A method of controlling drainage of a multi-cylinder fabric treatment apparatus and a multi-cylinder fabric treatment apparatus

Abstract

The application provides a drainage control method of a multi-drum fabric treatment device and the multi-drum fabric treatment device, and belongs to the technical field of fabric treatment devices. The drainage control method collects the running stage before the drainage program of each drum and / or the remaining time length of the drainage program, identifies the drum that is about to end, has the highest dirtiness or is most sensitive to the water content, gives it the priority of drainage, and then changes the priority into the physical layer of "opening first and closing later" with the aid of an independently controllable drainage execution component. Therefore, the drainage sequence is real-time linked with the real washing process, the most urgent drainage request can always obtain the channel in the first time, the instantaneous confluence and pipeline impact caused by the opening of multiple valves at the same time are avoided, the waiting time of the drum with high water content or high dirtiness is shortened, and the cross contamination risk and the dehydration efficiency loss are reduced.

Description

Technical Field

[0001] This application relates to the field of fabric processing equipment technology, and more specifically, to a drainage control method and a multi-tube fabric processing equipment. Background Technology

[0002] In existing technologies, washing machines are mostly single-drum structures, with each drum independently completing the washing, rinsing, and spin-drying processes. However, as users' demands for washing efficiency and space utilization increase, multi-drum washing machines are gradually becoming a research hotspot.

[0003] Among them, the multi-drum pulsator washing machine adopts a design in which multiple washing drums share a single drainage system. The overflow tee and the drain tee are interconnected to achieve the sharing of the drainage system, thereby reducing the number of parts and lowering manufacturing costs.

[0004] However, this structure has several problems in practical applications: when multiple washing drums are in the drainage stage at the same time, problems such as poor drainage and cross-contamination can easily occur, affecting the washing effect and user experience. Summary of the Invention

[0005] This application provides a drainage control method and the multi-drum fabric processing equipment. The drainage control method collects data on the running stage of each drum before the drainage process and / or the remaining time of the drainage process. It first identifies drums that are "about to finish," "have the highest dirtiness," or "are most sensitive to moisture content," granting them priority for drainage. Then, using an independently controllable drainage actuator, this priority is physically translated into "open first, close later." Thus, the drainage sequence is linked to the actual washing process in real time, ensuring that the most urgent drainage request always gets access first. This avoids instantaneous confluence and pipeline impact caused by multiple valves opening simultaneously, shortens the waiting time for drums with high moisture content or high dirtiness, and reduces the risk of cross-contamination and loss of dehydration efficiency. Specifically:

[0006] The first aspect of this application provides a drainage control method for a multi-roller fabric processing device. The fabric processing device has multiple washing drums that share a single drainage system, and each washing drum is equipped with an independently controllable drainage actuator. The drainage control method includes:

[0007] When at least two washing drums have a drainage requirement, obtain the operating status information of each washing drum;

[0008] Based on the operating status information, determine the drainage priority of each washing drum;

[0009] The opening and closing of the corresponding drainage actuators are controlled according to the drainage priority to perform drainage operations;

[0010] The operational status information includes at least the operational phase before the drainage procedure is executed and / or the remaining duration of the drainage procedure.

[0011] In the above technical solution, the operation phase includes at least the main washing phase, the rinsing phase, and the dehydration phase;

[0012] When at least two washing drums simultaneously issue drainage requests, the drainage priority of each washing drum is determined based on the operating status information, including:

[0013] Obtain the operating stage of each washing drum before the drainage process is executed;

[0014] The drainage priority of each washing drum is determined based on the preset operation phase priority rules, and the corresponding drainage execution unit is activated according to the drainage priority to perform the drainage operation;

[0015] The preset priority rule for operation stages is: dehydration stage > main wash stage > rinsing stage.

[0016] In the above technical solution, the operation phase includes at least the main washing phase, the rinsing phase, and the dehydration phase;

[0017] When at least two drums successively issue drainage requests, the drainage priority of each washing drum is determined based on the operating status information, including:

[0018] Obtain the operating phase of each washing drum before the drainage program is executed, and the remaining drainage time of the washing drum currently executing the drainage program;

[0019] Based on the preset operation phase priority rules and the remaining drainage time of the washing drum that is currently executing the drainage program, the drainage priority of each washing drum is determined, and the corresponding drainage execution unit is activated according to the drainage priority to perform the drainage operation.

[0020] The preset priority rule for operation stages is: dehydration stage > main wash stage > rinsing stage.

[0021] In the above technical solution, the drainage priority of each washing drum is determined based on preset operation phase priority rules and the remaining drainage time of the washing drum currently executing the drainage program, including:

[0022] If the two drums that issue drainage requests successively are in different operating phases, and the remaining time of the washing drum in the high-priority operating phase is greater than the preset time threshold, while the remaining time of the washing drum in the low-priority operating phase is less than or equal to the preset time threshold, then the drainage priority of the washing drum in the low-priority operating phase will be temporarily increased, and the adjustment time will not exceed the remaining time of the low-priority operating phase.

