WO2021032042A1

WO2021032042A1 - Washing machine and control method therefor

Info

Publication number: WO2021032042A1
Application number: PCT/CN2020/109447
Authority: WO
Inventors: 杨丽梅; 刘尊安; 赵成龙
Original assignee: 青岛海尔洗衣机有限公司; 海尔智家股份有限公司
Priority date: 2019-08-20
Filing date: 2020-08-17
Publication date: 2021-02-25
Also published as: CN112411120A

Abstract

A washing machine, comprising a washing drum (2), the washing drum independently holding washing water during washing; comprising a water detection channel, the water detection channel being in communication with the washing drum; and further comprising a turbidity detection device (10), the turbidity detection device detecting turbidity of water in the water detection channel. The control method for the washing machine comprises: in a laundry treatment process, determining, according to a detection result of a turbidity detection device, whether to end a washing program and/or a rinsing program. The washing machine and the control method therefor can implement the function of stopping the washing machine when the clothes are clean for a washing machine having no water between drums or a washing machine without an outer drum, improving the cleaning efficiency of said washing machines, and saving water resources.

Description

Washing machine and control method

Technical field

The invention belongs to the field of laundry treatment equipment, and specifically relates to a washing machine and a control method.

Background technique

Existing pulsator washing machines generally use the washing time and rinsing times of the washing program preset by the washing machine manufacturer. The pulsator (or the pulsator and the inner tub) is driven by a motor to perform frequent positive and negative rotations to drive the water flow and wash the clothes. However, since this washing method cannot determine whether the clothes are washed and rinsed well, the clothes may be worn or not cleaned or rinsed.

Nowadays, washing machines with a wash and stop function have appeared on the market, which can realize the perception of washing and rinsing. For example, the Chinese patent: CN101250802B proposes a fully automatic washing machine with a wash and stop function, an outer tub containing washing water, an inner tub coaxially arranged on the outer tub and rotatable around a central axis, a computer board that controls and stores various washing programs, and The control panel is provided with a turbidity sensor at the bottom of the outer barrel, and the turbidity sensor is electrically connected to the computer board. The washing machine can correctly judge whether the stains in the clothes are washed out and whether they are rinsed clean. After the rinsing is clean, stop in time to achieve the effect of saving water and electricity, without artificially setting the number of rinsing. However, the above-mentioned washing machine with a wash and stop function installs the turbidity on the outer tub, and this function cannot be realized for a washing machine with no water/outer tub in the tub. Therefore, there is a need to provide a washing machine that can realize the instant stop function of the washing machine without water/outer tub.

In view of this, the present invention is proposed.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a washing machine and a control method that can realize the instant stop function of the washing machine without water/outer tub.

In order to solve the above technical problems, the first object of the present invention is to provide a washing machine, including a detection water channel, the detection water channel is connected to the washing tub, and also includes a turbidity detection device, the turbidity detection device The turbidity of the water in the water channel is detected.

Further, it also includes a water collection device with a water collection cavity inside, at least the bottom of the washing tub is arranged in the water collection device, and the detection water channel includes a water collection device arranged on the water collection device and connected to the washing The bottom of the barrel can rotate and seal the communicating chamber, and the turbidity detection device is arranged in the communicating chamber.

Further, it also includes a water collection device with a water collection cavity inside, at least the bottom of the washing tub is arranged in the water collection device, and the detection water channel includes a water collection device arranged on the water collection device and connected to the washing The bottom of the barrel can be rotatably sealed and communicated with a communicating chamber and a communicating pipeline communicating with the communicating chamber, and the turbidity detecting device is arranged on the communicating pipeline.

Further, a communication port is provided at the bottom of the washing tub, a water inlet is provided at a position corresponding to the communication port in the communication chamber, and the water inlet and the communication port are rotatably and sealedly connected;

Preferably, the middle of the bottom of the washing tub is assembled on the dehydration shaft of the washing machine, the water inlet is arranged in a ring structure surrounding the dehydration shaft, the bottom of the inner tub is protrudingly provided with a convex ring structure, the The convex ring structure is rotatably and sealedly fitted with the annular structure, and the communication port is arranged in the convex ring structure.

Further, it further includes a circulating water pump and a circulating pipeline, the communication pipeline is in communication with the water inlet of the circulating water pump, the outlet of the circulating water pump is in communication with the circulation pipeline, and the circulation pipeline is in communication with the washing machine. barrel.

Further, it also includes a drainage pipeline, the drainage pipeline is in communication with the water outlet or the circulation pipeline of the circulating water pump; a drainage solenoid valve is arranged on the drainage pipeline, and a circulating solenoid is arranged on the circulation pipeline. valve.

