CN215719643U

CN215719643U - High-efficient low noise mixed flow fan

Info

Publication number: CN215719643U
Application number: CN202121581126.4U
Authority: CN
Inventors: 梁帆
Original assignee: Shaoxing Shangyu Yingda Fan Co ltd
Current assignee: Shaoxing Shangyu Yingda Fan Co ltd
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2022-02-01
Anticipated expiration: 2031-07-13

Abstract

The utility model discloses a high-efficiency low-noise mixed flow fan, which comprises an air duct with two open ends, wherein one end of the air duct is an air inlet end, the other end of the air duct is an air outlet end, a motor is arranged in the air duct, a rotating shaft of the motor is connected with an impeller, a hub of the impeller is conical, the air inlet end of the air duct is in an outward-expanding horn mouth shape, the air duct comprises an inner wall and an outer wall, an annular cavity is formed between the inner wall and the outer wall, sound-absorbing materials are filled in the cavity, and meshes are distributed on the inner wall. The utility model provides a high-efficiency low-noise mixed flow fan which can increase air inlet efficiency and reduce noise.

Description

High-efficient low noise mixed flow fan

Technical Field

The utility model relates to a high-efficiency low-noise mixed flow fan, and belongs to the technical field of fans.

Background

The mixed flow fan is a fan between the axial flow fan and the centrifugal fan, the impeller of the mixed flow fan enables air to do centrifugal operation and axial operation, the movement of the air in the shell mixes two movement forms of axial flow and centrifugation, so the mixed flow fan has higher wind pressure coefficient than the axial flow fan and larger flow coefficient than the centrifugal fan, and is used in the occasions with wind pressure and flow rate which are not small, it fills the blank between the axial flow fan and the centrifugal fan, meanwhile, the air-permeable ventilating duct has the characteristics of simple and convenient installation, is widely applied to ventilating places such as civil buildings, industrial and mining enterprises, hotels, restaurants, museums, gymnasiums, basements and the like, is most suitable for pipeline pressurization, air supply and exhaust and the ventilation of high-rise buildings and common buildings, but the velocity of flow of current mixed flow fan is not good, leads to the practicality low, and the noise is great when using in addition, still needs extra connection silencer if will fall the noise.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a high-efficiency low-noise mixed flow fan, which can increase air inlet efficiency and reduce noise at the same time and can solve the defects of the prior art.

The technical scheme of the utility model is as follows: the utility model provides a high-efficient low noise mixed flow fan, includes the open dryer in both ends, and wherein one end is the air inlet end, and the other end is the air-out end, installs the motor in the dryer, has in the pivot of motor to be connected with the impeller, and the wheel hub of impeller is the toper, the air inlet end of dryer is the horn mouth form that expands outward, and the dryer contains inner wall and outer wall, forms the annular appearance chamber between inner wall and the outer wall, it has sound absorbing material to fill in the appearance chamber, and it has the mesh to distribute on the inner wall.

The air duct further comprises an outer barrel and an inner barrel which are detachably connected, the outer wall is the peripheral wall of the outer barrel, and the inner wall is the peripheral wall of the inner barrel.

And when the inner barrel flanging of the inner barrel is attached to the outer barrel flanging of the outer barrel, the other end of the inner barrel is contacted with the step on the inner side of the peripheral wall of the outer barrel, so that two ends of the annular cavity are sealed.

Further, corresponding screw holes are formed in the outer barrel flanging and the inner barrel flanging, and bolts penetrate through the screw holes and are connected with nuts to fix the outer barrel and the inner barrel.

Further install motor section of thick bamboo in the dryer, the motor is installed in the motor section of thick bamboo, dryer and motor section of thick bamboo in-connection have the drainage tube, the drainage tube with motor section of thick bamboo outside intercommunication.

Further, the sound absorption material is mineral wool.

Through the implementation of the utility model, the motor drives the impeller to rotate so as to suck air from the air inlet end of the air duct and discharge the air from the air outlet end, the air inlet end of the air duct is in an outward-expanding bell mouth shape and plays a role of a current collector, so that the air flow is accelerated to establish a uniform velocity field and a uniform pressure field so as to reduce the flow loss and improve the efficiency, the air duct comprises an inner wall and an outer wall, an annular cavity is formed between the inner wall and the outer wall, sound-absorbing materials are filled in the annular cavity, meshes are distributed on the inner wall, and the noise generated by the motor, the impeller and the air flow in the air duct is absorbed by the sound-absorbing materials filled in the annular cavity through the meshes on the inner wall, so that the effect of reducing the noise is achieved.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a sectional view taken along line B of FIG. 2;

fig. 4 is a schematic connection diagram of an air duct.

Shown in the figure: an air duct 1; a motor 2; an impeller 3; an inner wall 4; an outer wall 5; an annular chamber 6; mineral wool 7; mesh 8; an outer cylinder 9; an inner cylinder 10; an outer cylinder flanging 11; a step 12; an inner cylinder flanging 13; a screw hole 14; a motor barrel 15; a drain tube 16.

