Ventilation pipe and fan connection structure and connection method thereof

Abstract

The present application relates to the technical field of ventilation equipment, in particular to a ventilation pipe and fan connecting structure and a connecting method thereof, which comprises a self-cleaning connecting mechanism installed between the ventilation pipe and a fresh air fan, the self-cleaning connecting mechanism comprises an assembled flow guide shell, an airflow transmission seat, an annular filter layer, a positioning and cleaning piece and a wind power testing piece; the air inlet end of the assembled flow guide shell is connected with the fresh air fan, and the air outlet end of the assembled flow guide shell is connected with the ventilation pipe; the airflow transmission seat is installed in the interior of the assembled flow guide shell, and the airflow transmission seat further comprises a rotating resistance piece installed on the assembled flow guide shell; the annular filter layer is installed on the airflow transmission seat; the positioning and cleaning piece is installed between the airflow transmission seat and the annular filter layer, the cleaning surface of the positioning and cleaning piece is attached to the outer wall of the annular filter layer; and the wind power testing piece is installed at the air outlet end of the assembled flow guide shell, so that the present application can effectively improve the convenience of maintenance and the service life of the mechanism.

Description

TECHNICAL FIELD

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

[0002] At present, for the indoor environment with strong sealing, the new air volume is insufficient, and the indoor oxygen concentration is low, therefore, the new fan for ventilation is more and more popular.

[0003] Chinese patent No. CN109323356B discloses a ventilation pipe assembly and a new fan with the same, the ventilation pipe assembly is used for penetrating in the wall and connecting with the new fan body, the ventilation pipe assembly comprises: a pipe body, the pipe body is used for penetrating in the wall and communicating with the new fan body located outdoors or being pulled out from the wall; a filtering device, used for filtering the new air in the shell of the new fan body, the filtering device is a tubular structure, the filtering device is arranged on the pipe body, so that the filtering device is penetrated in the wall or pulled out from the wall with the pipe body; a connecting piece, the connecting piece is arranged at the end of the pipe body, and the filtering device is connected with the connecting piece, so that the filtering device is detachably arranged on the pipe body through the connecting piece. Through the technical scheme provided by the device, the technical problem that the filtering device of the new fan is not convenient to disassemble and wash in the prior art can be solved.

[0004] Although the above technical scheme can disassemble the filtering device, during the replacement process, whenever the filtering 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 with the new fan body from the wall installation position and separate it from the new fan body, so as to access and replace the internal filtering device. This series of steps not only consumes time and effort, increases maintenance cost, but also may cause the sealing performance of the pipe body to decrease due to frequent disassembly and assembly, affecting the overall performance of the system, in addition, the core filtering element of the existing filtering device is mostly an air filter layer, although it can effectively block dust, particles and other pollutants in the air to a certain extent, but the filtering surface is easy to accumulate dust during use, which gradually reduces the filtering efficiency, and even causes blockage. This blockage not only limits the air flow, seriously affects the ventilation effect, but also may breed bacteria and mold due to poor air flow, thereby causing secondary pollution to the indoor air quality. SUMMARY

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

[0006] In order to solve the prior art problems, the present application provides a ventilation pipe and fan connecting structure, which comprises a self-cleaning connecting mechanism installed between the ventilation pipe and the fresh air fan, the self-cleaning connecting mechanism comprising an assembled flow guide shell, an airflow transmission seat, an annular filter layer, a positioning and cleaning piece and a wind power testing piece; the assembled flow guide shell is installed on the wall, the air inlet end of the assembled flow guide shell is connected with the fresh air fan, and the air outlet end of the assembled flow guide shell is connected with the ventilation pipe; the airflow transmission seat is installed in the interior of the assembled flow guide shell, the airflow transmission seat further comprises a rotating resistance piece installed on the assembled flow guide shell, and the rotating resistance piece is used to increase the rotating resistance of the airflow transmission seat; the annular filter layer is installed on the airflow transmission seat; the positioning and cleaning piece is installed between the airflow transmission seat and the annular filter layer, and the cleaning surface of the positioning and cleaning piece is attached to the outer wall of the annular filter layer; and the wind power testing piece is installed at the air outlet end of the assembled flow guide shell.

