A low-noise, high-efficiency dual-channel air intake structure

Abstract

This utility model discloses a low-noise, high-efficiency dual-channel air intake structure, belonging to the field of fan air intake technology. It includes a main pipe, with a first and second air intake pipe symmetrically distributed and fixedly installed on one side of the main pipe. Sound-absorbing cotton is fixedly installed on the inner walls of the main pipe, the first air intake pipe, and the second air intake pipe. Installation tubes are slidably installed inside both the first and second air intake pipes. Two symmetrically distributed clamping plates are fixedly installed on the side of each installation tube away from the main pipe. The first and second air intake pipes are fixedly connected to the two clamping plates on the same side. Filter components are provided inside both installation tubes. This utility model, through the setting of the filter components, effectively removes dust and moisture from the air, helping to maintain air quality. Furthermore, the noise reduction components and sound-absorbing cotton inside the first and second installation tubes help reduce the noise generated when air enters through the first and second air intake pipes, thus improving the equipment's performance.

Description

Technical Field

[0001] This utility model relates to the field of fan air intake technology, and more specifically, to a low-noise, high-efficiency dual-channel air intake structure. Background Technology

[0002] A fan is a machine that uses input mechanical energy to increase gas pressure and discharge gas. It is a type of driven fluid machinery. Fans are widely used in factories, mines, tunnels, cooling towers, vehicles, ships and buildings for ventilation, dust removal and cooling; in boilers and industrial furnaces for ventilation and induced draft; in air conditioning equipment and household appliances for cooling and ventilation; in grain drying and conveying; as a wind source for wind tunnels and for inflating and propelling hovercraft. Fans are usually connected to an air inlet pipe to achieve the effect of air intake and facilitate subsequent use.

[0003] Some existing fan inlet structures lack internal filtration and noise reduction mechanisms, allowing airborne dust to enter the fan and potentially affecting its performance. To address this, we propose a low-noise, high-efficiency dual-channel air inlet structure. Utility Model Content

[0004] To solve the above problems, this utility model provides a low-noise, high-efficiency dual-channel air intake structure, adopting the following technical solution:

[0005] A low-noise, high-efficiency dual-channel air intake structure includes a main pipe, a first air intake pipe and a second air intake pipe that are symmetrically distributed are fixedly installed on one side of the main pipe, sound-absorbing cotton is fixedly installed on the inner walls of the main pipe, the first air intake pipe and the second air intake pipe, and mounting pipes are slidably installed in the first air intake pipe and the second air intake pipe. Two symmetrically distributed clamping plates are fixedly installed on the side of the two mounting pipes away from the main pipe, the first air intake pipe and the second air intake pipe are fixedly connected to the two clamping plates on the same side, filter components are provided in the two mounting pipes, and noise reduction components are provided in the section of the two mounting pipes close to the main pipe.

[0006] Rotating rods are rotatably installed inside both the first and second air inlet pipes. Baffles are fixedly fitted on the side walls of both rotating rods, and sealing rings are fitted on the side walls of both baffles. Support columns are fixedly installed on the side walls of both the first and second air inlet pipes. The tops of the two rotating rods pass through the support columns on the same side and are fixedly fitted with handles. Two symmetrically distributed movable slots are opened at the tops of the two support columns. Positioning components are provided between the support columns and handles on the same side.

[0007] By adopting the above technical solution, when using the equipment, the operator connects the main pipe to the existing fan. The fan generates suction, allowing outside air to enter through the first and second air inlet pipes. The cooperation of the first and second air inlet pipes facilitates multi-channel air intake, which helps maintain the air intake efficiency of the equipment. The inner walls of the main pipe, the first air inlet pipe, and the second air inlet pipe are lined with sound-absorbing cotton, which absorbs the noise generated when the air flows inside the first and second air inlet pipes. Both the first and second air inlet pipes are equipped with installation pipes containing filter components and noise reduction components. These components filter dust in the air, helping to prevent dust from affecting the operation of the fan, and the noise reduction components reduce the noise generated when the air passes through.

