Low-noise cabinet type centrifugal fan box

Abstract

The utility model relates to a low-noise cabinet type centrifugal fan box which comprises a machine box main body, a hub is fixedly connected in one end of the machine box main body, an air extractor for extracting air into the machine box main body is installed in the hub, an impeller is rotatably connected in an inner cavity of the other end of the machine box main body, and the impeller is installed in the machine box main body. The side wall of the case main body is of a double-layer structure, the side wall of the case main body located on the inner layer is provided with the silencing holes, the metal reed is installed between the two layers of the side walls of the case main body, and when air flows to impact the inner wall of the case main body to generate noise, sound waves can penetrate through the silencing holes to act on the metal reed to enable the metal reed to vibrate, and sound wave energy is consumed. And the limiting cavity defined by the longitudinal division bars and the transverse division bars on the outer side wall of the case body is filled with the sound insulation cotton of a porous structure, the sound insulation cotton can be matched with the sound insulation cover to further isolate and absorb the noise, and the problems that when an existing centrifugal fan case works, large noise exists, and the centrifugal fan case is inconvenient to use by a user are solved as much as possible.

Description

Technical Field

[0001] This utility model belongs to the field of centrifugal fan technology, specifically relating to a low-noise cabinet-type centrifugal fan box. Background Technology

[0002] Centrifugal fans are machines that rely on input mechanical energy to increase gas pressure and discharge gas. They are a type of driven fluid machinery and are widely used in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings for ventilation, dust removal, and cooling.

[0003] During the operation of a centrifugal fan, air continuously enters the casing and moves along the inside of the casing, causing impacts and friction with the inner wall of the casing. This results in significant noise from the centrifugal fan, making it inconvenient to use. Utility Model Content

[0004] The purpose of this utility model is to provide a low-noise cabinet-type centrifugal fan box with a simple structure and reasonable design in order to solve the above problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A low-noise cabinet-type centrifugal fan enclosure includes a main body. A hub is fixedly connected to one end of the main body, and an air extraction device for drawing air into the main body is installed in the hub. An impeller is rotatably connected to the inner cavity of the other end of the main body. A drive structure for driving the impeller to rotate is also installed on the main body. The left and right side walls of the main body are both double-layered. Multiple sound-absorbing holes are opened on the inner side wall of the main body, and the sound-absorbing holes communicate with the inner cavity of the main body. A fixed... The chassis is fixedly connected with multiple matrix-distributed metal springs, each corresponding to one of the multiple sound-absorbing holes. Multiple longitudinal and transverse partitions are fixedly connected to the outer wall of the outer chassis body. Adjacent longitudinal and transverse partitions form a limiting cavity, which is filled with sound-absorbing cotton. Soundproof covers are fitted and fixed to the outside of both sides of the chassis body. An exhaust pipe is provided on the soundproof cover on one side, and the end of the exhaust pipe away from the soundproof cover is connected to the inner cavity of the chassis body.

[0007] As a further optimization of this utility model, the air extraction device includes a bracket fixedly installed inside the hub, a first motor fixedly installed on the bracket, and a fan blade installed at the output end of the first motor.

[0008] As a further optimization of this utility model, an air inlet is provided on the side of the main body of the chassis near the fan blade, and a dust filter is provided inside the air inlet, with the periphery of the dust filter being fixedly connected to the inner wall of the air inlet.

[0009] As a further optimization of this utility model, a drive shaft is fixedly connected to the end of the impeller away from the hub. The drive shaft passes through the side wall of the main body of the chassis and is rotatably connected to the main body of the chassis. A bearing is installed at the connection between the drive shaft and the side wall of the main body of the chassis.

[0010] As a further optimization of this utility model, the drive structure includes a second motor installed on the top wall of the chassis body. The output end of the second motor and the end of the transmission shaft located outside the chassis body are both fixedly connected to pulleys. The same belt ring is sleeved on the two pulleys, and the two pulleys are connected by transmission through the belt ring.

[0011] As a further optimization of this utility model, the exhaust pipe has a rectangular tubular structure, and a connection hole is provided at one end of the exhaust pipe located outside the soundproof cover.

[0012] The beneficial effects of this utility model are as follows: the side wall of the main body of the chassis has a double-layer structure. The inner side wall of the main body of the chassis has a sound-absorbing hole. A metal spring is installed between the two side walls of the main body of the chassis. When the airflow hits the inner wall of the main body of the chassis and generates noise, the sound wave can pass through the sound-absorbing hole and act on the metal spring, causing the metal spring to vibrate and consume the sound wave energy, thus achieving preliminary noise reduction. The limiting cavity formed by the longitudinal and transverse partitions on the outer side wall of the main body of the chassis is filled with sound-absorbing cotton with a porous structure. The sound-absorbing cotton can work with the soundproof cover to further isolate and absorb noise, thus avoiding the problem that existing centrifugal fan boxes have large noise when working, which is inconvenient for users. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the installation structure of the chassis body and the longitudinal and transverse partitions of this utility model;

[0016] Figure 4 This is a schematic diagram of the installation structure of the wheel hub and metal spring of this utility model;

[0017] Figure 5 This is a schematic diagram of the installation structure of the hub, the first motor, and the bracket of this utility model;

[0018] Figure 6 This is a schematic diagram of the installation structure of the fan blade of this utility model.