[0007] Preferably, the assembled flow guide shell is composed of a fixed installation shell and an assembled installation shell, the top of the fixed installation shell is provided with an air inlet guide rail, the side of the fixed installation shell away from the air inlet guide rail is provided with an air outlet guide rail, the air outlet guide rail and the air inlet guide rail are both provided with a pipe opening connecting mechanism, the side of the fixed installation shell is provided with an installation clamping groove, the side of the fixed installation shell away from the installation clamping groove is provided with a penetrating installation slot, a limiting guide column is slidingly installed between the assembled installation shell and the fixed installation shell, the side of the assembled installation shell is further provided with a clamping groove, the bottom of the assembled installation shell is provided with a discharge port, the bottom of the assembled installation shell is further provided with a collection box, and the clamping groove is provided with a clamping mechanism.

[0008] Preferably, the pipe opening connecting mechanism comprises a conical butt joint installed on the assembled flow guide shell, the outer wall of the conical butt joint is provided with a plurality of adaptive stepped surfaces, and the pipe opening connecting mechanism further comprises a binding strap for fixing the ventilation pipe.

[0009] Preferably, the clamping mechanism comprises a movable clamping hook slidingly installed in the interior of the installation clamping groove, a first reset spring is installed between the movable clamping hook and the installation clamping groove, and the side of the movable clamping hook is provided with a movable tab.

[0010] Preferably, the airflow transmission seat is rotatably installed on the assembled installation shell, a plurality of installation guide columns are arranged on the airflow transmission seat, and a plurality of airflow blades are arranged on the airflow transmission seat.

[0011] Preferably, the rotating resistance piece comprises an adjusting installation seat fixedly installed on the assembled installation shell, a rotating connecting block is rotatably installed in the interior of the adjusting installation seat, and one end of the rotating connecting block is connected with the airflow transmission seat.

[0012] Preferably, the adjusting installation seat is provided with a limiting installation rail, an adjusting sliding block is installed in the interior of the limiting installation rail, a threaded adjusting rod is further installed on the limiting installation rail, the threaded adjusting rod is threadedly connected with the adjusting sliding block, a friction abutting block is further slidingly installed on the limiting installation rail, the friction abutting block is provided with friction teeth, and a pushing spring is installed between the friction abutting block and the adjusting sliding block.

[0013] Preferably, the positioning and cleaning member comprises a mounting plate mounted on the fixed mounting shell, a plurality of positioning support plates and cleaning plates are arranged on the mounting plate, the positioning support plates and the cleaning plates extend to the airflow transmission seat through the penetrating installation slot, a plurality of sliding balls are arranged on the positioning support plates and the cleaning plates, a plurality of cleaning strips are arranged on the cleaning plates, and a plurality of material falling holes are further arranged on the cleaning plates.

[0014] Preferably, the wind force testing member comprises a transparent mounting shell mounted on the air outlet guide rail, a movable detection block is slidably mounted in the transparent mounting shell, a wind blocking plate is arranged on the movable detection block, and a pressure measuring spring is arranged between the movable detection block and the transparent mounting shell.

[0015] A connecting method of a ventilation pipe and a fan connection structure, comprising the following steps:

[0016] S1, the assembled flow guide shell is fixed to the wall body, the air inlet end of the assembled flow guide shell is connected with the fresh air fan, and the air outlet end of the assembled flow guide shell is connected with the ventilation pipe.

[0017] S2, the airflow transmission seat is installed in the shell body to ensure its free rotation, and the rotating resistance member is installed to adjust the positioning resistance according to the air volume, so as to optimize the airflow distribution.

[0018] S3, the annular filter layer is installed on the airflow transmission seat.

[0019] S4, the fresh air fan is started, and air passes through the airflow transmission seat and the annular filter layer in sequence and finally enters the ventilation.

[0020] S5, the wind force testing member is used to monitor the air flow effect of the air outlet end, and the ventilation performance of the annular filter layer is evaluated according to the reading.

[0021] S6, after the annular filter layer is accumulated with dust, the airflow drives the airflow transmission seat to rotate, so that the annular filter layer is rubbed and cleaned by the positioning and cleaning member.

[0022] S7, the wind force testing member, the annular filter layer and the positioning and cleaning member are regularly checked, and necessary maintenance and replacement are performed.

[0023] The beneficial effects of the present application compared with the prior art are:

[0024] 1、The present application realizes the optimal control of air distribution by introducing the combination design of airflow transmission seat and rotating resistance part. By adjusting the rotating resistance part, the rotating degree of the airflow transmission seat can be accurately controlled. When the surface of the annular filter layer accumulates dust, causing air flow obstruction, the airflow transmission seat can automatically rotate, driving the annular filter layer to rotate, so that the unblocked filter surface moves to the flow-through position, thereby ensuring the air flow. The friction between the positioning and cleaning part and the annular filter layer effectively removes the dust on the surface of the annular filter layer, improving the filtering efficiency and prolonging the service life of the annular filter layer. At the same time, by reasonably adjusting the rotating degree of the airflow transmission seat, excessive friction and wear between the annular filter layer and the positioning and cleaning part can be effectively avoided.