Detailed Description

The embodiment of the utility model comprises the following steps: as shown in fig. 1 to 4, a high-efficiency low-noise mixed flow fan comprises a wind barrel 1 with two open ends, wherein one end is a wind inlet end, the other end is a wind outlet end, a motor 2 is installed in the wind barrel, an impeller 3 is connected to a rotating shaft of the motor 2, a hub of the impeller 3 is conical, the pressure of the wind flow is increased to play a role of collecting the flow, the wind inlet end of the wind barrel 2 is in an outward-expanding horn mouth shape and plays a role of a flow collector, so that the airflow is accelerated to establish a uniform velocity field and a uniform pressure field so as to reduce the flow loss and improve the efficiency, the wind barrel 2 comprises an inner wall 4 and an outer wall 5, an annular containing cavity 6 is formed between the inner wall 4 and the outer wall 5, the annular containing cavity 6 is filled with mineral wool 7, the mineral wool 7 is the sound-absorbing material 7, meshes 8 are distributed on the inner wall 4, noise generated by the motor 2, the impeller 3 and the airflow passing through the meshes 8 on the inner wall 4 in the wind barrel 1 is absorbed by the mineral wool 7 filled in the annular containing cavity, the effect of reducing noise is achieved.

The preferential dryer 2 of this embodiment is including dismantling urceolus 9 and the inner tube 10 of connection, and outer wall 5 is the perisporium of urceolus 9, and inner wall 4 is the perisporium of inner tube 10, and dryer 2 is bilayer structure, and it is big to use integrative structure production difficulty, and is with high costs, is unfavorable for mass production, through dismantling urceolus 9 and the installation of inner tube 10 combination of connection, but greatly reduced manufacturing cost.

The preferential outer cylinder 9 of this embodiment is provided with an outer cylinder flange 11 at the air outlet end, a step 12 is arranged at the inner side of the peripheral wall of the outer cylinder 9 close to the air inlet end, an inner cylinder flange 13 is arranged at one end of the inner cylinder 10, the inner cylinder 10 is sleeved in the outer cylinder 9, when the inner cylinder flange 13 of the inner cylinder 10 is attached to the outer cylinder flange 11 of the outer cylinder 9, the other end of the inner cylinder 10 contacts with the step 12 on the inner side of the peripheral wall of the outer cylinder 9, so that the two ends of the annular cavity are sealed 6, mineral wool 7 is conveniently fixed and filled in the cavity seal 6, and the leakage is not easy.

The preferential outer cylinder flange 11 and the inner cylinder flange 13 of the embodiment are provided with corresponding screw holes 14, and bolts penetrate through the screw holes 14 of the outer cylinder flange and the inner cylinder flange to be connected with nuts to fix the outer cylinder 9 and the inner cylinder 10, so that the outer cylinder flange and the inner cylinder flange are convenient to disassemble and assemble.

Install motor section of thick bamboo 15 in the preferential dryer 1 of this embodiment, motor 2 installs in motor section of thick bamboo 15, and dryer 1 and motor section of thick bamboo 15 in-connection have a drainage tube 16, and drainage tube 16 communicates motor section of thick bamboo 15 and dryer 1 outside. The motor 2 is isolated from the conveyed airflow by the motor barrel 15, negative pressure is formed in the motor barrel 15 when the airflow passes through, and external air enters the motor barrel 15 through the drainage cooling pipe 16 to cool the motor 2, so that the motor 2 can normally work in a high-temperature environment.

Claims

1. The utility model provides a high-efficient low noise mixed flow fan, includes the open dryer in both ends, and wherein one end is the air inlet end, and the other end is the air-out end, installs the motor in the dryer, has in the pivot of motor to be connected with the impeller, and the wheel hub of impeller is toper, its characterized in that: the air inlet end of the air duct is in an outward-expanding horn mouth shape, the air duct comprises an inner wall and an outer wall, an annular containing cavity is formed between the inner wall and the outer wall, sound absorbing materials are filled in the annular containing cavity, and meshes are distributed on the inner wall.

2. The efficient low-noise mixed-flow fan according to claim 1, characterized in that: the air duct comprises an outer barrel and an inner barrel which are detachably connected, the outer wall is the peripheral wall of the outer barrel, and the inner wall is the peripheral wall of the inner barrel.

3. The efficient low-noise mixed-flow fan according to claim 2, characterized in that: the outer barrel is provided with an outer barrel flanging at the air outlet end, a step is arranged at the end, close to the air inlet, of the inner side of the peripheral wall of the outer barrel, one end of the inner barrel is provided with an inner barrel flanging, the inner barrel is sleeved in the outer barrel, and when the inner barrel flanging of the inner barrel is attached to the outer barrel flanging of the outer barrel, the other end of the inner barrel is in contact with the step on the inner side of the peripheral wall of the outer barrel, so that two ends of the annular accommodating cavity are sealed.

4. The efficient low-noise mixed-flow fan according to claim 3, characterized in that: corresponding screw holes are formed in the outer barrel flanging and the inner barrel flanging, and a bolt penetrates through the screw holes and is connected with a nut to fix the outer barrel and the inner barrel.

5. The efficient low-noise mixed-flow fan according to claim 1, characterized in that: the wind tube is internally provided with a motor barrel, the motor is arranged in the motor barrel, the wind tube and the motor barrel are internally connected with a drainage tube, and the drainage tube is used for communicating the motor barrel with the outside of the wind tube.

6. The efficient low-noise mixed-flow fan according to claim 1, characterized in that: the sound absorbing material is mineral wool.