Double-drum washing machine control method and double-drum washing machine

Abstract

The present invention provides a control method for a dual-drum washing machine. The dual-drum washing machine comprises two water drums. When the first water drum performs a rapid drain cycle, a portion of the drain water from the first drum flows into the second drum and is discharged through the second drum's drain port. This control method allows the drain water from either drum of the dual-drum washing machine to be simultaneously discharged through the connecting water passages of the two drums, thereby improving the washing machine's drain rate. The present invention also provides a dual-drum washing machine employing this control method.

Description

Technical Field

[0001] The present invention belongs to the technical field of clothing processing equipment, and specifically relates to a washing machine with multiple drums, and more particularly to a drainage control method for a double-drum washing machine. Background Art

[0002] Currently, most drum washing machines on the market have only one washing drum. As people's awareness of hygiene increases, more and more users need to wash different types of clothes separately or wash a small amount of clothes in a timely manner.

[0003] As people's quality of life improves, their awareness of hygiene is also growing. This is especially true when it comes to home laundry, with more and more people washing clothes separately. Using existing washing machines for multiple loads of laundry doesn't allow for the required washing time. Buying two or more washing machines for simultaneous washing not only wastes energy and water but also takes up a lot of space, making it unsuitable for home use. Therefore, multi-drum washing machines can meet these needs and address the energy, water, and space waste.

[0004] Patent CN201120326451.6 discloses a washing machine comprising at least two water drums, which are connected by a connecting pipe and provided with a control valve and / or a water pump. The control valve and / or the water pump are used to achieve a controllable interactive flow of washing water in the two water drums, so as to realize the purpose of mutual utilization of washing water between the two drums.

[0005] However, when the existing double-drum washing machine performs the drainage process, the two water drums are drained through the drainage pipes connected to their respective drainage outlets, which makes the drainage mode of the double-drum washing machine relatively simple and has the problem of too slow drainage rate.

[0006] In view of this, the present invention is proposed. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a control method for a double-drum washing machine, so that the drainage water flow of one water drum of the washing machine can be drained synchronously through the drainage channels connected to the two water drums respectively, so as to achieve the purpose of improving the drainage rate of the washing machine.

[0008] In order to achieve the above-mentioned purpose, the basic concept of the technical solution adopted by the present invention is:

[0009] The present invention provides a control method for a double-drum washing machine, which includes two water drums. When a quick drainage program is executed in the first water drum, part of the drainage water flow of the first water drum flows into the second water drum and is discharged from the drainage port of the second water drum.

[0010] Furthermore, when the first water cylinder executes the quick drainage program, the drain outlet of the first water cylinder is connected to the first drain pipe and the water inlet of the second water cylinder at the same time, and the drain outlet of the second water cylinder is connected to the second drain pipe; when the first water cylinder executes the normal drainage program, the drain outlet of the first water cylinder is only connected to the first drain pipe.

[0011] Furthermore, before part of the drainage from the first water tank flows to the second water tank, it is determined whether the turbidity D1 of the water in the first water tank is greater than the turbidity D2 of the water in the second water tank; if so, the first water tank continues to perform the fast drainage procedure; if not, the first water tank starts to perform the normal drainage procedure.

[0012] Furthermore, before the first water drum executes the quick drainage program, the time t1 required for the second water drum to reach the starting node of the drainage program is detected; it is determined whether t1 is less than the set value t. If so, the first water drum suspends the execution of the drainage program, and after time t1, it starts the drainage program synchronously with the second water drum, and the drain outlet of the first water drum is respectively connected to the first drain pipe of the washing machine and the water inlet of the second water drum, and the drain outlet of the second water drum is connected to the second drain pipe; if not, the first water drum directly starts to execute the normal drainage program, and the drain outlet of the first water drum is only connected to the first drain pipe of the washing machine.