[0025] 2、The present application can monitor and evaluate the air flow effect in real time through the wind power test part. By observing the readings of the wind power test part, maintenance personnel can intuitively understand the working state of the annular filter layer and the overall performance of the ventilation system. Not only can it help to find and solve problems in time, but also can guide maintenance personnel to carry out targeted maintenance and adjustment, so as to ensure the continuous and efficient operation of the ventilation system.

[0026] 3、The present application adopts the design of assembling the flow guide shell, so that the installation and disassembly process is more simple and convenient. At the same time, since the airflow transmission seat, the annular filter layer, the positioning and cleaning part and the wind power test part are 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 operation space, but also avoids the problem of reduced pipe body sealing caused by frequent disassembly and assembly, thereby reducing maintenance cost and improving the overall performance and reliability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic diagram of the installation of a ventilation pipe and fan connection structure of the present application.

[0028] Figure 2 is a schematic diagram of the installation of a ventilation pipe and fan connection structure of the present application. Figure 1 .

[0029] Figure 3 is Figure 2 a local enlarged view of A in

[0030] Figure 4 is a schematic diagram of the installation of a ventilation pipe and fan connection structure of the present application. Figure 2 .

[0031] Figure 5 is a plane cross-sectional perspective view of a ventilation pipe and fan connection structure of the present application.

[0032] Figure 6 is Figure 5An enlarged view of the middle B.

[0033] Figure 7 is Figure 5 An enlarged view of the middle C.

[0034] Figure 8 is a perspective view of a positioning and cleaning member in a ventilation pipe and fan connecting structure of the present application.

[0035] Figure 9 is a perspective view of a wind force testing member in a ventilation pipe and fan connecting structure of the present application.

[0036] Figure 10 is a planar sectional view of a ventilation pipe and fan connecting structure of the present application.

[0037] Reference numerals in the drawings are:

[0038] 1, ventilation pipe; 2, new fan; 3, assembled flow guide shell; 31, pipe opening connecting mechanism; 311, conical butt joint; 312, stepped surface adapting part; 313, binding strap; 32, fixed installation shell; 321, air inlet guide rail; 322, installation clamping groove; 323, air outlet guide rail; 33, assembled installation shell; 331, clamping groove; 332, discharge port; 34, limiting guide column; 35, collection box; 36, movable clamping hook; 37, first return spring; 38, movable push piece; 4, air flow transmission seat; 41, rotation resistance member; 411, adjusting installation seat; 4111, limiting installation rail; 4112, adjusting sliding block; 4113, screw adjusting rod; 4114, friction abutting block; 4115, push spring; 412, rotation connecting block; 42, installation guide column; 43, air flow blade; 5, annular filter layer; 6, positioning and cleaning member; 61, installation plate; 62, positioning support plate; 63, cleaning plate; 631, cleaning strip; 64, sliding ball; 7, wind force testing member; 71, transparent installation shell; 72, movable detection block; 721, wind resistance plate; 73, pressure measuring spring; 8, wall. DETAILED DESCRIPTION

[0039] To further understand the features, technical means and achieved specific purposes and functions of the present application, the present application is described in further detail below in combination with the drawings and specific embodiments.

[0040] Reference Figures 1 to 10As shown, a ventilation pipe and fan connection structure, including a self-cleaning connection mechanism installed between the ventilation pipe 1 and the fresh air fan 2, the self-cleaning connection mechanism includes a assembled flow guide shell 3, an airflow transmission seat 4, an annular filter layer 5, a positioning and cleaning part 6 and a wind power testing part 7; the assembled flow guide shell 3 is installed on the wall 8, the air inlet end of the assembled flow guide shell 3 is connected with the fresh air fan 2, and the air outlet end of the assembled flow guide shell 3 is connected with the ventilation pipe 1; the airflow transmission seat 4 is installed inside the assembled flow guide shell 3, the airflow transmission seat 4 further includes a rotating resistance part 41 installed on the assembled flow guide shell 3, the rotating resistance part 41 is used to increase the rotating resistance of the airflow transmission seat 4; the annular filter layer 5 is installed on the airflow transmission seat 4; the positioning and cleaning part 6 is installed between the airflow transmission seat 4 and the annular filter layer 5, the cleaning surface of the positioning and cleaning part 6 is attached to the outer wall of the annular filter layer 5; the wind power testing part 7 is installed at the air outlet end of the assembled flow guide shell 3.

