CN106319843B

CN106319843B - Drainage control method of multi-drum washing machine

Info

Publication number: CN106319843B
Application number: CN201510401932.1A
Authority: CN
Inventors: 李文伟; 常园园; 吴军; 王光锋; 王金凯
Original assignee: Qingdao Haier Drum Washing Machine Co Ltd
Current assignee: Qingdao Haier Drum Washing Machine Co Ltd; Haier Smart Home Co Ltd
Priority date: 2015-07-09
Filing date: 2015-07-09
Publication date: 2020-04-28
Anticipated expiration: 2035-07-09
Also published as: CN106319843A

Abstract

The invention relates to a drainage control method of a multi-drum washing machine, wherein the multi-drum washing machine at least comprises a first washing drum and a second washing drum, when the first washing drum reaches a drainage program, whether the second washing drum is draining or dehydrating at the moment is judged, and if the second washing drum is draining or dehydrating, the first washing drum waits until the second washing drum finishes dehydrating and then begins to drain water; if the second washing drum does not drain or dehydrate at the moment, judging whether the first washing drum needs to wait until the second washing drum dehydrates and then starts draining.

Description

Drainage control method of multi-drum washing machine

Technical Field

The invention relates to the field of washing, in particular to a drainage control method of a multi-drum washing machine.

Background

At present, most of the drum washing machines on the market only have one washing drum. As the health consciousness of people is strengthened, more and more users need to wash different types of laundry separately or wash a small amount of laundry in time.

Along with the improvement of the quality of life of people, the hygiene consciousness is gradually improved, and particularly in the aspect of household clothes washing, more and more people wash clothes separately. If the existing washing machine adopts a mode of washing clothes for many times, the requirement is difficult to meet in the aspect of washing time; if two or more washing machines are purchased to separately and simultaneously wash, not only can great waste of energy and water resources be brought, but also the occupied space is large, and the washing machine is not suitable for household use. Therefore, the above needs can be satisfied by a multi-drum washing machine, solving the problem of waste of energy, water and space.

Patent 201010117002.0 discloses a control method of a washing machine comprising a first washing tub and a second washing tub, the method comprising the steps of: receiving a first operation instruction requiring a water supply procedure or a water discharge procedure to be performed in the first washing tub; determining whether the same operation instruction is being performed in the second washing tub; determining that the first operation instruction cannot be executed while the same operation instruction is being executed in the second washing tub; determining which one of the first and second washing tubs has a shorter remaining washing time when the same operation command requiring the water supply procedure or the water discharge procedure is simultaneously input into the first and second washing tubs; and preferentially performing the water supply process or the water discharge process in the washing tub having a shorter remaining washing time.

The double-drum washing machine has a high gravity center and is unstable, so the requirement on vibration is high, the vibration is smaller when the whole mass of the washing machine is larger, the vibration is certainly caused when the drum runs at high speed when a dehydration process is executed, and the drum with the high gravity center generates larger vibration and noise, so that unnecessary trouble is brought to daily life. Sometimes, when one washing drum drains water, the other washing drum is dewatering, if the water is drained away, the vibration is only increased, and if the water is not drained firstly, the part of water can play a role of a counter weight. However, when one drum is not discharging water, the other drum is dewatering, so that it is necessary to judge whether to wait for the other drum to discharge water.

The invention is therefore set forth in this light.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a drainage control method of a multi-drum washing machine, which reduces the vibration during dehydration.

In order to realize the purpose, the invention adopts the following technical scheme: a drainage control method of a multi-drum washing machine at least comprises a first washing drum and a second washing drum, wherein when the first washing drum reaches a drainage program, whether the second washing drum is draining or dehydrating at the moment is judged, and if the second washing drum is draining or dehydrating, the first washing drum starts to drain after the second washing drum finishes dehydrating; if the second washing drum does not drain or dehydrate at the moment, judging whether the first washing drum needs to wait until the second washing drum dehydrates and then starts draining.

And if T5 is less than T31+ T32, the water in the first washing drum is directly drained, otherwise, whether the first washing drum needs to wait until the second washing drum finishes the dewatering and then begins to drain is continuously judged.

And determining the time T31 from the second washing drum to the water drainage, the time T32 from the water drainage of the second washing drum to the water drainage and the time T33 from the water drainage of the second washing drum when judging whether the first washing drum needs to wait until the second washing drum starts to drain water after the second washing drum finishes the water drainage, and setting an allowable waiting time T3, wherein if T31+ T32+ T33 is less than T3, the first washing drum waits for the second washing drum to drain water after the second washing drum finishes the water drainage, otherwise, the water in the first washing drum is directly drained.

When the first washing drum reaches the drainage program, whether the second washing drum is running at the moment is judged firstly, if not, the first washing drum directly executes the drainage program, and if so, whether the second washing drum is draining or dehydrating at the moment is continuously judged.

If the first washing drum waits until the second washing drum finishes dewatering, whether water needs to be fed or not is judged, if the water does not need to be fed, the water in the first washing drum is directly drained away, if the water needs to be fed, whether the water in the first washing drum can be recycled or not is judged, and if the water can be recycled, the water in the first washing drum is drained into the second washing drum.

When the first washing drum reaches the drainage program, if the second washing drum is feeding water, judging whether the water in the first washing drum can be reused, if so, draining the water in the first washing drum into the second washing drum.

If the second wash drum is running or is about to run for the last rinse intake, the water from the first wash drum may not be reused.

If the first wash drum is drained for the last rinse, the water of the first wash drum may not be reused.

If the first washing drum is in a washing state when water is drained and the second washing drum is in a rinsing state when water is fed, or the first washing drum is in a washing state when water is drained and the second washing drum is fed with water, and the washing frequency of the first washing drum is less than that of the second washing drum, or the first washing drum is in a rinsing state when water is drained and the second washing drum is fed with water, and the rinsing frequency of the first washing drum is less than that of the second washing drum, or the turbidity of the water of the first washing drum exceeds a set value, the water of the first washing drum cannot be reused.

When the second washing drum reaches the drainage program, judging whether the first washing drum is draining or dehydrating at the moment, if so, starting to drain after the second washing drum waits until the first washing drum is dehydrated; if the first washing drum does not drain or dewater at the moment, whether the second washing drum needs to wait until the first washing drum finishes dewatering or not is judged.

After the technical scheme of the invention is adopted, the following beneficial effects are brought:

1. when one washing drum reaches the drainage procedure, if the other washing drum drains or dewaters or needs to drain or dewater within a certain time, the first washing drum does not drain water, the weight of the washing machine is increased, and the effect of adding a balance weight is achieved when the second washing drum dewaters, so that the damping effect is achieved.

2. The invention judges whether to wait for discharging water to another cylinder for repeated use when reaching the water discharging program according to the water discharging waiting time, has simple judgment and control logic, and has higher control stability in the actual washing program. Meanwhile, the water is fully and repeatedly utilized, the practical value is high, and the water-saving device can be effectively popularized and applied.

