A noise reduction housing and a silent fan using the housing

Abstract

The present application relates to a noise-reducing housing and a silent fan employing the housing, which relates to the field of fan equipment. The housing comprises sound-insulating cotton, a housing, the sound-insulating cotton disposed on the inner sidewall of the housing, a mounting net connected to the housing, the sound-insulating cotton positioned between the mounting net and the inner sidewall of the housing, and an air outlet disposed between the two ends of a sound-insulating groove. The present application reduces noise generated by air impacting the housing, improves the sound insulation effect of the sound-insulating cotton, and simultaneously enhances aesthetics, increases the strength and rigidity of components at the air intake, and enhances operational stability.

Description

Technical Field

[0001] The present application relates to the field of fan equipment, and in particular to a noise reduction casing and a silent fan using the casing. Background Art

[0002] At present, with the increasing application of fans in daily life, the noise generated by fans has gradually attracted everyone's attention. The noise generated by the normal operation of the fan has a great impact on the surrounding acoustic environment. Therefore, it is necessary to take necessary noise reduction measures to meet the emission standards stipulated by national environmental protection regulations.

[0003] In the noise reduction treatment of traditional fans, a layer of sound insulation cotton is often installed between the inner and outer shells of the shell. When the noise generated inside the shell is transmitted outward through the shell, the noise is absorbed by the sound insulation cotton during the transmission process, thereby reducing the noise outside the shell. However, the sound insulation cotton set up in this way cannot affect the generation of noise inside the shell, so the sound insulation degree of this kind of sound insulation cotton is limited and the sound insulation effect is poor. Summary of the Invention

[0004] In order to improve the problem that the sound insulation cotton cannot affect the generation of noise inside the shell, resulting in poor sound insulation effect of the sound insulation cotton, the present application provides a noise reduction shell and a silent fan using the shell.

[0005] On the one hand, the present application provides a noise reduction housing adopting the following technical solutions:

[0006] A noise reduction casing includes sound insulation cotton and a shell, wherein the sound insulation cotton is arranged on the inner wall of the shell; and a mounting net, wherein the mounting net is connected to the shell, and the sound insulation cotton is located between the mounting net and the inner wall of the shell.

[0007] By adopting the above technical solution, when the sound insulation cotton is installed, the installation net fixes the sound insulation cotton on the inner wall of the shell. When the air flows in the shell, the air passes through the installation net and hits the sound insulation cotton. Compared with the way the air directly hits the inner wall of the shell, the air hitting the sound insulation cotton can better reduce the noise generated by the air hitting the inside of the shell, thereby improving the sound insulation effect of the sound insulation cotton.

[0008] In a specific possible implementation scheme, the shell is provided with a sound insulation groove and an air outlet that pass through the inside and outside, the air outlet is located between the two ends of the sound insulation groove, the sound insulation cotton is located in the sound insulation groove, and the shell is provided with a sound insulation cover for sealing the sound insulation groove.

[0009] By adopting the above technical solution, the sound insulation cotton is placed in the sound insulation groove, and then the sound insulation groove is sealed with a sound insulation cover, the thickness of the sound insulation cotton installed on the shell is increased, the sound insulation effect of the sound insulation cotton is improved, and the air outlet is set between the two ends of the sound insulation groove, thereby improving the overall aesthetics of the casing.

[0010] In a specific possible implementation scheme, the sound insulation cover includes an intermediate cover and two end covers, each of the end covers is detachably connected to the shell, the intermediate cover is provided with a pulling unit for pulling the sound insulation cotton out from one of the end covers, and the intermediate cover is provided with an installation unit for pulling the sound insulation cotton into the sound insulation groove, and each of the end covers is connected to the intermediate cover through a sealing assembly.

[0011] By adopting the above technical solution, when the sound insulation cotton is disassembled and replaced, the two end covers are removed, and then the sound insulation cotton is pulled out from one end of the middle cover through the pulling unit, and then the sound insulation cotton is dusted or replaced, and then the sound insulation cotton is installed into the middle cover and the sound insulation groove through the installation unit, and then the two end covers are installed, and the two end covers and the middle cover are sealed by the sealing assembly, thereby effectively avoiding the need to remove the entire sound insulation cover when replacing the sound insulation cotton, thereby improving the convenience of replacing and cleaning the sound insulation cotton.

