Ventilation pipe and fan connecting structure and connecting method thereof

Abstract

The invention relates to the technical field of ventilation equipment, in particular to a ventilation pipe and draught fan connecting structure and a connecting method thereof.The ventilation pipe and draught fan connecting structure comprises a self-cleaning connecting mechanism installed between a ventilation pipe and a fresh air ventilator, and the self-cleaning connecting mechanism comprises an assembled flow guide shell, an airflow transmission seat, an annular filtering layer, a positioning cleaning piece and a wind power testing piece; the air inlet end of the assembled flow guide shell is connected with the fresh air machine, and the air outlet end of the assembled flow guide shell is connected with the ventilation pipe. The airflow transmission seat is mounted in the assembled flow guide shell, and the airflow transmission seat further comprises a rotating resistance piece mounted on the assembled flow guide shell; the annular filter layer is mounted on the airflow transmission seat; the positioning cleaning piece is mounted between the airflow transmission seat and the annular filter layer, and the cleaning surface of the positioning cleaning piece is attached to the outer wall of the annular filter layer; according to the wind power testing mechanism, the maintenance convenience can be effectively improved, and meanwhile, the service life of the mechanism is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of ventilation equipment, and in particular to a ventilation pipe and fan connection structure and a connection method thereof. Background Art

[0002] At present, for highly closed indoor environments, there will be insufficient fresh air volume and low indoor oxygen concentration. Therefore, fresh air fans used for ventilation are becoming more and more popular.

[0003] Chinese patent number CN109323356B discloses a ventilation pipe assembly and a fresh air blower having the same, the ventilation pipe assembly is used to be installed on the wall and connected to the fresh air blower body, the ventilation pipe assembly includes: a pipe body, the pipe body is used to be installed on the wall and connected to the fresh air blower body located outdoors or drawn out from the wall; a filter device, used to filter the fresh air in the shell of the fresh air blower body, the filter device is a tubular structure, the filter device is arranged on the pipe body, so that the filter device is installed on the wall with the pipe body or drawn out from the wall; a connector, the connector is arranged at the end of the pipe body, the filter device is connected to the connector, so that the filter device can be detachably arranged on the pipe body through the connector. The technical solution provided by the device can solve the technical problem that it is not convenient to disassemble and wash the filter device of the fresh air blower in the prior art.

[0004] Although the above technical solution can disassemble the filter device, during the replacement process, whenever the filter device needs to be replaced, the user not only needs to enter a relatively narrow or inconvenient space, but also needs to completely pull out the pipe body connected to the fresh air fan body from the wall installation position and separate it from the fresh air fan body before reaching and replacing the internal filter device. This series of steps is not only time-consuming and labor-intensive, but also increases maintenance costs. Frequent disassembly and assembly may also cause the sealing of the pipe body to decrease, affecting the overall performance of the system. In addition, the core filter element of the existing filter device is mostly an air filter layer. Although it can effectively block dust, particles and other pollutants in the air to a certain extent, its filter surface is very easy to accumulate dust during use, resulting in a gradual decrease in filtration efficiency and even blockage. This blockage not only limits the air circulation and seriously affects the ventilation effect, but may also breed bacteria and mold due to poor air flow, which in turn causes secondary pollution to the indoor air quality. Summary of the invention

[0005] In view of the above problems, a ventilation duct and fan connection structure and a connection method thereof are provided, which can effectively improve the convenience of maintenance through a self-cleaning connection mechanism and at the same time increase the service life of the mechanism.

[0006] In order to solve the problems of the prior art, the present invention provides a ventilation duct and fan connection structure, including a self-cleaning connection mechanism installed between the ventilation duct and the fresh air fan, the self-cleaning connection mechanism including an assembled guide shell, an airflow transmission seat, an annular filter layer, a positioning cleaning piece and a wind force testing piece; the assembled guide shell is installed on the wall, the air inlet end of the assembled guide shell is connected to the fresh air fan, and the air outlet end of the assembled guide shell is connected to the ventilation duct; the airflow transmission seat is installed inside the assembled guide shell, the airflow transmission seat also includes a rotational resistance piece installed on the assembled guide shell, and the rotational resistance piece is used to increase the rotational resistance of the airflow transmission seat; the annular filter layer is installed on the airflow transmission seat; the positioning cleaning piece is installed between the airflow transmission seat and the annular filter layer, and the cleaning surface of the positioning cleaning piece is in contact with the outer wall of the annular filter layer; the wind force testing piece is installed on the air outlet end of the assembled guide shell.

[0007] Preferably, the assembled air guide shell consists of a fixed mounting shell and an assembled mounting shell, an air inlet guide rail is installed on the top of the fixed mounting shell, an air outlet guide rail is provided on the side of the fixed mounting shell away from the air inlet guide rail, pipe mouth connecting mechanisms are installed on the air outlet guide rail and the air inlet guide rail, a mounting slot is provided on the side of the fixed mounting shell, an interlaced mounting slot is provided on the side of the fixed mounting shell away from the mounting slot, a limiting guide column is slidably installed between the assembled mounting shell and the fixed mounting shell, a clamping slot is also provided on the side of the assembled mounting shell, a discharge port is installed on the bottom of the assembled mounting shell, a collecting box is also installed on the bottom of the assembled mounting shell, and a clamping mechanism is installed on the mounting slot.