3. The invention increases the condition of judging that water can not be reused, and ensures the washing effect.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

FIG. 1: structure of double-drum washing machine

FIG. 2: flow chart of control method of the invention

FIG. 3: flow chart of control method of another embodiment of the invention

FIG. 4: flow chart of control method of another embodiment of the invention

FIG. 5: flow chart of control method of another embodiment of the invention

Wherein: 1. a first washing drum, 2 and a second washing drum.

Detailed Description

As shown in fig. 1, a dual drum washing machine is provided with a first washing tub 1 and a second washing tub 2 which can independently perform a laundry washing step. The first washing drum 1 and the second washing drum 2 can respectively and independently perform a water inlet program, a washing program, a water drainage program, a dehydration program, a rinsing program, a water drainage program and a dehydration program on the clothes in sequence so as to achieve the aim of washing the clothes. Preferably, the first washing drum and the second washing drum can be respectively provided with a drying device, so that after the dehydration program, the drying program is executed, and the purpose of drying the clothes in the first washing drum and/or the second washing drum is achieved. Preferably, the washing machine can also heat the washing water, a first heater for heating the washing water in the first washing drum is arranged in the first washing drum, and a second heater for heating the washing water in the second washing drum is arranged in the second washing drum. Therefore, during the washing program, the washing water in the washing drum is heated to control the water temperature in the washing process of the clothes, and the washing effect is improved.

According to the invention, the first washing cylinder is communicated with the second washing cylinder, water in the first washing cylinder can be discharged to the second washing cylinder for recycling after meeting a certain condition, water in the second washing cylinder can be discharged to the first washing cylinder for recycling after meeting a certain condition, and if the water does not meet the recycling condition, the water is directly discharged through the drain pipe, so that the utilization rate of the water is improved, the waste of a water source is avoided, meanwhile, a control process is added, the water is ensured to be recycled only when the water is cleaner, and the washing effect is ensured.

Example one

As shown in fig. 2, in the drainage control method of the multi-drum washing machine according to the embodiment, when the first washing drum reaches the drainage program, it is determined whether the second washing drum is draining or dehydrating at this time, and if the second washing drum is draining or dehydrating, the first washing drum drains water after the second washing drum finishes dehydrating; when the second washing drum is used for dewatering, water in the first washing drum is kept in the first washing drum, and the water in the first washing drum plays a role of a balance weight, so that the weight of the washing machine can be increased, and the damping effect is realized. Namely, the draining process and the dehydrating process of the second washing drum are performed together without being interrupted by other processes.

If the second washing drum does not drain or dehydrate at the moment, judging whether the first washing drum drains water again after waiting for the dehydration of the second washing drum. If the second washing drum is about to dewater immediately, the first washing drum can wait for the second washing drum to dewater and then drain, so that the problem that water in the first washing drum cannot absorb shock and is wasted under the condition that the first washing drum just drains water or the second washing drum begins to dewater shortly after the first washing drum drains water can be avoided. When the second washing drum is used for dewatering, water in the first washing drum is kept in the first washing drum, and the water in the first washing drum plays a role of a balance weight, so that the weight of the washing machine can be increased, and the damping effect is realized.

Judging whether the first washing drum needs to wait until the second washing drum finishes dewatering and then starts draining: the time from the second washing drum to the water drainage is T31, the time for the second washing drum to drain water is T32, the time for the second washing drum to dewater is T33, the time from the first washing drum to the next water drainage is T5, if T5 is less than T31+ T32, the water in the first washing drum is directly drained, the first washing drum is used for damping the dewatering water when the first washing drum drains the next water, and otherwise, the first washing drum is continuously judged to wait until the second washing drum finishes dewatering and then starts to drain water. The washing machine can avoid the phenomenon that the washing time of the first washing drum is too long due to the fact that the first washing drum always drains water after the second washing drum finishes dewatering, and if the next drainage of the first washing drum can be performed before the second washing drum finishes dewatering, the drainage of the first washing drum does not need to wait until the second washing drum finishes dewatering, the water drained next time by the first washing drum is reserved in the first washing drum, the water in the first washing drum plays a role of a counterweight, the weight of the washing machine can be increased, and the damping effect is achieved.

Judging whether to wait for the process of draining water again after the dehydration is finished: the time of the second washing drum from the water drainage is T31, the time of the second washing drum for water drainage is T32, the time of the second washing drum for water drainage is T33, an allowable waiting time T3 is set, if T31+ T32+ T33< T3, the first washing drum is drained after waiting for the second washing drum to finish the water drainage, and otherwise, the water in the first washing drum is directly drained. And setting the allowable waiting time, if the drainage waiting time of the first washing drum exceeds the allowable waiting time, the first washing drum does not wait until the second washing drum finishes dewatering, so that the phenomenon that the washing time of the first washing drum is too long when the drainage waiting time of the first washing drum is too long can be avoided, and the washing processes of the two washing drums are reasonably arranged.

When the first washing drum reaches the drainage program, whether the second washing drum is running at the moment is judged, if yes, whether the second washing drum is running or is about to execute the drainage or dehydration program is judged, and if not, the first washing drum directly executes the drainage program.

Since the water outlets of the first washing drum and the second washing drum are connected to the water outlet of the washing machine through pipelines, the whole washing machine has only one water outlet, the two washing machines drain water simultaneously, washing water can flow back due to pressure difference to pollute clothes, and the water outlet pipe is shared, and the speed of the water outlet are substantially the same, so that the first washing drum and the second washing drum cannot drain water simultaneously, and the water draining program of the second washing drum are executed together without interruption of other programs. And when the first washing drum is about to drain, judging whether the second washing drum is draining at the moment, if the second washing drum is draining at the moment, draining after the second washing drum finishes dewatering by the first washing drum, otherwise, directly draining the water of the first washing drum.

The invention is provided with two washing drums, wherein when one washing drum is used for dewatering, the weight of the washing machine can be increased by using water in the other washing drum, the vibration is reduced, when the first washing drum is about to drain water, whether the second washing drum is used for dewatering or not is judged, if the second washing drum is used for dewatering, the first washing drum waits for the drainage after the dewatering of the second washing drum is finished, and the vibration generated when the second washing drum is used for dewatering is reduced.

Meanwhile, water in the washing barrel can be recycled, if the first washing barrel is judged to wait until the second washing barrel is dehydrated, whether water needs to be fed after the second washing barrel is dehydrated is judged, if water does not need to be fed, the water in the first washing barrel is directly drained away, if water needs to be fed, whether the water in the first washing barrel can be recycled is judged, and if the water can be recycled, the water in the first washing barrel is drained into the second washing barrel.

And when judging whether the water in the first washing cylinder can be recycled, detecting the turbidity value or the foam concentration value of the water in the first washing cylinder, if the turbidity value or the foam concentration value is smaller than a set value, recycling the water in the first washing cylinder, otherwise, directly discharging the water, wherein the water in the first washing cylinder cannot be recycled.

When the first washing drum reaches the drainage program, whether the second washing drum is in operation or about to be operated for the last time of rinsing water inlet is judged, if yes, the water in the first washing drum is directly drained away, and if not, whether the water in the first washing drum can be reused is continuously judged.