[0013] Furthermore, before the first water drum executes the quick drainage program, the time t2 required for the drainage program of the first water drum is calculated, and the time t1 required for the second water drum to reach the starting node of the drainage program is detected; it is determined whether t1 is less than the set value t2; if so, the first water drum suspends the execution of the drainage program, and after time t1, it starts the drainage program synchronously with the second water drum, the drain outlet of the first water drum is respectively connected to the first drain pipe of the washing machine and the water inlet of the second water drum, and the drain outlet of the second water drum is connected to the second drain pipe; if not, the first water drum starts to execute the normal drainage program, and the drain outlet of the first water drum is only connected to the first drain pipe of the washing machine.

[0014] Furthermore, when the first water storage drum is executing the quick drainage program, it is determined whether the second water storage drum is executing the drainage program; if so, the first water storage drum is controlled to continue executing the quick drainage program.

[0015] Furthermore, when the first water holding drum executes the quick drainage program, the second rotating drum in the second water holding drum is controlled to rotate, and the load in the second rotating drum is rinsed by the drainage water flowing through.

[0016] Furthermore, when the first water cylinder executes the drainage program, it is determined whether the second water cylinder is working; if not, the first water cylinder directly starts to execute the quick drainage program, and controls the drain outlet of the first water cylinder to be connected to the first drain pipe and the water inlet of the second water cylinder at the same time, and the drain outlet of the second water cylinder to be connected to the second drain pipe. Part of the drainage of the first water cylinder is directly discharged through the first drain pipe, and part of it flows through the second water cylinder and then is discharged through the second drain pipe.

[0017] The present invention also provides a double-drum washing machine adopting the above-mentioned control method, comprising a first water drum and a second water drum; the drain outlet of the first water drum is connected to the inlet of a three-way valve, the two outlets of the three-way valve are respectively connected to the water inlet of the second water drum and the first drain pipe of the washing machine, the inlet of the three-way valve can be connected to one of the two outlets or simultaneously; the drain outlet of the second water drum is connected to the second drain pipe of the washing machine.

[0018] Furthermore, the first water storage cylinder and the second water storage cylinder are respectively provided with turbidity sensors for detecting the turbidity of the water in the cylinder.

[0019] Furthermore, the drain outlet of the second water drum is connected to the inlet of the second three-way valve, and the two outlets of the second three-way valve are respectively connected to the water inlet of the first water drum and the second drain pipe of the washing machine. The inlet of the second three-way valve can be connected to the two outlets selectively or simultaneously.

[0020] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0021] By means of the above control method, the drainage water flow of any water drum of the double-drum washing machine can be discharged simultaneously from the water passages connecting the two water drums, thereby improving the drainage rate of the washing machine.

[0022] Through the above-mentioned method, the present invention enables any water drum of a dual-drum washing machine to have a fast drainage program, so that the drainage water flow flowing out of the drain outlet of the water drum can be divided into two parts, one part is directly discharged outside through the first drain pipe, and the other part flows through the second water drum and then discharged outside through the second drain pipe, so as to achieve the purpose of synchronously draining any water drum of the dual-drum washing machine through two different drainage waterways, thereby achieving a significant technical progress in shortening the drainage time of the washing machine and improving the drainage efficiency.

[0023] At the same time, the present invention has a simple structure, a concise method, and a significant effect, and is suitable for promotion and use.

[0024] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort. In the accompanying drawings:

[0026] Figure 1 2 is a schematic structural diagram of a double-drum washing machine according to an embodiment of the present invention;

[0027] Figure 2 This is a flowchart of a control method for a double-drum washing machine in Embodiment 1 of the present invention;

[0028] Figure 3 This is a flowchart of a control method for a double-drum washing machine in the second embodiment of the present invention.

[0029] Description of the main components in the figure:

[0030] 1. The first water container; 2. The second water container.

