CN210889487U

CN210889487U - Low-noise roof fan

Info

Publication number: CN210889487U
Application number: CN201921282583.6U
Authority: CN
Inventors: 顾华鑫; 倪浩龙; 范林江; 梁建荣
Original assignee: Zhejiang Rongwen Fans Co ltd
Current assignee: Zhejiang Rongwen Fans Co ltd
Priority date: 2019-08-08
Filing date: 2019-08-08
Publication date: 2020-06-30
Anticipated expiration: 2029-08-08

Abstract

The utility model discloses a low-noise roof fan, which comprises a base, an air duct arranged on the base, an air cap matched with the air duct, fan blades arranged in the air duct, a connecting mechanism used for connecting the air cap and the air duct and a wind direction adjusting mechanism used for controlling the wind direction, wherein the driving piece is covered with a sound insulation barrel; the noise insulation barrel is covered outside the driving piece, so that noise generated when the driving piece works can be isolated from the noise insulation barrel, and the noise generated when the roof fan works is reduced.

Description

Low-noise roof fan

Technical Field

The utility model belongs to the technical field of the fan, especially, relate to a low noise roof fan.

Background

The roof fan is installed on the roof for air exhaust and air change, and is mainly used for ventilation and air exhaust of buildings such as factory buildings, office buildings, hotels, auditoriums, movie theaters and the like. The existing axial-flow type roof ventilator structure is generally a circular air duct and an air cap added above the air duct, a motor is fixed in the circular air duct, an impeller is installed on an output shaft of the motor, the impeller is driven by the motor to realize air exhaust in a building, and the motor generates certain noise in the working process of the ventilator and is not suitable for environments requiring low noise.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome prior art not enough, provide a low noise roof fan.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a low-noise roof fan comprises a base, an air duct arranged on the base, an air cap matched with the air duct, fan blades arranged in the air duct, a connecting mechanism used for connecting the air cap and the air duct and a wind direction adjusting mechanism used for controlling the wind direction, wherein a sound insulation barrel is covered on a driving piece; the noise insulation barrel is covered outside the driving piece, so that noise generated when the driving piece works can be isolated from the noise insulation barrel, and the noise generated when the roof fan works is reduced.

Preferably, the inner wall of the sound insulation cylinder is provided with sound absorption sponge; the sound-absorbing sponge is arranged to improve the sound-insulating effect of the sound-insulating cylinder.

Preferably, a plurality of exhaust holes are formed in the top of the sound insulation cylinder; the exhaust holes are arranged so that air inside the sound insulation barrel can circulate with outside air, and heat dissipation of the driving piece is facilitated.

Preferably, the vent hole is in a conical spiral shape; the exhaust hole is the toper heliciform and can increases sound wave and exhaust hole contact path for the sound wave produces more friction with the exhaust hole, turns into more heat energy with the sound wave, and then makes the noise further reduce, and the toper heliciform can be so that get into the interior sound wave of exhaust hole and can't go out, and the noise abatement is discharged from the exhaust hole.

Preferably, the inner wall of the air duct is provided with a sound absorption plate, and the sound absorption plate is provided with sound absorption holes; reduce the noise generated by the wind flow friction.

Preferably, the connecting mechanism comprises a fixing plate arranged at the upper end of the air duct, a screw rod arranged on the fixing plate and a screw cap arranged on the pull rod; the height of the hood can be changed by turning the nut.

Preferably, the wind direction adjusting mechanism comprises a plurality of rotating shafts uniformly arranged in the wind barrel, wind deflectors respectively arranged on the rotating shafts and a driving assembly for driving the wind deflectors to rotate; the rotating shaft can drive the air deflector to rotate, so that the inclination angle of the air deflector is changed, and the blowing direction of the wind is changed.

Preferably, the driving assembly comprises a driving wheel arranged on the rotating shaft, a driving wheel, an adjusting driving piece driving the driving wheel to rotate, and a connecting belt sleeved on the driving wheel and the driving wheel.

Preferably, both ends of the air deflector are in contact with the inner wall of the air duct, and the widths of the air deflectors are the same; because the width of the air deflector is the same and the two ends of the air deflector are contacted with the inner wall of the air duct uniformly, the air duct can be sealed by rotating the air deflector to the horizontal state.

Preferably, the air deflector is provided with an arc-shaped convex part; the adjacent air guide plates can be tightly attached in a horizontal state, and the normal rotation of the air guide plates is not influenced.

In conclusion, the noise insulation barrel is covered outside the driving piece, so that the noise generated when the driving piece works can be isolated from the noise insulation barrel, and the noise generated when the roof fan works is reduced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Fig. 3 is an enlarged view of fig. 2 at a.

Fig. 4 is a cross-sectional view of the present invention.

