CN205349808U - Silent fan - Google Patents
Silent fan Download PDFInfo
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- CN205349808U CN205349808U CN201620155980.7U CN201620155980U CN205349808U CN 205349808 U CN205349808 U CN 205349808U CN 201620155980 U CN201620155980 U CN 201620155980U CN 205349808 U CN205349808 U CN 205349808U
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- fan
- silencer cover
- cover
- air
- silent fan
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Abstract
The utility model provides a silent fan, including the fan main part, be equipped with impeller and air inlet end in the fan main part, silent fan still includes the circuitous portion of an annular that amortization cover and the open end that is covered by the roof outer fringe of amortization cover extend to the amortization, the open end of amortization cover with air inlet end intercommunication, amortization cover including the inner cover, cup joint in the interior noise damping layer who covers and cup joint in the last dustcoat of noise damping layer, all be equipped with a plurality of through -holes on inner cover and the dustcoat, noise damping layer with the circuitous portion of annular encloses the region of closing and is equipped with the intercommunication air inlet end and the outside wind -guiding passageway of amortization cover. This silent fan can follow noise abatement's on the source emergence.
Description
Technical field
This utility model relates to a kind of blower fan, is specifically related to a kind of Silent fan.
Background technology
It is currently used for the blower fan of large-scale gas mould, during work, produced by blower fan, noise is bigger, in order to lower noise produced by blower fan, the way being generally adopted is to increase silencing cotton in the inside of blower fan air compartment, reduce noise produced by blower fan, as the patent No. is: 201520607920.X, but the mode of this reduction noise has been merely creating after noise just noise, it is impossible to the slowed noise of generation when making blower fan work from the source producing noise.
Utility model content
In order to overcome the deficiencies in the prior art, the purpose of this utility model is in that to provide the Silent fan of a kind of generation reducing air inlet noise.
For solving the problems referred to above, the technical scheme that this utility model adopts is as follows:
A kind of Silent fan, including fan main body, impeller and air intake it is provided with in described fan main body, described Silent fan also includes a silencer cover and the annular rebate extended by the roof outer rim of silencer cover to the opening of silencer cover, described silencer cover connects with described air intake, and described silencer cover includes inner cover, the noise reduction layer that is socketed on described inner cover and be socketed on the outer housing on described noise reduction layer；Described inner cover and outer housing are equipped with some through holes；Described noise reduction layer is being communicated with the air-guiding aisle outside described air intake and silencer cover with the described region that encloses of annular rebate.
As preferably, the shape of cross section of described silencer cover is circular or oval.
As preferably, described air-guiding aisle be shaped as annular or spiral type.
As preferably, the air intake direction of described air-guiding aisle is vertical with the axis of described silencer cover.
As preferably, described silencer cover is connected by ring flange with described fan main body.
As preferably, the material of described noise reduction layer is silencing cotton and/or sound-absorbing sand.
As preferably, the medial wall of described annular rebate is fitted with silencing cotton.
As preferably, described silencer cover encloses an annular chamber with described annular rebate.
Compared to existing technology, the beneficial effects of the utility model are in that:
1) Silent fan that this utility model provides, air-flow is entered inside silencer cover by air-guiding aisle after entering from annular rebate, and the direction of air-flow there occurs change, thus the speed allowing airflow into fan main body slows down, from source, decrease the generation of noise；
2) Silent fan that this utility model provides, this annular rebate reduces the generation source of the noise of the extraneous air-flow entering air intake on the one hand, has intercepted the internal noise produced of fan main body on the other hand and has transmitted to extraneous route of transmission via air-guiding aisle；This Silent fan is made to have good muting function；
3) Silent fan that this utility model provides, major part air-flow enters inside silencer cover from air-guiding aisle, because this wind-guiding has certain distance by the impeller in described fan main body, impeller high speed rotating is produced the suction to air-flow and will be died down, thus the speed that air-flow enters air intake will reduce, and then from source, decrease the generation of noise；
4) although there being small part air-flow to enter back into by entering inside silencer cover after inner cover from outer housing via noise reduction layer, but these air-flows are via after the obstruct of noise reduction layer, buffering and sound deadening, air velocity is also significantly lower, and the speed of air-flow can lower significantly on the whole.
Below in conjunction with the drawings and specific embodiments, this utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment 1；
Fig. 2 is the Fig. 1 half section schematic diagram along A-A ' line；
Fig. 3 is the Longitudinal cross section schematic of the annexation of silencer cover in embodiment 1, annular rebate and ring flange；
In Fig. 1-3, each accompanying drawing labelling: 1, fan main body；11, air intake；2, impeller；3, silencer cover；31, outer housing；32, inner cover；33, noise reduction layer；34, through hole；4, annular rebate；41, annular chamber；5, air-guiding aisle；6, ring flange.
Detailed description of the invention
In this utility model, the temporald eixis word such as the "front", "rear" that adopts, " side ", " top " is construed as the temporald eixis to accompanying drawing.
Embodiment 1
A kind of Silent fan, as depicted in figs. 1 and 2, including fan main body 1, impeller 2 and air intake 11 it is provided with in described fan main body, described Silent fan also includes a silencer cover 3 connected with described air intake and the annular rebate 4 extended by the roof outer rim of described silencer cover to the opening of silencer cover, and described silencer cover includes inner cover 31, the noise reduction layer 33 that is socketed on described inner cover and be socketed on the outer housing 32 on described noise reduction layer；Described inner cover and outer housing are equipped with some through holes 34；Described noise reduction layer is being communicated with the air-guiding aisle 5 outside described air intake and silencer cover with the described region that encloses of annular rebate.