[0031] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0034] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0035] like Figures 1 to 3 As shown, an embodiment of the present invention introduces a dual-drum washing machine comprising a first washing unit and a second washing unit capable of independently performing laundry washing steps. The first and second washing units can independently perform a water intake cycle, a washing cycle, a draining cycle, a rinsing cycle, and a dehydration cycle on the laundry to achieve the purpose of washing the laundry. Preferably, the first and second washing units can also be equipped with drying devices to perform a drying cycle after the dehydration cycle to achieve the purpose of drying the laundry in the first and / or second washing units. Preferably, the first washing unit includes a first water drum 1 and a second water drum 2. The first water drum 1 includes a first washing drum that can rotate relative to each other and a first heater for heating the wash water therein; the second water drum 2 includes a second washing drum that can rotate relative to each other and a second heater for heating the wash water therein. Therefore, during the washing cycle, the wash water in the corresponding water drums is stirred and heated, achieving the effects of washing, dehydrating, and adjusting the water temperature of the laundry.

[0036] In this embodiment of the present invention, a three-way valve is installed at the drain outlet of the first water storage drum 1. The inlet of the three-way valve is connected to the drain outlet of the first water storage drum 1, and the two outlets of the three-way valve are connected to the water inlet of the second water storage drum 2 and the first drain pipe of the washing machine, respectively. The inlet of the three-way valve can be connected to either or both outlets, so that the water flowing out of the first water storage drum 1 can flow into the second water storage drum 2 or the first drain pipe, either alternatively or simultaneously. This achieves adjustable setting of the water flow direction of the water drained from the first water storage drum, so that the water drained from the first water storage drum can be reused in the second water storage drum, directly discharged, or quickly drained through the second water storage drum and the first drain pipe simultaneously.

[0037] At the same time, in the embodiment of the present invention, another three-way valve can be provided at the drain outlet of the second water drum 2, so that the drain outlet of the second water drum 2 is connected to the inlet of the second three-way valve, and the two outlets of the second three-way valve are respectively connected to the water inlet of the first water drum 1 and the second drain pipe of the washing machine, so that the inlet of the second three-way valve can be connected to the two outlets selectively or simultaneously, thereby achieving the effect of adjusting the flow direction of the drainage water from the second water drum (not indicated in the drawings).

[0038] In an embodiment of the present invention, a control method for the above-mentioned double-drum washing machine is introduced. Any water drum of the double-drum washing machine has a fast drainage program, so that the drainage water flow flowing out of the drain outlet of the water drum can be divided into two parts, one part is directly discharged outside through the first drain pipe, and the other part flows through the second water drum and then discharged outside through the second drain pipe. This achieves the purpose of synchronously draining any water drum of the double-drum washing machine through two different drainage waterways, thereby achieving a significant technical progress in shortening the drainage time of the washing machine and improving the drainage efficiency.

[0039] Example 1

[0040] This embodiment introduces a control method for a dual-drum washing machine, which includes two water drums. When a quick drain program is executed in the first water drum, part of the drainage water flow from the first water drum flows into the second water drum and is discharged from the drain outlet of the second water drum through the second drain pipe; the other part of the drainage water flow is directly discharged through the first drain pipe.

[0041] By means of the above control method, the drainage water flow of any water drum of the double-drum washing machine can be discharged from the water passages respectively connected to the two water drums, thereby improving the drainage rate of the washing machine.

[0042] In this embodiment, the first water storage drum has two draining procedures: a quick draining procedure and a normal draining procedure. During the quick draining procedure, the drain outlet of the first water storage drum is connected to both the first drain pipe and the water inlet of the second water storage drum, while the drain outlet of the second water storage drum is connected to the second drain pipe. During the normal draining procedure, the drain outlet of the first water storage drum is connected only to the first drain pipe.

[0043] In this embodiment, before the first water tank executes the rapid drain sequence and some of the water from the first water tank flows to the second water tank, a check is performed to determine whether the turbidity D1 of the water in the first water tank is greater than the turbidity D2 of the water in the second water tank. If so, the first water tank continues the rapid drain sequence; if not, the first water tank begins the normal drain sequence. This prevents the highly turbid wastewater in the first water tank from flowing into the second water tank during the drainage process, potentially contaminating the load in the second water tank.