And when the first washing drum reaches the drainage program, judging whether the first washing drum is drained for the last rinsing, if so, directly draining the water from the first washing drum, and if not, judging whether the water in the first washing drum can be recycled. Since a softener or a disinfectant may be added to the last rinsing and the second washing tub may not need the process, the laundry in the second washing tub is prevented from being affected, and if the last rinsing is drained, the water of the first washing tub is directly drained.

The first washing drum and the second washing drum are only numbered for convenience of description and are not in sequential relation, and when the second washing drum drains water, whether the first washing drum drains water or dehydrates at the moment or not can be judged, and if the first washing drum drains water or dehydrates, the second washing drum drains water after the first washing drum dehydrates; the water in the second washing drum plays a role of a counterweight, so that the weight of the washing machine can be increased, and the damping effect is realized.

If the first washing drum does not drain or dehydrate at the moment, whether the second washing drum drains water again after the first washing drum dehydrates is judged. The water of the second washing drum can be prevented from being wasted due to the fact that the water of the second washing drum cannot play a damping effect under the condition that the second washing drum just discharges water and the first washing drum just starts to dewater.

As shown in fig. 2, the control method of this embodiment is:

1) the first washing drum reaches a drainage program;

2) judging whether the second washing drum is in operation, if so, executing the step 3), and if not, executing the step 6);

3) judging whether the second washing drum is draining water, if not, executing the step 4), and if so, executing the step 5);

4) judging whether the second washing drum is dehydrating, if not, executing step 6), and if so, executing step 5);

5) the first washing drum waits for the second washing drum to dehydrate, and then the step 6 is carried out);

6) and draining water from the first washing drum.

The another control method in this embodiment is:

1) the first washing drum reaches a drainage program;

2) judging whether the second washing drum is in operation, if so, executing the step 3), and if not, executing the step 7);

3) judging whether the second washing drum is draining water, if not, executing the step 4), and if so, executing the step 6);

4) judging whether the second washing drum is dehydrating, if not, executing the step 5), and if so, executing the step 6);

5) determining the time T31 from the second washing drum to the water drainage, the time T32 from the second washing drum to the water drainage, the time T33 from the second washing drum to the water drainage, the time T5 from the first washing drum to the next water drainage, and if T5 is less than T31+ T32, executing the step 7), otherwise, executing the step 6);

6) the first washing drum waits for the second washing drum to finish the dehydration and enters the step 7);

7) and draining water from the first washing drum.

The another control method in this embodiment is:

1) the first washing drum reaches a drainage program;

5) determining the time of the second washing drum from the draining to be T31, the time of the second washing drum for draining to be T32 and the time of the second washing drum for dewatering to be T33, setting an allowable waiting time T3, and if T31+ T32+ T33< T3, executing step 6), otherwise, executing step 7);

7) and draining water from the first washing drum.

The another control method in this embodiment is:

1) the first washing drum reaches a drainage program;

2) judging whether the second washing drum is in operation, if so, executing the step 3), and if not, executing the step 8);

3) judging whether the second washing drum is draining water, if not, executing the step 4), and if so, executing the step 7);

4) judging whether the second washing drum is dehydrating, if not, executing the step 5), and if so, executing the step 7);

5) determining the time T31 from the second washing drum to the water drainage, the time T32 from the second washing drum to the water drainage, the time T33 from the second washing drum to the water drainage, the time T5 from the first washing drum to the next water drainage, and if T5 is less than T31+ T32, executing the step 8), otherwise, executing the step 6);

6) determining the time of the second washing drum from the draining to be T31, the time of the second washing drum for draining to be T32 and the time of the second washing drum for dewatering to be T33, setting an allowable waiting time T3, and if T31+ T32+ T33< T3, executing the step 7), otherwise, executing the step 8);

7) the first washing drum waits for the second washing drum to finish the dehydration and enters the step 8);

8) and draining water from the first washing drum.

As shown in fig. 3, another control method in this embodiment is:

1) the first washing drum reaches a drainage program;

2) judging whether the second washing drum is in operation, if so, executing the step 3), and if not, executing the step 12);

8) the first washing drum is ready for draining;

9) judging whether the second washing drum is filled with water, if so, executing the step 10), and if not, executing the step 12);

10) judging whether the water in the first washing drum can be recycled, if so, executing step 11), otherwise, executing step 12);

11) draining the water in the first washing cylinder into the second washing cylinder for reuse;

12) the water of the first washing drum is drained away.

Example two

The control method described in this embodiment adds a process of recycling the water of the first washing drum: as shown in fig. 3, the present embodiment uses the drainage waiting time as a determination criterion, determines whether to reuse water, and determines whether to wait for the water to be drained to another drum for reuse when reaching the drainage procedure according to the drainage waiting time. Meanwhile, the water is fully and repeatedly utilized, the practical value is high, and the water-saving device can be effectively popularized and applied.

When the first washing drum and the second washing drum are in a working state at the same time, the control method for recycling the water comprises the following steps:

a control method for recycling water of a multi-drum washing machine at least comprises a first washing drum and a second washing drum, when the first washing drum and the second washing drum are in a working state at the same time, when the first washing drum reaches a drainage program, the time T12 when the second washing drum reaches a water inlet program is compared with the time T11 when the first washing drum reaches the next drainage program, if T12 is less than T11, the first washing drum waits until the second washing drum enters the water, and if T12 is more than or equal to T11, the water of the first washing drum is directly drained away.

Comparing the time T12 when the second washing drum reaches the water inlet program with the time T11 when the first washing drum reaches the next water drainage program, judging whether the water in the first washing drum can be recycled, if not, directly draining the water in the first washing drum, if so, comparing the time T12 when the second washing drum reaches the water inlet program with the time T11 when the first washing drum reaches the next water drainage program;

or when the first washing drum waits for water to enter the second washing drum, judging whether the water in the first washing drum can be recycled, if not, directly draining the water in the first washing drum, and if so, draining the water in the first washing drum into the second washing drum, and recycling the water.

Specifically, the method comprises the following steps: step 1: the first washing drum reaches a drainage program, whether the water in the first washing drum can be recycled is judged, if yes, the step 2 is executed, and if not, the water in the first washing drum is directly drained away;

step 2: comparing the time T12 when the second washing drum reaches the water inlet program with the time T11 when the first washing drum reaches the next water discharge program, if T12 is less than T11, the first washing drum waits for water to enter the second washing drum, water in the first washing drum is discharged into the second washing drum, the water is recycled, and if T12 is more than or equal to T11, the water in the first washing drum is directly discharged. The waiting process of judging whether to wait is added, the water recycling probability of the first washing cylinder is increased to a large extent, and more water can be recycled.

In step 1, when the first washing drum reaches the water drainage procedure, if the second washing drum is feeding water, the time T12 when the second washing drum reaches the water feeding procedure is 0, and the water in the first washing drum is drained into the second washing drum without waiting, so that the water is recycled. Before comparing the time T12 when the second washing drum reaches the water inlet program with the time T11 when the first washing drum reaches the next water discharge program, it may be determined whether the second washing drum is performing the water inlet program, and if the second washing drum is not performing the water inlet program, the time T12 when the second washing drum reaches the water inlet program may be compared with the time T11 when the first washing drum reaches the next water discharge program.

