CN213039492U - Low-noise centrifugal fan - Google Patents
Low-noise centrifugal fan Download PDFInfo
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- CN213039492U CN213039492U CN202021771294.5U CN202021771294U CN213039492U CN 213039492 U CN213039492 U CN 213039492U CN 202021771294 U CN202021771294 U CN 202021771294U CN 213039492 U CN213039492 U CN 213039492U
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- centrifugal fan
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Abstract
The utility model provides a low-noise centrifugal fan, which comprises a centrifugal fan, a motor, a belt pulley, a transmission belt, an air inlet, an air outlet and a double-layer silencing box; according to the low-noise centrifugal fan, the centrifugal fan is arranged in the inner cavity of the double-layer silencing box, the centrifugal fan and the double-layer silencing box are integrated, the sound insulation effect is good, and the overall structure is compact; in addition, the air inlet and the air outlet are directly connected, the motor is arranged outside the flow passage, the motor is well protected, and the service life of the fan is prolonged; the paint is suitable for corrosion prevention, high temperature, smoke exhaust or explosion prevention occasions; in addition, the exhaust pipe is additionally arranged, so that heat dissipation of the motor is facilitated, the exhaust pipe is arranged above the box body and far away from the motor, and noise reduction can be better performed on the centrifugal fan.
Description
Technical Field
The utility model relates to a cabinet type fan accessory technical field, concretely relates to low noise centrifugal fan.
Background
The cabinet type centrifugal fan is widely applied to smoke exhaust and air exhaust systems of building systems, has the advantages of low noise, small vibration and the like, and is installed on a roof or in a fan machine room. Due to the special design of environmental protection or space saving, the fan requires noise lower than 55 decibels. For a fan with special requirements, a motor needs to be arranged outside an air pipe flow channel, and large noise can be generated due to large air quantity and large power of the motor and exceeds 65 decibels. The traditional method is to make a machine room or to make a sound insulation box on site to isolate the fan, the site manufacture is rough, the sound insulation effect is not good, and the cost of adopting the machine room is too high.
Disclosure of Invention
To the defect that exists among the prior art, the utility model aims to provide a low noise centrifugal fan, its saving installation space when can effectively reduce the noise of this low noise centrifugal fan.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a low noise centrifugal fan, low noise centrifugal fan includes centrifugal fan, motor, belt pulley, driving belt, air intake and air outlet, low noise centrifugal fan still includes double-deck noise elimination case, double-deck noise elimination case includes outer noise elimination box and interior noise elimination box, the cavity box structure that outer noise elimination box was enclosed by outer noise elimination panel, the cavity box structure that interior noise elimination box was enclosed by interior noise elimination panel, wherein centrifugal fan fixed mounting in the interior noise elimination box inner chamber, interior noise elimination box fixed mounting in the outer noise elimination box inner chamber, air intake and air outlet are connected respectively the both sides of outer noise elimination box, air intake and air outlet with centrifugal fan is linked together.
In some embodiments, the low-noise centrifugal fan further comprises an exhaust pipe, and the exhaust pipe is mounted on the outer silencing box body and communicated with the inner cavity of the outer silencing box body.
In some embodiments, the motor is fixedly mounted at the bottom end of the inner cavity of the outer sound attenuation box.
In some embodiments, the exhaust pipe is mounted on the outer sound-deadening tank at an end remote from the motor.
In some embodiments, the internal muffling panel on the internal muffling box comprises a panel, a perforated plate and reinforcing ribs, wherein the panel and the reinforcing ribs are fixedly mounted on opposite sides of the perforated plate.
In some embodiments, the internal muffling panel is integrally manufactured by bending and molding.
The invention has the beneficial effects that: according to the low-noise centrifugal fan, the centrifugal fan is arranged in the inner cavity of the double-layer silencing box, the centrifugal fan and the double-layer silencing box are integrated, the sound insulation effect is good, and the overall structure is compact; in addition, the air inlet and the air outlet are directly connected, the motor is arranged outside the flow passage, the motor is well protected, and the service life of the fan is prolonged; the paint is suitable for corrosion prevention, high temperature, smoke exhaust or explosion prevention occasions; in addition, the exhaust pipe is additionally arranged, so that heat dissipation of the motor is facilitated, the exhaust pipe is arranged above the box body and far away from the motor, and noise reduction can be better performed on the centrifugal fan.
Drawings
Fig. 1 is a schematic view of the main viewing direction of the low-noise centrifugal fan of the present invention.
Fig. 2 is the utility model provides a low noise centrifugal fan looks sideways at direction structure schematic diagram.
Fig. 3 is a schematic view of the double-layer muffling box in the front view direction of the present invention.
Fig. 4 is a side view direction structure schematic diagram of the double-layer muffling box of the present invention.
Fig. 5 is a schematic view of the structure of the main view direction of the centrifugal fan of the present invention.
Fig. 6 is a side view direction structure schematic diagram of the centrifugal fan of the present invention.