[0008] Preferably, the pipe mouth connection mechanism includes a conical joint installed on the assembled guide shell, the outer wall of the conical joint is distributed with a plurality of adaptive step surfaces, and the pipe mouth connection mechanism also includes a binding tie for fixing the ventilation pipe.

[0009] Preferably, the clamping mechanism comprises a movable clamping hook slidably mounted inside the mounting clamping slot, a first return spring is mounted between the movable clamping hook and the mounting clamping slot, and a movable paddle is provided on the side of the movable clamping hook.

[0010] Preferably, the airflow transmission seat is rotatably mounted on the assembled mounting shell, a plurality of mounting guide columns are provided on the airflow transmission seat, and a plurality of airflow blades are provided on the airflow transmission seat.

[0011] Preferably, the rotation resistance member comprises an adjustment mounting seat fixedly mounted on the assembly mounting shell, a rotation connection block is rotatably mounted inside the adjustment mounting seat, and one end of the rotation connection block is connected to the airflow transmission seat.

[0012] Preferably, a limit mounting rail is provided on the adjustment mounting seat, an adjustment slider is installed inside the limit mounting rail, a threaded adjustment rod is also installed on the limit mounting rail, the threaded adjustment rod is threadedly connected to the adjustment slider, and a friction resistance block is also slidably installed on the limit mounting rail, friction teeth are provided on the friction resistance block, and a push spring is installed between the friction resistance block and the adjustment slider.

[0013] Preferably, the positioning and cleaning component includes a mounting plate mounted on a fixed mounting shell, a plurality of positioning support plates and cleaning plates are provided on the mounting plate, the positioning support plates and the cleaning plates extend through interlaced mounting grooves toward the airflow transmission seat, a plurality of sliding balls are provided on the positioning support plate and the cleaning plate, a plurality of cleaning strips are provided on the cleaning plate, and a plurality of blanking holes are also provided on the cleaning plate.

[0014] Preferably, the wind test piece includes a transparent mounting shell installed on the air outlet guide rail, a movable detection block is slidably installed inside the transparent mounting shell, a wind blocking plate is provided on the movable detection block, and a pressure measuring spring is installed between the movable detection block and the transparent mounting shell.

[0015] A method for connecting a ventilation pipe and a fan connecting structure comprises the following steps:

[0016] S1. Fix the assembled air guide shell to the wall, connect the air inlet end of the assembled air guide shell to the fresh air fan, and connect the air outlet end of the assembled air guide shell to the ventilation pipe.

[0017] S2. Install the airflow transmission seat in the shell to ensure its free rotation, install the rotation resistance member, and adjust the positioning resistance according to the air volume to optimize the airflow distribution.

[0018] S3. Install the annular filter layer on the airflow transmission seat.

[0019] S4. Start the fresh air fan, and the air passes through the air flow transmission seat and the annular filter layer in turn, and finally enters the ventilation.

[0020] S5. Use a wind test piece to monitor the air circulation effect at the air outlet and evaluate the ventilation performance of the annular filter layer based on the readings.

[0021] S6. After the annular filter layer is dusted, the airflow drives the rotating seat to rotate, so that the annular filter layer (5) rubs against the positioning cleaning member to clean the dust.

[0022] S7. Regularly check the wind test pieces, annular filter layers and positioning cleaning pieces, and perform necessary maintenance and replacement.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention achieves optimized control of airflow distribution by introducing a combined design of an airflow transmission seat and a rotating resistance member. By adjusting the rotating resistance member, the rotation force of the airflow transmission seat can be accurately controlled. When dust accumulates on the surface of the annular filter layer and causes the airflow to be blocked, the airflow transmission seat can automatically rotate, driving the annular filter layer to rotate together, so that the unblocked filter surface moves to the circulation position, thereby ensuring the air flow rate. The friction between the positioning cleaning member and the annular filter layer effectively cleans the dust on the surface of the annular filter layer, improves the filtration efficiency, and extends the service life of the annular filter layer. At the same time, by reasonably regulating the rotation force of the airflow transmission seat, excessive friction and wear between the annular filter layer and the positioning cleaning member can be effectively avoided.

[0025] 2. The present invention uses a wind test piece to enable the present invention to monitor and evaluate the air circulation effect in real time. By observing the readings of the wind test piece, maintenance personnel can intuitively understand the working status of the annular filter layer and the overall performance of the ventilation system. This not only helps to discover and solve problems in a timely manner, but also guides maintenance personnel to perform targeted maintenance and adjustments, thereby ensuring the continuous and efficient operation of the ventilation system.