In step 2, an allowable waiting time T1 is set, T1< T11, if T12< T1, the first washing drum waits until the second washing drum is filled with water, the water in the first washing drum is discharged into the second washing drum, the water is recycled, and if T12 is not less than T1, the water in the first washing drum is directly discharged. The step can avoid the first washing drum waiting too long, reasonably arrange the reuse of the drained water on the premise of ensuring the washing time of the first washing drum, avoid wasting too much time of the first washing drum because only the reuse water is considered, if the waiting time of the washing machine is judged to be too long and exceeds the set allowable waiting time, the water of the first washing drum is not reused, the judgment changes the reuse of the water more reasonable, and the relationship between the waiting time and the reuse of the water is coordinated to the maximum extent.

In the step 1, detecting a turbidity value or a foam concentration value of water in the first washing cylinder, if the turbidity value or the foam concentration value is smaller than a set value, the water in the first washing cylinder can be recycled, otherwise, the water in the first washing cylinder cannot be recycled, and directly draining the water. When the turbidity value or the foam concentration value of the water is in a set range, the water can be reused.

In step 1, the first washing drum reaches a water drainage program, whether the second washing drum is in operation or about to be operated for the last time of rinsing water inlet is judged, if yes, water in the first washing drum is directly drained away, and if not, whether the water in the first washing drum can be reused is continuously judged. The water inflow and the water inflow of the last rinsing are ensured, and the effect of the washed clothes is ensured.

In step 1, the first washing drum reaches a drainage program, whether the first washing drum is drained in the last rinsing or not is judged, if so, water in the first washing drum is directly drained away, and if not, whether the water in the first washing drum can be recycled or not is judged. Since a softener or a disinfectant may be added to the last rinsing and the second washing tub may not need the process, the laundry in the second washing tub is prevented from being affected, and if the last rinsing is drained, the water of the first washing tub is directly drained.

And 2, judging whether the second washing cylinder executes a washing water inlet program or not when the water of the first washing cylinder is discharged into the second washing cylinder, if so, firstly flushing water into the second washing cylinder by a detergent box, and after the flushing water into the second washing cylinder by the detergent box is finished, then discharging the water of the first washing cylinder into the second washing cylinder, and if not, directly discharging the water of the first washing cylinder into the second washing cylinder.

Step 2, when the water in the first washing cylinder is drained into the second washing cylinder, detecting the height of the water level in the second washing cylinder, and if the water level in the second washing cylinder reaches a set water level value, the water in the first washing cylinder is still water, and directly draining the residual water in the first washing cylinder; if the water level in the second washing cylinder does not reach the set water level value after all the water in the first washing cylinder is discharged into the second washing cylinder, purified water is fed into the second washing cylinder through the external water inlet.

When the water in the first washing drum is directly drained, whether the second washing drum is executing the drainage or dehydration program is judged, if yes, the first washing drum drains the water after waiting for the second washing drum to dehydrate, if not, the time of the second washing drum from the drainage is T31, the time of the second washing drum draining the water is determined to be T32, the time of the second washing drum dehydrating is determined to be T33, an allowable waiting time T3 is set, if T31+ T32+ T33 is less than T3, the first washing drum drains the water after waiting for the second washing drum to dehydrate, otherwise, the water in the first washing drum is directly drained.

In step 1, if the first washing cylinder is in a washing state when water is drained and the second washing cylinder is in a rinsing state when water is fed, or the first washing cylinder is in a washing state when water is drained and the second washing cylinder is in a water feeding state when water is fed, and the washing frequency of the first washing cylinder is less than that of the second washing cylinder, or the first washing cylinder is in a rinsing state when water is drained and the second washing cylinder is fed and the rinsing frequency of the first washing cylinder is less than that of the second washing cylinder, the water of the first washing cylinder cannot be reused.

When the second washing drum reaches the drainage program, whether the water in the second washing drum can be recycled is judged, if yes, the time when the first washing drum reaches the water inlet program and the time when the second washing drum reaches the next drainage program are compared, and whether the second washing drum waits until the first washing drum executes the water inlet program is judged.

The water outlet of the first washing cylinder is communicated with the second washing cylinder, water in the first washing cylinder can be discharged to the second washing cylinder for recycling, a water retaining valve is arranged at the water outlet of the first washing cylinder, water in the first washing cylinder can enter the second washing cylinder through the water retaining valve, a water inlet valve is arranged on the second washing cylinder, and external purified water can enter the second washing cylinder through the water inlet valve, wherein the control method comprises the following steps:

1) the first washing cylinder reaches a drainage program;

2) judging whether the water in the first washing drum is recycled, if so, executing the step 3), and if not, executing the step 6);

3) determining that the time from the first washing drum to the next water drainage program is T11, determining that the time from the second washing drum to the water inlet program is T12, if T12 is less than T11, executing the step 4), and if T12 is more than or equal to T11, executing the step 6);

4) the first washing cylinder waits for water to enter the second washing cylinder, and step 5) is executed;

5) the water in the first washing cylinder is discharged into the second washing cylinder;

6) and the water in the first washing cylinder is directly drained away.

The control method can also add a process of judging whether the second washing drum is intaking water before comparing the time that the first washing drum is away from the next drainage program and the time that the second washing drum is away from the water intake program, and the control method comprises the following steps:

1) the first washing cylinder reaches a drainage program;

2) judging whether the water in the first washing drum is recycled, if so, executing the step 3), and if not, executing the step 7);

3) judging whether the second washing drum is executing a water inlet program at the moment, if not, executing a step 4), and if so, executing a step 6);

4) determining that the time from the first washing drum to the next water drainage program is T11, determining that the time from the second washing drum to the water inlet program is T12, if T12 is less than T11, executing step 5), and if T12 is more than or equal to T11, executing step 7);

5) the first washing cylinder waits for water to enter the second washing cylinder, and step 6) is executed;

6) the water in the first washing cylinder is discharged into the second washing cylinder;

7) and the water in the first washing cylinder is directly drained away.

The control method can also comprise the step of judging whether the first washing drum has enough time to wait for the second washing drum to be filled with water, and the control method comprises the following steps:

1) the first washing cylinder reaches a drainage program;

2) judging whether the water in the first washing drum is recycled, if so, executing the step 3), and if not, executing the step 8);

3) judging whether the second washing drum is executing a water inlet program at the moment, if not, executing a step 4), and if so, executing a step 7);

4) determining that the time from the first washing drum to the next water drainage program is T11, determining that the time from the second washing drum to the water inlet program is T12, if T12 is less than T11, executing step 5), and if T12 is more than or equal to T11, executing step 8);

5) setting an allowable waiting time T1, if T12< T1, executing step 6), and if T12 is more than or equal to T1, executing step 8);

6) the first washing cylinder waits for water to enter the second washing cylinder, and step 7) is executed;

7) the water in the first washing cylinder is discharged into the second washing cylinder;

8) and the water in the first washing cylinder is directly drained away.

