Anti-interference external circulation fan current stabilizer

Abstract

The utility model relates to the technical field of circulating fans, in particular to an anti-interference external circulating fan flow stabilizer which comprises an air inlet assembly, a fan assembly and an air outlet assembly, the air outlet assembly comprises an air outlet barrel, and an anti-interference flow stabilizing mechanism is arranged in the air outlet barrel; the anti-interference flow stabilizing mechanism comprises a mounting ring seat, a circular thick plate is fixedly connected to the inner side of the mounting ring seat, inverted-cone air outlet holes are evenly formed in the circular thick plate, connecting air cylinders are fixedly connected to the small hole ends of the inverted-cone air outlet holes, a plurality of sliding cylinders are installed on the outer wall of the mounting ring seat at equal intervals in the circumferential direction, and locking rods are slidably installed at the outer side ends of the sliding cylinders. A reset spring is fixedly connected between the inner side of the sliding cylinder and the lock rod. According to the anti-interference flow stabilizing mechanism, the large hole end of the inverted conical blowing hole is the circulating blowing end of the external circulating fan, and the small hole end of the inverted conical blowing hole is fixedly connected with the connecting air duct, so that the phenomena of internal airflow turbulence and instability caused by external airflow interference can be effectively prevented.

Description

Technical Field

[0001] This utility model relates to the field of circulating fan technology, and in particular to an anti-interference external circulating fan flow stabilization device. Background Technology

[0002] External circulation fans are widely used in many fields such as industrial production and ventilation.

[0003] However, in actual operation, fans are easily affected by external airflow interference, leading to internal airflow turbulence and unstable phenomena such as eddies and backflow. This not only reduces the fan's efficiency and increases energy consumption but also generates significant noise and shortens the fan's lifespan. Existing flow stabilization devices have relatively simple structures and limited anti-interference capabilities, failing to effectively solve the above problems. Therefore, there is an urgent need for a flow stabilization device for external circulation fans with anti-interference capabilities. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an anti-interference external circulation fan flow stabilization device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An anti-interference external circulation fan flow stabilization device includes an air inlet assembly, a fan assembly, and an air outlet assembly. The air outlet assembly includes an air outlet duct, and an anti-interference flow stabilization mechanism is provided inside the air outlet duct. The anti-interference flow stabilization mechanism includes a mounting ring seat, a circular thick plate is fixedly connected to the inner side of the mounting ring seat, and inverted conical air outlet holes are evenly distributed on the circular thick plate. A connecting air duct is fixedly connected to the small end of each inverted conical air outlet hole. A plurality of sliding cylinders are equidistantly installed on the outer circumference of the outer wall of the mounting ring seat. A locking rod is slidably installed on the outer end of each sliding cylinder, and a return spring is fixedly connected between the inner side of the sliding cylinder and the locking rod.

[0007] Furthermore, a pull rope is fixedly connected to the bottom inner side of the locking rod, and the pull rope slides through to the inner end of the slide cylinder, with a handle fixedly connected to the inner ends of several pull ropes.

[0008] Furthermore, the pull cord is made of durable nylon.

[0009] Furthermore, the air outlet duct is provided with a positioning and mounting hole that is compatible with the locking rod.

[0010] Furthermore, a fourth mounting ring is fixedly connected to the right end of the air outlet duct, and a second dust cover is screwed onto the left end of the air outlet duct. The fan assembly includes an air duct, and a second mounting ring and a third mounting ring are symmetrically fixedly installed on both sides of the air duct. The fourth mounting ring is screwed onto the third mounting ring.

[0011] Furthermore, an external circulation fan is fixedly installed on the inner wall of the air duct.

[0012] Furthermore, the air inlet assembly includes an air inlet flared cone, and a first mounting ring is fixedly installed on the left side end of the air inlet flared cone, the first mounting ring being screwed to a second mounting ring.