[0026] 3. The present invention adopts the design of assembled flow guide shell, which makes the installation and disassembly process simpler and faster. At the same time, since the airflow transmission seat, annular filter layer, positioning cleaning parts and wind force test parts are all integrated in the assembled flow guide shell, the whole structure is compact and easy to maintain. This not only reduces the need for maintenance personnel to enter narrow or inconvenient operating spaces, but also avoids the problem of decreased sealing of the tube body caused by frequent disassembly and assembly, thereby reducing maintenance costs and improving the overall performance and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the installation of a ventilation duct and fan connection structure of the present invention.

[0028] Figure 2 This is a three-dimensional schematic diagram of a ventilation pipe and fan connection structure of the present invention. Figure 1 .

[0029] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0030] Figure 4 This is a three-dimensional schematic diagram of a ventilation pipe and fan connection structure of the present invention. Figure 2 .

[0031] Figure 5 It is a planar cross-sectional stereoscopic diagram of a ventilation duct and fan connection structure of the present invention.

[0032] Figure 6 yes Figure 5A partial enlarged view of point B in the middle.

[0033] Figure 7 yes Figure 5 A partial enlarged view of point C in the middle.

[0034] Figure 8 It is a three-dimensional schematic diagram of a positioning cleaning component in a ventilation pipe and fan connection structure of the present invention.

[0035] Fig. 9 It is a three-dimensional schematic diagram of a wind force test piece in a ventilation duct and fan connection structure of the present invention.

[0036] Fig.10 It is a planar cross-sectional view of a ventilation duct and fan connection structure of the present invention.

[0037] The numbers in the figure are:

[0038] 1. Ventilation duct; 2. Fresh air blower; 3. Assembled guide housing; 31. Pipe connection mechanism; 311. Conical joint; 312. Adaptive step surface; 313. Binding tie; 32. Fixed installation housing; 321. Air inlet guide rail; 322. Installation slot; 323. Air outlet guide rail; 33. Assembled installation housing; 331. Snap-on slot; 332. Discharge port; 34. Limiting guide column; 35. Collection box; 36. Active hook; 37. First reset spring; 38. Active paddle; 4. Air flow transmission seat; 41. Rotation resistance member; 411. Adjustment Mounting seat; 4111, limit mounting rail; 4112, adjustment slider; 4113, threaded adjustment rod; 4114, friction block; 4115, push spring; 412, rotating connection block; 42, mounting guide column; 43, air flow blade; 5, annular filter layer; 6, positioning cleaning piece; 61, mounting plate; 62, positioning support plate; 63, cleaning plate; 631, cleaning strip; 64, sliding ball; 7, wind test piece; 71, transparent mounting shell; 72, movable detection block; 721, wind block plate; 73, pressure measuring spring; 8, wall. DETAILED DESCRIPTION

[0039] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0040] See also Figures 1 to 10As shown, a ventilation pipe and fan connection structure includes a self-cleaning connection mechanism installed between the ventilation pipe 1 and the fresh air fan 2, the self-cleaning connection mechanism includes an assembled guide shell 3, an air flow transmission seat 4, an annular filter layer 5, a positioning cleaning piece 6 and a wind force test piece 7; the assembled guide shell 3 is installed on the wall 8, the air inlet end of the assembled guide shell 3 is connected to the fresh air fan 2, and the air outlet end of the assembled guide shell 3 is connected to the ventilation pipe 1; the air flow transmission seat 4 is installed inside the assembled guide shell 3, the air flow transmission seat 4 also includes a rotation resistance piece 41 installed on the assembled guide shell 3, and the rotation resistance piece 41 is used to increase the rotation resistance of the air flow transmission seat 4; the annular filter layer 5 is installed on the air flow transmission seat 4; the positioning cleaning piece 6 is installed between the air flow transmission seat 4 and the annular filter layer 5, and the cleaning surface of the positioning cleaning piece 6 is in contact with the outer wall of the annular filter layer 5; the wind force test piece 7 is installed on the air outlet end of the assembled guide shell.

[0041] The assembled flow guide shell 3 is first firmly installed on the wall 8 as an intermediary structure between the fresh air system and the ventilation duct 1. The air inlet end of the assembled flow guide shell 3 is directly connected to the fresh air fan 2, while the air outlet end is connected to the ventilation duct 1, ensuring that the fresh air can smoothly enter the indoor ventilation system through this connection structure. The airflow transmission seat 4 is installed inside the assembled flow guide shell 3. The rotation resistance member 41 is used to adjust and increase the rotation resistance of the airflow transmission seat 4. The rotation resistance member 41 allows the staff to control the rotation force of the airflow transmission seat 4 by adjusting the rotation resistance member 41 according to the air volume of the fresh air fan 2, thereby optimizing the distribution and filtering effect of the airflow. The annular filter layer 5 is installed on the airflow transmission seat 4 to filter the incoming airflow and effectively block pollutants such as dust and particles in the air.

