Fiber air duct with return air structure

Abstract

The utility model belongs to the technical field of fibre air pipe, specifically disclose a fibre air pipe with return air structure, including fan assembly, air supply pipeline and return air pipe subassembly, three through the joint component detachable connection. The return air pipe subassembly includes the return air pipeline that has reciprocating screw rod and moving plate in the inside, through motor drive moving plate reciprocating motion, with the effective ventilation area of continuous regulation pipeline bottom air inlet, to realize the flexible control of return air volume. The return air pipeline outer wall still is provided with the rotary cleaning assembly of motor drive, its brush can carry out automatic scraping brush cleaning to air inlet surface, prevent the blockage. The utility model sets up the moving plate and automatic cleaning mechanism cooperation, not only solved the problem that air inlet was easily attached by pollutant and blocked, guaranteed the stability and ventilation efficiency of system long -term operation, reduced the maintenance frequency, also realized the regulation of fibre air pipe return air volume adaptability.

Description

Technical Field

[0001] This application relates to the field of fiber duct technology, and in particular to a fiber duct with a return air structure. Background Technology

[0002] Fiber ductwork, as a common air distribution system, is widely used in large spaces such as industrial plants, commercial venues, and warehouses to achieve uniform air supply. In these applications, to maintain indoor air quality and temperature balance, it is usually necessary to recycle some indoor air back into the system for further processing or circulation. Therefore, ductwork systems with return air structures are particularly important. This type of system can effectively organize airflow and improve energy efficiency.

[0003] However, existing fiber optic ducts with return air structures still have some areas for improvement in practical use. The main problems lie in the implementation of the return air function: traditional return air vents are usually of fixed size, or the adjustment method is relatively crude (such as manual dampers), making it difficult to make precise and continuous airflow adjustments based on the actual number of people in the room, the heat output of equipment, or the required air cleanliness, resulting in energy waste or poor ventilation. In addition, since the return air vents are exposed to the indoor environment for a long time, they are prone to accumulating dust, suspended fibers, and other pollutants, causing blockages. This not only further affects the preset return air volume and reduces system efficiency, but also increases the load on the fan, which may affect the stable operation of the system in the long run and increase the frequency and cost of maintenance and cleaning.

[0004] Therefore, a fiber duct with a return air structure is proposed to solve the technical problem that the return air volume of fiber ducts cannot be adaptively adjusted. Summary of the Invention

[0005] The purpose of this invention is to provide a fiber duct with a return air structure to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a fiber duct with a return air structure, comprising a fan assembly, wherein the fan assembly includes a fan box for ventilation, and both ends of the fan box are provided with snap-fit ​​components, which respectively snap-fit ​​an air supply duct for supplying air and a return air duct assembly for inlet air; a cleaning component is provided on the outer wall of the end of the return air duct assembly away from the snap-fit ​​components; The outer walls of the fan box, air supply duct, and return air duct assembly are all welded with several connecting frames, which are used to install and fix the air ducts.

[0007] According to the above technical solution, the snap-fit ​​assembly includes snap-fit ​​rings that are welded and fixed to the air supply duct and return air duct assembly at the end near the fan box, respectively. The outer wall of the snap-fit ​​ring is welded and fixed with a first limiting ring and a second limiting ring. A sliding column is welded and fixed between the first limiting ring and the second limiting ring. Several conical moving blocks are slidably installed on the sliding column. A clamping tube is welded and fixed to one end of the fan box near the clamping assembly. A groove is opened on the inner wall of the clamping tube. A clamping block is slidably installed in the groove. A return spring is provided between the end of the clamping block near the clamping tube and the groove. The end of the clamping block away from the groove is tapered. The clamping block and the moving block cooperate to clamp the fan box and the clamping assembly.

[0008] According to the above technical solution, the return air duct assembly includes a return air duct welded and fixed to the end of the snap ring away from the fan box. A fixing ring is welded and fixed to the inner wall of the end of the return air duct near the snap assembly. A reciprocating screw is rotatably installed between the fixing ring and the inner wall of the end of the return air duct away from the snap assembly. A movable plate is installed on the outer wall of the reciprocating screw through a slider structure. The outer wall of the movable plate is in contact with the inner wall surface of the return air duct. A guide rod is welded and fixed between the fixed ring and the inner wall of the return air duct at the end away from the snap-fit ​​assembly. The guide rod passes through the movable plate and restricts its movement path. The bottom end of the return air duct has several air inlets located on the movement path of the moving plate.

[0009] A first motor is welded and fixed to the outer wall of the return air duct. The output shaft of the first motor passes through the return air duct and is fixedly installed with a reciprocating screw through a coupling.