[0023] In the above technical solution, during the process of performing drainage operations according to drainage priority, the drainage control method further includes:

[0024] Real-time acquisition of drainage operating parameters of the drainage system; dynamic adjustment of drainage priority of each washing drum and / or opening and closing status of drainage actuators based on drainage operating parameters.

[0025] Drainage operating parameters include at least one of the following: pressure value in the drainage pipeline, drainage flow rate, and drainage velocity.

[0026] The above technical solution includes dynamically adjusting the drainage priority of each washing drum and / or the opening and closing state of the drainage actuator, including:

[0027] When the drainage operating parameters reach the preset threshold, the drainage execution component of the low drainage priority washing drum is adjusted so that the drainage system operating parameters are lower than the preset threshold.

[0028] When regulating the drainage actuator of a washing drum with low drainage priority, the regulation method includes at least one of pausing drainage, slowing down drainage, and intermittent drainage.

[0029] In the above technical solution, dynamically adjusting the drainage priority of each washing drum and / or the opening and closing state of the drainage actuator includes:

[0030] Pause the drainage actuator of the low-priority washing drum, and keep the drainage actuator of the high-priority washing drum on until the drainage parameters are lower than the preset threshold.

[0031] In the above technical solution, during the process of performing drainage operations according to drainage priority, the drainage control method further includes:

[0032] Real-time monitoring of the operating status of each washing drum to check for changes;

[0033] If the operating status information of any washing drum changes, the drainage priority of that washing drum is re-determined based on the changed operating status information, and the overall drainage priority ranking is updated.

[0034] In the above technical solution, the washing drums at different operating stages have different drainage control logics when performing drainage operations; the drainage control methods include:

[0035] When there is a washing drum in the spin-drying stage, the drainage control logic includes: prioritizing the activation of the drainage execution component of the washing drum in the spin-drying stage, and maintaining the drainage execution component fully open during the drainage process until the spin-drying stage is completed; if there are multiple washing drums in the spin-drying stage, the progress information of each spin-drying stage is obtained, and the washing drum with a spin-drying process ≥50% is prioritized for drainage.

[0036] In the above technical solution, when there is a washing drum in the main washing stage, the drainage control method includes: the opening degree of the drainage actuator of the washing drum in the main washing stage is set to 80%-100%. If the drainage operating parameters of the drainage system are detected to be close to the preset threshold, the opening degree is reduced to 50%-70%, but it shall not stop draining before the washing drum in the spin-drying stage; during the drainage process of the main washing stage, the turbidity data of the sewage is monitored in real time. If the turbidity is ≥ the preset turbidity threshold, the current drainage priority remains unchanged. If the turbidity is < the preset turbidity threshold, its drainage priority can be reduced.

[0037] In the above technical solution, when there is a rinsing stage in the washing drum, the drainage control method includes: setting the opening degree of the drainage actuator of the washing drum in the rinsing stage to 50%-80%, and when there is a drainage request in the washing drum in the spin-drying stage or the main wash stage, the drainage operation of the rinsing stage is suspended first; if the rinsing stage is the last rinsing, its drainage priority can be increased to the same level as the main wash stage.

[0038] The second aspect of this application provides a multi-tube fabric processing device that employs the above-described drainage control method.

[0039] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0040] In this embodiment, by collecting the running stage before the drainage process of each drum and / or the remaining time of the drainage process, the drums that are "about to end," "most dirty," or "most sensitive to moisture content" are first identified and given priority for drainage. Then, with the help of an independently controllable drainage execution component, the priority is transformed into a physical "open first, close later" principle. As a result, the drainage sequence is linked to the actual washing process in real time, and the most urgent drainage request can always get access first. This avoids instantaneous flow and pipeline impact caused by multiple valves opening at the same time, and shortens the waiting time of drums with high moisture content or high dirtiness, reducing the risk of cross-contamination and loss of dehydration efficiency. Attached Figure Description

[0041] Figure 1 This is a logic control diagram of the drainage control method in the embodiments of this application. Detailed Implementation

[0042] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0043] Throughout the specification and claims, the following terms will have at least the meaning explicitly associated herein, unless the context otherwise requires. The meanings defined below are not intended to limit the terms, but are merely illustrative examples.

[0044] In the description of this invention, the phrase "in one embodiment" does not necessarily refer to the same embodiment, although it may refer to the same embodiment. Similarly, the phrase "in some embodiments," as used herein, does not necessarily refer to the same embodiment when used multiple times, although it may refer to the same embodiment. As used herein, the term "or" is an inclusive "or" operator and is equivalent to the term "and / or," unless the context clearly specifies otherwise. The term "based on" is not exclusive and allows for reliance on additional factors not described, unless the context clearly specifies otherwise. The word "exemplary" herein means "used as an example, instance, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior to or better than other embodiments. The scope of this invention is limited only by the scope of the appended claims, and any examples set forth in this specification are not intended to be limiting, but merely illustrate some of the many possible embodiments of the claimed invention. The various embodiments provided in this invention should not be construed as limiting the scope of protection of this invention.

