KR20120008554A - Control method of washing machine and washing machine - Google Patents

Abstract

PURPOSE: A control method of a laundry machine and laundry machine are provided to reduce the amount of water for washing clothes by eliminating dehydration progress between a first washing progress and a second washing progress. CONSTITUTION: After a rising water supply progress(402) and a washing progress are executed, a control unit stops a washing tub during a preset time(406). When the preset time is over, the control unit drains the part of washing water(408). The control unit supplies water the same as the quantity of the partially supplied water(410). When a water supply progress is finished, the control unit executes a washing progress(412) and an entire quantity drainage progress(414).

Description

CONTROL METHOD OF WASHING MACHINE AND WASHING MACHINE}

The present invention relates to a washing machine.

The washing machine is a device for removing contaminants from contaminated laundry through washing, rinsing, and dehydration according to a preset algorithm. The washing machine may be classified into a vertical washing machine (full automatic washing machine) and a drum washing machine. The vertical washing machine performs washing using rotations around a vertical axis of a rotary vane and an outer tank or an inner tank (washing tank / dehydration tank). The drum washing machine performs washing by using a rotation about a horizontal axis of the drum.

Such a washing machine uses water for washing and rinsing laundry, and the amount of water consumed may vary according to the amount of laundry or the degree of contamination of the laundry. If consumers in areas with sufficient water supply want fast and strong washing regardless of the amount of water consumed, the consumers in areas with insufficient water supply should use as little water as possible prior to washing speed or efficiency. Sometimes you want to be washed.

According to one aspect it is an object to significantly reduce the amount of water consumed in the rinsing stroke to enable saving water washing.

The control method of the washing machine according to the present invention comprises: waiting for a predetermined time without draining the rinsing water in the first rinsing so that the contaminants of the rinsing water sink; Performing partial drainage to drain a part of the rinsing water when a preset time elapses; When the partial drainage is completed, the second rinsing is performed by supplying the partial drainage.

Further, the second rinse described above is the last rinse of the plurality of rinses, and the first rinse is the rinse performed just before the second rinse.

In addition, dehydration is omitted while the above-described first and second rinses are performed.

In addition, the preset waiting time described above is about 2 minutes.

In addition, the above partial drainage amount is less than 50% of the rinsing water.

Another control method for a washing machine according to the present invention includes: determining whether a water-saving washing mode is selected; If it is determined that the water saving washing mode is selected, the contaminants of the rinsing water are settled by waiting for a predetermined time without draining the rinsing water in the first rinsing; Performing partial drainage to drain a part of the rinsing water when a preset time elapses; When the partial drainage is completed, the second rinsing is performed by supplying the partial drainage.

Further, the second rinse described above is the last rinse of the plurality of rinses, and the first rinse is the rinse performed just before the second rinse.

In addition, dehydration is omitted while the above-described first and second rinses are performed.

In addition, selection of the water-saving washing mode mentioned above is performed by operation of the water-saving button provided to switch the washing mode currently in progress to water-saving washing mode.

In addition, the preset waiting time described above is about 2 minutes.

In addition, the above partial drainage amount is less than 50% of the rinsing water.

Another control method for a washing machine according to the present invention includes: determining whether a water-saving washing mode is selected; If it is determined that the water saving washing mode is selected, the intermediate dewatering in the water saving washing mode is performed differently from the intermediate dewatering in the other washing modes; If it is determined that the water saving washing mode is selected, the water saving rinsing is performed in the rinsing stroke.

In addition, the above-described water rinsing may be performed for a predetermined time without draining the rinsing water in the first rinsing so that the contaminants of the rinsing water subside; Performing partial drainage to drain a part of the rinsing water when a preset time elapses; When the partial drainage is completed, the partial drainage is performed to perform the second rinsing.

Further, the second rinse described above is the last rinse of the plurality of rinses, and the first rinse is the rinse performed just before the second rinse.

In addition, to perform the intermediate dehydration of the water-saving washing mode described above differently from the intermediate dewatering of the other washing mode, the intermediate dewatering of the water-saving washing mode is longer than that of the other washing modes.

In addition, the intermediate dehydration of the water-saving washing mode described above is different from that of the other washing modes in that the rotational speed (RPM) of the washing tank in the intermediate dewatering of the water-saving washing mode is rotated in the intermediate dewatering of the other washing mode. The speed is higher than the speed (RPM).

In addition, dehydration is omitted while the above-described first and second rinses are performed.

In addition, the increase amount of the intermediate dewatering time of the water-saving washing mode described above is determined according to the amount of laundry put into the washing machine.

In addition, the amount of increase in the intermediate dewatering time of the water-saving washing mode described above is determined according to the degree of contamination of the laundry put into the washing machine.