[0012] In a specific embodiment, the pulling unit includes a pull strip arranged on the sound insulation cotton, the pull strip is arranged on a side of the sound insulation cotton away from the mounting net, and the pull strip is arranged along the length direction of the sound insulation cotton;

[0013] The mounting unit includes a reel and a winding rope. The reel is rotatably arranged on the housing. One end of the winding rope is fixed to the reel, and the other end of the winding rope is detachably connected to the pull rod.

[0014] By adopting the above technical solution, when pulling out the sound insulation cotton, the winding rope is first installed on the pull rod, and then the operator pulls the pull rod from one end of the middle cover to pull out the sound insulation cotton. At this time, the winding rope moves from one end of the middle cover to the other end along with the sound insulation cotton, and then the winding rope is removed from the sound insulation cotton, and then the winding rope is installed on the new sound insulation cotton, and then the reel is wound, and the winding rope drives the sound insulation cotton from one end of the middle cover to the other end, thereby realizing the disassembly and installation of the sound insulation cotton and improving the convenience of disassembly and installation of the sound insulation cotton.

[0015] In a specific feasible implementation scheme, a dust removal box is detachably provided on the pull strip, and the dust removal box is slidably arranged with the sound insulation cover. The dust removal box is located at one end of the sound insulation cotton close to the reel, and a rack is provided on the inner wall of the shell. A rotating gear meshing with the rack is provided in the dust removal box, and a cam is coaxially fixed on the rotating gear. A collision rod for hitting the mounting net is slidingly provided in the dust removal box, and a push rod for being pushed by the cam is provided on the collision rod. The cam pushes the push rod so that the collision rod moves in a direction away from the mounting net, and an extrusion spring for pushing the collision rod to hit the mounting net is provided in the dust removal box.

[0016] By adopting the above technical solution, when the old sound insulation cotton is pulled out from the sound insulation groove, the dust removal box is installed on the end of the sound insulation cotton close to the reel. At this time, the rotating gear on the dust removal box is engaged with the rack. As the operator pulls the sound insulation cotton, the rotating gear rotates along the rack and drives the cam to rotate. The cam drives the push rod to move away from the installation net. At this time, the extrusion spring contracts. As the cam rotates, the cam disengages from the push rod. At this time, the extrusion spring pushes the impact rod to hit the installation net, thereby vibrating off the dust attached to the installation net and cleaning the dust on the installation net.

[0017] In a specific possible implementation scheme, a vacuum cleaner is provided on the outside of the shell, the suction end of the vacuum cleaner is connected to the dust removal box through a hose, and a vent is provided on the side wall of the dust removal box.

[0018] By adopting the above technical solution, when the sound insulation cotton drives the dust removal box to move, the vacuum cleaner sucks away the dust falling from the installation net and the dust in the sound insulation cover through the hose, thereby achieving dust cleaning and collection.

[0019] In a specific embodiment, a support hoop is provided on the inner side wall of the soundproof cover, and the middle cover is inserted into the end cover;

[0020] The sealing assembly includes a sealing strip and a fixing bolt. The sealing strip is located between the middle cover and the end cover. The fixing bolt passes through the middle cover, the end cover and the sealing strip. The fixing bolt is inserted into the support hoop and is threadedly connected to the support hoop.

[0021] By adopting the above technical solution, after the new sound insulation cotton is installed, the two end covers are installed. First, the two end covers are placed on the shell so that the middle cover is inserted into the end cover. At this time, the sealing strip is located between the middle cover and the end cover. Then, the fixing bolts are screwed in. The fixing bolts pass through the end cover, the sealing strip, the middle cover and are inserted into the support hoop. The fixing bolts press the middle cover and the end cover against the sealing strip, thereby achieving sealing between the end cover and the middle cover, and improving the overall sealing of the shell.

[0022] On the other hand, an embodiment of the present application also provides a silent fan adopting the following technical solution.

[0023] A silent fan comprises a noise reduction casing, wherein the casing is provided with an air suction port and an air guide and noise reduction member.

[0024] By adopting the above technical solution, when the fan is working, air is sucked in from the air inlet. When the air is sucked in, the noise generated by the air suction can be reduced through the air guide and noise reduction component.

[0025] In a specific possible implementation scheme, the air guide and noise reduction component includes an air guide frame arranged at the air suction port.

[0026] By adopting the above technical solution, the air turbulence at the air inlet can be reduced through the air guide frame, making the air entering the fan more stable, thereby reducing the noise generated by the air.