[0042] When air passes through the assembled flow guide housing 3, it first passes through the air flow transmission seat 4, then passes through the filtration of the annular filter layer 5, and finally flows out from the air outlet end of the assembled flow guide housing 3 and enters the ventilation pipe 1. As time goes by, dust will accumulate on the surface of the annular filter layer 5, affecting the filtration efficiency. At this time, due to the obstruction of the circulating air, the air flow will diffuse along the outside of the annular filter layer 5, generating additional thrust. When this thrust is large enough, it will overcome the resistance of the rotation resistance member 41, causing the air flow transmission seat 4 to start rotating. The rotation of the air flow transmission seat 4 will drive the annular filter layer 5 to rotate together, so that the unblocked filter surface moves to a suitable circulation position to ensure that the air can continue to circulate. At the same time, the annular filter layer 5 will rub against the positioning cleaning member 6 during the rotation process, and the cleaning surface of the positioning cleaning member 6 will fit the outer wall of the annular filter layer 5, thereby effectively cleaning off the dust on the surface of the annular filter layer 5 and ensuring the filtration effect.

[0043] The wind force test piece 7 is installed at the air outlet end of the assembled guide housing 3 to monitor and evaluate the air circulation effect in real time. Maintenance personnel can understand the working status of the annular filter layer 5 and the overall performance of the ventilation system by observing the readings of the wind force test piece 7, so as to perform maintenance and adjustments in time. The device realizes the self-cleaning function, effectively prolongs the service life of the annular filter layer 5, and improves the overall performance and efficiency of the ventilation system.

[0044] See also Figures 1 to 10 As shown, the assembled air guide shell 3 is composed of a fixed mounting shell 32 and an assembled mounting shell 33, an air inlet guide rail 321 is installed on the top of the fixed mounting shell 32, an air outlet guide rail 323 is provided on the side of the fixed mounting shell 32 away from the air inlet guide rail 321, a pipe mouth connecting mechanism 31 is installed on the air outlet guide rail 323 and the air inlet guide rail 321, a mounting slot 322 is provided on the side of the fixed mounting shell 32, an interlaced mounting slot is provided on the side of the fixed mounting shell 32 away from the mounting slot 322, a limiting guide column 34 is slidably installed between the assembled mounting shell 33 and the fixed mounting shell 32, a clamping slot 331 is also provided on the side of the assembled mounting shell 33, a discharge port 332 is installed on the bottom of the assembled mounting shell 33, a collecting box 35 is also installed on the bottom of the assembled mounting shell 33, and a clamping mechanism is installed on the mounting slot 322.

[0045] An air inlet guide rail 321 is provided on the top of the fixed installation shell 32 for guiding the airflow of the fresh air blower 2 to enter, and an air outlet guide rail 323 is provided on the side away from the air inlet guide rail 321 for guiding the filtered air to the ventilation pipe 1. A pipe port connection mechanism 31 is installed on both the air inlet guide rail 321 and the air outlet guide rail 323, and the pipe port connection mechanism 31 can be connected to the interfaces of the ventilation pipes 1 or fresh air blower 2 of different sizes to ensure the convenience of connection.

[0046] The assembly installation shell 33 and the fixed installation shell 32 can be separated from each other, and the limiting guide column 34 ensures that the assembly installation shell 33 and the fixed installation shell 32 can be separated stably. The side of the assembly installation shell 33 is provided with a clamping groove 331, which cooperates with the clamping mechanism on the fixed installation shell 32 to achieve the fixation of the assembly installation shell 33. In addition, the bottom of the assembly installation shell 33 is provided with a discharge port 332 and a collection box 35, which are used to discharge and collect dust cleaned by the positioning cleaning member 6. The assembly installation shell 33 can be easily separated from the fixed installation shell 32, so as to facilitate the replacement and maintenance of the annular filter layer 5.

[0047] See also Figures 5 to 7 As shown, the pipe mouth connection mechanism 31 includes a conical joint 311 installed on the assembled guide shell 3, and the outer wall of the conical joint 311 is distributed with multiple adaptive step surfaces 312. The pipe mouth connection mechanism 31 also includes a binding tie 313 for fixing the ventilation pipe 1.

[0048] The pipe orifice connection mechanism 31 is installed on both the air inlet guide rail 321 and the air outlet guide rail 323. The pipe orifice connection mechanism 31 includes a conical joint 311, and the outer wall of the conical joint 311 is distributed with a plurality of adaptive step surfaces 312, and an anti-slip layer is provided on the adaptive step surfaces 312 to enhance the stability of the connection. When it is necessary to connect the ventilation pipe 1 with the conical joint 311, the staff can insert the pipe orifice of the ventilation pipe 1 into the conical joint 311. Due to the design of the adaptive step surface 312 on the conical joint 311, it can adapt to and dock with the pipe orifices of ventilation pipes 1 of different diameters, thereby ensuring the wide adaptability of the connection.

