A method and device for controlling flushing of a urinal based on a dynamic interrupt
By monitoring human signals in real time during urinal flushing and dynamically interrupting the flushing process, the problems of ineffective flushing and pollution spread in existing technologies are solved, achieving efficient water conservation and hygiene safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 闻喜县沐陶科贸工作室(个体工商户)
- Filing Date
- 2026-04-16
- Publication Date
- 2026-07-10
AI Technical Summary
Existing urinal sensor flushing devices block the sensor signal during flushing, resulting in ineffective flushing and water waste. Furthermore, the flushing process can easily cause water splashing, the spread of sewage and bacteria, and a poor user experience.
During the second flush, the sensor signal is not blocked. The flushing is interrupted when a new user approaches by real-time monitoring of human body signals, and a complete second flush is performed after the last user leaves. The dynamic interruption control logic of the sensor module, control module and flushing execution module is adopted.
It achieves efficient water conservation, prevents water splashing and pollution spread, and improves the comfort and hygiene of public restrooms, with a water saving rate of 30%-60%.
Smart Images
Figure CN122358754A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of automatic control technology for sanitary ware, and in particular to a method and device for controlling the flushing of a urinal based on dynamic interruption. Background Technology
[0002] Urinals are frequently used facilities in public restrooms and have significant water-saving potential. Existing urinal sensor-activated flushing systems generally employ control logic that blocks the sensor signal during flushing: a person approaching triggers a pre-flush, and the person leaving initiates a second flush, during which the sensor is forcibly blocked to complete a fixed flush duration. This results in a large amount of ineffective flushing, leading to excessive water waste. Especially in high-traffic, high-frequency use scenarios such as train stations, highway service areas, schools, and stadiums, existing technology suffers from the following problems: If a subsequent user approaches before the previous user has finished flushing, the flushing process continues, resulting in a large amount of ineffective flushing and water waste. Furthermore, the presence of someone using the device during flushing can cause splashing, the spread of wastewater and bacteria, and unpleasant odors, leading to a poor user experience and low hygiene standards. However, current technologies have long focused on improving the accuracy of pre-flushing detection, and to avoid false triggering due to water flow and mist interference, the industry generally believes that sensor signals must be shielded or ignored during flushing. This widespread belief that "detection should not be performed during flushing" constitutes a technological bias in the field.
[0003] Therefore, there is an urgent need for a urinal flushing control method and device based on dynamic interruption to overcome industry technical biases and achieve the technical effects of high efficiency, water saving, splash prevention, and hygiene and safety. Summary of the Invention
[0004] The purpose of this invention is to provide a urinal flushing control method and device based on dynamic interruption. Contrary to the teachings of the prior art, the sensing signal is not blocked during the second flush, which can achieve efficient water saving, splash prevention, and ensure hygiene and safety.
[0005] The present invention adopts the following technical solution: A method for controlling urinal flushing based on dynamic interruption includes the following steps: The sensing module detects a human approach signal and transmits it to the control module, which then controls the flushing execution module to perform a pre-flushing. The sensing module detects a signal indicating that a person has left and transmits it to the control module, which then controls the flushing execution module to start a second flush. The sensor module does not block human body detection signals during the second flush and continues to monitor human body signals; When the sensing module detects a new human signal, it transmits it to the control module, which then executes the interruption determination logic to control the flushing execution module to stop flushing. The sensing module continuously monitors the current user's human body signals. When the sensing module detects that the human body signal has left, the control module controls the flushing execution module to start the second flush. When multiple users use it continuously, steps 3) through 5 are executed in a loop.
[0006] A method for controlling urinal flushing based on dynamic interruption includes the following steps: After receiving a human proximity signal detected by the sensing module, the control module controls the flushing execution module to perform a pre-flushing. After receiving the signal from the sensor module indicating that a person has left, the control module controls the flushing execution module to start the second flush. The control module receives an instruction from the sensing module not to block the human body sensing signal during the second flush and to continuously monitor the human body signal; When the control module receives a new human signal from the sensing module, it executes an interruption determination logic and thereby controls the flushing execution module to stop flushing. After the control module receives a signal from the sensing module indicating that a human body has left, it controls the flushing execution module to start the second flush. When multiple users use it continuously, steps 3) through 5 are executed in a loop.