[0013] Furthermore, several spiral guide plates are fixedly installed circumferentially on the inner wall of the air inlet flared cone, and a first dust cover is screwed onto the right end of the air inlet flared cone.

[0014] Compared with related technologies, the anti-interference external circulation fan flow stabilization device proposed in this utility model has the following beneficial effects:

[0015] In this utility model, an anti-interference external circulation fan flow stabilization device is described. Through an anti-interference flow stabilization mechanism, multiple inverted conical air outlets are provided in a circular thick plate within the mechanism. The smaller end of each inverted conical air outlet is the air outlet, and the larger end is the circulating air outlet of the external circulation fan. A connecting duct is fixedly connected to the smaller end of each inverted conical air outlet. This effectively prevents external airflow interference, which could lead to internal airflow turbulence, eddies, backflow, and other unstable phenomena, thus ensuring stable operation of the external circulation fan. Furthermore, the entire anti-interference flow stabilization mechanism is locked and positioned on the inner wall of the air outlet duct by a locking rod on the outer side of the mounting ring. The locking rod achieves its locking function through the rebound force provided by a compression spring. Pulling the rope retracts the locking rod to unlock it. This design makes the installation and disassembly of the anti-interference flow stabilization mechanism very convenient, facilitating later maintenance and cleaning, and improving its practicality. Attached Figure Description

[0016] Figure 1 A three-dimensional structural diagram of an anti-interference external circulation fan flow stabilization device proposed in this utility model. Figure 1 ;

[0017] Figure 2 A three-dimensional structural diagram of an anti-interference external circulation fan flow stabilization device proposed in this utility model. Figure 2 ;

[0018] Figure 3 A three-dimensional disassembled structural diagram of the air intake component;

[0019] Figure 4 This is a three-dimensional structural diagram of the wind turbine assembly;

[0020] Figure 5 A three-dimensional disassembled structural diagram of the air outlet component;

[0021] Figure 6 A three-dimensional structural diagram of the anti-interference current stabilization mechanism;

[0022] Figure 7 This is a three-dimensional cross-sectional schematic diagram of the anti-interference current stabilization mechanism.

[0023] In the diagram: 1. Air inlet assembly; 11. Air inlet flared cone cover; 12. First mounting ring; 13. Spiral guide vane; 14. First dust cover; 2. Fan assembly; 21. Air duct; 22. Second mounting ring; 23. Third mounting ring; 24. External circulation fan; 3. Air outlet assembly; 31. Fourth mounting ring; 32. Air outlet duct; 33. Second dust cover; 4. Anti-interference flow stabilizing mechanism; 41. Mounting ring seat; 42. Circular thick plate; 43. Inverted cone air outlet; 44. Connecting air duct; 45. Slide cylinder; 46. Locking rod; 47. Return spring; 48. Pull rope; 49. Pull handle. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Reference Figures 1-7 An anti-interference external circulation fan flow stabilization device includes an air inlet assembly 1, a fan assembly 2, and an air outlet assembly 3. The air outlet assembly 3 includes an air outlet duct 32, and an anti-interference flow stabilization mechanism 4 is provided inside the air outlet duct 32. The anti-interference flow stabilization mechanism 4 includes a mounting ring seat 41, a circular thick plate 42 is fixedly connected to the inner side of the mounting ring seat 41, and inverted conical air outlet holes 43 are evenly distributed on the circular thick plate 42. A connecting air duct 44 is fixedly connected to the small hole end of the inverted conical air outlet hole 43. A plurality of sliding cylinders 45 are equidistantly installed on the outer wall of the mounting ring seat 41. A locking rod 46 is slidably installed on the outer end of the sliding cylinder 45. A return spring 47 is fixedly connected between the inner side of the sliding cylinder 45 and the locking rod 46. A positioning mounting hole adapted to the locking rod 46 is opened inside the air outlet duct 32.