[0010] According to the above technical solution, the cleaning component includes a fixed rod rotatably installed on the outer wall of the return air duct. A ring is welded and fixed to the outer wall of the fixed rod away from the return air duct. Several connecting rods are welded and fixed to the outer wall of the ring. A scraper is welded and fixed to the end of the connecting rod near the return air duct. The scraper is sleeved on the outer wall of the return air duct. Several brushes that contact the surface of the air inlet are welded and fixed to the end of the scraper near the return air duct.

[0011] A driven gear is welded and fixed to one end of the fixed rod near the return air duct; A shaft is rotatably mounted on one end of the return air duct near the fixed rod. A drive gear is welded and fixed to the outer wall of the shaft, and the drive gear meshes with the driven gear.

[0012] A bracket plate is welded and fixed to the end of the return air duct near the cleaning component, corresponding to the position of the shaft. A second motor is welded and fixed to the end of the bracket plate away from the shaft. The output shaft of the second motor passes through the bracket plate and is fixedly installed to the shaft through a coupling.

[0013] Compared with the prior art, the beneficial effects achieved by this utility model are: This utility model, (1) The return air volume can be conveniently and continuously adjusted by setting a movable plate: the movable plate is driven by a motor to move back and forth in the return air duct. On the one hand, it supports the inside of the return air duct, and on the other hand, it controls the number of air inlets and the size of the air inlet cavity, and controls the effective ventilation area of ​​the air inlet, so as to adaptively adjust the return air volume according to actual needs.

[0014] (2) The long-term stability and cleanliness are ensured by setting up cleaning components: On the basis of realizing the air volume adjustment function, an automatic rotating cleaning mechanism is integrated, which can remove the blockage at the air inlet regularly or in real time, effectively preventing the return air efficiency from decreasing or even the system from failing due to blockage, and ensuring the long-term smooth air circulation and the stable and efficient operation of the entire air duct system. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the snap-fit ​​assembly structure according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the internal structure of the return air duct assembly according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the cleaning component according to an embodiment of the present invention; In the diagram: 1. Fan assembly; 101. Fan box; 102. Snap-fit ​​pipe; 103. Snap-fit ​​block; 104. Return spring; 2. Snap-fit ​​assembly; 201. Snap-fit ​​ring; 202. First limit ring; 203. Second limit ring; 204. Moving block; 205. Sliding column; 3. Supply air duct; 4. Return air duct assembly; 401. Return air duct; 402. Air inlet; 403. Fixed ring; 404. Reciprocating screw; 405. Guide rod; 406. Moving plate; 407. First motor; 5. Cleaning assembly; 501. Fixed rod; 502. Ring sleeve; 503. Connecting rod; 504. Scraper; 505. Brush; 506. Driven gear; 507. Shaft; 508. Drive gear; 509. Support plate; 510. Second motor; 6. Connecting frame. Detailed Implementation

[0016] The following detailed, non-limiting description of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0017] Please see Figure 1-4 The present invention provides the following technical solution: like Figure 1 As shown, a fiber duct with a return air structure includes a fan assembly 1. The fan assembly 1 includes a fan box 101 for ventilation. Both ends of the fan box 101 are provided with snap-fit ​​components 2, which respectively snap-fit ​​an air supply duct 3 for supplying air and a return air duct assembly 4 for inlet air. A cleaning component 5 is provided on the outer wall of the end of the return air duct assembly 4 away from the snap-fit ​​components 2. The outer walls of the fan box 101, the air supply duct 3, and the return air duct assembly 4 are all welded with several connecting frames 6, which are used to install and fix the air ducts.

[0018] like Figure 2 As shown, the snap-fit ​​assembly 2 includes snap-fit ​​rings 201 that are welded and fixed to the air supply duct 3 and the return air duct assembly 4 at one end near the fan box 101, respectively. A first limiting ring 202 and a second limiting ring 203 are welded and fixed to the outer wall of the snap-fit ​​ring 201. A sliding column 205 is welded and fixed between the first limiting ring 202 and the second limiting ring 203. A plurality of conical moving blocks 204 are slidably installed on the sliding column 205. A clamping tube 102 is welded and fixed to one end of the fan housing 101 near the clamping assembly 2. The inner wall of the clamping tube 102 has a groove, and a clamping block 103 is slidably installed in the groove. A return spring 104 is provided between the end of the clamping block 103 near the clamping tube 102 and the groove. The end of the clamping block 103 away from the groove is tapered. The clamping block 103 cooperates with the moving block 203 to clamp the fan housing 101 and the clamping assembly 2.

