Industrial intelligent pressure regulating and purifying air cabinet

Abstract

The utility model relates to industrial air purification technical field especially, relates to an industrial intelligent pressure regulating purification air cabinet. Including the control system of electric cabinet, air cabinet body, module, alarm lamp, PLC controller, air pressure transmitter, intelligent touch -sensitive screen, intelligent differential pressure gauge, frequency changer, purification fan, primary efficiency filter screen, medium -efficiency filter screen and high -efficient filter screen etc. component. Adopt the utility model can make the differential pressure stability greatly promote, avoid purification failure, reduce product pollution risk. Meanwhile, through the linkage of PLC controller and frequency changer, realize the dynamic speed regulation of purification fan, avoided the energy waste that traditional air cabinet fan constant speed operation caused, can effectively reduce the power consumption in long -term use, realizes the energy -conserving and benefit -increasing, prolongs the service life of purification fan equipment simultaneously, further reduces the operation cost.

Description

Technical Field

[0001] This utility model relates to the field of industrial air purification technology, and in particular to an intelligent pressure regulating purification air handling unit for industrial use. Background Technology

[0002] In industries such as pharmaceuticals, food, and precision manufacturing, cleanrooms need to maintain a stable positive pressure differential to prevent external contaminants from entering the clean area.

[0003] Traditional air handling units typically use fans with fixed speeds, which cannot dynamically adjust the air volume according to the actual needs of the workshop. This results in large fluctuations in the pressure difference of the clean area, which not only wastes energy but may also cause the clean area to fail, increasing the risk of product contamination. Utility Model Content

[0004] The present invention aims to provide an intelligent pressure-regulating purification air handling unit for industrial use to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An industrial intelligent pressure-regulating purification air handling unit includes an electrical control system and an air handling unit body. The electrical control system is electrically connected to a module, an alarm light, a PLC controller, a pressure transmitter, an intelligent touch screen, and an intelligent differential pressure gauge. The module, alarm light, pressure transmitter, intelligent touch screen, and intelligent differential pressure gauge are each electrically connected to the PLC controller. The module is electrically connected to a frequency converter, and the frequency converter is electrically connected to a purification fan. The air outlet of the purification fan is connected to the air handling unit body. The air handling unit body is sequentially equipped with a primary filter, a medium-efficiency filter, and a high-efficiency filter. There are three intelligent differential pressure gauges and three pressure transmitters. The three intelligent differential pressure gauges are respectively installed on the air ducts on both sides of the primary filter, on the air ducts on both sides of the medium-efficiency filter, and between the clean area and the non-clean area in the purification workshop. The three pressure transmitters are respectively connected to the rear end of the corresponding intelligent differential pressure gauges. The pressure transmitters convert the differential pressure signal into an analog current signal.

[0007] Preferably, the surface of the smart touchscreen is covered with a scratch-resistant tempered glass film.

[0008] Preferably, the alarm light is covered with a transparent protective cover, and the alarm light has three colors: red, yellow, and green.

[0009] Preferably, the smart touchscreen is equipped with a data storage module.

[0010] Preferably, the PLC controller has a built-in PID control algorithm.

[0011] Preferably, the frequency converter is equipped with an overload protection module.

[0012] The beneficial effects of this technical solution compared to existing technologies are as follows:

[0013] (1) This solution uses a PLC controller, frequency converter, air pressure transmitter, and intelligent differential pressure gauges. The three intelligent differential pressure gauges monitor the pressure difference between the two sides of the primary filter and the secondary filter, as well as the pressure difference between the clean and non-clean areas of the cleanroom, and transmit the data to the PLC controller in real time. The corresponding air pressure transmitter converts the pressure difference signal into an analog current signal, providing accurate data support for system adjustment. The PLC controller uses a built-in PID control algorithm to compare the actual pressure difference with the target value and dynamically adjusts the speed of the purification fan through the module control frequency converter. When the pressure difference is too high, the frequency converter reduces the frequency to slow down the purification fan; when the pressure difference is too low, the frequency converter increases the frequency to speed up the purification fan. This closed-loop control, which detects, analyzes, and adjusts, achieves precise matching of air volume, ensures that the pressure difference in the clean area is stable within the set range, solves the core problem of large pressure difference fluctuations in traditional air handling units, greatly improves the pressure difference stability compared to the fixed speed mode, avoids purification failure, and reduces the risk of product contamination. Intelligent differential pressure gauges on both sides of the primary and secondary filters continuously monitor the pressure difference before and after the filters, feeding the data back to the PLC controller and intelligent touchscreen in real time. When dust accumulation on the filters increases resistance and the pressure difference exceeds a preset threshold, the system displays a prompt on the intelligent touchscreen and triggers an alarm light, providing accurate data for cleaning, washing, or replacing the primary and secondary filters. This ensures the filters are always in effective working condition, extending their lifespan and reducing maintenance costs. Secondly, through the linkage between the PLC controller and the frequency converter, the purification fan can dynamically adjust its speed according to actual air pressure requirements, avoiding the energy waste caused by the constant speed operation of traditional air handling unit fans. This effectively reduces power consumption in long-term use, achieving energy saving and efficiency improvement, while extending the lifespan of purification fans and other equipment, further reducing operating costs.