[0027] In a specific possible implementation scheme, the air guide and noise reduction component includes an air guide net arranged at the air suction port.

[0028] By adopting the above technical solution, the air is affected by the air guide net at the air intake, so that the air enters the fan along the air guide net, reducing the collision of the air at the air intake, thereby reducing the noise generated by the fan.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. When installing the sound insulation cotton, the mounting net fixes the sound insulation cotton to the inner wall of the housing. When air flows inside the housing, the air passes through the mounting net and hits the sound insulation cotton. Compared with the method of air directly hitting the inner wall of the housing, the air hitting the sound insulation cotton can better reduce the noise generated by the air impact inside the housing, thereby improving the sound insulation effect of the sound insulation cotton. By setting the air intake between the two ends of the sound insulation groove, the aesthetics of the housing can be improved.

[0031] 2. When replacing the sound insulation cotton, remove the two end covers, then install the winding rope and dust box to one end of the sound insulation cotton. Then the operator pulls out the sound insulation cotton through the pull rod. The sound insulation cotton pulls the dust box to move. The cam in the dust box drives the impact rod to continuously impact the installation net, shaking off the dust on the installation net. Then the vacuum cleaner collects and cleans the dust through the hose and dust box, effectively avoiding the need to remove the entire sound insulation slot, thereby improving the convenience of replacing the sound insulation cotton.

[0032] 3. The air is affected by the air guide net at the air inlet, so that the air enters the fan along the air guide net, reducing the collision of the air at the air inlet, thereby reducing the noise generated by the fan, and at the same time improving the strength and rigidity of the component installation at the air inlet and improving the stability of the component operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a structural schematic diagram of a noise reduction housing according to Example 1 of the present application.

[0034] Figure 2 It is a cross-sectional view used to show the sound insulation cotton.

[0035] Figure 3 This is a structural schematic diagram of a noise reduction housing according to Example 2 of the present application.

[0036] Figure 4 yes Figure 3 Enlarged view of part A in the middle.

[0037] Figure 5 It is used to show the exploded view of the connection structure between the dust removal box and the pull rod.

[0038] Figure 6 It is along Figure 3 Cross-sectional view along line BB.

[0039] Figure 7 It is a cross-sectional view used to show the internal structure of the dust removal box.

[0040] Figure 8 This is a cross-sectional view showing the dust removal box inserted into the intermediate cover.

[0041] Figure 9 It is a schematic diagram used to show the structure of the end shield installed on the shell.

[0042] Figure 10 It is along Figure 9 Cross-sectional view along the CC line.

[0043] Figure 11 This is a structural diagram of a silent fan in Example 3 of the present application.

[0044] Figure 12 This is a structural diagram of a silent fan in Example 4 of the present application.

[0045] Explanation of reference numerals: 1. housing; 11. air outlet; 12. sound insulation groove; 2. sound insulation cotton; 3. mounting net; 4. sound insulation cover; 41. middle cover; 42. end cover; 43. slot; 5. pulling unit; 51. pull bar; 6. mounting unit; 61. rotating bracket; 62. reel; 63. winding rope; 64. dust removal box; 641. rotating gear; 642. rotating shaft; 643. cam; 644. impact rod; 645. push rod; 646. extrusion spring; 647 , retaining ring; 648, mounting frame; 649, slider; 65, rack; 66, sliding groove; 67, vent; 68, vacuum cleaner; 69, hose; 7, sealing assembly; 71, sealing strip; 72, fixing bolt; 73, support hoop; 81, working chamber; 82, motor; 83, impeller; 84, air suction port; 85, mounting ring; 86, air guide and noise reduction component; 861, air guide frame; 862, air guide plate; 863, air guide net; 864, rib; 865, wind shield. DETAILED DESCRIPTION

[0046] On the one hand, embodiments of the present application disclose a noise reduction housing.

