FFU air duct shunt airflow balancing regulator

Abstract

The utility model discloses a kind of FFU air duct shunt formula airflow balance regulator, it is related to airflow balance regulator field, including FFU fan and the air inlet pipe of FFU fan surface setting;The FFU air duct shunt formula airflow balance regulator is set by setting coarse adjustment mechanism in the side of servo motor A and setting fine adjustment mechanism in the opposite side of inner frame, when detecting that airflow in air duct needs to be adjusted, PLC controller first activates coarse adjustment mechanism, servo motor A drives rotating shaft to drive large blade fast rotation, in the shortest time makes airflow flow close to target value and immediately stops, after airflow state is stable, system automatically starts fine adjustment stage, servo motor B is driven by worm and worm gear drive mechanism to carry out micron level angle adjustment with precision blade group, linkage is realized with the connecting plate of precision blade bottom to drive moving block and realizes multi-blade synchronous fine adjustment, finally realize the flow control precision within small range, to realize the phased adjustment of fast approximation and fine calibration.

Description

Technical Field

[0001] This utility model relates to the field of airflow balance regulators, specifically an FFU duct diversion type airflow balance regulator. Background Technology

[0002] The professional Chinese term for FFU (Fan Filter Unit) is a fan-filter unit, which combines a fan and a filter to form a self-powered end-point purification device. Its working principle is as follows: the fan draws in air from the top of the FFU, filters it through a pre-filter, and then delivers the filtered clean air through the outlet. The fan-filter unit quickly replaces distributed air conditioning units and fan cooling systems. As an end-point purification device for cleanrooms, the FFU has only been available in the Chinese market for a little over a decade. Its modular structure is simple to design and install, easily integrated into existing cleanrooms without extensive renovations. When users need to upgrade the cleanliness of a specific area, there is no need to raise the roof or demolish walls; simply install the FFU unit on top, and only the perimeter of the clean area needs treatment.

[0003] However, FFU fans currently have significant airflow unevenness issues in actual operation. Due to structural design limitations and imperfect airflow organization, it is difficult to achieve uniform air supply to the working surface, resulting in excessively strong or weak airflow in some areas. This unevenness not only reduces the overall air filtration effect and makes it difficult to guarantee the stability of cleanliness, but also causes additional energy waste due to ineffective pressurization in some areas. Utility Model Content

[0004] This invention provides an FFU duct-type airflow balance regulator to solve the problem of significant uneven airflow distribution in the actual operation of existing FFU fans. Due to structural design limitations and imperfect airflow organization, it is difficult to achieve uniform air supply to the working surface, resulting in excessively strong or weak airflow in some areas. This unevenness not only reduces the overall air filtration effect and makes it difficult to guarantee the stability of cleanliness, but also causes additional energy waste due to ineffective pressurization in some areas.

[0005] This utility model provides the following technical solution: an FFU duct diversion-type airflow balance regulator, including an FFU fan and an air inlet pipe disposed on the surface of the FFU fan, further including: an adjustment pipe disposed on one side of the air inlet pipe, a servo motor A threadedly connected to one side of the adjustment pipe, the servo motor A being splined through the output end of the adjustment pipe and connected to a coarse adjustment mechanism, the coarse adjustment mechanism including a rotating shaft and large blades; an inner frame disposed on the inner wall of the adjustment pipe, a fine adjustment mechanism rotatably connected to the opposite side of the inner frame, the fine adjustment mechanism including precision blades, a connecting plate, a moving block, a main rotating rod, a worm gear, a worm wheel and a servo motor B; and a monitoring mechanism disposed on the inner wall of the adjustment pipe, the monitoring mechanism including a wind speed sensor, a PLC controller, a temperature sensor, a differential pressure sensor A and a differential pressure sensor B.

[0006] As a preferred embodiment of this utility model, the rotating shaft is splinedly connected to the output end of the servo motor A through the air inlet pipe, and a large blade is fixedly connected to the surface of the rotating shaft.

[0007] As a preferred technical solution of this utility model, several sets of precision blades are rotatably connected to opposite sides of the inner frame, and a connecting plate is fixedly connected to the bottom of each set of precision blades. A moving block is rotatably connected to one side of the connecting plate. A main rotating rod is fixedly connected to one side of one set of precision blades. A worm gear is fixedly connected to one end of the main rotating rod. A worm wheel is meshed with one side of the worm gear. A servo motor B is fixedly connected to one side of the worm wheel.

