JP6443645B2 - Drainage control method for multiple tub washing machines - Google Patents

Description

  The present invention relates to the field of washing, and more particularly to a drainage control method for a multi-tub washing machine.

  Currently, many drum-type washing machines on the market have only one washing tub. As people's awareness of hygiene increases, more and more users feel the need to wash different types of clothing separately or to quickly wash clothing in small portions.

  As people's quality of life increases, hygiene awareness is also increasing, and more and more people are washing their clothes separately, especially when washing clothes at home. When a method of washing a plurality of times using an existing washing machine is taken, it is difficult to satisfy the requirements in the washing time. When two or several washing machines are purchased and are washed separately, they are not only very wasteful of energy and water resources, but also have a large occupation space and are not suitable for home use. Therefore, when a multi-tub washing machine is used, the above-described demand can be satisfied and the problem of waste of energy, water, and space is solved.

  Chinese Patent No. 201010117002.0 discloses a control method of a washing machine, and the washing machine includes a first washing tub and a second washing tub. The method comprises: receiving a first operation command for requesting a water supply program or a drainage program to be executed in the first washing tub; and determining whether the same operation command is being executed in the second washing tub And determining that the first operation command cannot be executed when the same operation command is being executed in the second washing tub; and the same operation command requesting the water supply program or the drainage program. Preferentially determining which of the first washing tub and the second washing tub is relatively short when the first washing tub and the second washing tub are input simultaneously; And a step of executing the water supply program or the drainage program in a washing tub having a relatively short remaining washing time.

  The demand for vibration is higher because the center of gravity of a double drum washing machine is relatively high and unstable. The greater the overall mass of the washing machine, the smaller its vibration. When the dehydration program is executed, the drum rotates at a high speed and vibrations are always generated. Among these tanks, a tank having a high center of gravity generates relatively large vibrations and noises, which cause troublesomeness unnecessary for daily life. When one washing tub drains, the other washing tub may be dehydrated, but when water is drained, the vibration will only increase. If not drained first, the part of the water can show the action of the counterweight. However, when one tank is about to drain, it is often not the case that the other tank is dehydrated, so it is necessary to determine whether to wait for the other tank to drain.

  In view of this, the present invention will be described.

Chinese Patent 201010117002.0

  An object of the present invention is to overcome the deficiencies of existing technologies, provide a drainage control method for a multi-tub washing machine, and reduce vibration during dehydration.

In order to realize the object, the present invention adopts the following technical solution. In the drainage control method for a multi-tub washing machine, the multi-tub washing machine includes at least a first washing tub and a second washing tub. When the first washing tub reaches the drainage program, it is determined whether the second washing tub is dehydrated at this time, and if so, the first washing tub waits for the completion of the dehydration of the second washing tub. Drain.
If the second washing tub is not dewatered at this time, it is determined whether or not the second washing tub is drained and then drained.

In the process of waiting for completion of dehydration of the second washing tub and determining whether to drain, T _{32 is} the time until dehydration of the second washing tub, and T ₃₃ is the time required for dehydration of the second washing tub. to set the time _{T 3.} In the case of T ₃₂ + T ₃₃ <T ₃ , the first washing tub drains after completion of the dehydration of the second washing tub, otherwise the water in the first washing tub is directly discharged.

  When the first washing tub is about to drain, it is determined whether the second washing tub is draining at this time. If the second washing tub is draining at this time, the first washing tub waits for the end of drainage of the second washing tub to drain, otherwise the first washing tub drains directly.

When the first washing tub reaches a drainage program, the second washing tub to the time T ₁₂ to reach the water intake program, first washing tub compares the time T ₁₁ to reach the next drainage program. In the case of T ₁₂ <T ₁₁ , the first washing tub waits for water intake in the second washing tub, and in the case of T ₁₂ ≧ T ₁₁ , the water in the first washing tub is directly discharged.

A time T ₁₂ the second washing tub reaches a water intake program, whether the first washing tub before comparing the time T ₁₁ to reach the next drainage programs can repeatedly use the water in the first washing tub Judging. If it cannot be used repeatedly, the water in the first washing tub is drained directly, and if it can be used repeatedly, the time T ₁₂ for the second washing tub to reach the water intake program and the first washing tub in the next drainage program reach and compares the time _{T 11} to.
Or when the 1st washing tub waits for the water intake of the 2nd washing tub, it is judged whether the water of the 1st washing tub can be used repeatedly. When it cannot be used repeatedly, the water in the first washing tub is directly discharged, and when it can be used repeatedly, the water in the first washing tub is discharged into the second washing tub and the water is repeatedly used.

When the first washing tub reaches a drainage program, if the second washing tub is intake, reaching time T ₁₂ in the second washing tub intake program is 0, there is no need to wait.

Set the allowable waiting time _{T 1,} the case of T 12 _{<T 1,} the first washing tank wait for intake of the second washing _tub, the case of _{T 12} ≧ _{T 1,} water in the first washing tub is discharged directly.

  When the first washing tub reaches the drainage program, it is determined whether the second rinsing tub is executing or is about to perform the last rinse water intake. If so, the water in the first washing tub is drained directly, otherwise it is determined whether the water in the first washing tub can be used repeatedly.

  When the second washing tub reaches the drainage program, it is determined whether the first washing tub is dehydrated at this time, and if so, the second washing tub waits for the completion of the dehydration of the first washing tub and drains. To do. If the first washing tub is not dewatered at this time, it is determined whether or not the first washing tub is to be drained after waiting for the dehydration of the first washing tub to be completed.

  When the first washing tub reaches the drainage program, it is determined whether the second washing tub is operating at this time. If it is operating, it is determined whether the second washing tub is or is executing a dehydration program, and if not, the first washing tub directly executes the drainage program.

  In the drainage control method for a multi-tub washing machine, the multi-tub washing machine includes at least a first washing tub and a second washing tub. When the first washing tub reaches the drainage program, it is determined whether the second washing tub is draining or dewatering at this time, and if it is draining or dehydrating, the first washing tub is dewatering of the second washing tub. Wait for completion and start draining. If the second washing tub is not drained or dewatered at this time, the first washing tub waits for the completion of dehydration of the second washing tub and determines whether or not it is necessary to start draining.

When the first washing tub waits for the completion of the dehydration of the second washing tub and determines whether or not it is necessary to start drainage, the time until drainage of the second washing tub is T ₃₁ , The required time is T ₃₄ , the required time for dehydration of the second washing tub is T ₃₃ , and the time until the next drainage of the first washing tub is T ₅ . If T ₅ <T ₃₁ + T ₃₄ , the water in the first washing tub is drained directly, otherwise the first washing tub needs to wait for completion of dehydration in the second washing tub and start draining Continue to judge.

When the first washing tub waits for the completion of the dehydration of the second washing tub and determines whether or not it is necessary to start drainage, the time until drainage of the second washing tub is T ₃₁ , The required time is T ₃₄ , the required time for dehydration of the second washing tub is T ₃₃ , and an allowable waiting time T ₃ is set. In the case of T ₃₁ + T ₃₄ + T ₃₃ <T ₃ , the first washing tub waits for completion of dehydration of the second washing tub and drains, otherwise the first washing tub drains directly.

  When the first washing tub reaches the drainage program, it is first determined whether the second washing tub is operating at this time. If not, the first washing tub executes the drainage program directly, and if it is running, it continues to determine whether the second washing tub is draining or dewatering at this time.

  When it is determined that the first washing tub waits for the dehydration of the second washing tub to be completed, it is determined whether water needs to be taken after the second washing tub has completed the dehydration. When it is not necessary to take water, the water in the first washing tub is directly discharged. When it is necessary to take water, it is determined whether the water in the first washing tub can be repeatedly used. If it can be used repeatedly, the water in the first washing tub is drained into the second washing tub.

  When the first washing tub reaches the drainage program, if the second washing tub is taking water, it is determined whether the water in the first washing tub can be used repeatedly, and if it can be used repeatedly, The water in the first washing tub is discharged into the second washing tub.

  When the second washing tub is running or is about to be run, the water in the first washing tub cannot be used repeatedly.

  If the first washing tub is the last rinse drain, the water in the first washing tub cannot be used repeatedly.

  When the first washing tub is drained, it is in the washing state, when the second washing tub is withdrawn, in the rinse state, or when the first washing tub is drained and when the second washing tub is withdrawn, both are in the washing state The number of washings in the first washing tub is less than the number of washings in the second washing tub, or the first washing tub is in a rinse state when draining the first washing tub and when the second washing tub is taking water. If the number of times is less than the number of times the second washing tub is rinsed or the turbidity of the water in the first washing tub exceeds a set value, the water in the first washing tub cannot be used repeatedly.

  When the second washing tub reaches the drainage program, it is determined whether the first washing tub is draining or dewatering at this time. When draining or dewatering, the second washing tub waits for completion of dehydration of the first washing tub and starts draining. If the first washing tub is not drained or dewatered at this time, the second washing tub waits for completion of dehydration of the first washing tub and determines whether it is necessary to start draining.

Employing the above technical solution of the present invention brings about the following beneficial effects.
1. When one washing tub of the washing machine of the present invention drains, if the other washing tub is dehydrated or dehydrated within a certain time, the first washing tub is drained first. First, increase the weight of the washing machine to achieve a seismic reduction effect. When one washing tub reaches the drainage program, if another washing tub is draining or dewatering, or if draining or dehydrating within a certain time, the first washing tub is not drained first and the washing machine Increase the weight of the. When the second washing tub is dehydrated, the counterweight is increased and a seismic reduction effect is realized.

  2. The present invention adds a process for judging that the water is drained after dehydration. The operation process of the two washing tubs is rationally adjusted to achieve the maximum vibration reduction effect.

  3. Based on the waiting time for drainage, the present invention determines whether or not to repeatedly use the water by discharging it to another tank when the drainage program is reached. It has simple judgment and control logic, and in the actual washing program, the control stability is relatively high. Furthermore, it is possible to sufficiently use water repeatedly, has high practical value, and can be applied more effectively and widely.