[0047] Example 1

[0048] Reference Figure 1 、 Figure 2 A noise reduction casing includes a shell 1 and sound insulation cotton 2. The shell 1 is a teapot shape. An air outlet 11 is provided at one end of the shell 1. A sound insulation groove 12 is provided on the inner wall of the shell 1. The sound insulation groove 12 penetrates to the outer surface of the shell 1. The sound insulation groove 12 is arranged along the circumference of the shell 1. The air outlet 11 is arranged between the two ends of the sound insulation groove 12. The two ends of the side wall of the sound insulation groove 12 are provided with chamfers. The sound insulation cotton 2 is arranged in the sound insulation groove 12 and matches the sound insulation groove 12 concave and convex. One side of the sound insulation cotton 2 extends out of the sound insulation groove 12 toward the outside of the shell 1. A mounting net 3 is provided on the inner wall of the shell 1. The mounting net 3 covers the sound insulation groove 12 and is riveted to the shell 1. A sound insulation cover 4 is provided on the outer wall of the shell 1. The sound insulation cover 4 completely covers the sound insulation groove 12. The sound insulation cotton 2 is located in the sound insulation cover 4 and is riveted to the shell 1.

[0049] The implementation principle of Example 1 is: when the air rotates in the shell 1, the rotation of the air will collide with the inner wall of the shell 1 and generate noise. This solution replaces the collision between the air and the inner wall of the shell 1 with the collision between the air and the sound insulation cotton 2, so that the noise generated by the collision between the air and the sound insulation cotton 2 is absorbed by the sound insulation cotton 2, thereby reducing the noise generated when the air collides in the shell 1 and improving the sound insulation effect of the sound insulation cotton 2.

[0050] By extending the sound insulation cotton 2 outward, the thickness of the sound insulation cotton 2 is increased, thereby improving the sound insulation effect of the sound insulation cotton 2. The installation net 3 and the sound insulation cover 4 complete the fixation of the sound insulation cotton 2; the air outlet 11 is set between the two ends of the sound insulation groove 12, which can improve the overall aesthetics of the casing.

[0051] Example 2

[0052] Reference Figure 3 The difference between this embodiment and embodiment 1 is that the sound insulation cover 4 includes an intermediate cover 41 and two end covers 42. The intermediate cover 41 is riveted to the shell 1, and each end cover 42 is detachably connected to the shell 1. The detachable connection in this embodiment is a screw connection, and in other embodiments it can also be connected by bolts. The inner hole of each end cover 42 is larger than the inner hole of the intermediate cover 41 so that the intermediate cover 41 can be inserted into the end cover 42. The sound insulation cotton 2 is provided with a pulling unit 5 for pulling out the sound insulation groove 12, and the outer side of the shell 1 is provided with an installation unit 6 for pulling the sound insulation cotton 2 into the sound insulation groove 12 and installing it. Each end cover 42 is connected to the intermediate cover 41 through a sealing assembly 7.

[0053] With the long-term use of the sound insulation cotton 2, the surface of the sound insulation cotton 2 and the holes in the middle will be clogged with dust, thereby reducing the sound insulation effect of the sound insulation cotton 2. Therefore, the sound insulation cotton 2 needs to be dusted or replaced. This embodiment adopts the replacement of the sound insulation cotton 2. When disassembling the original sound insulation cotton 2, the two end covers 42 are first disassembled, and then the operator uses the pulling unit 5 to pull the sound insulation cotton 2 out of the sound insulation groove 12, and pull out the middle cover 41, and install the new sound insulation cotton 2 in the sound insulation groove 12 and the middle cover 41 through the installation unit 6, and then the two end covers 42 are sealed and installed with the middle cover 41 through the sealing assembly 7, thereby completing the replacement of the sound insulation cotton 2 and improving the convenience of replacing the sound insulation cotton 2.

[0054] Reference Figure 3 The pulling unit 5 includes a pull strip 51 arranged on the sound insulation cotton 2, and the pull strip 51 is arranged on the side of the sound insulation cotton 2 away from the mounting net 3. The pull strip 51 is arranged along the length direction of the sound insulation cotton 2, and the pull strip 51 is a hard plastic strip with a certain flexibility. The pull strip 51 extends out of the sound insulation cotton 2 and is glued to the sound insulation cotton 2. The sound insulation cotton 2 is provided with a slot 43 for the pull strip 51 to be inserted. A rotating bracket 61 is provided on the shell 1, and the rotating bracket 61 is arranged at an end cover 42. The installation unit 6 includes a reel 62 and a winding rope 63. The reel 62 is rotatably arranged on the rotating bracket 61, and the winding rope 63 is wound on the reel 62. One end of the winding rope 63 is fixedly connected to the reel 62, and the other end of the winding rope 63 is detachably connected to the pull strip 51. In this embodiment, the winding rope 63 is hooked with the pull strip 51 by a hook, and in other embodiments, it can also be connected by a snap buckle.