[0008] As a preferred embodiment of this utility model, the wind speed sensor is disposed on the inner wall of the regulating tube located behind the precision blade. One side of the wind speed sensor is electrically connected to a PLC controller via a power line. One side of the PLC controller is electrically connected to a temperature sensor, differential pressure sensor A, and differential pressure sensor B via a power line.

[0009] In a preferred embodiment of this invention, the large blade is located in front of the precision blade, and the main rotating rod is connected through the outer wall of the regulating tube.

[0010] As a preferred embodiment of this utility model, the servo motor B is threadedly connected to the top of the regulating tube, and a ventilated motor housing is provided on the surface of the servo motor B. The main rotating rod and the worm gear are both rotatably connected to the inner wall of the ventilated motor housing.

[0011] As a preferred embodiment of this utility model, the temperature sensor is fixedly connected to the inner wall of the regulating tube located in front of the large blade, and the differential pressure sensor A and differential pressure sensor B are respectively fixedly connected to the inner walls of the regulating tube located behind the large blade and behind the precision blade.

[0012] As a preferred embodiment of this utility model, the bottom of the FFU fan is provided with a high-efficiency filter, and the top of the FFU fan is threaded with two sets of handles.

[0013] Compared with the prior art, this utility model provides an FFU duct diversion type airflow balance regulator, which has the following beneficial effects: 1. This FFU duct-type airflow balance regulator, through the setting of a coarse adjustment mechanism on one side of servo motor A and a fine adjustment mechanism on the opposite side of the inner frame, when the airflow in the duct needs adjustment, the PLC controller first activates the coarse adjustment mechanism. Servo motor A drives the shaft to rotate the large blades rapidly, and stops the machine immediately after the airflow approaches the target value in the shortest time. After the airflow stabilizes, the system automatically starts the fine adjustment stage. Servo motor B drives the precision blade group to make micron-level angle adjustments through the worm gear transmission mechanism. The connecting plate at the bottom of the precision blade drives the moving block to achieve synchronous fine adjustment of multiple blades, ultimately achieving flow control accuracy within a small range. This achieves staged adjustment of rapid approximation and fine calibration, effectively eliminating the flow overshoot phenomenon caused by the inertia of moving parts in traditional single-stage adjustment, reducing the response time of the entire adjustment process, and controlling the airflow fluctuation amplitude within a small range, ensuring that the FFU cluster maintains the instantaneous stability of airflow parameters under dynamic operating conditions.

[0014] 2. This FFU duct-type airflow balance regulator, through the monitoring mechanism set on the inner wall of the regulating pipe, collects airflow parameters in real time during system operation through the monitoring mechanism (including differential pressure sensor A at the pressure taps before and after the coarse adjustment mechanism, differential pressure sensor B at the pressure taps before and after the fine adjustment mechanism, temperature sensor, and wind speed sensor). All sensor data are transmitted to the PLC controller through the industrial bus. The PLC controller calculates the actual air volume through the built-in algorithm. When the air volume deviation of a certain FFU fan in the cluster is detected to exceed the set threshold, the servo motor of the coarse adjustment mechanism is first started for rapid compensation. After the system stabilizes, the fine adjustment mechanism is started for fine calibration at a small level. If the air volume deviation is within the allowable range, the fine adjustment mechanism is directly activated to implement micro-adjustment. In this way, by dynamically balancing the air volume output of each FFU node, the problem of uneven airflow organization caused by the structural limitations of traditional systems is effectively solved, and the wind speed fluctuation in the working area is controlled within a small range, significantly improving the airflow uniformity of the clean room. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the coarse adjustment mechanism of this utility model; Figure 3 This is a schematic diagram of the fine-tuning mechanism of this utility model; Figure 4 This is a schematic diagram of the monitoring mechanism of this utility model.