[0044] In this embodiment, before the first water tank executes the quick drain sequence, it detects the time t1 required for the second water tank to reach the drain sequence start point. It then determines whether t1 is less than a set value t. If so, the first water tank pauses draining. After t1, it begins draining synchronously with the second water tank, with the drain outlet of the first water tank connected to the washing machine's first drain pipe and the water inlet of the second water tank, respectively, and the drain outlet of the second water tank connected to the second drain pipe. If not, the first water tank immediately begins draining normally, with the drain outlet of the first water tank connected only to the washing machine's first drain pipe. This allows for synchronized draining of the first and second water tanks.

[0045] In this embodiment, while the first water drum is executing a quick drain sequence, a determination is made as to whether the second water drum is currently executing a drain sequence. If so, the first water drum is controlled to continue executing the quick drain sequence to ensure that the water flowing into the second water drum can be discharged from the second water drum. If this determination is negative, the washing machine is controlled to continue executing other logical checks, such as turbidity comparisons and comparisons with the second water drum's drain sequence time points, to determine whether the first water drum of the washing machine should continue executing the quick drain sequence or the normal drain sequence.

[0046] In this embodiment, when the first water drum is performing the quick draining process, the second rotating drum in the second water drum is controlled to rotate, and the load in the second rotating drum is rinsed by the drain water flowing through it. Through the above arrangement, the second water drum can use the drain water of the first water drum to rinse the load in the drum.

[0047] like Figure 2 As shown, in this embodiment, the control method of the double-drum washing machine includes the following steps:

[0048] Step S1: Before the first water storage drum executes the drainage process, detect whether the second water storage drum is executing the drainage process. If so, execute step S3; if not, execute step S2;

[0049] Step S2: Detect the time t1 required for the second water container to reach the start point of the drainage process; determine whether t1 is greater than the set time t. If so, execute step S5; if not, execute step S3;

[0050] Step S3, detecting the turbidity D1 of the water in the first water storage drum and the turbidity D2 of the water in the second water storage drum, and determining whether D1 is greater than D2. If so, proceed to step S5; if not, proceed to step S4;

[0051] Step S4: The first water drum suspends the drainage process. After time t1, the first water drum and the second water drum simultaneously start the drainage process. The first drain port of the first water drum is connected to the water inlet of the second water drum and the first drain pipe of the washing machine respectively. Part of the drainage water from the first water drum flows into the second water drum. The drain port of the second water drum is connected to the second drain pipe of the washing machine. The drainage water flowing through the second water drum flows through the drain port of the second water drum to the second drain pipe of the washing machine. At the same time, the second washing drum in the second water drum is controlled to rotate at a low speed, and the load in the drum is rinsed by the drainage water flowing through the drum.

[0052] Step S5: The first water drum starts to execute the drainage procedure. The drain port of the first water drum is only connected to the first drain pipe of the washing machine, and all the drainage of the first water drum flows directly to the first drain pipe of the washing machine.

[0053] In this embodiment, while the first water storage tank is executing the draining process, a check is performed to determine whether the second water storage tank is currently operating. If not, the first water storage tank immediately begins the rapid draining process, connecting the first water storage tank's drain outlet to both the first drain pipe and the second water storage tank's water inlet, and the second water storage tank's drain outlet to the second drain pipe. Water from the first water storage tank is partially discharged directly through the first drain pipe, while water from the second water storage tank is partially discharged through the second drain pipe after flowing through the second drain pipe. Thus, when the second water storage tank is not operating, the first water storage tank is controlled to immediately execute the rapid draining process, draining the water from the first water storage tank as quickly as possible and minimizing the draining time of the first water storage tank.

