Water recycling and reusing system and method for realizing no water replenishing of locomotive and locomotive

Abstract

The invention provides a water recycling and reusing system and method for achieving water replenishing-free of a locomotive and the locomotive, and relates to the technical field of locomotives. The method comprises: a recycling water tank for receiving and storing by-product water from a hydrogen fuel cell system; the first pressurizing device is communicated with the recycling water tank and is used for pressurizing out by-product water of the recycling water tank; the compact water treatment device is communicated with an outlet of the first supercharging device and is used for performing metal ion filtration and disinfection and sterilization operation on the byproduct water pumped out by the first supercharging device; the distributed flexible water tank is communicated with an outlet of the compact water treatment device, is distributed in the internal space of the locomotive and is used for storing the filtered and sterilized water; and the secondary pressure regulating device is communicated with the outlet of the distributed flexible water tank and is used for regulating the pressure of the filtered and sterilized water and stably conveying the filtered and sterilized water to each life service water consumption point in the locomotive. The embodiment of the invention can realize that the locomotive does not need water replenishing.

Description

Technical Field

[0001] This disclosure relates to the field of locomotive technology, and more particularly to a water recycling and reuse system and method for realizing water recycling and reuse in locomotives without the need for water replenishment, as well as the locomotive itself. Background Technology

[0002] This section is intended to provide background or context for the embodiments of this disclosure as set forth in the claims. The description herein is not intended to be a prior art simply because it is included in this section.

[0003] During operation, hydrogen-powered locomotives require a continuous and essential supply of water for crew and passengers' daily needs (such as toilet flushing, handwashing, and air conditioning humidification) as well as for the vehicle's own cleaning and maintenance (such as windshield washing and body cleaning). Currently, this water supply relies on an independent domestic water tank onboard the locomotive, requiring regular replenishment at the originating station or during stops via external municipal or railway water supply facilities.

[0004] This reliance on external water replenishment leads to limited operational efficiency and increased operating costs. It also results in redundant vehicle design, increased weight, and reduced space utilization due to the installation of large-capacity water storage equipment. Furthermore, it restricts the operational flexibility of locomotives on long-distance or poorly-infrared routes, creating a systemic technical contradiction. Summary of the Invention

[0005] The purpose of this disclosure is to provide a water recycling system, method, and locomotive for achieving water recycling and reuse without external water replenishment in locomotives, thereby achieving self-sufficiency in water supply for locomotives, eliminating the need for external water replenishment, reducing operating and maintenance costs, and improving the overall space utilization and energy efficiency of the locomotive, thus overcoming the aforementioned deficiencies of the prior art.

[0006] Other features and advantages of this disclosure will become apparent from the following detailed description, or may be learned in part from practice of this disclosure.

[0007] This disclosure provides a water recycling and reuse system for locomotives that eliminates the need for water replenishment. The system includes: a recycling water tank for receiving and storing byproduct water from a hydrogen fuel cell system; a first pressurization device connected to the recycling water tank for pressurizing and pumping the byproduct water from the tank; a compact water treatment device connected to the outlet of the first pressurization device for performing metal ion filtration and disinfection on the byproduct water pumped out by the first pressurization device; distributed flexible water tanks connected to the outlet of the compact water treatment device and distributed throughout the locomotive's interior space for storing filtered and disinfected water; and a secondary pressure regulating device connected to the outlet of the distributed flexible water tanks for regulating the pressure of the filtered and disinfected water and stably delivering it to various domestic water service points within the locomotive to meet the domestic water service needs of the locomotive.

[0008] In some embodiments, the system further includes: a heat exchange device disposed on the water flow path between the recycled water tank and the first pressurization device, for cooling the by-product water flowing to the first pressurization device; or, the heat exchange device is further used to transfer heat from the by-product water to the locomotive's heat-using unit.

[0009] In some embodiments, each flexible water tank is provided with an inlet solenoid valve and a level gauge for monitoring the internal liquid level at its inlet end; wherein the inlet solenoid valve is used to connect or disconnect the water flow to the flexible water tank, and the level gauge is used to detect the water level stored in the flexible water tank.

[0010] In some embodiments, the system further includes a second pressurizing device connected to the recycling tank; wherein the second pressurizing device is configured to pump byproduct water from the recycling tank to cleaning operation units inside and outside the locomotive in response to a locomotive cleaning command.

[0011] In some embodiments, the system further includes an overflow protection module, which includes a drain valve disposed at the bottom of the recycling tank and / or the distributed flexible tank, and a control unit connected to the drain valve; the control unit is configured to: when the liquid level of any distributed flexible tank is detected to exceed the safety limit, open the drain valve of the corresponding flexible tank to release the liquid until the liquid level returns to normal.

[0012] This application provides a water recycling and reuse method for locomotives to achieve water recycling without replenishment, applied to a water recycling and reuse system, comprising: when receiving a water replenishment request from a residential water service point, comparing the liquid level of the flexible water tank corresponding to the residential water service point with a first preset threshold; when the liquid level of the flexible water tank corresponding to the residential water service point is greater than the first preset threshold, replenishing the residential water service point with water through a secondary pressure regulating device in the water recycling and reuse system; when the liquid level of the flexible water tank corresponding to the residential water service point is less than or equal to the first preset threshold, performing a water replenishment method on the flexible water tank corresponding to the residential water service point.

[0013] In some embodiments, a water replenishment method is performed on the flexible water tank corresponding to the water service point, including: confirming that the liquid level of the recycling tank of the water recycling system is higher than a second preset threshold; opening the inlet solenoid valve of the flexible water tank corresponding to the water service point and activating the first pressurization device of the water recycling system to replenish the flexible water tank corresponding to the water service point with water from the recycling tank; when the liquid level of the flexible water tank corresponding to the water service point is detected by the level gauge to reach a third preset threshold, closing the inlet solenoid valve of the flexible water tank corresponding to the water service point, wherein the third preset threshold is greater than the first preset threshold.