[0055] When disassembling the sound insulation cotton 2, first open the two end covers 42, then install the winding rope 63 on one end of the pull strip 51, and then the operator pulls the other end of the pull strip 51 to pull the sound insulation cotton 2 out of the sound insulation groove 12 from the opening of the end cover 42, and then the pull strip 51 pulls the winding rope 63 from one end of the middle cover 41 to the other end, and then installs the winding rope 63 on the pull strip 51 on the replaced new sound insulation cotton 2, and then by rotating the reel 62, the reel 62 drives the winding rope 63 to reel, and the winding rope 63 pulls the sound insulation cotton 2 into the sound insulation groove 12, thereby realizing the disassembly and installation of the sound insulation cotton 2.

[0056] Reference Figure 3 、 Figure 4 and Figure 5 The pull strip 51 is connected to a dust removal box 64 at one end close to the reel 62. The dust removal box 64 is detachably connected to the pull strip 51. In this embodiment, the dust removal box 64 and the pull strip 51 are connected by a card slot and a card block. In other embodiments, they can be connected by screws.

[0057] Reference Figure 6 、 Figure 7 and Figure 8 , a rack 65 is provided on the inner side wall of the middle cover 41, and the rack 65 is arranged along the length direction of the middle cover 41. A rotating gear 641 is provided in the dust removal box 64, which is meshed with the rack 65. The rotating gear 641 is rotatably arranged with the dust removal box 64 through a rotating shaft 642. A cam 643 is fixed on the rotating shaft 642. A collision rod 644 is slidingly provided in the dust removal box 64. One end of the collision rod 644 extends out of the dust removal box 64 and hits the installation net 3. A push rod 645 is provided at the other end of the collision rod 644. The raised portion of the cam 643 pushes the push rod 645 to make the collision rod 644 slide in the direction away from the installation net 3. An extrusion spring 646 is sleeved on the collision rod 644, and the collision A retaining ring 647 is provided on the striking rod 644, and a mounting frame 648 is provided in the dust removal box 64. The impact rod 644 passes through the mounting frame 648 and is slidably arranged with the mounting frame 648. One end of the extrusion spring 646 is fixedly connected to the mounting frame 648, and the other end of the extrusion spring 646 is fixedly arranged with the retaining ring 647. When the protrusion on the cam 643 pushes the push rod 645 to move, the extrusion spring 646 contracts. When the protrusion is disengaged from the push rod 645, the extrusion spring 646 pushes the impact rod 644 to hit the mounting net 3. A sliding groove 66 is provided on the inner side wall of the middle cover 41, and a slider 649 for sliding in the sliding groove 66 is provided on the dust removal box 64. The slider 649 is a T-shaped block.

[0058] Reference Figure 3 、 Figure 7, a plurality of ventilation holes 67 are provided in the dust removal box 64. The ventilation holes 67 are provided on the bottom wall and the side wall of the dust removal box 64. A dust collector 68 is provided outside the housing 1. The suction end of the dust collector 68 is provided with a hose 69. The other end of the hose 69 is inserted into the dust removal box 64 and is communicatively arranged with the dust removal box 64.

[0059] When disassembling the sound insulation cotton 2, when the winding rope 63 is installed on the pulling bar 51, the dust removal box 64 is installed on the pulling bar 51. Then, as the pulling bar 51 is pulled, the slider 649 is inserted into the sliding groove 66, and the rotating gear 641 meshes with the rack 65. Then, as the dust removal box 64 slides, the rotating gear 641 rotates along the rack 65 and at the same time drives the cam 643 to rotate. The protrusion of the cam 643 pushes the push rod 645 to slide in a direction away from the mounting net 3. At this time, the compression spring 646 contracts. Then, as the cam 643 rotates, the protrusion of the cam 643 disengages from the push rod 645, so that the compression spring 646 pushes the impact rod 644 to slide in the direction of the mounting net 3, causing the impact rod 644 to impact the mounting net 3. The dust on the mounting net 3 falls off under the impact of the impact rod 644, thus realizing the cleaning of the dust on the mounting net 3. Then, the dust collector 68 sucks the dust through the hose 69 and the dust removal box 64, thus realizing the cleaning of the dust in the middle cover 41. When the sound insulation cotton 2 is pulled out from the sound insulation groove 12, the dust removal box is removed from the pulling bar 51, and the hose 69 is removed from the dust removal box 64. Then, the hose 69 is pulled out from the middle cover 41.