Detailed Description

As shown in fig. 1-4, a low-noise roof fan includes a base 1, an air duct 2, a hood 3, fan blades 4, a driving member 5, a sound-proof tube 6, a sound-proof sponge 61, a sound-absorbing plate 62, a connecting mechanism and a wind direction adjusting mechanism, wherein the base 1 is used for fixing the air duct; the air duct 2 is made of glass fiber reinforced plastic and is fixed on the base 1; the driving piece 5 is a conventional motor and is fixed in the air duct through a connecting plate fixed on the inner wall of the air duct; the fan blade 4 is a conventional centrifugal impeller and is fixed on an output shaft of the driving part; the sound insulation barrel 6 is sleeved outside the driving piece and is supported by conventional sound insulation materials, the upper end of the sound insulation barrel is provided with a plurality of exhaust holes 60, and the exhaust holes can enable air inside the sound insulation barrel to be communicated with external air so as to facilitate heat dissipation of the driving piece; the vent holes 60 are in a conical spiral shape, so that the contact path of sound waves and the vent holes can be increased, more friction is generated between the sound waves and the vent holes, the sound waves are converted into more heat energy, the noise is further reduced, the conical spiral shape can prevent the sound waves entering the vent holes from going out, and the noise is reduced and discharged from the vent holes; the sound insulation sponge 61 is fixed on the inner wall of the sound insulation barrel; the sound-absorbing board 62 is fixed on the inner wall of the air duct and is evenly provided with a plurality of sound-absorbing holes.

Specifically, the connecting mechanism comprises a fixing plate 11, a screw rod 12 and a screw cap 13, wherein the fixing plate 11 is fixed at the top end of the air duct and is provided with a round hole; the screw 12 is a conventional metal screw, the upper end of the screw is fixed on the blast cap, and the lower end of the screw passes through a round hole of the fixing plate; the nut 13 is screwed on the screw rod, and the height of the hood can be changed by rotating the nut.

Specifically, the wind direction adjusting mechanism comprises 4 rotating shafts 7, wind deflectors 71, a driving wheel 72, a driving wheel 73, an adjusting driving piece 74 and a connecting belt 75, wherein the rotating shafts 7 are preferably arranged at the lower end of the wind barrel, one end of each rotating shaft is rotatably connected to the inner wall of the wind barrel, and the other end of each rotating shaft extends out of the wind barrel; the number of the air deflectors 71 is the same as that of the rotating shaft, the air deflectors are respectively fixed on the rotating shaft, arc-shaped convex parts are arranged on two sides of each air deflector, and two ends of each air deflector are in contact with the inner wall of the air duct, so that the air duct can be sealed by rotating the air deflectors to a horizontal state, and the wall of the air duct can be sealed when encountering special weather such as a sand storm lamp, so as to prevent sundries from falling down from the air duct; the driving wheel 72 can be selected from gears and is respectively fixed at the end part of the rotating shaft; the adjusting driving element 74 is a motor; the driving wheel 73 is a gear fixed on an output shaft of the adjusting driving piece; the connecting belt 75 is made of a chain, which is sleeved on the driving wheel and the driving wheel, and the driving wheel is driven to rotate by adjusting the driving part, so that the rotating shaft can be driven to rotate, the inclination angle of the air deflector can be changed, and the blowing direction of the air can be changed.

Claims

1. The utility model provides a low noise roof fan, includes base (1), locates dryer (2) on base (1), with dryer (2) complex hood (3), locate flabellum (4) in dryer (2), fix driving piece (5) in dryer (2), be used for connecting the coupling mechanism of hood and dryer and be used for controlling the wind direction adjustment mechanism of wind direction, its characterized in that: the driving piece (5) is covered with a sound insulation barrel (6).

2. A low noise roof fan according to claim 1, wherein: and a sound absorption sponge (61) is arranged on the inner wall of the sound insulation barrel (6).

3. A low noise roof fan according to claim 1, wherein: the top of the sound insulation barrel (6) is provided with a plurality of exhaust holes (60).

4. A low noise roof fan according to claim 3, wherein: the exhaust hole (60) is in a conical spiral shape.

5. A low noise roof fan according to claim 1, wherein: and the inner wall of the air duct (2) is provided with a sound absorption plate (62), and the sound absorption plate (62) is provided with a sound absorption hole.

6. A low noise roof fan according to claim 1, wherein: the connecting mechanism comprises a fixing plate (11) arranged at the upper end of the air duct (2), a screw rod (12) arranged on the fixing plate (11) and a screw cap (13) arranged on the screw rod (12).

7. A low noise roof fan according to claim 1, wherein: the wind direction adjusting mechanism comprises a plurality of rotating shafts (7) uniformly arranged in the wind barrel (2), wind deflectors (71) respectively arranged on the rotating shafts (7) and a driving assembly for driving the wind deflectors to rotate.

8. A low noise roof fan according to claim 7, wherein: the driving assembly comprises a driving wheel (72) arranged on the rotating shaft, a driving wheel (73), an adjusting driving piece (74) driving the driving wheel to rotate, and a connecting belt (75) sleeved on the driving wheel and the driving wheel.

9. A low noise roof fan according to claim 7, wherein: both ends of the air guide plate (71) are in contact with the inner wall of the air duct, and the width of the air guide plate is the same.

10. A low noise roof fan according to claim 7, wherein: the air deflector (71) is provided with an arc-shaped convex part.