Further, it also includes a water collection device with a water collection cavity inside, at least the bottom of the washing tub is arranged in the water collection device, and the detection water channel includes a water collection device arranged on the water collection device and connected to the washing The bottom of the barrel can rotate and seal the communicating chamber, the bottom wall of the water collecting device is provided with a water outlet, the outlet is covered by the communicating chamber, and the outlet is also provided with a drain valve, so The turbidity detection device is arranged inside the communication chamber or on the drain valve.

The second object of the present invention is to provide the above-mentioned control method for the washing machine. During the laundry treatment process, it is determined whether to end the washing program and/or the rinsing program according to the detection result of the turbidity detection device.

Further, during the laundry washing process, the circulating water pump is controlled to start, and the turbidity detection device obtains the turbidity value of the water in the detected water channel. If the difference between the currently detected turbidity value and the last detected turbidity value is less than or equal to the first When the difference is preset, the washing program ends.

Further, the circulating water pump is controlled to start during the laundry rinsing process, and the turbidity detection device obtains and detects the turbidity value of the water in the water channel. If the difference between the turbidity value of the current rinse water and the initial turbidity value is less than or equal to the second preset value When the rinsing program ends.

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

1. The washing machine of the present invention can realize the instant stop function of the washing machine without water/outer tub in the tub, improve the cleaning efficiency of the waterless/outer tub washing machine in the tub, and save water resources.

2. The washing machine of the present invention is provided with a circulating water pump to re-pump the water flowing from the washing tub into the detection water channel back into the washing tub, which improves the use efficiency of washing water and saves water resources.

3. The washing machine of the present invention can detect the turbidity of the water in the detection water channel and realize the water circulation in the washing tub when the washing tub is in a stationary or rotating state.

4. The washing machine of the present invention can simultaneously realize the internal circulation and instant stop of washing of the washing machine without water/outer tub, and further improve the washing rate of clothes.

The specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

Description of the drawings

The accompanying drawings are used as a part of the present invention to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings in the following description are only some embodiments, and for those of ordinary skill in the art, other drawings can be obtained from these drawings without creative work. In the attached picture:

Figures 1 and 2 are schematic diagrams of the second embodiment of the present invention

FIG. 3 is a schematic diagram of the structure of Embodiment 3 in Embodiment 1 of the present invention;

Figure 4 is a control logic diagram of Embodiment 2 of the present invention;

Among them, 1. Water collecting device; 11. Water outlet; 12. Connecting chamber; 13. Cover; 2. Washing bucket; 21. Connecting port; 22. Convex ring structure; 3. Wave wheel; 4. Circulating water pump; 41. Connecting pipeline; 42, Circulating pipeline; 43. Drainage pipeline; 5. Washing shaft; 121. Ring structure; 6. Reducer; 7. Motor; 8. Sealing structure; 9. Dewatering shaft; 10. Turbidity Degree detection device.

It should be noted that these drawings and text descriptions are not intended to limit the scope of the invention in any way, but to explain the concept of the invention for those skilled in the art by referring to specific embodiments.

detailed description

In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention. , But not used to limit the scope of the present invention.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "inner" and "outer" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the pointed device or element must have a specific orientation, be configured and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

In the description of the present invention, it should be noted that the terms "installed", "connected", "connected", "contacted" and "connected" should be understood in a broad sense, unless explicitly specified and limited otherwise. For example, they may be The fixed connection can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present invention can be understood in specific situations.

Example 1

A washing machine includes a detection water channel that is connected to the washing tub 2 and also includes a turbidity detection device 10 that detects the turbidity of the water in the detection water channel.

Specifically, a washing machine as shown in Figs. 1-3 includes a washing tub 2. The washing tub 2 is configured as a bucket with a side wall and a bottom without holes. When washing, the washing tub 2 independently contains washing water. The washing machine in the embodiment can be configured as a washing machine without an outer tub or a washing machine without washing water between the tubs. This structure can greatly reduce the amount of washing water and save water resources. A number of dehydration holes are provided on the upper part of the washing tub 2 for throwing water out of the washing tub 2 during the dehydration process. The setting height of the dehydration hole must ensure that the washing water will not be discharged from the dehydration hole during washing/rinsing, and during dehydration, the water on the clothes will be thrown out through the dehydration hole under the action of centrifugal force. The dehydration hole can be set in the washing tub The bucket bi of 2 is higher than the position of the highest washing water level and is distributed along the circumference of the washing bucket 2. The washing machine of this embodiment further includes a speed reducer 6 on which the washing shaft 5 and the dehydrating shaft 9 are installed, and also includes a motor 7 installed on the speed reducer 6 for driving the washing shaft 5 or the dehydrating shaft 9. The washing machine of this embodiment also includes a detection water channel which is connected to the washing tub 2. During the washing/rinsing process, the water in the washing tub 2 enters the detection water channel. The washing machine of this embodiment also includes turbidity. The detection device 10, the turbidity detection device 10 is preferably a turbidity sensor, the turbidity sensor is composed of a light emitter and a photoelectric converter, the turbidity sensor is a known technology in the present No further explanation will be given in the embodiments. The turbidity detection device 10 detects the turbidity of the water in the detection water channel, so as to realize the wash-and-stop function of the washing machine without water/outer tub in the tub, and improve the performance of the washing machine without water/outer tub in the tub. Clean efficiency and save water.