[0008] When the filter assembly needs to be replaced, the handle drives the rotating rod on the same side to rotate, which in turn drives the baffle on the same side to rotate. This adjusts the baffle angle, making it easier for the baffle to block the first or second air inlet pipe, thereby closing the first or second air inlet pipe. This facilitates the subsequent disassembly and replacement of one of the filter assemblies and allows the equipment to replace the filter assembly without shutting down the machine, which helps maintain the equipment's performance.

[0009] Furthermore, the filter assembly includes multiple filter plates arranged in a linear array and installed inside the installation tube. An activated carbon plate is provided inside the installation tube. Installation ports are opened on the side walls of both installation tubes. Matching assembly plates are provided in both installation ports. The filter plates and activated carbon plates on the same side are fixedly connected to the inner side of the assembly plates on the same side. Rubber rings are fitted on the side walls of the filter plates and activated carbon plates. Rubber pads are fixedly installed on the top of both assembly plates. Multiple symmetrically distributed rubber blocks are fixedly installed on the bottom of both assembly plates. Grooves matching the rubber blocks on the same side are opened on the inner walls of the bottom ends of the two installation ports.

[0010] By adopting the above technical solution, the filter plates and activated carbon plates installed in the first and second air inlet pipes serve to filter dust and moisture in the air, helping to prevent dust from entering the fan and maintaining the fan's subsequent operating performance. The filter plates and activated carbon plates on the same side are fixed to the mounting plates on the same side using existing fastening technology. The mounting plates and the mounting ports on the side walls of the mounting pipes on the same side are fixed by rubber blocks and grooves. The two mounting pipes are placed inside the first and second air inlet pipes. The mounting plates can be tightly locked with the mounting ports on the same side under the pressure of the inner walls of the first or second air inlet pipes, which helps to maintain the stability of the filter plates and activated carbon plates. The cooperation of rubber blocks and grooves facilitates subsequent disassembly and assembly by the staff.

[0011] Furthermore, two symmetrically distributed inserts are fixedly installed on the side walls of both the filter plate and the activated carbon plate on the same side, and slots matching the inserts on the same side are opened at the bottom of the two assembled plates.

[0012] By adopting the above technical solution, the filter plate and activated carbon plate are fixed to the same side assembly plate with fasteners of the existing technology. The top of the filter plate and activated carbon plate are provided with inserts. The inserts engage with the slots opened on the inner side of the same side assembly plate to position the filter plate and activated carbon plate, which facilitates subsequent fixing.

[0013] Furthermore, the filter plate and activated carbon plate on the same side are both fixedly installed with locking blocks, and the inner walls of the two installation tubes are provided with locking grooves that match the locking blocks on the same side.

[0014] By adopting the above technical solution, both the filter plate and the activated carbon plate are provided with locking blocks on their side walls. The locking blocks engage with the slots opened on the inner wall of the installation tube on the same side, which helps to maintain the stability of the fit between the filter plate, the activated carbon plate and the installation tube on the same side.

[0015] Furthermore, the noise reduction component includes a muffler disposed in two mounting tubes, with an inlet / outlet frame fixedly installed at both ends of the two mufflers. One of the inlet / outlet frames has a mounting ring fixedly installed on the side away from the muffler on the same side, and the two mounting rings are fixedly connected to the opposite side of the mounting tube on the same side.

[0016] By adopting the above technical solution, silencers are installed in both mounting pipes to absorb the noise generated when the wind flows in the first and second air inlet pipes, thereby achieving noise reduction. In addition, inlet and outlet frames are provided on both sides of the silencer to facilitate the flow of air into the silencer. A mounting ring is installed on one side of one of the inlet and outlet frames. The mounting ring and the mounting pipe on the same side are fixed with fasteners of existing technology, which can serve to fix the silencer.

[0017] Furthermore, both mounting rings are fixedly installed with multiple limiting rods arranged in a ring array on the side near the muffler on the same side, and the two mounting tubes are provided with limiting grooves that match the limiting rods on the same side on the side near the main tube.

[0018] By adopting the above technical solution, a limiting rod is provided on one side of the mounting ring. The limiting rod engages with a limiting groove opened on one side of the mounting tube on the same side. The cooperation between the limiting rod and the limiting groove can play the role of positioning the mounting ring, which is convenient for subsequent fixing.