[0019] When the fan box 101 and the snap-fit ​​assembly 2 are snapped together, the snap-fit ​​assembly 2 and the fan box 101 are aligned and then fastened together. The bottom conical surface of the snap-fit ​​block 103 slides against the top conical surface of the first limiting ring 202, pushing the snap-fit ​​block 103 to retract into the groove through the return spring 104. The snap-fit ​​block 103 then passes through the first limiting ring 202 and enters the gap between the first limiting ring 202 and the moving block 204. The top of the snap-fit ​​block 103 engages with the bottom of the first limiting ring 202, so that the fan box 101, the air supply duct 3, and the return air duct assembly 4 are snapped and fixed by the snap-fit ​​assembly 2. When disassembly is required, continue moving the air supply duct 3 or return air duct assembly 4 toward the fan box 101. The bottom conical surface of the locking block 103 and the top conical surface of the moving block 204 slide together. The locking block 103 retracts into the groove again. The locking block 103 enters the gap between the moving block 204 and the second limiting ring 203. Then move the air supply duct 3 or return air duct assembly 4 away from the fan box 101. The top conical surface of the locking block 103 and the bottom conical surface of the moving block 204 slide together. Since the moving block 204 is slidably mounted on the sliding column 205, as the locking block 103 retracts inward, it drives the moving block 204 to slide on the sliding column 205 until the top of the moving block 204 engages in the groove opened at the bottom of the first limiting ring 202. The locking block 103 slides past the top of the first limiting ring 202 and disengages.

[0020] like Figure 3 As shown, the return air duct assembly 4 includes a return air duct 401 welded and fixed to the end of the snap ring 201 away from the fan box 101. A fixing ring 403 is welded and fixed to the inner wall of the end of the return air duct 401 near the snap ring 2. A reciprocating screw 404 is rotatably installed between the fixing ring 403 and the inner wall of the end of the return air duct 401 away from the snap ring 2. A moving plate 406 is installed on the outer wall of the reciprocating screw 404 through a slider structure. The outer wall of the moving plate 406 is in contact with the inner wall surface of the return air duct 401. A guide rod 405 is welded and fixed between the fixed ring 403 and the inner wall of the return air duct 401 away from the snap-fit ​​component 2. The guide rod 405 passes through the movable plate 406 and restricts its movement path. The bottom end of the return air duct 401 is provided with several air inlets 402 located on the movement path of the movable plate 406.

[0021] A first motor 407 is welded and fixed to the outer wall of the return air duct 401. The output shaft of the first motor 407 passes through the return air duct 401 and is fixedly installed with the reciprocating lead screw 404 through a coupling.

[0022] In actual operation, the fan box 101 performs return air operation through the return air duct assembly 4, starting the first motor 407. The output shaft of the first motor 407 rotates and drives the reciprocating screw 404 to rotate through the coupling. Since the moving plate 406 is installed on the outer wall of the reciprocating screw 404 through a slider structure, and the guide rod 405 passes through the moving plate 406 to restrict its movement path, the rotation of the reciprocating screw 404 is converted into the reciprocating linear motion of the moving plate 406 along the axial direction of the reciprocating screw 404. During its movement, the outer wall of the movable plate 406 remains in contact with the inner wall of the return air duct 401. On the one hand, it supports the interior of the return air duct 401, and on the other hand, the movable plate 406 divides the return air duct 401 into two cavities. When the movable plate 406 passes the air inlet 402 at the bottom of the return air duct 401, the cavity near the fan box 101 draws outside air into the return air duct 401 through the air inlet 402. The incoming air enters the fan box 101 through the return air duct 401 and the snap-fit ​​assembly 2, and is then sent out by the fan box 101 through the air supply duct 3, completing the return air and air supply cycle.

[0023] The movement of the movable plate 406 within the return air duct 401 determines the size of the cavity at one end near the fan box 101 and partially blocks the air inlet 402. Thus, the position of the movable plate 406 can be adjusted by controlling the first motor 407 according to actual needs, thereby adjusting the opening degree and air volume of the air inlet 402.

[0024] like Figure 4 As shown, the cleaning component 5 includes a fixed rod 501 rotatably mounted on the outer wall of the return air duct 401. A ring 502 is welded to the outer wall of the fixed rod 501 away from the return air duct 401. A plurality of connecting rods 503 are welded to the outer wall of the ring 502. A scraper 504 is welded to the end of the connecting rod 503 near the return air duct 401. The scraper 504 is sleeved on the outer wall of the return air duct 401. A plurality of brushes 505 that contact the surface of the air inlet 402 are welded to the end of the scraper 504 near the return air duct 401.

