KR100404207B1 - Method for sensing laundry weight of drum washing machine - Google Patents

Abstract

Regardless of the quantity, it relates to the quantity detection method of the drum washing machine that can prevent excessive water consumption and excessive energy consumption in case of small load due to the constant washing time and water level control. In the method, when the user applies the operating power, setting an initial weight (Pt = 0), operating the water supply valve to supply water to a first preset water level, and wherein the water supply level is a first preset water level. Turning off the water supply valve and performing a washing stroke, determining the time of rewatering while performing the washing stroke for a predetermined time, and controlling the operation of the water supply valve according to the time of rewatering; If the washing administration execution time has passed the preset time, it comprises the step of detecting the amount of washing By controlling the water supply according to the washing time and the amount of re-water can be controlled by reducing the washing time and the amount of washing can be effectively used.

Description

Method for sensing laundry weight of drum washing machine

The present invention relates to a washing machine, and more particularly, to a method for detecting a quantity of a drum washing machine.

Generally, a washing machine is a machine for washing laundry by performing washing, rinsing, and dehydrating strokes according to a predetermined algorithm. The washing machine is classified into a pulsator type, a stirring type, a drum type, and the like according to a washing method.

At this time, as shown in FIG. 1, the drum washing machine includes a main body 1, a tub 2 fixed by a damper (not shown) inside the main body 1, and laundry into the tub 2 and a motor ( The driving force of 10) is transmitted through the belt 11 to rotate the drum 3 having a washing-related stroke, the thermistor 4 for measuring the temperature of the washing water supplied to the drum 3, and to input detergent. Detergent container (5), the water supply pipe (6) for supplying the washing water or the washing water mixed with the detergent of the detergent container (5) connected to the detergent container (5), drain pipe for discharging the washing water used in the washing stroke to the outside (7) ) Is connected to the end of the drain pipe (7) and comprises a pump (8) and a drain hose (9) for forcibly pumping the washing water.

And when looking at the operation of the drum washing machine configured as described above, first, when the user opens the door (not shown) attached to the front of the main body 1, puts the laundry, and inputs the washing command through the control panel, the washing water is the detergent container (5). Guided by the water supply pipe (6) through the) is filled in the drum (7). Subsequently, when the washing water is filled above a certain level, the motor 10 is driven and the drum 3 rotates to perform washing.

At this time, if the user selects a boiled laundry, washing is performed using high temperature wash water.

On the other hand, when the washing is completed, the pump 8 is operated so that the washing water is drained to the outside via the drain pipe 7 and the drain hose 9, and when the draining is completed, the rinsing and dehydration stroke are continuously performed, and the washing administration ends do.

Hereinafter, with reference to the accompanying drawings, the detection amount of the drum washing machine according to the prior art as follows.

As shown in FIG. 2, a method of detecting a quantity of a drum washing machine according to the related art, first, when a user opens a door of a drum washing machine and inputs laundry, and then inputs a washing instruction, a controller (not shown) of the drum washing machine is used. Before performing the washing stroke, the washing water is supplied to a predetermined level in order to detect a quantity of water (S11).

Subsequently, the motor 10 is stirred left / right at a constant speed (50 rpm) (S12), and the water level is sensed (S13) to determine whether re-water supply is necessary (S14).

And if the determination result (S14), if re-watering is necessary, re-watering is performed and the number of times is counted (S15).

Subsequently, it is determined whether the set time, that is, the time limit for the quantity detection operation has been reached (S16), and if the set time has not been reached, the steps S12 to S15 are repeated to continue counting the number of times of refilling. If it reaches, the quantity of water is determined by the number of times of refilling (S17).

At this time, the washing water supplied by the left and right stirring by the motor 10 soaks into the washing cloth and the water level is lower than the initial water level. It is to perform a dose detection by measuring.

Then, the washing water is supplied by washing water corresponding to the amount determined in the determination step (S17) (S18).

In this case, since the amount of water absorption varies depending on the type of laundry cloth, the number of times of re-watering may be affected. In other words, even the same amount of laundry cloth can be detected as a different amount of re-watering is different depending on the type.

As described above, the amount of detection of the drum washing machine according to the prior art has the following problems.

First, it does not control the washing time irrespective of the quantity, so excessive energy consumption occurs in small loads.

Second, constant water level control causes excessive water consumption at light loads.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and a method of detecting a quantity of a drum washing machine that can prevent excessive water consumption and excessive energy consumption in a small load due to a constant washing time and water level control regardless of the quantity. The purpose is to provide.

1 is a view showing the configuration of a general drum washing machine

2 is a flowchart illustrating a method for detecting a quantity of drum washing machine according to the related art.