  4. The present invention accurately determines the situation where water cannot be used repeatedly, and guarantees the washing effect.

  Hereinafter, a specific implementation method of the present invention will be described in more detail with reference to the drawings.

FIG. 1 is a structural diagram of a double drum washing machine of the present invention. FIG. 2 is a flowchart of the control method of the present invention. FIG. 3 is a flowchart of a control method according to another embodiment of the present invention. FIG. 4 is a flowchart of a control method according to another embodiment of the present invention. FIG. 5 is a flowchart of a control method according to another embodiment of the present invention. FIG. 6 is a flowchart of a control method according to another embodiment of the present invention.

  As shown in FIG. 1, the double drum washing machine includes a first washing tub 1 and a second washing tub 2 that can independently execute a washing process for clothes. The first washing tub 1 and the second washing tub 2 can independently execute a water intake program, a washing program, a drainage program, a rinsing program, and a dehydration program in order for clothes, thereby washing the clothes. Achieve the goal. Preferably, a drying device can be attached to each of the first washing tub and the second washing tub. After the dehydration program, the drying program is executed to dry clothes in the first washing tub and / or the second washing tub. To achieve the goal. Preferably, a first heating device for heating the internal washing water is provided in the first washing tub, and a second heating device for heating the internal washing water is provided in the second washing tub. Therefore, in the process of executing the washing program, the washing water in the corresponding washing tub is heat-treated to control the water temperature in the washing process of the clothes, thereby enhancing the washing effect.

  In the present invention, the first washing tub is connected to the second washing tub, and the water in the first washing tub is discharged to the second washing tub when a certain condition is satisfied and can be repeatedly used. Is discharged to the first washing tub when a certain condition is satisfied, and can be used repeatedly. If the conditions for repeated use are not met, it will be discharged directly from the drain. Increase water utilization, prevent waste of water source, and add a control process to ensure that the water is not repeatedly used unless it is relatively clean and to ensure a washing effect.

Example 1
As shown in FIG. 1, when the first washing tub reaches the drainage program, the control method for the multiple tub washing machine according to the present embodiment determines whether the second washing tub is dehydrated at this time. If so, the first washing tub drains after completion of the dehydration of the second washing tub. The water in the first washing tub exhibits the action of a counterweight, can increase the weight of the washing machine, and realizes the effect of vibration reduction.

  If the second washing tub is not dehydrated at this time, the process waits for the completion of dehydration and determines whether to drain. In the situation where the first washing tub has just finished draining and the second washing tub starts dewatering immediately, the water in the first washing tub cannot show the effect of vibration reduction and is prevented from being wasted. can do.

In the process of waiting for completion of dehydration and determining whether to drain, T _{32 is set} as the time until dehydration of the second washing tub, T ₃₃ is set as the time required for dehydration of the second washing tub, and an allowable waiting time T ₃ is set. To do. In the case of T ₃₂ <T ₃ -T ₃₃ , it is described that it is within the range of the allowable waiting time, and the first washing tub drains after completing the dehydration of the second washing tub. Otherwise, the water in the first washing tub is drained directly.

  Since the drainage ports of the first and second washing tubs are connected to the drainage port of the washing machine via a pipeline, the entire washing machine has only one drainage port. If the two washing machines drain simultaneously, the washing water may flow back due to the pressure difference, resulting in contamination of clothing. Moreover, when one drain pipe is shared, the speed | rate discharged simultaneously and the speed | rate discharged | emitted each are substantially the same. Therefore, the 1st washing tub and the 2nd washing tub cannot drain simultaneously. When the first washing tub is about to drain, it is determined whether the second washing tub is draining at this time. If the second washing tub is draining at this time, the first washing tub waits for the end of drainage of the second washing tub to drain, otherwise the first washing tub drains directly.

  Since the water in the first washing tub is repeatedly used, it is determined whether the water in the first washing tub can be used repeatedly when the first washing tub reaches the drainage program. If it cannot be used repeatedly, the water in the first washing tub is directly discharged, and if it can be used repeatedly, it is determined whether the second washing tub is taking water. When taking water, the water of the 1st washing tub is discharged to the 2nd washing tub, and water is used repeatedly. When not taking water, it is judged whether the 1st washing tub waits for the 2nd washing tub to take water.

Regarding the process of determining whether the first washing tub waits for the second washing tub to take water, the time T ₁₂ for the second washing tub to reach the water intake program, and the time T ₁₁ for the first washing tub to reach the next drainage program; Compare When T ₁₂ <T ₁₁ , the first washing tub waits for water intake in the second washing tub, discharges the water in the first washing tub to the second washing tub, and repeatedly uses the water. When T ₁₂ ≧ T ₁₁ , the water in the first washing tub is directly discharged.

In the above determination process, the waiting time may be relatively long, and at this time, an allowable waiting time T ₁ (T ₁ <T ₁₁ ) can be set. If T ₁₂ <T ₁ , it is described as being within the allowable waiting time, the first washing tub waits for water in the second washing tub, drains the water in the first washing tub to the second washing tub, Use water repeatedly. In the case of T ₁₂ ≧ T ₁ , it is explained that it is not within the range of the allowable waiting time, and the water in the first washing tub is directly discharged.

  When determining whether the water in the first washing tub can be used repeatedly, the turbidity value or foam concentration value of the water in the first washing tub is measured. If the turbidity value or foam concentration value is smaller than the set value, the water in the first washing tub can be used repeatedly, otherwise the water in the first washing tub cannot be used repeatedly and is discharged directly. .

  When the first washing tub reaches the drainage program, it is determined whether the second rinsing tub is executing or is about to perform the last rinse water intake. If so, the water in the first washing tub is drained directly, otherwise it is determined whether the water in the first washing tub can be used repeatedly.

  The first washing tub and the second washing tub are only numbers given for convenience of explanation. It is also possible to determine whether the first washing tub is dehydrated at this time when the second washing tub drains without assigning an order relationship. In the case of dehydration, the second washing tub drains after waiting for completion of dehydration of the first washing tub. The water in the second washing tub exhibits the action of a counterweight, can increase the weight of the washing machine, and realizes the effect of vibration reduction.

  If the first washing tub is not dehydrated at this time, it is determined whether or not to drain after waiting for completion of dehydration. In the situation where the second washing tub has just finished draining and the first washing tub starts dewatering immediately, the water in the second washing tub cannot show the effect of vibration reduction and is prevented from being wasted. can do.

  When the first washing tub reaches the drainage program, it is determined whether the second washing tub is operating at this time. If it is operating, it is determined whether the second washing tub is or is executing a dehydration program, and if not, the first washing tub directly executes the drainage program.

As shown in FIG. 2, the control method of the present embodiment is as follows.
1) The first washing tub reaches the drainage program.
2) It is determined whether the second washing tub is in operation. If it is in operation, step 3) is executed, and if it is not in operation, step 8) is executed.
3) It is determined whether or not the second washing tub is drained, and if not drained, step 4) is performed, and if drained, step 7) is performed.
4) It is determined whether or not the second washing tub is dehydrated. If it is not dehydrated, step 5) is executed. If it is dehydrated, step 6) is executed.
5) The time until dehydration of the second washing tub is T ₃₂ , the time required for dehydration of the second washing tub is T ₃₃ , and an allowable waiting time T ₃ is set. If T ₃₂ <T ₃ −T ₃₃ , perform step 6), otherwise perform step 8).
6) The first washing tub waits for the end of dehydration of the second washing tub, and proceeds to step 8).
7) The first washing tub waits for the drainage of the second washing tub to end and proceeds to step 8).
8) Drain the first washing tub.

Example 2
As shown in FIG. 5 and FIG. 6, in the drainage control method for the multiple tub washing machine of this embodiment, when the first washing tub reaches the drainage program, is the second washing tub drained or dehydrated at this time? Judge whether. When draining or dewatering, the first washing tub waits for completion of dehydration of the second washing tub and drains. When the water in the first washing tub is retained in the first washing tub during the dehydration of the second washing tub, the water in the first washing tub exhibits a counterweight action and may increase the weight of the washing tub. It is possible to realize the effect of vibration reduction. That is, the drainage program and the dehydration program for the second washing tub are continuously executed, and no other program is executed between the drainage program and the dehydration program.

  If the second washing tub is not drained or dewatered at this time, the first washing tub waits for the completion of the dehydration of the second washing tub and determines whether to drain. If the second washing tub is about to dehydrate immediately, the first washing tub can wait for completion of dehydration of the second washing tub and drain the water. In the situation where the first washing tub has just finished draining, or in the situation where the first washing tub has just finished draining and the second washing tub starts dewatering immediately, the water in the first washing tub is reduced in vibration. An effect cannot be shown and it can prevent wasting. When the water in the first washing tub is kept in the first washing tub when the second washing tub is dehydrated, the water in the first washing tub exhibits the action of a counterweight and may increase the weight of the washing machine. It is possible to realize the effect of vibration reduction.

For the first washing tub to wait for the completion of the dehydration of the second washing tub and determine whether it is necessary to start drainage, T _{31 is} the time until drainage of the second washing tub, drainage of the second washing tub Is T ₃₄ , T _{33 is} the time required for dehydration of the second washing tub, and T ₅ is the time until the next drainage of the first washing tub. In the case of T ₅ <T ₃₁ + T ₃₄ , the water in the first washing tub is directly discharged, and when the next drainage of the first washing tub, the water in the first washing tub is used to reduce the dehydration. Otherwise, the first washing tub waits for the completion of dehydration of the second washing tub, and continues to determine whether or not it is necessary to start draining. When the first washing tub always drains after the completion of the dehydration of the second washing tub, the washing time of the first washing tub becomes longer, but this can be prevented. When the next drainage of the first washing tub can be performed before the dehydration of the second washing tub, the current drainage of the first washing tub must basically wait for the completion of the dehydration of the second washing tub Absent. If the water at the time of the next drainage of the 1st washing tub is kept in the 1st washing tub, the water in the 1st washing tub shows the action of a counterweight, and can increase the weight of a washing machine, and it is vibration-proof. Realize the effect.