The water of the first washing drum cannot be reused if the first washing drum is dirty, or the second washing drum is the last rinsing water and cannot be reused, and the control method comprises the following steps:

1) the first washing cylinder reaches a drainage program;

2) detecting the turbidity value or the foam concentration value of the water in the first washing cylinder, and judging whether the turbidity value or the foam concentration value is smaller than a set value;

if yes, executing step 3), if not, executing step 9);

3) judging whether the second washing drum only has water inflow for the last rinsing, if not, executing the step 4), if so, executing the step 9), judging whether the first washing drum is the last rinsing and water drainage, if not, executing the step 4), and if so, executing the step 9);

4) judging whether the second washing drum is executing a water inlet program at the moment, if not, executing the step 5), and if so, executing the step 8);

5) determining that the time from the first washing drum to the next water drainage program is T11, determining that the time from the second washing drum to the water inlet program is T12, if T12 is less than T11, executing step 6), and if T12 is more than or equal to T11, executing step 9);

6) setting an allowable waiting time T1, if T12< T1, executing the step 7), and if T12 is more than or equal to T1, executing the step 9);

7) the first washing cylinder waits for water to enter the second washing cylinder, and step 8) is executed;

8) the water in the first washing cylinder is discharged into the second washing cylinder;

9) and the water in the first washing cylinder is directly drained away.

When water in the first washing drum is drained into the second washing drum, if the second washing drum is used for washing water, the detergent box needs to be washed, and the water level needs to be detected, wherein the control method comprises the following steps:

1) the first washing cylinder reaches a drainage program;

2) detecting the turbidity value or the foam concentration value of the water in the first washing cylinder, judging whether the turbidity value or the foam concentration value is smaller than a set value or not,

if yes, executing step 3), if not, executing step 12);

3) judging whether the second washing drum only has water left for the last rinsing, if not, executing the step 4), and if so, executing the step 12);

4) judging whether the second washing drum is executing a water inlet program at the moment, if not, executing the step 5), and if so, executing the step 10);

5) determining that the time from the first washing drum to the next water drainage program is T11, determining that the time from the second washing drum to the water inlet program is T12, if T12 is less than T11, executing step 6), and if T12 is more than or equal to T11, executing step 12);

6) setting an allowable waiting time T1, if T12< T1, executing the step 7), and if T12 is more than or equal to T1, executing the step 12);

7) judging whether the second washing drum executes a washing water inlet program or not, if so, executing a step 8), and if not, executing a step 10);

8) the second washing drum firstly washes a detergent box to supply water, and after the washing of the detergent box of the second washing drum finishes, step 9) is executed;

9) the first washing cylinder waits for water to enter the second washing cylinder, and step 10) is executed;

10) the water in the first washing cylinder is discharged into the second washing cylinder;

11) detecting the height of the water level in the second washing cylinder, and directly draining the residual water if water still exists in the first washing cylinder when the water level in the second washing cylinder reaches a set water level value; if the water level in the second washing cylinder does not reach the set water level value after all the water in the first washing cylinder is discharged into the second washing cylinder, water is supplied to the second washing cylinder through an external water inlet;

12) and the water in the first washing cylinder is directly drained away.

In this embodiment, the first washing cylinder and the second washing cylinder are only numbered for convenience of description, and are not sequentially related, and water in the second washing cylinder can be reused, a water outlet of the second washing cylinder is communicated with the first washing cylinder, water in the second washing cylinder can be discharged to the first washing cylinder for reuse, a water outlet of the second washing cylinder is provided with a water retaining valve, water in the second washing cylinder can enter the first washing cylinder through the water retaining valve, the first washing cylinder is provided with a water inlet valve, external clean water can enter the first washing cylinder through the water inlet valve, one washing cylinder reaches water drainage, whether water in the washing cylinder is discharged into the other washing cylinder for reuse is judged, the water in the other washing cylinder is not considered for reuse when the other washing cylinder reaches water drainage, and dead circulation caused by waiting of the two cylinders is avoided. The control method comprises the following steps:

1) the second washing cylinder reaches the drainage program;

2) judging whether the water in the second washing drum is recycled, if so, executing the step 3), and if not, executing the step 6);

3) determining that the time from the second washing drum to the next water drainage program is T11, determining that the time from the first washing drum to the water inlet program is T12, if T12 is less than T11, executing step 4), and if T12 is more than or equal to T11, executing step 6);

4) the second washing cylinder waits for water to enter the first washing cylinder, and step 5) is executed;

5) the water in the second washing cylinder is discharged into the first washing cylinder;

6) and the water in the second washing cylinder is directly drained away.

The control method can also add a process of judging whether the first washing drum is intaking water before comparing the time of the second washing drum from the next time of executing the water drainage program with the time of the first washing drum from the time of executing the water inlet program, and the control method comprises the following steps:

1) the second washing cylinder reaches the drainage program;

2) judging whether the water in the second washing drum is recycled, if so, executing the step 3), otherwise, executing the step 7),

3) judging whether the first washing drum is executing a water inlet program at the moment, if not, executing a step 4), and if so, executing a step 6);

4) determining that the time from the second washing drum to the next water drainage program is T11, determining that the time from the first washing drum to the water inlet program is T12, if T12 is less than T11, executing step 5), and if T12 is more than or equal to T11, executing step 7);

5) the second washing cylinder waits for water to enter the first washing cylinder, and step 6) is executed;

6) the water in the second washing cylinder is discharged into the first washing cylinder;

7) and the water in the second washing cylinder is directly drained away.

The control method can also comprise the step of judging whether the second washing drum has enough time to wait for the first washing drum to be filled with water, and the control method comprises the following steps:

1) the second washing cylinder reaches the drainage program;

2) judging whether the water in the second washing drum is recycled, if so, executing the step 3), and if not, executing the step 8);

3) judging whether the first washing drum is executing a water inlet program at the moment, if not, executing a step 4), and if so, executing a step 7);

4) determining that the time from the second washing drum to the next water drainage program is T11, determining that the time from the first washing drum to the water inlet program is T12, if T12 is less than T11, executing step 5), and if T12 is more than or equal to T11, executing step 8);

6) the second washing cylinder waits for water to enter the first washing cylinder, and step 7) is executed;

7) the water in the second washing cylinder is discharged into the first washing cylinder;

8) and the water in the second washing cylinder is directly drained away.