The following specific embodiments describe in detail the location of the turbidity detection device 10:

Specific embodiment 1: The washing machine in this embodiment includes a water collection device 1 with a water collection cavity inside, at least the bottom of the washing tub 2 is arranged in the water collection device 1, and the detection water channel includes A communication chamber 12 on the water collection device 1 and rotatably and sealedly communicated with the bottom of the washing tub 2, and the turbidity detection device 10 is disposed in the communication chamber 12.

Specifically, as shown in Figures 1-3, the water collection device 1 can be set as an outer tub. Since the washing tub 2 only has a dehydration hole at a position higher than the highest water level, the outer tub and the washing There is no water flow between the tub 2, which can effectively avoid the accumulation of dirt between the washing tub 2 and the outer tub, and reduce the probability of secondary pollution of the clothes; and during the dehydration process, the water in the washing tub 2 is removed from the top of the washing tub 2. The dehydration hole is thrown out to enter between the washing tub 2 and the outer tub, and finally the washing machine is discharged from the drain at the bottom of the outer tub. Alternatively, the water collecting device 1 is set as a water collecting tray installed at the bottom of the washing tub 2, which can at least cover the bottom of the washing tub 2. This structure is beneficial to enlarge the volume of the washing tub 2. The water channel that collects the washing water, the water channel is matched with the dehydration hole, and is used to collect the water stream thrown from the dehydration hole during the dehydration process, and guide the water stream into the water collecting tray, and then discharge the washing machine from the drain port of the water collecting tray. The communication chamber 12 is arranged on the inner surface of the bottom wall of the water collecting device 1, and is rotatably and sealedly communicated with the bottom of the washing tub 2, so as to ensure that the washing tub 2 can ensure the communication chamber regardless of whether it is stationary or rotating. 12 and the washing tub 2, the turbidity detection device 10 is arranged inside the communication chamber 12 to detect the turbidity of the water in the communication chamber.

Further, the communication chamber 12 includes a cover 13 with an opening, and the cover 13 is installed on the inner surface of the bottom wall of the water collecting device 1 and forms between the inner surface of the bottom wall of the water collecting device 1. The communication chamber 12 is isolated from the water collection device 1, the inlet of the communication chamber 12 is in communication with the communication port 21, and the turbidity detection device 10 is disposed in the communication chamber 12 The inside is used to detect the turbidity of the water in the communication chamber 12.

Specifically, the communication chamber 12 is a box-shaped structure formed by a cover 13 with an opening, and the cover 13 is inverted on the inner surface of the bottom wall of the water collecting device 1 to form the communication chamber 12, The communication chamber 12 is independently sealed with respect to the water collection device 1. The water in the washing tub 2 first enters the communication chamber 12 through the communication port 21 and the water inlet. The communication chamber 12 can buffer the water flow and effectively prevent the water flow entering the communication chamber 12 from overflowing. Provide sufficient water source for turbidity detection to ensure the accuracy of turbidity detection. The communicating chamber 12 is arranged on the water collecting device 1 and has a communicating chamber 12 independent of the water collecting device 1 on the inner surface of the water collecting device 1. On the one hand, it can prevent the rotation of the washing tub 2 from affecting the connection strength of the communicating chamber 12 In particular, large centrifugal force will be generated when there is water flow in the communicating chamber 12, on the other hand, there is no need to store water in the water collecting device 1, which greatly reduces the water consumption, which is beneficial to saving water and protecting the environment. At the same time, the water-free setting of the water collecting device 1 can prevent dirt from accumulating in the water collecting device 1 and avoid the trouble caused by dirt cleaning.

Further, the bottom of the washing tub 2 is provided with a communication port 21, the communication chamber 12 is provided with a water inlet at a position corresponding to the communication port 21, and the water inlet and the communication port 21 are rotatably sealed connection;

Preferably, the middle of the bottom of the washing tub 2 is assembled on the dehydration shaft 9 of the washing machine, the water inlet is arranged as an annular structure 121 surrounding the dehydration shaft 9, and the bottom of the washing tub 2 is protrudingly provided with A convex ring structure 22, the convex ring structure 22 and the annular structure 121 are rotatably and sealedly fitted, and the communication port 21 is provided in the convex ring structure 22.

