Exhaust method for cleaning equipment docking high exhaust duct system

Abstract

The present application relates to the field of exhaust cleaning, and discloses an exhaust method for cleaning equipment butt joint strong exhaust duct system, which comprises the following steps: arranging wind pressure sensors at the inlet, middle section and outlet positions of the exhaust duct; and acquiring real-time wind pressure data at a collection frequency of 1 time per second, so as to accurately and comprehensively monitor the wind pressure change and provide an accurate basis for subsequent wind volume regulation, thereby effectively solving the problem of improper wind volume control caused by inaccurate wind pressure monitoring, and ensuring the stability of the exhaust effect of the cleaning equipment. When the frequency of the exhaust motor is regulated, if the wind pressure of the strong exhaust duct system changes by more than 0.8 kilopascal within 1 second, the control unit can timely shut down the exhaust motor, and restart the exhaust motor after the wind pressure returns to normal, while recording the operating parameters after the recovery. This measure effectively avoids the loss of control of the extracted wind volume caused by the violent fluctuation of the wind pressure, enhances the fault tolerance and stability of the system, further improves the cleaning effect, and guarantees the long-term stable operation of the cleaning equipment.

Description

Technical Field

[0001] This invention relates to the field of information technology, and in particular to the field of exhaust design for cleaning equipment, specifically to an exhaust method for connecting cleaning equipment to a forced exhaust duct system. Background Technology

[0002] A technical challenge exists when connecting cleaning equipment to a forced ventilation system. The air pressure in the workshop and factory's forced ventilation system is unstable, fluctuating significantly, which compromises the cleaning equipment's exhaust performance. Excessive air pressure leads to over-extraction, affecting cleaning effectiveness; conversely, insufficient air pressure results in inadequate extraction, again compromising cleaning efficiency. Furthermore, air pressure fluctuations also affect the stability and reliability of the cleaning process.

[0003] To address this issue, a device with adjustable air extraction volume needs to be designed to adapt to changes in exhaust air pressure in workshops and factories. This device should be able to dynamically adjust the extracted air volume based on cleaning requirements and air pressure changes, achieving precise airflow control. Through precise adjustment of the volume, the stability of the cleaning effect can be ensured even with changes in air pressure, thereby improving cleaning efficiency and quality.

[0004] Achieving volume control requires consideration of several factors. First, a reasonable airflow threshold must be set to ensure that the extracted airflow is within a suitable range. Second, a mapping relationship between air pressure and extracted airflow must be established to achieve dynamic control. Third, a feedback control mechanism needs to be introduced to adjust the extracted airflow in real time based on feedback information about the cleaning effect. Finally, the control device should also have a certain degree of fault tolerance to avoid uncontrolled extraction airflow due to drastic fluctuations in air pressure.

[0005] In summary, the difficulty in controlling the extracted air volume due to unstable air pressure when connecting cleaning equipment to a forced exhaust duct system is a pressing technical problem that needs to be solved. Designing a device that can adjust the extracted air volume, and precisely controlling the value, is key to improving cleaning effectiveness and stability. Summary of the Invention

[0006] The purpose of this invention is to address the above-mentioned deficiencies and provide an exhaust method for connecting cleaning equipment to a forced exhaust duct system. This solves the technical problem in the prior art where the exhaust method of existing cleaning equipment is prone to fluctuations in air pressure and makes it difficult to control the air volume during the exhaust process, thereby affecting the stability and reliability of the cleaning process.

[0007] The objective of this invention is achieved through the following means:

[0008] A method for venting cleaning equipment connected to a forced exhaust duct system, the venting method comprising:

[0009] Real-time air pressure data of the forced exhaust duct system is acquired. Air pressure sensors are placed at the inlet, middle section and outlet of the exhaust duct. The air pressure data is collected once per second and transmitted to the control unit of the cleaning equipment.

[0010] The control unit determines the start and stop conditions of the exhaust fan based on the operating status signal of the feeding mechanism. When it receives the feeding completion signal, the control unit sends the exhaust fan start command and sends the wind speed parameter of 20 meters per second to the speed controller. The speed controller controls the exhaust fan to accelerate from 0 to the rated speed of 3000 revolutions per minute.

[0011] After the exhaust fan reaches its rated speed, the control unit determines whether the current air pressure is within a reasonable range based on the preset air pressure threshold. The air pressure threshold range is set from 0.5 kPa to 2.0 kPa. When the obtained air pressure exceeds the threshold range, the control unit determines the target motor frequency based on the air pressure and exhaust motor frequency mapping table. The initial frequency in the mapping table is 30 Hz. For every 0.1 kPa increase in air pressure, the corresponding motor frequency increases by 2 Hz. The frequency converter dynamically adjusts the actual operating frequency of the exhaust motor in 0.5 Hz adjustment steps to keep the deviation between the actual frequency and the target frequency within ±1 Hz.