In the process of waiting for completion of dewatering and determining whether to drain, T _{31 is} the time to drain the second washing tub, T _{34 is} the time to drain the second washing tub, time and _{T 33,} a permissible waiting time _{T 3.} If T ₃₁ + T ₃₄ + T ₃₃ <T ₃ , it is described as being within the allowable waiting time range, the first washing tub drains after completion of dehydration of the second washing tub, otherwise the first washing The tank water is discharged directly. When the allowable waiting time is set and the drainage waiting time of the first washing tub exceeds the set allowable waiting time, the first washing tub does not wait for the end of dehydration of the second washing tub. It is possible to prevent the time for the first washing tub to wait for drainage and to increase the washing time of the first washing tub, and rationally adjust the washing process of the two washing tubs.

  When the first washing tub reaches the drainage program, it is determined whether the second washing tub is operating at this time. If it is operating, it is determined whether the second washing tub is running or is about to run a drainage or dehydration program, and if not, the first washing tub runs the drainage program directly.

  Since the drainage ports of the first and second washing tubs are connected to the drainage port of the washing machine via a pipeline, the entire washing machine has only one drainage port. If the two washing machines drain simultaneously, the washing water may flow back due to the pressure difference, resulting in contamination of clothing. Moreover, when one drain pipe is shared, the speed | rate discharged simultaneously and the speed | rate discharged | emitted each are substantially the same. Therefore, the 1st washing tub and the 2nd washing tub cannot be discharged simultaneously. Furthermore, the drainage program and the dehydration program for the second washing tub are continuously executed, and no other program is executed between the drainage program and the dehydration program. When the first washing tub is about to drain, it is determined whether the second washing tub is draining at this time. If the second washing tub is draining at this time, the first washing tub waits for the end of the dehydration of the second washing tub to drain, otherwise the first washing tub drains directly.

  Vibrations are likely to occur during dehydration, especially if the distribution of clothing is uneven, the vibrations are greater and noise is likely to occur. Furthermore, if the vibration is too large, the connection of the parts of the washing machine tends to be loosened, resulting in a failure. In the present invention, since two washing tubs are installed, when one washing tub is dehydrated, the weight of the washing machine can be increased by the water in the other washing tub and vibration can be reduced. When the first washing tub is about to drain, it is determined whether the second washing tub is dehydrated at this time, and if the second washing tub is dehydrated at this time, the first washing tub is After the dehydration is completed, the water is drained to reduce vibrations that occur when the second washing tub is dehydrated.

  Furthermore, the water in the washing tub can be used repeatedly. When it is determined that the first washing tub waits for the dehydration of the second washing tub to be completed, it is determined whether water needs to be taken after the second washing tub has completed the dehydration. When it is not necessary to take water, the water in the first washing tub is directly discharged. When it is necessary to take water, it is determined whether the water in the first washing tub can be repeatedly used. If it can be used repeatedly, the water in the first washing tub is drained into the second washing tub.

  When the first washing tub reaches the drainage program, if the second washing tub is taking water, it is determined whether the water in the first washing tub can be used repeatedly. If it can be used repeatedly, the water in the first washing tub is drained into the second washing tub.

  When the first washing tub is drained, it is in the washing state, when the second washing tub is withdrawn, in the rinse state, or when the first washing tub is drained and when the second washing tub is withdrawn, both are in the washing state The number of washings in the first washing tub is less than the number of washings in the second washing tub, or the first washing tub is in a rinse state when draining the first washing tub and when the second washing tub is taking water. If the number of times is less than the number of times the second washing tub is rinsed or the turbidity of the water in the first washing tub exceeds a set value, the water in the first washing tub cannot be used repeatedly.

  When determining whether the water in the first washing tub can be used repeatedly, the turbidity value or foam concentration value of the water in the first washing tub is measured. If the turbidity value or foam concentration value is smaller than the set value, the water in the first washing tub can be used repeatedly, otherwise the water in the first washing tub cannot be used repeatedly and is discharged directly. .

  When the first washing tub reaches the drainage program, it is determined whether the second rinsing tub is executing or is about to perform the last rinse water intake. If so, the water in the first washing tub is drained directly, otherwise it is determined whether the water in the first washing tub can be used repeatedly.

  When the first washing tub reaches the drainage program, it is determined whether the first washing tub is the last rinse drain. If it is the last rinse drainage, the water in the first washing tub is directly discharged, and if it is not the last rinse drainage, it is determined whether the water in the first washing tub can be used repeatedly. The last rinse may add softener or disinfectant, etc., but the second washing tub may not require this process, thus preventing affecting the clothing in the second washing tub . If it is the last rinse drain, the water in the first washing tub is drained directly.

  The first washing tub and the second washing tub are only numbers given for convenience of explanation. Without assigning an order relationship, when the second washing tub drains, it can also be determined whether the first washing tub is draining or dewatering at this time. When draining or dewatering, the second washing tub drains after the dehydration of the first washing tub is completed. The water in the second washing tub exhibits the action of a counterweight, can increase the weight of the washing machine, and realizes the effect of vibration reduction.

  If the first washing tub is not drained or dewatered at this time, the second washing tub waits for the first washing tub to be dehydrated and determines whether to drain. In the situation where the second washing tub has just finished draining and the first washing tub starts dewatering immediately, the water in the second washing tub cannot show the effect of vibration reduction and is prevented from being wasted. can do.

The control method of the present embodiment is as follows.
1) The first washing tub reaches the drainage program.
2) It is determined whether the second washing tub is in operation. If it is in operation, step 3) is executed, and if it is not in operation, step 6) is executed.
3) It is determined whether or not the second washing tub is drained. If not drained, step 4) is performed. If drained, step 5) is performed.
4) It is determined whether or not the second washing tub is dehydrated. If it is not dehydrated, step 6) is executed. If it is dehydrated, step 5) is executed.
5) The first washing tub waits for the end of dehydration of the second washing tub and proceeds to step 6).
6) Drain the first washing tub.

The other control method of the present embodiment is as follows.
1) The first washing tub reaches the drainage program.
2) It is determined whether or not the second washing tub is in operation. If it is in operation, step 3) is executed, and if it is not in operation, step 7) is executed.
3) It is determined whether or not the second washing tub is drained, and if not drained, step 4) is performed, and if drained, step 6) is performed.
4) It is determined whether or not the second washing tub is dehydrated. If it is not dehydrated, step 5) is executed. If it is dehydrated, step 6) is executed.
5) T ₃₁ time to the waste water in the second washing _tank, T ₃₄ the duration of drainage in the second washing _tub, the time required for the dehydration of the second washing tub T _33, until the next draining the first washing tub the time and _{T 5.} If T ₅ <T ₃₁ + T ₃₄ , perform step 7), otherwise perform step 6).
6) The first washing tub waits for the end of dehydration of the second washing tub, and proceeds to step 7).
7) Drain the first washing tub.

The other control method of the present embodiment is as follows.
1) The first washing tub reaches the drainage program.
2) It is determined whether or not the second washing tub is in operation. If it is in operation, step 3) is executed, and if it is not in operation, step 7) is executed.
3) It is determined whether or not the second washing tub is drained, and if not drained, step 4) is performed, and if drained, step 6) is performed.
4) It is determined whether or not the second washing tub is dehydrated. If it is not dehydrated, step 5) is executed. If it is dehydrated, step 6) is executed.
5) The allowable waiting time T ₃ is set with T ₃₁ as the time until drainage of the second washing tub, T ₃₄ as the time required for draining the second washing tub, and T _{33 as the} time required for dehydration of the second washing tub. . If T ₃₁ + T ₃₄ + T ₃₃ <T ₃ , perform step 6), otherwise perform step 7).
6) The first washing tub waits for the end of dehydration of the second washing tub, and proceeds to step 7).
7) Drain the first washing tub.

The other control method of the present embodiment is as follows.
1) The first washing tub reaches the drainage program.
2) It is determined whether the second washing tub is in operation. If it is in operation, step 3) is executed, and if it is not in operation, step 8) is executed.
3) It is determined whether or not the second washing tub is drained, and if not drained, step 4) is performed, and if drained, step 7) is performed.
4) It is determined whether or not the second washing tub is dehydrated. If it is not dehydrated, step 5) is executed. If it is dehydrated, step 7) is executed.
5) T ₃₁ time to the waste water in the second washing _tank, T ₃₄ the duration of drainage in the second washing _tub, the time required for the dehydration of the second washing tub T _33, until the next draining the first washing tub the time and _{T 5.} If T ₅ <T ₃₁ + T ₃₄ , perform step 8), otherwise perform step 6).
6) The allowable waiting time T ₃ is set with T ₃₁ as the time until drainage of the second washing tub, T ₃₄ as the time required for draining the second washing tub, and T _{33 as the} time required for dehydration of the second washing tub. . If T ₃₁ + T ₃₄ + T ₃₃ <T ₃ , perform step 7), otherwise perform step 8).
7) The first washing tub waits for the end of dehydration of the second washing tub and proceeds to step 8).
8) Drain the first washing tub.