[0060] Refer to Figure 9 , Figure 10 , the sealing component 7 includes a sealing strip 71 and a fixing bolt 72. A support hoop 73 is fixedly provided in the middle cover 41. The support hoop 73 supports the side wall of the middle cover 41. The sealing strip 71 is a rubber strip. The sealing strip 71 is in a U shape. The sealing strip 71 is arranged between the middle cover 41 and the end cover 42. The fixing bolt 72 sequentially passes through the end cover 42, the sealing strip 71, the middle cover 41 and into the support hoop 73. The fixing bolt 72 is threadedly connected to the support hoop 73.

[0061] When installing the two end covers 42, first place the sealing strip 71 on the middle cover 41, and then place the end cover 42 on the housing 1, so that the middle cover 41 is inserted into the end cover 42 and the sealing strip 71 is arranged between the end cover 42 and the middle cover 41. Then, screw the fixing bolt 72 into the end cover 42, so that both the middle cover 41 and the end cover 42 are in tight contact with the sealing strip 71, thereby realizing the sealing between the middle cover 41 and the end cover 42 and improving the sealing performance of the housing 1.

[0062] The implementation principle of Example 2 is as follows: when replacing the sound insulation cotton 2, first remove the two end covers 42, then lift the sound insulation cotton 2 from the sound insulation groove 12, and then install the winding rope 63 on the pull bar 51, and then install the dust removal box 64 on the pull bar 51. Then the operator pulls the pull bar 51, and the pull bar 51 drives the sound insulation cotton 2 to move. At the same time, the slider 649 on the dust removal box 64 is inserted into the sliding groove 66, and the rotating gear 641 engages with the rack 65. As the dust removal box 64 continues to slide, the rotating gear 641 drives the cam 643 to rotate, and the cam 643 drives the push rod 645 to move away from the mounting net 3. The extrusion spring 646 contracts, and then the cam 643 disengages from the push rod 645. The extrusion spring 646 pushes the impact rod 644 to hit the mounting net 3, thereby shaking off the dust on the mounting net 3, and then the dust in the middle cover 41 is collected and cleaned by the vacuum cleaner 68.

[0063] The operator pulls the sound insulation surface out of the sound insulation groove 12 through the pull rod 51, replaces the sound insulation cotton 2, and then installs the rope 63 on the new sound insulation cotton 2. Then, the reel 62 is rotated to shrink the rope 63. The rope 63 pulls the sound insulation cotton 2 into the sound insulation groove 12, thereby completing the installation of the sound insulation cotton 2.

[0064] Then place the two end covers 42 on the shell 1, then pass the fixing bolts 72 through the end covers 42, the sealing strip 71 and the middle cover 41, and screw them into the support hoop 73, screw the fixing bolts 72 so that the end covers 42 and the middle cover 41 are pressed against the sealing strip 71, thereby achieving sealing of the end covers 42 and the middle cover 41 and improving the sealing performance of the shell 1.

[0065] On the other hand, an embodiment of the present application also provides a silent fan.

[0066] Example 3

[0067] Reference Figure 11A silent fan includes a noise reduction housing, a working chamber 81 for squeezing gas is provided in the housing 1, a motor 82 is provided on the housing 1, the output shaft of the motor 82 is inserted into the working chamber 81, and an impeller 83 is coaxially fixed at one end of the output shaft of the motor 82 inserted into the working chamber 81, an air suction port 84 is provided on the housing 1, a mounting ring 85 is provided on the housing 1, the mounting ring 85 is located at the air suction port 84, and an air guide noise reduction member 86 is provided on the mounting ring 85. In this embodiment, the air guide noise reduction member 86 includes an air guide frame 861 The air guide frame 861 is arranged along the air flow direction on the mounting ring 85. The air guide frame 861 is composed of multiple air guide plates 862 overlapped with each other. The air guide frame 861 divides the air inlet duct into multiple air ducts, so that the air can enter the fan through multiple air ducts, effectively avoiding the collision of air in a single air duct, thereby reducing the noise at the fan air inlet. By arranging the air guide and noise reduction component 86 at the air intake port 84, the stiffness and strength of the components at the air intake port 84 can be improved, and the stability of the component operation can be improved.

