Integrated waterway system of multi-barrel washing machine, temperature control method and washing machine

Abstract

The invention relates to a multi-barrel washing machine integrated waterway system, a temperature control method and a washing machine, and belongs to the technical field of washing machines. The multi-barrel washing machine integrated waterway system comprises a waste heat recovery loop, a heater, a detergent pre-dissolving cavity, a mixing valve, a distribution valve, a temperature sensor array and a control system; through the core design that a waste heat recovery loop, a heater, a mixing valve and other components are in one-to-one correspondence with the washing modules, an independent water path link is constructed for each washing module, and the problem that multiple barrels of water paths interfere with one another in the prior art is effectively solved. The control system can accurately regulate and control power distribution of the corresponding heaters according to the requirements of different washing procedures, independent and accurate control over the water temperature of the washing barrels is achieved, and the washing temperature requirements of different types of clothes, underwear, common clothes and the like of infants and children are met.

Description

Technical Field

[0001] This application relates to an integrated water circuit system for a multi-tub washing machine, a temperature control method, and the washing machine itself. Background Technology

[0002] With the improvement of living standards, multi-tub washing machines have gradually become one of the mainstream products in the market due to their advantage of being able to wash clothes in separate sections simultaneously. However, the integrated water circuit system of existing multi-tub washing machines generally suffers from the core problem of poor temperature control accuracy: most products adopt a single water supply and then split design, and the water circuits of each washing module interfere with each other, making it impossible to achieve independent and precise temperature control according to the washing needs of different clothes, which seriously affects the effect of separate washing.

[0003] At the same time, the existing system has low energy efficiency and significant energy waste. The washing machine clutch generates a large amount of waste heat during operation, but the existing technology does not have an effective waste heat recovery structure. This waste heat is directly dissipated through the heat dissipation structure. Furthermore, the detergent dispensing and water heating processes are independent of each other and lack coordinated control, which further increases the energy consumption burden of the heating module and fails to meet users' needs for energy-saving operation of multi-tub washing machines. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this application provides an integrated water circuit system, temperature control method, and washing machine for multi-tub washing machines. The integrated water circuit system provided in this application, through a one-to-one correspondence design between waste heat recovery loops, heaters, and other components and the washing module, and the recovery and utilization of waste heat, can improve temperature control accuracy, optimize the sorting and washing effect, and simultaneously reduce energy consumption and improve system energy efficiency. This solves the core problems of poor temperature control accuracy and low energy efficiency in existing integrated water circuit systems for multi-tub washing machines.

[0005] In a first aspect, this application provides an integrated water circuit system for a multi-tub washing machine, including a waste heat recovery circuit, a heater, a detergent pre-dissolving chamber, a mixing valve, a dispensing valve, a temperature sensor array, and a control system; The waste heat recovery circuit, the heating channel of the heater, the liquid outlet of the detergent pre-dissolving chamber, the mixing valve, and the internal channels of the distribution valve correspond one-to-one with the multiple washing modules of the multi-tub washing machine; The waste heat recovery circuit is fitted to the clutch of the corresponding washing module, and its outlet is connected to the corresponding mixing valve through the corresponding heating channel of the heater; the outlet of the detergent pre-dissolving chamber is connected to the corresponding mixing valve, and the mixing valve is connected to the corresponding washing tub through the corresponding channel of the distribution valve. The temperature sensor array is used to collect water temperature data from each node of the integrated water system and transmit it to the control system; The control system is used to control the power distribution of the heater to heat the water in multiple heating channels according to the water temperature data and the preset washing program; when the water temperature is detected to be up to standard, the control valve opens the corresponding internal channel to inject the mixture into the corresponding washing tub.

[0006] Alternatively, the integrated water system may further include a branch system, with each branch system corresponding to a washing module; the branch system includes an anti-backflow branch system and an independent temperature control pipeline between the drums. The internal channel of the distribution valve, the corresponding anti-backflow branch system, the corresponding independent temperature control pipeline between the tubs, and the corresponding washing tub are connected in sequence.

[0007] Alternatively, the integrated water system may further include a miniaturized precision dispensing system; the miniaturized precision dispensing system includes a multi-chamber independent material box, a piezoelectric ceramic micro-pump, and an optical liquid level monitoring component; The outlet of the multi-cavity independent material box is connected to the inlet of the piezoelectric ceramic micro pump through a pipeline, and the outlet of the piezoelectric ceramic micro pump is connected to the inlet of the detergent pre-dissolving chamber. The optical liquid level monitoring component is correspondingly set with the multi-cavity independent material box. The control system is electrically connected to the piezoelectric ceramic micro-pump and the optical liquid level monitoring component, and is used to control the quantitative dispensing of detergent and monitor the remaining amount of detergent in the container.

[0008] Alternatively, the integrated water system may further include a three-way inlet unit. The inlet of the three-way water inlet unit is connected to an external water source, and the outlet is connected to the inlet of the waste heat recovery circuit and the inlet of the detergent pre-dissolving chamber, respectively. Each outlet of the three-way water inlet unit is equipped with an electromagnetic flow valve, which is electrically connected to the control system.

[0009] Alternatively, the integrated water system may further include a phase change thermal storage unit. The outlet of the waste heat recovery circuit, the phase change thermal storage unit, and the inlet of the mixing valve are connected in sequence.

[0010] Alternatively, the outlets of the multiple waste heat recovery loops can be connected to the inlet of the manifold, and the manifold can be connected to the inlet of the multiple mixing valves and the inlet of the detergent pre-dissolving chamber respectively through a diversion structure.

[0011] Alternatively, the waste heat recovery loop may be designed with a spiral groove water circuit. The waste heat recovery circuit is attached to the clutch housing via a silicone heat-conducting sleeve, and the inner side of the silicone heat-conducting sleeve is provided with a protruding structure that matches the spiral groove.

