CN205260431U - Low noise centrifugal fan case - Google Patents
Low noise centrifugal fan case Download PDFInfo
- Publication number
- CN205260431U CN205260431U CN201521125259.5U CN201521125259U CN205260431U CN 205260431 U CN205260431 U CN 205260431U CN 201521125259 U CN201521125259 U CN 201521125259U CN 205260431 U CN205260431 U CN 205260431U
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- CN
- China
- Prior art keywords
- blower fan
- low noise
- centrifugal fan
- fan case
- air
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- Filtering Of Dispersed Particles In Gases (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a low noise centrifugal fan case, including box, fan, air intake and air outlet, the box is the cuboid, the air outlet is located the fan top, the fan passes through the support frame to be fixed in the box, be equipped with purifier between fan and the air intake, purifier includes that coarse efficiency filtering screen imitated the filter bag in and, coarse efficiency filtering screen is arranged in the air intake and imitated between the filter bag, the box inboard is equipped with sound absorbing material. The installation of multiple place, form can be satisfied in the design of rectangular size, and the design of support frame and two capacitors simultaneously can effectively reduce the noise that produces in the fan work.
Description
Technical field
The utility model belongs to blower fan technical field, relates in particular to a kind of Low Noise Centrifugal Fan case.
Background technology
Air box can be divided into centrifugal blower case and axial fan case by the blower fan difference of its use. Centrifugal blower case and axleThe difference of flow type fan case is the blower fan difference using. What centrifugal blower case inside was used is centrifugal blower, and centrifugal blower isAir stream axle, to entering after the impeller of blower fan, mainly radially flows, and this class blower fan is made according to the principle of centrifugal action. Axial-flow typeWhat air box inside was used is axial flow blower, and axial flow blower is that air stream axle is to entering after the impeller of blower fan, approx cylindricalOn surface, flow along axis direction. In the air-supply air exhausting device of various ways, centrifugal fan is due to compact conformation, sizeThe characteristic such as little, air pressure is large, air supplying distance is far away, has been widely recognized.
Centrifugal blower case operation principle is air and the rotation of impeller in fan blade, because air has certain matterTo measure and generation centrifugal force. air flows to outlet from entrance along blade, porch forms vacuum, and air is in the effect of atmospheric pressureUnder enter blower fan, discharge from fan outlet continuously obtain energy in impeller after.
For traditional centrifugal blower, at rotating speed and foot wheel yardstick fixing in the situation that, should increase throughput again withTime to reduce noise be impossible. Mostly traditional centrifugal fan case is volute type structure simultaneously, installs and is vulnerable to installation siteRestriction, there is the problems such as inconvenience, constructional difficulties are installed.
In order to solve the problems of the technologies described above, the utility model proposes a kind of Low Noise Centrifugal Fan case, rectangular buildDesign can meet the installation of multiple place, form, the design of bracing frame and two capacitors simultaneously can effectively reduce windThe noise producing in machine work.
Utility model content
In order to solve the problems of the technologies described above, the utility model proposes a kind of Low Noise Centrifugal Fan case, rectangular buildDesign can meet the installation of multiple place, form, the design of bracing frame and two capacitors simultaneously can effectively reduce windThe noise producing in machine work.
The utility model solves the problems of the technologies described above adopted technical scheme: a kind of Low Noise Centrifugal Fan case,Comprise casing, blower fan, air inlet and air outlet, described casing is cuboid, and described air outlet is positioned at blower fan top, described blower fanBe fixed in casing by bracing frame, between described blower fan and air inlet, be provided with purifier, described purifier comprises thick effectScreen pack and middle-efficient filtering bag, described low efficient filter screen is between air inlet and middle-efficient filtering bag, and described box inside is provided withSound-absorbing material.
As preferably, support frame as described above comprises base for supporting and shockproof bar, and described blower fan is positioned on base for supporting, described inShockproof bar is positioned at blower fan top, and perpendicular with air outlet, and described shockproof bar has two at least, described shockproof bar one end and blower fanConnect, the other end is connected with cabinet wall.
