body 1, and a drum 6 is provided inside the tub 5. It is rotatably installed so that the laundry to be washed is contained in the drum (6). Of course, a plurality of holes are drilled in the drum 6 so that the washing water in the tub 5 is introduced into the drum when washing, and the washing water is discharged through the hole when dewatering.

In addition, one side of the drum 6 is closed, and a drive shaft 8 is formed at the center of one side thereof, and a pulley 9 is integrally formed at the end of the drive shaft 8. On the other hand, the lower part of the tub 5 is equipped with a motor 11 mounted on the main body by the support 10, the rotary shaft 12 is also formed on the motor 11, the pulley at the end of the rotary shaft 12 (13) is integrally formed. Accordingly, the pulley 8 of the drum 6 and the pulley 13 of the motor 11 are connected to each other by the belt 14, so that the drum 6 is interlocked with the operation of the motor 11.

On the other hand, a detergent container 15 for supplying detergent to the drum 6 during washing is provided at the upper part of the main body, and water supply for supplying washing water to the drum 6 or the tub at the upper part of the tub 5. The line 16 is provided, and one end of the water supply line 16 is integrally formed with a water supply port 17 which communicates with the tub 5 and communicates with the detergent container 15. Tub 5 is simultaneously supplied with washing water and washing water. Of course, the water supply line 16 is provided with a water supply valve 18 to control the water supply amount of the wash water supplied to the tub (5).

Of course, a drain line 19 communicating with the tub 5 is installed to discharge the wash water in the drum 6 and the tub 5 to the outside after washing, and the wash line drains the wash water easily and quickly. In order to make the drain pump 20 is installed.

According to this configuration, when the user puts the laundry in the drum (6) to operate the washing machine, the washing water is supplied to the tub (5) with the detergent through the water supply port 17, the washing water and detergent The mixture flows into the drum 6 through the holes of the drum 6 and then the washing water rotates as the drum 6 is rotated by the operation of the motor 11 and thus the laundry rotates, rises and falls continuously and repeatedly. Washing is performed by the impact and stretching action with the wash water.

On the other hand, during the drainage stroke and dehydration stroke during washing with such a conventional drum type washing machine to operate the drain pump 20 to discharge the wash water in the tub (5) or drum (6) through the drain line (19). .

However, during such drainage operation, since the washing water is sufficiently present in the drainage line 19 at the initial stage, the pump is normally operated to perform a predetermined drainage action, while as the drainage proceeds, the washing water in the drainage line 19 decreases. Or depleted, the pump is idle, and thus there is a problem that the noise is severely generated.

In addition, the operation of the pump during the drainage operation continues regardless of the amount of washing water to be drained for a fixed time during the drainage stroke or the dehydration stroke, that is, even when the wash water is drained early, noise caused by idling of the pump is generated. Of course, there was a problem that unnecessary power is consumed.

Accordingly, the present invention has been made to solve the above problems, an object of the present invention is to provide a drainage method of a drum type washing machine that can prevent the idle pump of the drainage pump due to lack of wash water during drainage.

It is another object of the present invention to provide a drainage method of a drum type washing machine for preventing waste of noise and power due to idling of the drainage pump by operating the drainage pump according to the amount of washing water to be drained in the drainage line.

1 is a cross-sectional view showing a general structure of a conventional drum type washing machine.

Figure 2a is a cross-sectional view showing the structure of a drum type washing machine according to the present invention.

Figure 2b is a block diagram showing the configuration and operation of the drum type washing machine according to the present invention.