[0014] In some embodiments, the method further includes: shutting off the first booster device when all inlet solenoid valves of the flexible water tanks in the water recycling system are closed.

[0015] In some embodiments, the method further includes: receiving a locomotive cleaning instruction from a cleaning operation unit; In response to the locomotive cleaning command, and after confirming that the liquid level in the recycling water tank meets the requirements, the second pressurization device of the water recycling system is activated to supply water to the cleaning operation unit.

[0016] This application provides a locomotive that includes the water recycling and reuse system described in any one of the above claims.

[0017] This disclosure provides an electronic device comprising: a memory and a processor; the memory for storing computer program instructions; the processor for calling the computer program instructions stored in the memory to implement the water recycling and reuse method for realizing locomotive water replenishment-free operation as described above.

[0018] This disclosure provides a computer-readable storage medium storing computer program instructions to implement the water recycling and reuse method for locomotives without water replenishment as described in any of the preceding embodiments.

[0019] This disclosure provides a computer program product or computer program that includes computer program instructions stored in a computer-readable storage medium. The computer program instructions are read from the computer-readable storage medium, and the processor executes the computer program instructions to implement the aforementioned method for achieving water recycling and reuse without water replenishment in locomotives.

[0020] This disclosure provides a water recycling system and method for achieving water-free locomotive operation, as well as the locomotive itself. The system collects and temporarily stores fuel cell byproduct water in a recycling tank, uses a first pressurization device for power transmission, and then performs metal ion filtration and ultraviolet disinfection via a compact water treatment device, effectively ensuring water quality safety. The purified water is dispersed and stored in the locomotive's fragmented spaces through a distributed flexible water tank system, significantly improving space utilization and enabling local water storage. Finally, a two-stage pressure regulating device stably adapts to the pressure demands of different water usage points, thereby achieving a continuous and reliable supply of domestic service water (such as for toilets, air conditioning humidification, etc.). This system transforms the originally directly discharged byproduct water into directly usable domestic water resources, eliminating the traditional locomotive's dependence on external water replenishment at the source. This achieves water-free operation while reducing operating and maintenance costs and improving the overall space utilization of the vehicle.

[0021] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this disclosure. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0023] Figure 1 This is a schematic diagram illustrating a water recycling and reuse system for locomotives that eliminates the need for water replenishment, according to an exemplary embodiment.

[0024] Figure 2 This is an exemplary embodiment illustrating a method for water recycling and reuse in locomotives without the need for additional water supply.

[0025] Figure 3 This is a flowchart illustrating a locomotive cleaning method according to an exemplary embodiment.

[0026] Figure 4 This is a flowchart illustrating a locomotive cleaning method according to an exemplary embodiment.

[0027] Figure 5 This is a flowchart illustrating a method for controlling clean water usage for locomotive interior living services, according to an exemplary embodiment.

[0028] Figure 6 A schematic diagram of the structure of an electronic device suitable for implementing embodiments of the present disclosure is shown. Detailed Implementation

[0029] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0030] Those skilled in the art will recognize that embodiments of this disclosure can be a system, apparatus, device, method, or computer program product. Therefore, this disclosure can be implemented in the following forms: entirely hardware, entirely software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

[0031] The features, structures, or characteristics described in this disclosure can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced with one or more specific details omitted, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0032] In this disclosure, the terms "module" or "unit" refer to a computer program or part of a computer program that has a predetermined function and works with other related parts to achieve a predetermined goal, and can be implemented wholly or partially using software, hardware (such as processing circuitry or memory), or a combination thereof. Similarly, a processor (or multiple processors or memory) can be used to implement one or more modules or units. Furthermore, each module or unit can be part of an overall module or unit that includes the functionality of that module or unit.

[0033] The accompanying drawings are merely illustrative of this disclosure, and the same reference numerals in the drawings denote the same or similar parts, thus omitting repeated descriptions of them. Some block diagrams shown in the drawings do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0034] The flowchart shown in the accompanying drawings is merely illustrative and does not necessarily include all content and steps, nor does it require execution in the described order. For example, some steps may be broken down, while others may be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0035] In the description of this disclosure, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, "at least one" means one or more, and "multiple" means two or more. The terms "first," "second," etc., do not limit the quantity or order of execution, and "first," "second," etc., do not necessarily imply differences; the terms "contains," "includes," and "has" are used to indicate an open-ended meaning of inclusion and refer to the existence of additional elements / components / etc. besides those listed.

[0036] To better understand the above-mentioned objectives, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0037] This application relates to the field of hydrogen energy locomotive technology. Hydrogen energy has attracted much attention as a clean and efficient energy carrier. As the main power source, the hydrogen fuel cell system for rail transit generates a large amount of water and heat as byproducts during operation. If the water is directly discharged, it will not only waste water resources but may also have a certain impact on the locomotive's operating environment.

[0038] The main byproduct of hydrogen fuel cell systems is deionized water, and the exhaust gas produced after the electrochemical reaction contains water vapor, unreacted hydrogen, and air. To address these issues, this application first passes the exhaust gas through a vapor-water separator. The separated liquid water then undergoes a series of recovery, filtration, purification, monitoring, storage, and reuse processes, and is recycled along with some waste heat to supply water for domestic services (such as washing and humidification) inside the hydrogen-powered locomotive and for external cleaning operations (such as windshield washing and vehicle cleaning). This method reduces the number and volume of independent water tanks required for the locomotive, fundamentally eliminating the need for water replenishment and lowering the operating and maintenance costs of the hydrogen-powered locomotive.

[0039] The exemplary embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0040] Figure 1 This is a schematic diagram illustrating a water recycling and reuse system for locomotives that eliminates the need for water replenishment, according to an exemplary embodiment.

[0041] refer to Figure 1 The water recycling system provided in this application may include the following components.