[0012] After the wind pressure reaches the standard, the exhaust port on the side of the water baffle ring begins to draw away the cleaning water and air carried by the cleaning plate fixture. The exhaust ports are located at the 3 o'clock and 9 o'clock positions of the water baffle ring, and the top exhaust port directly above the water baffle ring draws away the water and air on the upper side of the water baffle ring.

[0013] The drainage pipe on the back of the cleaning equipment is divided into upper and lower sections. The upper section of the pipe extracts water vapor from the cleaning chamber, while the lower section of the pipe discharges the residual cleaning wastewater to the drain pipe. The drain pipe opens the drain valve when the liquid level is above 80% and closes the drain valve when the liquid level is below 20%. When the liquid level is between 20% and 80%, the drain valve remains in its current state, and the residual water is discharged to the plant pipeline.

[0014] The water vapor drawn from the water baffle ring exhaust port and the back drainage pipe is collected into the water vapor separation device. The water vapor separation device adopts the principle of cyclone separation. It uses centrifugal force generated by a rotation speed of 1000 revolutions per minute to separate the water from the water vapor mixture. The separation efficiency reaches 95%. The separated waste gas is discharged to the plant system through the exhaust fan motor pipeline through the outlet of the water vapor separation device. The separated water is discharged through a dedicated drainage pipe.

[0015] During the frequency adjustment of the exhaust fan motor, if the air pressure of the forced exhaust duct system changes by more than 0.8 kPa within 1 second, the frequency converter cannot complete the motor frequency adjustment. The control unit shuts down the exhaust fan motor. When the air pressure recovers to the range of 0.5 kPa to 2.0 kPa, and the air pressure fluctuation is less than 0.1 kPa for 30 consecutive seconds, the control unit re-acquires the air pressure data to determine whether the air pressure is within a reasonable range. If the air pressure returns to normal, the exhaust fan motor is restarted, and the operating parameters after recovery are recorded.

[0016] The beneficial effects of this invention are:

[0017] By arranging wind pressure sensors at the inlet, middle section, and outlet of the exhaust duct, real-time wind pressure data is acquired at a sampling frequency of once per second. This enables accurate and comprehensive monitoring of wind pressure changes, providing an accurate basis for subsequent airflow control. This effectively solves the problem of improper airflow control caused by inaccurate wind pressure monitoring and ensures the stability of the exhaust effect of the cleaning equipment.

[0018] The control unit controls the start and stop of the exhaust fan based on the operating status signal of the feeding mechanism, which can achieve precise start of the exhaust fan, avoiding unnecessary energy waste and equipment wear. At the same time, when the feeding completion signal is received, the exhaust fan is started with a wind speed of 20 meters per second and a rated speed of 3000 revolutions per minute, ensuring that the cleaning equipment can obtain a suitable exhaust air volume in the initial stage of operation, thus improving the initial stability of the cleaning effect.

[0019] The system presets a wind pressure threshold range of 0.5 kPa to 2.0 kPa and dynamically adjusts the actual operating frequency of the exhaust motor in 0.5 Hz steps based on the wind pressure and exhaust motor frequency mapping table and the frequency converter. This ensures that the deviation between the actual frequency and the target frequency is controlled within ±1 Hz. It can accurately adjust the exhaust motor frequency according to wind pressure changes, thereby achieving precise control of the extracted air volume. This ensures that the extracted air volume of the cleaning equipment is always within a reasonable range under wind pressure fluctuations, effectively avoiding the problem of the cleaning effect being affected by excessive or insufficient air volume, and significantly improving cleaning efficiency and quality.

[0020] The reasonable arrangement of the side and top exhaust ports of the water baffle ring, as well as the division of labor between the upper and lower sections of the drainage pipe on the back of the cleaning equipment, can comprehensively and effectively extract the water vapor and wastewater generated during the cleaning process, ensuring the cleanliness and dryness of the cleaning environment and further improving the cleaning effect.

[0021] The drain pipe controls the opening and closing of the drain valve based on the feedback signal from the liquid level sensor, which can discharge residual cleaning wastewater in a timely and effective manner, avoiding damage to the cleaning equipment caused by wastewater accumulation, and also saving water resources.

[0022] The water-gas separation device adopts the principle of cyclone separation, which generates centrifugal force at a rotation speed of 1000 revolutions per minute to separate water from the water-gas mixture. The separation efficiency reaches 95%, which not only effectively reduces the moisture content in the exhaust gas and reduces the impact on the plant system, but also improves the quality and environmental friendliness of exhaust gas emissions.