[0007] A method for controlling urinal flushing based on dynamic interruption includes the following steps: The flushing execution module executes the pre-flushing command, which is issued by the control module after receiving the human body approach signal detected by the sensing module; The flushing execution module initiates a second flushing command, which is issued by the control module after receiving the human body departure signal detected by the sensing module. During the second flushing command, the sensing module does not block human body sensing signals and continues to monitor human body signals. The flushing execution module executes a command to stop flushing. This command is issued by the control module when the sensing module detects a new human body signal and executes the interrupt determination logic. The flushing execution module executes a second flushing command, which is issued by the control module after the sensing module detects the human body signal leaving; When multiple users use it continuously, steps 3) through 5 are executed in a loop.
[0008] Preferably, the second flushing command in step 5) is issued after a delay T1 after the sensing module detects the human body signal leaving.
[0009] Preferably, the interruption determination logic is implemented based on the "person" signal detected by the sensing module N times consecutively; N is greater than or equal to 1.
[0010] Preferably, the interruption determination logic is based on the control module recording the signal for a period of time T2 after the sensing module detects a "person" signal; the value of T2 ranges from 0.1 to 2 seconds.
[0011] Preferably, the interruption determination logic is based on the signal strength growth rate of the sensing module exceeding a preset strength threshold S1; the range of S1 is 10% / second to 50% / second.
[0012] Preferably, the interruption determination logic is based on the distance change rate between the human body and the sensing module exceeding a preset rate threshold V1; the range of V1 is 0.3-1 m / s.
[0013] Preferably, the interruption determination logic includes: This is achieved based on the "person" signal detected N times consecutively by the sensing module; where N is greater than or equal to 1. After the sensing module detects a "person" signal, the control module records that the signal continues for more than a preset time threshold T2; the value of T2 ranges from 0.1 to 2 seconds. The signal strength growth rate of the sensing module exceeds a preset strength threshold S1; the range of S1 is 10% / second to 50% / second. This is achieved based on the rate of change of distance between the human body and the sensing module exceeding a preset rate threshold V1; V1 ranges from 0.3 to 1 meter per second. The specific determination requires that at least two conditions be met.
[0014] A water-saving control device based on a real-time interruption mechanism, employing the control method described above, includes a sensing module for real-time detection of human body approach and departure signals; a control module electrically connected to the sensing module; and a flushing execution module electrically connected to the control module, employing a solenoid valve to perform flushing and water shut-off operations.
[0015] Compared with existing technologies, the beneficial effects of this invention are: by monitoring human signals in real time during the second flushing process, the invention immediately interrupts flushing upon detecting a new user approaching, and performs a complete second flush only after the last user leaves, thus merging multiple scattered and ineffective flushes in continuous use scenarios into a single effective flush. In high-traffic areas such as train stations, schools, and service areas, water savings can reach 30%-60%, significantly reducing water consumption in public restrooms, demonstrating outstanding water-saving benefits and significant economic and environmental value.
[0016] The hygiene benefits of this invention are reflected in two aspects: firstly, preventing the spread of contamination, and secondly, ensuring effective cleaning. Firstly, the dynamic interruption mechanism prevents flushing from occurring simultaneously with use, thus avoiding water splashing and the spread of urine residue, bacteria, and odors carried by water mist to people and the surrounding environment, guaranteeing the comfort and experience of using public restrooms. Secondly, by promptly resuming and completing flushing after each user leaves, this intermittent flushing pattern and dynamic interruption duration help to flush away residual dirt in a timely manner, ensuring the final cleaning effect of the sanitary ware. This achieves water conservation by significantly reducing the total time spent on ineffective flushing while effectively maintaining the comfort and hygiene level of public restrooms.