The apparatus may further include: a water saving button provided to switch the washing mode currently in progress to the water saving laundry mode; The selection of the water saving washing mode is made by operating the water saving button.

Washing machine according to the present invention, the water tank; A washing tank rotatably installed in the water tank; A water supply valve for supplying water to the washing tank; A drain valve for draining the water of the washing tub; In the first rinse, the drain valve is closed to wait for a predetermined time without draining the rinsing water, so that the contaminants in the rinsing water sink, and when the predetermined time elapses, the drain valve is opened to remove a part of the rinsing water. And performing a partial rinsing, and closing the drain valve and opening the water supply valve to supply the partial drainage when the partial drainage is completed, and performs a second rinsing.

In addition, the above-described second rinse is the last rinse of the plurality of rinses, and the first rinse is a rinse performed just before the second rinse.

In addition, the above-described control unit omits dehydration while the first rinsing and the second rinsing are performed.

The apparatus may further include: a water saving button provided to switch the washing mode currently in progress to the water saving laundry mode; The selection of the water saving washing mode is made by operating the water saving button.

In addition, the preset waiting time described above is about 2 minutes.

In addition, the above partial drainage amount is less than 50% of the rinsing water.

Another washing machine according to the present invention, a water tank; A washing tank rotatably installed in the water tank; A water supply valve for supplying water to the washing tank; A drain valve for draining the water of the washing tub; It is determined whether the water-washing washing mode is selected, and when it is determined that the water-washing washing mode is selected, the drain valve is closed in the first rinse to wait for a predetermined time without draining the rinsing water so that the contaminants in the rinsing water sink. When the preset time has elapsed, the drain valve is opened to drain the part of the rinsing water, and when the draining is completed, the drain valve is closed and the water supply valve is opened to supply the partially drained water to rinse the second rinse. It includes a control unit for performing.

Further, the second rinse described above is the last rinse of the plurality of rinses, and the first rinse is the rinse performed just before the second rinse.

In addition, the above-described control unit omits dehydration while the first rinsing and the second rinsing are performed.

In addition, the above-described control unit sets the intermediate dewatering time of the water-saving washing mode longer than the intermediate dewatering time of the other washing modes.

In addition, the above-described control unit sets the rotation speed (RPM) of the washing tank in the intermediate dewatering of the water-saving washing mode higher than the rotation speed (RPM) of the washing tank in the intermediate dewatering of the other washing modes.

The apparatus may further include: a water saving button provided to switch the washing mode currently in progress to the water saving laundry mode; The selection of the water saving washing mode is made by operating the water saving button.

In addition, the preset waiting time described above is about 2 minutes.

In addition, the above partial drainage amount is less than 50% of the rinsing water.

Another washing machine according to the present invention, a water tank; A washing tank rotatably installed in the water tank; A water supply valve for supplying water to the washing tank; A drain valve for draining the water of the washing tub; It is determined whether the water-saving washing mode is selected, and if it is determined that the water-saving washing mode is selected, the control unit for performing the intermediate dewatering of the water-saving washing mode more than the intermediate dewatering of the other washing mode, and to control the water-saving rinsing in the rinsing stroke of the water-saving washing mode It includes.

In addition, the above-described water rinsing may be performed for a predetermined time without draining the rinsing water in the first rinsing so that the contaminants of the rinsing water subside; Performing partial drainage to drain a part of the rinsing water when a preset time elapses; When the partial drainage is completed, the partial drainage is performed to perform the second rinsing.

Further, the second rinse described above is the last rinse of the plurality of rinses, and the first rinse is the rinse performed just before the second rinse.

In addition, the above-described control unit omits dehydration while the first rinsing and the second rinsing are performed.

In addition, the above-described control unit determines the increase amount of the intermediate dewatering time in the water-saving washing mode according to the amount of laundry put into the washing machine.

In addition, the above-described control unit determines the increase amount of the intermediate dewatering time in the water-saving washing mode according to the degree of contamination of the laundry put into the washing machine.

The apparatus may further include: a water saving button provided to switch the washing mode currently in progress to the water saving laundry mode; The selection of the water saving washing mode is made by operating the water saving button.

According to one aspect, the amount of water consumed in the rinsing stroke is greatly reduced to enable saving water washing.