[0045] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0047] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] Example

[0050] like Figure 1 As shown, the first aspect of this application provides a drainage control method for a multi-roller fabric processing device, wherein the fabric processing device has multiple washing drums, the multiple washing drums share a drainage system, and each washing drum is equipped with an independently controllable drainage actuator, wherein the drainage control method includes:

[0051] When at least two washing drums have a drainage requirement, obtain the operating status information of each washing drum;

[0052] Based on the operating status information, determine the drainage priority of each washing drum;

[0053] The opening and closing of the corresponding drainage actuators are controlled according to the drainage priority to perform drainage operations;

[0054] The operational status information includes at least the operational phase before the drainage procedure is executed and / or the remaining duration of the drainage procedure.

[0055] In this embodiment, by collecting the running stage before the drainage process of each drum and / or the remaining time of the drainage process, the drums that are "about to end," "most dirty," or "most sensitive to moisture content" are first identified and given priority for drainage. Then, with the help of an independently controllable drainage execution component, the priority is transformed into a physical "open first, close later" principle. As a result, the drainage sequence is linked to the actual washing process in real time, and the most urgent drainage request can always get access first. This avoids instantaneous flow and pipeline impact caused by multiple valves opening at the same time, and shortens the waiting time of drums with high moisture content or high dirtiness, reducing the risk of cross-contamination and loss of dehydration efficiency.

[0056] It should be noted that the "drainage demand" referred to in this application embodiment refers to the state where two or more washing drums need to drain at any point in time: this includes the situation where all drums issue drainage requests at the same time, as well as the situation where the previous drum has been draining for a period of time and the next drum issues its request at a staggered time. Regardless of whether the request times overlap, the system collects the operating status information of each drum in real time and sorts it uniformly to ensure that the subsequent priority judgment and the opening and closing control of the drainage execution components are always based on the latest and most complete competitive queue, thereby incorporating "simultaneous rush to drain" or "sequential queue jumping" into the same set of flexible scheduling logic, avoiding instantaneous confluence and ensuring priority for urgent drainage.

[0057] Furthermore, in some possible implementations, the operation phase includes at least a main wash phase, a rinsing phase, and a dehydration phase;

[0058] When at least two washing drums simultaneously issue drainage requests, the drainage priority of each washing drum is determined based on the operating status information, including:

[0059] Obtain the operating stage of each washing drum before the drainage process is executed;

[0060] The drainage priority of each washing drum is determined based on the preset operation phase priority rules, and the corresponding drainage execution unit is activated according to the drainage priority to perform the drainage operation;

[0061] The preset priority rule for operation stages is: dehydration stage > main wash stage > rinsing stage.

[0062] Specifically, when two or more drums request drainage simultaneously, the controller no longer needs to analyze complex timing sequences; it can instantly sort them by stage labels. The spin-dry drum always gets a drainage channel first, ensuring that the moisture content of the clothes does not rebound due to waiting. The main wash drum follows closely behind, promptly sending the dirtiest wash water away from the pipes, reducing stain retention and cross-contamination. The rinsing drum leaves last, using the preceding water flow to pre-wash the pipe walls, reducing detergent residue. Stage priority is decoupled from subsequent variables such as pressure and duration, making the drainage order clear at a glance. This shortens decision-making time and provides a stable benchmark sequence for subsequent parallel, pressure-limited, or healthy cleaning strategies, achieving efficient, low-noise, and low-pollution multi-drum shared drainage operation.

[0063] More specifically, when at least two drums successively issue drainage requests, the drainage priority of each washing drum is determined based on the operating status information, including:

[0064] Obtain the operating phase of each washing drum before the drainage program is executed, and the remaining drainage time of the washing drum currently executing the drainage program;

[0065] Based on the preset operation phase priority rules and the remaining drainage time of the washing drum that is currently executing the drainage program, the drainage priority of each washing drum is determined, and the corresponding drainage execution unit is activated according to the drainage priority to perform the drainage operation.

[0066] The preset priority rule for operation stages is: dehydration stage > main wash stage > rinsing stage.

[0067] In this embodiment, when the competing device for the subsequent requesting drum is not an empty pipe, but a "predecessor" that has been draining for some time, the controller first compares the stages according to a fixed order of "spin-dry > main wash > rinse," and then compares the "remaining time." This allows the drum that is about to finish to continue draining, avoiding water flow interruptions and pressure fluctuations caused by changing valves midway. Thus, it ensures that urgent drainage needs such as spin-dry and main wash have absolute priority in the stage dimension, while also achieving optimal sorting of different stage drums in terms of "who finishes faster," reducing the overall total drainage time.