[0016] In the diagram: 1. FFU fan; 2. Inlet duct; 3. Regulating duct; 4. Servo motor A; 5. Coarse adjustment mechanism; 501. Rotating shaft; 502. Large blade; 6. Inner frame; 7. Fine adjustment mechanism; 701. Precision blade; 702. Connecting plate; 703. Moving block; 704. Main rotating rod; 705. Worm gear; 706. Worm wheel; 707. Servo motor B; 8. Monitoring mechanism; 801. Wind speed sensor; 802. PLC controller; 803. Temperature sensor; 804. Differential pressure sensor A; 805. Differential pressure sensor B; 9. Ventilation motor housing; 10. High-efficiency filter; 11. Handle. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-4 This utility model discloses an FFU (Fan Filter Unit) duct diversion type airflow balance regulator, including an FFU fan 1 and an air inlet pipe 2 disposed on the surface of the FFU fan 1. It also includes: an adjustment pipe 3 disposed on one side of the air inlet pipe 2, a servo motor A4 threadedly connected to one side of the adjustment pipe 3, and a coarse adjustment mechanism 5 splinedly connected to the output end of the servo motor A4 through the adjustment pipe 3. The coarse adjustment mechanism 5 includes a rotating shaft 501 and a large blade 502; an inner frame 6 disposed on the inner wall of the adjustment pipe 3, and a fine adjustment mechanism 7 rotatably connected to the opposite side of the inner frame 6. The fine adjustment mechanism 7 includes a precision blade 701, a connecting plate 702, a moving block 703, a main rotating rod 704, a worm gear 705, a worm wheel 706, and a servo motor B707; and a monitoring mechanism 8 disposed on the inner wall of the adjustment pipe 3, which includes a wind speed sensor 801, a PLC controller 802, a temperature sensor 803, a differential pressure sensor A804, and a differential pressure sensor B805.

[0019] Specifically, the rotating shaft 501 is splinedly connected to the output end of the servo motor A4 through the air inlet pipe 2, and a large blade 502 is fixedly connected to the surface of the rotating shaft 501.

[0020] In this implementation scheme, when the system detects that the airflow parameters in the FFU duct deviate from the set value, the PLC controller 802 immediately starts the coarse adjustment mechanism 5. First, it sends a signal to the servo motor A4 to drive the rotating shaft 501 to rotate the large blade 502. By changing the windward area of ​​the large blade 502, the airflow rate is made to quickly approach the target value within a few seconds. When the real-time flow monitoring value enters the preset buffer zone, the PLC controller 802 immediately shuts down the servo motor A4.

[0021] Specifically, several sets of precision blades 701 are rotatably connected to opposite sides of the inner frame 6. Each set of precision blades 701 has a connecting plate 702 fixedly connected to its bottom. A moving block 703 is rotatably connected to one side of the connecting plate 702. A main rotating rod 704 is fixedly connected to one side of one set of precision blades 701. A worm gear 705 is fixedly connected to one end of the main rotating rod 704. A worm wheel 706 is meshed with one side of the worm gear 705. A servo motor B707 is fixedly connected to one side of the worm wheel 706.

[0022] In this implementation scheme, when the system enters the fine-tuning stage, the PLC controller 802 sends a signal to the servo motor B707 to drive the worm gear 706 to rotate. The worm gear 706 meshes and drives the worm 705 to rotate, which in turn drives the precision blade 701 group to perform micron-level angle adjustment. Through the connecting plate 702 at the bottom of the precision blade 701, the moving block 703 is driven to achieve multi-blade synchronous fine-tuning, and finally achieves flow control accuracy within a small range.

[0023] Specifically, the wind speed sensor 801 is located on the inner wall of the regulating tube 3 behind the precision blade 701. One side of the wind speed sensor 801 is electrically connected to the PLC controller 802 via a power line. One side of the PLC controller 802 is electrically connected to the temperature sensor 803, the differential pressure sensor A804, and the differential pressure sensor B805 via a power line.