[0041] The assembled flow guide shell 3 is first firmly installed on the wall 8 as an intermediate structure between the fresh air system and the ventilation pipe 1. The air inlet end of the assembled flow guide shell 3 is directly connected with the fresh air fan 2, while the air outlet end is connected with the ventilation pipe 1, ensuring that 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 rotating resistance part 41 is used to adjust and increase the rotating resistance of the airflow transmission seat 4. The rotating resistance part 41 allows workers to control the rotating force of the airflow transmission seat 4 by adjusting the rotating resistance part 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, effectively blocking dust, particles and other pollutants in the air.

[0042] When the air passes through the assembled flow guide shell 3, it first passes through the airflow transmission seat 4, then filters through the annular filter layer 5, and finally flows out from the air outlet end of the assembled flow guide shell 3 into the ventilation pipe 1. Over time, dust accumulates on the surface of the annular filter layer 5, affecting the filtering efficiency. At this time, due to the obstruction of the flowing air, the airflow will spread 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 rotating resistance part 41, causing the airflow transmission seat 4 to start rotating. The rotation of the airflow transmission seat 4 will drive the annular filter layer 5 to rotate, thereby moving the unblocked filter surface to the appropriate flow position, ensuring that the air can continue to flow. At the same time, the annular filter layer 5 will rub against the positioning and cleaning part 6 during rotation, and the cleaning surface of the positioning and cleaning part 6 is attached to the outer wall of the annular filter layer 5, thereby effectively cleaning the dust on the surface of the annular filter layer 5 and ensuring the filtering effect.

[0043] The wind force test piece 7 is installed at the air outlet end of the assembled flow guide shell 3, which is used to monitor and evaluate the air circulation effect in real time. Maintenance personnel can understand the working state 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 timely maintain and adjust. 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] Referring to Figures 1 to 10 As shown, the assembled flow guide shell 3 is composed of a fixed installation shell 32 and an assembled installation shell 33. The top of the fixed installation shell 32 is provided with an air inlet guide rail 321. The side of the fixed installation shell 32 away from the air inlet guide rail 321 is provided with an air outlet guide rail 323. The air outlet guide rail 323 and the air inlet guide rail 321 are both provided with a pipe connection mechanism 31. The side of the fixed installation shell 32 is provided with a mounting clamping groove 322. The side of the fixed installation shell 32 away from the mounting clamping groove 322 is provided with a penetrating installation slot. The assembled installation shell 33 is slidingly installed with a limiting guide column 34 between the fixed installation shell 32. The side of the assembled installation shell 33 is also provided with a clamping groove 331. The bottom of the assembled installation shell 33 is provided with a discharge port 332. The bottom of the assembled installation shell 33 is also provided with a collection box 35. The mounting clamping groove 322 is provided with a clamping mechanism.

[0045] The top of the fixed installation shell 32 is provided with an air inlet guide rail 321 for guiding the airflow of the fresh air machine 2 to enter. The side of the fixed installation shell 32 away from the air inlet guide rail 321 is provided with an air outlet guide rail 323 for guiding the filtered air to the ventilation pipe 1. The air inlet guide rail 321 and the air outlet guide rail 323 are both provided with a pipe connection mechanism 31. The pipe connection mechanism 31 can connect the interfaces of ventilation pipes 1 or fresh air machines 2 of different sizes to ensure the convenience of connection.

[0046] The assembled installation shell 33 and the fixed installation shell 32 can be separated from each other. The limiting guide column 34 ensures the stable separation movement of the assembled installation shell 33 and the fixed installation shell 32. The side of the assembled installation shell 33 is provided with a clamping groove 331, which cooperates with the clamping mechanism on the fixed installation shell 32 to fix the assembled installation shell 33. In addition, the bottom of the assembled installation shell 33 is provided with a discharge port 332 and a collection box 35 for discharging and collecting dust cleaned by the positioning and cleaning piece 6. The assembled installation shell 33 can be easily separated from the fixed installation shell 32, thereby facilitating the replacement and maintenance of the annular filter layer 5.

