CN213392772U

CN213392772U - Device for reducing noise of fan shutter

Info

Publication number: CN213392772U
Application number: CN202021969460.2U
Authority: CN
Inventors: 张树林; 郑友斌
Original assignee: CHENGDU HOPE ELECTRONIC INST C
Current assignee: CHENGDU HOPE ELECTRONIC INST C
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2021-06-08
Anticipated expiration: 2030-09-10

Abstract

The utility model relates to a device that is used for fan shutter to fall and makes an uproar comprises fan guard, centrifugal fan, handle, shutter mounting bracket, wind-guiding awl and wind-guiding awl fixed plate. The centrifugal fan is installed on the fan cover as the axle center, and the shutter mounting bracket is fixed in one of them side of fan cover, and the pendulum blade axle is fixed in on the shutter mounting bracket, and the fan during operation pendulum blade rotates on the pendulum blade axle and opens and shuts. The damper is made of special noise reduction materials and is coated at the collision position between the swing blades, so that the purpose of reducing the environmental noise is achieved.

Description

Device for reducing noise of fan shutter

Technical Field

The utility model relates to an amortization structure of making an uproar falls in fan shutter, especially industrial equipment are used for the device that the fan shutter falls and makes an uproar.

Background

The existing power electronic equipment has the problems of heat generation and heat dissipation, and in many occasions, the problem that the heat dissipation of the equipment is solved is that the heat of the equipment is inevitably discharged to the outside of the equipment and returns to the inside of the equipment after external circulation or forced cooling, and the operation is repeated. The most common method is to install a centrifugal fan or an exhaust fan on the top of the equipment or on the outer wall of a room, but because the equipment needs to prevent dust or foreign matters from falling into the equipment and the outer wall surface needs to prevent rainwater from entering the equipment or the room, a louver is arranged at an air outlet of the centrifugal fan or the exhaust fan to prevent dust, foreign matters or rainwater from entering the equipment or the room after the fan stops rotating, but after the fan stops rotating, a louver swinging blade naturally droops to collide with the next swinging blade to generate abnormal sound, or the device consists of two or more fans or exhaust fans, wherein one fan or exhaust fan is damaged, so that the swinging blade corresponding to the fan or the exhaust fan returns to the original position, and the air flow enters the other running fan or exhaust fan from the stopped fan or the exhaust fan to cause the swinging blade to vibrate and generate abnormal sound, thereby increasing the environmental noise.

The fan noise is not only air noise, but also noise generated by opening and closing of the shutter, and the exhaust fan with the shutter also comprises an axial flow fan, so that the exhaust fan is widely applied to any fields of industry and civilian use. The resistive silencer is a silencer which utilizes microporous materials in different structural forms in the airflow pipeline to absorb sound energy and reduce noise.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a convenient operation, economical and practical, the device of making an uproar falls in being used for fan shutter that stable in structure is simple moreover.

In order to solve the technical problem, the utility model relates to a device for making an uproar falls in fan shutter, include: the fan cover is characterized by comprising a pentahedron fan cover, wherein a centrifugal fan is arranged below the top surface of the fan cover, a handle is arranged on the top surface of the fan cover, a louver mounting frame is arranged at an air outlet on the side surface of the fan cover, an air guide cone and an air guide cone fixing plate are fixed on the bottom surface of the fan cover, a blade swinging shaft is arranged on the louver mounting frame, and a swinging blade arranged on the blade swinging shaft can be freely opened and closed under the action of wind power and gravity.

By adopting the structure, the end part of the tubular section of the swinging vane is externally coated with the annular damper, and the lower end part of each swinging vane is lapped on the annular damper after being closed. When the fan runs, the swinging blades rotate along the swinging blade shaft, and the wind flow flows out from the space between the swinging blades 2; when the fan stops rotating, the swinging blades lose the support of wind flow, fall to return to the original position and contact with the next swinging blade to generate noise. Or the device consists of two or more fans, wherein one fan is damaged, so that the swinging blade corresponding to the fan returns to the original position, and the air flow enters the other running fan from the stopped fan, so that the swinging blade vibrates and generates noise. Because the annular damper is arranged outside the rotating shaft of the swinging blade, the noise generated by collision between the swinging blade and the next swinging blade when the swinging blade is reset or wind flows can be eliminated, and the purpose of reducing the environmental noise is further achieved.