[0024] In this implementation scheme, during system operation, airflow parameters are collected in real time by the monitoring mechanism 8 distributed on the inner wall of the regulating pipe 3, including differential pressure sensor A804 at the pressure taps before and after the coarse adjustment mechanism 5, differential pressure sensor B805 at the pressure taps before and after the fine adjustment mechanism 7, temperature sensor 803, and wind speed sensor 801. All sensor data are transmitted to the PLC controller 802 through the industrial bus. The PLC controller 802 calculates the actual air volume through the built-in algorithm. When the air volume deviation of a certain FFU fan 1 in the cluster is detected to exceed the set threshold, the servo motor A4 of the coarse adjustment mechanism 5 is first started for rapid compensation. After the system stabilizes, the fine adjustment mechanism 7 is started for fine calibration at a small level. If the air volume deviation is within the allowable range, the fine adjustment mechanism 7 is directly activated to implement micro-adjustment.

[0025] Specifically, the large blade 502 is located in front of the precision blade 701, the main rotating rod 704 is connected through to the outer wall of the regulating tube 3, the servo motor B707 is threaded to the top of the regulating tube 3, the surface of the servo motor B707 is provided with a breathable motor housing 9, and the main rotating rod 704 and the worm gear 706 are both rotatably connected to the inner wall of the breathable motor housing 9.

[0026] In this embodiment, the large blade 502 is located in front of the precision blade 701, which facilitates coarse adjustment followed by fine adjustment. The servo motor B707 is located outside the regulating tube 3 to avoid generating eddy currents and contamination.

[0027] Specifically, temperature sensor 803 is fixedly connected to the inner wall of regulating tube 3 in front of large blade 502, and differential pressure sensor A804 and differential pressure sensor B805 are fixedly connected to the inner walls of regulating tube 3 behind large blade 502 and behind precision blade 701, respectively.

[0028] In this implementation scheme, during system operation, temperature sensor 803 monitors the airflow temperature at the inlet of regulating pipe 3, located 300mm upstream of large blade 502, in real time and transmits the signal to PLC controller 802. During the coarse adjustment stage, differential pressure sensor A804 synchronously collects the pressure difference data of the pressure taps before and after large blade 502. After entering the fine adjustment stage, differential pressure sensor B805 continuously monitors the micro-pressure difference changes on both sides of precision blade 701, and PLC controller 802 dynamically adjusts the airflow based on the data values.

[0029] Specifically, the bottom of the FFU fan 1 is equipped with a high-efficiency filter 10, and the top of the FFU fan 1 is threaded with two sets of handles 11.

[0030] In this implementation scheme, during the operation of FFU fan 1, the high-efficiency filter 10 purifies the airflow entering FFU fan 1, and the two sets of handles 11 facilitate single-person disassembly and assembly operations, making subsequent maintenance convenient.

[0031] The model of temperature sensor 803 is PT100; the model of differential pressure sensor A804 is alpha166; the model of differential pressure sensor B805 is alpha166; the model of PLC controller 802 is S7-1200. The above parameters and models can be selected according to the actual situation.

[0032] The working principle and usage process of this utility model are as follows: When the airflow in the duct needs to be adjusted, the PLC controller 802 first activates the coarse adjustment mechanism 5. The servo motor A4 drives the rotating shaft 501 to rotate the large blade 502 quickly. After the airflow rate approaches the target value in the shortest time, the machine stops immediately. After the airflow state stabilizes, the system automatically starts the fine adjustment mechanism 7. The servo motor B707 drives the precision blade 701 group to perform micron-level angle adjustment through the worm gear 706 and worm 705 transmission mechanism. The connecting plate 702 at the bottom of the precision blade 701 drives the moving block 703 to achieve synchronous fine adjustment of multiple blades, and finally achieves flow control accuracy within a small range.

[0033] During system operation, airflow parameters are collected in real time by the monitoring mechanism 8 distributed on the inner wall of the regulating pipe 3, including differential pressure sensor A804 at the pressure taps before and after the coarse adjustment mechanism 5, differential pressure sensor B805 at the pressure taps before and after the fine adjustment mechanism 7, temperature sensor 803, and wind speed sensor 801. All sensor data are transmitted to the PLC controller 802 through the industrial bus. The PLC controller 802 calculates the actual air volume through the built-in algorithm. When the air volume deviation of a certain FFU fan 1 in the cluster is detected to exceed the set threshold, the servo motor A4 of the coarse adjustment mechanism 5 is first started for rapid compensation. After the system stabilizes, the fine adjustment mechanism 7 is started for fine calibration at a small level. If the air volume deviation is within the allowable range, the fine adjustment mechanism 7 is directly activated to implement micro-adjustment.