[0025] A driven gear 506 is welded and fixed to one end of the fixed rod 501 near the return air duct 401; A shaft 507 is rotatably mounted on one end of the return air duct 401 near the fixed rod 501. A drive gear 508 is welded and fixed to the outer wall of the shaft 507, and the drive gear 508 meshes with the driven gear 506.

[0026] A bracket plate 509 is welded and fixed to one end of the return air duct 401 near the cleaning component 5, corresponding to the position of the shaft 507. A second motor 510 is welded and fixed to the other end of the bracket plate 509 away from the shaft 507. The output shaft of the second motor 510 passes through the bracket plate 509 and is fixedly installed to the shaft 507 through a coupling.

[0027] When cleaning of the air inlet 402 of the return air duct assembly 4 is required, the second motor 510 is started. The output shaft of the second motor 510 rotates, driving the shaft 507 to rotate via a coupling. When the shaft 507 rotates, the drive gear 508 welded and fixed to its outer wall rotates synchronously. Since the drive gear 508 meshes with the driven gear 506 at one end of the fixed rod 501, the rotation of the drive gear 508 drives the driven gear 506 and the fixed rod 501 to rotate in a circle around the axis of the return air duct 401. When the fixed rod 501 rotates, the ring 502 at the end away from the return air duct 401 drives the scraper 504 to rotate in a circle around the outer wall of the return air duct 401 via the connecting rod 503. The brush 505, welded and fixed to the inner side of the scraper 504, continuously contacts the surface of the air inlet 402 at the bottom of the return air duct 401 during movement. The sweeping action of the brush 505 cleans away dust, debris, and other contaminants adhering to the surface of the air inlet 402, preventing blockage and ensuring efficient return air circulation. Simultaneously, the scraper 504 itself can also remove larger particles of dirt that may accumulate on the outer wall of the return air duct 401, further ensuring the normal operation of the return air duct assembly 4.

[0028] Working Principle: After the fan assembly 1 is started, the fan inside the fan box 101 operates, driving airflow. The supply air duct 3 delivers the treated air to the target area, while the return air duct assembly 4 is responsible for drawing indoor air into the system. During the return air process, air enters the duct through several air inlets 402 at the bottom of the return air duct 401. By starting the first motor 407 installed on the outer wall of the return air duct 401, the reciprocating screw 404 can be driven to rotate. The slider structure on the reciprocating screw 404 drives the moving plate 406 to move back and forth along the path defined by the guide rod 405. When the moving plate 406 slides to cover part of the air inlet 402, that part of the air inlet 402 is blocked, and the effective return air area is reduced; when the moving plate 406 is moved away, the air inlet 402 is fully exposed, and the return air area is increased, thereby realizing continuous and flexible adjustment of the return air volume.

[0029] Meanwhile, to prevent the air inlet 402 from becoming clogged due to dust, lint, or other debris, the cleaning assembly 5 can be activated. The second motor 510 drives the shaft 507 to rotate, causing the drive gear 508 fixed thereon to rotate as well, which in turn drives the driven gear 506 meshing with it to rotate. The driven gear 506, through the fixed rod 501, drives the outer ring 502, connecting rod 503, and scraper 504 to rotate around the axis of the return air duct 401. The brush 505 fixed to the inner side of the scraper 504 rotates accordingly, continuously scraping the surface of the air inlet 402 to remove the deposits and keep the air inlet 402 unobstructed.

[0030] When it is necessary to install or disassemble the air duct, the connection can be quickly completed using the snap-fit ​​assembly 2. When snapping the fan box 101 and the snap-fit ​​assembly 2, align the snap-fit ​​assembly 2 and the fan box 101 and then snap them together. The bottom conical surface of the snap-fit ​​block 103 slides against the top conical surface of the first limiting ring 202, pushing the snap-fit ​​block 103 to retract into the groove through the return spring 104. The snap-fit ​​block 103 then passes through the first limiting ring 202 and enters the gap between the first limiting ring 202 and the moving block 204. The top of the snap-fit ​​block 103 engages with the bottom of the first limiting ring 202, so that the fan box 101, the air supply duct 3, and the return air duct assembly 4 are snapped and fixed by the snap-fit ​​assembly 2. When disassembly is required, continue moving the air supply duct 3 or return air duct assembly 4 toward the fan box 101. The bottom conical surface of the locking block 103 and the top conical surface of the moving block 204 slide together. The locking block 103 retracts into the groove again. The locking block 103 enters the gap between the moving block 204 and the second limiting ring 203. Then move the air supply duct 3 or return air duct assembly 4 away from the fan box 101. The top conical surface of the locking block 103 and the bottom conical surface of the moving block 204 slide together. Since the moving block 204 is slidably mounted on the sliding column 205, as the locking block 103 retracts inward, it drives the moving block 204 to slide on the sliding column 205 until the top of the moving block 204 engages in the groove opened at the bottom of the first limiting ring 202. The locking block 103 slides past the top of the first limiting ring 202 and disengages.