[0049] Once the pipe opening of the ventilation pipe 1 is butted against the conical joint 311, the staff can use the binding tie 313 to bundle the butted ventilation pipe 1, so that the ventilation pipe 1 and the conical joint 311 are stably fitted to avoid looseness or leakage when air flows through, further ensuring the stability and reliability of the connection.

[0050] See also Figures 2 to 3 As shown, the clamping mechanism includes a movable hook 36 slidably installed inside the mounting slot 322 , a first return spring 37 is installed between the movable hook 36 and the mounting slot 322 , and a movable paddle 38 is provided on the side of the movable hook 36 .

[0051] When the connection structure between the ventilation pipe 1 and the fan is in normal working state, the elastic force of the first return spring 37 causes the movable hook 36 to be tightly engaged in the engaging groove 331 of the assembly installation shell 33, thereby realizing a stable connection between the fixed installation shell 32 and the assembly installation shell 33. This connection method not only ensures the overall stability of the structure, but also effectively prevents loosening caused by airflow impact or vibration.

[0052] However, when the annular filter layer 5 needs to be replaced or maintained, the fixed installation shell 32 and the assembled installation shell 33 need to be separated. At this time, the staff can press the movable paddle 38. The movable paddle 38 is located on the side of the movable hook 36. When pressed, it pushes the movable hook 36 to slide along the inside of the installation slot 322. As the movable hook 36 moves, it gradually disengages from the engaging slot 331 of the assembled installation shell 33, thereby releasing the fixed connection between the fixed installation shell 32 and the assembled installation shell 33.

[0053] Once the movable hook 36 is completely separated from the clamping groove 331, the fixed installation shell 32 and the assembled installation shell 33 can be easily separated. The operation process of replacing or maintaining the annular filter layer 5 is simplified, and the work efficiency is improved. At the same time, due to the existence of the clamping mechanism, the stability and reliability of the fixed installation shell 32 and the assembled installation shell 33 when connected are ensured.

[0054] See also Figures 4 to 10As shown, the airflow transmission seat 4 is rotatably mounted on the assembled mounting shell 33 , a plurality of mounting guide posts 42 are provided on the airflow transmission seat 4 , and a plurality of airflow blades 43 are provided on the airflow transmission seat 4 .

[0055] When the fresh air blower 2 is started and generates airflow, the airflow first enters the interior of the assembled flow guide housing 3 through the air inlet guide rail 321 on the top of the fixed mounting shell 32. At this time, the airflow encounters the airflow transmission seat 4 installed on the assembled mounting shell 33. The airflow transmission seat 4 is fixed with an annular filter layer 5 through a plurality of mounting guide posts 42, and the annular filter layer 5 is used to filter dust and particles in the airflow. Under normal working conditions, the airflow enters the interior of the assembled flow guide housing 3 through the annular filter layer 5, and after further processing, it flows out from the air outlet guide rail 323 and finally enters the ventilation pipe 1. However, when dust accumulates on the surface of the annular filter layer 5 and causes blockage, the airflow will be hindered and diffuse along the surface of the annular filter layer 5. The diffused airflow will increase the contact area with the airflow blades 43 on the airflow transmission seat 4, thereby generating a greater driving force.

[0056] When the driving force exceeds the set resistance of the rotation resistance member 41, the airflow transmission seat 4 starts to rotate, driving the synchronous rotation of the annular filter layer 5. Through the rotation of the annular filter layer 5, the originally blocked filter surface is gradually moved to a non-circulation position, while the unblocked filter surface moves to a suitable position to continue filtering the airflow.

[0057] In addition, as the annular filter layer 5 rotates, its outer wall rubs against the cleaning surface of the positioning cleaning member 6, thereby effectively cleaning the dust on the surface of the annular filter layer 5. The cleaned dust is discharged through the discharge port 332 at the bottom of the assembly installation shell 33 and collected in the collection box 35.

[0058] See also Figures 4 to 6 As shown, the rotation resistance member 41 includes an adjustment mounting seat 411 fixedly mounted on the assembly mounting shell 33 , and a rotation connection block 412 is rotatably mounted inside the adjustment mounting seat 411 , and one end of the rotation connection block 412 is connected to the airflow transmission seat 4 .

[0059] The rotation resistance member 41 is composed of an adjustment mounting seat 411 fixedly mounted on the assembly mounting shell 33. A rotation mounting mechanism is provided inside the adjustment mounting seat 411 to accommodate and support the rotation of the rotation connection block 412. One end of the rotation connection block 412 is connected to the air flow transmission seat 4, thereby forming a force transmission path.

[0060] The outer surface of the rotating connection block 412 is designed with an anti-slip surface to increase the friction with the internal contact surface of the adjustment mounting seat 411 to adjust the rotation resistance. The adjustment mounting seat 411 itself has an adjustment function, which allows the staff to adjust the relative position or tightness of the rotating connection block 412 therein according to the actual wind conditions of the fresh air fan 2, thereby achieving precise control of the friction force on the rotating connection block 412.