1 is a cross-sectional view of a washing machine according to an embodiment of the present invention.
2 is a view showing a control system of the washing machine shown in FIG.
3 is a flowchart illustrating a control method of a washing machine according to an embodiment of the present invention.
4 is a flowchart specifically showing a rinsing stroke of the control method of the washing machine shown in FIG. 3.
5 is a flowchart illustrating a control method of a washing machine according to another embodiment of the present invention.
6 is a flowchart specifically showing a rinsing stroke of the control method of the washing machine shown in FIG. 5.
7 is a flow chart showing a washing machine control method according to another embodiment of the present invention.
8 is a flowchart illustrating a control method of a washing machine according to another embodiment of the present invention.
9 is a view showing a control system of the washing machine according to another embodiment of the present invention.
10 is a flowchart illustrating a control method of a washing machine according to another embodiment of the present invention.
11 is a view showing an input unit of a washing machine according to an embodiment of the present invention.

1 is a view showing a cross-sectional view of a washing machine according to an embodiment of the present invention. As shown in FIG. 1, a washing machine according to an embodiment of the present invention includes a water tank 11 installed inside the main body 10 to contain water (washing water or rinsing water) and an inside of the water tank 11. It includes a washing tank 12 rotatably installed to contain the cloth (W), and a pulsator 13 rotatably installed inside the washing tank 12 to generate a water flow by rotating forward or reverse. The washing machine shown in FIG. 1 is a vertical washing machine installed so that the water tank 11 and the washing tank 12 rotate about the axial direction of the washing machine. The present invention can also be applied to a drum washing machine.

The lower side of the water tank 11, the motor 14 for generating a driving force for rotating the washing tank 12 and the pulsator 13, and the driving force generated from the motor 14 to the washing tank 12 and the pulsator 13 ) Is provided with a power switching device 15 that transmits simultaneously or selectively.

The motor 14 is a direct drive type motor having a variable speed function. The motor 14 drives the driving force according to the lifting and lowering operation of the power switching device 15. 13) simultaneously or selectively. Instead of a direct drive motor, a motor that transmits power in a belt-pulley manner may be used. Reference numeral 16 denotes a hollow dewatering contraction coupled to the washing tub 12, and reference numeral 17 denotes a dewatering contraction through the water tank 11 and the dehydration shaft 16 to be connected to the pulsator 13. 16 shows the washing shaft provided in the hollow part.

In the lower side of the water tank 11, a water level detector 18 for detecting a frequency changing according to the water level is installed to detect the amount (water level) of water in the water tank 11. The water level detecting unit 18 measures the level of water stored in the washing tank 12 so that a desired amount of washing water or rinsing water can be supplied, or drains a desired amount of water (for example, a portion of the water stored). Partial drainage). In addition, a pollution degree detecting unit 106 for detecting a pollution degree of water in the water tank 11 is installed in the lower side of the water tank 11. In addition, a drain valve 102 and a drain pipe 104 for draining the water in the tank 11 to the outside of the washing machine are installed below the tank 11. Through the opening / closing control of the drain valve 102, all or part of the water in the water tank 11 may be drained out of the washing machine. In the upper part of the water tank 11, a water supply valve 19 for supplying water to the water tank 11 is provided.

2 is a view showing a control system of the washing machine shown in FIG. As shown in FIG. 2, the input unit 204, the pollution degree detecting unit 106, and the water level detecting unit 18 are connected to the input side of the control unit 202 controlling the washing operation of the washing machine so as to communicate with each other. On the output side, a motor 14, a water supply valve 19, and a drain valve 102 are connected to be operable. The input unit 204 allows the user to directly select not only the washing mode but also various other conditions related to washing (eg, washing water and rinsing water level, dehydration number, dewatering rate, rinsing number, etc.). In order to receive the user's selection and deliver it to the control unit 202. Through the operation of the input unit 204, the user can select a desired washing mode (for example, a water-saving washing mode or a general washing mode) and washing conditions. The display unit 206 is for displaying an operation state of the washing machine, etc., and is for displaying a washing mode and a progress state (elapsed time, etc.) currently selected. In addition, the display unit 206 indicates that the waiting time is a waiting time for saving water while waiting for the pollutants contained in the rinsing water to sink in the water-saving washing mode according to an embodiment of the present invention. Do not mistake it with your back. More preferably, the remaining waiting time is also displayed. The pollution degree detecting unit 106, the water level detecting unit 18, the motor 14, the water supply valve 19, and the drain valve 102 have already been described with reference to FIG. 1.

3 is a flowchart illustrating a control method of a washing machine according to an embodiment of the present invention. The control method of the washing machine shown in FIG. 3 is performed when the user selects the water saving washing mode, and water saving is performed at the rinsing stroke 304 among the washing stroke 302, the rinsing stroke 304, and the dewatering stroke 306.

The washing stroke 302 is a stroke for washing by supplying water and detergent into the water tank 11 and rotating the washing tank 12 into which laundry is put.