[0047] Referring to Figures 5 to 7 As shown, the pipe connection mechanism 31 includes a tapered butt joint 311 installed on the assembled flow guide shell 3. The outer wall of the tapered butt joint 311 is provided with a plurality of adaptive stepped surfaces 312. The pipe connection mechanism 31 also includes a binding strap 313 for fixing the ventilation pipe 1.

[0048] On the air inlet guide rail 321 and the air outlet guide rail 323, a pipe joint mechanism 31 is mounted. The pipe joint mechanism 31 comprises a tapered butt joint 311, and the outer wall of the tapered butt joint 311 is provided with a plurality of adaptive stepped surfaces 312. The adaptive stepped surfaces 312 are provided with an anti-skid layer to enhance the stability of the connection. When it is necessary to connect the ventilation pipe 1 with the tapered butt joint 311, the staff can insert the pipe joint of the ventilation pipe 1 into the tapered butt joint 311. Due to the design of the adaptive stepped surfaces 312 on the tapered butt joint 311, it can adapt to and butt joint the pipe joints of ventilation pipes 1 of different diameters, thereby ensuring the wide adaptability of the connection.

[0049] Once the pipe joint of the ventilation pipe 1 is butt jointed with the tapered butt joint 311, the staff can use the binding strap 313 to bind the butt jointed ventilation pipe 1. The stable butt joint between the ventilation pipe 1 and the tapered butt joint 311 can avoid loosening or leakage when the airflow passes through, and further ensure the stability and reliability of the connection.

[0050] Referring to Figures 2 to 3 As shown, the clamping mechanism comprises a movable clamping hook 36 slidingly installed in the installation clamping groove 322, and a first reset spring 37 is installed between the movable clamping hook 36 and the installation clamping groove 322. The side of the movable clamping hook 36 is provided with a movable push piece 38.

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

[0052] However, when it is necessary to replace or maintain the annular filter layer 5, it is necessary to separate the fixed installation shell 32 and the assembled installation shell 33. At this time, the staff can press the movable push piece 38. The movable push piece 38 is located on the side of the movable clamping hook 36, and when it is pressed, it will push the movable clamping hook 36 to slide along the inside of the installation clamping groove 322. With the movement of the movable clamping hook 36, it will gradually be separated from the clamping groove 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 clamping 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. This simplifies the operation process of replacing or maintaining the annular filter layer 5, and also improves the work efficiency. 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 in connection are ensured.

[0054] Referring to Figures 4 to 10As shown, the airflow transmission seat 4 is rotatably installed on the assembled installation shell 33, and a plurality of installation guide columns 42 are arranged on the airflow transmission seat 4, and a plurality of airflow blades 43 are arranged on the airflow transmission seat 4.

[0055] When the new fan 2 is started and airflow is generated, the airflow first enters the inside of the assembled flow guide shell 3 through the air inlet guide rail 321 at the top of the fixed installation shell 32. At this time, the airflow encounters the airflow transmission seat 4 installed on the assembled installation shell 33. The airflow transmission seat 4 is fixed with an annular filter layer 5 through a plurality of installation guide columns 42, and the annular filter layer 5 is used to filter dust and particles in the airflow. In the normal working state, the airflow enters the inside of the assembled flow guide shell 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 the surface of the annular filter layer 5 accumulates dust and causes blockage, the airflow will be hindered and spread along the surface of the annular filter layer 5. The spread airflow will increase the contact area with the airflow blades 43 on the airflow transmission seat 4, thereby generating a greater pushing force.

[0056] When this pushing force exceeds the set resistance of the rotation resistance piece 41, the airflow transmission seat 4 begins 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 the non-flowing position, and the unblocked filter surface is moved to the appropriate 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 and cleaning piece 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 assembled installation shell 33 and collected in the collection box 35.

[0058] Referring to Figures 4 to 6 As shown, the rotation resistance piece 41 includes an adjustment installation seat 411 fixedly installed on the assembled installation shell 33, and a rotation connection block 412 is rotatably installed in the inside of the adjustment installation seat 411, and one end of the rotation connection block 412 is connected with the airflow transmission seat 4.

[0059] The rotation resistance piece 41 is composed of the adjustment installation seat 411 fixedly installed on the assembled installation shell 33. The inside of the adjustment installation seat 411 is provided with a rotation installation mechanism for accommodating and supporting the rotation of the rotation connection block 412. One end of the rotation connection block 412 is connected with the airflow transmission seat 4, thereby forming a force transmission path.