[0054] Example 2

[0055] The difference between this embodiment and the above-mentioned embodiment 1 is that:

[0056] In this embodiment, before the first water drum executes the quick drainage program, the time t2 required for the first water drum to drain the water is measured, and the time t1 required for the second water drum to reach the starting node of the drainage program is detected; it is determined whether t1 is less than the set value t2; if so, the first water drum suspends the execution of the drainage program, and after the time t1, it starts the drainage program synchronously with the second water drum, the drain outlet of the first water drum is respectively connected to the first drain pipe of the washing machine and the water inlet of the second water drum, and the drain outlet of the second water drum is connected to the second drain pipe; if not, the first water drum starts to execute the normal drainage program, and the drain outlet of the first water drum is only connected to the first drain pipe of the washing machine.

[0057] like Figure 3 As shown, in this embodiment, the control method of the double-drum washing machine includes the following steps:

[0058] Step S1: Before the first water storage drum executes the drainage process, detect whether the second water storage drum is executing the drainage process. If so, execute step S3; if not, execute step S2;

[0059] Step S2: Detect the time t1 required for the second water storage drum to reach the start point of the drainage process; calculate the time t2 required for the drainage process of the first water storage drum; determine whether t1 is greater than the set time t2; if so, execute step S5; if not, execute step S3;

[0060] Step S3, detecting the turbidity D1 of the water in the first water storage drum and the turbidity D2 of the water in the second water storage drum, and determining whether D1 is greater than D2. If so, proceed to step S5; if not, proceed to step S4;

[0061] Step S4: The first water drum suspends the drainage process. After time t1, the first water drum and the second water drum simultaneously start the drainage process. The first drain port of the first water drum is connected to the water inlet of the second water drum and the first drain pipe of the washing machine respectively. Part of the drainage water from the first water drum flows into the second water drum. The drain port of the second water drum is connected to the second drain pipe of the washing machine. The drainage water flowing through the second water drum flows through the drain port of the second water drum to the second drain pipe of the washing machine. At the same time, the second washing drum in the second water drum is controlled to rotate at a low speed, and the load in the drum is rinsed by the drainage water flowing through the drum.

[0062] Step S5: The first water drum starts to perform a normal drainage procedure. The drain port of the first water drum is only connected to the first drain pipe of the washing machine, and all the drainage of the first water drum flows directly to the first drain pipe of the washing machine.

[0063] Example 3

[0064] like Figure 1 As shown, this embodiment introduces a double-drum washing machine using the above-mentioned control method, which includes a first water drum 1 and a second water drum 2; the drain outlet of the first water drum 1 is connected to the inlet of a three-way valve, and the two outlets of the three-way valve are respectively connected to the water inlet of the second water drum 2 and the first drain pipe of the washing machine, and the inlet of the three-way valve can be connected to either one or both outlets; the drain outlet of the second water drum 2 is connected to the second drain pipe of the washing machine.

[0065] In this embodiment, in order to implement the above-mentioned control method, turbidity sensors for detecting the turbidity of the water in the cylinder are respectively provided on the first water cylinder 1 and the second water cylinder 2, so as to achieve the purpose of detecting the turbidity of the water in the first water cylinder and the second water cylinder respectively, and then achieve the corresponding call and judgment of the detection value in the control method.

[0066] In this embodiment, the first water container 1 and the second water container 2 can be arranged arbitrarily, for example, up and down, left and right, etc. Figure 1 As shown, the first water cylinder 1 and the second water cylinder 2 are arranged up and down, and the three-way valve is arranged between the first water cylinder 1 and the second water cylinder 2.

[0067] Example 4

[0068] The control method described above in the embodiments of the present invention is described using the example of draining the first water drum 1. However, the control method is also applicable to draining the second water drum 2, utilizing the first water drum 1 to simultaneously drain water, while partially discharging the water from the second water drum 2 through the first drain pipe connected to the first water drum outlet, thereby achieving rapid drainage of the second water drum 2. This description will not be repeated here.