[0012] Secondly, this application provides a temperature control method for a multi-tub washing machine, which is applied to the aforementioned integrated water circuit system of the multi-tub washing machine, and includes the following steps: The sensor is activated to detect basic data, read the washing program, and self-check the status of the water circuit module. The target temperature for each tub is set according to the washing program, and the heat required for each tub is calculated based on the basic data. Based on the parameters of the washing program, the waste heat output is predicted and classified. At the same time, the washing program requirements of each washing tank are retrieved, and the matching relationship between waste heat and water supply is established. By adjusting the opening of the flow valve of the waste heat recovery loop 1, the amount of waste heat introduced into each branch is controlled to ensure that the waste heat utilization efficiency is maximized. Multiple tanks can be controlled in parallel. The heating power is dynamically allocated according to the heat demand, and the detergent dosing is scheduled simultaneously to achieve precise water supply and temperature control in parallel for multiple tanks. The system continuously monitors the operating status and optimizes control parameters to meet temperature control requirements and minimize energy consumption.

[0013] Alternatively, the formula for calculating the required heat is as follows: ; in: The water requirement for each bucket, The specific heat capacity of water, For the target temperature, This refers to the inlet water temperature. The total power of the heater (2) satisfies: ; in: This is the maximum power of the heater. , , These are the heating powers allocated to the corresponding heating channels of each washing tub.

[0014] Thirdly, this application provides a washing machine, including the above-mentioned multi-tub washing machine integrated water circuit system, and uses the above-mentioned multi-tub washing machine temperature control method for temperature control and water supply scheduling.

[0015] Compared with the prior art, this application provides an integrated water circuit system, temperature control method, and washing machine for multi-tub washing machines, which has the following beneficial effects: 1. Improved temperature control accuracy and optimized washing performance: Through a core design where "waste heat recovery circuits, heaters, mixing valves, and other components correspond one-to-one with the washing modules," an independent water circuit is constructed for each washing module, effectively avoiding the problem of mutual interference between multiple tubs in existing technologies. The control system can precisely adjust the power distribution of the corresponding heaters according to the needs of different washing programs, achieving independent and precise control of the water temperature in each washing tub, adapting to the washing temperature requirements of different categories such as baby clothes, underwear, and regular clothes.

[0016] 2. Waste heat recovery and utilization, reducing energy consumption and improving energy efficiency: By setting up a waste heat recovery loop and integrating it with the clutch, efficient recovery and utilization of waste heat from clutch operation is achieved, effectively solving the problems of waste heat waste and high heating energy consumption in existing technologies. The recovered waste heat is directly used for washing water supply after being reheated by the heater, significantly reducing the power consumption of the heater; at the same time, through the linkage of the temperature sensor array and the control system, combined with the coordinated design of the detergent pre-dissolving chamber and the mixing valve, the stability of the water supply temperature is further optimized while ensuring that the detergent is fully dissolved, thus improving the overall energy utilization efficiency of the system. Attached Figure Description

[0017] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a structural block diagram of the integrated water system for a multi-tub washing machine according to this application; Figure 2 This is a flowchart of the temperature control method for a multi-tub washing machine according to this application.

[0019] In the picture: 1. Waste heat recovery circuit; 2. Heater; 3. Detergent pre-dissolving chamber; 4. Mixing valve; 5. Distribution valve; 6. Temperature sensor array; 7. Anti-backflow branch system; 8. Independent temperature control pipeline between tanks; 9. Miniaturized precision dispensing system; 10. Three-way water inlet unit; 11. Phase change heat storage unit. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] Example 1 Please see Figure 1As shown, this application provides an integrated water system for a multi-tub washing machine. The integrated water system includes a multi-layer modular water system structure, a waste heat gradient utilization system, and a lower-level distribution and conveying module arranged sequentially from top to bottom within the washing machine body.

[0022] The multi-layer modular water circuit structure includes a heater 2 and a temperature sensor array 6. The heater 2 is a miniature instant heater, model MCH-001, which has multiple independent heating channels, each corresponding to a washing module.

[0023] The waste heat gradient utilization system includes a waste heat recovery loop 1, which can be integrally formed from copper alloy material.

[0024] The lower-level distribution and conveying module includes a detergent pre-dissolving chamber 3, a mixing valve 4, and a distribution valve 5. The distribution valve 5 adopts an electromagnetically driven multi-channel distribution structure, and the model can be DFL-008.

[0025] The temperature sensor array 6 can be composed of multiple PT100 platinum resistance sensors, with the model PT100-A, which are respectively set at the outlet of waste heat recovery circuit 1, the inlet and outlet of heater 2, the outlet of mixing valve 4, and the inlet of washing tub. Each sensor is equipped with an anti-scaling protective sleeve.

[0026] The connection relationships of each component are as follows: the waste heat recovery circuit 1 is attached to the clutch of the corresponding washing module, and its outlet is connected to the corresponding mixing valve 4 through the corresponding heating channel of the heater 2; the outlet of the detergent pre-dissolving chamber 3 is connected to the corresponding mixing valve 4, and the mixing valve 4 is connected to the corresponding washing tub through the corresponding channel of the distribution valve 5; the multi-channel temperature sensor array 6 is electrically connected to the control system and is used to collect water temperature data at each monitoring point and transmit it to the control system.

[0027] The control system is used to control the power distribution of heater 2 according to water temperature data and preset washing program to heat the water in multiple heating channels; when the water temperature reaches the standard, the control system is also used to control the distribution valve 5 to open the corresponding internal channel and inject the mixed liquid into the corresponding washing tub.