The other control method of the present embodiment is as follows.
1) The first washing tub reaches the drainage program.
2) It is determined whether or not the second washing tub is in operation. If it is in operation, step 3) is executed, and if it is not in operation, step 12) is executed.
3) It is determined whether or not the second washing tub is drained, and if not drained, step 4) is performed, and if drained, step 7) is performed.
4) It is determined whether or not the second washing tub is dehydrated. If it is not dehydrated, step 5) is executed. If it is dehydrated, step 7) is executed.
5) T ₃₁ time to the waste water in the second washing _tank, T ₃₄ the duration of drainage in the second washing _tub, the time required for the dehydration of the second washing tub T _33, until the next draining the first washing tub the time and _{T 5.} If T ₅ <T ₃₁ + T ₃₄ , perform step 8), otherwise perform step 6).
6) The allowable waiting time T ₃ is set with T ₃₁ as the time until drainage of the second washing tub, T ₃₄ as the time required for draining the second washing tub, and T _{33 as the} time required for dehydration of the second washing tub. . If T ₃₁ + T ₃₄ + T ₃₃ <T ₃ , perform step 7), otherwise perform step 8).
7) The first washing tub waits for the end of dehydration of the second washing tub and proceeds to step 8).
8) The first washing tub prepares drainage.
9) It is determined whether or not the second washing tub takes water. If water is taken, step 10) is executed, and if water is not taken, step 12) is executed.
10) It is determined whether or not the water in the first washing tub can be repeatedly used. If the water can be used, step 11) is executed. If the water cannot be used, step 12) is executed.
11) Drain the water from the first washing tub to the second washing tub and use it repeatedly.
12) Drain the water from the first washing tub.

Example 3
The control method of the present embodiment adds a process of repeatedly using the water in the first washing tub. As shown in FIG. 3, this embodiment employs the drainage waiting time as a criterion for determining whether or not to use water repeatedly. Based on the drainage waiting time, when the drainage program is reached, wait for the water to drain into another tank and determine whether to use it repeatedly. It has simple judgment and control logic, and in the actual washing program, the control stability is relatively high. Furthermore, it is possible to sufficiently use water repeatedly, has high practical value, and can be applied more effectively and widely.

A control method for repeatedly using water when the first washing tub and the second washing tub are simultaneously in operation is as follows.
In the control method of repeatedly using water from a plurality of tank washing machines, the plurality of tank washing machines include at least a first washing tank and a second washing tank. When the first washing tub and the second washing tub is in operation at the same time, if the first washing tub reaches a drainage program, a time T ₁₂ to the second washing tub reaches a water intake program, first washing tub next drainage Compare the time T ₁₁ to reach the program. In the case of T ₁₂ <T ₁₁ , the first washing tub waits for water intake in the second washing tub, and in the case of T ₁₂ ≧ T ₁₁ , the water in the first washing tub is directly discharged.

A time T ₁₂ the second washing tub reaches a water intake program, whether the first washing tub before comparing the time T ₁₁ to reach the next drainage programs can repeatedly use the water in the first washing tub Judging. If it cannot be used repeatedly, the water in the first washing tub is drained directly, and if it can be used repeatedly, the time T ₁₂ for the second washing tub to reach the water intake program and the first washing tub in the next drainage program reach and compares the time _{T 11} to.
Or when the 1st washing tub waits for the water intake of the 2nd washing tub, it is judged whether the water of the 1st washing tub can be used repeatedly. When it cannot be used repeatedly, the water in the first washing tub is directly discharged, and when it can be used repeatedly, the water in the first washing tub is discharged into the second washing tub and the water is repeatedly used.

Specifically, Step 1: When the first washing tub reaches the drainage program, it is determined whether or not the water in the first washing tub can be repeatedly used. If it can be used repeatedly, step 2 is executed, and if it cannot be used repeatedly, the water in the first washing tub is directly discharged.
Step 2: The second washing tub to the time T ₁₂ to reach the water intake program, first washing tub compares the time T ₁₁ to reach the next drainage program. When T ₁₂ <T ₁₁ , the first washing tub waits for water intake in the second washing tub, discharges the water in the first washing tub to the second washing tub, and repeatedly uses the water. When T ₁₂ ≧ T ₁₁ , the water in the first washing tub is directly discharged. A process of determining whether to wait is added, the probability of repeatedly using the water in the first washing tub is greatly increased, and more water can be used repeatedly.

In Step 1, when the first washing tub reaches a drainage program, if the second washing tub is intake, reaching time T ₁₂ in the second washing tub intake program is 0, it is not necessary to wait, the The water in one washing tub is drained into the second washing tub, and the water is used repeatedly. A time T ₁₂ the second washing tub reaches a water intake program, before the first washing tub to compare the time T ₁₁ to reach the next drainage program, second washing tank earlier run this time water intake program It can also be determined whether or not. If the second washing tub does not run the water intake program, the second washing tub to the time T ₁₂ to reach the water intake program, first washing tub compares the time T ₁₁ to reach the next drainage program.

In step 2, an allowable waiting time T ₁ (T ₁ <T ₁₁ ) is set, and when T ₁₂ <T ₁ , the first washing tub waits for the second washing tub to take water, 2 Drain into the washing tub and use water repeatedly. When T ₁₂ ≧ T ₁ , the water in the first washing tub is directly discharged. By this step, the first washing tub can be prevented from waiting for a long time, and the repeated use of water is rationally adjusted on the assumption that the washing time of the first washing tub is guaranteed. The first washing tub does not waste much time because it only considers using water repeatedly. When the washing machine determines that the waiting time is long and exceeds the set allowable waiting time, the water in the first washing tub is not repeatedly used. This judgment made the repeated use of water more rational, and adjusted the relationship between waiting time and repeated use of water to the maximum.

  In step 1, the turbidity value or foam concentration value of water in the first washing tub is measured. If the turbidity value or foam concentration value is smaller than the set value, the water in the first washing tub can be used repeatedly, otherwise the water in the first washing tub cannot be used repeatedly and is discharged directly. . Water can be used repeatedly only when the turbidity value or foam concentration value of the water is within the set range.

  In Step 1, when the first washing tub reaches the drainage program, it is determined whether the second rinsing tub is executing or is about to execute the last rinse water intake. If so, the water in the first washing tub is drained directly, otherwise it is determined whether the water in the first washing tub can be used repeatedly. The final rinse water intake ensures clean water intake and the effect after the clothes are washed.

  In step 2, when the water in the first washing tub is discharged to the second washing tub, it is determined whether the second washing tub executes a washing water intake program. When the washing water intake program is executed, the second washing tub first performs the water removal to wash away the detergent case, and after finishing the water intake to wash away the detergent case in the second washing tub, the water in the first washing tub is supplied to the second washing tub. To discharge. When the washing water intake program is not executed, the water in the first washing tub is directly discharged to the second washing tub.

  In step 2, when the water in the first washing tub is discharged to the second washing tub, the height of the water level in the second washing tub is measured. When the water level in the second washing tub reaches the set water level value, if there is still water in the first washing tub, the remaining water in the first washing tub is directly discharged. After draining all the water in the first washing tub into the second washing tub, if the water level in the second washing tub has not yet reached the set water level value, clean water from the external water intake to the second washing tub Take water.

When the water in the first washing tub is directly discharged, it is determined whether or not the second washing tub is currently executing the dehydration program. When the dehydration program is executed, the first washing tub drains after waiting for the dehydration of the second washing tub to be completed. When the dehydration program is not executed, the time until dehydration of the second washing tub is T ₃₂ , the time required for dehydration of the second washing tub is T ₃₃ , and an allowable waiting time T ₃ is set. In the case of T ₃₂ + T ₃₃ <T ₃ , the first washing tub drains after completion of the dehydration of the second washing tub, otherwise the water in the first washing tub is directly discharged.

  By determining the washing state and the number of times of washing, it can also be determined that the water in the first washing tub can be used repeatedly. In step 1, when the first washing tub is drained, in a washing state, when the second washing tub is withdrawn, in a rinse state, or when both the first washing tub is drained and when the second washing tub is withdrawn In the washing state, the number of washings in the first washing tub is less than the number of washings in the second washing tub, or the first washing tub is drained and the second washing tub is in the rinsing state. When the number of rinses in the washing tub is less than the number of rinses in the second washing tub, the water in the first washing tub cannot be used repeatedly.

  When the second washing tub reaches the drainage program, it is determined whether the water in the second washing tub can be repeatedly used. If it can be used repeatedly, the time for the first washing tub to reach the water intake program is compared with the time for the second washing tub to reach the next drainage program, and until the first washing tub executes the water intake program, 2. Determine whether the laundry tub is waiting.

The drainage port of the 1st washing tub is connected with the 2nd washing tub, and the water in the 1st washing tub is discharged to the 2nd washing tub, and can be used repeatedly. A water stop valve is provided at the drain outlet of the first washing tub, and the water in the first washing tub can enter the second washing tub after passing through the water stop valve. A water intake valve is provided in the second washing tub, and external clean water can enter the second washing tub from the water intake valve. The control method is as follows.
1) The first washing tub reaches the drainage program.
2) It is determined whether or not the water in the first washing tub is to be repeatedly used. If the water is repeatedly used, step 3) is executed. If the water is not repeatedly used, step 6) is executed.
3) T _{11 is} the time until the first washing tub executes the next drainage program, and T ₁₂ is the time until the second washing tub executes the water intake program. If T ₁₂ <T ₁₁ , perform step 4), and if T ₁₂ ≧ T ₁₁ , perform step 6).
4) The first washing tub waits for water in the second washing tub to execute step 5).
5) Drain the water in the first washing tub to the second washing tub.
6) The water in the first washing tub is discharged directly.

The control method is that the second washing tub takes water before comparing the time until the first washing tub executes the next drainage program and the time until the second washing tub executes the water intake program. You can also add a process to determine whether or not. The control method is as follows.
1) The first washing tub reaches the drainage program.
2) It is determined whether or not the water in the first washing tub is to be repeatedly used. If the water is to be used repeatedly, step 3) is executed.
3) It is determined whether or not the second washing tub is executing the water intake program at this time. If the water intake program is not executed, step 4) is executed, and if the water intake program is executed, step 6) is executed. Run.
4) T _{11 is} the time until the first washing tub executes the next drainage program, and T ₁₂ is the time until the second washing tub executes the water intake program. If T ₁₂ <T ₁₁ , perform step 5), and if T ₁₂ ≧ T ₁₁ , perform step 7).
5) The first washing tub waits for water in the second washing tub to execute step 6).
6) Drain the water in the first washing tub to the second washing tub.
7) The water in the first washing tub is discharged directly.