[0014] (2) By setting up a frequency converter and an overload protection module, the frequency converter can adjust the speed of the purification fan according to actual needs, which greatly reduces energy consumption. At the same time, the overload protection module of the frequency converter can monitor the current and temperature of the purification fan in real time. When abnormalities such as motor overload or short circuit occur, the power supply is automatically cut off to avoid equipment damage. The failure rate is effectively reduced compared with traditional air handling units, and the service life of the purification fan is extended.

[0015] (3) By setting up an intelligent touch screen, a scratch-resistant tempered glass screen protector, and a data storage module, the intelligent touch screen can intuitively display real-time data such as wind pressure, air purification fan speed, and energy consumption, and supports convenient setting of target pressure difference and operating parameters; the data storage module can record at least 30 days of operating data, which is convenient for tracing equipment status, analyzing energy consumption trends, and optimizing production plans. The addition of a scratch-resistant tempered glass screen protector extends the service life of the touch screen and ensures long-term stable operation.

[0016] (4) By setting alarm lights, transparent protective covers and three-color status indicators, the transparent protective covers are dustproof and waterproof, ensuring reliability in harsh workshop environments; red, yellow and green correspond to fault, warning and normal status respectively. With the logic judgment of the PLC controller, it can promptly remind maintenance personnel to handle abnormalities and avoid purification failure due to equipment failure.

[0017] (5) By setting up primary, medium and high efficiency filters, gradient purification is formed; the setting of two air pressure transmitters can monitor the pressure difference between adjacent filters respectively. When a certain filter is blocked, the pressure difference in the corresponding range will increase significantly. The PLC controller issues an early warning through the intelligent touch screen and adjusts the speed of the purification fan to compensate for the air pressure, which not only ensures the purification efficiency, but also extends the filter replacement cycle and reduces maintenance costs. Attached Figure Description

[0018] Figure 1 The flowchart provided for this utility model;

[0019] Figure 2 A flowchart illustrating the operation of the electrical cabinet control system provided by this utility model;

[0020] Attached labels: 1. Intelligent differential pressure gauge; 2. Alarm light; 3. PLC controller; 4. Module; 5. Frequency converter; 6. Purification fan; 7. Intelligent touch screen; 8. Air pressure transmitter; 9. Electrical control cabinet. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0022] like Figure 1-2The industrial intelligent pressure regulating purification air handling unit shown includes an electrical control system 9 and the air handling unit body. The electrical control system 9 is electrically connected to a module 4, an alarm light 2, a PLC controller 3, a wind pressure transmitter 8, an intelligent touch screen 7, and an intelligent differential pressure gauge 1, providing power to the module 4, alarm light 2, PLC controller 3, wind pressure transmitter 8, intelligent touch screen 7, and intelligent differential pressure gauge 1 to ensure stable operation of each electrical component. The PLC controller 3 receives signals from the wind pressure detection element and outputs control commands to realize closed-loop regulation of the wind pressure. Module 4, alarm light 2, air pressure transmitter 8, intelligent touch screen 7, and intelligent differential pressure gauge 1 are electrically connected to PLC controller 3. The intelligent touch screen can display parameters such as real-time air pressure, air purification fan 6 speed, and operating status. Module 4 is electrically connected to frequency converter 5, which serves as the communication interface between PLC controller 3 and frequency converter 5, converting the control signals of PLC controller 3 into instructions recognizable by frequency converter 5. Frequency converter 5 is electrically connected to air purification fan 6, adjusting the speed of air purification fan 6 by changing the output frequency to achieve dynamic control of air volume. The air outlet of air purification fan 6 is connected to the air handling unit body. Air purification fan 6 is a centrifugal air purification fan, and its speed is adjusted by frequency converter 5 to control the air volume delivered to the air handling unit. Inside the air handling unit body, along the airflow direction, there are pre-filters, medium-efficiency filters, and high-efficiency filters. The pre-filter intercepts large dust particles, the medium-efficiency filter filters medium-sized impurities, and the high-efficiency filter removes fine particles, ensuring the cleanliness of the output air. Three intelligent differential pressure gauges 1 and three air pressure transmitters 8 are provided. The three intelligent differential pressure gauges 1 are installed on the air ducts on both sides of the primary filter, on both sides of the secondary filter, and between the clean area and the non-clean area in the cleanroom. They can capture the resistance changes before and after the primary filter and the secondary filter, as well as the pressure difference between the clean area and the non-clean area in real time. The three air pressure transmitters 8 are connected to the back end of the corresponding intelligent differential pressure gauges 1. The air pressure transmitters 8 convert the pressure difference signal into an analog current signal, providing a standardized and high-precision electrical signal input for the subsequent analysis and adjustment of the PLC controller 3, ensuring the accuracy and reliability of the data, and laying the foundation for the precise pressure control of the system.