[0061] In specific operation, the staff makes necessary adjustments to the adjustment mounting seat 411 by observing the operating conditions of the fresh air fan 2 and the rotation of the air flow transmission seat 4. Through adjustment, the resistance that the rotating connection block 412 needs to overcome during the rotation process can be changed. When the resistance of the rotating connection block 412 is adjusted to a suitable level, the precise control of the rotation resistance of the air flow transmission seat 4 can be achieved. It ensures that under different wind conditions, the air flow transmission seat 4 can be rotated in time according to the preset resistance threshold, thereby maintaining the stable operation of the ventilation system and effectively extending the service life of the annular filter layer 5.

[0062] See also Figure 5 and Figure 6 As shown, a limit mounting rail 4111 is provided on the adjustment mounting seat 411, an adjustment slider 4112 is installed inside the limit mounting rail 4111, a threaded adjustment rod 4113 is also installed on the limit mounting rail 4111, the threaded adjustment rod 4113 is threadedly connected with the adjustment slider 4112, and a friction resistance block 4114 is also slidably installed on the limit mounting rail 4111, and the friction resistance block 4114 is provided with friction teeth, and a push spring 4115 is installed between the friction resistance block 4114 and the adjustment slider 4112.

[0063] The position-limiting mounting rail 4111 on the adjusting mounting seat 411 provides an accurate moving path for the adjusting slider 4112. The adjusting slider 4112 is driven by the threaded adjusting rod 4113 in the position-limiting mounting rail 4111, and the threaded connection between the threaded adjusting rod 4113 and the adjusting slider 4112 ensures the accuracy and stability of the adjustment. As the threaded adjusting rod 4113 rotates, the adjusting slider 4112 moves along the position-limiting mounting rail 4111 and compresses the push spring 4115.

[0064] The compression of the push spring 4115 causes it to apply greater pressure to the friction block 4114, and the friction teeth provided on the friction block 4114 effectively contact the outer wall of the rotating connection block 412, thereby increasing the resistance that the rotating connection block 412 needs to overcome during the rotation process. By adjusting the threaded adjustment rod 4113, the compression degree of the push spring 4115 can be accurately controlled, thereby achieving the pressure adjustment applied to the friction block 4114.

[0065] By adjusting the resistance of the rotating connection block 412 through the friction resistance block 4114, it is ensured that under different wind conditions, the airflow transmission seat 4 can stably rotate according to the preset resistance threshold, thereby maintaining the stable operation of the ventilation system and extending the service life of the annular filter layer 5.

[0066] See also Figure 2 and Figure 8 As shown, the positioning and cleaning member 6 includes a mounting plate 61 mounted on the fixed mounting shell 32, and a plurality of positioning support plates 62 and a cleaning plate 63 are provided on the mounting plate 61. The positioning support plates 62 and the cleaning plates 63 extend toward the airflow transmission seat 4 through the interlaced mounting grooves, and a plurality of sliding balls 64 are provided on the positioning support plates 62 and the cleaning plates 63, and a plurality of cleaning strips 631 are provided on the cleaning plate 63, and a plurality of blanking holes are also provided on the cleaning plate 63.

[0067] The mounting plate 61 is firmly mounted on the fixed mounting shell 32, serving as a supporting base for the positioning support plate 62 and the cleaning plate 63. The positioning support plate 62 and the cleaning plate 63 are fixed by the preset structure on the mounting plate 61, and pass through the interlaced mounting grooves to form effective contact with the airflow transmission seat 4 and the annular filter layer 5.

[0068] A plurality of sliding balls 64 are designed on the positioning support plate 62 and the cleaning plate 63. The sliding balls 64 can not only provide necessary support when the airflow transmission seat 4 rotates, reduce the friction between the airflow transmission seat 4 and the positioning support plate 62 and the cleaning plate 63, but also ensure the stability of the airflow transmission seat 4 during the rotation process.

[0069] The cleaning strips 631 on the cleaning plate 63 are designed to fit tightly against the outer wall of the annular filter layer 5. When the annular filter layer 5 rotates due to dust accumulation, the cleaning strips 631 will rub against it, thereby effectively cleaning the dust on the surface of the annular filter layer 5. This not only ensures the timeliness of cleaning, but also avoids the decrease in filtration efficiency due to dust accumulation.

[0070] In addition, a plurality of drop holes are provided on the cleaning plate 63. The main function of the drop holes is to guide the cleaned dust to fall into the collection box 35 during the cleaning process. This can prevent dust from accumulating inside the connection structure, and can also conveniently uniformly process the dust through the collection box 35. The positioning cleaning member 6 realizes the effective cleaning of the annular filter layer 5 and the collection of dust, thereby ensuring the continuous and efficient operation of the connection structure between the ventilation pipe 1 and the fan.