[0068] Furthermore, in some possible implementations, the drainage priority of each washing drum is determined based on preset operation phase priority rules and the remaining drainage time of the washing drum currently executing the drainage program, including:

[0069] If the two drums that issue drainage requests successively are in different operating phases, and the remaining time of the washing drum in the high-priority operating phase is greater than the preset time threshold, while the remaining time of the washing drum in the low-priority operating phase is less than or equal to the preset time threshold, then the drainage priority of the washing drum in the low-priority operating phase will be temporarily increased, and the adjustment time will not exceed the remaining time of the low-priority operating phase.

[0070] In this embodiment, when the high-stage cylinder still has a long remaining drainage time while the low-stage cylinder has only a short time left to finish, the controller raises the priority of the low-stage cylinder all at once and limits its elevation time to no more than its own remaining time. In this way, the high-stage cylinder does not need to be interrupted, and the low-stage cylinder can quickly complete drainage by taking advantage of the tail section gap, thus compressing the overall drainage time.

[0071] Furthermore, in some possible implementations, during the process of performing drainage operations according to drainage priorities, the drainage control method further includes:

[0072] Real-time acquisition of drainage operating parameters of the drainage system; dynamic adjustment of drainage priority of each washing drum and / or opening and closing status of drainage actuators based on drainage operating parameters.

[0073] Drainage operating parameters include at least one of the following: pressure value in the drainage pipeline, drainage flow rate, and drainage velocity.

[0074] In this embodiment, by continuously monitoring pipeline pressure, flow rate, or velocity, the original one-time priority decision-making is upgraded to dynamic closed-loop control. When pressure suddenly increases, flow rate drops sharply, or velocity falls below a threshold, the system can immediately pause low-priority cylinders, prematurely end the current drainage, or extend the drainage time of high-priority cylinders, thereby matching the "priority rules" with the "actual pipeline capacity" in real time. This dynamic adjustment mechanism retains the dehydration efficiency and dirty water discharge advantages brought by phase priority, while automatically limiting flow and depressurizing in case of abnormal operating conditions, avoiding instantaneous confluence, slow drainage, and noise surges caused by multiple valves overlapping. At the same time, the operating parameters, combined with strategies such as remaining time and accumulated mileage, provide real-time data entry for subsequent parallel drainage, healthy cleaning, and abnormal self-recovery. This allows the same hardware to achieve comprehensive performance of high response, pressure stability, low power consumption, and long lifespan without adding mechanical parts, significantly improving the reliability and user experience of multi-cylinder shared drainage systems.

[0075] Furthermore, in some possible implementations, dynamically adjusting the drainage priority of each washing drum and / or the opening / closing state of the drainage actuator includes:

[0076] When the drainage operating parameters reach the preset threshold, the drainage execution component of the low drainage priority washing drum is adjusted so that the drainage system operating parameters are lower than the preset threshold.

[0077] When regulating the drainage actuator of a washing drum with low drainage priority, the regulation method includes at least one of pausing drainage, slowing down drainage, and intermittent drainage.

[0078] In this embodiment of the fabric treatment equipment, once the drainage pressure, flow rate, or flow velocity reaches the upper limit during drainage, the system immediately implements three flexible controls on the low-priority cylinder: pause, deceleration, or intermittent flow. This allows for "soft valve closure" or "flow reduction" within milliseconds without modifying the pipeline structure, instantly reducing the peak flow. The control amplitude only applies to the low-priority side, while the high-priority cylinder continues normal drainage, ensuring that dewatering efficiency and the dirty water priority strategy are not sacrificed. Through the combination of "one pipeline, three flow-limiting methods," the equipment can automatically switch pressure relief modes under different dirt loads and concurrent flow rates. This prevents noise, backflow, and slow drainage caused by instantaneous impacts, while avoiding water hammer and valve wear caused by hard shut-off. It achieves multiple benefits including pressure stabilization, quiet operation, energy saving, and long lifespan, and seamlessly solves the user's pain point of "simultaneous drainage jams in multiple cylinders."

[0079] Furthermore, in some possible implementations, dynamically adjusting the drainage priority of each washing drum and / or the opening / closing state of the drainage actuator includes:

[0080] Pause the drainage actuator of the low-priority washing drum, and keep the drainage actuator of the high-priority washing drum on until the drainage parameters are lower than the preset threshold.