Specifically, as shown in Figures 1-3, the communication port 21 can be arranged as one or several water flow channels around the dehydration shaft 9, and the edge of the communication port 21 is provided with a connecting rib fixedly connected to the dehydration shaft 9, and the connecting rib is used for washing. The connection of the barrel 2 and the dehydration shaft 9. The water in the washing tub 2 flows through the communication port 21 and the water inlet at the bottom of the washing tub 2 into the communication chamber 12. Arranging the communication port 21 at the bottom of the washing tub 2 facilitates the use of the gravity of the water flow to guide the water out of the washing tub 2 and improves the efficiency of the water flow entering the communicating chamber. The water inlet sealingly surrounds the communication port 21 to receive all the water flow flowing in from the communication port 21. The water inlet is arranged as an annular structure 121 surrounding the dehydration shaft 9, a convex ring structure 22 is protrudingly provided at the bottom of the washing tub 2, and the convex ring structure 22 is rotatably and sealedly fitted with the annular structure 121, so The communication port 21 is arranged in the convex ring structure 22. The water inlet is arranged as a ring structure 121, which is in nested and sealed fit with the convex ring structure 22 at the bottom of the washing tub 2. The fit is reliable in connection, tightly sealed, and easy to install. In this way, a rotatable and sealed connection between the communication chamber 12 and the washing tub 2 is realized, and the water in the washing tub 2 can enter the communication chamber 12 regardless of whether the washing tub 2 is in a stationary or rotating state. The convex ring structure 22 and/or the annular structure 121 is provided with a sealing structure 8 along the circumferential direction. The sealing structure 8 is arranged at the connecting surface of the convex ring structure 22 and the annular structure 121 and is arranged along the circumferential direction of the connecting surface. 8 can be a sealing rib or a sealing ring or other forms of sealing structure 8.

Embodiment 2: The washing machine in this embodiment includes a water collection device 1 with a water collection cavity inside, at least the bottom of the washing tub 2 is arranged in the water collection device 1, and the detection water channel includes The communication chamber 12 on the water collection device 1 and rotatably and sealedly communicated with the bottom of the washing tub 2 and the communication pipeline 41 communicated with the communication chamber, the turbidity detection device 10 is installed in the The communicating pipeline 41 is on.

Specifically, the arrangement form of the communication chamber 12 in this embodiment is the same as that in the first embodiment, and will not be repeated here. The difference is that a water outlet 11 is provided on the bottom wall of the water collection device 1, and the water outlet 11 is covered by the communicating chamber 12, and the communicating pipeline 41 is connected to the communicating chamber through the water outlet 11 12 is connected. The water outlet 11 is arranged on the bottom wall of the water collection device 1 and is located inside the communication chamber 12, and the water outlet 11 is arranged on the bottom wall of the water collection device 1 to facilitate the communication chamber 12 The water enters the pipeline. The water outlet 11 is connected to the communication pipeline 41, and the turbidity detection device 10 is arranged on the communication pipeline 41 to detect the turbidity of the water entering the communication pipeline 41 from the communication chamber 12. Considering the limited accommodating space of the communication chamber 12, the turbidity detection device 10 is installed on the communication pipeline 41, and the water in the communication chamber 12 is drawn out before turbidity detection is performed so that the turbidity detection device 10 is set It is more flexible and convenient to maintain the turbidity detection device 10. The water flowing out of the communication pipe 41 can be directly discharged or reused in other forms.

Further, it also includes a circulating water pump 4, the circulating water pump 4 is arranged on the communication pipe 41 and communicated with the communication chamber 12, and the turbidity detection device 10 is arranged at the inlet of the circulating water pump 4. Water end/outlet end. The circulating water pump 4 is provided on the connecting pipe 41 to quickly pump water from the washing tub 2 to improve the efficiency of turbidity detection. At the same time, the pumped water can be directly discharged or pumped back into the washing tub 2 again. If it is discharged directly, the circulating water pump 4 is provided to drain the water in the washing tub 2 and the communicating chamber 12 to avoid the accumulation of residual water, the generation of dirt, and the secondary pollution of clothes. If the pumped water is pumped back to the washing tub 2 again, the washing rate of clothes can be improved and water can be saved.

Further, when pumping the pumped water back into the washing tub 2 again, the washing machine includes a circulating water pump 4 and a circulating pipe 42 that communicates with the water inlet of the circulating water pump 4, and The water outlet of the circulating water pump 4 is connected to the circulating pipe 42, and the circulating pipe 42 is connected to the washing tub 2.