The rinse stroke 304 is preferably accompanied by two rinses. The number of rinses performed in the rinse stroke 304 may vary depending on the amount of laundry or the degree of contamination, the washing mode selected by the user, and the like. In the rinse stroke 304 shown in FIG. 3, the first rinse 308 and the second rinse 310 are performed in sequence, and water saving rinsing is performed in the first rinse 308 performed before the last rinse 310. Is done.

The dehydration stroke 306 is a stroke for removing the water of the laundry having been washed and rinsed, and rotates the washing tank 12 at a high speed so that the water of the laundry is released by the centrifugal force generated at that time.

4 is a flowchart specifically showing a rinsing stroke of the control method of the washing machine shown in FIG. 3. As shown in FIG. 4, in the first rinsing 308 in which water-saving rinsing is performed, after the rinsing water supply 402 and the rinsing 404 are performed, the washing tank 12 stops and waits without draining for a preset time. After a predetermined time has elapsed (406), only a part of the supplied rinsing water is drained (partial drain) 408. Here, the term "waiting" means maintaining the state in which the rinsing water is not drained for a predetermined time while the washing tank 12 and the pulsator 13 do not rotate. This atmosphere is for the contaminants in the rinsing water to sink to the bottom of the washing tank (12). If a part of the rinsing water is drained while the contaminants in the rinsing water have settled to the bottom of the washing tank 12, the contaminants that are settled at the bottom are discharged in a large amount, so that only a large amount of rinsing water has been removed from the washing tank 12. Will remain. When the drain pipe 104 is located in the lower portion of the water tank 11 as shown in FIG. 1, the effect of discharging contaminants by partial drainage after such precipitation is very large.

In the second rinse (last rinse) 310, water is supplied by the amount partially drained from the first rinse 308 previously performed (410). In the state in which the partial drainage is completed in the first rinse 308, only the rinsing water in which the considerable amount of foreign matter is removed in the water tank 11 remains, so that only the insufficient amount of water (for example, the partial drainage) is supplied to the rinse again. In this case, water is saved by the amount of rinsing water remaining without draining the first rinsing 308. This saving water comes from waiting for a predetermined amount of time to allow the contaminants to settle in the first rinse 308. When the water supply 410 is completed in the second rinse 310, the rinsing 412 and the total amount drainage 414 are performed to complete the rinsing stroke 304. The total amount of drainage means that the water in the water tank 11 is drained all at once.

As can be seen in FIG. 4, dehydration is omitted between the rinse for saving water (ie, the first rinse 308) and the last rinse (second rinse 310). That is, in the first rinse 308, partial drainage is performed and no complete drainage is required, so dehydration is not necessary.

The preset waiting time in the first rinse 308 where the water saving rinsing is performed is preferably about 2 minutes. On the other hand, this waiting time can be varied in proportion to the amount of laundry or the degree of contamination of the rinsing water. That is, if there is a lot of laundry or high pollution, increase the waiting time, and if there is little laundry or low pollution, reduce the waiting time.

In addition, it is preferable for saving water that the partial drainage amount in the first rinse 308 in which the water saving rinse is performed is as small as possible without exceeding 50% of the supplied rinsing water. This is because the more the partial drainage, the more the water saving effect is reduced. On the other hand, the partial drainage may be varied in proportion to the degree of contamination of the rinsing water (when both the water level detection unit and the pollution degree detection unit are provided). In other words, the higher the pollution, the more the amount of partially drained water, and the lower the pollution, the more the amount of partially drained water. If the contamination detection unit is not provided, the partial drainage may be varied in proportion to the amount of laundry.

5 is a flowchart illustrating a control method of a washing machine according to another embodiment of the present invention. As shown in the figure, when the rinse stroke consists of four or more rinses, water saving rinsing is performed twice at the end of the rinse stroke 504.

The washing stroke 502 is a stroke that supplies water and detergent to the water tank 11 and rotates the washing tank 12 into which the laundry is put, so that washing is performed, and a predetermined number of times during the washing stroke 502 is performed. Dehydration is accompanied.

The rinse stroke 504 is accompanied by a plurality of rinses (for example, four times), and the number of rinses performed in the rinse stroke 504 may vary depending on the amount of laundry, the degree of contamination, and the washing mode selected by the user. In the rinsing stroke 504 illustrated in FIG. 5, the first rinsing 508, the second rinsing 510, the third rinsing 512, and the fourth rinsing 514 are sequentially performed, among which a rinsing stroke 504 is performed. At the end of the water saving rinse is performed in the second rinse 510 and the third rinse 512 except for the last rinse 514. That is, the second rinsing 510 and the third rinsing 512 of FIG. 5 correspond to the first rinsing 308 of FIG. 3 described above in that the water is rinsing, and the fourth rinsing 514 of FIG. 5. This corresponds to the second rinse 310 of FIG. 3 in that this is the last rinse.