[0071] See also Figure 2 , Figure 5 and Fig. 9As shown, the wind test piece 7 includes a transparent mounting shell 71 mounted on the air outlet guide rail 323, a movable detection block 72 is slidably mounted inside the transparent mounting shell 71, a wind blocking plate 721 is provided on the movable detection block 72, and a pressure measuring spring 73 is installed between the movable detection block 72 and the transparent mounting shell 71.

[0072] The wind force test piece 7 includes a transparent mounting shell 71 mounted on the air outlet guide rail 323, and the transparent mounting shell 71 is designed to visually observe the movement state of the internal components. An active detection block 72 is slidably mounted inside the transparent mounting shell 71, and a wind blocking plate 721 is provided on the active detection block 72, and the wind blocking plate 721 is directly exposed to the airflow flowing out of the air outlet end of the assembled guide housing 3.

[0073] When the airflow passes through the assembled guide housing 3 and reaches the air outlet guide rail 323, the flowing airflow pushes the wind blocking plate 721, thereby driving the movable detection block 72 to slide inside the transparent mounting shell 71. The moving distance and speed of the movable detection block 72 directly reflect the strength and stability of the airflow. The maintenance personnel can evaluate the circulation effect of the airflow by observing the position of the movable detection block 72 inside the transparent mounting shell 71. If the movable detection block 72 moves to the preset designated position, it indicates that the airflow is in a normal state and the ventilation system performs well.

[0074] In addition, a pressure measuring spring 73 is installed between the movable detection block 72 and the transparent mounting shell 71. The pressure measuring spring 73 maintains a certain preload force under normal conditions, and is used to provide a reset force after the movable detection block 72 is pushed by the airflow. When the airflow pushes the air blocking plate 721 and the movable detection block 72 to move, the pressure measuring spring 73 will be compressed and store elastic potential energy. Once the airflow weakens or stops, the pressure measuring spring 73 will release the stored elastic potential energy and push the movable detection block 72 to reset to the initial position. This facilitates real-time monitoring and evaluation of the airflow status in the ventilation system.

[0075] A method for connecting a ventilation pipe and a fan connecting structure comprises the following steps:

[0076] S1. Fix the assembled air guide housing 3 to the wall 8, connect the air inlet end of the assembled air guide housing 3 to the fresh air fan 2, and connect the air outlet end of the assembled air guide housing 3 to the ventilation pipe 1.

[0077] S2. Install the airflow transmission seat 4 in the housing to ensure its free rotation, install the rotation resistance member 41, and adjust the positioning resistance according to the air volume to optimize the airflow distribution.

[0078] S3, installing the annular filter layer 5 on the airflow transmission seat 4.

[0079] S4, start the fresh air fan 2, and the air passes through the air flow transmission seat 4 and the annular filter layer 5 in sequence, and finally enters the ventilation.

[0080] S5. Use the wind force test piece 7 to monitor the air circulation effect at the air outlet, and evaluate the ventilation performance of the annular filter layer 5 based on the readings.

[0081] S6. After the annular filter layer 5 is dusty, the airflow drives the rotating seat to rotate, so that the annular filter layer 5 and the positioning cleaning member 6 rub against each other to clean the dust.

[0082] S7. Regularly check the wind force test piece 7, the annular filter layer 5 and the positioning cleaning piece 6, and perform necessary maintenance and replacement.

[0083] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A ventilation duct and fan connection structure, comprising a self-cleaning connection mechanism installed between the ventilation duct (1) and the fresh air fan (2), characterized in that: The self-cleaning connection mechanism comprises an assembled flow guide housing (3), an air flow transmission seat (4), an annular filter layer (5), a positioning cleaning piece (6) and a wind force testing piece (7); The assembled flow guide housing (3) is installed on the wall (8), the air inlet end of the assembled flow guide housing (3) is connected to the fresh air fan (2), and the air outlet end of the assembled flow guide housing (3) is connected to the ventilation pipe (1); The airflow transmission seat (4) is installed inside the assembled flow guide housing (3), and the airflow transmission seat (4) also includes a rotation resistance member (41) installed on the assembled flow guide housing (3), and the rotation resistance member (41) is used to increase the rotation resistance of the airflow transmission seat (4); The annular filter layer (5) is mounted on the airflow transmission seat (4); The positioning cleaning member (6) is installed between the airflow transmission seat (4) and the annular filter layer (5), and the cleaning surface of the positioning cleaning member (6) is in contact with the outer wall of the annular filter layer (5); A wind force test piece (7) is installed on the air outlet end of the assembled guide shell.