[0017] This invention utilizes the core logic of "real-time monitoring - interruption - departure - resumption of flushing" to automatically adapt to all usage scenarios, including sparse crowds, dense crowds, and tidal crowds. It does not require dynamic parameter adjustments based on venue type or crowd density and can still operate stably in tidal crowd scenarios such as school breaks, factory lunch breaks, and event dismissals, demonstrating strong versatility and adaptability. Attached Figure Description
[0018] Figure 1 This is a flowchart of the process of the present invention. Detailed Implementation
[0019] The present invention will now be described clearly and completely with reference to the accompanying drawings and embodiments: like Figure 1 As shown, the urinal flushing control method based on dynamic interruption of the present invention includes the following steps: Example
[0020] The sensing module detects a human approach signal and transmits the signal to the control module. The control module then controls the flushing module to perform a pre-flushing. The pre-flushing time is controlled between 0.5 and 5 seconds, preferably 1 to 3 seconds. The specific pre-flushing time can be adjusted according to the type of urinal and the usage scenario.
[0021] The sensor module detects a human leaving the room and transmits it to the control module. The control module then controls the flushing execution module to start the second flush. The second flush lasts for 2-6 seconds, with a preferred duration of about 3-5 seconds. The specific duration of the second flush can be adjusted according to the type of urinal and the desired flushing effect.
[0022] The sensing module does not block human body sensing signals during the second flush and continuously monitors human body signals based on real-time anti-interference monitoring capabilities with high sampling rate and high accuracy judgment; the sampling frequency is ≥30Hz. Since the higher the sampling frequency, the faster the interruption response, but the energy consumption also increases accordingly; therefore, the preferred parameter is 50Hz-100Hz. When the sensor module detects a new human signal, it transmits it to the control module, which then executes interruption logic to stop the flushing process. The interruption logic includes the following types: One method is based on the sensing module detecting "someone" signals N times consecutively; N is greater than or equal to 1, and specifically N can be 1-10 times. Since the higher the threshold of the number of times, the lower the false judgment rate, but the response delay also increases accordingly, this invention preferably uses 3-5 times to improve the anti-interference ability and reduce the false judgment rate; for example, it can be determined that the user is approaching after detecting "someone" signals 3-5 times.
[0023] Secondly, after the sensing module detects a "person" signal, the control module records the duration of the signal. When the duration exceeds the preset time threshold T2, it is determined that the user is approaching. The value of T2 ranges from 0.1 to 2 seconds to accommodate the response characteristics of different sensing modules. A more specific range of T2 values can be set according to the selected sensing module model and installation environment.
[0024] Thirdly, it is achieved by the signal strength growth rate of the sensing module exceeding a preset strength threshold S1; the range of S1 is 10% / second to 50% / second, making it suitable for users of different body types and providing high sensitivity. The implementation involves real-time monitoring of the output signal strength of the infrared sensor, calculating the rate of change of signal strength, and determining that a new user is approaching when the rate of change exceeds S1. The preferred range of S1 is 15% / second to 30% / second.
[0025] Fourthly, it is based on the distance change rate between the human body and the sensing module exceeding a preset rate threshold V1; V1 ranges from 0.3 to 1 meter / second; its advantages are strong anti-interference capability and suitability for complex environments. Implementation method: Using an ultrasonic or laser rangefinder, the distance to the human body is monitored in real time, and the distance change rate is calculated. When the change rate exceeds V1, it is determined that a new user is approaching; the preferred value range for V1 is 0.5 meters / second. Specifically, the selection can be based on the advantages of each of the above different judgment logics combined with the performance of the selected modules. To improve judgment accuracy, at least two of the above conditions can be combined during the specific judgment. For example, satisfying three conditions is as follows: The "person" signal was detected for more than 0.3 seconds; The number of times the "person" signal is detected consecutively is ≥3; A user is considered to be approaching when the signal strength growth rate is ≥15%; The combined judgment method has the lowest false positive rate and is suitable for scenarios with high reliability requirements.
[0026] Implementation: The control module simultaneously monitors the signal duration, the number of detections, and the signal strength. Only when all three conditions are met is it determined that a new user has approached. The above methods are preferred embodiments of the present invention; those skilled in the art can choose a suitable method based on the actual application scenario.