The control method may include determining whether the first washing tub has sufficient time to wait for water intake from the second washing tub. The control method is as follows.
1) The first washing tub reaches the drainage program.
2) It is determined whether or not the water in the first washing tub is to be repeatedly used. When the water is repeatedly used, step 3) is executed, and when not repeatedly used, step 8) is executed.
3) It is determined whether or not the second washing tub is executing the water intake program at this time. If the water intake program is not executed, step 4) is executed, and if the water intake program is executed, step 7) is executed. Run.
4) T _{11 is} the time until the first washing tub executes the next drainage program, and T ₁₂ is the time until the second washing tub executes the water intake program. If T ₁₂ <T ₁₁ , perform step 5), and if T ₁₂ ≧ T ₁₁ , perform step 8).
5) Set the allowable waiting time _{T 1,} the case of T 12 _{<T 1,} perform the step _6), the case of _{T 12} ≧ _{T 1,} performing the step 8).
6) The first washing tub waits for water in the second washing tub to execute step 7).
7) Drain the water in the first washing tub to the second washing tub.
8) The water in the first washing tub is discharged directly.

When the water in the first washing tub is dirty, it cannot be used repeatedly. Or even if the 2nd washing tub is the last rinse water intake, it cannot be used repeatedly. The control method is as follows.
1) The first washing tub reaches the drainage program.
2) Measure the turbidity value or foam concentration value of water in the first washing tub, and determine whether the turbidity value or foam concentration value is smaller than the set value.
If so, perform step 3), otherwise perform step 9).
3) Determine whether the second washing tub only leaves the last rinse water intake, if not, perform step 4), otherwise, perform step 9).
4) It is determined whether or not the second washing tub is executing the water intake program at this time. If the water intake program is not executed, step 5) is executed. If the water intake program is executed, step 8) is executed. Run.
5) T _{11 is} the time until the first washing tub executes the next drainage program, and T ₁₂ is the time until the second washing tub executes the water intake program. If T ₁₂ <T ₁₁ , perform step 6), and if T ₁₂ ≧ T ₁₁ , perform step 9).
6) Set the allowable waiting time _{T 1,} the case of T 12 _{<T 1,} and executes the step _7), if the _{T 12} ≧ _{T 1,} performing the step 9).
7) The first washing tub waits for water in the second washing tub to execute step 8).
8) Drain the water in the first washing tub to the second washing tub.
9) The water in the first washing tub is drained directly.

When the water in the first washing tub is discharged into the second washing tub, if the second washing tub is water for washing, it is necessary to wash away the detergent case and to measure the water level. The control method is as follows.
1) The first washing tub reaches the drainage program.
2) Measure the turbidity value or foam concentration value of water in the first washing tub, and determine whether the turbidity value or foam concentration value is smaller than the set value.
If so, perform step 3), otherwise perform step 12).
3) Determine whether the second washing tub only leaves the last rinse water intake, if not, perform step 4), otherwise, perform step 12).
4) It is determined whether or not the second washing tub is executing the water intake program at this time. If the water intake program is not executed, step 5) is executed. If the water intake program is executed, step 10) is executed. Run.
5) T _{11 is} the time until the first washing tub executes the next drainage program, and T ₁₂ is the time until the second washing tub executes the water intake program. If T ₁₂ <T ₁₁ , perform step 6), and if T ₁₂ ≧ T ₁₁ , perform step 12).
6) Set the allowable waiting time _{T 1,} the case of T 12 _{<T 1,} and executes the step _7), if the _{T 12} ≧ _{T 1,} performing the step 12).
7) If the second washing tub determines whether or not to execute the washing water intake program, execute step 8) if executing the laundry water intake program, and execute step 10) if not executing the laundry water intake program To do.
8) The second washing tub first performs water withdrawal to wash away the detergent case, and after the water withdrawal to wash away the detergent case in the second laundry tub is completed, step 9) is executed.
9) The first washing tub waits for water in the second washing tub to execute step 10).
10) Drain the water in the first washing tub to the second washing tub.
11) When the water level in the second washing tub is measured and the water level in the second washing tub reaches the set water level, if there is still water in the first washing tub, the remaining water is directly discharged To do. After all the water in the first washing tub has been discharged into the second washing tub, if the water level in the second washing tub has not yet reached the set water level, water is taken into the second washing tub from the external water intake.
12) The water in the first washing tub is discharged directly.

The 1st washing tub and the 2nd washing tub in a present Example are only the numbers attached for convenience of explanation. It is also possible to repeatedly use the water in the second washing tub without assigning an order relationship. The drain port of the second washing tub is connected to the first washing tub, and the water in the second washing tub can be discharged to the first washing tub and used repeatedly. A water stop valve is provided at the drain outlet of the second washing tub, and the water in the second washing tub can pass through the water stop valve and enter the first washing tub. A water intake valve is provided in the first washing tub, and external clean water can enter the first washing tub from the water intake valve. When one washing tub reaches drainage, and it is judged whether or not the water in the washing tub is discharged to another washing tub and repeatedly used, even if another washing tub reaches drainage, another washing Don't consider repeated use of tank water. Both tanks wait to prevent a closed loop. The control method is as follows.
1) The second washing tub reaches the drainage program.
2) It is determined whether or not the water in the second washing tub is to be repeatedly used. When the water is repeatedly used, Step 3) is executed. When the water is not repeatedly used, Step 6) is executed.
3) T _{11 is} the time until the second washing tub executes the next drainage program, and T ₁₂ is the time until the first washing tub executes the water intake program. If T ₁₂ <T ₁₁ , perform step 4), and if T ₁₂ ≧ T ₁₁ , perform step 6).
4) The second washing tub waits for water in the first washing tub to execute step 5).
5) Drain the water in the second washing tub to the first washing tub.
6) The water in the second washing tub is drained directly.

The control method is that the first washing tub takes water before comparing the time until the second washing tub executes the next drainage program and the time until the first washing tub executes the water intake program. You can also add a process to determine whether or not. The control method is as follows.
1) The second washing tub reaches the drainage program.
2) It is determined whether or not the water in the second washing tub is to be repeatedly used. When the water is repeatedly used, step 3) is executed. When the water is not repeatedly used, step 7) is executed.
3) It is determined whether or not the first washing tub is currently executing the water intake program. If the water intake program is not executed, step 4) is executed, and if the water intake program is executed, step 6) is executed. Run.
4) T _{11 is} the time until the second washing tub executes the next drainage program, and T ₁₂ is the time until the first washing tub executes the water intake program. If T ₁₂ <T ₁₁ , perform step 5), and if T ₁₂ ≧ T ₁₁ , perform step 7).
5) The second washing tub waits for water in the first washing tub to execute step 6).
6) Drain the water in the second washing tub into the first washing tub.
7) The water in the second washing tub is discharged directly.

The control method may include determining whether the second washing tub has sufficient time to wait for water intake from the first washing tub. The control method is as follows.
1) The second washing tub reaches the drainage program.
2) It is determined whether or not the water in the second washing tub is to be repeatedly used. When the water is repeatedly used, Step 3) is executed. When the water is not repeatedly used, Step 8) is executed.
3) It is determined whether or not the first washing tub is currently executing the water intake program. If the water intake program is not executed, step 4) is executed, and if the water intake program is executed, step 7) is executed. Run.
4) T _{11 is} the time until the second washing tub executes the next drainage program, and T ₁₂ is the time until the first washing tub executes the water intake program. If T ₁₂ <T ₁₁ , perform step 5), and if T ₁₂ ≧ T ₁₁ , perform step 8).
5) Set the allowable waiting time _{T 1,} the case of T 12 _{<T 1,} perform the step _6), the case of _{T 12} ≧ _{T 1,} performing the step 8).
6) The second washing tub waits for water in the first washing tub and executes step 7).
7) Drain the water in the second washing tub to the first washing tub.
8) The water in the second washing tub is discharged directly.

If the water in the second washing tub is dirty, it cannot be used repeatedly. Or even if the 1st washing tub is the last rinse water intake, it cannot be used repeatedly. The control method is as follows.
1) The second washing tub reaches the drainage program.
2) The turbidity value or foam concentration value of the water in the second washing tub is measured to determine whether the turbidity value or foam concentration value is smaller than the set value.
If so, perform step 3), otherwise perform step 9).
3) Determine whether the first washing tub only leaves the last rinse water intake, if not, perform step 4), otherwise, perform step 9).
4) It is determined whether or not the first washing tub is executing the water intake program at this time. If the water intake program is not executed, step 5) is executed, and if the water intake program is executed, step 8) is executed. Run.
5) T _{11 is} the time until the second washing tub executes the next drainage program, and T ₁₂ is the time until the first washing tub executes the water intake program. If T ₁₂ <T ₁₁ , perform step 6), and if T ₁₂ ≧ T ₁₁ , perform step 9).
6) Set the allowable waiting time _{T 1,} the case of T 12 _{<T 1,} and executes the step _7), if the _{T 12} ≧ _{T 1,} performing the step 9).
7) The second washing tub waits for water in the first washing tub to execute step 8).
8) Drain the water in the second washing tub to the first washing tub.
9) The water in the second washing tub is discharged directly.