[0060] The outer surface of the rotating connecting block 412 is designed with an anti-slip surface to increase the friction with the inner contact surface of the adjusting mounting base 411, thereby adjusting the rotational resistance. The adjusting mounting base 411 itself has an adjustment function, allowing operators to adjust the relative position or tightness of the rotating connecting block 412 according to the actual airflow of the fresh air unit 2, thereby achieving precise control of the friction force on the rotating connecting block 412.

[0061] In practice, staff observe the operation of the fresh air unit 2 and the rotation of the airflow transmission seat 4, and make necessary adjustments to the adjusting mounting base 411. These adjustments change the resistance that the rotating connecting block 412 needs to overcome during rotation. When the resistance of the rotating connecting block 412 is adjusted to a suitable level, precise control of the rotational resistance of the airflow transmission seat 4 can be achieved. This ensures that the airflow transmission seat 4 can rotate in a timely manner according to the preset resistance threshold under different wind conditions, thereby maintaining the stable operation of the ventilation system and effectively extending the service life of the annular filter layer 5.

[0062] See Figure 5 and Figure 6 As shown, the adjusting mounting base 411 is provided with a limiting mounting rail 4111, and an adjusting slider 4112 is installed inside the limiting mounting rail 4111. A threaded adjusting rod 4113 is also installed on the limiting mounting rail 4111. The threaded adjusting rod 4113 is threadedly connected to the adjusting slider 4112. A friction abutment block 4114 is also slidably installed on the limiting mounting rail 4111. The friction abutment block 4114 is provided with friction teeth. A push spring 4115 is installed between the friction abutment block 4114 and the adjusting slider 4112.

[0063] The limiting mounting rail 4111 on the adjusting mounting base 411 provides a precise movement path for the adjusting slider 4112. The adjusting slider 4112 is driven within the limiting mounting rail 4111 by a threaded adjusting rod 4113. 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 limiting mounting rail 4111, compressing the push spring 4115.

[0064] The compression of the push spring 4115 causes it to apply greater pressure to the friction contact block 4114, while the friction teeth on the friction contact block 4114 effectively abut against the outer wall of the rotating connecting block 412, thereby increasing the resistance that the rotating connecting block 412 needs to overcome during rotation. By adjusting the threaded adjusting rod 4113, the degree of compression of the push spring 4115 can be precisely controlled, thereby adjusting the pressure applied to the friction contact block 4114.

[0065] The resistance adjustment of the rotating connecting block 412 by the frictional resistance block 4114 ensures that the airflow transmission seat 4 can rotate stably according to the preset resistance threshold under different wind conditions, thereby maintaining the stable operation of the ventilation system and prolonging the service life of the annular filter layer 5.

[0066] Referring to Figure 2 and Figure 8 , the positioning and cleaning member 6 includes a mounting plate 61 mounted on the fixed mounting shell 32, a plurality of positioning support plates 62 and cleaning plates 63 are arranged on the mounting plate 61, the positioning support plates 62 and the cleaning plates 63 extend to the airflow transmission seat 4 through the penetrating installation slot, a plurality of sliding balls 64 are arranged on the positioning support plates 62 and the cleaning plates 63, a plurality of cleaning strips 631 are arranged on the cleaning plates 63, and a plurality of material falling holes are further arranged on the cleaning plates 63.

[0067] The mounting plate 61 is stably mounted on the fixed mounting shell 32 as the support basis of the positioning support plates 62 and the cleaning plates 63. The positioning support plates 62 and the cleaning plates 63 are fixed through the preset structure on the mounting plate 61 and form effective contact with the airflow transmission seat 4 and the annular filter layer 5 through the penetrating installation slot.

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

[0069] The cleaning strips 631 on the cleaning plates 63 are designed to closely fit 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, effectively cleaning the dust on the surface of the annular filter layer 5. Not only does it ensure timely cleaning, but it also avoids the decline in filtering efficiency caused by dust accumulation.

[0070] In addition, a plurality of material falling holes are arranged on the cleaning plates 63. The main function of the material falling holes is to guide the cleaned dust to fall into the collection box 35 during the cleaning process. It can avoid dust accumulation in the connecting structure and also facilitate the unified treatment of dust through the collection box 35. The positioning and cleaning member 6 realizes effective cleaning of the annular filter layer 5 and collection of dust, thereby ensuring the continuous and efficient operation of the ventilation pipe 1 and the fan connecting structure.