As preferably, between described low efficient filter screen and air inlet, be provided with dividing wall, described dividing wall will slightly be imitated filtrationChamber average mark between net and air inlet is slit into two capacitors, is respectively the first chamber and the second chamber, described dividing wallOn have manhole, in manhole, be set with breather pipe, described breather pipe one end is positioned at the first chamber, the other end is positioned atIn the second chamber.
As preferably, described air inlet cross-sectional diameter reduces to box house gradually along air inlet central shaft.
As preferably, the height of described casing, width and length are all between 0.55m-0.60m.
As preferably, described low efficient filter screen adopts glass fibre to make.
As preferably, described sound-absorbing material adopts meltblown polyester fiber to make.
The utility model has the advantage of:
1, blower fan is fixed in casing by bracing frame, and bracing frame comprises base for supporting and shockproof bar, passes through base for supportingWith the mating reaction of shockproof bar, blower fan is securely fixed in casing, greatly reduce the vibrations of blower fan, greatly reduceNoise.
2, the chamber average mark between low efficient filter screen and air inlet is slit into two capacitors by dividing wall, and air is by enteringGas port enters the first chamber, then enters the second chamber by breather pipe, makes sound wave by the sudden change in air flow duct cross sectionIn communication process, cause the change of impedance, thereby produce reflection, the interference of acoustic energy, reach the object of noise elimination.
Brief description of the drawings
In order to be illustrated more clearly in the utility model detailed description of the invention or technical scheme of the prior art, below by rightIn detailed description of the invention or description of the Prior Art, the accompanying drawing of required use is briefly described, and apparently, the following describesIn accompanying drawing be embodiments more of the present utility model, for those of ordinary skill in the art, do not paying creativenessUnder the prerequisite of work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is sectional structure chart of the present utility model.
Wherein: 1, casing 2, blower fan 3, air inlet 4, air outlet
5, base for supporting 6, shockproof bar 7, low efficient filter screen 8, middle-efficient filtering bag
9, dividing wall 10, the first chamber 11, the second chamber 12, breather pipe
13, sound-absorbing material
Detailed description of the invention
Below in conjunction with accompanying drawing, the technical solution of the utility model is clearly and completely described, obviously, describedEmbodiment is the utility model part embodiment, instead of whole embodiment. Based on the embodiment in the utility model, thisField those of ordinary skill, not making the every other embodiment obtaining under creative work prerequisite, all belongs to this practicalityNovel protected scope.
In description of the present utility model, it should be noted that term " " center ", " on ", D score, " left side ", " right side ", " perpendicularDirectly ", orientation or the position relationship of the instruction such as " level ", " interior ", " outward " be based on orientation shown in the drawings or position relationship, be onlyThe utility model and simplified characterization for convenience of description, instead of device or the element of instruction or hint indication must have specificOrientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model. In addition term ",One ", " second ", " the 3rd " be only for describing object, and can not be interpreted as instruction or hint relative importance.
A kind of Low Noise Centrifugal Fan case, comprises casing 1, blower fan 2, air inlet 3 and air outlet 4, and described casing 1 is for longFang Ti, height, width and the length of described casing 1 are all between 0.55m-0.60m, and described air outlet 4 is positioned at blower fan 2 tops,Described blower fan 2 is fixed in casing 1 by bracing frame, and support frame as described above comprises base for supporting 5 and shockproof bar 6,2 of described blower fansOn base for supporting 5, described shockproof bar 6 is positioned at blower fan 2 tops, and perpendicular with air outlet 4, and described shockproof bar 6 has two at leastIndividual, described shockproof bar 6 one end are connected with blower fan 2, and the other end is connected with casing 1 inwall, the supported base of blower fan and shockproof bar jailIn the middle of firmly fixing on, make blower fan reduce at work vibrations, greatly reduce the generation of noise.
Between described blower fan 2 and air inlet 3, be provided with purifier, described purifier comprises low efficient filter screen 7 and middle effectFilter bag 8, described low efficient filter screen 7 is between air inlet 3 and middle-efficient filtering bag 8, and described low efficient filter screen 7 adopts glass fibersDimension is made. The air that is arranged to enter in air box of low efficient filter screen and middle-efficient filtering bag is cleaned processing, to a certain degreeOn improved the cleannes of discharging air.