When the water in the second washing tub is discharged to the first washing tub, if the first washing tub is water for washing, it is necessary to wash away the detergent case and to measure the water level. The control method is as follows.
1) The second washing tub reaches the drainage program.
2) The turbidity value or foam concentration value of the water in the second washing tub is measured to determine whether the turbidity value or foam concentration value is smaller than the set value.
If so, perform step 3), otherwise perform step 12).
3) Determine if the first washing tub only leaves the last rinse water intake, if not, perform step 4), otherwise, perform step 12).
4) It is determined whether the first washing tub is executing the water intake program at this time. If the water intake program is not executed, step 5) is executed, and if the water intake program is executed, step 10) is executed. Run.
5) T _{11 is} the time until the second washing tub executes the next drainage program, and T ₁₂ is the time until the first washing tub executes the water intake program. If T ₁₂ <T ₁₁ , perform step 6), and if T ₁₂ ≧ T ₁₁ , perform step 12).
6) Set the allowable waiting time _{T 1,} the case of T 12 _{<T 1,} and executes the step _7), if the _{T 12} ≧ _{T 1,} performing the step 12).
7) If the first washing tub determines whether or not to execute the washing water intake program, execute step 8) if executing the laundry water intake program, and execute step 10) if not executing the laundry water intake program To do.
8) The first washing tub first performs water withdrawal to wash away the detergent case, and after the water withdrawal to wash away the detergent case in the first laundry tub is completed, step 9) is executed.
9) The second washing tub waits for water in the first washing tub and executes step 10).
10) Drain the water in the second washing tub into the first washing tub.
11) When the water level in the first washing tub is measured and the water level in the first washing tub reaches the set water level, if there is still water in the second washing tub, the remaining water is directly discharged To do. After all the water in the second washing tub has been discharged into the first washing tub, if the water level in the first washing tub has not yet reached the set water level, water is taken into the first washing tub from the external water intake.
12) The water in the second washing tub is discharged directly.

Example 4
As shown in FIG. 4, the present embodiment employs a water intake waiting time as a determination criterion, and determines whether to use water repeatedly. Based on the water intake waiting time, when the water intake program is reached, it waits for the drainage of another tank and determines whether to use it repeatedly. It has simple judgment and control logic, and in the actual washing program, the control stability is relatively high. Furthermore, it is possible to sufficiently use water repeatedly, has high practical value, and can be applied more effectively and widely.

A control method for repeatedly using water when the first washing tub and the second washing tub are simultaneously in operation is as follows.
In the control method of repeatedly using water from a plurality of tank washing machines, the plurality of tank washing machines include at least a first washing tank and a second washing tank. When the first washing tub and the second washing tub are simultaneously in operation, a control method for repeatedly using water is as follows. When the first washing tub reaches a water intake program, the second washing tub and the time T ₂₂ to reach the drainage program, first washing tub compares the time T ₂₁ to reach the next intake program. When T ₂₂ ≧ T ₂₁ , the first washing tub directly takes clean water, and when T ₂₂ <T ₂₁ , the first washing tub waits for drainage of the second washing tub.

A second washing tub time T ₂₂ to reach the drainage program, whether the first washing tub before comparing the time T ₂₁ to reach the next intake programs can repeatedly use the water in the second washing tub Judging. If it cannot be used repeatedly, the first washing tub directly takes clean water, and if it can be used repeatedly, the time T ₂₂ when the second washing tub reaches the drainage program and the first washing tub takes the next water intake. Compare the time T ₂₁ to reach the program. Or when the 1st washing tub waits for the drainage of the 2nd washing tub, it is judged whether the water of the 2nd washing tub can be used repeatedly. When it cannot be used repeatedly, the first washing tub directly takes clean water, and when it can be used repeatedly, the water in the second washing tub is discharged to the first washing tub and used repeatedly.

Specifically, Step 1: The first washing tub reaches the water intake program, a time T ₂₂ the second washing tub reaches a drainage program, first washing tub compares the time T ₂₁ to reach the next intake program . When T ₂₂ ≧ T ₂₁ , the first washing tub directly takes clean water, and when T ₂₂ <T ₂₁ , the first washing tub waits for drainage of the second washing tub and executes step 2.
Step 2: Determine whether the water in the second washing tub can be used repeatedly. When the water can be used repeatedly, the water in the second washing tub is discharged to the first washing tub and repeatedly used. When the water cannot be used repeatedly, the first washing tub directly takes clean water. A process for determining whether to wait is added, the probability of repeatedly using the water in the second washing tub is greatly increased, and more water can be used repeatedly.

In Step 1, when the first washing tub reaches a water intake program, if the second washing tub is drained, it reaches time T ₂₂ to the second washing tub drainage program 0, no need to wait, directly Step 2 is performed. A second washing tub time T ₂₂ to reach the drainage program, before the first washing tub to compare the time T ₂₁ to reach the next intake program, second washing tank earlier running drainage program this time It can also be determined whether or not. If the second washing tub does not run drainage program, the second washing tub and the time T ₂₂ to reach the drainage program, first washing tub compares the time T ₂₁ to reach the next intake program.

In step 1, an allowable waiting time T ₂ (T ₂ <T ₂₁ ) is set, and when T ₂₂ <T ₂ , the first washing tub waits for drainage of the second washing tub and executes step 2. When T ₂₂ ≧ T ₂ , the first washing tub directly takes clean water. By this step, the first washing tub can be prevented from waiting for a long time, and the repeated use of water is rationally adjusted on the assumption that the washing time of the first washing tub is guaranteed. Since only the repeated use of water is taken into account, much time in the first washing tub is not wasted. When the washing machine determines that the waiting time is long and exceeds the set allowable waiting time, the first washing tub does not repeatedly use the water in the second washing tub. This judgment made the repeated use of water more rational, and adjusted the relationship between the waiting time and the repeated use of water to the maximum.

  In step 2, the turbidity value or foam concentration value of water in the second washing tub is measured. If the turbidity value or foam concentration value is smaller than the set value, the water in the second washing tub can be used repeatedly, otherwise the water in the second washing tub cannot be used repeatedly. Water can be used repeatedly only when the turbidity value or foam concentration value of the water is within the set range.

In step 1, when the first washing tub reaches the water intake program, it is determined whether the water intake program to be started is the last rinse water intake. If so, the first washing tank and intake clean water directly, otherwise, a time T ₂₂ the second washing tub reaches a drainage program, a time T ₂₁ the first washing tub reaches the next intake program Continue to compare. The final rinse water intake ensures clean water intake and the effect after the clothes are washed.

  In step 2, when the water in the second washing tub is discharged to the first washing tub, it is determined whether the first washing tub executes a washing water intake program. When the washing water intake program is executed, the first washing tub first performs the water removal to wash away the detergent case, and after the water intake to wash away the detergent case in the first washing tub is completed, the water in the second washing tub is discharged to the first washing tub. To discharge. When the washing water intake program is not executed, the water in the second washing tub is directly discharged to the first washing tub.

  In step 2, when the water in the second washing tub is discharged to the first washing tub, the height of the water level in the first washing tub is measured. When the water level in the first washing tub reaches the set water level value, if there is still water in the second washing tub, the remaining water in the second washing tub is directly discharged. After all the water in the second washing tub is discharged into the first washing tub, if the water level in the first washing tub has not yet reached the set water level, the first washing tub takes in clean water.

When the water in the second washing tub is directly discharged, it is determined whether or not the first washing tub is currently executing the dehydration program. When the dehydration program is executed, the second washing tub drains after completing the dehydration of the first washing tub. When the dehydration program is not executed, the time until dehydration of the first washing tub is T ₄₁ , the time required for dehydration of the first washing tub is T ₄₄ , and an allowable waiting time T ₄ is set. In the case of T ₄₁ + T ₄₄ <T ₄ , the second washing tub is drained after completion of dehydration of the first washing tub, otherwise the water in the second washing tub is directly discharged.

  By determining the washing state and the number of times of washing, it can also be determined that the water in the first washing tub can be used repeatedly. In step 2, when the second washing tub is drained, it is in a washing state, when the first washing tub is withdrawn, in a rinse state, or when the second washing tub is drained and when the first washing tub is withdrawn In the washing state, the number of washings in the second washing tub is less than the number of washings in the first washing tub, or when the second washing tub is drained and when the first washing tub is watered, both are in the rinse state. When the number of times of rinsing of the washing tub is less than the number of times of rinsing of the first washing tub, the water in the first washing tub cannot be repeatedly used.

  When the second washing tub reaches the water intake program, the time for the first washing tub to reach the drainage program is compared with the time for the second washing tub to reach the next water intake program. Determine whether to wait for drainage.

The drain port of the second washing tub is connected to the first washing tub, and the water in the second washing tub can be discharged to the first washing tub and used repeatedly. A water stop valve is provided at the drain outlet of the second washing tub, and the water in the second washing tub can pass through the water stop valve and enter the first washing tub. A water intake valve is provided in the first washing tub, and external clean water can enter the first washing tub from the water intake valve. The control method is as follows.
1) The first washing tub reaches the water intake program.
2) It is determined whether or not the water in the second washing tub is to be repeatedly used. When the water is repeatedly used, Step 3) is executed. When the water is not repeatedly used, Step 6) is executed.
3) first washing tub time until the next water intake program T _21, the second washing tub and T ₂₂ the time to perform the drainage program. If T ₂₂ <T ₂₁ , perform step 4), and if T ₂₂ ≧ T ₂₁ , perform step 6).
4) The first washing tub waits for the second washing tub to drain and executes step 5).
5) Drain the water in the second washing tub to the first washing tub.
6) The first washing tub directly takes clean water, and the second washing tub drains directly.

The control method includes a second washing tub time T ₂₂ to reach the drainage program, before the first washing tub to compare the time T ₂₁ to reach the next intake programs, whether the second washing tub is drained It is also possible to add a process of judging The control method is as follows.
1) The first washing tub reaches the water intake program.
2) It is determined whether or not the water in the second washing tub is to be repeatedly used. When the water is repeatedly used, step 3) is executed.
3) It is determined whether or not the second washing tub is executing the drainage program at this time. If the drainage program is not executed, step 4) is executed, and if the drainage program is executed, step 6) is executed. Run.
4) T _{21 is} the time until the first washing tub executes the next water intake program, and T ₂₂ is the time until the second washing tub executes the drainage program. If T ₂₂ <T ₂₁ , perform step 5), and if T ₂₂ ≧ T ₂₁ , perform step 7).
5) The first washing tub waits for the drainage of the second washing tub and executes step 6).
6) Drain the water in the second washing tub into the first washing tub.
7) The first washing tub directly takes clean water, and the second washing tub drains directly.