[0028] This application employs a core design where "waste heat recovery circuit 1, heater 2, mixing valve 4, and other components correspond one-to-one with the washing modules," constructing independent water circuit links for each washing module. This effectively avoids the problem of mutual interference between multiple tubs' water circuits in existing technologies. The control system can precisely adjust the power distribution of the corresponding heater 2 according to the needs of different washing programs, achieving independent and precise control of the water temperature in each washing tub, adapting to the washing temperature requirements of different categories such as baby clothes, underwear, and regular clothing.

[0029] By setting up a waste heat recovery loop 1 and engaging it with the clutch, efficient recovery and utilization of waste heat from clutch operation is achieved, effectively solving the problems of waste heat waste and high heating energy consumption in existing technologies. The recovered waste heat is directly used for washing water supply after being reheated by heater 2, significantly reducing the power consumption of heater 2. At the same time, through the linkage between temperature sensor array 6 and control system, and in conjunction with the coordinated design of detergent pre-dissolving chamber 3 and mixing valve 4, the stability of water supply temperature is further optimized while ensuring sufficient detergent dissolution, thus improving the overall energy utilization efficiency of the system.

[0030] In one embodiment, the heater 2 can be a miniature instantaneous heater, using a microchannel ceramic heating element, with a power range of 300W-800W and a volume controlled within 50cm³. It can achieve a second-level temperature rise response, quickly meet the temperature requirements of each washing tub, and improve heating efficiency and timeliness of temperature control.

[0031] In one embodiment, the temperature sensor array 6 may be composed of multiple PT100 platinum resistance sensors, the model of which may be PT100-A, respectively installed at the outlet of the waste heat recovery circuit 1, the inlet and outlet of the heater 2, the outlet of the mixing valve 4 and the inlet of the washing tub, and each sensor is equipped with an anti-scaling protective sleeve.

[0032] In one embodiment, the distribution valve 5 is an intelligent multi-way distribution valve, which is driven by a stepper motor to rotate the valve core and can selectively open 3-4 independent outlets to support parallel water supply to multiple tanks; each outlet is equipped with a miniature check valve and an air isolation chamber to further improve the backflow prevention effect and avoid cross-contamination of water circuits between tanks.

[0033] In one embodiment, the lower-level distribution and conveying module further includes a branch system, with each branch system corresponding to a different washing module. The branch system includes an anti-backflow branch system 7 and an independent temperature control pipeline between tanks 8; the anti-backflow branch system 7 uses a pilot-operated check valve, model XD-01, with an opening pressure of 0.05-0.1MPa and a closing response time of ≤0.2 seconds; the independent temperature control pipeline between tanks 8 uses PPR insulated pipe, model S5-De20, with an inner diameter of 15-20mm.

[0034] The internal channel of the distribution valve 5, the corresponding anti-backflow branch system 7, the corresponding independent temperature control pipeline between the tubs 8, and the corresponding washing tub are connected in sequence. A sealing joint is provided at the connection between the anti-backflow branch system 7 and the independent temperature control pipeline between the tubs 8. The sealing joint model can be selected as MF-02, and a nitrile rubber sealing gasket is used to improve the sealing performance of the pipeline connection. The specific model of the one-way valve of the anti-backflow branch system is sensitive to opening and closing, which can effectively prevent the liquid in the washing tub from flowing back and contaminating the water circuit. The specific model of PPR insulation pipe ensures the water temperature of each tub is stable and reduces temperature loss. The special sealing joint further improves the sealing performance of the pipeline and avoids leakage. Overall, the operation stability and reliability of the water circuit system are improved.

[0035] In one embodiment, the backflow prevention branch system 7 may employ a pilot-operated check valve with an opening pressure of 0.05-0.1 MPa and a closing response time of ≤0.2 seconds.

[0036] The valve body is equipped with a stainless steel filter screen with a pore size of 0.08-0.12mm, and the filter screen is designed to be removable and washable. The independent temperature control piping between tanks uses PPR insulated pipe with an inner diameter of 15-20mm. The outside of the pipe is wrapped with a polyurethane insulation layer with a thickness of 5-8mm, and the insulation layer is covered with an aluminum foil moisture-proof layer. The pipe joints are made using a hot-melt welding process, and the welded areas are wrapped with insulating sleeves.

[0037] In one embodiment, the integrated water system also includes a miniaturized precision delivery system 9.

[0038] The miniaturized precision dispensing system 9 includes a multi-chamber independent dispensing container, a piezoelectric ceramic micro-pump, and an optical level monitoring component. The outlet of the multi-chamber independent dispensing container is connected to the inlet of the piezoelectric ceramic micro-pump via a pipeline, and the outlet of the piezoelectric ceramic micro-pump is connected to the inlet of the detergent pre-dissolving chamber 3. The optical level monitoring component is correspondingly positioned to the multi-chamber independent dispensing container. The control system is electrically connected to the piezoelectric ceramic micro-pump and the optical level monitoring component, and is used to control the quantitative dispensing of detergent and monitor the remaining amount of detergent in the container.

[0039] The miniaturized precision dispensing system enables independent storage and precise dispensing of different types of detergents; the linkage between the control system and the dispensing system allows for dynamic adjustment of the dispensing amount according to the washing program; the optical liquid level monitoring component provides real-time feedback on the remaining detergent level, improving ease of use; and the overall system's intelligence level is enhanced, ensuring washing effectiveness while avoiding detergent waste.

[0040] The outlet of the multi-chamber independent material box is connected to the inlet of the piezoelectric ceramic micro pump through a pipeline. The outlet of the piezoelectric ceramic micro pump is connected to the inlet of the detergent pre-dissolving chamber 3. The optical liquid level monitoring component is set accordingly to the multi-chamber independent material box.

[0041] The control system is electrically connected to the piezoelectric ceramic micro-pump and the optical liquid level monitoring component to control the quantitative dispensing of detergent and monitor the remaining amount of detergent in the container.