In the figure:
100-low-noise centrifugal fan, 1-centrifugal fan, 2-motor, 3-driving belt, 4-air inlet, 5-air outlet, 6-outer silencing box, 7-inner silencing box, 71-panel, 72-perforated plate, 73-reinforcing rib, 8-exhaust pipe and 9-belt pulley.
Detailed Description
The present invention will be described in further detail with reference to the drawings and the following detailed description.
Referring to fig. 1 to 6, the present embodiment provides a low noise centrifugal fan 100, where the low noise centrifugal fan 100 includes a centrifugal fan 1, a motor 2, a belt pulley 9, a transmission belt 3, an air inlet 4, an air outlet 5, and a double-layer muffling box. The double-layer silencing box comprises an outer silencing box body 6 and an inner silencing box body 7, the outer silencing box body 6 is of a cavity box body structure surrounded by an outer silencing panel, the inner silencing box body 7 is of a cavity box body structure surrounded by an inner silencing panel, the centrifugal fan 1 is fixedly installed in the inner cavity of the inner silencing box body 7, the inner silencing box body 7 is fixedly installed in the inner cavity of the outer silencing box body 6, the air inlet 4 and the air outlet 5 are respectively connected to two sides of the outer silencing box body 6, the air inlet 4 and the air outlet 5 are communicated with the centrifugal fan 1, so that the motor 2 is arranged outside an air flow channel, noise can be reduced, and meanwhile, the service life of the motor 2 is prolonged.
In some embodiments, the low noise centrifugal fan 100 further comprises an exhaust pipe 8, and the exhaust pipe 8 is mounted on the outer sound attenuation box 6 and is communicated with the inner cavity of the outer sound attenuation box. The exhaust pipe 8 is arranged, so that heat generated in the inner cavity of the outer silencing box body 6 by the motor 2 can be effectively taken out, and the heat can be dissipated; furthermore, the exhaust pipe 8 is arranged on the side remote from the electric machine 2, which allows a better sound damping.
In some embodiments, the inner muffler panel on the inner muffler tank 7 comprises a panel 71, a perforated plate 72 and reinforcing ribs 73, wherein the panel 71 and the reinforcing ribs 73 are fixedly mounted on opposite sides of the perforated plate 72. In order to improve the integral installation effect and the sound insulation effect, the internal silencing panel is integrally manufactured by bending and forming.
In conclusion, the low-noise centrifugal fan is arranged in the inner cavity of the double-layer silencing box, and the centrifugal fan and the double-layer silencing box are integrated, so that the sound insulation effect is good, and the overall structure is compact; in addition, the air inlet and the air outlet 5 are directly connected, the motor 2 is arranged outside the flow channel, the motor 2 is well protected, and the service life of the fan is prolonged; the paint is suitable for corrosion prevention, high temperature, smoke exhaust or explosion prevention occasions; additionally, the exhaust pipe 8 is additionally arranged, so that the motor 2 can conveniently dissipate heat, the exhaust pipe 8 is arranged above the box body and far away from the motor 2, and noise reduction can be better performed on the centrifugal fan.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalent technologies, the present invention is also intended to include such modifications and variations.
Claims (6)
1. The utility model provides a low noise centrifugal fan, low noise centrifugal fan includes centrifugal fan, motor, belt pulley, driving belt, air intake and air outlet, its characterized in that, low noise centrifugal fan still includes double-deck noise elimination case, double-deck noise elimination case includes outer noise elimination box and interior noise elimination box, the cavity box structure that outer noise elimination box was enclosed by outer noise elimination panel, the cavity box structure that interior noise elimination box was enclosed by interior noise elimination panel, wherein centrifugal fan fixed mounting in interior noise elimination box inner chamber, interior noise elimination box fixed mounting in outer noise elimination box inner chamber, air intake and air outlet are connected respectively the both sides of outer noise elimination box, air intake and air outlet with centrifugal fan is linked together.
2. The low-noise centrifugal fan according to claim 1, further comprising an exhaust pipe mounted on the outer sound-deadening tank and communicating with an inner cavity thereof.
3. The low noise centrifugal fan of claim 2 wherein said motor is fixedly mounted at the bottom end of the inner cavity of said outer muffling enclosure.
4. A centrifugal fan with reduced noise as defined in claim 3, wherein said exhaust pipe is mounted to said outer sound-deadening tank at an end remote from said motor.
5. The low noise centrifugal fan of claim 1 wherein the inner muffling panel of the inner muffling tank comprises a face plate, a perforated plate, and reinforcing ribs, wherein the face plate and the reinforcing ribs are fixedly attached to opposite sides of the perforated plate.
6. The low-noise centrifugal fan according to claim 5, wherein the inner noise-damping panel is integrally formed by bending.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021771294.5U CN213039492U (en) | 2020-08-21 | 2020-08-21 | Low-noise centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021771294.5U CN213039492U (en) | 2020-08-21 | 2020-08-21 | Low-noise centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213039492U true CN213039492U (en) | 2021-04-23 |
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ID=75532280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021771294.5U Active CN213039492U (en) | 2020-08-21 | 2020-08-21 | Low-noise centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213039492U (en) |
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2020
- 2020-08-21 CN CN202021771294.5U patent/CN213039492U/en active Active
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