[0081] Specifically, in this embodiment of the fabric processing equipment, once the drainage pressure, flow rate, or velocity reaches a threshold, all low-priority drainage actuators are immediately shut down, leaving only the high-priority cylinders to continue draining. This brings the operating parameters back to a safe range with the fewest valve positions and the shortest time. This method rapidly reduces the catchment area during extreme concurrency or sudden blockages, minimizing instantaneous impact and noise, and ensuring that critical drainage during the dehydration or main wash stages is not interrupted. Simultaneously, single-valve operation reduces water flow turbulence, preventing foam overflow and sewage backflow, and providing a stable window for rearrangement. This strategy requires no additional hardware; it only reuses existing priority queues and valve control signals to automatically depressurize at the "critical pressure" moment by prioritizing high-priority cylinders over low-priority ones. This balances drainage efficiency, system safety, and valve lifespan, significantly improving the reliability and user experience of multi-cylinder shared drainage systems under peak conditions.

[0082] Furthermore, in some possible implementations, during the process of performing drainage operations according to drainage priorities, the drainage control method further includes:

[0083] Real-time monitoring of the operating status of each washing drum to check for changes;

[0084] If the operating status information of any washing drum changes, the drainage priority of that washing drum is re-determined based on the changed operating status information, and the overall drainage priority ranking is updated.

[0085] In this embodiment, the operating status information of each washing drum is continuously monitored during the drainage process. Once a drum jumps from the main wash to the rinse or ends the spin-drying process prematurely, the priority is immediately recalculated based on the latest stage and remaining time, and the overall queue is refreshed. This ensures that "jumping the queue" or "leaving early" is included in the scheduling in real time. This ensures that drums at higher stages always have the latest and most accurate priority, avoids old sorting causing drums in urgent need of drainage to wait, and prevents drums that have finished their work from continuing to occupy the drainage channel. This shortens the total drainage time, maintains the spin-drying efficiency and the advantage of draining dirty water first, and achieves zero gaps and zero misjudgments under dynamic priority. This improves the response speed and resource utilization of the multi-drum shared drainage system.

[0086] Furthermore, in some possible implementations, the washing drums at different operating stages have different drainage control logic when performing drainage operations; the drainage control methods include:

[0087] When there is a washing drum in the spin-drying stage, the drainage control logic includes: prioritizing the activation of the drainage execution component of the washing drum in the spin-drying stage, and maintaining the drainage execution component fully open during the drainage process until the spin-drying stage is completed; if there are multiple washing drums in the spin-drying stage, the progress information of each spin-drying stage is obtained, and the washing drum with a spin-drying process ≥50% is prioritized for drainage.

[0088] In this embodiment, the "spinning stage" is given the highest priority and assigned a dedicated drainage logic: as soon as the system detects the spin-drying drum, all valves are immediately opened, maintaining maximum flow capacity throughout the process to ensure that the water spun out at high speed leaves the machine instantly, reducing the moisture content of the clothes; if multiple spin-drying drums exist simultaneously, their progress information is further compared, allowing the drums that have completed more than half of the spin-drying to drain first, avoiding prolonged spin-drying time due to water backflow during the high-speed phase in the latter half. This achieves "first-come, first-served, full-flow operation" during the critical spin-drying period, maximizing spin-drying efficiency while reducing motor load and vibration noise caused by high-speed waiting, balancing performance and lifespan, and significantly improving the reliability and user experience of the multi-drying shared drainage system in peak spin-drying scenarios.

[0089] Furthermore, in some possible implementations, when there is a main wash stage, the drainage control method includes: setting the opening degree of the drainage actuator of the main wash stage to 80%-100%; if the drainage operating parameters of the drainage system are detected to be close to a preset threshold, reducing its opening degree to 50%-70%, but it must not stop draining before the washing drum stops draining during the spin-drying stage; during the drainage process of the main wash stage, the turbidity data of the wastewater is monitored in real time; if the turbidity is ≥ the preset turbidity threshold, the current drainage priority remains unchanged; if the turbidity is < the preset turbidity threshold, its drainage priority can be reduced.

[0090] In this embodiment, the main wash stage employs a dual-control logic of "high flow rate + turbidity feedback": initially, the opening degree is maintained at a high level, allowing highly soiled wash water to quickly leave the system and reducing pipe wall deposition; once the operating parameters approach the threshold, the flow rate is immediately reduced proportionally, both relieving pressure and ensuring the priority of the dehydration drum is not interrupted; simultaneously, real-time turbidity data quantifies the level of "dirtiness," maintaining the original priority until the standard is met, and actively downgrading the priority after the standard is met, making the main wash drainage both fast and accurate. Thus, under the premise of stable pressure, "dirty water leaves early, clean water can be released slowly," reducing cross-contamination and detergent residue, while also considering energy saving, quiet operation, and pipe cleanliness, improving the overall efficiency and hygiene level of the multi-drum shared drainage system.

[0091] Furthermore, in some possible implementations, when there is a rinsing stage in the washing drum, the drainage control method includes: setting the opening degree of the drainage actuator of the washing drum in the rinsing stage to 50%-80%, and when there is a drainage request in the washing drum during the spin-drying stage or the main wash stage, prioritizing the suspension of drainage operation in the rinsing stage; if the rinsing stage is the last rinse, its drainage priority can be increased to the same level as the main wash stage.