The water of the second washing drum can not be reused if the second washing drum is dirty, or the first washing drum is the last rinsing water and can not be reused, and the control method comprises the following steps:

1) the second washing cylinder reaches the drainage program;

2) detecting the turbidity value or the foam concentration value of the water in the second washing cylinder, judging whether the turbidity value or the foam concentration value is smaller than a set value or not,

if yes, executing step 3), if not, executing step 9);

3) judging whether the first washing drum only has water for the last rinsing, if not, executing the step 4), if so, executing the step 9), judging whether the second washing drum has water for the last rinsing, if not, executing the step 4), and if so, executing the step 9);

4) judging whether the first washing drum is executing a water inlet program at the moment, if not, executing the step 5), and if so, executing the step 8);

5) determining that the time from the second washing drum to the next water drainage program is T11, determining that the time from the first washing drum to the water inlet program is T12, if T12 is less than T11, executing step 6), and if T12 is more than or equal to T11, executing step 9);

7) the second washing cylinder waits for water to enter the first washing cylinder, and step 8) is executed;

8) the water in the second washing cylinder is discharged into the first washing cylinder;

9) and the water in the second washing cylinder is directly drained away.

When water in the second washing cylinder is discharged into the first washing cylinder, if the first washing cylinder is used for washing water, the detergent box needs to be flushed, and the water level needs to be detected, wherein the control method comprises the following steps:

1) the second washing cylinder reaches the drainage program;

if yes, executing step 3), if not, executing step 12);

3) judging whether the first washing drum only has water for the last rinsing, if not, executing the step 4), and if so, executing the step 12);

4) judging whether the first washing drum is executing a water inlet program at the moment, if not, executing the step 5), and if so, executing the step 10);

5) determining that the time from the second washing drum to the next water drainage program is T11, determining that the time from the first washing drum to the water inlet program is T12, if T12 is less than T11, executing step 6), and if T12 is more than or equal to T11, executing step 12);

7) judging whether the first washing drum executes a washing water inlet program or not, if so, executing a step 8), and if not, executing a step 10);

8) the first washing drum firstly washes a detergent box to supply water, and after the washing of the detergent box of the first washing drum is finished, the step 9) is executed;

9) the second washing cylinder waits for water to enter the first washing cylinder, and step 10) is executed;

10) the water in the second washing cylinder is discharged into the first washing cylinder;

11) detecting the height of the water level in the first washing cylinder, and directly draining the residual water if water still exists in the second washing cylinder when the water level in the first washing cylinder reaches a set water level value; if the water level in the first washing cylinder does not reach the set water level value after all the water in the second washing cylinder is discharged into the first washing cylinder, water is supplied to the first washing cylinder through an external water inlet;

12) and the water in the second washing cylinder is directly drained away.

EXAMPLE III

As shown in fig. 5, in the present embodiment, the water inlet waiting time is used as a criterion to determine whether to reuse water, and whether to reuse water when waiting for another water inlet procedure when the water inlet procedure is reached is determined according to the water inlet waiting time. Meanwhile, the water is fully and repeatedly utilized, the practical value is high, and the water-saving device can be effectively popularized and applied.

a control method for recycling water of a multi-drum washing machine at least comprises a first washing drum and a second washing drum, wherein when the first washing drum and the second washing drum are in a working state at the same time, the control method for recycling water comprises the following steps: when the first washing drum reaches the water inlet program, comparing the time T22 when the second washing drum reaches the water discharge program with the time T21 when the first washing drum reaches the next water inlet program, if T22 is not less than T21, the first washing drum directly feeds water, and if T22 is less than T21, the first washing drum waits for the second washing drum to discharge water.

Comparing the time T22 when the second washing drum reaches the drainage program with the time T21 when the first washing drum reaches the next water inlet program, before, judging whether the water in the second washing drum can be reused, if not, directly feeding clean water into the first washing drum, if so, comparing the time T22 when the second washing drum reaches the drainage program with the time T21 when the first washing drum reaches the next water inlet program; or when the first washing cylinder waits until the second washing cylinder drains water, whether the water in the second washing cylinder can be recycled is judged, if not, the first washing cylinder directly feeds clean water, and if so, the water in the second washing cylinder is drained into the first washing cylinder for recycling.

Specifically, the method comprises the following steps: step 1: the first washing cylinder reaches the water inlet program, the time T22 when the second washing cylinder reaches the water discharge program is compared with the time T21 when the first washing cylinder reaches the next water inlet program, if T22 is not less than T21, the first washing cylinder directly enters purified water, if T22 is less than T21, the first washing cylinder waits until the second washing cylinder discharges water, and step 2 is executed;

step 2: and judging whether the water in the second washing cylinder can be recycled, if so, discharging the water in the second washing cylinder into the first washing cylinder for recycling, and if not, directly feeding the purified water into the first washing cylinder. The process of judging whether to wait is added, the water recycling probability of the second washing drum is increased to a large extent, and more water can be recycled.

In step 1, if the second washing drum is draining water when the first washing drum reaches the water inlet procedure, the time T22 when the second washing drum reaches the water drainage procedure is 0, and step 2 is directly performed without waiting. Before comparing the time T22 when the second washing drum reaches the draining process with the time T21 when the first washing drum reaches the next water inlet process, it may be determined whether the second washing drum is performing the draining process, and if the second washing drum is not performing the draining process, the time T22 when the second washing drum reaches the draining process may be compared with the time T21 when the first washing drum reaches the next water inlet process.

In step 1, an allowable waiting time T2 is set, T2< T21, if T22< T2, the first washing drum waits until the second washing drum is drained, step 2 is executed, and if T22 is more than or equal to T2, the first washing drum directly feeds water. The step can avoid the first washing drum waiting too long, reasonably arrange the reuse of the drained water on the premise of ensuring the washing time of the first washing drum, avoid wasting too much time of the first washing drum because only the reuse water is considered, if the waiting time of the washing machine is judged to be too long and exceeds the set allowable waiting time, the first washing drum does not reuse the water of the second washing drum, the judgment changes the reuse of the water more reasonable, and the relationship between the waiting time and the reuse of the water is coordinated to the maximum extent.

And 2, detecting the turbidity value or the foam concentration value of the water in the second washing cylinder, wherein if the turbidity value or the foam concentration value is smaller than a set value, the water in the second washing cylinder can be recycled, otherwise, the water in the second washing cylinder cannot be recycled. When the turbidity value or the foam concentration value of the water is in a set range, the water can be reused.

And 2, judging whether the second washing cylinder is drained for the last rinsing, if so, directly draining water of the second washing cylinder, directly feeding clean water into the first washing cylinder, and if not, judging whether the water of the second washing cylinder can be recycled. Since the last rinsing may be performed with a softener or a disinfectant, etc., and the first washing tub may not need the process, the laundry in the first washing tub is prevented from being affected, and if the second washing tub is drained in the last rinsing, the water of the second washing tub directly drains the water, and the first washing tub directly supplies the water.

In step 1, when the first washing drum reaches the water inlet program, whether the water inlet program which is started to be executed is the last rinsing water inlet is judged, if yes, the first washing drum directly enters the purified water, and if not, the time T22 when the second washing drum reaches the water drainage program and the time T21 when the first washing drum reaches the next water inlet program are continuously compared. The water inflow and the water inflow of the last rinsing are ensured, and the effect of the washed clothes is ensured.

And 2, judging whether the first washing cylinder executes a washing water inlet program or not when water in the second washing cylinder is discharged into the first washing cylinder, if so, flushing water in the first washing cylinder by a detergent box, and after the flushing water in the first washing cylinder by the detergent box is finished, discharging the water in the second washing cylinder into the first washing cylinder, otherwise, directly discharging the water in the second washing cylinder into the first washing cylinder.