[0042] The system includes a recycling water tank 101, a first pressurization device 105, a compact water treatment device 106, a distributed flexible water tank 107, and a secondary pressure regulating device 108.

[0043] The recycling tank 101 can be used to receive and store byproduct water from the hydrogen fuel cell system.

[0044] In some embodiments, the byproducts generated by the hydrogen fuel cell system 102 can be separated into steam and water by the exhaust steam-water separator 103, then filtered by the particulate filter 104, and finally stored in the recycling tank 101.

[0045] In some embodiments, the recycling tank can store coarsely filtered byproduct water.

[0046] In some embodiments, the first pressurizing device 105 (M1) can be connected to a recycling tank to pressurize and pump out the by-product water from the recycling tank.

[0047] In some embodiments, the compact water treatment device 106 may be connected to the outlet of the first booster device for performing metal ion filtration and disinfection operations on the by-product water pumped out by the first booster device.

[0048] In some embodiments, the compact water treatment device may include a metal ion filter and a UV (Ultraviolet) sterilization filter.

[0049] In some embodiments, the metal ion filter and the UV sterilization filter can be compactly deployed together to form the aforementioned compact water treatment device 106.

[0050] In some embodiments, the distributed flexible water tank 107 can be connected to the outlet of a compact water treatment device and distributed within the locomotive interior space to store filtered and sterilized water.

[0051] In some embodiments, a flexible water tank can be a foldable, shape-adjustable water storage container made of flexible composite materials such as high-strength coated fabrics, food-grade rubber, or polymer films.

[0052] In locomotive deployment, flexible water tanks can be custom-designed and fitted into irregular or fragmented non-load-bearing spaces within the locomotive body, such as under seats, in equipment compartment gaps, in roof cavities, or in corridor sidewalls. This distributed arrangement allows for modular expansion of water storage capacity without modifying the locomotive's main structure, maximizing water storage volume within limited space. Simultaneously, by acting as a secondary buffer tank near the water consumption terminal, it helps stabilize local water pressure and optimize water supply response speed.

[0053] In some embodiments, the secondary pressure regulating device 108 can be connected to the outlet of the distributed flexible water tank to regulate the pressure of the filtered and sterilized water and stably deliver it to various domestic water service points inside the locomotive to meet the domestic water service needs inside the locomotive.

[0054] In some embodiments, the secondary pressure regulating device is a pressure regulating device installed between the outlet of the distributed flexible water tank and the final water usage point. Its core function is to precisely regulate and stabilize the water flow pressure from the flexible water tank to adapt to the differentiated water pressure requirements of different domestic service water points (such as toilet flush valves, washbasin faucets, air conditioner humidifiers, etc.). This device can buffer the pipeline pressure fluctuations caused by the simultaneous operation of multiple water points or the start and stop of water pumps, ensuring continuous and stable water supply to the terminal while meeting the requirements of user comfort and equipment safety. It is a key link in realizing the transition from distributed water storage to reliable water supply.

[0055] In some embodiments, the first booster and the second-level pressure regulator perform different levels of pressure management functions in the system: the first booster acts as the system's main pump, responsible for extracting water from the recycling tank and providing the basic delivery pressure to overcome pipeline resistance, pushing the water to the purification unit and distributed water tanks; while the second-level pressure regulator acts as a terminal pressure adapter, installed at the starting point of each water branch, responsible for secondary fine adjustment and stabilization of the water flow from the flexible water tank, to match the differentiated water pressure requirements of different water-using devices (such as toilets, faucets, and humidifiers) and eliminate pressure fluctuations. Together, they form a collaborative pressure management system of "centralized booster delivery and distributed fine pressure regulation."

[0056] In some embodiments, water service points refer to various terminal water facilities installed on hydrogen-powered locomotives to ensure the basic living and hygiene needs of crew members and passengers. These mainly include toilet flushing systems, handwashing sinks, shower facilities (if available), dining car washing sinks, and humidification units of air conditioning or air conditioning systems. These water service points have specific requirements for water quality, water pressure, and water supply reliability, and are core functional nodes for ensuring the comfort and hygiene of personnel inside the locomotive. This system enables these nodes to become self-sufficient by stably supplying standard-compliant recycled and purified water, thus eliminating their dependence on external water replenishment.

[0057] In some embodiments, the water recycling system described above may further include a heat exchange device.

[0058] In some embodiments, the heat exchange device described above may be disposed on the water flow path between the recycling water tank and the first pressurization device, for cooling the by-product water flowing to the first pressurization device.

[0059] In some embodiments, the heat exchange device described above may be placed before the inlet of the recycling water tank, after the outlet, or inside the recycling water tank; this application does not impose any restrictions on this.

[0060] In some embodiments, the heat exchange device is also used to transfer heat from the by-product water to the locomotive's heat-using unit.

[0061] like Figure 1 As shown, the heat in the water, a byproduct of hydrogen fuel cells, can be transferred to each heat-using unit in a timely manner through a heat exchange device.

[0062] In some embodiments, the aforementioned heat-using unit may refer to a functional subsystem inside the locomotive that can effectively utilize the waste heat (60-70°C) carried by fuel cell by-product water. It may include: an environmental control system that provides auxiliary heating for the driver's cab and passenger compartment, a heating pipeline for preheating domestic water, a thermal management module that provides insulation for the traction battery in low-temperature environments, and an auxiliary device that provides a regenerative heat source for equipment such as air dryers.

[0063] This embodiment recovers waste heat to these units, enabling the system to achieve water resource recycling while further improving the overall energy utilization efficiency and operational economy of the vehicle.

[0064] In some embodiments, each flexible water tank may be equipped with an inlet solenoid valve and a level gauge for monitoring the internal liquid level at its inlet end; wherein the inlet solenoid valve is used to connect or disconnect the water flow to the flexible water tank, and the level gauge is used to detect the water level stored in the flexible water tank.

[0065] In some embodiments, the water recycling system described above may further include a second booster device (such as...). Figure 1 109 in the middle).

[0066] In some embodiments, the second pressurization device described above may be connected to a recycling water tank.

[0067] In some embodiments, the second pressurization device may be configured to pump byproduct water from the recycling tank to the cleaning operation unit inside and outside the locomotive in response to a locomotive cleaning command.

[0068] In some embodiments, the aforementioned cleaning operation unit may refer to a terminal device that relies on water as a medium to perform cleaning, dust removal, or cooling functions inside and outside the locomotive.

[0069] In some embodiments, the cleaning unit may include: wide-angle atomizing dust suppression nozzles installed on the front and sides of the vehicle (for spraying water mist to suppress dust when traversing sand and dust areas), a windshield washer nozzle system located in the driver's cabin, high-pressure spray arms or nozzles for automatic or manual cleaning of the vehicle's exterior surfaces, and equipment cleaning nozzles for cooling and rinsing components such as bogies and brakes. These units can directly obtain by-product water from the recycled water tank through a second pressurization device, achieving cleaning, dust suppression, and cooling functions for the external environment and vehicle body components.

[0070] In some embodiments, the water recycling system may also include an overflow protection module.

[0071] In some embodiments, the overflow protection module may include a drain valve disposed at the bottom of a recycling tank and / or a distributed flexible tank, and a control unit connected to the drain valve.

[0072] In some embodiments, the control unit can be configured to: when the liquid level of any distributed flexible water tank is detected to exceed the safety limit, open the drain valve of the corresponding flexible water tank to release the liquid until the liquid level returns to normal.

[0073] The above-mentioned water recycling and reuse system has at least the following advantages.

[0074] 1. Fuel cell vehicles do not require additional water for daily life services, thus avoiding the need for traditional water tank replenishment.

[0075] 2. Compact water treatment equipment (integrated filter and miniaturized ultraviolet sterilizer) ensures that the water quality meets the national standards for domestic service water.

[0076] 3. The byproduct water generated by the hydrogen fuel cell system can be used for domestic service water (air conditioning humidification water, toilet water) after disinfection and purification treatment.

[0077] 4. Water, a byproduct of the hydrogen fuel cell system, can be reused for cleaning the exterior, front, and body of the vehicle, and can also be used directly for cleaning the windshield of the locomotive cab (nozzles are designed to prevent clogging and are automatically cleaned periodically).

[0078] 5. When hydrogen-powered freight locomotives pass through dusty or sandy areas, they use water atomization byproducts to spray in a wide-angle manner to suppress dust diffusion (wide-angle spraying + remote start-stop control).

[0079] 6. The byproduct water of the hydrogen fuel cell system is at a temperature of 60℃-70℃. By recovering and reusing part of the waste heat, it can provide the necessary heat source for the personnel working in the vehicle in low-temperature environments.

[0080] The aforementioned water recycling and reuse system integrates recycling, filtration and purification, disinfection, distributed storage and pressure adaptation to convert hydrogen fuel cell by-product water into a stable water source that meets standards. This water is used for both internal locomotive living services (such as toilets and air conditioning humidification) and external cleaning and dust suppression. It completely eliminates the need for external water replenishment and reduces the configuration of traditional water tanks. It also enables the effective recovery and utilization of waste heat from by-products, thereby significantly improving the water self-sufficiency, operating economy and space utilization efficiency of hydrogen fuel cell locomotives.

[0081] In some embodiments, the water recycling and reuse system for achieving locomotive water replenishment-free operation may further include a control unit, which can implement the following water recycling and reuse methods for achieving locomotive water replenishment-free operation (including at least...). Figures 2-4 (Method).

[0082] Figure 2 This is an exemplary embodiment illustrating a method for water recycling and reuse in locomotives without the need for additional water supply.

[0083] The above-mentioned method for achieving water recycling and reuse without the need for locomotive water replenishment can be applied to water recycling and reuse systems.

[0084] The aforementioned locomotives may be, for example, passenger locomotives, freight locomotives, EMUs, shunting locomotives, and trams, etc., and this application does not limit them.

[0085] refer to Figure 2 The above-mentioned method for realizing water recycling and reuse without water replenishment in locomotives may include the following steps.

[0086] Step S202: When a water replenishment request is received from a domestic water service point, the liquid level of the flexible water tank corresponding to the domestic water service point is compared with the first preset threshold.

[0087] "Flexible water tanks corresponding to domestic water service points" can refer to distributed flexible water storage containers that are directly connected to specific domestic water service facilities (such as toilets, handwashing sinks, air conditioning humidifiers, etc.) inside the locomotive and connected through independent pipelines. These water tanks are specifically used to store purified byproduct water and provide nearby, stable, and controllable water supply to their corresponding water service points.

[0088] In some embodiments, the water supply points for domestic services can refer to the terminal water supply locations on the hydrogen-powered locomotive that provide basic living and sanitation services to crew members and passengers. These mainly include: toilet flushing systems, handwashing sinks, shower facilities (if available), dining car washing sinks, and humidification units of air conditioning or air conditioning systems. These points have specific requirements for water quality, water pressure, and stability, and are the main supply targets for the purified and pressure-regulated recycled water in this method. Their stable operation is directly related to the comfort and hygiene level of the locomotive's internal environment.

[0089] Step S204: When the liquid level of the flexible water tank corresponding to the domestic water service point is greater than the first preset threshold, water is replenished to the domestic water service point through the secondary pressure regulating device in the water recycling system.

[0090] Step S206: When the liquid level of the flexible water tank corresponding to the domestic water service point is less than or equal to the first preset threshold, a water replenishment method is performed on the flexible water tank corresponding to the domestic water service point.

[0091] This application applies to all types of rail transit passenger vehicles powered by hydrogen fuel cells, especially locomotives, EMUs, and trams with limited interior space and water needs for domestic services (such as toilets, air conditioning humidification, etc.). By recycling the by-product water generated by fuel cells, and through purification, distributed storage, and pressure regulation supply, self-sufficiency in domestic water and efficient use of space can be achieved.

[0092] Figure 3 This is a flowchart illustrating a flexible water tank replenishment method according to an exemplary embodiment.

[0093] refer to Figure 3 The above-mentioned flexible water tank replenishment method may include the following steps.

[0094] Step S302: Confirm that the liquid level in the recycling tank of the water recycling system is higher than the second preset threshold.

[0095] Step S304: Open the inlet solenoid valve of the flexible water tank corresponding to the domestic water service point, and start the first pressurization device of the water recycling and reuse system to replenish the flexible water tank corresponding to the domestic water service point with water from the recycled water tank.

[0096] Step S306: When the liquid level of the flexible water tank corresponding to the domestic water service point is detected by the liquid level gauge to reach the third preset threshold, the inlet solenoid valve of the flexible water tank corresponding to the domestic water service point is closed, wherein the third preset threshold is greater than the first preset threshold.

[0097] In some embodiments, the first booster device is shut down when all inlet solenoid valves of the flexible water tanks in the water recycling system are closed.

[0098] This flexible water tank replenishment method achieves precise and automatic replenishment of water to each dispersed water tank through preset liquid level threshold and coordinated control of solenoid valves. Under the premise of ensuring sufficient water supply, the booster device can be started and stopped as needed, which can avoid redundant water supply and energy waste, and ensure stable and independent water supply to each water point, thereby improving the control accuracy and operational efficiency of the entire water recycling system.

[0099] Figure 4This is a flowchart illustrating a locomotive cleaning method according to an exemplary embodiment.

[0100] refer to Figure 4 The above locomotive cleaning method may include the following steps.

[0101] Step S402: Receive a locomotive cleaning instruction from the cleaning operation unit.

[0102] In step S404, in response to the locomotive cleaning command and after confirming that the liquid level in the recycling water tank meets the requirements, the second pressurization device of the water recycling system is activated to supply water to the cleaning operation unit.

[0103] This locomotive cleaning method receives cleaning instructions and automatically activates a dedicated pressurization device to supply water to the external cleaning unit by detecting the liquid level in the recovery water tank. This enables on-demand and rapid response for external locomotive cleaning (such as dust suppression and glass cleaning). While ensuring cleaning effectiveness, it avoids ineffective water consumption and system malfunctions, and improves the utilization efficiency of by-product water in external cleaning scenarios and the level of system intelligence.

[0104] In some embodiments, this application also provides a locomotive that may include a water recycling and reuse system for achieving water recycling without the need for additional water supply to the locomotive.

[0105] In some embodiments, the water recycling and reuse system for achieving locomotive-free water replenishment may include: a recycling water tank for receiving and storing byproduct water from the hydrogen fuel cell system; a first booster device connected to the recycling water tank for boosting and pumping out the byproduct water from the recycling water tank; a compact water treatment device connected to the outlet of the first booster device for performing metal ion filtration and disinfection on the byproduct water pumped out by the first booster device; distributed flexible water tanks connected to the outlet of the compact water treatment device and distributedly deployed in the locomotive interior space for storing filtered and disinfected water; and a secondary pressure regulating device connected to the outlet of the distributed flexible water tanks for regulating the pressure of the filtered and disinfected water and stably delivering it to various domestic water service points inside the locomotive to meet the domestic water service needs of the locomotive.

[0106] In some embodiments, the water recycling and reuse system for realizing locomotive water-free operation may further include a heat exchange device, which may be disposed in the water flow path between the recycling water tank and the first pressurization device, for cooling the by-product water flowing to the first pressurization device; or, the heat exchange device may also be used to transfer the heat in the by-product water to the heat-using unit of the locomotive.

[0107] In some embodiments, each flexible water tank is provided with an inlet solenoid valve and a level gauge for monitoring the internal liquid level at its inlet end; wherein the inlet solenoid valve is used to connect or disconnect the water flow to the flexible water tank, and the level gauge is used to detect the water level stored in the flexible water tank.

[0108] In some embodiments, the water recycling and reuse system for achieving locomotive water-free operation may further include: a second pressurization device connected to the recycling and reuse water tank; wherein the second pressurization device is configured to pump by-product water from the recycling and reuse water tank to cleaning operation units inside and outside the locomotive in response to a locomotive cleaning command.

[0109] In some embodiments, the water recycling and reuse system for realizing locomotive water-free operation may include an overflow protection module, which includes a drain valve disposed at the bottom of the recycling water tank and / or the distributed flexible water tank, and a control unit connected to the drain valve; the control unit is configured to: when the liquid level of any distributed flexible water tank is detected to exceed the safety limit, open the drain valve of the corresponding flexible water tank to release the water until the liquid level returns to normal.

[0110] In some embodiments, the water recycling and reuse system for realizing locomotive water recycling without replenishment may further include a control unit, which can implement the following water recycling and reuse method for realizing locomotive water recycling without replenishment.

[0111] The water recycling and reuse method may include the following steps: when a water replenishment request is received from a residential water service point, the liquid level of the flexible water tank corresponding to the residential water service point is compared with a first preset threshold; when the liquid level of the flexible water tank corresponding to the residential water service point is greater than the first preset threshold, water is replenished to the residential water service point through a secondary pressure regulating device in the water recycling and reuse system; when the liquid level of the flexible water tank corresponding to the residential water service point is less than or equal to the first preset threshold, the water replenishment method is executed for the flexible water tank corresponding to the residential water service point.

[0112] In some embodiments, a water replenishment method is performed on the flexible water tank corresponding to a water service point, including: confirming that the liquid level of the recycling tank of the water recycling system is higher than a second preset threshold; opening the inlet solenoid valve of the flexible water tank corresponding to the water service point and activating the first pressurization device of the water recycling system to replenish the flexible water tank corresponding to the water service point with water from the recycling tank; and closing the inlet solenoid valve of the flexible water tank corresponding to the water service point when the liquid level value of the flexible water tank corresponding to the water service point is detected by the level gauge to reach a third preset threshold, wherein the third preset threshold is greater than the first preset threshold.

[0113] In some embodiments, the above-described water recycling method may further include: shutting off the first booster device when all inlet solenoid valves of the flexible water tanks in the water recycling system are closed.

[0114] In some embodiments, the above-described water recycling and reuse method may further include: receiving a locomotive cleaning instruction from a cleaning operation unit; responding to the locomotive cleaning instruction and, after confirming that the liquid level in the recycling water tank meets the requirements, activating a second pressurization device of the water recycling and reuse system to supply water to the cleaning operation unit.

[0115] This application proposes a system for recycling and reusing byproduct water from a fuel cell system used in hydrogen-powered rail transit locomotives (i.e., a water recycling and reuse system for achieving locomotive water replenishment-free operation). Reference Figure 1 The system may include a particulate filter 104, a recycling tank 101, a booster device 105, a three-way valve, a distributed flexible tank 107, a level gauge, a breather valve, and a compact water treatment device 106 (metal ion filtration and UV sterilization).

[0116] In some embodiments, the by-product water can be recycled and reused through the above system as cleaning water for locomotive interior living services, and as water supply for wide-angle dust suppression atomizing nozzles or windshield cleaning on the locomotive exterior. This is to meet the water replenishment needs for interior living services and exterior cleaning operations of hydrogen-powered locomotives.

[0117] Based on the above system, this application proposes a method for recycling and reusing water by-products of a fuel cell system for hydrogen-powered rail transit locomotives (i.e., a water recycling and reuse method for achieving locomotives without the need for water replenishment).

[0118] In some embodiments, the exhaust gas from the electrochemical reaction of a hydrogen fuel cell system contains a small amount of unreacted hydrogen, a large amount of water vapor, and some residual heat. The exhaust gas from the fuel cell system is then processed by a gas-water separator (e.g., Figure 1 In the tail gas-water separator 103, unreacted hydrogen gas is discharged into the outside air as the locomotive runs, while a large amount of liquid water (60℃-70℃) passes through a particulate filter (such as...). Figure 1 104) enters the recycling tank (e.g.) Figure 1 (101 in the middle), the cooling water temperature is reduced to about 20℃-30℃ through the heat exchange device, and then passed through the pressurization device (such as Figure 1 105) is used for water supply operations for internal living services and external cleaning operations of hydrogen-powered locomotives.

[0119] In some embodiments, a recyclable water tank (such as...) can be used. Figure 1 Water from 101) is pumped through a booster to a compact water treatment unit (such as...). Figure 1(106 in the middle), the by-product water, after being filtered by metal ions and disinfected by UV, is transported to flexible water tanks distributed throughout the locomotive (such as...). Figure 1 Within 107, the distributed flexible water tank maintains a certain pressure through a level gauge and a breather valve, and then utilizes a secondary pressure regulating device (such as...) Figure 1 (108) Adjust the pressure to meet the water demand for domestic services inside the locomotive, in order to meet the water demand of existing hydrogen-powered locomotives for toilets, air conditioning humidification and water replenishment.

[0120] In some embodiments, for locomotive exterior cleaning operations, the deionized water in the recycled water tank can be directly applied to various exterior cleaning operations, such as locomotive dust suppression atomization, locomotive windshield cleaning, and locomotive exterior cleaning, according to actual application needs, through a pressurization device.

[0121] The following section describes the process for controlling clean water usage for living services inside hydrogen-powered locomotives.

[0122] The following explanation will use the example of replenishing water in a toilet tank when the water level is low. Those skilled in the art can extend the water control method for other domestic water points based on this application.

[0123] Figure 5 This is a flowchart illustrating a method for controlling clean water usage for locomotive interior living services, according to an exemplary embodiment.

[0124] refer to Figure 5 The above method may include the following steps.

[0125] Step S502: Receive a water replenishment command for low water level in the bathroom water tank.

[0126] Step S504: Confirm that the liquid level L0 in the recycling tank is within the normal range.

[0127] Step S506: Obtain the corresponding distributed water tank level Lx value (x=1,2,3……x) of the distributed water tank level gauge Lx and the inlet solenoid valve Kx.

[0128] Step S508: Determine if the liquid level in the distributed water tank Lx ≤ LxL?

[0129] If the distributed water tank level Lx ≤ LxL, then proceed to steps S510 to S514; if the distributed water tank level Lx > LxL, then proceed to steps S516 to S520. Here, LxL is a preset level value greater than 0.

[0130] In step S510, the solenoid valve Kx at the inlet of the distributed water tank is opened (x=1,2,3…n), the booster device M1 is started, and purified water is supplied to the distributed flexible water tank through the purification device.

[0131] Step S512, determine whether the liquid level gauge Lx corresponding to Kx ≥ LxH?

[0132] If the liquid level gauge Lx corresponding to Kx ≥ LxH, then execute step S514; when the liquid level gauge Lx corresponding to Kx < LxH, loop and execute step S516 and subsequent steps. Where LxH > LxL and LxH is an integer greater than 0.

[0133] Step S514, the solenoid valve Kx at the inlet of the distributed water tank is closed. When all Kx are in the closed state, the pressurization device M1 is closed and standby.

[0134] Step S516, the secondary pressure regulating device is started, adjusted to the required pressure P1 and continuously supply water to the water tank.

[0135] Step S518, determine whether the toilet water tank needs to be refilled?

[0136] If the toilet water tank needs to be refilled, loop and execute step S502 and subsequent steps; if the toilet water tank does not need to be refilled, then execute step S520.