2. A ventilation pipe and fan connection structure according to claim 1, characterized in that: The assembled flow guide housing (3) is composed of a fixed installation housing (32) and an assembled installation housing (33). An air inlet guide rail (321) is installed on the top of the fixed installation housing (32). An air outlet guide rail (323) is installed on the side of the fixed installation housing (32) away from the air inlet guide rail (321). A pipe port connecting mechanism (31) is installed on both the air outlet guide rail (323) and the air inlet guide rail (321). A mounting slot (322) is provided on the side of the fixed installation housing (32). A through-mounting groove is provided on one side of the mounting shell (32) away from the mounting slot (322); a limit guide column (34) is slidably installed between the assembled mounting shell (33) and the fixed mounting shell (32); a clamping groove (331) is also provided on the side of the assembled mounting shell (33); a discharge port (332) is installed at the bottom of the assembled mounting shell (33); a collection box (35) is also installed at the bottom of the assembled mounting shell (33); and a clamping mechanism is installed on the mounting slot (322).

3. A ventilation pipe and fan connection structure according to claim 2, characterized in that: The pipe mouth connection mechanism (31) comprises a conical butt joint (311) mounted on the assembled flow guide housing (3), the outer wall of the conical butt joint (311) is distributed with a plurality of adaptive step surfaces (312), and the pipe mouth connection mechanism (31) further comprises a binding tie (313) for fixing the ventilation pipe (1).

4. A ventilation pipe and fan connection structure according to claim 2, characterized in that: The clamping mechanism comprises a movable clamping hook (36) slidably mounted inside the mounting clamping slot (322), a first return spring (37) is mounted between the movable clamping hook (36) and the mounting clamping slot (322), and a movable paddle (38) is provided on the side of the movable clamping hook (36).

5. A ventilation pipe and fan connection structure according to claim 2, characterized in that: The airflow transmission seat (4) is rotatably mounted on the assembly mounting shell (33), a plurality of mounting guide posts (42) are arranged on the airflow transmission seat (4), and a plurality of airflow blades (43) are arranged on the airflow transmission seat (4).

6. A ventilation pipe and fan connection structure according to claim 1, characterized in that: The rotation resistance member (41) comprises an adjustment mounting seat (411) fixedly mounted on the assembly mounting shell (33), a rotation connection block (412) is rotatably mounted inside the adjustment mounting seat (411), and one end of the rotation connection block (412) is connected to the airflow transmission seat (4).

7. A ventilation pipe and fan connection structure according to claim 6, characterized in that: The adjusting mounting seat (411) is provided with a limit mounting rail (4111), an adjusting slider (4112) is installed inside the limit mounting rail (4111), a threaded adjusting rod (4113) is also installed on the limit mounting rail (4111), the threaded adjusting rod (4113) is threadedly connected to the adjusting slider (4112), and a friction block (4114) is also slidably installed on the limit mounting rail (4111), the friction block (4114) is provided with friction teeth, and a push spring (4115) is installed between the friction block (4114) and the adjusting slider (4112).

8. A ventilation pipe and fan connection structure according to claim 2, characterized in that: The positioning cleaning member (6) comprises a mounting plate (61) mounted on the fixed mounting shell (32), a plurality of positioning support plates (62) and cleaning plates (63) being arranged on the mounting plate (61), the positioning support plates (62) and cleaning plates (63) extending toward the airflow transmission seat (4) through the interlaced mounting grooves, a plurality of sliding balls (64) being arranged on the positioning support plates (62) and the cleaning plates (63), a plurality of cleaning strips (631) being arranged on the cleaning plates (63), and a plurality of blanking holes being arranged on the cleaning plates (63).

9. A ventilation pipe and fan connection structure according to claim 2, characterized in that: The wind force test piece (7) comprises a transparent mounting shell (71) mounted on an air outlet guide rail (323), a movable detection block (72) being slidably mounted inside the transparent mounting shell (71), a wind blocking plate (721) being provided on the movable detection block (72), and a pressure measuring spring (73) being mounted between the movable detection block (72) and the transparent mounting shell (71).

10. A method for connecting a ventilation duct and a fan connecting structure, using a ventilation duct and a fan connecting structure according to any one of claims 1 to 9, characterized in that: The steps include: S1, fixing the assembled flow guide housing (3) to the wall (8), connecting the air inlet end of the assembled flow guide housing (3) to the fresh air fan (2), and connecting the air outlet end of the assembled flow guide housing (3) to the ventilation pipe (1); S2. Install the airflow transmission seat (4) in the housing to ensure its free rotation, install the rotation resistance member (41), and adjust the positioning resistance according to the air volume to optimize the airflow distribution; S3, installing the annular filter layer (5) on the airflow transmission seat (4); S4, start the fresh air blower (2), and the air passes through the air flow transmission seat (4), the annular filter layer (5) in sequence, and finally enters the ventilation; S5. Use a wind force test piece (7) to monitor the air circulation effect at the air outlet, and evaluate the ventilation performance of the annular filter layer (5) based on the readings; S6, after the annular filter layer (5) is dusty, the airflow drives the rotating seat to rotate, so that the annular filter layer (5) and the positioning cleaning member (6) rub against each other to clean the dust; S7. Regularly check the wind force test piece (7), the annular filter layer (5) and the positioning cleaning piece (6), and perform necessary maintenance and replacement.

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