The dehydration stroke 506 is a stroke for removing the water of the laundry having been washed and rinsed, and rotates the washing tank 12 at a high speed so that the water of the laundry is released by the centrifugal force generated at that time.

FIG. 6 is a flowchart specifically showing a rinsing stroke of the control method of the washing machine shown in FIG. 5. As shown in FIG. 6, in the first rinse 510 in which water saving rinsing is not performed, water supply, rinsing, draining of whole quantity, and dehydration are performed in order. The total amount of drainage means that the water in the water tank 11 is drained all at once. In the second rinse 512, after the rinsing water supply 602 and the rinsing 604 are performed, the washing tank 12 is stopped without being drained for a preset time (606). If only a part of the rinsing water supplied is drained (partial drainage) 608. Here, the term "waiting" means maintaining the state in which the rinsing water is not drained for a predetermined time while the washing tank 12 and the pulsator 13 do not rotate. This atmosphere is for the contaminants in the rinsing water to sink to the bottom of the washing tank (12). If a part of the rinsing water is drained while the contaminants in the rinsing water sinks to the bottom of the washing tank 12, the contaminants that sink to the bottom are discharged largely, so that only a large amount of rinsing water is removed from the washing tank 12. Will remain.

In the third rinsing 514, the water is supplied by the amount partially drained from the second rinsing 512 previously performed (610). Since only the rinsing water in which the foreign substance is removed from the second rinsing 512 remains in water, when water is supplied in an insufficient amount and rinsing again, the amount of rinsing water remaining in the second rinsing 512 is not drained. Is done. This saving water is caused by waiting without draining for a predetermined time so that the contaminants may sink in the second rinse 512. When the water supply 610 is completed, the rinse 604 is performed, and the washing tank 12 is stopped without waiting for a preset time in a stopped state (614). Only part of the water is drained (partial drainage) 616. In the last rinse 516, water is supplied by the amount partially drained from the third rinse 514 previously performed (610). In the state in which the partial drainage is completed in the third rinse 514, only the rinsing water in which the substantial amount of foreign matter is removed in the water tank 11 remains, so that only the insufficient amount (for example, the partial drainage) is added to the rinse again. In this case, water saving is performed by the amount of the rinsing water remaining without being drained in the third rinsing 514. This saving water is caused by waiting without draining for a predetermined time so that the contaminants may sink in the third rinse 514. When the water supply 610 is completed in the fourth rinse 516, the rinse 612 and the total amount drainage 614 are performed to complete the rinse stroke 504. The total amount of drainage means that the water in the water tank 11 is drained all at once.

The preset waiting time in each of the second rinse 512 and the third rinse 514 where the water saving rinsing is performed is preferably about 2 minutes. On the other hand, this waiting time can be varied in proportion to the amount of laundry or the degree of contamination of the rinsing water. That is, if there is a lot of laundry or high pollution, increase the waiting time, and if there is little laundry or low pollution, reduce the waiting time.

In addition, the partial drainage amount in each of the second rinsing 512 and the third rinsing 514 where the water saving rinsing is performed is preferably as small as possible without exceeding 50% of the supplied rinsing water. This is because the more the partial drainage, the more the water saving effect is reduced. On the other hand, the partial drainage may be varied in proportion to the degree of contamination of the rinsing water (when both the water level detection unit and the pollution degree detection unit are provided). In other words, the higher the pollution, the more the amount of partially drained water, and the lower the pollution, the more the amount of partially drained water. If the contamination detection unit is not provided, the partial drainage may be varied in proportion to the amount of laundry.

7 is a flowchart illustrating a washing machine control method according to another embodiment of the present invention. As shown in FIG. 7, when the washing machine is powered on (702), the user receives a washing mode selection through the input unit 204 (704). If the user-selected washing mode is a water-saving washing mode (YES in 706), a water-saving washing operation according to embodiments of the present invention as shown in FIGS. 3 to 6 is performed (708). On the contrary, if the user-selected washing mode is not the water saving washing mode (NO in 706), the general washing operation excluding the water saving washing operation according to the embodiments of the present invention as shown in FIGS. 3 to 6 is performed (710). In this way, instead of carrying out a water-saving wash for every washing operation, it is possible to respond appropriately to the case where more water-saving and shorter washing times are required by performing water-saving washing only when necessary in response to the user's washing mode selection. have.

8 is a flowchart illustrating a control method of a washing machine according to another embodiment of the present invention. As shown in FIG. 8, the washing machine is powered on 802 and receives the user's washing mode selection via the input unit 204 (804). If the user-selected washing mode is a water-saving washing mode (YES in 806), a water-saving washing operation similar to that shown in FIGS. 3 to 6 is performed (808). In contrast, if the user-selected washing mode is not the water saving washing mode (NO in 806), the general washing operation excluding the water saving washing operation is performed (810).