The control method may include determining whether the first washing tub has sufficient time to wait for the second washing tub to drain. The control method is as follows.
1) The first washing tub reaches the water intake program.
2) It is determined whether or not the water in the second washing tub is to be repeatedly used. When the water is repeatedly used, Step 3) is executed. When the water is not repeatedly used, Step 8) is executed.
3) It is determined whether or not the second washing tub is executing the drainage program at this time. If the drainage program is not executed, the process 4) is executed, and if the drainage program is executed, the process 7) is executed. Run.
4) T _{21 is} the time until the first washing tub executes the next water intake program, and T ₂₂ is the time until the second washing tub executes the drainage program. If T ₂₂ <T ₂₁ , perform step 5), and if T ₂₂ ≧ T ₂₁ , perform step 8).
5) Set the allowable waiting time _{T 2,} when the T 22 _{<T 2,} and executes the step _6), the case of _{T 22} ≧ _{T 2,} performing the step 8).
6) The first washing tub waits for the drainage of the second washing tub and executes step 7).
7) Drain the water in the second washing tub to the first washing tub.
8) The first washing tub directly takes clean water, and the second washing tub drains directly.

If the water in the second washing tub is dirty, it cannot be used repeatedly. Or even if the 1st washing tub is the last rinse water intake, it cannot be used repeatedly. The control method is as follows.
1) The first washing tub reaches the water intake program.
2) Determine whether the first washing tub will only leave the last rinse water intake, if not, perform step 3), otherwise, perform step 9).
3) It is determined whether or not the second washing tub is executing the drainage program at this time. If the drainage program is not executed, the process 4) is executed, and if the drainage program is executed, the process 7) is executed. Run.
4) T _{21 is} the time until the first washing tub executes the next water intake program, and T ₂₂ is the time until the second washing tub executes the drainage program. If T ₂₂ <T ₂₁ , perform step 5), and if T ₂₂ ≧ T ₂₁ , perform step 9).
5) Set the allowable waiting time _{T 2,} when the T 22 _{<T 2,} and executes the step _6), the case of _{T 22} ≧ _{T 2,} performing the step 9).
6) The first washing tub waits for the drainage of the second washing tub and executes step 7).
7) Measure the turbidity value or foam concentration value of water in the second washing tub, and determine whether the turbidity value or foam concentration value is smaller than the set value.
If so, perform step 8), otherwise perform step 9).
8) Drain the water in the second washing tub to the first washing tub.
9) The first washing tub directly takes clean water, and the second washing tub drains directly.

When the water in the second washing tub is discharged to the first washing tub, if the first washing tub is water for washing, it is necessary to wash away the detergent case and to measure the water level. The control method is as follows.
1) The first washing tub reaches the water intake program.
2) Determine whether the first washing tub only leaves the last rinse water intake, if not, perform step 3), otherwise, perform step 12).
3) It is determined whether or not the second washing tub is executing the drainage program at this time. If the drainage program is not executed, the process 4) is executed, and if the drainage program is executed, the process 7) is executed. Run.
4) T _{21 is} the time until the first washing tub executes the next water intake program, and T ₂₂ is the time until the second washing tub executes the drainage program. If T ₂₂ <T ₂₁ , perform step 5), and if T ₂₂ ≧ T ₂₁ , perform step 12).
5) Set the allowable waiting time _{T 2,} when the T 22 _{<T 2,} and executes the step _6), the case of _{T 22} ≧ _{T 2,} performing the step 12).
6) The first washing tub waits for the drainage of the second washing tub and executes step 7).
7) Measure the turbidity value or foam concentration value of water in the second washing tub, and determine whether the turbidity value or foam concentration value is smaller than the set value.
If so, perform step 8), otherwise perform step 12).
8) It is determined whether or not the first washing tub executes a washing water intake program. If the washing water intake program is executed, step 9) is executed. If the laundry water intake program is not executed, step 10) is executed. To do.
9) The first washing tub first performs water removal to wash away the detergent case, and after the water intake to wash away the detergent case in the first laundry tub is completed, step 10) is executed.
10) Drain the water in the second washing tub into the first washing tub.
11) When the water level in the first washing tub is measured and the water level in the first washing tub reaches the set water level, if there is still water in the second washing tub, the remaining water is directly discharged To do. After all the water in the second washing tub has been discharged into the first washing tub, when the water level in the first washing tub has not reached the set water level, water is taken into the first washing tub from the external water intake.
12) The first washing tub directly takes clean water, and the second washing tub drains directly.

  The 1st washing tub and the 2nd washing tub in a present Example are only the numbers attached for convenience of explanation. The water in the first washing tub can be reused without assigning an order relationship. The water intake of the second washing tub is connected to the drain of the first washing tub, and the water in the first washing tub can be discharged to the second washing tub and used repeatedly. A water stop valve is provided at the drain outlet of the first washing tub, and the water in the first washing tub can enter the second washing tub after passing through the water stop valve. A water intake valve is provided in the second washing tub, and external clean water can enter the second washing tub from the water intake valve. When one of the washing tubs reaches the water intake and it is determined whether or not the water of the other washing tub is discharged into the washing tub and repeatedly used, even if the other washing tub reaches the water intake, Do not consider reusing water repeatedly. Both tanks wait to prevent a closed loop.

The control method is as follows.
1) The second washing tub reaches the water intake program.
2) It is determined whether or not the water in the first washing tub is to be repeatedly used. If the water is repeatedly used, step 3) is executed. If the water is not repeatedly used, step 6) is executed.
3) The second washing tub time until the next water intake program T _21, the first washing tank and T ₂₂ the time to perform the drainage program. If T ₂₂ <T ₂₁ , perform step 4), and if T ₂₂ ≧ T ₂₁ , perform step 6).
4) The second washing tub waits for the first washing tub to drain and performs step 5).
5) Drain the water in the first washing tub to the second washing tub.
6) The second washing tub takes clean water directly, and the first washing tub drains directly.

The control method includes a first washing tub drainage program reaches time T _22, before the second washing tub to compare the time T ₂₁ to reach the next intake program, whether the first washing tub is drained It is also possible to add a process of judging. The control method is as follows.
1) The second washing tub reaches the water intake program.
2) It is determined whether or not the water in the first washing tub is to be repeatedly used. If the water is repeatedly used, step 3) is executed. If the water is not repeatedly used, step 7) is executed.
3) It is determined whether or not the first washing tub is executing the drainage program at this time, and if the drainage program is not executed, step 4) is executed, and if the drainage program is executed, step 6) is executed. Run.
4) Let T _{21 be} the time until the second washing tub executes the next water intake program, and T ₂₂ the time until the first washing tub executes the drainage program. If T ₂₂ <T ₂₁ , perform step 5), and if T ₂₂ ≧ T ₂₁ , perform step 7).
5) The second washing tub waits for the first washing tub to drain and performs step 6).
6) Drain the water in the first washing tub to the second washing tub.
7) The second washing tub directly takes clean water, and the first washing tub drains directly.

The control method may include determining whether the second washing tub has sufficient time to wait for the first washing tub to drain. The control method is as follows.
1) The second washing tub reaches the water intake program.
2) It is determined whether or not the water in the first washing tub is to be repeatedly used. When the water is repeatedly used, step 3) is executed. When the water is not repeatedly used, step 8) is executed.
3) It is determined whether or not the first washing tub is executing the drainage program at this time. If the drainage program is not executed, step 4) is executed, and if the drainage program is executed, step 7) is executed. Run.
4) Let T _{21 be} the time until the second washing tub executes the next water intake program, and T ₂₂ the time until the first washing tub executes the drainage program. If T ₂₂ <T ₂₁ , perform step 5), and if T ₂₂ ≧ T ₂₁ , perform step 8).
5) Set the allowable waiting time _{T 2,} when the T 22 _{<T 2,} and executes the step _6), the case of _{T 22} ≧ _{T 2,} performing the step 8).
6) The second washing tub waits for the first washing tub to drain and performs step 7).
7) Drain the water in the first washing tub to the second washing tub.
8) The second washing tub directly takes clean water, and the first washing tub drains directly.

When the water in the first washing tub is dirty, it cannot be used repeatedly. Or even if the 2nd washing tub is the last rinse water intake, it cannot be used repeatedly. The control method is as follows.
1) The second washing tub reaches the water intake program.
2) Determine whether the second washing tub will only leave the last rinse water intake, if not, perform step 3), otherwise, perform step 9).
3) It is determined whether or not the first washing tub is executing the drainage program at this time. If the drainage program is not executed, step 4) is executed, and if the drainage program is executed, step 7) is executed. Run.
4) Let T _{21 be} the time until the second washing tub executes the next water intake program, and T ₂₂ the time until the first washing tub executes the drainage program. If T ₂₂ <T ₂₁ , perform step 5), and if T ₂₂ ≧ T ₂₁ , perform step 9).
5) Set the allowable waiting time _{T 2,} when the T 22 _{<T 2,} and executes the step _6), the case of _{T 22} ≧ _{T 2,} performing the step 9).
6) The second washing tub waits for the first washing tub to drain and performs step 7).
7) Measure the turbidity value or foam concentration value of the water in the first washing tub, and determine whether the turbidity value or foam concentration value is smaller than the set value.
If so, perform step 8), otherwise perform step 9).
8) Drain the water in the first washing tub to the second washing tub.
9) The second washing tub directly takes clean water, and the first washing tub drains directly.