[0023] During the frequency adjustment of the exhaust fan motor, if the air pressure of the forced exhaust duct system changes by more than 0.8 kPa within 1 second, the control unit can promptly shut down the exhaust fan motor and restart it after the air pressure returns to normal, while recording the operating parameters after recovery. This measure effectively avoids uncontrolled airflow due to drastic air pressure fluctuations, enhances the system's fault tolerance and stability, and ensures the long-term stable operation of the cleaning equipment. Attached Figure Description

[0024] Figure 1 This is a flowchart illustrating the process of this embodiment; Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] In this embodiment, refer to Figure 1 The specific implementation of the exhaust method for connecting cleaning equipment to a forced exhaust duct system includes:

[0027] Step S101: Obtain real-time air pressure data of the forced exhaust duct system. Air pressure sensors are arranged at the inlet, middle section and outlet of the exhaust duct. The air pressure data acquisition frequency is once per second. The air pressure data is transmitted to the control unit of the cleaning equipment.

[0028] The wind pressure data is collected by wind pressure sensors at the inlet, middle section and outlet of the exhaust duct. The wind pressure data is collected once per second.

[0029] The wind pressure data collected by the wind pressure sensor is transmitted in real time to the control unit of the cleaning equipment through the data transmission module;

[0030] The control unit receives wind pressure data transmitted by the wind pressure sensor and determines whether the wind pressure in the exhaust duct is normal based on the preset wind pressure threshold.

[0031] If the control unit determines that the air pressure in the exhaust duct is abnormal, it sends a cleaning command to the cleaning equipment to start the cleaning operation of the exhaust duct.

[0032] During the cleaning process of the exhaust duct, the control unit continuously receives real-time wind pressure data transmitted by the wind pressure sensor and dynamically monitors the changes in duct wind pressure during the cleaning process.

[0033] After the exhaust duct is cleaned, the control unit determines whether the air pressure in the exhaust duct has returned to normal based on the air pressure data collected by the air pressure sensor.

[0034] If the air pressure in the exhaust duct is normal, the cleaning operation is completed; if the air pressure in the exhaust duct is still abnormal, the control unit will repeat the cleaning command until the air pressure in the exhaust duct returns to normal.

[0035] Optionally, in this embodiment, as an example, PT100 wind pressure sensors are installed at the inlet, middle section, and outlet of the exhaust duct. The sensors have a range of 0-1000Pa and an accuracy of ±5%FS. The wind pressure sensors collect wind pressure data once per second and transmit the collected data in real time to the PLC control unit of the cleaning equipment via an RS485 bus. The control unit has a preset normal wind pressure range of 100-500Pa. If the received wind pressure value is lower than 100Pa or higher than 500Pa, it is determined that the wind pressure in the exhaust duct is abnormal. When an abnormal wind pressure occurs, the control unit sends a 24V high-level signal to the cleaning equipment to trigger the cleaning program. The cleaning equipment uses a high-pressure water gun to flush the inside of the duct at a water pressure of 10MPa and a flow rate of 20L / min. During the cleaning process, the control unit continuously receives wind pressure data and dynamically adjusts the cleaning time and water pressure using a PID algorithm until the wind pressure value returns to the normal range. After cleaning is completed, the control unit compares the air pressure values ​​before and after cleaning. If the air pressure value drops by more than 50Pa, it is determined that the pipeline cleaning effect is good; otherwise, the cleaning continues. This cycle continues until the air pressure in the pipeline is completely restored to normal.

[0036] In step S102, the control unit determines the start / stop conditions of the exhaust fan based on the operating status signal of the feeding mechanism. When the feeding completion signal is received, the control unit issues a start command for the exhaust fan and sends the wind speed parameter of 20 meters per second to the speed controller. The speed controller controls the exhaust fan to accelerate from 0 to the rated speed of 3000 revolutions per minute.

[0037] The control unit acquires the operating status signal of the feeding mechanism to determine whether the feeding mechanism is in the feeding completed state. If the feeding mechanism is in the feeding completed state, the control unit generates an exhaust fan start command and wind speed parameters, and sends the exhaust fan start command and wind speed parameters to the speed controller. After receiving the exhaust fan start command and wind speed parameters sent by the control unit, the speed controller determines the target speed of the exhaust fan based on the wind speed parameters. The speed controller acquires the actual speed of the exhaust fan, compares the actual speed with the target speed, and obtains the speed difference. Based on the speed difference, the speed controller uses a preset PID control algorithm to calculate the speed regulation signal and outputs the speed regulation signal to the frequency converter of the exhaust fan. Under the control of the speed controller, the speed of the exhaust fan gradually increases until it reaches and stabilizes at the preset rated speed.

[0038] Optionally, in this embodiment, as an example, the control unit acquires the operating status signal of the feeding mechanism in real time via an RS485 bus. The status signal of the feeding mechanism is sent by the PLC, and the signal format is 16-bit integer data. After receiving the status signal, the control unit determines whether the third bit of the status signal is 1 through bitwise operations. If it is 1, it indicates that feeding is complete; otherwise, it indicates that feeding is not complete. When it is determined that feeding is complete, the control unit generates an exhaust fan start command. The command content is a 24V DC voltage signal with a duration of 500ms. At the same time, the control unit calculates the corresponding target speed of the exhaust fan (3000 revolutions per minute) based on the preset wind speed parameter of 20 meters per second, and sends the target speed data to the speed controller via the Modbus protocol.