[0027] The sensing module continuously monitors the current user's human body signal. When the sensing module detects the departure of the human body signal, the control module controls the flushing execution module to start the second flush. In step 5), the second flushing command is issued after a delay time T1 after the sensing module detects the departure of the human body signal. The delay time ranges from 0.5 to 3 seconds, with a preferred delay time of 1.2 to 1.8 seconds. The delay time can avoid frequent start and stop caused by fluctuations in the human body signal.
[0028] When multiple users use it continuously, steps 3) through 5 are executed in a loop. Example
[0029] A method for controlling urinal flushing based on dynamic interruption includes the following steps: After receiving a human proximity signal detected by the sensing module, the control module controls the flushing execution module to perform pre-flushing; the pre-flushing time is controlled between 0.5 and 5 seconds, preferably 1 to 3 seconds; the specific pre-flushing time can be adjusted according to the type of urinal and the usage scenario.
[0030] After receiving a signal from the sensor module indicating that a person has left, the control module controls the flushing execution module to start the second flush. The second flush lasts for 2-6 seconds, preferably 3-5 seconds. The duration of the second flush can be adjusted according to the type of urinal and the desired flushing effect.
[0031] The control module receives instructions from the sensing module not to block human body sensing signals during the second flush, and to continuously monitor human body signals based on real-time anti-interference monitoring capabilities with high sampling rate and high precision judgment; the sampling frequency is ≥30Hz. Since the higher the sampling frequency, the faster the interrupt response, but the energy consumption also increases accordingly; therefore, the preferred parameter is 50Hz-100Hz.
[0032] When the control module receives a new human signal from the sensing module, it executes interrupt determination logic, thereby controlling the flushing execution module to stop flushing. The interrupt determination logic includes the following types: One method is based on the sensing module detecting "someone" signals N times consecutively; N is greater than or equal to 1, and N can be 1-10. Since the higher the threshold of the number of times, the lower the false judgment rate, but the response delay also increases accordingly, this invention preferably uses 3-5 times to improve the anti-interference ability and reduce the false judgment rate; for example, it can be determined that the user is approaching after detecting "someone" signals 3-5 times.
[0033] Secondly, after the sensing module detects a "person" signal, the control module records the duration of the signal. When the duration exceeds the preset time threshold T2, it is determined that the user is approaching. The value of T2 ranges from 0.1 to 2 seconds to adapt to the response characteristics of different sensing modules. A more specific range of T2 values can be set according to the different models of sensing modules and the installation environment.
[0034] Thirdly, it is achieved by the signal strength growth rate of the sensing module exceeding a preset strength threshold S1; the range of S1 is 10% / second to 50% / second, making it suitable for users of different body types and providing high sensitivity. The implementation involves real-time monitoring of the output signal strength of the infrared sensor, calculating the rate of change of signal strength, and determining that a new user is approaching when the rate of change exceeds S1. The preferred range of S1 is 15% / second to 30% / second.
[0035] Fourthly, it is based on the distance change rate between the human body and the sensing module exceeding a preset rate threshold V1; V1 ranges from 0.3 to 1 meter / second; its advantages are strong anti-interference capability and suitability for complex environments. Implementation method: Using an ultrasonic or laser rangefinder, the distance to the human body is monitored in real time, and the distance change rate is calculated. When the change rate exceeds V1, it is determined that a new user is approaching; the preferred value range for V1 is 0.5 meters / second. Specifically, the selection can be based on the advantages of each of the above different judgment logics combined with the performance of the selected modules. To improve judgment accuracy, at least two of the above conditions can be combined during the specific judgment. For example, satisfying three conditions is as follows: The "person" signal was detected for more than 0.3 seconds; The number of times the "person" signal is detected consecutively is ≥3; A user is considered to be approaching when the signal strength growth rate is ≥15%; The combined judgment method has the lowest false positive rate and is suitable for scenarios with high reliability requirements.
[0036] Implementation: The control module simultaneously monitors the signal duration, the number of detections, and the signal strength. Only when all three conditions are met is it determined that a new user has approached. The above methods are preferred embodiments of the present invention; those skilled in the art can choose a suitable method based on the actual application scenario.