[0042] In one embodiment, the multi-chamber independent detergent box has four independent chambers: a chamber for baby detergent, a chamber for underwear detergent, a chamber for disinfectant, and a chamber for fabric softener (optional). Each chamber is independently sealed to avoid cross-contamination between different detergents, and has a capacity of 20-50ml. The chambers are made of transparent acrylic material, with a flip-top sealing cover on the top and a silicone sealing ring on the inside of the sealing cover. The bottom of the chamber has an inclined guide surface to facilitate complete flow of detergent.

[0043] The chamber is made of transparent acrylic material, with a flip-top sealing cover on top and a silicone sealing ring on the inside of the cover. The bottom of the chamber has an inclined guide surface to facilitate complete discharge of detergent.

[0044] In one embodiment, the piezoelectric ceramic micro-pump has a minimum single dispensing volume of 0.1 ml and an accuracy error controlled within ±5%, which can achieve precise micro-dispensing of detergent. This is suitable for mini multi-tub washing machines that use less water per batch, thus avoiding detergent waste or insufficient dispensing.

[0045] In one embodiment, the optical liquid level monitoring component employs an infrared through-beam sensor, with one set of sensors corresponding to each chamber, achieving a detection accuracy of ±1ml. The sensor output is electrically connected to the signal receiver of the control system. When the remaining detergent level falls below a preset threshold, an alarm signal is sent to the control system. Upon receiving the alarm signal, the control system alerts the user via the washing machine's display panel.

[0046] In one embodiment, the detergent pre-dissolving chamber 3 is equipped with a vortex mixing device, which forms a high-speed vortex through spiral guidance, enhancing the contact and diffusion between the detergent and water, and accelerating the dissolution process; combined with the subsequent dispensing mechanism, the detergent dissolution rate can reach more than 95%.

[0047] In one embodiment, the multi-layer modular waterway structure further includes a three-way water inlet unit 10.

[0048] The inlet of the three-way water inlet unit 10 is connected to an external water source, and the outlet is connected to the inlet of the waste heat recovery circuit 1 and the inlet of the detergent pre-dissolving chamber 3, respectively. Each outlet of the three-way water inlet unit 10 is equipped with an electromagnetic flow valve. The electromagnetic flow valve model can be LD-03. The electromagnetic flow valve is electrically connected to the control system.

[0049] The three-way inlet unit 10 uses a brass valve body with an internal flow buffer chamber with a volume of 30-50ml. A Y-type filter with a filtration accuracy of 50μm is installed at the inlet of the three-way inlet unit 10, and the filter has a removable drain port.

[0050] In one embodiment, the middle layer waste heat recovery and pre-dissolution module further includes a phase change thermal storage unit 11.

[0051] The outlet of the waste heat recovery circuit 1, the phase change heat storage unit 11, and the inlet of the mixing valve 4 are connected in sequence; the phase change heat storage unit 11 uses paraffin-expanded graphite composite phase change material, the model of which can be CR-05, and the phase change temperature is 50-60℃.

[0052] In one embodiment, the phase change thermal storage unit 11 uses a paraffin-expanded graphite composite phase change material with a phase change temperature of 50-60℃ and a thermal storage density of ≥200kJ / kg. The unit is equipped with an aluminum honeycomb thermal conductive skeleton inside.

[0053] In one embodiment, the phase change thermal storage unit 11 is wrapped with a rock wool insulation layer with a thickness of 5-8 mm. A pressure relief valve is provided on the top of the unit, with a rated release pressure of 0.3 MPa. The rock wool insulation layer can reduce heat loss during the thermal storage process and improve thermal storage efficiency; the pressure relief valve can prevent abnormal pressure caused by excessive temperature inside the unit and improve safety during use.

[0054] In one embodiment, the outlets of multiple waste heat recovery loops 1 are all connected to the inlet of the manifold, and the manifold is connected to the inlet of multiple mixing valves 4 and the inlet of detergent pre-dissolving chamber 3 respectively through a diversion structure.

[0055] In one embodiment, the manifold is made of 304 stainless steel with a diameter of 25-32mm. A pressure sensor is provided at the connection between the manifold and the diversion structure. The diversion structure uses an electromagnetic diversion valve and has 5-8 diversion outlets, each of which is equipped with an independent control valve.

[0056] In one embodiment, the inner side of the manifold is polished to a roughness of ≤0.8μm, and the pipe elbows are designed with a large radius of curvature ≥3 times the pipe diameter. Polishing the inner wall reduces water flow resistance and energy consumption; the large radius elbows prevent the generation of water flow eddies, stabilize the water flow, and reduce pipe wear, thus extending service life.

[0057] In one embodiment, the waste heat recovery circuit 1 can be integrally molded from copper alloy. The waste heat recovery circuit employs a spiral groove water channel design that fits tightly against the clutch housing with a silicone heat-conducting sleeve. The inner side of the silicone heat-conducting sleeve has a protruding structure adapted to the spiral groove. The groove depth of the spiral groove water channel is 2-3mm, the spiral helix angle is 30-45°, and the inner wall of the groove is anodized (for copper alloy). The silicone heat-conducting sleeve is made of addition-cured thermally conductive silicone with a Shore hardness of 45-55 and a thermal conductivity ≥2.5W / (m²). K), the raised structure and the spiral groove adopt an interference fit, with a fit amount of 0.05-0.1mm.

[0058] Addition-cured thermally conductive silicone has good thermal conductivity and excellent flexibility, and can fit tightly to the circuit and clutch surfaces; the interference fit design ensures gapless heat transfer, improves waste heat recovery efficiency, and at the same time plays a role in buffering and shock absorption, reducing operating noise.

