Low-noise centrifugal pipeline fan

Abstract

The utility model relates to the technical field of pipeline fans, and discloses a low-noise centrifugal pipeline fan which comprises a supporting base, a first motor and a worm type shell are fixedly installed on the top of the supporting base, and the outer edge of a power output shaft of the first motor is fixedly connected with a rotating plate body in a sleeved mode. A mounting block is fixedly assembled at the top of the worm type shell, a silencing assembly is arranged at the top of the mounting block, and through arrangement of the buffer cylinders and the holes, when air flow is conveyed to the second circular groove through the mounting base, the multiple holes formed in the outer walls of the two buffer cylinders in a penetrating mode can disperse, move and absorb the air; accordingly, part of gas sound energy in inner cavities of the two buffer cylinders can be converted into kinetic energy and heat energy of air to be dissipated, airflow noise is effectively reduced, meanwhile, under matched transmission of a rotating wheel, a threaded rod, a sleeve and a trapezoidal block, two plug pins are driven to extend and move into the inner walls of a square groove and a mounting block, and the inner walls of the square groove and the mounting block are protected. Therefore, the whole movable assembly of the silencing assembly is installed.

Description

Technical Field

[0001] This utility model relates to the field of duct fan technology, specifically a low-noise centrifugal duct fan. Background Technology

[0002] Centrifugal duct fans are machines that rely on input mechanical energy to increase gas pressure and discharge gas. Centrifugal duct fans generally consist of a casing, impeller, rotor, and transmission components.

[0003] Existing centrifugal duct fan outlet silencers often use sound-absorbing cotton for noise reduction. However, the sound-absorbing cotton is usually glued to the inside of the silencer housing, making it impossible to remove. Over time, dust will accumulate on the sound-absorbing cotton, making it difficult to clean and affecting the service life of the fan silencer. It will also reduce the noise reduction of the silencer. Therefore, we propose a low-noise centrifugal duct fan. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a low-noise centrifugal duct fan, which has the advantages of reduced noise, portable installation, and easy cleaning, thus solving the problems mentioned in the background technology.

[0005] This utility model provides the following technical solution: a low-noise centrifugal duct fan, including a support base, a motor and a volute housing are fixedly installed on the top of the support base, a rotating plate body is fixedly sleeved on the outer edge of the power output shaft of the motor, an mounting block is fixedly assembled on the top of the volute housing, a sound-absorbing component is provided on the top of the mounting block, a cylinder is fixedly assembled on the outer wall of the volute housing, a filter plate is provided on the inner wall of the cylinder, a circular groove is opened on the inner wall of the cylinder, an arc groove is opened on the inner wall of the circular groove, and a dust removal component is provided on the outer wall of the filter plate;

[0006] The noise reduction assembly includes a pipe body, an installation base fixedly mounted on the inner wall of the pipe body, a buffer cylinder fixedly mounted on the inner wall of the installation base, a hole on the outer wall of the buffer cylinder, a circular groove on the top of the installation base, a square groove on the inner wall of the pipe body, a rotating wheel on the top of the pipe body, a threaded rod fixedly mounted on the bottom of the rotating wheel, a sleeve threadedly connected to the outer wall of the threaded rod, and a trapezoidal block, a pin, and a spring on the inner wall of the square groove.

[0007] As a preferred technical solution of this utility model: the dust removal component includes a support frame body, a second motor is fixedly installed on the outer wall of the support frame body, a cleaning head is fixedly sleeved on the outer edge of the power output shaft of the second motor, a fixing column is fixedly assembled on the outer wall of the support frame body, a second cylinder is fixedly installed on the inner wall of the fixing column, one end of a second spring is fixedly connected to the inner wall of the second cylinder, and a ball is fixedly installed on the other end of the second spring.

[0008] As a preferred technical solution of this utility model: there are two of each of the two cylinders, two springs, and two spheres, and each of the two cylinders, two springs, and two spheres is arranged as a group on both sides of the inner wall of the fixed column. The sphere is located in the inner cavity of the two cylinders, and the outer wall of the sphere is adapted to the inner wall of the arc groove. The outer wall shape of the fixed column is the same as the inner wall shape of the circular groove, and the outer wall of the fixed column is slidably fitted to the inner wall of the circular groove.

[0009] As a preferred technical solution of this utility model: there are two buffer cylinders, and the two buffer cylinders are respectively arranged in parallel in the inner cavity of the mounting base.

[0010] As a preferred technical solution of this utility model: there are several holes, and the holes are respectively connected to the outer wall of the buffer cylinder.

[0011] As a preferred technical solution of this utility model: there are two trapezoidal blocks, and the tops of the two trapezoidal blocks are slidably fitted against the bottom of the sleeve.