3 is a flow chart showing a drainage method of the drum type washing machine according to the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

19: drainage line 20: drainage pump

22: water level sensor 24: temperature sensor

26: water level detection unit 28: heater

30: drive unit 32: microcomputer

These objectives include a drain line having a drain pump for discharging the wash water and a level detection sensor for detecting the level of the wash water to be drained, and a reference level value which is the lowest level of the wash water to be drained in the drain line. In the drainage method of the drum type washing machine with a microcomputer in which the reference operation time is set, which is essentially the minimum drainage pump operation time at which the drainage pump is to be operated when the drainage administration requires drainage during the washing operation. Stopping the drainage pump after the drainage pump is operated by the drainage pump for a reference operation time, detecting an initial level value in the drainage line after the drainage pump is stopped, and the initial level value is a reference level value set in the microcomputer If greater, restarting the drain pump to drain the wash water, and If the subsequent level value of the water level is detected and the subsequent level value is greater than the reference level value, the drain pump is continuously operated to drain and at the same time the subsequent level value in the drain line is continuously detected, and the subsequent level value is the reference level level. If less than the value can be achieved by the drainage method of the drum type washing machine, characterized in that the step of stopping the operation of the drain pump.

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

Figure 2a is a cross-sectional view showing the structure of a drum type washing machine according to the invention, Figure 2b is a block diagram showing the configuration and operation of the drum type washing machine according to the invention, Figure 3 according to the present invention The flowchart showing the drainage method of the drum type washing machine is shown, and the same components as those of the conventional drum type washing machine shown in FIG. 1 are given the same reference numerals.

First, according to FIG. 2a, a drum type washing machine to which the drainage method according to the present invention is applied basically includes a main body 1 in which a door 2 having a window is opened and closed, and a top plate at the top of the main body. 3) is formed so as to be opened and closed as needed, a tub (5) for storing the wash water is provided inside the main body (1), the drum (6) inside the tub (5) ) Is rotatably installed. In addition, a drive shaft 8 is formed at the center of one side of the drum 6, and a pulley 9 is integrally formed at the end of the drive shaft 8, and a support 10 is disposed below the tub 5. The motor 11 attached to the main body is mounted, and the rotating shaft 12 is also formed in the motor 11, and the pulley 13 is integrally formed at the end of the rotating shaft 12. As shown in FIG. In addition, a detergent container 15 for supplying fines to the drum 6 during washing is provided at an upper portion of the main body, and a water supply for supplying washing water to the drum 6 or the tub at the upper portion of the tub 5. A line 16 is provided, and a water supply port 17 communicating with the tub 5 and communicating with the detergent container 15 is integrally formed at one end of the water supply line 16. Of course, the water supply line 16 is provided with a water supply valve 18 for controlling the amount of wash water supplied to the tub (5). In order to discharge the washing water in the drum (6) and the tub (5) after washing, a drain line (19) communicating with the tub (5) is installed, and the drain line easily and quickly drains the washing water. Drainage pump 20 is installed

In particular, the drainage line 19 of the washing machine for implementing the drainage method according to the present invention is provided with a water level detection sensor 22 for detecting the water level or the quantity present therein. The water level detection sensor 22 may be implemented by various types of sensors, and may also detect the actual amount of water to be expected or the water level existing in the water drain line by using the water pressure or water pressure in the water drain line.

In addition, as shown in FIG. 2B, the drum type washing machine to which the drainage method according to the present invention is applied has a temperature sensing unit 24 for sensing the temperature of the washing water, and a level of the washing water of the tub or drum. The water level detecting unit 26, the washing motor 11, the water supply valve 18, the driving pump 30 for driving the drainage pump 20 and the heater 28, and the respective configuration through the driving unit In addition to performing the washing operation of the laundry while controlling the drive of the parts, in particular, the microcomputer 32 performing the draining operation by analyzing the value received from the drainage water level detection sensor 22 during drainage, and rectifying and regulating the AC power supply. And a power supply unit 34 for supplying the operating power to the microcomputer.

In particular, the microcomputer 32 has the lowest level of the wash water to be drained in the drainage line 19 during the drainage operation described in detail below, that is, when the drainage pump 22 is operated for drainage, the drainage pump does not idle. The reference level value Po, which means the minimum washing quantity of, is set by experiment or data and stored or input in advance. In addition, a minimum drainage pump operation time, that is, a reference operation time (To), is input when a drainage pump requires drainage during a washing operation. It is preferable to set a smaller than the total drainage time required for the stroke, in order to prevent the drainage pump is operated and idle even though the wash water below the reference level value Po exists in the drainage line.