[0059] Example 2 This application provides a temperature control method for a multi-tub washing machine. The method is applied to the integrated water circuit system of the multi-tub washing machine, and coordinates the various water circuit components through the control system to achieve independent temperature control and efficient water supply for multiple tubs. The method specifically includes the following steps: S1; Start the sensor to detect basic data, read the washing program and self-check the status of the water circuit module.

[0060] System initialization: First, the multi-channel temperature sensor array 6, pressure sensor, flow sensor, and other detection components are activated. After completing self-test calibration, basic data is collected, including the weight of clothes in each washing tub (detected by the pressure sensor at the bottom of the washing tub), external inlet water temperature (collected by the inlet temperature sensor), initial clutch temperature (collected by the patch temperature sensor), the connectivity status of each water circuit component, and the opening and closing status of the solenoid valve. Then, the control system reads the user-set washing program (including washing type, target temperature, washing time, and other parameters) and performs status self-tests on core water circuit modules such as waste heat recovery circuit 1, heater 2, and distribution valve 5. If a component fault is detected (such as sensor malfunction, pipe blockage, or valve jamming), the control system immediately issues an alarm signal through the washing machine display panel, identifies the fault type, and prevents the system from starting. If no abnormalities are detected during the self-test, the system proceeds to the next step.

[0061] S2; Set the target temperature for each tub according to the washing program, and calculate the heat required for each tub based on the basic data.

[0062] The target temperature for each tub is set according to the washing program, and the heat required for each tub is calculated based on the weight of the clothes and the inlet water temperature collected in step S1.

[0063] S3; Based on the parameters of the washing program, predict the waste heat output and classify it. At the same time, retrieve the washing program requirements of each washing tub, establish the matching relationship between waste heat and water supply branches, and control the waste heat input of each branch by adjusting the opening of the flow valve of the waste heat recovery loop 1 to ensure that the waste heat utilization efficiency is maximized.

[0064] Waste heat output is predicted and classified based on washing program parameters (such as clutch speed, working duration, and start / stop frequency). High-temperature waste heat (T>55℃): originates from the high-power electromagnetic clutch corresponding to the disinfection washing tub, and its output... (Speed, Working Time), preferably used for preheating the inlet water for disinfection washing; Medium-temperature waste heat (35℃≤T≤55℃): from the medium-power clutches of baby wash and underwear wash processes, production capacity. (Start-stop frequency), used for regular preheating; Low-temperature waste heat (T<35℃): Collects waste heat from the system, specifically for detergent pre-dissolution; Simultaneously, the washing program requirements of each washing tub are retrieved, and a matching relationship between waste heat and water supply is established. By adjusting the opening of the flow valve of waste heat recovery circuit 1, the amount of waste heat introduced into each branch is controlled to ensure maximum waste heat utilization efficiency.

[0065] S4; Multi-tank parallel control, dynamically allocates heating power according to heat demand, and synchronously schedules detergent dispensing to achieve precise water supply and temperature control for multiple tanks in parallel.

[0066] The first step involves dynamically allocating the heating power of heater 2 based on the heat demand of each washing tub using model predictive control (MPC). Each heating channel is independently controlled, with a power adjustment step of 50W, and real-time compensation for water temperature deviations is provided. Model predictive control (MPC) is an optimization control algorithm based on future state predictions, used to dynamically adjust heating power and waste heat distribution strategies to minimize energy consumption.

[0067] The second step involves the synchronous scheduling of the miniaturized precision dispensing system 9, which uses waste heat to preheat the inlet water (35-40℃) for detergent pre-dissolution. The specific process is as follows: waste heat preheating of inlet water → pre-dissolution chamber → detergent injection by metering pump → vortex mixing (10-15 seconds) → temporary storage of pre-dissolved liquid → delivery to the mixing valve. Vortex mixing uses a spiral guide to create a high-speed vortex, enhancing the contact and diffusion between detergent and water, and improving dissolution efficiency. This mechanism ensures that the detergent is completely dissolved before entering the main water path, achieving a dissolution rate of over 95%.

[0068] The amount of detergent to be added depends on the washing program, the weight and material of the clothes. The addition process is done in three stages: the first addition is 40% of the total amount, the second addition is 30%, and the third addition is 30%, with a 10-second interval between each addition to further ensure that the detergent is fully dissolved.

[0069] At the same time, a parallel scheduling strategy is adopted: high-temperature waste heat is preferentially allocated to the disinfection washing tub with high-temperature requirements, and medium-temperature waste heat is allocated to the baby washing tub and underwear washing tub; detergent pre-dissolution is added in the order of program priority (such as disinfection washing > baby washing > underwear washing > normal washing) to ensure that the detergent in high-priority programs is fully dissolved.

[0070] The third step involves the control system opening the mixing valve 4 after the water temperature reaches the target temperature, which fully mixes the dissolved detergent solution with the heated water. Then, the control system opens the corresponding channel of the distribution valve 5 to precisely supply water to each washing tub, achieving independent temperature control and water supply for multiple tubs washing in parallel.

[0071] S5: Circulates monitoring of operating status, optimizes control parameters to meet temperature control requirements and minimize energy consumption.

[0072] Perform the following operations cyclically with a sampling period of 1 second: Temperature feedback monitoring: Compare the actual temperature of each node with the target temperature, and trigger heating power adjustment when the deviation exceeds the threshold (±0.5℃); Waste heat fluctuation handling: The heating power distribution is dynamically adjusted according to the actual waste heat output (monitored in real time by the clutch temperature sensor). If the waste heat output is higher than the predicted value, the power of the corresponding heater is reduced, and vice versa. Detergent pre-dissolution monitoring: Maintain the temperature of the dissolution chamber at 35-40℃, and monitor the dissolution effect through linkage between the liquid level sensor and the flow sensor. If the dissolution is insufficient, extend the vortex mixing time. Precise control of the distribution valve: Based on flow feedback, the valve position is adjusted to ensure a stable water flow to each washing tub and adapt to the water volume requirements of different washing programs.