[0037] After the control module receives the human body signal detected by the sensor module and the human body leaves, it controls the flushing execution module to start the second flush. In step 5), the second flush command is issued after a delay time T1 after the human body signal is detected by the sensor module. The delay time range is 0.5 seconds to 3 seconds, and the preferred delay time is 1.2 seconds to 1.8 seconds. The delay time can avoid frequent start and stop caused by fluctuations in the human body signal.
[0038] When multiple users use it continuously, steps 3) through 5 are executed in a loop. Example
[0039] A method for controlling urinal flushing based on dynamic interruption includes the following steps: The flushing execution module executes the pre-flushing command, which is issued by the control module after receiving the human body approach signal detected by the sensing module; the pre-flushing time is controlled between 0.5 and 5 seconds, preferably 1 to 3 seconds; the specific pre-flushing time can be adjusted according to the type of urinal and the usage scenario.
[0040] The flushing execution module initiates the second flush, which is issued by the control module after receiving the human body departure signal detected by the sensing module. The second flush duration is 2-6 seconds, preferably about 3-5 seconds. The specific duration of the second flush can be adjusted according to the type of urinal and the required flushing effect.
[0041] During the second flushing command, the sensing module does not block the human body sensing signal and continuously monitors the human body signal based on the real-time anti-interference monitoring capability with high sampling rate and high accuracy judgment; the sampling frequency is ≥30Hz. Since the higher the sampling frequency, the faster the interrupt response, but the energy consumption also increases accordingly; therefore, the preferred parameter is 50Hz-100Hz.
[0042] The flushing execution module executes a command to stop flushing. This command is issued by the control module when the sensing module detects a new human body signal and executes the interruption determination logic. The interruption determination logic includes the following types: One method is based on the sensing module detecting "someone" signals N times consecutively; N is greater than or equal to 1, and specifically N can be 1-10 times. Since the higher the threshold of the number of times, the lower the false judgment rate, but the response delay also increases accordingly, this invention preferably uses 3-5 times to improve the anti-interference ability and reduce the false judgment rate; for example, it can be determined that the user is approaching after detecting "someone" signals 3-5 times.
[0043] Secondly, after the sensing module detects a "person" signal, the control module records the duration of the signal. When the duration exceeds the preset time threshold T2, it is determined that the user is approaching. The value of T2 ranges from 0.1 to 2 seconds to adapt to the response characteristics of different sensing modules. A more specific range of T2 values can be set according to the different models of sensing modules and the installation environment.
[0044] Thirdly, it is achieved by the signal strength growth rate of the sensing module exceeding a preset strength threshold S1; the range of S1 is 10% / second to 50% / second, making it suitable for users of different body types and providing high sensitivity. The implementation involves real-time monitoring of the output signal strength of the infrared sensor, calculating the rate of change of signal strength, and determining that a new user is approaching when the rate of change exceeds S1. The preferred range of S1 is 15% / second to 30% / second.
[0045] Fourthly, it is based on the distance change rate between the human body and the sensing module exceeding a preset rate threshold V1; V1 ranges from 0.3 to 1 meter / second; its advantages are strong anti-interference capability and suitability for complex environments. Implementation method: Using an ultrasonic or laser rangefinder, the distance to the human body is monitored in real time, and the distance change rate is calculated. When the change rate exceeds V1, it is determined that a new user is approaching; the preferred value range for V1 is 0.5 meters / second. Specifically, the selection can be based on the advantages of each of the above different judgment logics combined with the performance of the selected modules. To improve judgment accuracy, at least two of the above conditions can be combined during the specific judgment. For example, satisfying three conditions is as follows: The "person" signal was detected for more than 0.3 seconds; The number of times the "person" signal is detected consecutively is ≥3; A user is considered to be nearby when the signal strength growth rate is ≥15%.
[0046] The combined judgment method has the lowest false positive rate and is suitable for scenarios with high reliability requirements.