As an improvement of the utility model, the end cladding contains micropore damping material's L shape attenuator under the pendulum leaf, absorbs the collision noise between isolation and the pendulum leaf.

As another improvement of the utility model, the lower end of the swing blade is inwards folded into a U-shaped hook of the blind window, and a coated C-shaped damper is arranged to play the same role.

Of course, the present invention is not limited to the installation position of the fan, not limited to the centrifugal fan, the axial flow fan and the number in the fan cover, and the air outlet of the fan cover is not limited to one surface. Compared with the prior art, the utility model have following advantage: convenient use, low cost and good social and economic benefits.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

Figure 1 is the utility model discloses a device sectional view that is used for fan shutter to fall and makes an uproar.

Fig. 2 is a perspective view of the device shown in fig. 1.

Fig. 3 is a partially enlarged view of a portion i of the ring damper of the first embodiment of the present invention shown in fig. 1.

Fig. 4 is an enlarged view of a portion i of an L-shaped damper according to a second embodiment of the present invention shown in fig. 1.

Fig. 5 is an enlarged view of a portion i of a C-shaped damper according to a third embodiment of the present invention shown in fig. 1.

Detailed Description

As shown in fig. 1 and 2, the utility model discloses by fan guard 1, centrifugal fan 3, handle 2, shutter mounting bracket 4, wind-guiding awl 6 and wind-guiding awl fixed plate 7 constitute. The centrifugal fan 3 is installed on the fan cover 1 as an axis, the shutter installation frame 4 is fixed on one side surface of the fan cover 1, and the swing blades 5 are sequentially arranged inside and block outside particle pollutants when being closed.

Fig. 3 shows the first embodiment of the present invention, the swing blade 5 is installed on the swing blade shaft 8, the swing blade 5 is a metal plate one end edge, the inner hole is matched with the swing blade shaft 8 in a rotating way, the cross section edge is covered with the annular damper 10, and the annular damper 10 is formed by a low-density noise reduction material of foam or rubber.

Fig. 4 shows a second embodiment of the present invention, in which the lower end of the swing blade 5 is covered with an L-shaped damper made of an elastic material, and the above-mentioned ring damper 10 is eliminated, so that the collision noise between the isolation and the swing blade 5 is also absorbed.

Fig. 5 shows a third embodiment of the present invention, in which the lower end of the swing blade 5 is provided with a U-shaped hook formed by a mold, and a coated C-shaped damper 12 is disposed.

The above description is only the preferred embodiment of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several variations and modifications can be made, and these should also be considered as belonging to the protection scope of the present invention.

Claims

1. The utility model provides a device that falls makes an uproar for fan shutter, the device includes fan guard (1) of a pentahedron, and fan guard (1) top surface facial make-up centrifugal fan (3), top surface facial make-up handle (2), install shutter mounting bracket (4) at fan guard (1) side air outlet department, and wind guide cone (6) and wind guide cone fixed plate (7) are fixed in fan guard (1) bottom surface, its characterized in that: a swing blade shaft (8) is arranged on the shutter mounting frame (4), and a swing blade (5) mounted on the swing blade shaft (8) can be freely opened and closed under the action of wind power and gravity.

2. A device for noise reduction in a fan shutter according to claim 1, characterized in that: the end part of the tubular section of each swinging vane (5) is externally coated with an annular damper (10), and the lower end part of each swinging vane (5) is lapped on the annular damper (10) after being closed.

3. A device for noise reduction in a fan shutter according to claim 1, characterized in that: the lower end part of the swinging blade (5) is coated with an L-shaped damper (11).

4. A device for noise reduction in a fan shutter according to claim 1, characterized in that: the lower end of the swing blade (5) is inwards folded into a U-shaped hook of the shutter, and a coated C-shaped damper (12) is arranged.