[0073] S6: Energy efficiency optimization, employing Model Predictive Control (MPC) to optimize control parameters every 5 seconds. The optimization objective is to minimize total energy consumption while meeting temperature requirements. Optimization variables include the immediate heater power allocation ratio, waste heat allocation priority, and detergent pre-dissolution temperature. Constraints include temperature range limitations (target temperature ±1℃) and heater power limitations. Detergent dissolution time limit (10-15 seconds).

[0074] When sufficient waste heat recovery is detected (e.g., clutch temperature continuously exceeds 60°C), the control system reduces the power of heater 2 or even shuts down the heater, prioritizing the use of waste heat to meet temperature control requirements. If the phase change heat storage unit 11 has sufficient heat storage, the stored heat energy can be called to supplement heating, further reducing energy consumption. At the same time, the remaining detergent level is monitored in real time. When the remaining level is lower than the preset threshold, the user is reminded to replenish it. If the user does not replenish it in time, the washing load can be automatically adjusted to ensure washing effect.

[0075] S7: Anomaly Handling and Security Mechanisms. The system monitors fault status in real time during operation and executes corresponding actions for different anomalies: Overheat protection: When the temperature of the heater or water circuit node exceeds 80°C, immediately cut off the heater power supply and simultaneously open the cooling circuit; Flow anomaly detection: If the pipeline flow rate is detected to be lower than 50% of the preset threshold, it is determined to be a pipeline blockage, an alarm is immediately issued and a backflushing procedure is started to clean the pipeline impurities; Detergent low alarm: When the optical liquid level monitoring component detects that the detergent level in a certain chamber is less than 5ml, it will issue a replenishment reminder. If the user does not replenish the detergent in time, the washing load can be automatically adjusted or the system can be switched to emergency washing mode. Communication failure handling: When the control system loses communication with the sensors and actuators, it switches to the local emergency control mode to maintain basic washing functions and ensure that the user experience is not severely affected.

[0076] S8: Washing Completed and Resource Recycling. After the washing program is finished, the system performs the following operations: The heater is gradually shut down, and the remaining waste heat in the pipeline is recovered to the phase change heat storage unit 11 to store energy for the next washing preheating. Automatically flushes the detergent pre-dissolving chamber 3 and related pipelines to prevent detergent residue from clumping and affecting the next use; Record the energy consumption data of this washing cycle (including heater power consumption, waste heat recovery, and water consumption) for subsequent optimization of the control algorithm to improve the long-term energy efficiency of the system; control the closure of all valves, drain the residual liquid in the pipeline, and complete the system reset.

[0077] Application Example 1: Wall-mounted twin-tub mini washing machine.

[0078] Equipment configuration: Washing tub A: Specifically designed for infant and toddler clothing, capacity 1.2kg; Washing tub B: For underwear / silk, capacity 0.8kg; Water channel module thickness: 7.5cm; Instantaneous heater power: 400W each for both circuits.

[0079] Users can simultaneously set the washing settings for baby clothes (target temperature 40℃) and underwear (target temperature 30℃) in two separate washing tubs.

[0080] During the system initialization phase, the system detects that the weight of infant clothing is 1.0 kg and the weight of underwear is 0.6 kg, and automatically calculates the water demand as 8 L and 5 L respectively. The external water inlet temperature is 25℃ and the initial clutch temperature is 30℃. After the self-check shows no abnormalities, the system enters the waste heat prediction and classification phase. During the washing process, the clutch temperature rises. The waste heat of the clutch corresponding to tub A preheats the inlet water to 35℃, and the waste heat of the clutch corresponding to tub B preheats the inlet water to 28℃. Some of the 35℃ preheated water is diverted to the pre-dissolving chamber. In the multi-tank parallel control stage, the heat requirement of each branch is calculated using the heat requirement formula. The water circuit of tank A is heated from 35℃ to 40℃ (heating requirement ΔT=5℃), and the water circuit of tank B is heated from 28℃ to 30℃ (heating requirement ΔT=2℃). The heater power is dynamically allocated. The detergent is added according to the weight of the clothes, with 6ml of baby detergent and an appropriate amount of underwear detergent added respectively. After vortex mixing for 12 seconds, a uniform solution is formed and merged with the main water circuit at the mixing valve. The distribution valve sends the 40℃ mixture to tank A and the 30℃ mixture to tank B. During the monitoring and optimization phase, the water temperature is continuously monitored during the washing process. The temperature is kept stable within the set value ±1℃ through the synergy of waste heat and instantaneous heating. The final total heating time is 3 minutes and 20 seconds (6 minutes and 10 seconds for traditional sequential heating), the energy consumption is 0.18 kWh (0.30 kWh for traditional methods), and the detergent dissolution rate reaches 96.5%.

[0081] This solution precisely matches the washing needs of families with various types of clothing, significantly reducing energy consumption and washing waiting time, and improving the user experience.

[0082] Application Example 2: Countertop Three-Tube Sorting Washing Machine

[0083] Equipment configuration: Washing tub A: For infant and toddler clothing, capacity 1.5kg; Washing tub B: Underwear, capacity 1.0kg; Washing tub C: Sterilization wash (baby bottles, towels), capacity 0.8kg; Waterway module dimensions: 25cm × 20cm × 8cm; Total power of instant heater: 1500W.

[0084] Two users simultaneously use three washing tubs, setting them to gentle wash for wool garments (target temperature 35℃), quick wash for synthetic fiber garments (target temperature 30℃), and disinfection wash (target temperature 60℃).