[0071] Referring to Figure 2 , Figure 5 and Figure 9As shown, the wind force test piece 7 includes a transparent mounting shell 71 mounted on the air outlet guide rail 323, and an activity detection block 72 is slidingly mounted inside the transparent mounting shell 71, and a wind resistance plate 721 is arranged on the activity detection block 72, and a pressure measuring spring 73 is mounted between the activity 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. The activity detection block 72 is slidingly mounted inside the transparent mounting shell 71, and the wind resistance plate 721 is arranged on the activity detection block 72, and the wind resistance plate 721 is directly exposed to the airflow flowing out of the assembled flow guide shell 3 from the air outlet end.

[0073] When the airflow passes through the assembled flow guide shell 3 and reaches the air outlet guide rail 323, the flowing airflow pushes the wind resistance plate 721, which in turn drives the activity detection block 72 to slide inside the transparent mounting shell 71. The movement distance and speed of the activity detection block 72 directly reflect the intensity and stability of the airflow. Maintenance personnel can evaluate the flow effect of the airflow by observing the position of the activity detection block 72 inside the transparent mounting shell 71. If the activity detection block 72 moves to a predetermined designated position, it indicates that the airflow is in a normal state, and the performance of the ventilation system is good.

[0074] In addition, the pressure measuring spring 73 is mounted between the activity detection block 72 and the transparent mounting shell 71, and the pressure measuring spring 73 maintains a certain pre-tightening force in the normal state, and provides a restoring force after the activity detection block 72 is pushed by the airflow. When the airflow pushes the wind resistance plate 721 and the activity detection block 72 to move, the pressure measuring spring 73 is compressed and stores elastic potential energy. Once the airflow weakens or stops, the pressure measuring spring 73 releases the stored elastic potential energy and pushes the activity detection block 72 to reset to the initial position. Real-time monitoring and evaluation of the airflow state in the ventilation system are facilitated.

[0075] A connection method of a ventilation pipe and a fan connection structure, comprising the following steps:

[0076] S1, fixing the assembled flow guide shell 3 to the wall 8, connecting the air inlet end of the assembled flow guide shell 3 to the fresh air fan 2, and connecting the air outlet end of the assembled flow guide shell 3 to the ventilation pipe 1.

[0077] S2, installing the airflow transmission seat 4 in the shell to ensure its free rotation, and installing the rotation resistance piece 41 to 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, starting the fresh air fan 2, and the air passes through the airflow transmission seat 4 and the annular filter layer 5 in sequence, and finally enters the ventilation.

[0080] S5, monitor the air flow effect of the outflow end by using the wind test piece 7, and evaluate the ventilation performance of the annular filter layer 5 according to the reading.

[0081] S6, after the annular filter layer 5 accumulates dust, the airflow drives the airflow transmission seat 4 to rotate, so that the annular filter layer 5 is rubbed and cleaned by the positioning and cleaning piece 6.

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

[0083] The above embodiment only expresses one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A structure for connecting a ventilation duct and a fan, comprising a self-cleaning connecting mechanism installed between a ventilation duct (1) and a fresh air fan (2), characterized in that, The self-cleaning connecting mechanism comprises an assembled flow guide shell (3), an airflow transmission seat (4), an annular filter layer (5), a positioning and cleaning part (6) and a wind force testing part (7); The assembled flow guide shell (3) is installed on a wall body (8), the air inlet end of the assembled flow guide shell (3) is connected with a fresh air machine (2), and the air outlet end of the assembled flow guide shell (3) is connected with a ventilation pipe (1); The airflow transmission seat (4) is installed in the interior of the assembled flow guide shell (3), and the airflow transmission seat (4) further comprises a rotating resistance part (41) installed on the assembled flow guide shell (3), which is used for increasing the rotating resistance of the airflow transmission seat (4); The annular filter layer (5) is installed on the airflow transmission seat (4); The positioning and cleaning part (6) is installed between the airflow transmission seat (4) and the annular filter layer (5), and the cleaning surface of the positioning and cleaning part (6) is attached to the outer wall of the annular filter layer (5); The wind force testing part (7) is installed at the air outlet end of the assembled flow guide shell (3); The rotating resistance part (41) comprises an adjusting mounting seat (411) fixedly installed on the assembled mounting shell (33), a rotating connecting block (412) is rotatably installed in the interior of the adjusting mounting seat (411), and one end of the rotating connecting block (412) is connected with the airflow transmission seat (4); The assembled flow guide shell (3) is composed of a fixed mounting shell (32) and an assembled mounting shell (33), the top of the fixed mounting shell (32) is provided with an air inlet guide rail (321), one side of the fixed mounting shell (32) away from the air inlet guide rail (321) is provided with an air outlet guide rail (323), the air outlet guide rail (323) and the air inlet guide rail (321) are both provided with a pipe mouth connecting mechanism (31), the side of the fixed mounting shell (32) is provided with a mounting clamping groove (322), one side of the fixed mounting shell (32) away from the mounting clamping groove (322) is provided with a penetrating installation slot, the limit guide column (34) is slidingly installed between the assembled mounting shell (33) and the fixed mounting shell (32), the side of the assembled mounting shell (33) is further provided with a clamping groove (331), the bottom of the assembled mounting shell (33) is provided with a discharge port (332), the bottom of the assembled mounting shell (33) is further provided with a collection box (35), and the clamping groove (322) is provided with a clamping mechanism; The wind force testing part (7) comprises a transparent mounting shell (71) installed on the air outlet guide rail (323), an active detection block (72) is slidingly installed in the interior of the transparent mounting shell (71), the active detection block (72) is provided with a wind resistance plate (721), and the measuring pressure spring (73) is installed between the active detection block (72) and the transparent mounting shell (71).