Figure 3 is a flow chart illustrating a method for detecting the amount of drum washing machine according to the present invention

Figure 4 is a graph showing the relationship between the weight and weight of the drum washing machine according to the present invention

In accordance with an embodiment of the present invention, there is provided a drum washing machine according to the present invention for detecting a quantity of a drum washing machine having a water supply valve. When a user applies operating power, an initial weight (Pt = 0) is set. Operating a water supply valve to supply water to a first predetermined water level; turning off the water supply valve and performing a washing stroke when the water supply level is equal to or greater than the first predetermined water level; Determining the re-water supply time while performing for a time, and controlling the operation of the water supply valve in accordance with the re-water supply time, and detecting the amount of capacity if the washing administration execution time has passed a predetermined set time. It has its features.

Hereinafter, with reference to the accompanying drawings, described in more detail the detection method of the drum washing machine according to the present invention.

3 is a flowchart illustrating a method for detecting a quantity of a drum washing machine according to the present invention.

Referring to FIG. 3, in the drum washing machine according to the present invention, the weight Pt is set to an initial value (Pt = 0) and the water supply valve is turned on to start washing water (S10).

It is determined whether the supplied washing water is received up to a predetermined first level or higher (S20).

Subsequently, when the determination result (S20), the water level is above the first set level, the water supply valve is turned off to stop the supply of the washing water (S30).

Then, the drum is stirred to perform a washing stroke (S40).

Subsequently, it is determined whether the time for performing the washing administration has elapsed a predetermined time (10 minutes) (S50).

When the determination result (S50), the set time (10 minutes) has elapsed, it is determined whether the weight (Pt) value is less than the set value (S60).

Subsequently, when the determination result (S60), the weight (Pt) value is less than the set value, it is determined as a small dose (S70).

On the other hand, if the determination result (S60), the weight (Pt) value is more than the set value, it is determined that the amount of excess (S80).

In addition, if the determination result (S50), the set time (10 minutes) has not passed, it is determined whether the current water level is below the second set water level, which is the re-water supply level (S90).

Subsequently, when the determination result (S90), the current water level is less than the second set water level, the current washing time (Tw) is checked (S100).

Then, the weight Pt corresponding to the checked washing time Tw is extracted with reference to a previously stored table, and the weight Pt is updated (S110).

Subsequently, the water supply valve is turned on to receive the wash water again (S120).

As described above, in the drum washing machine according to the present invention, the amount of detection of the washing machine turns on the power of the washing machine and then turns off the water supply valve after performing water supply to a predetermined level.

Then, the drum is stirred to proceed with washing. At this time, the washing water is absorbed by the clothes, and the water level is lowered. After inserting into the following equation, a new weight (Pt '') is calculated.

Weight (Pt '') = current weight (Pt) + weight of resupply point (Pt ')

Resupply Point (Tw) 1 minute 2 minutes 3 minutes 4 minutes … 8 minutes 9 minutes 10 minutes Weight (Pt ') 1.5 2.5 4 3 … One 0.5 0.2

That is, after continuously updating the currently set weight Pt, the water supply valve is turned on again and the water supply to the set water level is repeated until 10 minutes of washing time elapses.

For example, if refilling is required only one minute after the initial operation of the drum washing machine, the weight (Pt '= 1.5) corresponding to the point of rewatering occurrence (Tw = 1 minute) is set to the initially set current weight value (Pt = 0). Substituting Equation 1, the new weight (Pt '' = 1.5) is calculated and updated, and the process of re-watering is repeated until 10 minutes of washing time is set.

Subsequently, if the weight (Pt '') value at the time of 10 minutes after the set washing time is smaller than the preset setting value, it is determined that the quantity is small, and the washing time and the quantity of washing are determined accordingly. Determine the washing time and the amount of washing accordingly.

At this time, the weight (Pt '') is the sum of the rewatering weights for each washing time, so if the quantity is small, the number of times of rewatering is small, and the time for washing water to penetrate the clothes is short, and the number of times of rewatering is high. There is also a lot of washing water slowly soaked because the value is relatively large, it is possible to detect the amount.

That is, as shown in FIG. 4, since the relationship between the sum of re-watering weights and the quantity is proportional, the performance of detecting the quantity is much more accurate than in the related art. Therefore, when the sum of the weights is less than or equal to a predetermined predetermined value, it can be determined as a small amount to control by reducing the washing time and the number of re-supply water.

As described above, the method for detecting the amount of drum washing machine according to the present invention can control the water supply according to the washing time so that the washing time and the amount of re-watering can be controlled to reduce the washing time and the amount of washing water. .

Claims (4)

Setting an initial weight (Pt = 0) when the user's operation command is input, watering to a first set water level, and performing a washing operation for a set time; Determining whether the water level is equal to or less than a second predetermined level during the set time, and updating the weight according to the elapsed washing time until the level is reduced to less than or equal to the second predetermined level; And Detecting the quantity of the laundry according to the weight of the set time elapsed time. delete According to claim 1, The step of updating the weight according to the elapsed washing time And loading the weight corresponding to the elapsed washing time from a pre-stored table and adding the weight to a current weight. The method of claim 1, Detecting a quantity according to the weight is Determining that the amount is small if the weight is less than or equal to a preset value; If the weight is more than the predetermined value comprises the step of determining the amount of large capacity of the drum washing machine.