[0019] In the diagram: 1. Main body of the chassis; 2. Hub; 3. Bracket; 4. First motor; 5. Fan blade; 6. Air inlet; 7. Dust filter; 8. Impeller; 9. Drive shaft; 10. Pulley; 11. Belt ring; 12. Second motor; 13. Silencing hole; 14. Metal spring; 15. Longitudinal partition; 16. Transverse partition; 17. Sound insulation cotton; 18. Sound insulation cover; 19. Exhaust pipe. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0021] Example

[0022] like Figure 1 - Figure 6 As shown, a low-noise cabinet-type centrifugal fan box includes a main body 1. A hub 2 is fixedly connected to one end of the main body 1. An air extraction device for drawing air into the main body 1 is installed in the hub 2. The air extraction device includes a bracket 3 fixedly installed in the hub 2. A first motor 4 is fixedly installed on the bracket 3. A fan blade 5 is installed at the output end of the first motor 4. When the first motor 4 is started, the fan blade 5 is driven to rotate by the first motor 4 installed on the bracket 3, thereby drawing external airflow into the main body 1.

[0023] An air intake 6 is provided on the side of the main body 1 near the fan blade 5. A dust filter 7 is installed inside the air intake 6. The dust filter 7 is fixedly connected to the inner wall of the air intake 6. The air intake 6 allows air to enter the main body 1 through the air intake 6. The dust filter 7 installed on the air intake 6 can not only filter the air, but also protect the air intake 6 and improve safety.

[0024] An impeller 8 is rotatably connected to the inner cavity of the other end of the main body 1. A drive shaft 9 is fixedly connected to the end of the impeller 8 away from the hub 2. The drive shaft 9 passes through the side wall of the main body 1 and is rotatably connected to the main body 1. A bearing is installed at the connection between the drive shaft 9 and the side wall of the main body 1, so that the impeller 8 is rotatably connected to the end side wall of the main body 1 through the drive shaft 9.

[0025] The main body 1 of the chassis is also equipped with a drive structure for driving the impeller 8 to rotate. The drive structure includes a second motor 12 installed on the top wall of the main body 1 of the chassis. The output end of the second motor 12 and the end of the transmission shaft 9 located outside the main body 1 of the chassis are both fixedly connected to pulleys 10. The same belt ring 11 is fitted on the two pulleys 10. The two pulleys 10 are connected by the belt ring 11. When the second motor 12 is started, the two pulleys 10 and the belt ring 11 can drive the transmission shaft 9 to rotate, thereby driving the impeller 8 to rotate inside the main body 1 of the chassis and changing the airflow direction.

[0026] The left and right side walls of the chassis body 1 are both double-layered. The inner side wall of the chassis body 1 has multiple sound-absorbing holes 13, which are connected to the inner cavity of the chassis body 1. The outer side wall of the chassis body 1 has multiple matrix-distributed metal springs 14, which correspond one-to-one with the multiple sound-absorbing holes 13. When air enters the chassis body 1, it will rub and collide with the inner side wall of the chassis body 1 due to the agitation of the impeller 8. The sound waves generated by the collision can pass through the sound-absorbing holes 13 and act on the metal springs 14, causing the metal springs 14 to vibrate, consuming the sound wave energy and performing preliminary noise reduction.

[0027] Multiple longitudinal partitions 15 and transverse partitions 16 are fixedly connected to the outer wall of the outer chassis body 1. Adjacent longitudinal partitions 15 and adjacent transverse partitions 16 enclose a limiting cavity, which is filled with sound insulation cotton 17. The sound insulation cotton 17 has tiny pores, which can absorb noise for further noise reduction. The longitudinal partitions 15 and transverse partitions 16 are used to enclose the limiting cavity and limit the sound insulation cotton 17. This can minimize the displacement of the sound insulation cotton 17 due to vibration, which would lead to uneven distribution of the sound insulation cotton 17 and affect its sound insulation effect.

[0028] The left and right sides of the chassis body 1 are both fitted with soundproof covers 18. The soundproof covers 18 are used to cover the sides of the chassis body 1. They work with the longitudinal partition strip 15 and the transverse partition strip 16 to limit the sound insulation cotton 17. At the same time, the soundproof covers 18 have a vacuum chamber inside, which can isolate noise transmission as much as possible and achieve the purpose of noise isolation.