In the present embodiment 1, air-flow flows into from the rear of annular rebate, via air-guiding aisle enter silencer cover internal laggard enter fan main body air intake.There occurs change because of air-flow in the process, thus the speed allowing airflow into air inlet slows down, from source, decrease the generation of noise；This Silent fan is in use, major part air-flow enters inside silencer cover from air-guiding aisle, small part air-flow enters back into by entering inside silencer cover after inner cover from outer housing via noise reduction layer, thus the speed reduced in the air intake of air-flow entrance fan main body, and then from source, decrease the generation of noise；This annular rebate reduces the generation source of the noise of the air-flow of external world's entrance air intake on the one hand, and another aspect has intercepted the fan main body internal noise the produced route of transmission via the air-guiding aisle transmission extremely external world；Pod apertures effectively prevent the negative pressure between inner cover and outer housing；This Silent fan is made to have good muting function.
In the present embodiment 1, specifically, the shape of cross section of described silencer cover is circular or oval.
In the present embodiment 1, specifically, described air-guiding aisle is positioned at the region that described annular rebate and silencer cover enclose, and it is shaped as around described silencer cover sidewall ringwise or spiral type, so that air-flow stably enters inside silencer cover from all directions equilibrium, thus reduce noise.
In the present embodiment 1, the position of described through hole, it is preferable that be positioned at the sidewall of described inner cover and/or outer housing, namely the roof of described inner cover and/or outer housing is in sealing shape.
In the present embodiment 1, the air intake direction of described air-guiding aisle is vertical with the axis of described silencer cover.
In the present embodiment 1, as shown in figures 1 and 3, described silencer cover is connected by ring flange 6 with described fan main body.
In the present embodiment 1, specifically, the inwall that a kind of form of implementation of described noise reduction layer is the silencing cotton of sizing, the shape of this silencing cotton and the outer wall of inner cover and outer housing matches.Specifically, the another kind of form of implementation of this noise reduction layer is by the sound-absorbing sand of the indefinite form being filled between described inner cover and outer housing, and described air-guiding aisle is enclosed formed by inner cover, outer housing and a pair barrier flaps between the two described in being connected in.The sound-absorbing sand of indefinite form can the vibration of buffer gas flow.Another form of implementation of described noise reduction layer is then by the mixing of above two form of implementation, and namely described noise reduction layer is mixed by silencing cotton and sound-absorbing sand.
In the present embodiment 1, it is preferable that the medial wall of described annular rebate is fitted with silencing cotton, to weaken the intensity from air-guiding aisle noise out.
In the present embodiment 1, it is preferable that as it is shown on figure 3, described silencer cover encloses an annular chamber 41 with described annular rebate.Air-flow flows into air-guiding aisle through this annular chamber.
Above-mentioned embodiment is only preferred implementation of the present utility model; can not with this scope limiting this utility model protection, the change of any unsubstantiality that those skilled in the art does on basis of the present utility model and replacement belong to this utility model scope required for protection.
Claims (8)
1. a Silent fan, including fan main body, impeller and air intake it is provided with in described fan main body, it is characterized in that, described Silent fan also includes a silencer cover and the annular rebate extended by the roof outer rim of silencer cover to the opening of silencer cover, the opening of described silencer cover connects with described air intake, and described silencer cover includes inner cover, the noise reduction layer that is socketed on described inner cover and be socketed on the outer housing on described noise reduction layer；Described inner cover and outer housing are equipped with some through holes；Described noise reduction layer is being communicated with the air-guiding aisle outside described air intake and silencer cover with the described region that encloses of annular rebate.
2. Silent fan as claimed in claim 1, it is characterised in that the shape of cross section of described silencer cover is circular or oval.
3. Silent fan as claimed in claim 1, it is characterised in that described air-guiding aisle be shaped as annular or spiral type.
4. Silent fan as claimed in claim 1, it is characterised in that the air intake direction of described air-guiding aisle is vertical with the axis of described silencer cover.
5. Silent fan as claimed in claim 1, it is characterised in that described silencer cover is connected by ring flange with described fan main body.
6. Silent fan as claimed in claim 1, it is characterised in that the material of described noise reduction layer is silencing cotton and/or sound-absorbing sand.
7. Silent fan as claimed in claim 1, it is characterised in that the medial wall of described annular rebate is fitted with silencing cotton.
8. Silent fan as claimed in claim 1, it is characterised in that described silencer cover encloses an annular chamber with described annular rebate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620155980.7U CN205349808U (en) | 2016-02-29 | 2016-02-29 | Silent fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620155980.7U CN205349808U (en) | 2016-02-29 | 2016-02-29 | Silent fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205349808U true CN205349808U (en) | 2016-06-29 |
Family
ID=56181545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620155980.7U Active CN205349808U (en) | 2016-02-29 | 2016-02-29 | Silent fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205349808U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604968A (en) * | 2016-02-29 | 2016-05-25 | 李锦标 | Silent fan |
| CN106345025A (en) * | 2016-11-18 | 2017-01-25 | 泰锐菲克（天津）医疗科技有限公司 | Amortization cover and breathing machine |
| CN107461351A (en) * | 2017-09-18 | 2017-12-12 | 无锡市广益中心小学 | A kind of electric fan that can reduce noise |
-
2016
- 2016-02-29 CN CN201620155980.7U patent/CN205349808U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604968A (en) * | 2016-02-29 | 2016-05-25 | 李锦标 | Silent fan |
| CN106345025A (en) * | 2016-11-18 | 2017-01-25 | 泰锐菲克（天津）医疗科技有限公司 | Amortization cover and breathing machine |
| CN107461351A (en) * | 2017-09-18 | 2017-12-12 | 无锡市广益中心小学 | A kind of electric fan that can reduce noise |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |