Modular electrical cabinet system and water supply monitoring method

Abstract

The application provides a modular electrical cabinet system and a water supply monitoring method, which comprises the following steps: step one, acquiring total water supply pressure data and total flow data to generate a pressure curve; and step two, acquiring floor pressure drop rate data, and estimating the number of water outlet valves used and the use duration in different floors according to the pressure drop rate data, the pressure curve and the total flow data. The electrical cabinet comprises a plurality of modules, and the hardware devices of each module are integrated and installed in the corresponding module box. The system further comprises an interface module, which comprises X1 plug row ports,..., XN plug row ports, X1 plug row heads,..., XN plug row heads, and each XN plug row port is connected to the XN plug row head in a plug-in manner. The application can facilitate the maintenance and replacement of the modules in the electrical cabinet, ensure normal water use of residents, detect the leakage position of the pipe network on different floors, timely assign staff to detect and maintain, save water resources, and reduce the problem of paying a large amount of fees due to pipe network leakage.

Description

Technical Field

[0001] This invention relates to the field of water supply electrical cabinet technology, specifically to a modular electrical cabinet system and a water supply monitoring method. Background Technology

[0002] The International Water Association (IWA) defines leakage as including both apparent and actual leakage. Some leaks can be reduced by improving management, while seepage requires specific technical measures to minimize. Pipeline leaks cause a drop in water pressure, necessitating increased pressure to maintain normal water supply. This not only increases energy consumption but also exacerbates the leak, creating a vicious cycle and further wasting resources. When leaks occur inside residents' homes or within walls, compensation for residents' losses and costs associated with wall repairs are required. Currently, seepage is one of the biggest challenges facing major water companies and a significant factor affecting tap water revenue. Prevention methods include timely detection and repair of leaks to reduce overall leakage.

[0003] High-rise buildings require secondary pressurization for water supply, necessitating secondary water supply equipment. The electrical control cabinet of this secondary water supply equipment is the control unit, controlling the water pumps to operate as needed via a frequency converter. Multiple control cabinets are needed to control multiple water pumps to regulate water pressure. Traditional secondary control cabinets integrate several modules, resulting in complex wiring. When electrical components malfunction, the system must be shut down, the fault located on-site, and replacement performed. This process demands a high level of technical skill from maintenance workers and is time-consuming. Since water supply facilities are crucial for production and daily life, excessive maintenance time can disrupt normal water supply. Modern control cabinets include modular designs where each module can be disassembled independently. Summary of the Invention

[0004] In view of this, the problem to be solved by the present invention is to provide a modular electrical cabinet system and a water supply monitoring method, which can facilitate the maintenance and replacement of each module in the electrical cabinet, ensure normal water use for residents, detect the location of leaks in the pipe network on different floors, and promptly dispatch personnel to inspect and repair, thereby saving water resources and reducing the problem of paying large sums of money due to pipe network leaks.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] A modular electrical cabinet system and a water supply monitoring method, including step one: acquiring total water supply pressure data and total flow data, and generating a pressure curve;

[0007] Step 2: Obtain the pressure drop rate data for each floor. Based on the pressure drop rate data, pressure curve, and total flow rate data, estimate the number of water outlet valves to be used and their usage time in different floors.

[0008] Furthermore, the method for obtaining the pressure curve is as follows: the supplementary pressure drop rate at different times is calculated based on the total flow data at different times, the supplementary pressure drop rate is superimposed on the water supply pressure data to generate the actual pressure drop rate data, and a pressure curve with time as the horizontal axis and pressure drop rate as the vertical axis is generated based on the actual pressure drop rate data.

[0009] Furthermore, the system continuously acquires water level data from the water supply tank and periodically calibrates the total flow rate data.

[0010] Furthermore, step one includes a pressure curve screening strategy: obtaining the pressure drop time and pressure drop value of the pressure curve, and determining whether they are lower than the pressure drop threshold and time threshold respectively. If yes, it is an invalid pressure curve; otherwise, it is a valid pressure curve.

[0011] Furthermore, the pressure drop rate data includes several single valve pressure drop rate data, and each single valve pressure drop rate data corresponds to a water outlet valve at a set floor and a set location;

[0012] The method for obtaining the single-valve pressure drop rate data is as follows: only one outlet valve is opened in the entire building, and the effective pressure drop rate is recorded at different opening degrees (at different outlet flow rates).

[0013] Furthermore, the pressure drop rate data includes several sets of pressure drop rate data corresponding to different total water supply pressure ranges. Step two includes determining the pressure range of the total water supply pressure and retrieving the pressure drop rate data set of the corresponding pressure range to accurately monitor the number of water outlet valves used on different floors, their approximate location, and usage time.

[0014] Furthermore, by acquiring data on the water level in the water supply tank and the number and duration of use of the water outlet valves, and through logical schemes and neural network analysis, the number of residents in the building and their water usage can be estimated, thereby accurately controlling the pre-stored water level in the water supply tank.

[0015] Furthermore, it includes a power supply module, a frequency converter module, a control module, a backup module, a switch module, and a switch module; the hardware devices of each module are integrated and installed in the corresponding module box. The system also includes an interface module, which includes X1 socket, ..., XN socket, X1 socket head, ... XN socket head. Each XN socket is plugged into an XN socket head to enable data communication between the module boxes.

[0016] Furthermore, the inverter module includes several U1 inverters, ...Un inverters with the same circuit structure and separately configured. The Un inverters communicate with the XN connectors via the XN connector. The control module controls the Un inverters to operate in a loop based on the received data, determines whether the Un inverters are working properly based on the received sensor data, and switches to the next Un inverter in a timely manner.

[0017] Furthermore, the power supply module includes a U5 switching power supply and a U6 switching power supply for outputting low-voltage electricity, and three-phase lines L1, L2, and L3 for transmitting high-voltage electricity. The three-phase lines L1, L2, and L3 are powered through high-voltage sockets and high-voltage connectors, while the U5 switching power supply and the U6 switching power supply are powered through low-voltage sockets and low-voltage connectors.

[0018] The advantages and positive effects of this invention are:

[0019] (1) By continuously acquiring the frequency conversion data of the frequency converter, the pressure change rate and flow rate data of the water supply pressure at different times are calculated under the condition of stable water supply. At the same time, the single valve pressure drop rate data of the outlet valve in the building is obtained by actual data acquisition or pipeline simulation. When the outlet valve is opened, the frequency converter operates and causes the water supply flow to change. Based on the pressure curve and the rate of change of flow, the number of valves opened and the approximate opening position are predicted. Thus, the number of outlet valves opened and closed at different times on different floors can be estimated more accurately to monitor the operation of the outlet valves. When abnormal operation or abnormal valve position of the outlet valve is detected, water resources are saved while reducing the problem of large compensation costs due to pipeline leakage.

[0020] (2) By integrating and installing each module in the corresponding module box, the electrical control cabinet is equipped with a corresponding installation slot. The interface module includes X1 socket, ..., XN socket, X1 socket head, ... XN socket head. Several XN sockets are installed on the module box, and XN socket heads are installed in the corresponding installation slot. Each module can be quickly installed by plugging in, or each module can be connected to several sockets or socket heads through wires, which facilitates the quick disassembly and replacement of each module. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a system distribution diagram of an integrated frequency converter control cabinet system that is easy to maintain and replace, as described in this invention, within the control cabinet.

[0023] Figure 2 This is a partial circuit connection diagram of the power supply module of an integrated frequency converter control cabinet system that is easy to maintain and replace according to the present invention.

[0024] Figure 3 This is a circuit connection diagram of the power supply module of an integrated frequency converter control cabinet system that is easy to maintain and replace according to the present invention.

[0025] Figure 4 This is a circuit connection diagram of the inverter module of an integrated variable frequency control cabinet system that is easy to maintain and replace according to the present invention.

[0026] Figure 5 This is a main power circuit connection diagram of an integrated frequency converter control cabinet system that is easy to maintain and replace according to the present invention.

[0027] Figure 6 This is a circuit connection diagram of the indicator peripherals, switch module, and U-signal isolator of an integrated frequency converter control cabinet system that is easy to maintain and replace according to the present invention;

[0028] Figure 7 This is a circuit diagram of the A1 main control chip connection of an integrated frequency converter control cabinet system that is easy to maintain and replace according to the present invention.

[0029] Figure 8 This is a connection circuit diagram of a spare An expansion chip for an integrated frequency converter control cabinet system that is easy to maintain and replace, according to the present invention. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] This invention provides a modular electrical cabinet system and a water supply monitoring method, such as... Figure 1 As shown, the system includes a power supply module for providing different voltages, a frequency converter module for driving the water pump, a control module for receiving data and providing feedback, a backup module for receiving and processing data, a switch module for transmitting data from external devices, a switch module for manually controlling the system's actions, and an interface module for connecting external devices.

[0034] To facilitate quick assembly, disassembly, and maintenance of each module, the power supply module, inverter module, control module, backup control module, switch module, switch module, and interface module are all designed and integrated individually. Each module is integrated into a module box that can be quickly disassembled and installed. The electrical control cabinet is equipped with corresponding mounting slots for placing the module boxes. The modules communicate with each other only through the interface module, which facilitates quick assembly, disassembly, and replacement of each module and improves maintenance efficiency.

[0035] Preferably, when the electrical control cabinet malfunctions, the frequency converter module, power supply module, and switch module are the main modules to ensure normal water supply. In order to further ensure water supply efficiency and quickly restore water supply, the back of the corresponding module boxes of the frequency converter module, power supply module, and switch module are equipped with power sockets to ensure data communication between modules, and the modules can be quickly replaced by sliding drawers.

[0036] When the electrical control cabinet malfunctions, simply check if each module is functioning correctly, promptly remove the malfunctioning module, and replace it with a functional one. This will quickly restore water supply and improve maintenance efficiency. The replaced modules can be disassembled and repaired later for future use.

[0037] like Figure 2 As shown, the SPD surge protector, V1 current transformer, V2 current transformer and V3 current transformer, three-phase lines L1-1, L2-1, L3-1 and ground line N-1, U5 switching power supply, U6 switching power supply and X socket integrated in the power supply module are all connected to the outside through X6 socket and X5 socket. The power supply module is integrated into a module box to facilitate quick installation and removal of the power supply module.

[0038] The power supply module's module box has X5 and X6 power strip ports on the back, and X5 and X6 power strip heads on the bottom of the mounting slot (the positions of the power strip ports and heads can be reversed). The power supply module integrates three-phase lines L1, L2, L3 and ground line N. The input and output terminals of the three-phase lines L1, L2, L3 and ground line N are connected to the X5 power strip ports. The interface module includes X0 power strip ports (in the form of a power strip, including several individual interfaces). The X5 power strip heads are electrically connected to the X0 power strip ports, such as... Figure 5 As shown, the X0 power strip is connected to the main power supply of the peripheral device (the customer's power supply in the figure), so that the main power supply is connected to the three-phase lines L1, L2, L3 and the ground line N.

[0039] Current transformers V1, V2, and V3 are used to obtain the current flow status on the three-phase lines L1, L2, and L3. The output terminals of current transformers V1, V2, and V3 are electrically connected to the X6 connector, which is electrically connected to the communication input of the U23 power analyzer to facilitate data exchange between the current transformers V1, V2, and V3 and the U23 power analyzer.

[0040] Preferably, the U23 power analyzer is usually installed on the door of the electrical control cabinet, and the U23 power analyzer comes with a power supply wire that can be directly connected to the three-phase lines L1, L2, L3 and ground wire N in the power supply module through the power strip, without affecting the quick installation and removal of the power supply module.

[0041] like Figure 3 As shown, three-phase lines L1, L2, L3 and ground line N are connected in parallel with three-phase lines L1-1, L2-1, L3-1 and ground line N-1, respectively. The output terminals of three-phase lines L1-1 and L2-1 are electrically connected to the X5 power strip port. The interface module includes an X3 power strip port for connecting external devices. The X5 power strip head is electrically connected to the X3 power strip port. The X3 power strip port is used for connecting external electric valves and several M exhaust fans, ensuring data communication between the electric valves and the M exhaust fans and the power supply module, ensuring that the power supply module supplies power to the electric valves and the M exhaust fans normally, and without affecting the quick installation and removal of the power supply module.

[0042] Preferably, an electronically controlled switch circuit for controlling the operation of the electric valve and several M exhaust fans can be provided between the X5 socket and the X3 socket, so that the control module can automatically control the operation of the electric valve and several M exhaust fans.

[0043] A U5 switching power supply, a U6 switching power supply, and an X socket are connected in series between the three-phase line L3-1 and the ground line N-1, respectively. The U5 switching power supply provides 0V and 24V power, the U6 switching power supply provides 0V and 5V voltage, and the X socket is used to power external devices. The output terminals of both the U5 and U6 switching power supplies are connected to the X6 power strip.

[0044] The electrical control cabinet is also equipped with a U25 serial port server for data transmission. The power port of the U25 serial port server is electrically connected to the X6 power strip to provide 5V power to the U25 serial port server.

[0045] The U5 switching power supply outputs 24V voltage through the X6 connector. The X6 connector is connected to the H1 indicator light, H2 indicator light, H3 alarm, several U isolators, and several U spare isolators to supply power to them.

[0046] like Figure 4 As shown, the X5 power strip is electrically connected to three-phase lines L1-2, L2-2, L3-2 and ground line N-2, connecting these three-phase lines and ground line N-2 to the main power supply (energizing them). The inverter module includes U1 inverter, U2 inverter, and U3 inverter, which are integrated and installed in three module boxes respectively. Each inverter has the same connection circuit and is powered through three-phase lines L1-2, L2-2, L3-2 and ground line N-2.

[0047] Taking the U1 frequency converter as an example: The U1 frequency converter is integrated into a module box. The back of the module box has X7 and X8 connectors. The X7 connector is used to connect to the power supply port. The corresponding X7 connectors are connected to the M1 water pump and the three-phase lines L1-2, L2-2, and L3-2, respectively, connecting the M1 water pump to the group power supply. The water supply pressure of the M1 water pump is adjusted by the U1 frequency converter. The X8 connector is used to connect to the control port of the U1 frequency converter. The corresponding X8 connector communicates with the control module, allowing the control module to control the operation of the M1 water pump.

[0048] The U1 inverter has an X7 power connector. Three-phase lines L1-2, L2-2, and L3-2 are connected in parallel to the X7 power connector. The interface module includes an X2 power connector. The X7 power connector is electrically connected to the X2 power connector. The X2 power connector is used to connect to the external M1 water pump, and the M1 water pump is powered through the U1 inverter.

[0049] Similarly, the U2 inverter has X9 and X10 sockets on the back, while the U3 inverter's module box has X11 and X12 sockets on the back. In case of a fault in the U1, U2, or U3 inverters, they can be quickly disassembled and replaced.

[0050] like Figure 7As shown, the control module includes an A1 control chip that receives data and provides information feedback. Several OUT output terminals of the A1 control chip are connected to several K relays, which are used to control the operation of U1 frequency converter, U2 frequency converter, U3 frequency converter, M exhaust fan and electric valve (the switch control circuits corresponding to the K relays are arranged in the electrical control cabinet and are not integrated into the module).

[0051] The YIN input terminal of the control module is connected to the X13 socket. An X13 socket is installed in the mounting slot corresponding to the switch module, and an X13 socket port is located on the back of the module box corresponding to the switch module. The switch module integrates switches S1, S2, ..., Sn, which can be manually controlled to activate the electrical control cabinet. Both ends (input and output) of the aforementioned switches are electrically connected to the X13 socket port to ensure signal communication between the switches and the A1 control chip, allowing the A1 control chip to receive control signals.

[0052] like Figure 8 and Figure 6 As shown, the control module also integrates A2 expansion chips, A3 expansion chips, and several U-signal isolators. The A2 and A3 expansion chips communicate with the A1 control chip. The A2 expansion chip communicates with the X8, X10, and X12 connectors to acquire operating data from the U1, U2, and U3 frequency converters, enabling the A1 control chip to receive this data. The communication output of the U-signal isolators connects to the A3 expansion chip, and the communication input connects to the X3 port. The X3 port connects to external sensors (including pressure sensors, level sensors, etc.) so that the A1 control chip can receive data collected by these sensors.

[0053] like Figure 6 As shown, the X6 power strip is used to provide 0V and 24V voltages (because it is connected to the output terminals of the U5 and U6 switching power supplies). The X6 power strip is also connected to the power ports of several U signal isolators, H indicator lights, H3 alarms, and the U27 human-machine interface (touchscreen display) to power them. The output terminal of the X6 power strip is electrically connected to the X4 power strip port, which can be used to provide 24V voltage. The power ports of the A1 control chip, A2 expansion chip, and A3 expansion chip within the control module are all connected to the X4 power strip port to power the chips.

[0054] The backup module includes several backup U-signal isolators and backup A4, A5, and A6 expansion chips. The A4, A5, and A6 expansion chips all communicate with the A1 control chip. Each expansion chip is connected to several backup U-signal isolators. The connection method for the backup U-signal isolators is the same as that for conventional U-signal isolators (all connected to external sensors via the X3 connector). When a data acquisition failure occurs in the control chip, the sensor can be directly connected to the backup U-signal isolator, quickly and efficiently resolving the fault (giving maintenance personnel sufficient time for repairs).

[0055] like Figure 6 As shown, the switch module integrates a U26 switch and a U25 serial server. The power supply ports of both the U26 switch and the U25 serial server are connected to the X6 power strip to supply power. The communication input of the U25 serial server communicates with the communication output of the U23 power analyzer, and the communication output of the U25 serial server communicates with the U26 switch. The communication output of the U26 switch communicates with the A1 control chip to receive data collected by the U23 power analyzer. The communication input of the U25 serial server is also connected to a U27 HMI (touchscreen display), and the power supply port of the U27 HMI is electrically connected to the X4 power strip to supply power.

[0056] The electrical control cabinet also houses a U24 temperature and humidity transmitter. The power supply port of the U24 temperature and humidity transmitter is connected to the X4 port to supply power. The communication output of the U24 temperature and humidity transmitter is interconnected with the communication input of the U25 serial server to transmit the data collected by the U24 temperature and humidity transmitter to the A1 control chip.

[0057] To facilitate data exchange between the electrical control cabinet and a remote host computer, the cabinet is equipped with a remote transmission module capable of wireless data transmission. This module allows for remote monitoring of the cabinet's operation and remote control of its actions. In the event of a signal failure, the module automatically activates the control cabinet. The host computer acquires the operating time and frequency curves of the inverter and water pump, providing maintenance suggestions to ensure the long-term stable operation of the electrical control cabinet.

[0058] Water supply monitoring method based on the above system:

[0059] Water pumps and electrical control cabinets are usually installed in underground garages to supply water to residents on different floors. Due to the different elevations of the pipes on different floors, the water pressure in the pipes on different floors will vary during actual water supply. For example, the water pressure from the taps on the top floor (hereinafter referred to as the water outlet valves) will inevitably be lower than the water pressure from the water outlet valves on the first floor.

[0060] With the widespread adoption of variable frequency pumps, they have been extensively used in building water supply systems to ensure stable water pressure. However, due to differences in discharge flow rate and drainage pressure at different floors, the opening of these valves on different floors has varying impacts on the water supply pressure of the variable frequency pump in the garage.

[0061] Therefore, by obtaining the rate of change of the water supply pressure of the variable frequency pump and the corresponding water supply flow rate, we can jointly estimate the floor and approximate location of the (open) outlet valve, as well as the number of outlet valves that are open, so as to detect in advance whether there is a pipeline leak and the approximate location of the pipeline leak, so as to dispatch maintenance personnel to inspect and repair in a timely manner.

[0062] Step 1: Obtain total water supply pressure data and total flow data, and generate a pressure curve.

[0063] The working principle of a variable frequency pump is to monitor the water supply pressure. When the detected water supply pressure is lower than the set pressure, the variable frequency pump automatically starts to supplement the water supply, ensuring the stability of the water supply pressure. Therefore, when a water outlet valve is opened in a floor, the water supply pressure of the variable frequency pump will fluctuate. By acquiring the operating data of the frequency converter, the total flow rate at different times can be directly calculated.

[0064] The pressure curve is obtained by calculating the replenishment pressure drop rate at different times based on the total flow data at different times. The replenishment flow should cause the water supply pressure to rise, but the actual water supply pressure tends to stabilize. The pressure increase caused by the replenishment flow is defined as the replenishment pressure drop, and the rate of change of the replenishment pressure drop is defined as the replenishment pressure drop rate.

[0065] The pressure drop rate is superimposed on the current water supply pressure data (the actual pressure change rate of the variable frequency pump outlet) and the actual pressure drop rate data (the change data of the total water supply pressure) is generated. Based on the actual pressure drop rate data, a pressure curve is generated with time as the horizontal axis and pressure drop rate as the vertical axis.

[0066] To improve the accuracy of monitoring data (accuracy of the pressure curve), the liquid level data in the water supply tank is continuously acquired, and the total flow rate data is calibrated periodically. Simultaneously, the water inlet signal and liquid level data of the water tank are acquired, and the flow rate in the tank is calculated to accurately determine the ozone dosage for water disinfection.

[0067] To ensure the validity of the pressure curve, a pressure curve screening strategy is set: a pressure drop threshold and a time threshold are set. If the time of pressure drop is lower than the set threshold or the pressure drop value is lower than the set threshold, it is determined that no outlet valve is open, and the pressure curve during that period is invalid. If the time of pressure drop is not lower than the set threshold or the pressure drop value is not lower than the set threshold, it is determined that an outlet valve is open, and the pressure curve during that period is valid.

[0068] Step 2: Obtain the pressure drop rate data for each floor. Based on the pressure drop rate data, pressure curve, and total flow rate data, estimate the number of water outlet valves to be used and their usage time in different floors.

[0069] The pressure drop rate data includes several single valve pressure drop rate data. Each single valve pressure drop rate data corresponds to a water outlet valve in the floor, and the rate of decrease in water supply pressure at different opening degrees (different water flow rates).

[0070] Because the variable frequency pump provides stable water supply, when one outlet valve is opened (during pressure relief), the impact on the water supply pressure is constant (the pressure drop rate is constant).

[0071] The method for obtaining single-valve pressure drop rate data is as follows: only one outlet valve is opened in the entire building, and the effective pressure drop rate is recorded at different opening degrees (different outlet flow rates). Typically, the effective pressure drop rates at one-third, two-thirds, and fully open opening degrees are collected, and the single-valve pressure drop rate data for that outlet valve is calculated.

[0072] The same method can be used to obtain single-valve pressure drop rate data for the entire building and enter it into the system. Alternatively, the pipe layout and valve installation within each floor can be surveyed to simulate and calculate the single-valve pressure drop rate data (but this method yields data with a larger error).

[0073] In actual water supply pipelines, to prevent excessive water supply pressure from causing pipe rupture, relief valves for pressure relief or pressure stabilizing valves for pressure stabilization are installed. If a pressure stabilizing valve is installed, the pressure at the output end of the valve is defined as the water supply pressure. If a relief valve is installed, it is necessary to obtain the relief valve flow rate and pressure drop data (the rate at which the water supply pressure decreases when the relief valve is open), monitor the opening status of the relief valve, and when the relief valve is open, treat it as a water outlet valve in the calculation to eliminate the interference of the relief valve.

[0074] The monitoring method takes a specific time period as an example: A time period is defined on the pressure curve during which water outlet valves are open. The pressure drop rate value of the pressure curve during this time period and the total flow rate value for the corresponding time period are obtained. Based on the pressure drop rate value, total flow rate value, and pressure drop rate data, the number of open water outlet valves and the floor where the valves are located are calculated. The opening status of the water outlet valves is continuously monitored to obtain the usage duration of the valves.

[0075] Because the pressure loss in the pipeline is related to the pipeline diameter, pipeline length, number of bends, and valve type, the location of the outlet valve can be roughly estimated. When an outlet valve is detected to be open but not located in the resident's room, or when the outlet valve is open for more than the set time threshold, an alarm will be activated immediately, and maintenance personnel will be dispatched to inspect it.

[0076] Although the theoretical variable frequency pump provides stable water supply, the supply pressure will decrease during peak water usage periods. When the actual supply pressure decreases, the pressure drop rate data for each outlet valve will change. To further ensure monitoring accuracy, multiple sets of pressure drop rate data are provided, each corresponding to a different range of total supply pressure (actual supply pressure).

[0077] In actual forecasting, based on the actual water supply pressure range, the pressure drop rate data of the corresponding components are retrieved to accurately monitor the number of water outlet valves used on different floors, their approximate locations, and usage durations.

[0078] A method for controlling the pre-stored water level in a water supply tank can predict the number of residents and water usage in a building based on the number of water valves to be opened, the duration of opening, and the floor where the valves are opened. This can be achieved through logical schemes and neural network analysis, thereby accurately controlling the pre-stored water level in the water supply tank. This avoids problems such as insufficient water supply (due to new residents moving in) or excessive pre-stored water in the tank, which could lead to bacterial growth and affect water quality due to prolonged storage of water in the tank.

[0079] Residential water consumption is affected by various factors, including season, weather, holidays, apartment type, population structure, and occupancy rate. While population structure changes can be predicted using water supply monitoring methods, once the population structure and size are fixed, daily water consumption remains relatively stable with fewer influencing factors. To ensure the water level in the storage tank remains within a reasonable range, preventing the accumulation of "stale water" and ensuring users have access to fresh water, a water tank level prediction algorithm is provided. This algorithm includes a data acquisition phase, where the water level in the storage tank is collected at set intervals and stored in a storage module.

[0080] Building the model requires time to accumulate data. First, data is collected, with the water level in the tank recorded hourly, and a simple prediction of daily water consumption made. The prediction formula is: Daily water consumption at a specific time = Baseline amount * Weekly pattern factor * Daily pattern factor * Event pattern factor.

[0081] Weekly regularity factor: Summarizing weekly water consumption over a period of time yields a periodic regularity factor. Daily regularity factor: Analyzing and summarizing daily hourly water consumption yields a daily regularity factor. Event regularity factor: Analyzing and summarizing water consumption on special dates such as holidays yields an event regularity factor. Baseline value: Using the average value of a period of time as a benchmark. Preliminary model establishment can roughly predict residential water consumption and adjust water tank levels.

[0082] Once enough data has been accumulated, an LSTM model is used to train the collected data and generate a general neural network prediction model.

[0083] During LSTM model training, the input data includes not only the water level in the tank but also external variables such as temperature, humidity, weekdays, and holidays. The more data available, the more accurate the neural network prediction model will be. During prediction, the data is input into the model and encoded / decoded, then features are extracted and used for prediction. These features primarily include season, weather, and holidays.

[0084] The electrical cabinet is equipped with several variable frequency pumps (three are used in this embodiment). The main control module sequentially controls the water supply pumps to act as the main pumps in turn, and alternately supply water. At the same time, it records the running time of each water supply pump. The main control module receives data from the sensors and the frequency converter to determine whether the water supply pump is operating normally. When normal operation is detected, the main control module controls the water supply pump to continue operating. When abnormal operation of the frequency converter is detected, the main control module quickly switches to the next frequency converter to ensure the stability of the water supply.

[0085] According to relevant literature, the inverter performs best and has the highest energy conversion efficiency when operating at 30-35Hz. Based on the inverter data and the corresponding total flow data, the power and flow data of the water supply pumps are calculated and updated. Multiple pumps are controlled to supply water simultaneously to optimize the number and operating parameters of the inverter pumps. When one inverter can meet the water supply pressure requirements, only one inverter is operated.

[0086] When one frequency converter cannot meet the water supply pressure requirements, the next frequency converter needs to be started. At this time, both frequency converters need to output their optimal frequency values. Both frequency converters output in the 30-35Hz frequency band, with identical output values. If both frequency converters output below 30-35Hz, ensure the first converter operates within the 30-35Hz frequency band, and adjust the output of the other as needed. If both frequency converters output above 30-35Hz, first operate the first frequency converter in the 50Hz frequency band, and adjust the output of the other as needed.

[0087] The embodiments of the present invention have been described in detail above, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of this patent.

Claims

1. A modular electrical cabinet water supply monitoring method, characterized by, The system comprises a power supply module, a frequency converter module, a control module, a backup module, a switch module and a switch module; the hardware devices of each module are integrated and installed in the corresponding module box, and the system further comprises an interface module; the interface module comprises X1 plug row ports, …, XN plug row ports, X1 plug row heads, …, XN plug row heads, each XN plug row port is connected with the XN plug row head in plug-in connection, and is used for data intercommunication between the module boxes; The water supply monitoring method comprises the following steps: Step 1: obtaining total water supply pressure data and total flow data; Step 2: calculating the supplementary pressure drop rate at different times according to the total flow data at different times, and generating actual pressure drop rate data by superimposing the supplementary pressure drop rate on the water supply pressure data; the pressure drop rate data comprises a plurality of single valve pressure drop rate data, each single valve pressure drop rate data corresponds to the drop rate of the water supply pressure of one water outlet valve at different opening degrees in a floor; The single valve pressure drop rate data is obtained by: opening only one water outlet valve in the whole building, and recording the effective pressure drop rate at different opening degrees; The pressure drop rate data comprises a plurality of pressure drop rate data groups corresponding to different total water supply pressure intervals; Step 3: generating a pressure curve with time as the horizontal coordinate and pressure drop rate as the vertical coordinate according to the actual pressure drop rate data; Step 4: obtaining the pressure drop time and pressure drop value of the pressure curve, and judging whether they are respectively lower than the pressure drop threshold value and the time threshold value; if yes, the pressure curve is invalid; if no, the pressure curve is valid; Step 5: continuously obtaining the liquid level data in the water supply tank, and calibrating the total flow data at regular time intervals; Step 6: judging the pressure interval of the total water supply pressure, calling the pressure drop rate data group corresponding to the pressure interval, and accurately monitoring the use quantity, use position and use time length of the water outlet valves in different floors.

2. The modular electrical cabinet water supply monitoring method of claim 1, wherein, The system further comprises obtaining the liquid level data in the water supply tank and the use quantity and use time length of the water outlet valves, and accurately controlling the pre-stored water level in the water supply tank by logical scheme and neural network analysis, and estimating the number of residents and water consumption in the building.

3. The modular electrical cabinet water supply monitoring method of claim 2, wherein, The frequency converter module comprises a plurality of U1 frequency converters, …, Un frequency converters which have the same circuit structure and are separately arranged; the Un frequency converters are in data intercommunication with the XN plug row ports and the XN plug row heads; the control module controls the Un frequency converters to act cyclically according to the received data, judges whether the Un frequency converters work normally according to the received sensor data, and switches to the next Un frequency converter in time.

4. The method of claim 3, wherein, The module box of the power supply module comprises U5 switching power supply and U6 switching power supply for outputting low-voltage electricity, and three-phase lines L1, L2 and L3 for transmitting high-voltage electricity; the three-phase lines L1, L2 and L3 supply power through high-voltage plug row ports and high-voltage plug row heads; and the U5 switching power supply and the U6 switching power supply supply power through low-voltage plug row ports and low-voltage plug row heads.

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