Specifically, the washing water in the washing tub 2 first enters the communication chamber 12 through the communication port 21 and the water inlet, and then flows back into the washing tub 2 through the communication pipeline 41 and the circulation pipeline 42 under the action of the circulating water pump 4. The communication chamber 12 can buffer the water flow and effectively prevent the water flow from overflowing. At the same time, the accumulation of the water flow in the communication chamber 12 is conducive to the formation of a circulating water flow with a large flow rate and velocity, and generates power for washing clothes. Improve the washing effect of clothes, and also improve the utilization rate of washing water. At the same time, the turbidity detection device 10 is set on the communication pipeline 41/circulation pipeline 42, and the turbidity detection can be completed when water enters the communication pipeline 41/circulation pipeline 42 from the communication chamber 12. The washing machine also realizes the internal circulation and instant stop of washing of the washing machine with no water/outer tub between the tubs, which further improves the washing rate of clothes and saves water.

Further, the circulation pipeline 42 is connected to the barrel opening of the washing tub 2, and a spray device is installed at the end of the circulation pipeline 42. The installation of the spray device can increase the spray surface of the circulating washing water and improve the washing efficiency. The circulation pipe 42 is arranged to inject water from the mouth of the washing tub 2 to form a stronger water flow, which can increase the impact of the circulating water flow on the clothes, which is beneficial to the washing of the clothes and improves the washing efficiency. The washing machine of the present invention is provided with a spray structure at the outlet end of the circulation pipe 42 to effectively improve the laundry washing effect.

Further, the washing machine further includes a drain pipe 43 connected to the outlet of the circulating water pump 4 or the circulating pipe 42; a drain solenoid valve is installed on the drain pipe 43, and the circulating water A circulating solenoid valve is installed on the pipeline 42. The drainage pipe 43 can also be connected to the communication pipe 41, and this solution can use the gravity of the washing water to drain. When the drainage pipe 43 is connected to the circulating water pump 4 or the circulating pipe 42, the circulating water pump 4 can be controlled to be turned on to provide power for drainage and accelerate the drainage process.

Specifically, as shown in FIG. 2, a three-way joint is provided on the communication pipeline 41 or the circulation pipeline 42, and the drainage pipeline 43 is connected to the communication pipeline 41 or the circulation pipeline 42 through the three-way joint. The arrangement of the drainage pipe 43 can drain the washing residual water in the communicating chamber 12, and maintain the anhydrous state of the communicating chamber 12 after the washing machine is finished, so as to prevent the washing water from accumulating in the communicating chamber 12 for a long time to generate dirt. This causes secondary pollution to the clothes.

Further, a pulsator 3 is provided inside the washing tub 2, and the pulsator 3 is installed on the washing shaft 5. When clothes are washed, the pulsator 3 is controlled to rotate to generate a horizontal circumferential water flow in the washing tub 2, and at the same time, the water flowing out of the spray device of the circulation pipe 42 is sprayed into the washing tub 2, in the washing tub 2 A vertical impact water flow is formed, and the two water flows together form a spatial three-dimensional water flow, which can increase the friction between the washing water and the clothes and effectively improve the washing effect of the clothes.

Specific embodiment three, the washing machine in this embodiment includes a water collection device 1 with a water collection cavity inside, at least the bottom of the washing tub 2 is arranged in the water collection device 1, and the detection water channel includes The connecting chamber 12 on the water collecting device 1 and rotatably and sealingly communicated with the bottom of the washing tub 2 is provided with a water outlet 11 on the bottom wall of the water collecting device 1, and the water outlet 11 is connected by the The chamber 12 is covered, the water outlet 11 is also provided with a drain valve, and the turbidity detection device is arranged inside the communication chamber 12 or on the drain valve.

Specifically, as shown in FIG. 3, the structure of the communication chamber 12 in this embodiment is the same as that in the first embodiment, and will not be repeated here. The difference is that the bottom wall of the water collection device 1 of the washing machine in this embodiment is provided with a water outlet 11, the water outlet 11 is covered by the communication chamber 12, and the water outlet 11 is provided in the water collection device 1. Is located on the bottom wall of the communicating chamber 12, a drain valve is arranged on the water outlet 11, and the turbidity detection device 10 is arranged in the communicating chamber 12 or on the drain valve. During the laundry washing or rinsing process, the water in the washing tub 2 enters the communicating chamber 12, and the turbidity detecting device 10 detects the turbidity of the water in the communicating chamber 12. However, in the laundry washing process, the drain valve needs to be controlled to open the outlet of the water channel when the turbidity detection is performed, and the water flow in the communication chamber 12 flows out of the water outlet 11 to ensure that the communication chamber is every time the turbidity detection is performed. The turbidity value of the water in the chamber 12 is the same as the turbidity value of the washing tub 2. If it is determined according to the turbidity value that the clothes are not clean and need to be washed, the drain valve is controlled to block the outlet of the water channel, and the washing tub 2 continues to wash.