[0019] Furthermore, the positioning component includes a positioning rod that is slidably installed in the movable groove. A spring is fixedly connected between the bottom end of the positioning rod and the inner wall of the bottom end of the movable groove on the same side. Multiple positioning grooves matching the positioning rod on the same side are opened at the bottom ends of the two handles.

[0020] By adopting the above technical solution, when the operator turns the handle, the positioning rod slides in the movable groove on the same side, and the positioning rod pushes the spring on the same side to retract. The positioning rod can move upward under the elastic force of the spring on the same side, so that the positioning rod engages with the positioning groove opened at the bottom of the handle on the same side, which can play the role of positioning handle, which is conducive to maintaining the stability of the baffle after the angle adjustment is completed.

[0021] In summary, this utility model has the following beneficial technical effects:

[0022] (1) In this utility model, the filter components are set to remove dust and water vapor in the air, which helps to maintain the air quality. The first and second mounting pipes are equipped with noise reduction components and sound-absorbing cotton, which helps to reduce the noise generated when the first and second air inlets are inlet, and helps to improve the performance of the equipment.

[0023] (2) In this utility model, the cooperation of the first air inlet pipe and the second air inlet pipe facilitates multi-channel air intake. Both the first air inlet pipe and the second air inlet pipe are equipped with baffles. When it is necessary to replace the filter components, the baffle angle can be adjusted by driving the rotating rod and the baffle on the same side through the handle, thereby blocking the first air inlet pipe or the second air inlet pipe. This enables the equipment to replace the filter components without stopping the machine, which is beneficial to maintaining the operating effect of the equipment. Attached Figure Description

[0024] Figure 1 This is a first-view structural schematic diagram of the low-noise, high-efficiency dual-channel air intake structure of this utility model;

[0025] Figure 2 This utility model features a low-noise, high-efficiency dual-channel air intake structure. Figure 1 Enlarged view of A in the middle;

[0026] Figure 3 This is a second-view structural schematic diagram of the low-noise, high-efficiency dual-channel air intake structure of this utility model;

[0027] Figure 4 This is a cross-sectional view of the low-noise, high-efficiency dual-channel air intake structure of this utility model;

[0028] Figure 5 This utility model features a low-noise, high-efficiency dual-channel air intake structure. Figure 4 Enlarged view of B in the middle;

[0029] Figure 6 This is a cross-sectional view of the mounting pipe in the low-noise, high-efficiency dual-channel air inlet structure of this utility model;

[0030] Figure 7 This is an unfolded view of the baffle, rotating rod, and positioning assembly in the low-noise, high-efficiency dual-channel air intake structure of this utility model.

[0031] Explanation of the labels in the diagram:

[0032] 1. Main pipe; 2. First air inlet pipe; 3. Second air inlet pipe; 4. Handle; 5. Support column; 6. Mounting pipe; 7. Clamping plate; 8. Baffle; 9. Mounting ring; 10. Assembly plate; 11. Movable groove; 12. Spring; 13. Positioning rod; 14. Mounting port; 15. Inlet / outlet frame; 16. Silencer; 17. Filter plate; 18. Activated carbon plate; 19. Rotating rod. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0034] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] The following is in conjunction with the appendix Figure 1-7 The present invention will be described in further detail below.