[0085] During the system initialization phase, the weights of wool clothing (1 kg), synthetic fiber clothing (2 kg), and disinfected items (0.8 kg) were detected. The external water inlet temperature was 20℃, and the initial clutch temperature was 28℃. During the waste heat prediction and classification phase, the waste heat output was predicted as follows: 500W × 8min for high-temperature waste heat from the clutch in bucket C, and 300W × 10min each for medium-temperature waste heat from buckets A and B. The total heat demand was calculated to be 2184kJ. High-temperature waste heat was preferentially allocated to bucket C, medium-temperature waste heat was allocated to buckets A and B, and low-temperature waste heat was used for detergent pre-dissolution. In the multi-tank parallel control stage, 0-2 minutes: all waste heat is allocated to tank C, preheating it to 45℃; the instantaneous heater 500W is used for tank C (45→60℃), and 500W is used for tank A (20→35℃); the disinfectant in tank C is pre-dissolved; 2-5 minutes: tank C reaches 60℃, and waste heat is redistributed; the instantaneous heater 800W is used for tank A (35→40℃), and 200W is used for tank B (25→30℃); the detergent in tanks A and B is pre-dissolved; 5-8 minutes: in the temperature maintenance stage, waste heat is used for heat preservation, and the instantaneous heating power is reduced to 300W; The final actual total energy consumption is 0.28 kWh, which is 37.8% more energy-efficient than traditional sequential heating and 42% less time when multiple tanks are used in parallel. It is suitable for the simultaneous use needs of multiple users in rental scenarios, and can precisely control the temperature and detergent dosage for different types of clothing and disinfection needs, ensuring the safety of clothing washing and disinfection effect, while maximizing the use of waste heat and improving energy efficiency.

[0086] In one embodiment, the heat demand calculation and power allocation optimization in the multi-tank parallel control step are as follows: the heat demand calculation is based on the weight of the clothes to determine the water demand, and the heat demand of each branch is calculated in combination with the target washing temperature and the inlet water temperature; the power allocation can adopt a fuzzy PID algorithm, which establishes a fuzzy rule base by collecting historical temperature control data, and dynamically adjusts the adjustment step size of the heater power according to the real-time water temperature deviation and the deviation change rate. When the water temperature deviation is large (>2℃), the adjustment step size is increased to 100W to accelerate the heating speed; when the water temperature is close to the target value (≤0.5℃), the adjustment step size is decreased to 25W to ensure temperature control accuracy; the detergent dosage is determined according to the weight of the clothes and the washing program. The dosage process is carried out in three stages, with a 10-second interval between each dosage. At the same time, the impeller of the detergent pre-dissolving chamber 3 rotates to accelerate the dissolution of the detergent.

[0087] In one embodiment, the parameter optimization strategy for the monitoring and energy efficiency optimization steps is as follows: the monitoring cycle is set to 1 second, and the monitored parameters include water temperature at each node, heater power, water flow rate, detergent balance, and clutch operating temperature; an energy consumption optimization model is established with the goal of "meeting temperature control accuracy standards + minimizing energy consumption," and the matching relationship between waste heat recovery and heater power is dynamically adjusted; when sufficient waste heat recovery is detected, the heater power is reduced or even the heater is turned off to prioritize the use of waste heat; when waste heat is insufficient, the heater power is gradually increased, and the heat storage energy of the phase change heat storage unit 11 is used for supplementation; when the detergent balance is insufficient, the user is reminded to replenish it and can choose to reduce the washing load or extend the washing time to ensure the washing effect; if abnormal pipeline flow is detected, it is determined to be pipeline blockage, an alarm is immediately issued, and a backwashing procedure is initiated to clean pipeline impurities.

[0088] In one implementation, the formula for calculating the required heat is: ; in: The water requirement for each bucket, The specific heat capacity of water, For the target temperature, This refers to the inlet water temperature. The total power of heater 2 meets the following requirements: ; in: This is the maximum power of heater 2. , , These are the heating powers allocated to the corresponding heating channels of each washing tub.

[0089] In one embodiment, the water requirement mi is determined as follows: based on the weight m_clothes detected by the pressure sensor, combined with the material coefficient k (k=1.2 for cotton fabrics, k=0.8 for chemical fiber fabrics, and k=1.5 for wool fabrics), the water requirement mi is calculated using the formula mi=m_clothes×k, with a calculation accuracy of ±100ml.

[0090] Determine the water requirement based on the weight and material of the clothes to avoid using too much or too little water; different coefficients are suitable for different materials to improve the washing effect while saving water, which meets the requirements of energy conservation and environmental protection.

[0091] In one embodiment, the total power of the heater The dynamic adjustment method is as follows: Adjust according to external power grid voltage fluctuations When the voltage is lower than 90% of the rated voltage, Reduce by 20%; when sufficient heat storage is detected in phase change thermal storage unit 11, It can reduce costs by 30%-50%, prioritizing the use of stored thermal energy.

[0092] Example 3 This application also provides a washing machine, including the above-mentioned multi-tub washing machine integrated water circuit system, and using the above-mentioned multi-tub washing machine temperature control method for temperature control and water supply scheduling.

[0093] Through an integrated water circuit design where core components correspond one-to-one with washing modules, coupled with waste heat gradient utilization and intelligent temperature control scheduling, multi-dimensional technological breakthroughs are achieved. On the one hand, independent water circuits and dynamic power distribution allow for temperature control accuracy of ±1℃ in each washing tub, adapting to differentiated needs such as washing baby clothes, underwear, and disinfection washing, while parallel washing of multiple tubs significantly reduces waiting time. On the other hand, through a spiral groove-type waste heat recovery loop and a phase change heat storage unit, waste heat from the clutch is efficiently recovered and utilized in stages. Combined with model predictive control algorithms to optimize energy consumption, energy saving is achieved by more than 37.8% compared to traditional solutions. At the same time, the detergent pre-dissolving mechanism and precise dispensing system ensure a dissolution rate of over 95%, avoiding clumping and residue, thus balancing washing effect, energy efficiency, and ease of use.