[0039] After receiving the start command and target speed from the control unit, the speed controller obtains the current actual speed of the exhaust fan through a Hall sensor. It compares the actual speed with the target speed to obtain the speed difference. Based on this speed difference, the speed controller uses an incremental PID control algorithm, setting the proportional coefficient Kp = 5, the integral time Ti = 5 seconds, and the derivative time Td = 1 second, to calculate the speed control signal. The speed control signal ranges from 0-10V DC voltage. The speed controller outputs the calculated speed control signal to the frequency converter of the exhaust fan through an analog output module. The frequency converter adjusts the operating frequency of the exhaust fan according to the magnitude of the speed control signal, thereby achieving precise control of the exhaust fan speed. Under the control of the speed controller, the exhaust fan speed gradually increases from 0, and after a 5-second acceleration process, finally reaches and stabilizes at 3000 revolutions per minute.

[0040] In step S103, after the exhaust fan reaches its rated speed, the control unit determines whether the current air pressure is within a reasonable range based on a preset air pressure threshold, which is set from 0.5 kPa to 2.0 kPa. When the obtained air pressure exceeds the threshold range, the control unit determines the target motor frequency according to the air pressure-exhaust motor frequency mapping table. The initial frequency in the mapping table is 30 Hz, and for every 0.1 kPa increase in air pressure, the corresponding motor frequency increases by 2 Hz. The frequency converter dynamically adjusts the actual operating frequency of the exhaust motor in 0.5 Hz adjustment steps to control the deviation between the actual frequency and the target frequency within ±1 Hz.

[0041] The system acquires the real-time speed of the exhaust fan and determines whether it has reached the preset rated speed. If not, it continues to acquire the real-time speed until the rated speed is reached. It also acquires the current air pressure value and compares it with a preset air pressure threshold range to determine if it falls within that range. If the current air pressure value exceeds the threshold range, it retrieves the target motor frequency corresponding to the current air pressure value from a pre-established air pressure-frequency mapping table. The system acquires the actual output frequency of the frequency converter and calculates the frequency deviation between the actual output frequency and the target motor frequency. If the frequency deviation exceeds a preset deviation threshold, it uses a fuzzy control algorithm to determine the adjustment step size and direction of the frequency converter based on the sign of the deviation. Based on the adjustment step size and direction, it controls the frequency converter to dynamically adjust the actual output frequency until the frequency deviation is less than or equal to the deviation threshold. During frequency adjustment, the system continuously acquires the exhaust fan speed and air pressure value. If a preset abnormal change occurs in the speed or air pressure value, an alarm mechanism is triggered, and the speed and air pressure values ​​are displayed in real-time using data visualization technology.

[0042] In step S104, after the air pressure reaches the standard, the exhaust port on the side of the water baffle ring begins to remove the cleaning water and air carried by the cleaning tray fixture. The exhaust ports are located at the 3 o'clock and 9 o'clock positions on the water baffle ring. The top exhaust port directly above the water baffle ring removes the water and air from the upper side of the water baffle ring.

[0043] Acquire real-time wind pressure data from the wind pressure sensor and determine whether the wind pressure has reached the preset standard threshold. If it has reached the preset standard threshold, proceed to the next step; otherwise, continue to acquire real-time wind pressure data from the wind pressure sensor.

[0044] Based on the pre-established three-dimensional model of the water-blocking ring, determine the specific coordinates of the side exhaust ports located at the 3 o'clock and 9 o'clock positions of the water-blocking ring.

[0045] Open the side exhaust ports located at the 3 o'clock and 9 o'clock positions on the water baffle ring. At the same time, start the air extraction device connected to the side exhaust ports to begin extracting the cleaning water vapor carried on the cleaning tray fixture.

[0046] Computer vision technology is used to analyze the surface image of the cleaning tray fixture to determine whether the amount of residual water vapor on the surface of the cleaning tray fixture is lower than a preset threshold. If so, proceed to the next step; otherwise, continue to analyze the surface image of the cleaning tray fixture using computer vision technology.

[0047] Obtain the position coordinates of the vent located directly above the top of the water baffle ring, control the vent to open, and at the same time, start the air extraction device connected to the vent to begin removing the residual water vapor in the upper area of ​​the water baffle ring.

[0048] Infrared thermal imaging technology is used to perform imaging analysis on the upper area of ​​the water-blocking ring. Based on the imaging analysis results, it is determined whether the amount of residual water vapor in the upper area of ​​the water-blocking ring is lower than the preset threshold. If so, proceed to the next step; otherwise, continue to use infrared thermal imaging technology to perform imaging analysis on the upper area of ​​the water-blocking ring.