[0092] In this embodiment, the rinsing stage is designed as a flexible branch with "low flow rate and pause capability": initially, the opening degree is only half-open to slightly more than half-open, participating in drainage without causing additional impact on the main pipeline; when a higher priority spin-drying or main wash drum joins the queue, the rinsing drum is paused first, allowing the channel to instantly give way to urgent drainage needs, ensuring spin-drying efficiency and prioritizing the drainage of dirty water; once it is identified as the last rinse, the system immediately raises its priority to the same level as the main wash, preventing residual rinsing liquid from affecting the cleanliness of the clothes. This dynamic switching between "slow and urgent" achieves the dual goals of resource allocation and cleanliness assurance, balancing pressure stabilization, energy saving, and garment care quality, thus improving the overall reliability and user experience of the multi-drum shared drainage system.

[0093] Furthermore, in some possible implementations, the drainage control method further includes:

[0094] Calculate the cumulative drainage volume and / or cumulative drainage duration of the main drainage road;

[0095] When the cumulative drainage volume and / or cumulative drainage duration exceed the corresponding set value, the self-cleaning program for the main drainage channel is activated.

[0096] In this embodiment, in addition to priority drainage and pressure protection, a "mileage maintenance" mechanism is added to the main drainage line: by accumulating the total water volume or total duration of each cylinder's drainage, the invisible "pipeline aging and dirt accumulation" are transformed into quantifiable numerical indicators. Once the set mileage is exceeded, self-cleaning is automatically triggered without the need for user memory or manual button presses. This mechanism links the cleaning timing to the actual usage intensity, avoiding over-maintenance or under-maintenance caused by fixed cycles. It ensures that the main drainage line is flushed in time before the dirt threshold is reached, inhibiting odors and bacterial growth, while preventing meaningless high-frequency cleaning that wastes water, electricity, and consumables. Thus, it extends the life of the entire machine with the lowest maintenance cost and continuously maintains the efficiency and hygiene of the multi-cylinder shared drainage system.

[0097] Furthermore, in some possible implementations, the total drainage volume can be collected by installing a Hall effect water meter, ultrasonic flow meter, or turbine flow meter at the outlet of the main drainage pipeline to accumulate the instantaneous flow rate of each discharge in real time; alternatively, an independent flow meter can be installed at the front end of each washing drum drain valve, and the controller can accumulate the flow pulses of each valve to the total water volume register. The total collection time can be recorded by starting a timer in the controller firmware when any drain valve is opened and stopping the timer when all valves are closed, and writing the duration of each drainage to non-volatile memory for long-term accumulation; alternatively, the total system running time since the first power-on can be recorded, and the effective drainage period can be extracted according to the "drain valve open" flag to achieve soft timing accumulation. Neither method requires additional high-precision components, and existing valve control signals and MCU clocks can be reused to complete low-cost, high-precision "mileage" statistics, providing a quantitative basis for subsequent self-cleaning.

[0098] Furthermore, in some possible implementations, the self-cleaning process includes a light self-cleaning degree and a deep self-cleaning process;

[0099] Initiate the self-cleaning procedure for the main drainage system, including:

[0100] Choose between a light self-cleaning procedure or a deep self-cleaning procedure based on the proportion of each operating phase in the cumulative drainage volume and / or cumulative drainage duration.

[0101] In this embodiment, the cumulative total is further broken down into the proportions of three stages: main wash, rinsing, and dehydration. The cleaning depth is determined by the "dirty water ratio" rather than simply "mileage": a high proportion in the main wash stage indicates a large amount of dirt deposited in the pipes, and the system automatically upgrades to deep self-cleaning, thoroughly removing oil and bacteria through high-pressure rinsing and disinfection; if the dehydration stage is dominant, only a short-duration, low-flow-rate light self-cleaning is performed, saving water, electricity, and consumables. This achieves differentiated maintenance based on "dirt level," avoiding over-cleaning caused by a one-size-fits-all approach while ensuring that truly dirty pipes receive sufficient flushing intensity. This maintains the long-term cleanliness of the main drainage system with minimal resource consumption, suppresses odors and secondary pollution, extends the overall lifespan of the machine, and improves the user experience.

[0102] It should be noted that, in the embodiments of this application, "the proportion of each operating stage" refers to the percentage of the "stage drainage volume" or "stage drainage time" corresponding to each of the main wash stage, rinsing stage, and dehydration stage out of the total accumulated drainage time or total drainage volume of the controller. For example, if the total accumulated drainage volume is 100 L, of which the main wash stage accounts for 60 L, the rinsing stage accounts for 25 L, and the dehydration stage accounts for 15 L, then the proportions of the three are 60%, 25%, and 15%, respectively. Similarly, if the statistics are based on time, the share of each stage in the total accumulated time can also be obtained.