[0094] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0095] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated water system for a multi-tub washing machine, characterized in that, include: Waste heat recovery circuit (1), heater (2), detergent pre-dissolving chamber (3), mixing valve (4), distribution valve (5), temperature sensor array (6) and control system; The waste heat recovery circuit (1), the heating channel of the heater (2), the liquid outlet of the detergent pre-dissolving chamber (3), the mixing valve (4) and the internal channel of the distribution valve (5) correspond one-to-one with the multiple washing modules of the multi-tub washing machine. The waste heat recovery circuit (1) is attached to the clutch of the corresponding washing module, and its outlet is connected to the corresponding mixing valve (4) through the corresponding heating channel of the heater (2); the outlet of the detergent pre-dissolving chamber (3) is connected to the corresponding mixing valve (4), and the mixing valve (4) is connected to the corresponding washing tub through the corresponding channel of the distribution valve (5). The temperature sensor array (6) is used to collect water temperature data of each node of the integrated water system and transmit it to the control system; The control system is used to control the power distribution of the heater (2) to heat the water in multiple heating channels according to the water temperature data and the preset washing program; when the water temperature is detected to be up to standard, the control distribution valve (5) is opened to open the corresponding internal channel and inject the mixture into the corresponding washing tub.

2. The integrated water system for a multi-tub washing machine according to claim 1, characterized in that, The integrated water system also includes a branch system, with each branch system corresponding to a washing module; the branch system includes an anti-backflow branch system (7) and an independent temperature control pipeline between the drums (8). The internal channel of the distribution valve (5), the corresponding anti-backflow branch system (7), the corresponding independent temperature control pipeline between the tubs (8), and the corresponding washing tub are connected in sequence.

3. The integrated water system for a multi-tub washing machine according to claim 1, characterized in that, The integrated water system also includes a miniaturized precision dispensing system (9); the miniaturized precision dispensing system (9) includes a multi-chamber independent material box, a piezoelectric ceramic micro pump and an optical liquid level monitoring component; The outlet of the multi-cavity independent material box is connected to the inlet of the piezoelectric ceramic micro pump through a pipeline. The outlet of the piezoelectric ceramic micro pump is connected to the inlet of the detergent pre-dissolving chamber (3). The optical liquid level monitoring component is set correspondingly to the multi-cavity independent material box. The control system is electrically connected to the piezoelectric ceramic micro-pump and the optical liquid level monitoring component, and is used to control the quantitative dispensing of detergent and monitor the remaining amount of detergent in the container.

4. The integrated water system for a multi-tub washing machine according to claim 1, characterized in that, The integrated water system also includes a three-way water inlet unit (10). The inlet of the three-way water inlet unit (10) is connected to an external water source, and the outlet is connected to the inlet of the waste heat recovery circuit (1) and the inlet of the detergent pre-dissolving chamber (3), respectively. Each outlet of the three-way water inlet unit (10) is equipped with an electromagnetic flow valve, which is electrically connected to the control system.

5. The integrated water system for a multi-tub washing machine according to claim 1, characterized in that, The integrated water system also includes a phase change thermal storage unit (11). The outlet of the waste heat recovery circuit (1), the phase change heat storage unit (11), and the inlet of the mixing valve (4) are connected in sequence.

6. The integrated water system for a multi-tub washing machine according to claim 1, characterized in that, The outlets of the multiple waste heat recovery circuits (1) are connected to the inlet of the manifold, and the manifold is connected to the inlet of the multiple mixing valves (4) and the inlet of the detergent pre-dissolving chamber (3) through a diversion structure.

7. The integrated water system for a multi-tub washing machine according to claim 1, characterized in that, The waste heat recovery circuit (1) adopts a spiral groove water circuit design; The waste heat recovery circuit (1) is attached to the clutch housing through a silicone heat-conducting sleeve, and the inner side of the silicone heat-conducting sleeve is provided with a protruding structure that matches the spiral groove.

8. A temperature control method for a multi-tub washing machine, characterized in that, The method, when applied to the integrated water system of a multi-tub washing machine according to any one of claims 1-7, includes the following steps: The sensor is activated to detect basic data, read the washing program, and self-check the status of the water circuit module. The target temperature for each tub is set according to the washing program, and the heat required for each tub is calculated based on the basic data. Based on the parameters of the washing program, the waste heat output is predicted and classified. At the same time, the washing program requirements of each washing tub are retrieved, and the matching relationship between waste heat and water supply is established. By adjusting the opening of the flow valve of the waste heat recovery loop (1), the waste heat input of each branch is controlled to ensure that the waste heat utilization efficiency is maximized. Multiple tanks can be controlled in parallel. The heating power is dynamically allocated according to the heat demand, and the detergent dosing is scheduled simultaneously to achieve precise water supply and temperature control in parallel for multiple tanks. The system continuously monitors the operating status and optimizes control parameters to meet temperature control requirements and minimize energy consumption.

9. The temperature control method for a multi-tub washing machine according to claim 8, characterized in that, The formula for calculating the required heat is: ； in: The water requirement for each bucket, The specific heat capacity of water, For the target temperature, This refers to the inlet water temperature. The total power of the heater (2) satisfies: ； in: The maximum power of heater (2) , , These are the heating powers allocated to the corresponding heating channels of each washing tub.

10. A washing machine, characterized in that, It includes the integrated water circuit system of a multi-tub washing machine as described in any one of claims 1-7, and uses the temperature control method of a multi-tub washing machine as described in any one of claims 8-9 for temperature control and water supply scheduling.

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