[0012] As a preferred technical solution of this utility model: there are two pins and two springs, and the two pins and two springs are symmetrically arranged with the threaded rod as the center. The outer walls of the two pins are connected to the inner walls of the square groove and the mounting block.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This low-noise centrifugal duct fan, through the design of buffer cylinders and holes, allows the airflow to be dispersed and absorbed by the several holes penetrating the outer walls of the two buffer cylinders as it is transmitted through the mounting base to the circular slot. This results in a portion of the acoustic energy of the gas inside the two buffer cylinders being converted into the kinetic and thermal energy of the air and dissipated, effectively reducing airflow noise. At the same time, through the coordinated transmission of the rotating wheel, threaded rod, sleeve, and trapezoidal block, the two pins are driven to extend and move into the inner wall of the square slot and the mounting block, thereby realizing the installation of the entire movable component of the noise reduction assembly.

[0015] 2. This low-noise centrifugal duct fan, driven by motor two, uses a cleaning head to rotate and clean the dust on the outer wall of the filter plate. Simultaneously, through the combined transmission of the ball, spring two, and arc groove, the fixed column drives motor two, the main support frame, the cleaning head, and the cylinder one to disengage, making it more convenient to replace the cleaning head. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic cross-sectional view of the present invention.

[0018] Figure 3 This is a schematic diagram of the pipe noise reduction structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the noise reduction installation structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the dust removal component structure of this utility model;

[0021] Figure 6 This utility model Figure 4 Schematic diagram of the structure at point A in the middle;

[0022] Figure 7 This utility model Figure 5 Schematic diagram of the structure at point B.

[0023] In the diagram: 1. Support base; 2. Motor 1; 3. Rotating plate body; 4. Volute housing; 5. Mounting block; 6. Silencing assembly; 7. Cylinder 1; 8. Filter plate; 9. Arc groove; 10. Circular groove 1; 11. Dust removal assembly;

[0024] 601. Pipe body; 602. Mounting base; 603. Buffer cylinder; 604. Hole; 605. Circular groove II; 606. Square groove; 607. Rotary wheel; 608. Threaded rod; 609. Sleeve; 610. Trapezoidal block; 611. Pin; 612. Spring I;

[0025] 111. Support frame main body; 112. Motor II; 113. Cleaning head; 114. Fixing column; 115. Cylinder II; 116. Spring II; 117. Ball. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1 - Figure 7 A low-noise centrifugal duct fan includes a support base 1. A motor 2 and a volute housing 4 are fixedly installed on the top of the support base 1. A rotating plate body 3 is fixedly sleeved on the outer edge of the power output shaft of the motor 2. An mounting block 5 is fixedly assembled on the top of the volute housing 4. A sound-absorbing component 6 is provided on the top of the mounting block 5. A cylinder 7 is fixedly assembled on the outer wall of the volute housing 4. A filter plate 8 is provided on the inner wall of the cylinder 7. A circular groove 10 is opened on the inner wall of the cylinder 7. An arc groove 9 is opened on the inner wall of the circular groove 10. A dust removal component 11 is provided on the outer wall of the filter plate 8.

[0028] The noise reduction assembly 6 includes a pipe body 601, an mounting base 602 fixedly mounted on the inner wall of the pipe body 601, a buffer cylinder 603 fixedly mounted on the inner wall of the mounting base 602, a hole 604 on the outer wall of the buffer cylinder 603, a circular groove 605 on the top of the mounting base 602, a square groove 606 on the inner wall of the pipe body 601, a rotating wheel 607 on the top of the pipe body 601, a threaded rod 608 fixedly mounted on the bottom of the rotating wheel 607, a sleeve 609 threadedly connected to the outer wall of the threaded rod 608, and a trapezoidal block 610, a pin 611 and a spring 612 respectively on the inner wall of the square groove 606.

[0029] In the above structure, by setting up the motor 2 and the rotating plate body 3, the motor 2 is started, and the outer edge of the power output shaft of the motor 2 drives the rotating plate body 3 to rotate. This allows the gas outside the volute housing 4 to enter the inner cavity of the volute housing 4 through the cylinder 7, and then the gas is transported out through the silencer assembly 6 by the rotation of the rotating plate body 3.

[0030] In a preferred embodiment: the dust removal assembly 11 includes a support frame body 111, a motor 112 is fixedly installed on the outer wall of the support frame body 111, a cleaning head 113 is fixedly sleeved on the outer edge of the power output shaft of the motor 112, a fixing column 114 is fixedly assembled on the outer wall of the support frame body 111, a cylinder 115 is fixedly installed on the inner wall of the fixing column 114, one end of a spring 116 is fixedly connected to the inner wall of the cylinder 115, and a ball 117 is fixedly installed on the other end of the spring 116.