[0049] If the residual moisture in the areas where the side exhaust port and the top exhaust port are located is lower than the preset threshold, then all exhaust ports will be closed, the air extraction device will stop working, and the process of removing cleaning moisture will be completed.

[0050] In step S105, the drainage pipe on the back of the cleaning equipment is divided into upper and lower sections. The upper section extracts water vapor from the cleaning chamber, while the lower section discharges residual cleaning wastewater to the drain pipe. Based on feedback signals from the liquid level sensor, the drain pipe opens the drain valve when the liquid level is above 80% and closes it when it is below 20%. When the liquid level is between 20% and 80%, the drain valve remains in its current state, discharging the residual water into the plant's maintenance pipeline.

[0051] The system acquires the status information of the upper and lower sections of the discharge pipe of the cleaning equipment to determine whether the upper section is properly extracting water vapor from the cleaning chamber and whether the lower section is properly discharging cleaning wastewater to the drain pipe. It acquires the feedback signal from the liquid level sensor in the drain pipe and determines the current liquid level percentage based on the feedback signal. If the liquid level is higher than a preset 80% threshold, the drain valve is opened to discharge residual water into the plant pipeline; if the liquid level is lower than a preset 20% threshold, the drain valve is closed; if the liquid level is between 20% and 80%, the current state of the drain valve is determined and maintained. Using a machine learning algorithm, based on historical liquid level data and drain valve control data, a correlation model between the liquid level percentage and the drain valve control strategy is established to predict the optimal control strategy for the drain valve under different liquid level conditions. The system acquires the water quality test data of the residual water discharged into the plant pipeline to determine whether the water quality meets the discharge standards. If it does not meet the standards, an alarm signal is issued, prompting secondary treatment. Based on parameters such as the diameter and length of the drainage pipe, a fluid dynamics model is used to calculate the residual water discharge rate and time at different liquid level percentages, in order to optimize drainage efficiency. Strategies such as liquid level control, water quality monitoring, and discharge optimization are integrated into the automatic control system of the cleaning equipment to form a complete cleaning wastewater discharge solution, improving discharge efficiency and water quality compliance.

[0052] Based on the feedback signal from the liquid level sensor, the liquid level in the drain pipe is determined. By setting the liquid level threshold, the opening, closing, and holding conditions of the drain valve are determined, and a control strategy for the residual water volume is obtained. Finally, the wastewater is discharged into the plant pipeline.

[0053] In step S106, the water vapor extracted from the water-blocking ring exhaust port and the rear drainage pipe is collected into the water-gas separator. The water-gas separator uses the principle of cyclone separation, generating centrifugal force through a rotation speed of 1000 revolutions per minute to separate the water from the water-gas mixture, achieving a separation efficiency of 95%. The separated exhaust gas is discharged into the plant system through the exhaust fan motor pipe via the outlet of the water-gas separator, while the separated water is discharged through a dedicated drainage pipe.

[0054] The process involves collecting a water-air mixture from the exhaust port of the water-blocking ring and the back-side drainage pipe, and then transporting the mixture to a water-air separator for processing. The water-air separator, based on a pre-defined cyclone separation principle, uses high-speed rotation to generate centrifugal force, separating the water-air mixture. The process checks if the rotation speed of the water-air separator reaches a preset threshold; if so, proceeding to the next step; otherwise, adjusting the rotation speed to the preset threshold. Based on the separation efficiency parameters of the water-air separator, the separation ratio of the water-air mixture is determined, resulting in separated waste gas and water. The separated waste gas is discharged to the plant system through the outlet of the water-air separator, and the amount and time of discharge are recorded. The separated water is discharged through a dedicated drainage pipe, and the drainage volume and time are recorded, while simultaneously monitoring whether the drainage water quality meets emission standards. Based on the recorded waste gas emission volume, drainage volume, and operating parameters of the water-air separator, a support vector machine algorithm is used to evaluate the operating status of the water-air separator, and the separator is optimized and adjusted based on the evaluation results.

[0055] In step S107, during the frequency adjustment of the exhaust fan motor, if the air pressure of the forced exhaust duct system changes by more than 0.8 kPa within 1 second, the frequency converter cannot complete the motor frequency adjustment, and the control unit shuts down the exhaust fan motor. Once the air pressure recovers to the range of 0.5 kPa to 2.0 kPa, and the air pressure fluctuation is less than 0.1 kPa for 30 consecutive seconds, the control unit re-acquires the air pressure data to determine if the air pressure is within a reasonable range. If the air pressure returns to normal, the exhaust fan motor is restarted, and the operating parameters after recovery are recorded.

[0056] The real-time operating frequency of the exhaust fan motor and the real-time air pressure data of the forced exhaust duct system are obtained, and the real-time operating frequency and real-time air pressure data are transmitted to the control unit.

[0057] The control unit determines whether the change in real-time wind pressure data within a preset time exceeds the wind pressure change threshold based on preset wind pressure change threshold and time threshold.

