CN213270481U

CN213270481U - Centrifugal fan with noise reduction function

Info

Publication number: CN213270481U
Application number: CN202022137188.8U
Authority: CN
Inventors: 何光平; 马家能; 邓有规; 刘丽; 李兰凤
Original assignee: Foshan Yuefeng Electric Appliance Co ltd
Current assignee: Foshan Yuefeng Electric Appliance Co ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-05-25
Anticipated expiration: 2030-09-25

Abstract

The utility model discloses a centrifugal fan with function of making an uproar falls in amortization relates to centrifugal fan technical field. The centrifugal fan comprises a centrifugal fan body, an air inlet shell and an air outlet shell, wherein the air inlet shell and the air outlet shell are arranged on the centrifugal fan body; the air-out casing inside wall fixedly connected with amortization pipe, two air inlet fill that the amortization intraductal side wall fixedly connected with set up from top to bottom. The utility model discloses an air-out casing, hush pipe, air-supply line fill, arc pipe, hush hole, mutually supporting between first amortization cotton and the second amortization cotton, the air current gets into in the hush pipe, outwards discharges behind two arc pipes, the setting of hush hole, can effectively gas reduce the noise that the air current produced, simultaneously with the cotton cooperation of first amortization, effectively reduced the noise of this device during operation air-out casing department, and then reducible this device operational environment's noise, ensured staff's physical and mental health.

Description

Centrifugal fan with noise reduction function

Technical Field

The utility model relates to a centrifugal fan technical field especially relates to a centrifugal fan with function of making an uproar is fallen in amortization.

Background

The centrifugal fan accelerates gas by utilizing an impeller rotating at a high speed according to the principle that kinetic energy is converted into potential energy, then decelerates and changes the flow direction, so that the kinetic energy is converted into the potential energy.

The existing centrifugal fan mainly comprises a support, a shell, an air inlet end, an air exhaust end, an impeller, a power device and the like, wherein the air exhaust end of the centrifugal fan is mainly used for connecting a pipeline, in the working process of the centrifugal fan, the noise generated at the air exhaust port is high, and if a human body works in a noise environment for a long time, the physical and mental health of workers is easily damaged.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the centrifugal fan during operation among the prior art, the great problem of noise of its air outlet department, and the centrifugal fan who has the function of making an uproar is fallen in the amortization that provides.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a centrifugal fan with noise reduction and noise reduction functions comprises a centrifugal fan body, and an air inlet shell and an air outlet shell which are arranged on the centrifugal fan body, wherein the inner side wall of the air inlet shell is in threaded connection with a mounting ring, and the inner side wall of the mounting ring is fixedly connected with a metal blocking net; the air-out casing inside wall fixedly connected with amortization pipe, two air-in hoppers that the amortization intraductal side wall fixedly connected with set up from top to bottom, two the relative one side of air-in hopper all is connected with the arc tube through the ring flange, a plurality of bloops have been seted up to the arc tube lateral wall.

Preferably, the outer side wall of the mounting ring is provided with an external thread, and the inner side wall of the air inlet shell is provided with a thread groove matched with the external thread.

Preferably, a plurality of fixed blocks of collar lateral wall fixedly connected with, the mounting groove has been seted up to the fixed block lateral wall, mounting groove inside wall sliding connection has protruding type fixture block, protruding type fixture block is connected through installation spring and the bottom in the mounting groove, the draw-in groove with protruding type fixture block looks adaptation is seted up to the air inlet casing inside wall.

Preferably, the mounting ring and the outer side wall of the air inlet shell are both fixedly connected with an indicating block.

Preferably, the outer side wall of the silencing pipe is fixedly sleeved with first silencing cotton, and the outer side wall of the first silencing cotton is in contact with the inner side wall of the air outlet casing.

Preferably, the inner side wall of the silencing pipe is fixedly connected with a plurality of second silencing cotton, and the second silencing cotton is located between the two flanges and is in contact with the outer side wall of the adjacent flange.

Compared with the prior art, the beneficial effects of the utility model are that:

1. through air-out casing, hush pipe, air inlet hopper, arc pipe, hush hole, mutually supporting between first hush cotton and the second hush cotton, the air current gets into in the hush pipe, outwards discharges behind two arc pipes, the setting of hush hole, can effectively the gas reduce the noise that the air current produced, simultaneously with the cotton cooperation of first hush, effectively reduced the noise of this device during operation air-out casing department, and then reducible this device operational environment's noise, ensured staff's physical and mental health.

2. Through mutually supporting between air inlet casing, collar, metal block, fixed block and the protruding type fixture block, install the metal block in air inlet casing department, can effectively reduce the foreign matter and get into in the air inlet casing, the setting of protruding type fixture block simultaneously for be connected between collar and the air inlet casing is more stable.

Drawings

Fig. 1 is a schematic structural view of a centrifugal fan according to the present invention;

FIG. 2 is a schematic view of the connection structure of the metal barrier net and the air intake housing of the present invention;

FIG. 3 is a side view of the air intake housing of the present invention;

fig. 4 is a side view of the mounting ring and metal barrier of the present invention;

fig. 5 is a schematic view of a connection structure between the fixing block and the convex fixture block of the present invention;

fig. 6 is a schematic view of the internal structure of the silencing tube of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1-6, an embodiment of the utility model provides a centrifugal fan with function of making an uproar falls in amortization includes centrifugal fan body 1 and sets up air inlet casing 2 and air-out casing 3 on centrifugal fan body 1. Wherein, 2 inside wall threaded connection of air inlet casing has

collar

4, and 4 lateral walls of collar are equipped with the external screw thread, and the thread groove with external screw thread looks adaptation is seted up to 2 inside walls of air inlet casing. The inside wall of the mounting ring 4 is fixedly connected with a metal blocking net 5, and the outside walls of the mounting ring 4 and the air inlet shell 2 are both fixedly connected with an indicating block 15. The indication block 15 can be used for marking, so that the installation position is accurate when the installation ring 4 is rotatably installed.