[0023] The intelligent touchscreen 7 has a scratch-resistant tempered glass film on its surface. The alarm light 2 is covered by a transparent protective cover and features three colors: red, yellow, and green. Green indicates normal operation, yellow indicates a warning, and red indicates a fault, providing timely feedback on the system status. The intelligent touchscreen 7 has a data storage module 4 that can record more than 30 days of operating data for easy traceability and analysis. The PLC controller 3 has a built-in PID control algorithm. The frequency converter 5 has an overload protection module 4 that automatically cuts off the power supply when the current of the purification fan 6 is too high or the temperature is too high, preventing equipment damage.

[0024] The specific implementation process is as follows:

[0025] In operation, the purification fan 6 draws outside air into the air handling unit, where it is purified sequentially by primary, secondary, and high-efficiency filters before being delivered to the cleanroom area. Three intelligent differential pressure gauges 1 monitor the pressure difference across the primary and secondary filters, as well as the pressure difference between the clean and non-clean areas of the cleanroom. Three air pressure transmitters 8 convert these pressure difference signals into analog current signals, and all data is synchronously transmitted to the PLC controller 3 via wires. The PLC controller 3 compares the actual pressure difference with the target pressure difference set on the intelligent touchscreen 7, calculates the deviation using its built-in PID control algorithm, and outputs adjustment commands. Finally, module 4, acting as a communication interface, converts the PLC controller 3's commands into electrical signals and transmits them to the frequency converter 5. The frequency converter 5 adjusts the output frequency: if the actual pressure difference is lower than the target value, the frequency converter 5 increases the frequency to speed up the purification fan 6, increasing airflow to raise the air pressure; if the actual pressure difference is higher than the target value, the frequency converter 5 decreases the frequency to slow down the purification fan 6, reducing airflow to lower the air pressure, thus forming a closed-loop control system of detection, analysis, and adjustment.

[0026] When the pressure difference abnormally increases due to blockage of the primary or medium-efficiency filter, the PLC controller 3 triggers the alarm light 2 to flash yellow, and the intelligent touch screen 7 displays the warning information, reminding maintenance personnel to replace the filter.

[0027] If the system experiences a continuous pressure difference deviation or the inverter 5 is overloaded, the alarm light 2 will illuminate red. The PLC controller 3 can then control the inverter 5 to stop via module 4 to prevent equipment damage.

[0028] During normal operation, the alarm light 2 is always on green, the intelligent touch screen 7 updates the operating data in real time, and records information such as wind pressure fluctuations and the speed of the purification fan 6 through the data storage module 4.

[0029] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An industrial intelligent pressure-regulating purification air handling unit, characterized in that: The system includes an electrical control cabinet (9) and a blower body. The electrical control cabinet (9) is electrically connected to a module (4), an alarm light (2), a PLC controller (3), a wind pressure transmitter (8), a smart touch screen (7), and a smart differential pressure gauge (1). The module (4), alarm light (2), wind pressure transmitter (8), smart touch screen (7), and smart differential pressure gauge (1) are electrically connected to the PLC controller (3). The module (4) is electrically connected to a frequency converter (5). The frequency converter (5) is electrically connected to a purification fan (6). The air outlet of the machine (6) is connected to the air handling unit body. The air handling unit body is provided with a primary filter, a medium filter and a high efficiency filter in sequence. There are three intelligent differential pressure gauges (1) and three air pressure transmitters (8). The three intelligent differential pressure gauges (1) are installed on the air ducts on both sides of the primary filter and the air ducts on both sides of the medium filter, as well as between the clean area and the non-clean area in the cleanroom. The three air pressure transmitters (8) are connected to the back end of the corresponding intelligent differential pressure gauges (1). The air pressure transmitters (8) convert the differential pressure signal into an analog current signal.

2. The industrial intelligent pressure regulating purification air handling unit as described in claim 1, characterized in that: The surface of the smart touch screen (7) is covered with a scratch-resistant tempered glass film.

3. The industrial intelligent pressure regulating purification air handling unit as described in claim 1, characterized in that: The alarm light (2) is covered with a transparent protective cover, and the alarm light (2) has three colors: red, yellow and green.

4. The industrial intelligent pressure regulating purification air handling unit as described in claim 1, characterized in that: The smart touch screen (7) is equipped with a data storage module.

5. An industrial intelligent pressure-regulating purification air handling unit as described in claim 1, characterized in that: The PLC controller (3) has a built-in PID control algorithm.

6. The industrial intelligent pressure regulating purification air handling unit as described in claim 1, characterized in that: The frequency converter (5) is equipped with an overload protection module.

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