[0103] It's also worth noting that, in terms of water contamination, the main wash stage removes a large amount of detergent, stains, and free dyes, resulting in the dirtiest drainage. The rinsing stage continues to remove residual detergent and a small amount of suspended dirt, with a slightly lower level of contamination. The spin-drying stage primarily separates the free water from the surface of the clothes, containing the least amount of dirt and producing the cleanest drainage. Therefore, by comparing the proportions of these three stages, the "dirty water ratio" can quantify the actual contamination load on the pipes, providing a direct basis for choosing between light or deep self-cleaning, and enabling precise maintenance by using the appropriate level of cleaning power for the dirtiest areas.

[0104] Furthermore, in some possible implementations, a mild self-cleaning or deep self-cleaning procedure is selected based on the proportion of each operating phase in the cumulative drainage volume and / or cumulative drainage duration, including:

[0105] If the main wash stage accounts for more than 50%, then a deep self-cleaning procedure will be performed.

[0106] Conversely, depending on the proportion of rinsing and dehydration stages, either a light self-cleaning or deep self-cleaning procedure can be performed.

[0107] In this embodiment, the primary washing stage's percentage of washing exceeds half is used as a "fast track." Once it does, deep cleaning is immediately locked, eliminating the need to calculate other details and significantly shortening decision-making time. If the washing percentage is less than half, the relative proportions of rinsing and spin-drying are introduced for a secondary assessment. Utilizing the characteristic that "rinsing is dirtier than spin-drying," a higher rinsing percentage than spin-drying percentage is considered a potential residual risk, and deep cleaning is still performed; otherwise, light cleaning is executed. Thus, while ensuring deep rinsing is guaranteed when the "dirtiest water" dominates, the "medium dirtiness" scenario is further subdivided. This avoids overlooking hidden dirt and prevents excessive consumption of water, electricity, and consumables, achieving a dynamic balance between decision-making speed, cleaning intensity, and resource conservation, continuously improving the hygiene level of the main drainage path and the overall economic efficiency of the machine.

[0108] Furthermore, in some possible implementations, a deep self-cleaning procedure or a light self-cleaning procedure is selected based on the proportion of the rinsing stage and the dehydration stage.

[0109] If the rinsing stage accounts for a larger proportion than the dehydration stage, a deep self-cleaning procedure will be performed.

[0110] Conversely, perform a mild self-cleaning procedure.

[0111] In this embodiment, the boundary condition of "washing ratio ≤ 50%" is further subdivided into a "dirtiness contest" between rinsing and dehydration: when the rinsing ratio is higher than the dehydration ratio, it is considered that there is still a lot of residual detergent and suspended dirt, and deep self-cleaning is directly initiated, using higher flow rate, longer rinsing time and disinfection steps to thoroughly remove moderate contaminants; if the dehydration ratio is equal to or higher than the rinsing ratio, it is determined that the main body is already relatively clean spin-dried water, and only a short-duration, low-flow-rate light self-cleaning is required. Thus, a precise gate is set up in the "moderate dirtiness" range, which not only prevents secondary pollution of the pipeline and odor rebound caused by excessive rinsing water, but also avoids wasting water, electricity and consumables when clean water is the main component, achieving zero over-contamination and zero leakage in the "secondary dirty water" scenario, and continuously maintaining the high efficiency, low consumption and long life of the main drainage pipeline.

[0112] Furthermore, in some possible implementations, the mild self-cleaning procedure includes flushing with clean water into the drain pipe.

[0113] The deep self-cleaning process includes simultaneously injecting disinfectant and / or bactericide into the drain pipe during the clean water rinsing process.

[0114] The self-cleaning method provided in this application embodiment includes two levels of self-cleaning: "light" and "deep," offering differentiated execution schemes. The light stage uses only clean water rinsing to remove loose foam and surface dirt, avoiding waste of disinfection consumables. The deep stage introduces disinfectant and / or bactericide while rinsing with clean water, allowing high-pressure water flow and chemical sterilization to work simultaneously, doubly stripping and inactivating oil stains, biofilms, and odor sources adhering to the pipe walls. This achieves precise resource matching of "light cleaning for light soiling and heavy cleaning for heavy soiling," ensuring that the main drainage pipe is fully sterilized after the accumulation of dirty water, while minimizing disinfectant usage, extending pipe life, reducing operating costs, and further improving the hygiene level and economy of multi-pipe shared drainage systems.

[0115] Furthermore, a second aspect of the present application also provides a multi-tube fabric processing device, which employs the drainage control method provided in the first aspect of the present application.