The control method of the washing machine shown in FIG. 8 differs from the other control methods of the washing machine described above in that the intermediate dewatering time accompanying the washing stroke 812 of the water-saving washing mode is accompanied by the washing stroke 812 of the normal washing mode. Longer than the median dehydration time. Intermediate dehydration here means dehydration associated with the laundry stroke 812 to remove contaminated wash water from the laundry. That is, the washing process consists of a process of water supply 812a-washing 812b-draining 812c-dehydration 812d, and dehydration 812d at this time is called intermediate dehydration. In addition, the dehydration associated with the rinsing stroke for rinsing the laundry after the washing is completed can also be defined as intermediate dehydration. The quantity detection is performed prior to the washing process, and the quantity detection is for determining the optimum washing operation conditions (time, quantity, etc.) according to the amount of laundry. Such washing mode operating conditions may be automatically set by the determination of the controller 202 according to the quantity detection result, or may be set by a user's direct input. After intermediate dehydration, washing water may be resupplied and washing may be repeated. The reason for increasing the time of intermediate dehydration accompanying the washing stroke 812 more than the normal washing mode is as follows. The rinsing stroke 814 of FIG. 8 is a water saving rinse and, as mentioned earlier in FIGS. 3-6, does not perform dehydration. The rinsing effect can thus be reduced by the absence of dehydration in the water saving rinsing 814, thus further increasing the dehydration time of the washing stroke 812 to compensate for this (compared to the normal washing mode). Increasing the dehydration time in the washing stroke 812 in this way can release more water including contaminants, so that a sufficient rinsing effect is seen when the entire water saving washing mode is performed even if less dehydration is performed in the water saving rinse 814 in the future. Can be obtained.

As another method for improving the rinsing effect, instead of increasing the dehydration time longer, the rotation speed (RPM) of the washing tub 12 during dehydration may be increased faster. Increasing the rotational speed (RPM) of the washing tank 12 more quickly during dehydration can achieve a desired rinsing improvement effect without increasing the washing time. In order to obtain a better rinsing effect, both the increase in the dehydration time during dehydration and the increase in the rotational speed (RPM) of the bath may be applied.

The increase in the dehydration time or the increase in the rotational speed (RPM) of the washing tank 12 can be applied not only to the intermediate dehydration in the washing stroke, but also in the intermediate dehydration accompanying the rinsing stroke to improve the rinsing effect. For example, in the case of FIG. 6 described above, a better rinsing effect may be obtained through an increase in the dehydration time or an increase in the rotational speed (RPM) of the washing tub 12 when performing dehydration associated with the first rinsing.

In addition, instead of carrying out water-saving washing for all washing operations, the water-washing washing is performed only when necessary in response to the user's selection of the washing mode, so that the water-saving washing may be appropriately performed to meet the case where more water saving is required and shorter washing time is required. Can be.

9 is a view showing a control system of a washing machine according to another embodiment of the present invention. As shown in FIG. 9, an input unit 904, a pollution degree detection unit 106, and a water level detection unit 18 are connected to the input side of the control unit 902 that controls the overall washing operation of the washing machine so as to communicate with each other. On the output side, a motor 14, a water supply valve 19, and a drain valve 102 are connected to be operable. The input unit 904 allows the user to directly select not only the washing mode but also various other conditions related to washing (eg, the level of washing water and rinsing water, the number of times of dehydration, the rate of dehydration, the number of rinses, etc.). In order to receive the user's selection and deliver it to the control unit 902. In addition, the water saving button 904a is provided in the input unit 904. This water saving button 904a is for allowing the user to easily and quickly switch the current washing mode to the water saving washing mode at any time. That is, if the user operates the water saving button 904a while the washing machine is operating in a washing mode other than the water saving washing mode, the current washing mode is switched to the water saving washing mode. More specifically, if the operation of the water saving button 904a occurs when the washing machine is operating in a washing mode other than the water saving washing mode (for example, the normal washing mode), the washing mode is switched to the water saving washing mode and the existing washing is performed. If there is a process that is the object of water saving washing among the remaining processes that are not yet performed in the mode, only the corresponding process is performed in the water saving washing mode. The display unit 906 is for displaying an operation state of the washing machine, etc., and is for displaying a washing mode and a progress state (elapsed time, etc.) currently selected. In addition, the display unit 906 indicates that the waiting time is a waiting time for saving water while waiting for the contaminants contained in the rinsing water to sink in the water-saving washing mode according to an embodiment of the present invention. Do not mistake it with your back. More preferably, the remaining waiting time is also displayed. The pollution degree detecting unit 106, the water level detecting unit 18, the motor 14, the water supply valve 19, and the drain valve 102 have already been described with reference to FIG. 1.