Example 2

This embodiment is a washing machine control method proposed on the basis of the washing machine of embodiment 1. The washing machine is shown in Figures 1-3, including: during the laundry treatment process, it is determined according to the detection result of the turbidity detection device 10 Whether to end the washing program and/or rinsing program.

When the water in the communication chamber 12 is returned to the washing tub 2 under the action of the circulating water pump 4, as shown in the washing machine shown in FIG. 1-2, during the execution of the laundry washing program, the control method includes: controlling the circulation during the laundry washing process The water pump 4 is started, and the turbidity-detection device obtains the turbidity value of the water in the detected waterway. If the difference between the currently detected turbidity value and the last detected turbidity value is less than or equal to the first preset difference value, it ends Washing program.

Specifically, as shown in the control logic diagram shown in Fig. 4, after the user puts the clothes into the washing tub 2, press the button to start the washing machine, the washing machine water inlet valve opens to pour clean water into the washing tub 2, and part of the clean water enters the communicating chamber 12 under the action of gravity. Then, the circulating water pump 4 is controlled to start, the water in the communication chamber 12 enters the pipeline, and the turbidity detection device 10 detects the turbidity of the clear water to obtain the initial turbidity value A0. The initial turbidity value can be obtained when the water is injected to a low water level, or after the water injection is completed. Then the washing machine washes the clothes according to the set program. When the turbidity value A1 of the washing water is obtained t minutes before the end of the washing time, or the turbidity value A1 of the washing water is obtained after the washing program runs for t minutes, the user can set the value of t by himself or record it on the control panel at the factory Medium users cannot be changed. For example, the turbidity value A1 of the washing water is obtained 6 minutes before the end of the washing, or the turbidity value A1 of the washing water is obtained after the washing program runs for 15 minutes. Obtain the turbidity value A2 of the washing water again after the interval unit time, for example, set the unit time to 2 min. When the difference between A2 and A1 is less than or equal to the first preset value, it is determined that the laundry has been cleaned, and the washing program ends. If the difference between A2 and A1 is greater than the first preset value, it means that the clothes have not been cleaned yet, continue washing, and obtain the turbidity value of the washing water again after an interval of unit time, until the difference between the turbidity values obtained twice in succession When it is less than the first preset value, the washing program ends.

During the washing process, the circulating water pump 4 can be controlled to be continuously turned on, or the circulating water pump 4 can be turned on only when the turbidity needs to be detected. When the circulating water pump 4 is continuously turned on, the turbidity detection device 10 can be set to detect the turbidity value of the washing water in real time, without waiting t minutes before the end of the washing time or t minutes after the washing program runs. The turbidity value of the second detection has a certain difference, and it is preferable that the time interval for obtaining the turbidity value twice is greater than or equal to 30S.

During the execution of the laundry rinsing program, the control method includes: controlling the circulating water pump 4 to start, and the turbidity detection device 10 obtains the turbidity value of the water in the detected water channel. If the difference between the turbidity value of the current rinse water and the initial turbidity value is less than or When it is equal to the second preset value, the rinsing program ends.

Specifically, as shown in the control logic diagram shown in Figure 4, when the laundry is finished washing, the washing water is drained from the washing tub 2 and then fresh water is poured into the washing tub 2. After the water injection is completed, the rinsing program is entered. After the rinsing is completed, the control The circulating water pump 4 is started to obtain the turbidity value A3 of the rinse water. When the difference between A3 and A0 is less than or equal to the second preset value, the clothes are rinsed clean and the rinsing program ends. If A3-A0 is greater than the second preset value , It means that the clothes have not been rinsed, then drain the rinse water and refill the clothes and rinse the clothes again until the difference between the current turbidity value of the rinse water and the initial turbidity value is less than or equal to the second preset value, end Rinse program.

During the rinsing process, the circulating water pump 4 can be controlled to start continuously or only when the turbidity needs to be detected. The initial turbidity value V0 can be obtained during the water injection process of the washing program, or during the water injection process of the rinsing program.

Further, when the drainage pipe 43 is provided on the circulation system, as shown in the washing machine shown in FIG. 2, the control method includes: controlling to open the circulating solenoid valve and the circulating water pump 4, and the water in the washing tub 2 flows in and communicates through the communication chamber 12. The pipeline 41 and the circulation pipeline 42 are then returned to the washing tub 2 through the outlet end of the circulation pipeline 42.