[0031] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A fiber duct with a return air structure, comprising a fan assembly (1), characterized in that: The fan assembly (1) includes a fan box (101) for ventilation. Both ends of the fan box (101) are provided with snap-fit ​​components (2). A supply air duct (3) for supplying air and a return air duct assembly (4) for inlet air are respectively snapped into the snap-fit ​​components (2). The snap-fit ​​assembly (2) includes snap-fit ​​rings (201) that are welded and fixed to the air supply duct (3) and the return air duct assembly (4) at one end near the fan box (101). A first limiting ring (202) and a second limiting ring (203) are welded and fixed to the outer wall of the snap-fit ​​ring (201). A sliding column (205) is welded and fixed between the first limiting ring (202) and the second limiting ring (203). A plurality of conical moving blocks (204) are slidably installed on the sliding column (205). The fan box (101) is welded and fixed with a clamping pipe (102) at one end near the clamping assembly (2). The inner wall of the clamping pipe (102) has a groove, and a clamping block (103) is slidably installed in the groove. A return spring (104) is provided between the end of the clamping block (103) near the clamping pipe (102) and the groove. The end of the clamping block (103) away from the groove is conical. The clamping block (103) cooperates with the moving block (204) to clamp the fan box (101) and the air supply pipe (3) and the return air pipe assembly (4).

2. The fiber duct with return air structure according to claim 1, characterized in that: The return air duct assembly (4) includes a return air duct (401) welded and fixed to the end of the snap ring (201) away from the fan box (101). A fixing ring (403) is welded and fixed to the inner wall of the end of the return air duct (401) close to the snap assembly (2). A reciprocating screw (404) is rotatably installed between the fixing ring (403) and the inner wall of the end of the return air duct (401) away from the snap assembly (2). A moving plate (406) is installed on the outer wall of the reciprocating screw (404) through a slider structure. The outer wall of the moving plate (406) is in contact with the inner wall surface of the return air duct (401). The bottom end of the return air duct (401) is provided with several air inlets (402) located on the movement path of the movable plate (406).

3. A fiber duct with a return air structure according to claim 2, characterized in that: A guide rod (405) is welded and fixed between the fixed ring (403) and the inner wall of the return air duct (401) away from the snap-fit ​​assembly (2). The guide rod (405) passes through the moving plate (406) and restricts its movement path.

4. A fiber duct with a return air structure according to claim 3, characterized in that: A cleaning component (5) is provided on the outer wall of the end of the return air duct (401) away from the snap-fit ​​component (2); The cleaning component (5) includes a fixed rod (501) rotatably mounted on the outer wall of the return air duct (401). A ring (502) is welded to the outer wall of the fixed rod (501) away from the return air duct (401). A plurality of connecting rods (503) are welded to the outer wall of the ring (502). A scraper (504) is welded to the end of the connecting rod (503) near the return air duct (401). The scraper (504) is sleeved on the outer wall of the return air duct (401). A plurality of brushes (505) that contact the surface of the air inlet (402) are welded to the end of the scraper (504) near the return air duct (401).

5. A fiber duct with a return air structure according to claim 4, characterized in that: A driven gear (506) is welded to one end of the fixed rod (501) near the return air duct (401). The return air duct (401) has a shaft (507) rotatably mounted at one end near the fixed rod (501). A drive gear (508) is welded and fixed to the outer wall of the shaft (507), and the drive gear (508) meshes with the driven gear (506).

6. A fiber duct with a return air structure according to claim 5, characterized in that: The return air duct (401) is welded and fixed with a bracket plate (509) at the end near the cleaning component (5) corresponding to the shaft (507). The bracket plate (509) is welded and fixed with a second motor (510) at the end away from the shaft (507). The output shaft of the second motor (510) passes through the bracket plate (509) and is fixedly installed with the shaft (507) through a coupling.

7. A fiber duct with a return air structure according to claim 6, characterized in that: The outer wall of the return air duct (401) is welded and fixed with a first motor (407). The output shaft of the first motor (407) passes through the return air duct (401) and is fixedly installed with the reciprocating screw (404) through a coupling.

8. A fiber duct with a return air structure according to claim 7, characterized in that: The outer walls of the fan box (101), the air supply duct (3), and the return air duct assembly (4) are all welded with several connecting frames (6), which are used to install and fix the air duct.

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