[0058] If the change exceeds the wind pressure change threshold, the control unit sends a stop command to the frequency converter, the frequency converter stops adjusting the frequency of the exhaust fan motor, and the control unit shuts down the exhaust fan motor.

[0059] After the exhaust fan motor is turned off, the control unit continuously acquires the real-time air pressure data of the forced exhaust duct system to determine whether the real-time air pressure data has returned to the preset normal air pressure range.

[0060] If the real-time wind pressure data returns to the normal wind pressure range, the control unit continues to monitor the fluctuation of the real-time wind pressure data within a preset duration. Based on the preset wind pressure fluctuation threshold, it determines whether the fluctuation of the real-time wind pressure data within the preset duration is less than the wind pressure fluctuation threshold.

[0061] If the fluctuation is less than the wind pressure fluctuation threshold, the control unit obtains the current wind pressure data, compares the current wind pressure data with the normal wind pressure range, and determines whether the current wind pressure data is within the normal wind pressure range.

[0062] If the current wind pressure data is within the normal wind pressure range, the control unit sends a restart command to the frequency converter, the frequency converter restarts the exhaust fan motor, and records the operating frequency of the exhaust fan motor after restarting.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present invention without departing from the scope of the present invention are within the scope of the present invention.

Claims

1. A method for exhausting cleaning equipment connected to a forced exhaust duct system, characterized in that, The exhaust method includes: Step 1: Obtain real-time air pressure data of the forced exhaust duct system. Air pressure sensors are placed at the inlet, middle section and outlet of the exhaust duct. The air pressure data is collected once per second and transmitted to the control unit of the cleaning equipment. Step 2: The control unit determines the start and stop conditions of the exhaust fan based on the operating status signal of the feeding mechanism. When the feeding is completed signal is received, the control unit sends the exhaust fan start command and sends the wind speed parameter of 20 meters per second to the speed controller. The speed controller controls the exhaust fan to accelerate from 0 to the rated speed of 3000 revolutions per minute. Step 3: After the exhaust fan reaches its rated speed, the control unit determines whether the current air pressure is within a reasonable range based on the preset air pressure threshold. The air pressure threshold range is set from 0.5 kPa to 2.0 kPa. When the obtained air pressure exceeds the threshold range, the control unit determines the target motor frequency based on the air pressure and exhaust motor frequency mapping table. The initial frequency in the mapping table is 30 Hz. For every 0.1 kPa increase in air pressure, the corresponding motor frequency increases by 2 Hz. The frequency converter dynamically adjusts the actual operating frequency of the exhaust motor in 0.5 Hz adjustment steps to keep the deviation between the actual frequency and the target frequency within ±1 Hz. Step 4: After the wind pressure reaches the standard, the exhaust port on the side of the water baffle ring begins to draw away the cleaning water and air carried by the cleaning plate fixture. The exhaust ports are located at the 3 o'clock and 9 o'clock positions of the water baffle ring, and the top exhaust port directly above the water baffle ring draws away the water and air on the upper side of the water baffle ring. Step 5: The drainage pipe on the back of the cleaning equipment is divided into upper and lower sections. The upper section of the pipe extracts water vapor from the cleaning chamber, and the lower section of the pipe discharges the residual cleaning wastewater to the drain pipe. According to the feedback signal of the liquid level sensor, the drain pipe opens the drain valve when the liquid level is higher than 80% and closes the drain valve when it is lower than 20%. When the liquid level is between 20% and 80%, the drain valve remains unchanged and the residual water is discharged to the plant pipeline. Step Six: The water vapor extracted from the water baffle ring exhaust port and the back drainage pipe is collected into the water vapor separator. The water vapor separator adopts the principle of cyclone separation. It uses centrifugal force generated by a rotation speed of 1000 revolutions per minute to separate the water from the water vapor mixture. The separation efficiency reaches 95%. The separated waste gas is discharged to the plant system through the exhaust fan motor pipeline through the outlet of the water vapor separator. The separated water is discharged through a dedicated drainage pipe. Step 7: During the frequency adjustment of the exhaust fan motor, if the air pressure of the forced exhaust duct system changes by more than 0.8 kPa within 1 second, the frequency converter cannot complete the motor frequency adjustment. The control unit shuts down the exhaust fan motor. When the air pressure recovers to the range of 0.5 kPa to 2.0 kPa, and the air pressure fluctuation is less than 0.1 kPa for 30 consecutive seconds, the control unit re-acquires the air pressure data to determine whether the air pressure is within a reasonable range. If the air pressure returns to normal, the exhaust fan motor is restarted, and the operating parameters after recovery are recorded.