[0037] Please see Figure 1-7A low-noise, high-efficiency dual-channel air intake structure includes a main pipe 1. A first air intake pipe 2 and a second air intake pipe 3, symmetrically distributed, are fixedly installed on one side of the main pipe 1. Sound-absorbing cotton is fixedly installed on the inner walls of the main pipe 1, the first air intake pipe 2, and the second air intake pipe 3. Installation pipes 6 are slidably installed inside both the first air intake pipe 2 and the second air intake pipe 3. Two symmetrically distributed clamping plates 7 are fixedly installed on the side of each installation pipe 6 away from the main pipe 1. The first air intake pipe 2 and the second air intake pipe 3 are fixedly connected to the two clamping plates 7 on the same side. Filter components are provided inside each of the two installation pipes 6, and the filter components include multiple filters arranged in a linear array. A filter plate 17 is installed inside the installation tube 6. An activated carbon plate 18 is provided inside the installation tube 6. An installation port 14 is opened on the side wall of both installation tubes 6. A matching assembly plate 10 is provided in each of the two installation ports 14. The filter plate 17 and the activated carbon plate 18 on the same side are fixedly connected to the inner side of the assembly plate 10 on the same side. A rubber ring is fitted on the side wall of both the filter plate 17 and the activated carbon plate 18. A rubber pad is fixedly installed on the top of each of the two assembly plates 10. A number of symmetrically distributed rubber blocks are fixedly installed on the bottom of each of the two assembly plates 10. A groove matching the rubber block on the same side is opened on the inner wall of the bottom end of each of the two installation ports 14.

[0038] When using the equipment, the operator connects the main pipe 1 to a conventional fan. The fan generates suction, drawing outside air in through the first air inlet pipe 2 and the second air inlet pipe 3. The combination of the first and second air inlet pipes 2 and 3 facilitates multi-channel air intake, maintaining efficient airflow. The inner walls of the main pipe 1, the first air inlet pipe 2, and the second air inlet pipe 3 are lined with sound-absorbing cotton to absorb noise generated by airflow within them. Both the first and second air inlet pipes 2 and 3 are equipped with mounting pipes 6. The inclusion of filter plates 17 and activated carbon plates 18 within the first and second air inlet pipes 2 and 3 further filters the air. The presence of dust and moisture in the air helps prevent dust from entering the fan, thus maintaining the fan's subsequent operating performance. The filter plate 17, activated carbon plate 18, and assembly plate 10 on the same side are secured using existing technology. The assembly plate 10 and the mounting port 14 on the side wall of the mounting pipe 6 on the same side are fixed together by rubber blocks and grooves. The two mounting pipes 6 are placed inside the first air inlet pipe 2 and the second air inlet pipe 3. The assembly plate 10 can be tightly engaged with the mounting port 14 on the same side under the pressure of the inner wall of the first air inlet pipe 2 or the second air inlet pipe 3, which helps maintain the stability of the filter plate 17 and activated carbon plate 18 installation. The cooperation of the rubber blocks and grooves facilitates subsequent disassembly and assembly by personnel.

[0039] Two symmetrically distributed inserts are fixedly installed on the side walls of both the filter plate 17 and the activated carbon plate 18 on the same side. The bottom of the two assembly plates 10 is provided with slots that match the inserts on the same side. The filter plate 17 and the activated carbon plate 18 are fixed to the assembly plate 10 on the same side by fasteners of the prior art. The top of the filter plate 17 and the activated carbon plate 18 are provided with inserts. The inserts engage with the slots opened on the inner side of the assembly plate 10 on the same side to position the filter plate 17 and the activated carbon plate 18, which facilitates subsequent fixing.

[0040] Both the filter plate 17 and the activated carbon plate 18 on the same side are fixedly installed with locking blocks. The inner walls of the two mounting tubes 6 are provided with slots that match the locking blocks on the same side. The locking blocks on the side walls of both the filter plate 17 and the activated carbon plate 18 are provided with locking blocks. By engaging the locking blocks with the slots on the inner walls of the mounting tubes on the same side, it is beneficial to maintain the stability of the fit between the filter plate 17, the activated carbon plate 18 and the mounting tubes on the same side.

[0041] Both mounting pipes 6 have noise reduction components installed inside the section near the main pipe 1. The noise reduction components include silencers 16 installed inside the two mounting pipes 6. Both ends of the two silencers 16 are fixedly installed with inlet / outlet frames 15. One of the inlet / outlet frames 15 is fixedly installed with a mounting ring 9 on the side away from the silencer 16 on the same side. The two mounting rings 9 are fixedly connected to the opposite side of the mounting pipe 6 on the same side. The silencers 16 installed inside the two mounting pipes 6 absorb the noise generated when the wind flows in the first air inlet pipe 2 and the second air inlet pipe 3, thereby achieving the noise reduction effect. The silencers 16 have inlet / outlet frames 15 on both sides to facilitate the flow of air into the silencers 16. The mounting ring 9 is installed on one side of one of the inlet / outlet frames 15. The mounting ring 9 is fixed to the mounting pipe 6 on the same side by fasteners of the existing technology, which can fix the silencer 16.