[0047] Implementation: The control module simultaneously monitors the signal duration, the number of detections, and the signal strength. Only when all three conditions are met is it determined that a new user has approached. The above methods are preferred embodiments of the present invention; those skilled in the art can choose a suitable method based on the actual application scenario.
[0048] The flushing execution module executes the second flushing command, which is issued by the control module after the sensor module detects the departure of the human body signal. In step 5), the second flushing command is issued after a delay time T1 after the sensor module detects the departure of the human body signal. The delay time range is 0.5-3 seconds, and the preferred delay time is 1.2-1.8 seconds. The delay time can avoid frequent start and stop caused by fluctuations in the human body signal.
[0049] When multiple users use it continuously, steps 3) through 5 are executed in a loop.
[0050] Thanks to advancements in sensor chip performance and sealing technology, signal filtering algorithms, and low-power, high-performance microcontrollers (MCUs) in recent years, this invention enables high-frequency, high-reliability real-time human signal detection in humid and interference-prone flushing environments, thus achieving the technical solution of "uninterrupted sensing and reliable interruption during flushing." In the three solutions described above, the sensing module can employ, but is not limited to, the following sensors: infrared sensors (active or passive), microwave sensors (Doppler radar), ultrasonic sensors (ranging sensors), radar sensors (millimeter-wave radar), pyroelectric sensors (PIR), laser sensors (ToF laser ranging), image recognition modules (camera + AI algorithm), etc. Single or multi-sensor fusion can be used to adapt to different usage scenarios; the sensing range can be adjusted within a preset range according to the actual installation environment (e.g., 0-50cm for wall-mounted urinals, 0-60cm for pedestal urinals, 0-70cm for large venues); sampling frequency: ≥30Hz, preferred parameter 50Hz-100Hz. Output signal: Binary signal "manned / unmanned", no precise distance measurement required.
[0051] Control module: Execution interrupt control logic: It adopts the built-in interrupt determination algorithm of the microcontroller or PLC controller, the built-in anti-accidental touch logic, and the built-in recovery delay control logic.
[0052] Flushing execution module: Performs flushing and water shut-off operations. Water flow is controlled by a solenoid valve, with a response time of ≤200ms, preferably ≤100ms (to ensure timely interruption).
[0053] It should be noted that although this invention introduces a flushing interruption mechanism, in typical high-traffic scenarios, the resulting frequent start-stop cycles of the solenoid valve remain within the rated lifespan of the equipment and will not cause significant additional energy consumption or equipment damage. On the contrary, the overall water-saving effect reduces pump energy consumption, thus improving the overall energy efficiency of the system. In existing technologies, during periods of high traffic (such as train stations), the solenoid valve opens and closes frequently and completely according to a fixed logic, resulting in significant mechanical wear. This invention reduces the number of complete operation cycles of the solenoid valve through an "interruption-merging" mechanism (merging multiple short flushes into a single long flush). Furthermore, this invention can also set a tiered sampling strategy: when someone approaches: high-frequency sampling (e.g., 100Hz) ensures real-time detection; after someone leaves: low-frequency sampling (e.g., 10Hz) reduces energy consumption; when completely empty: enters sleep mode (0.1Hz or complete sleep) to minimize standby power consumption. The sensing module can adopt a trigger-based operating mode, waking up the control module only when a person signal is detected. After flushing is complete, the control module enters a low-power standby state, reducing unnecessary energy consumption through the interrupt wake-up mechanism.
[0054] A water-saving control device based on a real-time interruption mechanism, employing the control method described above, includes a sensing module for real-time detection of human proximity and departure signals; a control module electrically connected to the sensing module; and a flushing execution module electrically connected to the control module, using a solenoid valve to perform flushing and water shut-off operations. In specific operation, when user A approaches the urinal, the sensing module detects the human signal, and the system performs a pre-flushing. After user A leaves the urinal, the sensing module detects the departure of the human signal, and the control module receives this signal and controls the flushing execution module to perform a second flush. During the flushing process, the system continuously monitors the human signal at a sampling frequency of ≥30Hz. If user B is detected approaching during the second flush (3-5 consecutive valid signals within the set sensing range), the system immediately closes the solenoid valve and stops flushing (response time ≤100ms). The sensing module continues to monitor user B's human signal. After user B finishes using the urinal and leaves, the sensing module detects the departure of the human signal, and the system restarts the second flush after a delay of 1-2 seconds (duration 3-5 seconds).