2. The exhaust method for connecting cleaning equipment to a forced exhaust duct system according to claim 1, characterized in that: In step one, wind pressure data is collected by wind pressure sensors at the inlet, middle section and outlet of the exhaust duct. The wind pressure data is collected once per second. The wind pressure data collected by the wind pressure sensor is transmitted in real time to the control unit of the cleaning equipment through the data transmission module; The control unit receives wind pressure data transmitted by the wind pressure sensor and determines whether the wind pressure in the exhaust duct is normal based on the preset wind pressure threshold. If the control unit determines that the air pressure in the exhaust duct is abnormal, it sends a cleaning command to the cleaning equipment to start the cleaning operation of the exhaust duct. During the cleaning process of the exhaust duct, the control unit continuously receives real-time wind pressure data transmitted by the wind pressure sensor and dynamically monitors the changes in duct wind pressure during the cleaning process. After the exhaust duct is cleaned, the control unit determines whether the air pressure in the exhaust duct has returned to normal based on the air pressure data collected by the air pressure sensor. If the air pressure in the exhaust duct is normal, the cleaning operation is complete. If the air pressure in the exhaust duct is still abnormal, the control unit will repeat the cleaning command until the air pressure in the exhaust duct returns to normal.

3. The exhaust method for connecting cleaning equipment to a forced exhaust duct system according to claim 1, characterized in that: In step two, the control unit acquires the operating status signal of the feeding mechanism and determines whether the feeding mechanism is in the feeding completed state. If the feeding mechanism is in the feeding completed state, the control unit generates the exhaust fan start command and wind speed parameters, and sends the exhaust fan start command and wind speed parameters to the speed controller; After receiving the exhaust fan start command and wind speed parameters sent by the control unit, the speed controller determines the target speed of the exhaust fan based on the wind speed parameters; The speed controller obtains the actual speed of the exhaust fan, compares the actual speed with the target speed, and obtains the speed difference. The speed controller calculates the speed regulation signal based on the speed difference using a preset PID control algorithm, and outputs the speed regulation signal to the frequency converter of the exhaust fan. Under the control of the speed regulator, the speed of the exhaust fan gradually increases until it reaches and stabilizes at the preset rated speed.

4. The exhaust method for connecting cleaning equipment to a forced exhaust duct system according to claim 1, characterized in that: In step three, the real-time speed of the exhaust fan is obtained, and a judgment is made. If the real-time speed has not reached the preset rated speed, continue to acquire the real-time speed until the rated speed is reached. Obtain the current wind pressure value, compare the current wind pressure value with the preset wind pressure threshold range, and determine whether the current wind pressure value is within the wind pressure threshold range; If the current wind pressure value exceeds the wind pressure threshold range, the target motor frequency corresponding to the current wind pressure value is obtained from the pre-established wind pressure-frequency mapping table. Obtain the actual output frequency of the inverter and calculate the frequency deviation between the actual output frequency and the target motor frequency; If the frequency deviation exceeds the preset deviation threshold, the fuzzy control algorithm is used to determine the adjustment step size and adjustment direction of the frequency converter based on the sign of the frequency deviation. Based on the adjustment step size and adjustment direction, the frequency converter is controlled to dynamically adjust the actual output frequency until the frequency deviation is less than or equal to the deviation threshold. During frequency adjustment, the speed and air pressure values ​​of the exhaust fan are continuously acquired. If the speed or air pressure value changes abnormally according to a preset time, an alarm mechanism is triggered, and the speed and air pressure values ​​are displayed in real time through data visualization technology.

5. The exhaust method for connecting cleaning equipment to a forced exhaust duct system according to claim 1, characterized in that: In step four, real-time wind pressure data from the wind pressure sensor is obtained, and it is determined whether the wind pressure has reached the preset standard threshold. If it has reached the preset standard threshold, the next step is executed; otherwise, real-time wind pressure data from the wind pressure sensor is obtained again. Based on the pre-established three-dimensional model of the water-blocking ring, determine the specific coordinates of the side exhaust ports located at the 3 o'clock and 9 o'clock positions of the water-blocking ring. Open the side exhaust ports located at the 3 o'clock and 9 o'clock positions on the water baffle ring. At the same time, start the air extraction device connected to the side exhaust ports to begin extracting the cleaning water vapor carried on the cleaning tray fixture. Computer vision technology is used to analyze the surface image of the cleaning tray fixture to determine whether the amount of residual water vapor on the surface of the cleaning tray fixture is lower than a preset threshold. If so, proceed to the next step; otherwise, continue to analyze the surface image of the cleaning tray fixture using computer vision technology. Obtain the position coordinates of the vent located directly above the top of the water baffle ring, control the vent to open, and at the same time, start the air extraction device connected to the vent to begin removing the residual water vapor in the upper area of ​​the water baffle ring. Infrared thermal imaging technology is used to perform imaging analysis on the upper area of ​​the water-blocking ring. Based on the imaging analysis results, it is determined whether the amount of residual water vapor in the upper area of ​​the water-blocking ring is lower than the preset threshold. If so, proceed to the next step; otherwise, continue to use infrared thermal imaging technology to perform imaging analysis on the upper area of ​​the water-blocking ring. If the residual moisture in the areas where the side exhaust port and the top exhaust port are located is lower than the preset threshold, then all exhaust ports will be closed, the air extraction device will stop working, and the process of removing cleaning moisture will be completed.