Step 2, when water in the second washing cylinder is discharged into the first washing cylinder, detecting the height of the water level in the first washing cylinder, and if the water level in the first washing cylinder reaches a set water level value, water is still in the second washing cylinder, and directly discharging the residual water in the second washing cylinder; if the water level in the first washing cylinder does not reach the set water level value after all the water in the second washing cylinder is discharged into the first washing cylinder, the first washing cylinder is used for feeding purified water.

When the water in the second washing drum is directly drained, whether the first washing drum executes the drainage or dehydration program is judged, if yes, the second washing drum drains the water after waiting for the first washing drum to dehydrate, if not, the time of the first washing drum from the drainage is T41, the time of the first washing drum draining the water is determined to be T42, the time of the first washing drum dehydrating is determined to be T43, an allowable waiting time T4 is set, if T41+ T42+ T43 is less than T4, the second washing drum drains the water after waiting for the first washing drum to dehydrate, otherwise, the water in the second washing drum is directly drained.

In step 2, if the second washing cylinder is in the washing state when discharging water and the first washing cylinder is in the rinsing state when water enters, or the second washing cylinder is in the washing state when discharging water and the first washing cylinder is in the water entering state when water enters, and the washing frequency of the second washing cylinder is less than that of the first washing cylinder, or the second washing cylinder is in the rinsing state when water is discharged and the first washing cylinder is in the water entering state when water enters, and the rinsing frequency of the second washing cylinder is less than that of the first washing cylinder, the water in the first washing cylinder cannot be reused.

When the second washing drum reaches the water inlet program, the time when the first washing drum reaches the water discharge program is compared with the time when the second washing drum reaches the next water inlet program, and whether the second washing drum waits for the first washing drum to discharge water is judged.

The water outlet of the second washing cylinder is communicated with the first washing cylinder, water in the second washing cylinder can be discharged to the first washing cylinder for recycling, a water retaining valve is arranged at the water outlet of the second washing cylinder, water in the second washing cylinder can enter the first washing cylinder through the water retaining valve, a water inlet valve is arranged on the first washing cylinder, and external purified water can enter the first washing cylinder through the water inlet valve, the control method comprises the following steps:

1) the first washing cylinder reaches a water inlet program;

3) determining that the time from the first washing drum to the next water inlet program is T21, determining that the time from the second washing drum to the water outlet program is T22, if T22 is less than T21, executing the step 4), and if T22 is more than or equal to T21, executing the step 6);

4) the first washing drum waits for the second washing drum to drain water, and step 5) is executed;

6) the first washing drum directly feeds the purified water, and the water in the second washing drum is directly drained away.

The control method can also add a process of judging whether the second washing drum is draining before comparing the time T22 when the second washing drum reaches the draining program with the time T21 when the first washing drum reaches the next water inlet program, and the control method is as follows:

1) the first washing cylinder reaches a water inlet program;

2) judging whether the water in the second washing drum is recycled, if so, executing the step 3), and if not, executing the step 7);

3) judging whether the second washing drum is executing the drainage program at the moment, if not, executing the step 4), and if so, executing the step 6);

4) determining that the time from the first washing drum to the next water inlet program is T21, determining that the time from the second washing drum to the water outlet program is T22, if T22 is less than T21, executing the step 5), and if T22 is more than or equal to T21, executing the step 7);

5) the first washing drum waits for the second washing drum to drain water, and step 6 is executed)

7) the first washing drum directly feeds the purified water, and the water in the second washing drum is directly drained away.

The control method can also comprise the step of judging whether the first washing drum has enough time to wait for the second washing drum to drain water, and the control method comprises the following steps:

1) the first washing cylinder reaches a water inlet program;

3) judging whether the second washing drum is executing the drainage program at the moment, if not, executing the step 4), and if so, executing the step 7);

4) determining that the time from the first washing drum to the next water inlet program is T21, determining that the time from the second washing drum to the water outlet program is T22, if T22 is less than T21, executing the step 5), and if T22 is more than or equal to T21, executing the step 8);

5) setting an allowable waiting time T2, if T22< T2, executing step 6), and if T22 is more than or equal to T2, executing step 8);

6) the first washing drum waits for the second washing drum to drain water, and step 7) is executed;

8) the first washing drum directly feeds the purified water, and the water in the second washing drum is directly drained away.

1) the first washing cylinder reaches a water inlet program;

2) judging whether the first washing drum only has water for the last rinsing, if not, executing the step 3), and if so, executing the step 9);

4) determining that the time from the first washing drum to the next water inlet program is T21, determining that the time from the second washing drum to the water outlet program is T22, if T22 is less than T21, executing the step 5), and if T22 is more than or equal to T21, executing the step 9);

5) setting an allowable waiting time T2, if T22< T2, executing step 6), and if T22 is more than or equal to T2, executing step 9);

7) detecting the turbidity value or the foam concentration value of the water in the second washing cylinder, judging whether the turbidity value or the foam concentration value is smaller than a set value or not,

if yes, executing step 8), if not, executing step 9), judging whether the second washing drum is drained for the last rinsing, if not, executing step 8), and if yes, executing step 9);

9) the first washing drum directly feeds the purified water, and the water in the second washing drum is directly drained away.

1) the first washing cylinder reaches a water inlet program;

2) judging whether the first washing drum only has water for the last rinsing, if not, executing the step 3), and if so, executing the step 12);

4) determining that the time from the first washing drum to the next water inlet program is T21, determining that the time from the second washing drum to the water outlet program is T22, if T22 is less than T21, executing the step 5), and if T22 is more than or equal to T21, executing the step 12);

5) setting an allowable waiting time T2, if T22< T2, executing step 6), and if T22 is more than or equal to T2, executing step 12);

if yes, executing step 8), if not, executing step 12);

8) judging whether the first washing drum executes a washing water inlet program or not, if so, executing a step 9), and if not, executing a step 10);

9) the first washing drum firstly washes a detergent box to supply water, and after the washing of the detergent box of the first washing drum is finished, the step 10) is executed;

12) the first washing drum directly feeds the purified water, and the water in the second washing drum is directly drained away.

In this embodiment, the first washing cylinder and the second washing cylinder are only numbered for convenience of description, and are not sequentially related, and water in the first washing cylinder can be reused, a water inlet of the second washing cylinder is communicated with a water outlet of the first washing cylinder, water in the first washing cylinder can be discharged to the second washing cylinder for reuse, a water retaining valve is arranged at a water outlet of the first washing cylinder, water in the first washing cylinder can enter the second washing cylinder through the water retaining valve, a water inlet valve is arranged on the second washing cylinder, external clean water can enter the second washing cylinder through the water inlet valve, one of the washing cylinders enters water, it is determined whether water in the other washing cylinder is discharged into the washing cylinder for reuse, the water in the other washing cylinder does not need to be reused when reaching the water inlet, and dead cycle caused by waiting for both the washing cylinders is avoided.