[0055] This invention utilizes a pre-rinse → human departure → initiation of secondary rinsing → continuous monitoring → interruption → recovery approach, applicable to various usage scenarios, and can be achieved without dynamic parameter adjustments. Furthermore, the entire system design is simple; the above effects can be achieved through control logic optimization. If the existing device's MCU performance is sufficient, no additional hardware costs are required; only the control program needs upgrading. If the existing device uses an older, low-end MCU, it needs to be replaced with a low-power MCU (such as the STM32L series), increasing hardware costs slightly (approximately 20-30 RMB). This reduces potential failure points, improving system stability without increasing operating costs.
[0056] During use, this invention can save the interrupted portion (approximately 0.5-2 seconds) of each person's secondary flush, and only perform a complete secondary flush (approximately 3-5 seconds) when the last person leaves. Through the "flushing interruption + resumption" logic, multiple scattered invalid flushes are combined into a single effective flush.
[0057] Taking a continuous flow of people (with a 5-second interval between each person) as an example: In the existing technical system, the first person: 3 seconds of pre-rinse + 4 seconds of secondary rinse = 7 seconds; the subsequent 9 people: no pre-rinse + 4 seconds of secondary rinse = 36 seconds; total: 43 seconds. In this invention, the first person: 3 seconds of pre-flushing + 0.5 seconds of secondary flushing = 3.5 seconds; the next 9 people: no pre-flushing + 0.5 seconds of secondary flushing = 4.5 seconds; the last person: no pre-flushing + 4 seconds of secondary flushing = 4 seconds. The total time is 12 seconds, which reduces the total flushing time by 72%.
[0058] Taking a tidal scenario (10-minute break between classes, sparse for the first 2 minutes, dense for the middle 6 minutes, and sparse for the last 2 minutes) as an example: In the existing technical system, the sparse phase is 3 people × 7 seconds = 21 seconds, the dense phase is 20 people × 4 seconds = 80 seconds, the sparse phase is 3 people × 4 seconds = 12 seconds, and the total is 113 seconds. In this invention, the sparse phase lasts 3 people × 7 seconds = 21 seconds, the dense phase lasts 20 people × 0.5 seconds + the last person × 4 seconds = 14 seconds, and the sparse phase lasts 3 people × 4 seconds = 12 seconds, totaling 47 seconds. The total flushing time is reduced by 58%. Comparison shows that this invention can significantly reduce flushing time, thereby achieving water conservation.
[0059] Specifically, taking a train station as an example, during peak hours, 2-3 people use the station per minute, approximately 150 people per hour. Assuming an average water saving of 3 seconds per person, this equates to 450 seconds (7.5 minutes) of water saved per hour. Assuming an average flow rate of at least 6 liters per minute for each urinal (taking a Class 2 water efficiency urinal conforming to national standard GB28377-2019 as an example), this equates to 45 liters of water saved per hour, 360 liters saved during peak hours (8 hours) per day, and approximately 130,000 liters saved per urinal per year.
[0060] For a school, about 50 people use the urinal during a 10-minute break. Assuming each person saves 3 seconds of water, each break can save 150 seconds (2.5 minutes) of water. Assuming 6 breaks per day, this can save 15 minutes of water, or about 90 liters of water. Assuming 200 school days per year, a single urinal can save 18,000 liters of water.
[0061] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A method for controlling urinal flushing based on dynamic interruption, characterized in that, Includes the following steps: 1) The sensing module detects a human body approaching and transmits it to the control module, which then controls the flushing execution module to perform a pre-flushing. 2) The sensing module detects a signal indicating that a person has left and transmits it to the control module, which then controls the flushing execution module to initiate a second flush; 3) The sensor module does not block the human body sensor signal during the second flush and continues to monitor the human body signal; 4) When the sensing module detects a new human body signal, it transmits it to the control module, which then executes the interruption judgment logic to control the flushing execution module to stop flushing. 5) The sensing module continuously monitors the human body signal of the current user. When the sensing module detects that the human body signal has left, the control module controls the flushing execution module to start the second flush. 6) When multiple people use it continuously, repeat steps 3) to 5).