[0069] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments using the above technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A control method for a double-drum washing machine, the double-drum washing machine comprising two water drums; characterized in that: When the first water tank performs a quick drainage procedure, part of the drainage water from the first water tank flows into the second water tank and is discharged from the drainage port of the second water tank; When the first water cylinder performs the quick drainage procedure, the drain outlet of the first water cylinder is connected to the first drain pipe and the water inlet of the second water cylinder at the same time, and the drain outlet of the second water cylinder is connected to the second drain pipe; when the first water cylinder performs the normal drainage procedure, the drain outlet of the first water cylinder is only connected to the first drain pipe.

2. A double drum washing machine control method according to claim 1, characterized in that: Before part of the water in the first water tank flows to the second water tank, it is determined whether the turbidity D1 of the water in the first water tank is greater than the turbidity D2 of the water in the second water tank; if so, the first water tank continues to perform the fast drainage procedure; if not, the first water tank starts to perform the normal drainage procedure.

3. A double drum washing machine control method according to claim 1, characterized in that: Before the first water drum executes the quick drainage program, it detects the time t1 required for the second water drum to reach the starting node of the drainage program; determines whether t1 is less than the set value t. If so, the first water drum suspends the drainage program, and after time t1, it starts the drainage program synchronously with the second water drum, and the drain outlet of the first water drum is connected to the first drain pipe of the washing machine and the water inlet of the second water drum respectively, and the drain outlet of the second water drum is connected to the second drain pipe; if not, the first water drum directly starts the normal drainage program, and the drain outlet of the first water drum is only connected to the first drain pipe of the washing machine.

4. A double drum washing machine control method according to claim 1, characterized in that: Before the first water drum executes the quick drainage program, the time t2 required for the drainage program of the first water drum is measured, and the time t1 required for the second water drum to reach the starting node of the drainage program is detected; it is determined whether t1 is less than the set value t2; if so, the first water drum suspends the execution of the drainage program, and after the time t1, it starts the drainage program synchronously with the second water drum, and the drain outlet of the first water drum is respectively connected to the first drain pipe of the washing machine and the water inlet of the second water drum, and the drain outlet of the second water drum is connected to the second drain pipe; if not, the first water drum starts to execute the normal drainage program, and the drain outlet of the first water drum is only connected to the first drain pipe of the washing machine.

5. A double drum washing machine control method according to any one of claims 1 to 4, characterized in that: When the first water holding drum executes the quick drainage program, the second rotating drum in the second water holding drum is controlled to rotate, and the load in the second rotating drum is rinsed by the drainage water flowing through the first water holding drum.

6. A double drum washing machine control method according to any one of claims 1 to 4, characterized in that: When the first water cylinder is executing the drainage program, it is determined whether the second water cylinder is working; if not, the first water cylinder directly starts to execute the quick drainage program, and controls the drain outlet of the first water cylinder to be connected to the first drain pipe and the water inlet of the second water cylinder at the same time, and the drain outlet of the second water cylinder to be connected to the second drain pipe. Part of the drainage of the first water cylinder is directly discharged through the first drain pipe, and part of it flows through the second water cylinder and then is discharged through the second drain pipe.

7. A double-drum washing machine using the control method according to any one of claims 1 to 6, characterized in that: It includes a first water tank and a second water tank; the drain outlet of the first water tank is connected to the inlet of the three-way valve, the two outlets of the three-way valve are respectively connected to the water inlet of the second water tank and the first drain pipe of the washing machine, and the inlet of the three-way valve can be connected to one of the two outlets or simultaneously; the drain outlet of the second water tank is connected to the second drain pipe of the washing machine.

8. A double drum washing machine according to claim 7, characterized in that: The first water storage cylinder and the second water storage cylinder are respectively provided with turbidity sensors for detecting the turbidity of water in the cylinders.

9. A double-drum washing machine according to claim 7 or 8, characterized in that: The drain outlet of the second water storage drum is connected to the inlet of the second three-way valve. The two outlets of the second three-way valve are respectively connected to the water inlet of the first water storage drum and the second drain pipe of the washing machine. The inlet of the second three-way valve can be connected to one of the two outlets or simultaneously.

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