Between described low efficient filter screen 7 and air inlet 3, be provided with dividing wall 9, described dividing wall 9 is by low efficient filter screen 7 and enterChamber average mark between air port 3 is slit into two capacitors, is respectively the first chamber 10 and the second chamber 11, described dividing wall 9On have manhole, in manhole, be set with breather pipe 12, described breather pipe 12 one end are positioned at the first chamber 10, anotherEnd is positioned at the second chamber 11, and air enters the first chamber by air inlet, then enters the second chamber by breather pipe, by skyThe sudden change of the moving pipeline section of air-flow and make sound wave cause the change of impedance in communication process, thereby the reflection, dry that produces acoustic energyRelate to, reach the object of noise elimination. Described air inlet 3 cross-sectional diameters reduce to casing 1 inside gradually along air inlet central shaft, skyWhen gas passes through air inlet again, because air inlet diameter diminishes gradually, also cause to a certain extent sound wave reflection, reached and disappearedThe object of sound.
Described casing 1 inner side is provided with sound-absorbing material 13, and described sound-absorbing material 13 adopts meltblown polyester fiber to make. Sound absorberThe setting of material also can absorb the noise producing in casing greatly.
Finally it should be noted that: above each embodiment is only in order to the technical solution of the utility model to be described, but not to its limitSystem; Although the utility model is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art shouldUnderstand: its technical scheme that still can record aforementioned each embodiment is modified, or to wherein some or all ofTechnical characterictic is equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from this practicality newlyThe scope of the each embodiment technical scheme of type.
Claims (7)
1. a Low Noise Centrifugal Fan case, comprises casing, blower fan, air inlet and air outlet, it is characterized in that described casingFor cuboid, described air outlet is positioned at blower fan top, and described blower fan is fixed in casing by bracing frame, described blower fan and air intakeBetween mouthful, be provided with purifier, described purifier comprises low efficient filter screen and middle-efficient filtering bag, and described low efficient filter screen is positioned atBetween air inlet and middle-efficient filtering bag, described box inside is provided with sound-absorbing material.
2. a kind of Low Noise Centrifugal Fan case according to claim 1, is characterized in that, support frame as described above comprises supportBase and shockproof bar, described blower fan is positioned on base for supporting, and described shockproof bar is positioned at blower fan top, and perpendicular with air outlet,Described shockproof bar has two at least, and described shockproof bar one end is connected with blower fan, and the other end is connected with cabinet wall.
3. a kind of Low Noise Centrifugal Fan case according to claim 1, is characterized in that, described low efficient filter screen and enteringBetween air port, be provided with dividing wall, the chamber average mark between low efficient filter screen and air inlet is slit into two loculuses by described dividing wallChamber, is respectively the first chamber and the second chamber, on described dividing wall, has manhole, is set with breather pipe in manhole,Described breather pipe one end is positioned at the first chamber, and the other end is positioned at the second chamber.
4. a kind of Low Noise Centrifugal Fan case according to claim 1, is characterized in that, described air inlet cross section is straightFootpath reduces to box house gradually along air inlet central shaft.
5. a kind of Low Noise Centrifugal Fan case according to claim 1, is characterized in that, the height of described casing, wideDegree and length are all between 0.55m-0.60m.
6. a kind of Low Noise Centrifugal Fan case according to claim 1, is characterized in that, described low efficient filter screen adoptsGlass fibre is made.
7. a kind of Low Noise Centrifugal Fan case according to claim 1, is characterized in that, described sound-absorbing material adopts moltenSpray polyester fiber is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521125259.5U CN205260431U (en) | 2015-12-28 | 2015-12-28 | Low noise centrifugal fan case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521125259.5U CN205260431U (en) | 2015-12-28 | 2015-12-28 | Low noise centrifugal fan case |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205260431U true CN205260431U (en) | 2016-05-25 |
Family
ID=56001961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521125259.5U Expired - Fee Related CN205260431U (en) | 2015-12-28 | 2015-12-28 | Low noise centrifugal fan case |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205260431U (en) |
-
2015
- 2015-12-28 CN CN201521125259.5U patent/CN205260431U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160525 Termination date: 20191228 |