[0031] In a preferred embodiment: there are two cylinders 115, two springs 116 and two balls 117, and each cylinder 115, spring 116 and ball 117 are arranged as a group on both sides of the inner wall of the fixing post 114. The ball 117 is located in the inner cavity of the cylinder 115, and the outer wall of the ball 117 is adapted to the inner wall of the arc groove 9. The outer wall shape of the fixing post 114 is the same as the inner wall shape of the circular groove 10, and the outer wall of the fixing post 114 is slidably fitted to the inner wall of the circular groove 10.

[0032] In the above structure, by configuring the sphere 117, the second cylinder 115, and the cleaning head 113, when the filter plate 8 needs cleaning, the second motor 112 is activated, causing the outer edge of the output shaft of the second motor 112 to drive the cleaning head 113 to rotate. This allows the bottom of the cleaning head 113 to rotate and clean the outer wall of the filter plate 8. Simultaneously, when it is necessary to replace the cleaning head 113 and the filter plate 8, the fixing post 114 is slid along the inner wall of the circular groove 10, allowing... When the fixed column 114 moves, it will cause the ball 117 to disengage from the inner wall of the arc groove 9. When the ball 117 comes into contact with the inner wall of the circular groove 10, the ball 117 will cause the spring 116 to be compressed and move closer to the inner wall of the cylinder 115. This will cause the outer wall of the ball 117 to slide along the inner wall of the circular groove 10, thereby removing the motor 112, the cleaning head 113 and the support frame body 111, and realizing the portable replacement of the cleaning head 113 and the filter plate 8.

[0033] In a preferred embodiment, there are two buffer cylinders 603, and the two buffer cylinders 603 are respectively arranged in parallel in the inner cavity of the mounting base 602;

[0034] In the above structure, by setting the buffer cylinder 603, the two buffer cylinders 603 will buffer and split the gas when the gas is in the inner cavity of the mounting base 602.

[0035] In a preferred embodiment: there are several holes 604, and the several holes 604 are respectively connected to the outer wall of the buffer cylinder 603 through the hole;

[0036] In the above structure, by setting the buffer cylinder 603, when there is gas being transported in the inner cavity of the buffer cylinder 603, the gas in the inner cavity of the buffer cylinder 603 will be dispersed through several holes 604 penetrating the outer wall, so that some of the gas sound energy will be converted into the kinetic energy and heat energy of the air and dissipated, thereby effectively reducing airflow noise.

[0037] In a preferred embodiment: there are two trapezoidal blocks 610, and the tops of the two trapezoidal blocks 610 are slidably fitted against the bottom of the sleeve 609;

[0038] In the above structure, by setting the trapezoidal block 610 and the sleeve 609, when the threaded rod 608 rotates, it will drive the sleeve 609 to move downward, so that when the sleeve 609 moves downward, the bottom of the sleeve 609 will contact the top of the two trapezoidal blocks 610, and the two trapezoidal blocks 610 will move and extend relative to each other.

[0039] In a preferred embodiment: there are two pins 611 and two springs 612, and the two pins 611 and two springs 612 are symmetrically arranged with the threaded rod 608 as the center. The outer wall of the two pins 611 is through the square groove 606 and the inner wall of the mounting block 5.

[0040] In the above structure, by setting the pins 611 and springs 612, when the two pins 611 move relative to each other and extend to the inner wall of the square groove 606 and the mounting block 5, the two springs 612 on the outer wall of the two square grooves 606 will be compressed, thereby realizing the installation of the pipe body 601, mounting base 602, buffer cylinder 603 and circular groove 605 on the top of the volute housing 4.

[0041] Working principle: When the device is in use, the motor 2 is started, which causes the outer edge of the power output shaft of the motor 2 to drive the rotating plate body 3 to rotate. This causes the gas outside the volute housing 4 to enter the inner cavity of the volute housing 4 through the cylinder 7. Then, the rotation of the rotating plate body 3 transmits the gas to the bottom inner cavity of the mounting base 602. When the gas in the inner cavity of the mounting base 602 is discharged outward through the circular groove 605, it will pass through the two buffer cylinders 603. The several holes 604 through the outer wall of the two buffer cylinders 603 will disperse the gas in the inner cavity of the two buffer cylinders 603, so that some of the gas acoustic energy will be converted into the kinetic energy and heat energy of the air and dissipated, thereby reducing airflow noise.

[0042] Meanwhile, when it is necessary to install the circular groove 605, by rotating the rotating wheel 607, the rotating wheel 607 will drive the threaded rod 608 to rotate, and the rotating threaded rod 608 will drive the sleeve 609 on the outer wall to slide along the inner wall of the square groove 606. When the sleeve 609 contacts the top of the two trapezoidal blocks 610, the two trapezoidal blocks 610 will move and extend relative to each other. This will cause the two relatively extended trapezoidal blocks 610 to drive the two pins 611 to extend to the inner wall of the square groove 606 and the mounting block 5. At the same time, the two springs 612 will be compressed under the action of the two pins 611, thereby realizing the installation and fixation of the mounting block 5 and the muffler assembly 6. The entire movable component of the muffler assembly 6 can be disassembled by performing the opposite operation.