10 is a flowchart illustrating a control method of a washing machine according to another embodiment of the present invention. As shown in FIG. 10, when the washing machine is powered on (1002), the user receives a general washing mode selection through the input unit 904 (1004). The general washing mode here is one example of a non-water saving washing mode. The control unit 902 controls the washing machine to start the operation of the normal washing mode (1006). If water saving selection occurs by operating the water saving button 904 while the normal washing mode is in progress (YES in 1008), the controller 902 switches the washing mode of the washing machine to the water saving washing mode (1010), and the existing washing mode. The rest of the process (that is, the normal washing mode) is performed in the water saving washing mode (1012). At this time, the process is performed in the water-saving washing mode only when there is a process that is the object of water-saving washing among the remaining processes that are not yet performed in the existing washing mode. If water saving selection by the operation of the water saving button 904 does not occur during the normal washing mode (NO in 1008), the control unit 902 continues to operate in the normal washing mode in progress (1014).

11 is a view illustrating an input unit of a washing machine according to an embodiment of the present invention. As illustrated in FIG. 11, an input unit 904 is provided at an outer upper end of the washing machine to help a user operate the washing machine. This input unit 904 is provided with a water saving button 904a as shown in FIG. 9, and a user can easily select a water saving washing mode through a simple operation of the water saving button 904.

11: tank
12: drum
14: motor
18: water level detection unit
106: pollution detection unit
19: water supply valve
102: drain valve
202, 902: control unit
204, 904: input unit
904a: water saving button

Claims (41)