[0042] Multiple limiting rods arranged in a ring array are fixedly installed on the side of the two mounting rings 9 near the muffler 16 on the same side. The two mounting tubes 6 have limiting grooves on the side near the main tube 1 that match the limiting rods on the same side. The mounting ring 9 has a limiting rod on one side. By engaging the limiting rod with the limiting groove on the side of the mounting tube 6 on the same side, the mounting ring 9 can be positioned, which is convenient for subsequent fixing.

[0043] Rotating rods 19 are rotatably installed inside both the first air inlet pipe 2 and the second air inlet pipe 3. Baffles 8 are fixedly fitted onto the side walls of both rotating rods 19, and sealing rings are fitted onto the side walls of both baffles 8. Support columns 5 are fixedly installed onto the side walls of both the first air inlet pipe 2 and the second air inlet pipe 3. The tops of both rotating rods 19 pass through the support columns 5 on the same side and are each fixedly fitted with a handle 4. Two symmetrically distributed movable slots 11 are opened at the tops of both support columns 5. Positioning components are provided between the support columns 5 and the handles 4 on the same side. The positioning components include positioning rods 13 slidably installed within the movable slots 11. Springs 12 are fixedly connected between the bottom end of the positioning rods 13 and the inner wall of the bottom end of the movable slots 11 on the same side. Multiple springs 12 are opened at the bottom ends of both handles 4. The positioning rod 13 is matched with the positioning groove. When the operator turns the handle 4, the positioning rod 13 slides in the movable groove 11 on the same side, and the positioning rod 13 pushes the spring 12 on the same side to retract. The positioning rod 13 can move upward under the elastic force of the spring 12 on the same side, so that the positioning rod 13 engages with the positioning groove opened at the bottom of the handle 4 on the same side, thus playing the role of positioning handle 4. This helps to maintain the stability of the baffle 8 after the angle adjustment is completed, and makes it easy for the baffle 8 to block the first air inlet pipe 2 or the second air inlet pipe 3, thereby closing the first air inlet pipe 2 or the second air inlet pipe 3. This facilitates the subsequent disassembly and replacement of one of the filter components, and enables the equipment to replace the filter components without stopping the machine, which helps to maintain the use effect of the equipment.

[0044] The implementation principle of this utility model embodiment is as follows: When the equipment is in use, the operator connects the main pipe 1 to the existing fan. The fan generates suction, which allows outside air to enter through the first air inlet pipe 2 and the second air inlet pipe 3. The cooperation of the first air inlet pipe 2 and the second air inlet pipe 3 facilitates multi-channel air intake, which helps maintain the air intake efficiency of the equipment. The inner walls of the main pipe 1, the first air inlet pipe 2 and the second air inlet pipe 3 are provided with sound-absorbing cotton, which absorbs the noise generated when the air flows inside the first air inlet pipe 2 and the second air inlet pipe 3. The first air inlet pipe 2 and the second air inlet pipe 3 are both provided with installation pipes 6. The installation pipes 6 are provided with filter components and noise reduction components, which filter dust in the air and help prevent dust from affecting the operation of the fan. The noise reduction components reduce the noise generated when the air passes through.

[0045] When the filter assembly needs to be replaced, the handle 4 drives the rotating rod 19 on the same side to rotate, and the rotating rod 19 drives the baffle 8 on the same side to rotate, which can adjust the angle of the baffle 8, making it easier for the baffle 8 to block the first air inlet pipe 2 or the second air inlet pipe 3, thereby closing the first air inlet pipe 2 or the second air inlet pipe 3. This facilitates the subsequent disassembly and replacement of one of the filter assemblies, and allows the equipment to replace the filter assembly without stopping the machine, which helps maintain the equipment's performance.