[0029] An exhaust pipe 19 is installed on the soundproof cover 18 located on one side. The exhaust pipe 19 has a rectangular tubular structure. The end of the exhaust pipe 19 away from the soundproof cover 18 is connected to the inner cavity of the main body 1 of the chassis. This allows the impeller 8 to rotate and expel the air drawn into the main body 1 of the chassis through the exhaust pipe 19. A connection hole is provided at the end of the exhaust pipe 19 located outside the soundproof cover 18, which facilitates the connection of external pipes to the exhaust pipe 19 through the connection hole.

[0030] It should be noted that, in use, this low-noise cabinet-type centrifugal fan box is used by fixing the external air supply pipe to the exhaust pipe 19 through the connection hole, which can turn on the first motor 4 and the second motor 12. The first motor 4 can drive the fan blade 5 to rotate, drawing the air filtered by the dust filter 7 into the main body 1 of the box. The second motor 12 is driven by the pulley 10 and the belt ring 11 to drive the impeller 8 installed on the drive shaft 9 to rotate and change the airflow direction, so that the airflow is discharged into the external air supply pipe through the exhaust pipe 19 for air supply.

[0031] Since both sides of the chassis body 1 have a double-layer structure, the inner side wall of the chassis body 1 has multiple sound-absorbing holes 13, which are connected to the inner cavity of the chassis body 1. The outer side wall of the chassis body 1 has multiple matrix-distributed metal springs 14, which correspond one-to-one with the multiple sound-absorbing holes 13. The noise generated by the airflow impacting the inner wall of the chassis body 1 can pass through the sound-absorbing holes 13 and act on the metal springs 14, causing the metal springs 14 to vibrate and consume the sound wave energy, thus achieving initial noise reduction. The limiting cavity formed by the longitudinal partitions 15 and the transverse partitions 16 on the outer side wall of the chassis body 1 is filled with porous sound-absorbing cotton 17. The sound-absorbing cotton 17 can work with the soundproof cover 18 to further isolate and reduce noise, thus avoiding the problem of large noise and inconvenience to users when existing centrifugal fan boxes are working.

[0032] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A low-noise cabinet-type centrifugal fan casing, comprising a casing body (1), wherein a hub (2) is fixedly connected to one end of the casing body (1), an air extraction device for drawing air into the casing body (1) is installed in the hub (2), an impeller (8) is rotatably connected to the inner cavity of the other end of the casing body (1), and a drive structure for driving the impeller (8) to rotate is also installed on the casing body (1), characterized in that: The chassis body (1) has a double-layer structure on both the left and right side walls. Multiple silencing holes (13) are provided on the inner side wall of the chassis body (1), and these holes (13) communicate with the inner cavity of the chassis body (1). Multiple matrix-distributed metal springs (14) are fixedly connected to the inner side wall of the outer side wall of the chassis body (1), with each metal spring (14) corresponding to one of the multiple silencing holes (13). Multiple... A longitudinal partition (15) and a transverse partition (16) are formed between two adjacent longitudinal partitions (15) and two adjacent transverse partitions (16), and a limiting cavity is formed between them. The limiting cavity is filled with sound insulation cotton (17). Sound insulation covers (18) are fixedly attached to the left and right sides of the chassis body (1). An exhaust pipe (19) is provided on the sound insulation cover (18) located on one side. The end of the exhaust pipe (19) away from the sound insulation cover (18) is connected to the inner cavity of the chassis body (1).

2. The low-noise cabinet-type centrifugal fan box according to claim 1, characterized in that: The air extraction device includes a bracket (3) fixedly installed inside the hub (2), a first motor (4) fixedly installed on the bracket (3), and a fan blade (5) installed at the output end of the first motor (4).

3. A low-noise cabinet-type centrifugal fan box according to claim 2, characterized in that: An air inlet (6) is provided on the side of the main body (1) near the fan blade (5). A dust filter (7) is provided inside the air inlet (6), and the periphery of the dust filter (7) is fixedly connected to the inner wall of the air inlet (6).

4. A low-noise cabinet-type centrifugal fan box according to claim 3, characterized in that: The impeller (8) is fixedly connected to a drive shaft (9) at one end away from the hub (2). The drive shaft (9) passes through the side wall of the chassis body (1) and is rotatably connected to the chassis body (1). A bearing is installed at the connection between the drive shaft (9) and the side wall of the chassis body (1).

5. A low-noise cabinet-type centrifugal fan box according to claim 4, characterized in that: The drive structure includes a second motor (12) mounted on the top wall of the chassis body (1). The output end of the second motor (12) and the end of the transmission shaft (9) located outside the chassis body (1) are both fixedly connected to pulleys (10). The same belt ring (11) is fitted on the two pulleys (10), and the two pulleys (10) are connected by the belt ring (11).

6. A low-noise cabinet-type centrifugal fan box according to claim 5, characterized in that: The exhaust pipe (19) has a rectangular tubular structure, and a connection hole is provided at one end of the exhaust pipe (19) located outside the soundproof cover (18).

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