Further, in the preferred embodiment of the present invention, a plurality of fixing blocks 11 are fixedly connected to the outer side wall of the mounting ring 4, and a mounting groove 12 is formed on the outer side wall of the fixing block 11. The inside wall of the mounting groove 12 is slidably connected with a convex block 13, and the convex block 13 is connected with the bottom of the mounting groove 12 through a mounting spring 14. The inside wall of the air inlet shell 2 is provided with a clamping groove matched with the convex clamping block 13. The shape of the convex block 13 can be seen in fig. 5, the convex block 13 can make the connection between the mounting ring 4 and the air inlet housing 2 more stable, and the problem that the threaded connection between the air inlet housing 2 and the mounting ring 4 is loose due to vibration can be reduced.

Further, in the preferred embodiment of the present invention, the inner side wall of the air outlet casing 3 is fixedly connected with a silencing pipe 6, and the inner side wall of the silencing pipe 6 is fixedly connected with two air inlet hoppers 7 which are arranged up and down. The two opposite sides of the air inlet hoppers 7 are connected with an arc-shaped pipe 9 through a flange plate 8, and a plurality of silencing holes 10 are formed in the outer side wall of the arc-shaped pipe 9. By arranging a plurality of small silencing holes 10 to replace the air outlet shell 3 to directly jet air, when air flow passes through the silencing holes 10, partial frequency spectrum of air jet noise can be transferred to high frequency or ultrahigh frequency, audible sound components in the frequency spectrum are obviously reduced, and therefore the influence of the noise on a human body can be reduced.

Further, in the preferred embodiment of the present invention, the outer sidewall of the silencing pipe 6 is fixedly sleeved with a first silencing cotton 16, and the outer sidewall of the first silencing cotton 16 contacts with the inner sidewall of the air outlet casing 3. The 6 inside walls fixedly connected with of amortization pipe are a plurality of second amortization cotton 17, and second amortization cotton 17 is located between two ring flanges 8 and with the contact of adjacent ring flange 8 lateral wall. The first silencing cotton 16 and the second silencing cotton 17 can further reduce the noise generated when the centrifugal fan body 1 works.

The utility model discloses its functional principle is explained to following mode of operation of accessible:

first, the two indicating blocks 15 are aligned, and the mounting ring 4 is rotated to screw the mounting ring 4 into the intake housing 2. At this time, each convex latch 13 contacts with the inner side wall of the air inlet housing 2 and keeps the state of pressing the mounting spring 14. Along with the rotation of collar 4 gets into in the air inlet casing 2, until protruding fixture block 13 card in the corresponding draw-in groove under the effect of installation spring 14, accomplish the installation of metal block net 5, can effectively avoid the foreign matter to get into in the air inlet casing 2 like this.

When the centrifugal fan body 1 works, airflow flows into the silencing pipe 6 at an accelerated speed and enters the corresponding arc-shaped pipe 9 through the air inlet hopper 7 below. Finally is sprayed out through the silencing hole 10 and is sprayed out upwards from the other arc-shaped pipe 9 and the air inlet hopper 7. The sound-deadening hole 10 can effectively reduce the noise and ensure the physical and psychological health of the working personnel.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A centrifugal fan with noise reduction and noise reduction functions comprises a centrifugal fan body (1), and an air inlet shell (2) and an air outlet shell (3) which are arranged on the centrifugal fan body (1), and is characterized in that the inner side wall of the air inlet shell (2) is in threaded connection with a mounting ring (4), and the inner side wall of the mounting ring (4) is fixedly connected with a metal blocking net (5);

air-out casing (3) inside wall fixedly connected with amortization pipe (6), two air inlet fill (7) that the inside wall fixedly connected with of amortization pipe (6) set up from top to bottom, two the relative one side of air inlet fill (7) all is connected with arc pipe (9) through ring flange (8), a plurality of bloops (10) have been seted up to arc pipe (9) lateral wall.

2. The centrifugal fan with noise reduction and noise reduction functions according to claim 1, wherein external threads are formed on the outer side wall of the mounting ring (4), and thread grooves matched with the external threads are formed on the inner side wall of the air inlet casing (2).

3. The centrifugal fan with noise reduction and noise reduction functions according to claim 1, wherein a plurality of fixing blocks (11) are fixedly connected to an outer side wall of the mounting ring (4), a mounting groove (12) is formed in an outer side wall of each fixing block (11), a convex clamping block (13) is slidably connected to an inner side wall of each mounting groove (12), the convex clamping block (13) is connected with the inner bottom of each mounting groove (12) through a mounting spring (14), and a clamping groove matched with the convex clamping block (13) is formed in an inner side wall of the air inlet casing (2).

4. The centrifugal fan with noise reduction and noise reduction functions according to claim 1, wherein the outer side walls of the mounting ring (4) and the air inlet casing (2) are fixedly connected with an indicating block (15).

5. The centrifugal fan with noise reduction and noise reduction functions as recited in claim 1, wherein a first noise reduction cotton (16) is fixedly sleeved on an outer side wall of the noise reduction pipe (6), and an outer side wall of the first noise reduction cotton (16) is in contact with an inner side wall of the air outlet casing (3).

6. The centrifugal fan with noise reduction and noise reduction functions according to claim 1, wherein a plurality of second noise reduction cottons (17) are fixedly connected to the inner side wall of the noise reduction pipe (6), and the second noise reduction cottons (17) are located between the two flanges (8) and are in contact with the outer side wall of the adjacent flange (8).