The drainage administration during the washing operation in the washing machine configured as described above with reference to FIG. In this way, when the drain stroke is executed, the microcomputer initially operates the drain pump during the standard operation time (To) to discharge the wash water and then stops the operation of the drain pump (S102). The initial water level value Pi is detected by measuring the water level in the drainage line using S103.

When the detected initial water level value Pi is transmitted to the microcomputer, the microcomputer determines whether the initial water level value Pi is larger than the reference water level value Po stored in the microcomputer (S104), and the initial water level value Pi If) is greater than the reference level value Po, the drainage pump is operated to continuously cultivate the water (S105). On the contrary, when the initial water level Pi is smaller than the reference water level Po, since there is no minimum wash water to be drained in the drain line, the drainage stroke is terminated.

While the drainage is in progress due to the continuous operation of the drainage pump, the subsequent level value Pn in the drainage line is detected again (S106), and the subsequent level value Pn is greater than the reference level value Po stored in the microcomputer. If it is determined (S107) that the subsequent water level value Pn is larger than the reference water level value Po, the drainage pump is continuously operated to drain the water and the subsequent water level in the drain line is repeatedly detected. On the contrary, when the subsequent water level value Pn is smaller than the reference water level value Po, since there is no minimum washing water to be drained in the drain line as described above, the operation of the drain pump S108 is stopped (S108). The administration ends.

Of course, since the reference operating time T of the drain pump actually set in the microcomputer is set very small compared to the overall drain stroke time, the initial water level value Pi detected in the initial water level detection step S103 is In practice, it is understood that a subsequent step is performed continuously because most of them are detected to be larger than the reference water level Po.

Accordingly, in the drainage operation executed in the washing machine, the drainage pump is operated only when the amount of wash water to be drained to the drain line is kept to a minimum, and the drainage is executed. If it exists below, the drainage pump is automatically stopped to prevent idling of the drainage pump due to lack of wash water.In addition, the drainage pump operates automatically when there is no wash water to be drained regardless of the fixed drainage time. This will end the actual drainage stroke.

As a result, according to the drainage method of the drum type washing machine according to the present invention, the drain pump is operated only when there is a minimum amount of washing water to be drained in the drain line during the drainage operation, thereby completely draining the noise by idling the drain pump. In addition, it is possible to completely prevent the loss of power due to unnecessary drainage pump driving, and also to shorten the actual drainage operation when the amount of washing water to be drained is small, thereby effectively ending washing. will be.

While preferred embodiments of the present invention have been described above, it will be understood by those skilled in the art that various modifications and changes can be made without departing from the scope of the claims.

Claims (2)

The drainage line is installed with a drain pump for discharging the wash water and a level detection sensor for detecting the water level of the wash water to be drained, and the reference level value Po, which is the lowest level of the wash water to be drained, exists in the drainage line. In the drainage method of a drum type washing machine with a microcomputer, which is set and a reference operation time (T), which is essentially a minimum drainage pump operation time at which the drainage pump is to be operated during the drainage administration requiring drainage during the washing operation, Stopping the drainage pump after draining the drainage pump by operating the drainage pump during the reference operation time (T) when the drainage stroke is executed; Detecting an initial water level Pi in the drain line after stopping the drain pump; Restarting the drainage pump to drain the wash water when the initial level Pi is greater than the reference level Po set in the microcomputer; During the cultivation step, the subsequent level value Pn of the washing water in the drain line is detected, and if the subsequent level value is greater than the reference level value Po, the drain pump is continuously operated to drain the water and at the same time. Detecting the subsequent water level (Pn) and stopping the operation of the drainage pump if the subsequent water level (Pn) is smaller than the reference water level (Po). The method of claim 1, wherein the drainage stroke is terminated when the initial water level Pi in the drain line is smaller than the reference water level Po after stopping the drain pump.