[0137] Step S520, the secondary pressure regulating device is closed and standby.

[0138] In the above embodiment, taking the toilet water tank with low liquid level for water replenishment as an example, when receiving the instruction for water replenishment with low liquid level in the toilet water tank, it will first confirm whether the liquid level LO of the recycling water tank is within the normal range.

[0139] In some embodiments, a plurality of distributed flexible water tanks are arranged on the hydrogen energy locomotive, and each water tank inlet end is equipped with a solenoid valve and a liquid level gauge, which can detect the liquid level of the distributed flexible water tank in real time.

[0140] In some embodiments, the liquid level gauge Lx of the distributed flexible water tank corresponds to the inlet solenoid valve Kx. When the distributed flexible water tank monitors that the liquid level value Lx > LxL, the secondary pressure regulating device is started, adjusted according to the pressure requirement of the toilet water tank and continuously supply water to the water tank until the toilet water tank does not need to be refilled, and the secondary pressure regulating device is closed and standby. x represents the label of the flexible water tank, and x is an integer greater than 0. [[ID=3]]

[0141] When the distributed flexible water tank monitors that the liquid level value Lx ≤ LxL, the solenoid valve Kx at the inlet of the distributed flexible water tank is opened (x = 1, 2, 3…n), the pressurization device M1 is started, and after passing through the metal ion filtration and UV sterilization and disinfection of the compact water treatment device, purified water after purification and sterilization is supplied to the distributed flexible water tank. When the liquid level gauge Lx corresponding to Kx ≥ LxH, the solenoid valve Kx at the inlet of the distributed flexible water tank is closed.

[0142] In some embodiments, when all solenoid valves Kx at the inlets of the distributed flexible water tanks are closed, the pressurization device M1 is shut down and in standby mode, while continuing to monitor the liquid level Lx of the distributed flexible water tanks. Similarly, the control process for replenishing water for air conditioning humidification or other reserved clean water in the hydrogen-powered locomotive is as described above.

[0143] In some embodiments, the water control process for external cleaning of hydrogen-powered locomotives can meet the needs of cleaning the locomotive windshield, cooling and cleaning locomotive components, and external atomization to suppress dust. When the locomotive travels through a dusty environment, wide-angle water mist spraying can suppress dust diffusion and reduce the impact on the surrounding environment, locomotive components, and drivers and passengers.

[0144] In some embodiments, the water control process for external cleaning operations of hydrogen-powered locomotives may include the following steps. When the locomotive requires external cleaning, once the liquid level L0 in the recycled water tank is confirmed to be at the usable water demand value, the byproduct deionized water is directly pumped to the water-using end via the booster device M2 to meet the external water demand of the hydrogen-powered locomotive for windshield cleaning, locomotive cooling and cleaning, or dust suppression. When the liquid level in the recycled water tank and the distributed water tank reaches its maximum, i.e., when the byproduct water production is excessive, the bottom drain valve opens to discharge the water into the hydrogen-powered locomotive's sewage tank or other public drain outlets, ensuring that the liquid level gauge L0 value in the recycled water tank remains within a reasonable range. Similarly, the control process for the public drain pipeline and drain valve K4 of the distributed flexible water tank is as described above.

[0145] The above embodiments can achieve at least the following technical effects.

[0146] 1. Water usage for daily life services (air conditioning humidification water, toilet water) of hydrogen-powered locomotives can be made waterless, reducing operation and maintenance costs.

[0147] 2. Reuse of fuel cell byproduct water for cleaning the exterior of the vehicle, the front of the vehicle, and the windshield, which is low-carbon and environmentally friendly.

[0148] 3. When locomotives (such as freight locomotives) pass through dusty environments, water mist spraying can suppress dust diffusion and reduce the impact on the surrounding environment, locomotive components, and drivers and passengers.

[0149] 4. Hydrogen-powered locomotives can flexibly deploy distributed flexible water tanks to make full use of fragmented space on the locomotive and improve space utilization.

[0150] 5. The fuel cell byproduct water is equipped with a compact water treatment system (integrated metal ion filter and miniaturized ultraviolet sterilization) to ensure that the water quality meets the national standards for domestic service water.

[0151] It should be particularly noted that the steps in the various embodiments of the above-described method for realizing water recycling and reuse without locomotive water replenishment can be interchanged, substituted, added, or deleted. Therefore, these reasonable permutations and combinations of the water recycling and reuse method for realizing water recycling and reuse without locomotive water replenishment should also fall within the protection scope of this disclosure, and the protection scope of this disclosure should not be limited to the embodiments.

[0152] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in a flowchart or block diagram may represent a portion of a module or program segment containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer program instructions.

[0153] Furthermore, the above figures are merely illustrative of the processes included in the method according to exemplary embodiments of this disclosure and are not intended to be limiting. It is readily understood that the processes shown in the above figures do not indicate or limit the temporal order of these processes. Additionally, it is readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.

[0154] Figure 6 A schematic diagram of an electronic device suitable for implementing embodiments of the present disclosure is shown. It should be noted that... Figure 6 The electronic device 600 shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments disclosed herein.

[0155] like Figure 6 As shown, the electronic device 600 includes a central processing unit (CPU) 601, which can perform various appropriate actions and processes based on a program stored in a read-only memory (ROM) 602 or a program loaded from a storage section 608 into a random access memory (RAM) 603. The RAM 603 also stores various programs and data required for the operation of the electronic device 600. The CPU 601, ROM 602, and RAM 603 are interconnected via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0156] The following components are connected to I / O interface 605: an input section 606 including a keyboard, mouse, etc.; an output section 607 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 608 including a hard disk, etc.; and a communication section 609 including a network interface card such as a LAN card, modem, etc. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to I / O interface 605 as needed. A removable medium 611, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on drive 610 as needed so that computer programs read from it can be installed into storage section 608 as needed.