[0046] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A low-noise high-efficiency double-channel air inlet structure, characterized in that: Includes a main pipe (1), on one side of the main pipe (1) are a first air inlet pipe (2) and a second air inlet pipe (3) that are symmetrically distributed. The inner walls of the main pipe (1), the first air inlet pipe (2) and the second air inlet pipe (3) are all fixedly installed with sound-absorbing cotton. The first air inlet pipe (2) and the second air inlet pipe (3) are both slidably installed with installation pipes (6). On the side of the two installation pipes (6) away from the main pipe (1), two symmetrically distributed clamping plates (7) are fixedly installed. The first air inlet pipe (2) and the second air inlet pipe (3) are fixedly connected to the two clamping plates (7) on the same side. The two installation pipes (6) are both provided with filter components. The section of the two installation pipes (6) close to the main pipe (1) is provided with noise reduction components. Rotating rods (19) are rotatably installed inside the first air inlet pipe (2) and the second air inlet pipe (3). Baffles (8) are fixedly sleeved on the side walls of the two rotating rods (19). Sealing rings are sleeved on the side walls of the two baffles (8). Support columns (5) are fixedly installed on the side walls of the first air inlet pipe (2) and the second air inlet pipe (3). The top ends of the two rotating rods (19) pass through the support columns (5) on the same side and are fixedly installed with handles (4). Two symmetrically distributed movable slots (11) are opened at the top ends of the two support columns (5). Positioning components are provided between the support columns (5) and the handles (4) on the same side.

2. The low-noise and high-efficiency double-channel air inlet structure according to claim 1, characterized in that: The filter assembly includes multiple filter plates (17) arranged in a linear array and installed in the installation tube (6). An activated carbon plate (18) is provided in the installation tube (6). The side walls of the two installation tubes (6) are provided with installation ports (14). The two installation ports (14) are provided with matching assembly plates (10). The filter plates (17) and activated carbon plates (18) on the same side are fixedly connected to the inner side of the assembly plates (10) on the same side. The side walls of the filter plates (17) and activated carbon plates (18) are fitted with rubber rings. The top of the two assembly plates (10) is fixedly installed with rubber pads. The bottom of the two assembly plates (10) is fixedly installed with multiple symmetrically distributed rubber blocks. The inner walls of the bottom ends of the two installation ports (14) are provided with grooves that match the rubber blocks on the same side.

3. The low-noise and high-efficiency double-channel air inlet structure according to claim 2, characterized in that: The filter plate (17) and activated carbon plate (18) on the same side are each fixedly installed with two symmetrically distributed inserts, and the bottom of the two assembly plates (10) are provided with slots that match the inserts on the same side.

4. The low-noise and high-efficiency double-channel air inlet structure according to claim 2, characterized in that: Both the filter plate (17) and the activated carbon plate (18) on the same side are fixedly installed with locking blocks, and the inner walls of the two mounting tubes (6) are provided with locking grooves that match the locking blocks on the same side.

5. The low-noise and high-efficiency double-channel air inlet structure according to claim 1, characterized in that: The noise reduction assembly includes a muffler (16) disposed in two mounting tubes (6). Both ends of the two mufflers (16) are fixedly installed with inlet and outlet frames (15). One of the inlet and outlet frames (15) is fixedly installed with a mounting ring (9) on the side away from the muffler (16) on the same side. The two mounting rings (9) are fixedly connected to the opposite side of the mounting tube (6) on the same side.

6. The low-noise and high-efficiency double-channel air inlet structure according to claim 5, characterized in that: Both mounting rings (9) are fixedly mounted with multiple limiting rods arranged in a ring array on the side of the muffler (16) on the same side. The two mounting tubes (6) are provided with limiting grooves that match the limiting rods on the same side on the side of the main tube (1).

7. The low-noise and high-efficiency double-channel air inlet structure according to claim 1, characterized in that: The positioning component includes a positioning rod (13) that is slidably installed in the movable groove (11). A spring (12) is fixedly connected between the bottom end of the positioning rod (13) and the inner wall of the bottom end of the movable groove (11) on the same side. The bottom ends of the two handles (4) are provided with multiple positioning grooves that match the positioning rod (13) on the same side.

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