Specifically, when the water circulation process is performed, the drain solenoid valve is kept closed, and the washing machine controls to open the circulating solenoid valve and the circulating water pump 4. Under the driving force of the circulating water pump 4 and its own gravity, the water in the washing tub 2 runs along the bottom of the washing tub 2 The communicating port 21 flows into the communicating chamber 12, and the communicating chamber 12 has a buffering effect on water. The water in the communicating chamber 12 flows through the outlet of the waterway into the communicating pipeline 41, and from the washing tub 2 through the circulating water pump 4 and the circulating pipeline 42 The mouth of the barrel circulates back to the washing tub 2 to spray and wash the clothes. The flow rate of the water can be changed by adjusting the diameter of the connecting pipe 41 and the circulating pipe 42. The circulating water flow forms a vertical direction in the washing tub 2 Impact the water flow, thereby improving the spray washing effect of the water on the clothes and improving the washing efficiency.

When performing the draining process, keep the circulating solenoid valve closed, and the washing machine controls to open the drain solenoid valve. If the drain pipe 43 is connected to the circulating pipe 42 or the circulating water pump 4, the circulating water pump 4 is turned on at the same time. The residual water accumulated in the communication chamber 12 enters the communication pipe 41 through the connection port, and then flows through the circulating water pump 4 to be discharged from the drain pipe 43. This process can drain the residual water accumulated in the communication chamber 12 out of the washing machine, which is beneficial to keep the communication chamber 12 clean, avoiding the accumulation of residual water for a long time to generate dirt and causing secondary pollution to the clothes during washing.

When the water in the communication chamber 12 is directly drained, as shown in the washing machine shown in FIG. 3, during the laundry washing process, the drain valve is controlled to open, and the turbidity detection device 10 obtains the turbidity value of the water in the communication chamber 12. When the difference between the currently detected turbidity value and the last detected turbidity value is less than or equal to the first preset difference, keep the drain valve open and end the washing process. When the detected turbidity value is compared with the last detected turbidity value When the difference of the degree value is greater than the first preset difference value, the drain valve is controlled to close, and the washing process is continued. After an interval of unit time, the drain valve is controlled to open again, and the turbidity detection device detects turbidity until the current detected turbidity When the difference between the turbidity value and the turbidity value detected last time is less than or equal to the first preset difference value, the washing program ends.

Specifically, in the initial state, the drain valve at the outlet of the water channel is in the state of opening the outlet of the water channel. After the user puts the clothes into the washing tub 2, press the button to start the washing machine, and the washing machine's water inlet valve opens to pour clean water into the washing tub 2. Under the action, it enters the communication chamber 12 and flows out from the outlet of the water channel. At this time, the turbidity detection device 10 obtains the turbidity value of the clear water, that is, the initial turbidity value V0. The initial turbidity value can be obtained when the water is injected to a low water level or after the water injection is completed. After the initial turbidity value V0 is obtained, the drain valve is controlled to block the outlet of the waterway. After the water filling is completed, the washing machine washes the clothes according to the set program. Control the drain valve to open when t minutes before the end of the preset washing time, or control the drain valve to open after the washing program runs for t minutes to obtain the turbidity value A1 of the washing water. The user can set the value of t by himself, or The factory setting is set in the control panel and cannot be changed by the user. After the turbidity test is completed, the drain valve is controlled to block the water outlet. For example, the turbidity value A1 of the washing water is obtained 6 minutes before the end of washing, or the turbidity value A1 of the washing water is obtained by controlling the drain valve to open after the washing program runs for 15 minutes. After the interval unit time, the drain valve is controlled to open again to obtain the turbidity value A2 of the washing water, for example, the unit time is set to 2 min. When the difference between A2 and A1 is less than or equal to the first preset value, it is judged that the laundry has been cleaned and the washing program ends. At this time, the drain valve is kept open, and the water in the washing tub 2 is completely drained from the outlet of the water channel. If the difference between A2 and A1 is greater than the first preset value, it means that the clothes have not been cleaned yet. Control the drain valve to block the outlet of the water channel and continue washing. After an interval of unit time, open the drain valve again to obtain the turbidity of the washing water. Until the difference between the turbidity values obtained twice in succession is less than the first preset value, the washing program is ended.

During the laundry rinsing process, the drain valve is controlled to open, and the turbidity detection device 10 obtains the turbidity value of the water in the communication chamber 12. If the difference between the turbidity value of the current rinse water and the initial turbidity value is less than or equal to the second preset When setting the value, keep the drain valve open and end the rinsing process. If the difference between the turbidity value of the current rinse water and the initial turbidity value is greater than the second preset value, keep the drain valve open. After the water is drained, the drain valve is controlled to close, the water inlet valve is controlled to enter water, and the rinsing procedure is performed again until the difference between the turbidity value of the current rinsing water and the initial turbidity value is less than the second preset value, and the rinsing procedure is ended.