2. The duct and fan connection structure of claim 1, wherein The pipe mouth connecting mechanism (31) comprises a tapered butt joint (311) installed on the assembled flow guide shell (3), a plurality of adaptive stepped surfaces (312) are distributed on the outer wall of the tapered butt joint (311), and the pipe mouth connecting mechanism (31) further comprises a binding tie (313) for fixing the ventilation pipe (1).

3. The duct and fan connection of claim 1, wherein: The clamping mechanism comprises a movable clamping hook (36) slidingly installed inside the mounting clamping groove (322), and a first reset spring (37) is installed between the movable clamping hook (36) and the mounting clamping groove (322), and a movable pressing piece (38) is arranged on the side of the movable clamping hook (36).

4. The duct and fan connection of claim 1, wherein, The airflow transmission seat (4) is rotatably installed on the assembled installation shell (33), a plurality of installation guide columns (42) are arranged on the airflow transmission seat (4), and a plurality of airflow blades (43) are arranged on the airflow transmission seat (4).

5. The duct and fan connection of claim 1, wherein, The adjusting mounting seat (411) is provided with a limiting installation rail (4111), the limiting installation rail (4111) is provided with an adjusting sliding block (4112) installed inside, the limiting installation rail (4111) is further provided with a threaded adjusting rod (4113), the threaded adjusting rod (4113) is in threaded connection with the adjusting sliding block (4112), the limiting installation rail (4111) is further slidingly provided with a frictional abutting block (4114), the frictional abutting block (4114) is provided with frictional teeth, and a pressing spring (4115) is installed between the frictional abutting block (4114) and the adjusting sliding block (4112).

6. The duct and fan connection of claim 1, wherein, The positioning and cleaning piece (6) comprises a mounting plate (61) installed on the fixed installation shell (32), a plurality of positioning support plates (62) and cleaning plates (63) are arranged on the mounting plate (61), the positioning support plates (62) and the cleaning plates (63) extend to the airflow transmission seat (4) through the penetrating installation slot, a plurality of sliding balls (64) are arranged on the positioning support plates (62) and the cleaning plates (63), a plurality of cleaning strips (631) are arranged on the cleaning plates (63), and a plurality of blanking holes are further arranged on the cleaning plates (63).

7. A method of connecting a ventilation duct to a fan using a ventilation duct and fan connection structure according to any one of claims 1 to 6, characterised in that, The method comprises the following steps: S1, fixing the assembled flow guide shell (3) to the wall (8), connecting the air inlet end of the assembled flow guide shell (3) to the fresh air machine (2), and connecting the air outlet end of the assembled flow guide shell (3) to the ventilation pipe (1); S2, installing the airflow transmission seat (4) in the shell body to ensure its free rotation, and installing the rotation resistance piece (41) to 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, starting the fresh air machine (2), and air passes through the airflow transmission seat (4) and the annular filter layer (5) in sequence and finally enters the ventilation; S5, monitoring the air flow effect of the air outlet end by using the wind power test piece (7), and evaluating the ventilation performance of the annular filter layer (5) according to the reading; S6, after the annular filter layer (5) accumulates dust, the airflow drives the airflow transmission seat (4) to rotate, so that the annular filter layer (5) is rubbed and cleaned by the positioning and cleaning piece (6); S7, regularly checking the wind power test piece (7), the annular filter layer (5) and the positioning and cleaning piece (6), and performing necessary maintenance and replacement.

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