In the first rinse, waiting for a predetermined time without draining the rinsing water to allow the contaminants of the rinsing water to sink;
Performing partial draining to drain a part of the rinsing water when the preset time elapses;
When the partial drainage is completed, the control method of the washing machine to perform a second rinsing by supplying as much as the partial drainage. The method of claim 1,
And wherein said second rinse is the last of a plurality of rinses, and said first rinse is a rinse performed immediately before said second rinse. The method of claim 1,
The control method of the washing machine to omit dehydration during the first rinsing and the second rinsing. The method of claim 1,
The preset waiting time is about 2 minutes. The method of claim 1,
And the partial drainage amount is less than 50% of the rinsing water. Determine whether a water saving washing mode is selected;
If it is determined that the water-saving washing mode is selected, the contaminants of the rinsing water are settled by waiting for a predetermined time without draining the rinsing water in the first rinsing;
Performing partial draining to drain a part of the rinsing water when the preset time elapses;
When the partial drainage is completed, the control method of the washing machine to perform a second rinsing by supplying as much as the partial drainage. The method according to claim 6,
And wherein said second rinse is the last of a plurality of rinses, and said first rinse is a rinse performed immediately before said second rinse. The method according to claim 6,
The control method of the washing machine to omit dehydration during the first rinsing and the second rinsing. The method according to claim 6,
The control method of the washing machine is the selection of the water-saving washing mode is made by the operation of the water-saving button provided to switch the washing mode currently in progress to the water-saving washing mode. The method according to claim 6,
The preset waiting time is about 2 minutes. The method according to claim 6,
And the partial drainage amount is less than 50% of the rinsing water. Determine whether a water saving washing mode is selected;
If it is determined that the water-saving washing mode is selected, the intermediate dewatering of the water-saving washing mode is different from that of the other washing modes;
If it is determined that the water-saving washing mode is selected, the control method of the washing machine to perform a water-saving rinsing in the rinsing stroke. The water saving rinse of claim 12,
In the first rinse, waiting for a predetermined time without draining the rinsing water to allow the contaminants of the rinsing water to sink;
Performing partial draining to drain a part of the rinsing water when the preset time elapses;
When the partial drainage is completed, the control method of the washing machine to perform a second rinsing by supplying as much as the partial drainage. The method of claim 12,
And wherein said second rinse is the last of a plurality of rinses, and said first rinse is a rinse performed immediately before said second rinse. The method of claim 12,
The control method of the washing machine, wherein the intermediate dehydration of the water-saving washing mode is different from the intermediate dehydration of the other washing mode is performed longer than the intermediate dewatering of the water-saving washing mode. The method of claim 12,
Implementing the intermediate dewatering of the water saving washing mode differently from the intermediate dewatering of the other washing mode, the rotational speed (RPM) of the washing tank in the intermediate dewatering of the water saving washing mode, the rotation speed of the washing tank in the intermediate dewatering of the other washing mode The control method of the washing machine to perform at a higher speed than (RPM). The method of claim 12,
The control method of the washing machine to omit dehydration during the first rinsing and the second rinsing. The method of claim 12,
The control method of the washing machine is the increase amount of the intermediate dewatering time of the water-saving washing mode is determined according to the amount of laundry put into the washing machine. The method of claim 12,
The control method of the washing machine is the increase amount of the intermediate dewatering time of the water-saving washing mode is determined according to the degree of contamination of the laundry put into the washing machine. The method of claim 12,
A water saving button provided to switch the washing mode currently in progress to the water saving washing mode;
The washing machine according to the water-saving washing mode is selected by operating the water-saving button. A fish tank;
A washing tank rotatably installed in the tank;
A water supply valve for supplying water to the washing tank;
A drain valve for draining the water of the washing tub;
Closing the drain valve in the first rinse to wait for a predetermined time without draining the rinsing water so that contaminants in the rinsing water sink, and opening the drain valve after the predetermined time elapses. And a control unit configured to perform partial rinsing to drain a part of the rinsing water, and when the partial draining is completed, close the drain valve, open the water supply valve, and supply water as much as the partial drainage to perform a second rinsing. The method of claim 21,
And wherein the second rinse is the last one of the plurality of rinses, and the first rinse is the rinse performed just before the second rinse. The method of claim 21, wherein the control unit,
Washing machine to omit dehydration while the first rinsing and the second rinsing is performed. The method of claim 21,
A water saving button provided to switch the washing mode currently in progress to the water saving washing mode;
The washing machine according to the water-saving washing mode is selected by operating the water-saving button. The method of claim 21,
The preset waiting time is about 2 minutes. The method of claim 21,
The partial drainage is less than 50% of the rinse water. A fish tank;
A washing tank rotatably installed in the tank;
A water supply valve for supplying water to the washing tank;
A drain valve for draining the water of the washing tub;
When it is determined that the water-saving washing mode is selected, and when it is determined that the water-saving washing mode is selected, the drain valve is closed in the first rinse and waits for a preset time without draining the rinsing water, so that the contaminants of the rinsing water are removed. When the predetermined time elapses, the drain valve is opened to drain the part of the rinsing water, and when the partial drain is completed, the drain valve is closed and the water supply valve is opened. And a control unit configured to perform a second rinsing by supplying the partial drained water. The method of claim 27,
And wherein the second rinse is the last one of the plurality of rinses, and the first rinse is the rinse performed just before the second rinse. The method of claim 27, wherein the control unit,
Washing machine to omit dehydration while the first rinsing and the second rinsing is performed. The method of claim 27, wherein the control unit,
Washing machine to set the intermediate dewatering time of the water-saving washing mode longer than the intermediate dewatering time of the other washing mode. The method of claim 27, wherein the control unit,
And setting the rotational speed (RPM) of the washing tank in the middle dewatering of the water-saving washing mode higher than the rotational speed (RPM) of the washing tank in the middle dewatering of the other washing modes. The method of claim 27,
A water saving button provided to switch the washing mode currently in progress to the water saving washing mode;
The washing machine according to the water-saving washing mode is selected by operating the water-saving button. The method of claim 27,
The preset waiting time is about 2 minutes. The method of claim 27,
The partial drainage is less than 50% of the rinse water. A fish tank;
A washing tank rotatably installed in the tank;
A water supply valve for supplying water to the washing tank;
A drain valve for draining the water of the washing tub;
It is determined whether the water saving washing mode is selected, and when it is determined that the water saving washing mode is selected, the intermediate water dehydration of the water saving washing mode is performed more than the intermediate dewatering of the other washing modes, and water saving rinsing is performed in the rinsing stroke of the water saving washing mode. Washing machine comprising a control unit to make. The water saving rinse of claim 35,
In the first rinse, waiting for a predetermined time without draining the rinsing water to allow the contaminants of the rinsing water to sink;
Performing partial draining to drain a part of the rinsing water when the preset time elapses;
The washing machine is configured to perform a second rinsing by supplying as much as the partial drainage when the partial drainage is completed. 36. The method of claim 35 wherein
And wherein the second rinse is the last one of the plurality of rinses, and the first rinse is the rinse performed just before the second rinse. The method of claim 35, wherein the control unit,
Washing machine to omit dehydration while the first rinsing and the second rinsing is performed. The method of claim 35, wherein the control unit,
And an increase amount of the intermediate dewatering time of the water-saving washing mode is determined according to the amount of laundry put into the washing machine. The method of claim 35, wherein the control unit,
And an increase amount of the intermediate dewatering time of the water-saving washing mode is determined according to the degree of contamination of the laundry put into the washing machine. 36. The method of claim 35 wherein
A water saving button provided to switch the washing mode currently in progress to the water saving washing mode;
The washing machine according to the water-saving washing mode is selected by operating the water-saving button.

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