Specifically, after the laundry is finished washing, the washing water in the washing tub 2 is drained and fresh water is refilled into the washing tub 2. After the water filling is completed, the rinsing program is entered. After the rinsing is completed, the drain valve is controlled to open, and the turbidity detection device 10 obtains The turbidity value A3 of the rinse water. When the difference between A3 and A0 is less than or equal to the second preset value, it means that the clothes are rinsed clean, keep the drain valve open, and drain the rinse water to end the rinsing process. If A3-A0 is greater than the first Second preset value, it means that the clothes have not been rinsed, then the drain valve is closed after the rinse water is drained, and water is filled into the washing tub 2 again for rinsing until the difference between the current turbidity value of the rinse water and the initial turbidity value If it is less than the second preset value, the rinsing program ends. The initial turbidity value V0 can be obtained during the water injection process of the washing program, or during the water injection process of the rinsing program.

The above are only the preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed as above in preferred embodiments, it is not intended to limit the present invention. Any technology familiar with this patent Without departing from the scope of the technical solution of the present invention, the personnel can use the technical content suggested above to make slight changes or modification into equivalent embodiments with equivalent changes, but any content that does not depart from the technical solution of the present invention is based on the technology of the present invention Essentially, any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the present invention.

Claims

A washing machine includes a washing tub, and the washing tub independently holds washing water during washing. The washing tub is characterized in that it includes a detection water channel which is in communication with the washing tub and further includes a turbidity detection device. The degree detection device detects the turbidity of the water in the detection water channel.
The washing machine according to claim 1, further comprising a water collecting device with a water collecting cavity inside, at least the bottom of the washing tub is arranged in the water collecting device, and the detecting water channel includes A communication chamber on the water collection device and rotatably and sealedly communicated with the bottom of the washing tub, and the turbidity detection device is arranged in the communication chamber.
The washing machine according to claim 1, further comprising a water collecting device with a water collecting cavity inside, at least the bottom of the washing tub is arranged in the water collecting device, and the detecting water channel includes A communication chamber on the water collection device and rotatably and sealedly communicated with the bottom of the washing tub and a communication pipeline communicating with the communication chamber, and the turbidity detection device is provided in the communication pipe On the way.
A washing machine according to claim 2 or 3, characterized in that the bottom of the washing tub is provided with a communication port, the communication chamber is provided with a water inlet at a position corresponding to the communication port, and the inlet The nozzle is rotatably and sealedly connected with the communication port;

Preferably, the middle of the bottom of the washing tub is assembled on the dehydration shaft of the washing machine, the water inlet is arranged in a ring structure surrounding the dehydration shaft, the bottom of the inner tub is protrudingly provided with a convex ring structure, the The convex ring structure is rotatably and sealedly fitted with the annular structure, and the communication port is arranged in the convex ring structure.
The washing machine according to claim 4, further comprising a circulating water pump and a circulating pipe, the communicating pipe is in communication with the water inlet of the circulating water pump, and the outlet of the circulating water pump is in communication with the circulating water pump. A pipeline, and the circulation pipeline communicates with the washing tub.
The washing machine according to claim 5, further comprising a drain pipe, the drain pipe is connected with the water outlet of the circulating water pump or the circulating pipe; a drain solenoid is provided on the drain pipe A valve, a circulating solenoid valve is arranged on the circulating pipeline.
The washing machine according to claim 1, further comprising a water collecting device with a water collecting cavity inside, at least the bottom of the washing tub is arranged in the water collecting device, and the detecting water channel includes A communication chamber on the water collection device and rotatably and sealedly communicated with the bottom of the washing tub, a water outlet is provided on the bottom wall of the water collection device, and the water outlet is covered by the communication chamber, The water outlet is also provided with a drain valve, and the turbidity detection device is arranged inside the communication chamber or on the drain valve.
A method for controlling a washing machine according to any one of claims 1-7, characterized in that, during the laundry treatment process, it is determined whether to end the washing program and/or the rinsing program according to the detection result of the turbidity detection device.
The control method of a washing machine according to claim 8, characterized in that the circulating water pump is controlled to start during the laundry washing process, and the turbidity detection device obtains the turbidity value of the water in the detection waterway, if the currently detected turbidity value is equal to When the difference of the turbidity values detected last time is less than or equal to the first preset difference, the washing procedure is ended.
The control method of a washing machine according to claim 8, wherein the circulating water pump is controlled to start during the laundry rinsing process, and the turbidity detection device obtains and detects the turbidity value of the water in the water channel. When the difference between the initial turbidity values is less than or equal to the second preset value, the rinsing program ends.