[0157] In particular, according to embodiments of this disclosure, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this disclosure include a computer program product comprising a computer program carried on a computer-readable storage medium, the computer program containing computer program instructions for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 609, and / or installed from removable medium 611. When the computer program is executed by central processing unit (CPU) 601, it performs the functions defined above in the system of this disclosure.

[0158] It should be noted that the computer-readable storage medium disclosed herein may be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable storage medium may be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In this disclosure, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable computer program instructions. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media can also be any computer-readable storage medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. Computer program instructions contained on a computer-readable storage medium can be transmitted using any suitable medium, including but not limited to: wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0159] In another aspect, this disclosure also provides a computer-readable storage medium, which may be included in the device described in the above embodiments; or it may exist independently and not assembled into the device. The computer-readable storage medium carries one or more programs that, when executed by the device, enable the device to perform the following functions: upon receiving a water replenishment request from a water service point, comparing the level of the flexible water tank corresponding to the water service point with a first preset threshold; when the level of the flexible water tank corresponding to the water service point is greater than the first preset threshold, replenishing the water service point through a secondary pressure regulating device in a water recycling system; and when the level of the flexible water tank corresponding to the water service point is less than or equal to the first preset threshold, performing a water replenishment method on the flexible water tank corresponding to the water service point.

[0160] According to one aspect of this disclosure, a computer program product or computer program is provided, comprising computer program instructions stored in a computer-readable storage medium. The computer program instructions are read from the computer-readable storage medium, and a processor executes the computer program instructions to implement the methods provided in various optional implementations of the above embodiments.

[0161] From the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions of the embodiments of this disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, or portable hard drive) and includes several computer program instructions to cause an electronic device (such as a server or terminal device) to execute the method according to the embodiments of this disclosure.

[0162] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims.

[0163] It should be understood that this disclosure is not limited to the detailed structures, drawing arrangements or implementations shown herein; rather, this disclosure is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended claims.

Claims

1. A water recycling and reuse system for locomotives to achieve water recycling without the need for replenishment, characterized in that, include: A recyclable water tank is used to receive and store byproduct water from hydrogen fuel cell systems; The first pressurization device is connected to the recycling water tank and is used to pressurize and pump out the by-product water from the recycling water tank. A compact water treatment device is connected to the outlet of the first booster device and is used to perform metal ion filtration and disinfection on the by-product water pumped out by the first booster device. A distributed flexible water tank, connected to the outlet of the compact water treatment device, is distributed and deployed in the interior space of the locomotive to store filtered and sterilized water; The secondary pressure regulating device is connected to the outlet of the distributed flexible water tank and is used to regulate the pressure of the filtered and sterilized water and stably deliver it to various domestic service water points inside the locomotive to meet the domestic service water demand inside the locomotive.

2. The system according to claim 1, characterized in that, Also includes: A heat exchange device is installed in the water flow path between the recycled water tank and the first pressurization device to cool the by-product water flowing towards the first pressurization device; or... The heat exchange device is also used to transfer heat from the by-product water to the locomotive's heat-using unit.

3. The system according to claim 1, characterized in that, Each flexible water tank is equipped with an inlet solenoid valve and a level gauge for monitoring the internal liquid level at its inlet end; wherein the inlet solenoid valve is used to connect or disconnect the water flow to the flexible water tank, and the level gauge is used to detect the water level in the flexible water tank.

4. The system according to claim 1, characterized in that, Also includes: The second pressurization device is connected to the recycling water tank; The second pressurization device is configured to pump byproduct water from the recycling tank to the cleaning operation unit inside and outside the locomotive in response to a locomotive cleaning command.

5. The system according to claim 1, characterized in that, Also includes: An overflow protection module, comprising a drain valve disposed at the bottom of the recycling tank and / or the distributed flexible tank, and a control unit connected to the drain valve; The control unit is configured to: when the liquid level of any distributed flexible water tank or recycling water tank is detected to exceed the safety limit, open the drain valve of the corresponding water tank to release the liquid until the liquid level returns to normal.

6. A method for realizing water recycling and reuse without water replenishment in locomotives, applied to a water recycling and reuse system, characterized in that, include: When a water replenishment request is received from a water service point, the liquid level of the flexible water tank corresponding to the water service point is compared with a first preset threshold. When the liquid level of the flexible water tank corresponding to the water service point is greater than the first preset threshold, water is replenished to the water service point through the secondary pressure regulating device in the water recycling system. When the liquid level of the flexible water tank corresponding to the water service point is less than or equal to the first preset threshold, a water replenishment method is performed on the flexible water tank corresponding to the water service point.

7. The method according to claim 6, characterized in that, A water replenishment method is performed on the flexible water tank corresponding to the aforementioned domestic water service point, including: Confirm that the liquid level in the recycling tank of the water recycling system is higher than the second preset threshold. Open the inlet solenoid valve of the flexible water tank corresponding to the domestic water service point, and start the first pressurization device of the water recycling system to replenish the flexible water tank corresponding to the domestic water service point with water from the recycling water tank. When the level of the flexible water tank corresponding to the water service point is detected by the level gauge to reach the third preset threshold, the inlet solenoid valve of the flexible water tank corresponding to the water service point is closed, wherein the third preset threshold is greater than the first preset threshold.

8. The method according to claim 7, characterized in that, The method further includes: When all the inlet solenoid valves of the flexible water tanks in the water recycling system are closed, the first booster device is shut down.

9. The method according to claim 6, characterized in that, Also includes: Receive locomotive cleaning instructions from the cleaning operation unit; In response to the locomotive cleaning command, and after confirming that the liquid level in the recycling water tank meets the requirements, the second pressurization device of the water recycling system is activated to supply water to the cleaning operation unit.

10. A locomotive, characterized in that, Includes the water recycling system according to any one of claims 1 to 5.

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