[0034] In summary, this FFU duct split-flow airflow balance regulator effectively solves the problem of uneven airflow organization caused by the structural limitations of traditional systems by setting up a coarse adjustment mechanism 5 on one side of the servo motor A4, a fine adjustment mechanism 7 on the opposite side of the inner frame 6, and a monitoring mechanism 8 on the inner wall of the regulating pipe 3. It dynamically balances the airflow output of each FFU node, keeps the airflow fluctuation in the working area within a small range, and significantly improves the airflow uniformity of the cleanroom.

[0035] It should be noted that, in this document, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An FFU (Fan Filter Unit) duct diversion type airflow balance regulator, comprising an FFU fan (1) and an air inlet pipe (2) disposed on the surface of the FFU fan (1), characterized in that, Also includes: An adjusting pipe (3) is provided on one side of the air inlet pipe (2). A servo motor A (4) is threadedly connected to one side of the adjusting pipe (3). The output end of the servo motor A (4) is splined through the adjusting pipe (3) and a coarse adjustment mechanism (5) is connected. The coarse adjustment mechanism (5) includes a rotating shaft (501) and a large blade (502). An inner frame (6) is set on the inner wall of the regulating tube (3). A fine adjustment mechanism (7) is rotatably connected to the opposite side of the inner frame (6). The fine adjustment mechanism (7) includes a precision blade (701), a connecting plate (702), a moving block (703), a main rotating rod (704), a worm gear (705), a worm wheel (706), and a servo motor B (707). The monitoring mechanism (8) is set on the inner side wall of the regulating pipe (3). The monitoring mechanism (8) includes a wind speed sensor (801), a PLC controller (802), a temperature sensor (803), a differential pressure sensor A (804), and a differential pressure sensor B (805).

2. The FFU duct diversion type airflow balance regulator according to claim 1, characterized in that: The rotating shaft (501) is splined to the output end of the servo motor A (4) through the air inlet pipe (2), and a large blade (502) is fixedly connected to the surface of the rotating shaft (501).

3. The FFU duct-type airflow balance regulator according to claim 1, characterized in that: Several sets of precision blades (701) are rotatably connected to opposite sides of the inner frame (6). A connecting plate (702) is fixedly connected to the bottom of each set of precision blades (701). A moving block (703) is rotatably connected to one side of the connecting plate (702). A main rotating rod (704) is fixedly connected to one side of one set of precision blades (701). A worm gear (705) is fixedly connected to one end of the main rotating rod (704). A worm wheel (706) is meshed with one side of the worm gear (705). A servo motor B (707) is fixedly connected to one side of the worm wheel (706).

4. The FFU duct diversion type airflow balance regulator according to claim 1, characterized in that: The wind speed sensor (801) is located on the inner wall of the regulating tube (3) behind the precision blade (701). One side of the wind speed sensor (801) is electrically connected to a PLC controller (802) via a power line. One side of the PLC controller (802) is electrically connected to a temperature sensor (803), a differential pressure sensor A (804), and a differential pressure sensor B (805) via a power line.

5. The FFU duct-type airflow balance regulator according to claim 1, characterized in that: The large blade (502) is located in front of the precision blade (701), and the main rotating rod (704) is connected through the outer wall of the regulating tube (3).

6. The FFU duct split-flow airflow balance regulator according to claim 1, characterized in that: The servo motor B (707) is threaded to the top of the regulating tube (3). The surface of the servo motor B (707) is provided with a breathable motor housing (9). The main rotating rod (704) and the worm gear (706) are both rotatably connected to the inner wall of the breathable motor housing (9).

7. The FFU duct split-flow airflow balance regulator according to claim 6, characterized in that: The temperature sensor (803) is fixedly connected to the inner wall of the regulating tube (3) in front of the large blade (502). The differential pressure sensor A (804) and differential pressure sensor B (805) are respectively fixedly connected to the inner wall of the regulating tube (3) behind the large blade (502) and behind the precision blade (701).

8. The FFU duct split-flow airflow balance regulator according to claim 1, characterized in that: The bottom of the FFU fan (1) is equipped with a high-efficiency filter (10), and the top of the FFU fan (1) is threaded with two sets of handles (11).

Images