[0026] With the above-mentioned setup, the rebound force provided by the reset spring 47 enables the locking rod 46 to be inserted into the positioning and mounting hole on the inner wall of the air duct 32, thereby realizing the positioning and mounting function of the entire anti-interference flow stabilizing mechanism 4 on the inner wall of the air duct 32.

[0027] In this configuration, a fourth mounting ring 31 is fixedly connected to the right end of the air outlet duct 32, and a second dust cover 33 is screwed onto the left end of the air outlet duct 32. The fan assembly 2 includes an air duct 21, and a second mounting ring 22 and a third mounting ring 23 are symmetrically fixedly installed on both sides of the air duct 21. The fourth mounting ring 31 is screwed onto the third mounting ring 23, and an external circulation fan 24 is fixedly installed on the inner wall of the air duct 21.

[0028] With the above-mentioned setup, when the external circulation fan 24 is started, it can generate an airflow from right to left in the air duct 21, which can be used in many fields such as industrial production and ventilation.

[0029] In this method, the air inlet assembly 1 includes an air inlet flared cone shroud 11. A first mounting ring 12 is fixedly installed on the left side of the air inlet flared cone shroud 11. The first mounting ring 12 is screwed to a second mounting ring 22. Several spiral guide plates 13 are fixedly installed circumferentially on the inner wall of the air inlet flared cone shroud 11. A first dust cover 14 is screwed to the right side of the air inlet flared cone shroud 11.

[0030] With the above-mentioned setup, the air inlet assembly 1, fan assembly 2, and air outlet assembly 3 are installed using a screw-connected assembly method, which facilitates disassembly, transportation, and subsequent disassembly and maintenance. The spiral guide vanes 13 inside the air inlet flared cone shroud 11 have a flared, trumpet-shaped design that guides the external airflow into the device more smoothly, reducing resistance and turbulence when the airflow enters. The spiral guide vanes 13 are distributed in a spiral shape, which can initially guide the incoming airflow, giving the airflow a certain rotational tendency, which is convenient for subsequent rectification operations.

[0031] In this method, a pull rope 48 is fixedly connected to the bottom inner side of the locking rod 46. The pull rope 48 slides through to the inner end of the slide cylinder 45, and a pull handle 49 is fixedly connected to the inner ends of several pull ropes 48.

[0032] With the above-mentioned setup, by pulling the handle 49 outward, several pull ropes 48 can be simultaneously pulled by several locking rods 46 to retract synchronously. This setup facilitates the synchronous unlocking of the locking rods 46 and the disassembly of the anti-interference flow stabilizing mechanism 4 inside the air outlet duct 32.

[0033] In this method, the pull cord 48 is made of durable nylon.

[0034] Through the above-mentioned design, nylon exhibits excellent strength, with high tensile and breaking strength. The resulting ropes can withstand significant tension and are not easily broken, ensuring reliable performance in scenarios such as lifting heavy objects or traction equipment. Furthermore, nylon ropes possess excellent abrasion resistance, exhibiting minimal surface wear even during frequent use and friction with other objects, resulting in a long service life.

[0035] The working principle of the anti-interference external circulation fan flow stabilization device provided by this utility model is as follows:

[0036] During operation, in the airflow input phase, external airflow enters through the air inlet conical shroud 11 of the air inlet assembly 1. The air inlet conical shroud 11 is flared and funnel-shaped; this design guides the external airflow more smoothly into the device, reducing resistance and turbulence during entry. Simultaneously, several spiral guide vanes 13, circumferentially and fixedly installed on the inner wall of the air inlet conical shroud 11, provide initial guidance to the incoming airflow, giving it a certain rotational tendency, laying the foundation for subsequent rectification operations. Furthermore, a first dust cover 14, screwed onto the right end of the air inlet conical shroud 11, effectively prevents external dust and debris from entering the device, ensuring clean airflow.