6. The exhaust method for connecting cleaning equipment to a forced exhaust duct system according to claim 1, characterized in that: In step five, the status information of the upper and lower sections of the discharge pipe of the cleaning equipment is obtained to determine whether the upper section is normally extracting water vapor from the cleaning chamber and whether the lower section is normally discharging cleaning wastewater to the drain pipe. Obtain the feedback signal from the liquid level sensor in the drain pipe, and determine the current liquid level percentage based on the feedback signal; If the liquid level is higher than the preset 80% threshold, the drain valve will be opened to discharge the residual water into the plant pipeline. If the liquid level is lower than the preset 20% threshold, the drain valve will be closed. If the liquid level is between 20% and 80%, determine the current state of the drain valve and maintain that state. By using machine learning algorithms, a correlation model between liquid level percentage and drain valve control strategy is established based on historical liquid level data and drain valve control data. This model is used to predict the optimal control strategy for the drain valve under different liquid level conditions. Obtain water quality test data of residual water discharged into the plant pipeline, determine whether the water quality meets the discharge standards, and if not, issue an alarm signal to prompt secondary treatment; Based on the diameter and length parameters of the drainage pipe, a fluid dynamics model is used to calculate the residual water discharge rate and discharge time at different liquid level percentages, in order to optimize the drainage efficiency. By integrating liquid level control, water quality detection, and discharge optimization strategies into the automatic control system of the cleaning equipment, a complete cleaning wastewater discharge solution is formed, improving discharge efficiency and water quality compliance. It also includes: judging the liquid level in the drain pipe based on the feedback signal of the liquid level sensor, determining the opening, closing and holding conditions of the drain valve by setting the liquid level threshold, obtaining the control strategy for residual water volume, and finally discharging the wastewater into the plant pipeline.

7. The exhaust method for connecting cleaning equipment to a forced exhaust duct system according to claim 1, characterized in that: In step six, the water-gas mixture extracted from the water-blocking ring exhaust port and the back drainage pipe is obtained, and the water-gas mixture is transported to the water-gas separator for processing. The water-air separation device separates the water-air mixture by generating centrifugal force through high-speed rotation based on the preset cyclone separation principle. Determine whether the rotational speed of the water-air separator has reached the preset threshold. If it has, proceed to the next step. Otherwise, adjust the rotation speed to the preset threshold; Based on the separation efficiency parameters of the water-gas separator, the separation ratio of the water-gas mixture is determined, and the separated waste gas and water are obtained. The separated waste gas is discharged to the plant system through the outlet of the water-gas separator, and the amount of waste gas discharged and the discharge time are recorded. The separated water is discharged through a dedicated drainage pipe, and the drainage volume and time are recorded. At the same time, the quality of the discharged water is monitored to ensure that it meets the discharge standards. Based on the recorded exhaust gas emissions and drainage volume, as well as the operating parameters of the water-gas separator, the operating status of the water-gas separator is evaluated using a support vector machine algorithm, and the water-gas separator is optimized and adjusted based on the evaluation results.

8. The exhaust method for connecting cleaning equipment to a forced exhaust duct system according to claim 1, characterized in that: In step seven, the real-time operating frequency of the exhaust fan motor and the real-time air pressure data of the forced exhaust duct system are obtained, and the real-time operating frequency and real-time air pressure data are transmitted to the control unit. The control unit determines whether the change in real-time wind pressure data within a preset time exceeds the wind pressure change threshold based on preset wind pressure change threshold and time threshold. If the change exceeds the wind pressure change threshold, the control unit sends a stop command to the frequency converter, the frequency converter stops adjusting the frequency of the exhaust fan motor, and the control unit shuts down the exhaust fan motor. After the exhaust fan motor is turned off, the control unit continuously acquires the real-time air pressure data of the forced exhaust duct system to determine whether the real-time air pressure data has returned to the preset normal air pressure range. If the real-time wind pressure data returns to the normal wind pressure range, the control unit continues to monitor the fluctuation of the real-time wind pressure data within a preset duration. Based on the preset wind pressure fluctuation threshold, it determines whether the fluctuation of the real-time wind pressure data within the preset duration is less than the wind pressure fluctuation threshold. If the fluctuation is less than the wind pressure fluctuation threshold, the control unit obtains the current wind pressure data, compares the current wind pressure data with the normal wind pressure range, and determines whether the current wind pressure data is within the normal wind pressure range. If the current wind pressure data is within the normal wind pressure range, the control unit sends a restart command to the frequency converter, the frequency converter restarts the exhaust fan motor, and records the operating frequency of the exhaust fan motor after restarting.

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