[0116] In this embodiment, the aforementioned drainage control method is integrated into the equipment level, enabling the multi-tube fabric processing equipment to come pre-installed with complete software logic including "priority drainage - pressure self-limitation - abnormal retry - mileage self-cleaning - dirt level classification." Hardware-wise, it only requires the existing shared drainage pipeline, independent drainage valves for each tube, a universal controller, and optional pressure / flow / time sensors. No additional mechanical interlocks or user interface are needed to automatically complete efficient drainage, fault self-rescue, and pipeline maintenance during operation. As a result, the equipment simultaneously achieves high dehydration efficiency, low cross-contamination, low maintenance frequency, and low noise, and the exclusivity of the method patent creates a differentiated selling point for the entire machine, enhancing market competitiveness and technological barriers.

[0117] Preferably, the fabric processing equipment mentioned above is a pulsator-type multi-drum washing machine.

[0118] In the above embodiments of this application, the descriptions of each embodiment have their own emphasis. Parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments. The steps illustrated in the related flowcharts can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowcharts, in some cases, the steps shown or described may be performed in a different order than that shown here. In other words, the order of steps described in the foregoing embodiments is merely an example. Reasonable adjustments to the order of steps based on the content of the embodiments of this application are also within the protection scope of the embodiments of this application.

[0119] The sequence numbers or order of description of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0120] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0121] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A drainage control method for a multi-tube fabric processing device, characterized in that, The fabric processing equipment is equipped with multiple washing drums, which share a common drainage system. Each washing drum is equipped with an independently controllable drainage actuator. The drainage control method includes: When at least two washing drums have a drainage requirement, obtain the operating status information of each washing drum; Based on the operating status information, determine the drainage priority of each washing drum; The opening and closing of the corresponding drainage execution component is controlled according to the drainage priority to perform the drainage operation; The operating status information includes at least the operating phase before the drainage procedure is executed and / or the remaining duration of the drainage procedure, wherein the operating phase includes at least the main wash phase, the rinsing phase, and the dehydration phase; When at least two drums successively issue drainage requests, determining the drainage priority of each washing drum based on the operating status information includes: Obtain the operating phase of each washing drum before the drainage program is executed, and the remaining drainage time of the washing drum currently executing the drainage program; Based on the preset operation phase priority rules and the remaining drainage time of the washing drum that is currently executing the drainage program, the drainage priority of each washing drum is determined, and the corresponding drainage execution unit is activated according to the drainage priority to perform the drainage operation. The preset priority rule for the operation stages is: dehydration stage > main wash stage > rinsing stage; The determination of the drainage priority of each washing drum based on preset operation phase priority rules and the remaining drainage time of the washing drum currently executing the drainage program includes: If the two drums that issue drainage requests successively are in different operating phases, and the remaining drainage time of the drum in the higher priority operating phase is greater than the preset time threshold, while the remaining drainage time of the drum in the lower priority operating phase is less than or equal to the preset time threshold, then the drainage priority of the drum in the lower priority operating phase will be temporarily increased, and the adjustment time will not exceed the remaining drainage time of the drum in the lower priority operating phase.

2. The drainage control method according to claim 1, characterized in that, When at least two washing drums simultaneously issue drainage requests, determining the drainage priority of each washing drum based on the operating status information includes: Obtain the operating stage of each washing drum before the drainage process is executed; The drainage priority of each washing drum is determined based on the preset operation phase priority rules, and the corresponding drainage execution unit is activated according to the drainage priority to perform the drainage operation; The preset priority rule for operation stages is: dehydration stage > main wash stage > rinsing stage.

3. The drainage control method according to claim 1, characterized in that, During the drainage operation performed according to drainage priority, the drainage control method further includes: Real-time acquisition of drainage operating parameters of the drainage system; dynamic adjustment of drainage priority of each washing drum and / or opening and closing status of drainage actuators based on drainage operating parameters. The drainage operating parameters include at least one of the following: pressure value in the drainage pipeline, drainage flow rate, and drainage velocity.

4. The drainage control method according to claim 3, characterized in that, The dynamic adjustment of the drainage priority of each washing drum and / or the opening and closing state of the drainage actuator includes: When the drainage condition parameters reach a preset threshold, the drainage execution component of the low drainage priority washing drum is adjusted so that the drainage condition parameters are lower than the preset threshold. When regulating the drainage actuator of a washing drum with low drainage priority, the regulation method includes at least one of pausing drainage, slowing down drainage, and intermittent drainage.

5. The drainage control method according to claim 3, characterized in that, The dynamic adjustment of the drainage priority of each washing drum and / or the opening and closing state of the drainage actuator includes: Pause the drainage actuator of the low-priority washing drum, and keep the drainage actuator of the high-priority washing drum on until the drainage parameters are lower than the preset threshold.

6. The drainage control method according to any one of claims 1-5, characterized in that, During the drainage operation performed according to the drainage priority, the drainage control method further includes: Real-time monitoring of the operating status of each washing drum to check for changes; If the operating status information of any washing drum changes, the drainage priority of that washing drum is re-determined based on the changed operating status information, and the overall drainage priority ranking is updated.

7. A multi-tube fabric processing device, characterized in that, The drainage control method includes any one of claims 1-6.

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