[0037] Subsequently, the airflow enters the fan assembly 2. The external circulation fan 24, which is fixedly installed on the inner wall of the air duct 21 in the fan assembly 2, starts, and the operation of the external circulation fan 24 generates an airflow from right to left in the air duct 21. The external circulation fan 24 provides power to drive the airflow within the device, meeting the needs of many fields such as industrial production and ventilation.

[0038] Next, the airflow enters the air outlet assembly 3. The anti-interference flow stabilization mechanism 4 installed inside the air outlet duct 32 of the air outlet assembly 3 begins to function. The circular thick plate 42 in the anti-interference flow stabilization mechanism 4 has evenly distributed inverted conical air outlet holes 43. The smaller end of the inverted conical air outlet hole 43 is the air outlet end, and the larger end is the circulating air blowing end of the external circulation fan 24. A connecting duct 44 is fixedly connected to the smaller end of the inverted conical air outlet hole 43. This structural design effectively prevents airflow from being disturbed by external factors, avoids internal airflow turbulence, and prevents the generation of unstable phenomena such as eddies and backflow, thereby making the operation of the external circulation fan 24 more stable. Finally, the airflow stabilized by the anti-interference flow stabilization mechanism 4 is discharged from the air outlet duct 32, completing the entire working process of the external circulation fan flow stabilization device, stably and efficiently achieving ventilation and air exchange functions.

[0039] In this design, the taper angle of the inverted conical air outlet 43 is 15° to 30°, preferably 20°. This taper design effectively reduces the velocity gradient change during airflow, thereby reducing vortex phenomena caused by sudden velocity changes. Furthermore, the length of the connecting duct 44 is 2 to 4 times the diameter of the small hole of the inverted conical air outlet, preferably 3 times. This structural parameter setting further guides the airflow to a smooth output, preventing external airflow from interfering with the entry of the device. The circular thick plate 42 is made of aluminum alloy, with a thickness of 8mm to 12mm, preferably 10mm, ensuring structural strength while also possessing good airflow guiding performance and lightweight characteristics.

[0040] Furthermore, the number of spiral guide vanes 13 is 6 to 12, preferably 8, and they are evenly distributed along the inner wall of the air inlet flare cone shroud 11. The spiral helix angle of the spiral guide vanes 13 is 10° to 20°, preferably 15°. This parameter setting can make the incoming airflow form a stable rotation direction without increasing too much flow resistance, which helps the subsequent rectification operation and improves the overall airflow stability.

[0041] Further explanation of the working principle of the anti-interference flow stabilization mechanism 4: When the external circulation fan 24 is running, the airflow enters through the inlet assembly 1, is pressurized by the fan assembly 2, and then enters the outlet assembly 3. At this time, the airflow enters the anti-interference flow stabilization mechanism 4, passing sequentially through the inverted conical outlet 43 and the connecting duct 44. Since the large end of the inverted conical outlet 43 faces the direction of the fan's airflow, the airflow accelerates here and is evenly discharged through the connecting duct 44. Due to the presence of the inverted conical structure, the airflow pressure gradually decreases and the velocity tends to stabilize during the outlet process, avoiding the backflow and eddy current problems commonly found in traditional straight-through flow stabilization structures.

[0042] Meanwhile, the locking mechanism consisting of the slide cylinder 45, locking rod 46, and return spring 47 located on the outer side of the mounting ring 41 allows the anti-interference flow stabilizing mechanism 4 to be quickly disassembled, replaced, or cleaned via the pull handle 49. The specific operation is as follows: pulling the handle 49 causes the pull rope 48 to simultaneously retract each locking rod 46 into the slide cylinder 45, disengaging it from the positioning mounting holes on the air outlet duct 32; after releasing the handle 49, the locking rod 46 automatically extends and re-engages into the positioning mounting holes under the action of the return spring 47, achieving a secure installation. This locking mechanism has good adaptability and is suitable for frequent disassembly and assembly needs under different working conditions.