2. A method for controlling urinal flushing based on dynamic interruption, characterized in that, Includes the following steps: 1) After receiving the human proximity signal detected by the sensing module, the control module controls the flushing execution module to perform pre-flushing; 2) After receiving the signal from the sensor module indicating that a person has left, the control module controls the flushing execution module to start the second flush; 3) The control module receives the instruction from the sensing module not to block the human body sensing signal during the second flush and to continuously monitor the human body signal; 4) When the control module receives a new human body signal from the sensing module, it executes the interruption judgment logic and thereby controls the flushing execution module to stop flushing; 5) After the control module receives the human body signal detected by the sensing module and the human body leaves, it controls the flushing execution module to start the second flush; 6) When multiple people use it continuously, repeat steps 3) to 5).
3. A method for controlling urinal flushing based on dynamic interruption, characterized in that, Includes the following steps: 1) The flushing execution module executes the pre-flushing command, which is issued by the control module after receiving the human body approach signal detected by the sensing module; 2) The flushing execution module initiates the second flushing instruction, which is issued by the control module after receiving the human body departure signal detected by the sensing module; 3) During the second flushing command, the sensing module does not block the human body sensing signal and continues to monitor the human body signal; 4) The flushing execution module executes a command to stop flushing. This command to stop flushing is issued by the control module when the sensing module detects a new human body signal and executes the interrupt determination logic. 5) The flushing execution module executes the second flushing command, which is issued by the control module after the sensing module detects the human body signal leaving; 6) When multiple people use it continuously, repeat steps 3) to 5).
4. The urinal flushing control method based on dynamic interruption according to any one of claims 1-3, characterized in that: The second flushing command in step 5) is issued after a delay of T1, after the sensing module detects the human body signal leaving.
5. The urinal flushing control method based on dynamic interruption according to any one of claims 1-3, characterized in that: The interruption determination logic is based on the "person" signal detected by the sensing module N times consecutively; N is greater than or equal to 1.
6. The urinal flushing control method based on dynamic interruption according to any one of claims 1-3, characterized in that: The interruption determination logic is based on the fact that after the sensing module detects a "person" signal, the control module records that the signal continues for more than a preset time threshold T2; the value of T2 ranges from 0.1 to 2 seconds.
7. The urinal flushing control method based on dynamic interruption according to any one of claims 1-3, characterized in that: The interruption determination logic is based on the signal strength growth rate of the sensing module exceeding a preset strength threshold S1; the range of S1 is 10% / second to 50% / second.
8. The urinal flushing control method based on dynamic interruption according to any one of claims 1-3, characterized in that: The interruption determination logic is based on the fact that the rate of change of distance between the human body and the sensing module exceeds a preset rate threshold V1; the range of V1 is 0.3-1 m / s.
9. The urinal flushing control method based on dynamic interruption according to any one of claims 1-3, characterized in that: The interruption determination logic includes: 1) Based on the "person" signal detected N times consecutively by the sensing module; N is greater than or equal to 1; 2) After the sensing module detects a "person" signal, the control module records that the signal continues for more than a preset time threshold T2; the value of T2 ranges from 0.1 to 2 seconds. 3) The signal strength growth rate of the sensing module exceeds a preset strength threshold S1; the range of S1 is 10% / second to 50% / second; 4) The sensing is achieved based on the rate of change of distance between the human body and the sensing module exceeding a preset rate threshold V1; V1 ranges from 0.3 to 1 meter / second. The specific determination requires that at least two conditions be met.
10. A water-saving control device based on a real-time interruption mechanism, characterized in that: The control method described in any one of claims 1-9 includes a sensing module for real-time detection of human body approach and departure signals; a control module electrically connected to the sensing module; and a flushing execution module electrically connected to the control module, which uses a solenoid valve to perform flushing and water stop operations.