[0043] When cleaning the outer wall of the filter plate 8 is required, the motor 112 is started, causing the outer edge of the output shaft of the motor 112 to drive the cleaning head 113 to rotate. The bottom of the cleaning head 113 will rotate and clean the outer wall of the filter plate 8. At the same time, when the cleaning head 113 and the filter plate 8 need to be replaced, the fixing post 114 is slid along the inner wall of the circular groove 10. When the fixing post 114 moves, it will cause the ball 117 to disengage from the inner wall of the arc groove 9. When the ball 117 contacts the inner wall of the circular groove 10, the ball 117 will drive the spring 116 to compress and move towards the inner wall of the cylinder 115. This will cause the outer wall of the ball 117 to slide along the inner wall of the circular groove 10, thereby removing the motor 112, the cleaning head 113 and the support frame body 111, realizing the portable replacement of the cleaning head 113 and the filter plate 8.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-noise centrifugal duct fan, comprising a support base (1), characterized in that: The top of the support base (1) is fixedly installed with a motor (2) and a volute housing (4). The power output shaft of the motor (2) is fixedly sleeved with a rotating plate body (3). The top of the volute housing (4) is fixedly assembled with an installation block (5). The top of the installation block (5) is provided with a noise reduction component (6). The outer wall of the volute housing (4) is fixedly assembled with a cylinder (7). The inner wall of the cylinder (7) is provided with a filter plate (8). The inner wall of the cylinder (7) is provided with a circular groove (10). The inner wall of the circular groove (10) is provided with an arc groove (9). The outer wall of the filter plate (8) is provided with a dust removal component (11). The noise reduction assembly (6) includes a pipe body (601), an installation base (602) is fixedly mounted on the inner wall of the pipe body (601), a buffer cylinder (603) is fixedly mounted on the inner wall of the installation base (602), and a hole (604) is opened on the outer wall of the buffer cylinder (603). The top of the mounting base (602) is provided with a circular groove (605), and the inner wall of the pipe body (601) is provided with a square groove (606); the top of the pipe body (601) is provided with a rotating wheel (607), the bottom of the rotating wheel (607) is fixedly installed with a threaded rod (608), the outer wall of the threaded rod (608) is threaded with a sleeve (609), and the inner wall of the square groove (606) is provided with a trapezoidal block (610), a pin (611) and a spring (612).

2. The low-noise centrifugal duct fan according to claim 1, characterized in that: The dust removal assembly (11) includes a support frame body (111), a motor (112) is fixedly installed on the outer wall of the support frame body (111), a cleaning head (113) is fixedly sleeved on the outer edge of the power output shaft of the motor (112), a fixing column (114) is fixedly assembled on the outer wall of the support frame body (111), a cylinder (115) is fixedly installed on the inner wall of the fixing column (114), one end of a spring (116) is fixedly connected to the inner wall of the cylinder (115), and a ball (117) is fixedly installed on the other end of the spring (116).

3. A low-noise centrifugal duct fan according to claim 2, characterized in that: There are two of each of the two cylinders (115), two springs (116), and two spheres (117), and each cylinder (115), spring (116), and sphere (117) is arranged as a group on both sides of the inner wall of the fixed column (114). The sphere (117) is located in the inner cavity of the cylinder (115), and the outer wall of the sphere (117) is adapted to the inner wall of the arc groove (9). The outer wall shape of the fixed column (114) is the same as the inner wall shape of the circular groove (10), and the outer wall of the fixed column (114) slides in contact with the inner wall of the circular groove (10).

4. A low-noise centrifugal duct fan according to claim 1, characterized in that: There are two buffer cylinders (603), and the two buffer cylinders (603) are respectively arranged in parallel in the inner cavity of the mounting base (602).

5. A low-noise centrifugal duct fan according to claim 1, characterized in that: There are several holes (604), and several holes (604) are respectively connected to the outer wall of the buffer cylinder (603) through the hole.

6. A low-noise centrifugal duct fan according to claim 1, characterized in that: There are two trapezoidal blocks (610) and the tops of the two trapezoidal blocks (610) are slidably fitted against the bottom of the sleeve (609).

7. A low-noise centrifugal duct fan according to claim 1, characterized in that: There are two of each of the pins (611) and springs (612), and the two pins (611) and springs (612) are symmetrically arranged with the threaded rod (608) as the center. The outer walls of the two pins (611) are connected to the square groove (606) and the inner wall of the mounting block (5).

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