[0043] In practical applications, the anti-interference flow stabilization device is also equipped with a pressure sensor (not shown) to monitor changes in airflow pressure inside the air outlet assembly 3 in real time and feed the data back to the control system. The control system adjusts the speed of the external circulation fan 24 according to a preset value to maintain a constant airflow. For example, when airflow disturbance is detected causing pressure fluctuations exceeding ±5%, the control system automatically adjusts the fan frequency to restore the airflow to a stable state, thereby improving the dynamic response capability and anti-interference performance of the entire system.

[0044] Furthermore, both the first dust cover 14 and the second dust cover 33 are made of stainless steel wire mesh with a mesh size of 1mm to 2mm, which effectively blocks dust particles from entering the device without significantly affecting airflow efficiency. The dust covers are connected to their corresponding components via threaded connections, facilitating regular cleaning and maintenance.

[0045] In summary, this utility model, through the setting of a multi-stage flow stabilization structure, a spiral flow guiding element, a detachable flow stabilization module, and an intelligent control system, comprehensively improves the anti-interference capability and operational stability of the external circulation fan, solves the problems of airflow turbulence, high noise, and high energy consumption existing in the prior art, and achieves efficient, low-noise, and long-life operation.

[0046] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A flow stabilizing device for an anti-interference external circulation fan, characterized in that, It includes an air inlet assembly (1), a fan assembly (2) and an air outlet assembly (3). The air outlet assembly (3) includes an air outlet duct (32), and an anti-interference flow stabilizing mechanism (4) is provided inside the air outlet duct (32). The anti-interference flow stabilization mechanism (4) includes a mounting ring seat (41), a circular thick plate (42) is fixedly connected to the inner side of the mounting ring seat (41), and inverted conical air outlet holes (43) are evenly distributed on the circular thick plate (42). A connecting air duct (44) is fixedly connected to the small hole end of the inverted conical air outlet hole (43). Several sliding cylinders (45) are equidistantly installed on the outer wall of the mounting ring seat (41). A locking rod (46) is slidably installed on the outer end of the sliding cylinder (45). A return spring (47) is fixedly connected between the inner side of the sliding cylinder (45) and the locking rod (46).

2. The anti-interference external circulation fan flow stabilization device according to claim 1, characterized in that, A pull rope (48) is fixedly connected to the bottom inner side of the locking rod (46). The pull rope (48) slides through to the inner end of the slide cylinder (45), and a handle (49) is fixedly connected to the inner ends of several pull ropes (48).

3. The anti-interference external circulation fan flow stabilization device according to claim 2, characterized in that, The pull cord (48) is made of durable nylon.

4. The anti-interference external circulation fan flow stabilization device according to claim 1, characterized in that, The air outlet duct (32) has a positioning and mounting hole that matches the locking rod (46) inside.

5. The anti-interference external circulation fan flow stabilization device according to claim 1, characterized in that, The right end of the air outlet duct (32) is fixedly connected to a fourth mounting ring (31), and the left end of the air outlet duct (32) is screwed with a second dust cover (33). The fan assembly (2) includes an air duct (21). The air duct (21) is symmetrically fixed with a second mounting ring (22) and a third mounting ring (23) on both sides. The fourth mounting ring (31) is screwed with the third mounting ring (23).

6. The anti-interference external circulation fan flow stabilization device according to claim 5, characterized in that, An external circulation fan (24) is fixedly installed on the inner wall of the air duct (21).

7. The anti-interference external circulation fan flow stabilization device according to claim 1, characterized in that, The air intake assembly (1) includes an air intake flare cone (11), and a first mounting ring (12) is fixedly installed on the left side end of the air intake flare cone (11). The first mounting ring (12) is screwed to a second mounting ring (22).

8. The anti-interference external circulation fan flow stabilization device according to claim 7, characterized in that, Several spiral guide plates (13) are fixedly installed circumferentially on the inner wall of the air inlet flared cone (11), and a first dust cover (14) is screwed onto the right side end of the air inlet flared cone (11).

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