The control method comprises the following steps:

1) the second washing cylinder reaches the water inlet program;

3) determining that the time from the second washing drum to the next water inlet program is T21, determining that the time from the first washing drum to the water outlet program is T22, if T22 is less than T21, executing the step 4), and if T22 is more than or equal to T21, executing the step 6);

4) the second washing drum waits for the first washing drum to drain water, and step 5) is executed;

6) the second washing cylinder directly feeds the purified water, and the water in the first washing cylinder is directly drained away.

The control method can also add a process of judging whether the first washing drum is draining before comparing the time T22 when the second washing drum reaches the draining program with the time T21 when the first washing drum reaches the next water inlet program, and the control method is as follows:

1) the second washing cylinder reaches the water inlet program;

3) judging whether the first washing drum is executing the drainage program at the moment, if not, executing the step 4), and if so, executing the step 6);

4) determining that the time from the second washing drum to the next water inlet program is T21, determining that the time from the first washing drum to the water outlet program is T22, if T22 is less than T21, executing step 5), and if T22 is more than or equal to T21, executing step 7);

5) the second washing drum waits for the first washing drum to drain water, and step 6) is executed;

7) the second washing cylinder directly feeds the purified water, and the water in the first washing cylinder is directly drained away.

The control method can also comprise the step of judging whether the second washing drum has enough time to wait for the first washing drum to drain water, and the control method comprises the following steps:

1) the second washing cylinder reaches the water inlet program;

3) judging whether the first washing drum is executing the drainage program at the moment, if not, executing the step 4), and if so, executing the step 7);

4) determining that the time from the second washing drum to the next water inlet program is T21, determining that the time from the first washing drum to the water outlet program is T22, if T22 is less than T21, executing the step 5), and if T22 is more than or equal to T21, executing the step 8);

6) the second washing drum waits for the first washing drum to drain water, and step 7) is executed;

8) the second washing cylinder directly feeds the purified water, and the water in the first washing cylinder is directly drained away.

1) the second washing cylinder reaches the water inlet program;

2) judging whether the second washing drum only has water for the last rinsing, if not, executing the step 3), and if so, executing the step 9);

4) determining that the time from the second washing drum to the next water inlet program is T21, determining that the time from the first washing drum to the water outlet program is T22, if T22 is less than T21, executing the step 5), and if T22 is more than or equal to T21, executing the step 9);

7) detecting the turbidity value or the foam concentration value of the water in the first washing cylinder, judging whether the turbidity value or the foam concentration value is smaller than a set value or not,

if yes, executing step 8), if not, executing step 9), judging whether the first washing drum is the last rinsing drainage, if not, executing step 8), and if yes, executing step 9);

9) the second washing cylinder directly feeds the purified water, and the water in the first washing cylinder is directly drained away.

1) the second washing cylinder reaches the water inlet program;

2) judging whether the second washing drum only has water left for the last rinsing, if not, executing the step 3), and if so, executing the step 12);

4) determining that the time from the second washing drum to the next water inlet program is T21, determining that the time from the first washing drum to the water outlet program is T22, if T22 is less than T21, executing step 5), and if T22 is more than or equal to T21, executing step 12);

if yes, executing step 8), if not, executing step 12);

8) judging whether the second washing drum executes a washing water inlet program or not, if so, executing a step 9), and if not, executing a step 10);

9) the second washing drum firstly washes a detergent box to supply water, and after the washing of the detergent box of the second washing drum finishes, the step 10) is executed;

12) the second washing cylinder directly feeds the purified water, and the water in the first washing cylinder is directly drained away.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the principle of the present invention, which should also be regarded as the protection scope of the present invention.

Claims

1. A drainage control method of a multi-drum washing machine including at least a first washing drum and a second washing drum, characterized in that:

when the first washing drum reaches the drainage program, judging whether the second washing drum is draining or dehydrating at the moment, if so, judging whether water needs to be fed after the second washing drum is dehydrated, if so, judging whether the water in the first washing drum can be recycled, and if so, discharging the water into the second washing drum after the first washing drum waits until the second washing drum is dehydrated; if the second washing drum does not need to be supplied with water after the dehydration is finished, or the water in the first washing drum can not be reused, the first washing drum waits until the second washing drum completes the dehydration and then discharges the water out of the washing machine;

if the second washing drum does not drain or dehydrate at the moment, judging whether the first washing drum needs to wait until the second washing drum dehydrates and then starts draining; if the first washing drum needs to wait until the second washing drum finishes dewatering and then starts draining, whether water needs to be fed after the second washing drum finishes dewatering is judged, if the water does not need to be fed, the water in the first washing drum is directly drained out of the washing machine after the second washing drum finishes dewatering, if the water needs to be fed, whether the water in the first washing drum can be recycled is judged, and if the water can be recycled, the water in the first washing drum is drained into the second washing drum after the second washing drum finishes dewatering.

2. The drain control method of a multi-tub washing machine according to claim 1, characterized in that: and if T5 is less than T31+ T32, the water in the first washing drum is directly drained, otherwise, whether the first washing drum needs to wait until the second washing drum finishes the dewatering and then begins to drain is continuously judged.

3. The drain control method of a multi-tub washing machine according to claim 1 or 2, characterized in that: and if T31+ T32+ T33< T3, controlling the first washing drum to drain water to the second washing drum or/and directly draining the water to the washing machine according to whether the water in the first washing drum can be reused or not, otherwise, directly draining the water in the first washing drum to the washing machine.

4. The drain control method of a multi-tub washing machine according to claim 1, characterized in that: when the first washing drum reaches the drainage program, whether the second washing drum is running at the moment is judged firstly, if not, the first washing drum directly executes the drainage program, and if so, whether the second washing drum is draining or dehydrating at the moment is continuously judged.

5. The drain control method of a multi-tub washing machine according to claim 1, characterized in that: if the second wash drum is running or is about to run for the last rinse intake, the water from the first wash drum may not be reused.

6. The drain control method of a multi-tub washing machine according to claim 1, characterized in that: if the first wash drum is drained for the last rinse, the water of the first wash drum may not be reused.

7. The drain control method of a multi-tub washing machine according to claim 1, characterized in that: if the first washing drum is in a washing state when water is drained and the second washing drum is in a rinsing state when water is fed, or the first washing drum is in a washing state when water is drained and the second washing drum is fed with water, and the washing frequency of the first washing drum is less than that of the second washing drum, or the first washing drum is in a rinsing state when water is drained and the second washing drum is fed with water, and the rinsing frequency of the first washing drum is less than that of the second washing drum, or the turbidity of the water of the first washing drum exceeds a set value, the water of the first washing drum cannot be reused.

8. The drain control method of a multi-tub washing machine according to claim 1, characterized in that: when the second washing drum reaches the drainage program, judging whether the first washing drum is draining or dehydrating at the moment, if so, starting to drain after the second washing drum waits until the first washing drum is dehydrated; if the first washing drum does not drain or dewater at the moment, whether the second washing drum needs to wait until the first washing drum finishes dewatering or not is judged.