When the water in the first washing tub is discharged into the second washing tub, if the second washing tub is water for washing, it is necessary to wash away the detergent case and to measure the water level. The control method is as follows.
1) The second washing tub reaches the water intake program.
2) Determine whether the second washing tub only leaves the last rinse water intake, if not, perform step 3), otherwise, perform step 12).
3) It is determined whether or not the first washing tub is executing the drainage program at this time. If the drainage program is not executed, step 4) is executed, and if the drainage program is executed, step 7) is executed. Run.
4) Let T _{21 be} the time until the second washing tub executes the next water intake program, and T ₂₂ the time until the first washing tub executes the drainage program. If T ₂₂ <T ₂₁ , perform step 5), and if T ₂₂ ≧ T ₂₁ , perform step 12).
5) Set the allowable waiting time _{T 2,} when the T 22 _{<T 2,} and executes the step _6), the case of _{T 22} ≧ _{T 2,} performing the step 12).
6) The second washing tub waits for the first washing tub to drain and performs step 7).
7) Measure the turbidity value or foam concentration value of the water in the first washing tub, and determine whether the turbidity value or foam concentration value is smaller than the set value.
If so, perform step 8), otherwise perform step 12).
8) It is determined whether the second washing tub executes a washing water intake program. If the washing water intake program is executed, step 9) is executed. If the laundry water intake program is not executed, step 10) is executed. To do.
9) The second washing tub first performs the water intake to wash away the detergent case, and after the water intake to wash away the detergent case in the second laundry tub is completed, step 10) is executed.
10) Drain the water in the first washing tub to the second washing tub.
11) When the water level in the second washing tub is measured and the water level in the second washing tub reaches the set water level, if there is still water in the first washing tub, the remaining water is directly discharged To do. After all the water in the first washing tub has been discharged into the second washing tub, if the water level in the second washing tub has not yet reached the set water level, water is taken into the second washing tub from the external water intake.
12) The second washing tub directly takes clean water, and the first washing tub drains directly.

  The above description is only a preferred implementation mode of the present invention. It should be pointed out that a person skilled in the art can make several changes and modifications without departing from the principle of the present invention, which should also be regarded as the protection scope of the present invention.

1 1st washing tub 2 2nd washing tub

Claims (20)

A drainage control method for a multiple tub washing machine, including at least a first washing tub and a second washing tub,
When the first washing tub reaches the drainage program, it is determined whether the second washing tub is dewatered at this time, and if dehydrated, the first washing tub waits for the completion of dehydration of the second washing tub, Start draining;
If the second washing tub is not dewatered at this time, the first washing tub waits for the completion of dehydration of the second washing tub and determines whether to start draining. The process in which the first washing tub waits for the completion of the dehydration of the second washing tub and determines whether or not to drain is determined by T ₃₂ as the time until dehydration of the second washing tub, and T and _33, to set the allowable waiting time _{T 3,} the case of _{T 32 + T 33 <T 3} , the first washing tank and drained after completion of the dehydration of the second washing tub, the first washing tank otherwise The drainage control method for a multi-tub washing machine according to claim 1, wherein the water includes direct discharge.   When the first washing tub reaches the drainage program, it is determined whether the second washing tub is draining at this time. If the second washing tub is draining at this time, the first washing tub is The drainage control method for a multi-basin washing machine according to claim 1 or 2, wherein drainage is performed after completion of drainage, and otherwise, water in the first washing tub is directly discharged. When the first washing tub reaches a drainage program, the second washing tub to the time T ₁₂ to reach the water intake program, first washing tub compares the time T ₁₁ to reach the next drainage programs, T _{12 <T 11} In this case, the first washing tub waits for water to be taken from the second washing tub, and when T ₁₂ ≧ T ₁₁ , the water in the first washing tub is directly discharged. The drainage control method of the multi-tub washing machine as described in 2. A time T ₁₂ the second washing tub reaches a water intake program, whether the first washing tub before comparing the time T ₁₁ to reach the next drainage programs can repeatedly use the water in the first washing tub If the water cannot be repeatedly used, the water in the first washing tub is directly drained, and if it can be used repeatedly, the time T ₁₂ when the second washing tub reaches the water intake program, comparing the time T ₁₁ to reach the next drainage programs;
Or when the 1st washing tub waits for water intake of the 2nd washing tub, it judges whether the water of the 1st washing tub can be used repeatedly, and when it cannot use repeatedly, the water of the 1st washing tub is The drain of the multi-tub washing machine according to claim 4, wherein when the water can be directly discharged and repeatedly used, the water in the first washing tub is discharged into the second washing tub and the water is repeatedly used. Control method. When the first washing tub reaches a drainage program, if the second washing tub is intake, reaching time T ₁₂ in the second washing tub intake program 0, characterized in that no need to wait, The drainage control method for a multi-tub washing machine according to claim 4 or 5. The allowable waiting time T ₁ (T ₁ <T ₁₁ ) is set, the time T ₁₂ when the second washing tub reaches the water intake program is compared with the set allowable waiting time T _1, and when T ₁₂ <T ₁ , The first washing tub waits for water to be taken from the second washing tub, and when T ₁₂ ≧ T ₁ , the water in the first washing tub is directly discharged. Drainage control method for multiple tub washing machines.   When the first wash tub reaches the drainage program, it is determined whether the second wash tub is performing or is about to be the last rinse water intake, and if so, the first wash 8. The tank according to any one of claims 4 to 7, characterized in that the water in the tank is drained directly, otherwise it is determined whether the water in the first washing tank can be used repeatedly. Drainage control method for multiple tub washing machines.   When the second washing tub reaches the drainage program, it is determined whether the first washing tub is dehydrated at this time, and if so, the second washing tub waits for the completion of the dehydration of the first washing tub and drains. The method according to claim 1, wherein if the first washing tub is not dewatered at this time, it is determined whether or not to drain after waiting for the dehydration of the first washing tub to be completed. The drainage control method of the multiple tank washing machine of description.   When the first washing tub reaches the drainage program, it is determined whether the second washing tub is operating at this time, and if so, the second washing tub is running or willing to run the dehydration program The drainage control method for a multi-basin washing machine according to any one of claims 1 to 9, wherein the first washing tub directly executes a drainage program when it is determined whether or not it is operating. A drainage control method for a multiple tub washing machine, including at least a first washing tub and a second washing tub,
When the first washing tub reaches the drainage program, it is determined whether the second washing tub is draining or dewatering at this time, and if it is draining or dehydrating, the first washing tub is dewatering of the second washing tub. Wait for completion and start draining;
If the second washing tub is not draining or dewatering at this time, the first washing tub waits for the completion of dehydration of the second washing tub and determines whether it is necessary to start draining. When the first washing tub waits for the completion of the dehydration of the second washing tub and determines whether or not it is necessary to start drainage, the time until drainage of the second washing tub is T ₃₁ , The required time is T ₃₄ , the required time for dehydration of the second washing tub is T ₃₃ , the time until the next drainage of the first washing tub is T ₅ , and if T ₅ <T ₃₁ + T ₃₄ , 12. The water according to claim 11, characterized in that the water is drained directly, otherwise the first washing tub waits for the completion of the dehydration of the second washing tub and then it is necessary to start draining. Drainage control method for multiple tub washing machines. When the first washing tub waits for the completion of the dehydration of the second washing tub and determines whether or not it is necessary to start drainage, the time until drainage of the second washing tub is T ₃₁ , The required time is T ₃₄ , the required time for dehydration of the second washing tub is T ₃₃ , an allowable waiting time T ₃ is set, and when T ₃₁ + T ₃₄ + T ₃₃ <T ₃ , the first washing tub is the second washing tub 13. The drainage control method for a multi-basin washing machine according to claim 11 or 12, wherein the drainage is performed after completion of the dehydration, and otherwise the water in the first washing tub is directly discharged.   When the first washing tub reaches the drainage program, it is first determined whether the second washing tub is operating at this time, and if not, the first washing tub directly executes the drainage program and operates. 14. The drainage control method for a multi-tub washing machine according to any one of claims 11 to 13, wherein it is determined whether the second washing tub is drained or dewatered at this time.   If it is determined that the first washing tub waits for the dehydration of the second washing tub to be completed, it is determined whether the second washing tub has completed the dehydration and whether water needs to be taken. When it is necessary to drain water from one washing tub directly and take water, it is judged whether or not the water from the first washing tub can be used repeatedly. The drainage control method for a multi-basin washing machine according to any one of claims 11 to 14, wherein the waste water is discharged into the second washing tub.   When the first washing tub reaches the drainage program, if the second washing tub is taking water, it is determined whether the water in the first washing tub can be used repeatedly, and if it can be used repeatedly, The drainage control method for a multi-tub washing machine according to any one of claims 11 to 15, wherein the water in the first washing tub is discharged to the second washing tub.   17. The water of the first washing tub cannot be reused when the second washing tub is running or it is the last rinsing water withdrawal that is performed. The drainage control method of the multi-tub washing machine as described in 2.   The drainage control method for a multi-tub washing machine according to claim 15 or 16, wherein when the first washing tub is the last rinse drainage, the water in the first washing tub cannot be repeatedly used.   When the first washing tub is drained, it is in the washing state, when the second washing tub is withdrawn, in the rinse state, or when the first washing tub is drained and when the second washing tub is withdrawn, both are in the washing state The number of washings in the first washing tub is less than the number of washings in the second washing tub, or the first washing tub is in a rinse state when draining the first washing tub and when the second washing tub is taking water. If the number of times of rinsing is less than the number of times of rinsing of the second washing tub or the turbidity of the water in the first tub exceeds a set value, the water in the first tub cannot be repeatedly used. Item 15. The drainage control method for a multi-tub washing machine according to Item 15 or 16.   When the second washing tub reaches the drainage program, it is determined whether the first washing tub is draining or dewatering at this time, and if it is draining or dehydrating, the second washing tub is dewatering of the first washing tub. Wait for completion and start draining; if the first washing tub is not draining or dewatering at this time, the second washing tub will wait for completion of dehydration of the first washing tub and whether draining should be started The drainage control method for a multi-tub washing machine according to any one of claims 11 to 19, characterized by determining.