[0068] Example 4

[0069] Reference Figure 12 The difference between this embodiment and embodiment 3 is that, in this embodiment, the air guide and noise reduction component 86 includes an air guide net 863, which is tapered, and the inner diameter of the air guide net 863 gradually decreases from the upstream to the downstream where the air enters the fan, and the air guide net 863 is connected to the mounting ring 85 by a rib 864. A wind shield 865 is provided on the air guide net 863, so that the fan adopts a side air intake method. When air enters the fan, air from different directions is blocked by the air guide net 863 at the air intake port 84, which effectively reduces the mutual collision between the flowing air, thereby reducing the noise generated at the air intake port 84 of the fan.

[0070] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A noise reduction housing, comprising sound insulation cotton (2), characterized in that: Also includes: A housing (1), wherein the sound insulation cotton (2) is arranged on the inner side wall of the housing (1); A mounting net (3), the mounting net (3) being connected to the housing (1), the sound insulation cotton (2) being located between the mounting net (3) and the inner side wall of the housing (1); The shell (1) is provided with a sound insulation groove (12) and an air outlet (11) that penetrate inside and outside, the air outlet (11) is located between the two ends of the sound insulation groove (12), the sound insulation cotton (2) is located in the sound insulation groove (12), and the shell (1) is provided with a sound insulation cover (4) for sealing the sound insulation groove (12); The sound insulation cover (4) comprises an intermediate cover (41) and two end covers (42), each of the end covers (42) is detachably connected to the housing (1), the intermediate cover (41) is provided with a pulling unit (5) for pulling the sound insulation cotton (2) out of one of the end covers (42), the intermediate cover (41) is provided with a mounting unit (6) for pulling the sound insulation cotton (2) into the sound insulation groove (12), and each of the end covers (42) is connected to the intermediate cover (41) via a sealing assembly (7); The pulling unit (5) comprises a pull strip (51) arranged on the sound insulation cotton (2), the pull strip (51) being arranged on a side of the sound insulation cotton (2) away from the mounting net (3), and the pull strip (51) being arranged along the length direction of the sound insulation cotton (2); The mounting unit (6) includes a reel (62) and a winding rope (63), wherein the reel (62) is rotatably mounted on the housing (1), one end of the winding rope (63) is fixedly mounted on the reel (62), and the other end of the winding rope (63) is detachably connected to the pull rod (51); A support hoop (73) is provided on the inner side wall of the soundproof cover (4), and the middle cover (41) is inserted into the end cover (42); The sealing assembly (7) comprises a sealing strip (71) and a fixing bolt (72), wherein the sealing strip (71) is located between the intermediate cover (41) and the end cover (42), and the fixing bolt (72) passes through the intermediate cover (41), the end cover (42) and the sealing strip (71), and the fixing bolt (72) is inserted into the support hoop (73) and is threadedly connected to the support hoop (73).

2. The noise reduction housing according to claim 1, wherein: The pull bar (51) is provided with a detachable dust box (64), the dust box (64) and the sound insulation cover (4) are slidingly arranged, the dust box (64) is located at one end of the sound insulation cotton (2) close to the reel (62), the inner wall of the intermediate cover (41) is provided with a rack (65), the dust box (64) is provided with a rotating gear (641) meshing with the rack (65), and a cam (643) is coaxially fixed on the rotating gear (641). An impact rod (644) is slidingly provided in the dust removal box (64) for impacting the mounting net (3); a push rod (645) is provided on the impact rod (644) for being pushed by the cam (643); the cam (643) pushes the push rod (645) so that the impact rod (644) moves in a direction away from the mounting net (3); and an extrusion spring (646) is provided in the dust removal box (64) for pushing the impact rod (644) to impact the mounting net (3).

3. The noise reduction housing according to claim 2, wherein: A dust collector (68) is provided on the outside of the housing (1), and a suction end of the dust collector (68) is connected to the dust removal box (64) via a hose (69). A vent hole (67) is provided on the side wall of the dust removal box (64).

4. A silent fan, characterized by: The noise reduction housing comprises the noise reduction housing according to any one of claims 1 to 3, wherein the housing (1) is provided with an air suction port (84), and the housing (1) is provided with an air guide and noise reduction component (86).

5. The silent fan according to claim 4, characterized in that: The air guide and noise reduction component (86) includes an air guide frame (861) arranged at the air suction port (84).

6. The silent fan according to claim 4, characterized in that: The air guide and noise reduction component (86) includes an air guide net (863) arranged at the air suction port (84).

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