CN201116543Y - Centrifugal fan casing - Google Patents
Centrifugal fan casing Download PDFInfo
- Publication number
- CN201116543Y CN201116543Y CNU2007202014979U CN200720201497U CN201116543Y CN 201116543 Y CN201116543 Y CN 201116543Y CN U2007202014979 U CNU2007202014979 U CN U2007202014979U CN 200720201497 U CN200720201497 U CN 200720201497U CN 201116543 Y CN201116543 Y CN 201116543Y
- Authority
- CN
- China
- Prior art keywords
- snail tongue
- centrifugal blower
- base plate
- blower volute
- room
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a spiral case of centrifugal fan for resolving the rotation noise of prior art, wherein a blade wheel (2) is provided in a spiral case (1) which comprises a front board (3), a side board (12), a bottom board (11) and a worm tongue (4), the front board (3) is provided with an air inlet (5), the bottom board (11) is opposite the front board (3), the longitudinal symmetry surface (8) of the worm tongue (4) and the axis line (6) of the blade wheel have a corner (a), the cross line (9) between the longitudinal symmetry surface (8) and the outer surface of the worm tongue (4) is curve lie, the space of the worm tongue near the two ends of the air inlet (5) or the bottom board (11) is smaller than the worm tongue space at middle, and the worm tongue radius near one end (5) of the air inlet is smaller than the radius near one end of the bottom board (11), thereby confirming air volume without increasing cost and reducing efficiency, to reduce noise of centrifugal fan. The utility model is mainly applied in multi-blade centrifugal fan.
Description
Technical field
The utility model relates to a kind of centrifugal blower volute, especially a kind of centrifugal blower volute of the snail tongue that tilts.
Background technique
The effect of centrifugal blower volute is that the gas that will come out from impeller is concentrated, water conservancy diversion, and changes the part kinetic energy diffusion of gas into static pressure.Impeller when rotation, the air-flow that brings by impeller collide with the periodicity between the snail tongue and air-flow periodically by the minimum clearance between blade and the snail tongue, can produce a kind of periodic Rotation Noise.The straight snail tongue of the most employing of traditional centrifugal blower volute, the form that snail tongue radius is constant, structure as the centrifugal blower volute of using on the air-conditioning is: be provided with impeller in the spiral case, spiral case comprises header board, side plate, base plate and snail tongue, header board is provided with intake grill, base plate is relative with header board, the impeller shaft axis is perpendicular to plane, base plate place, vertical symmetry plane of snail tongue and impeller shaft line parallel, described vertical symmetry plane are meant the snail tongue along the plane of dividing equally from intake grill one end to the direction of base plate one end for two parts of symmetry.The snail tongue room of this kind structural type also promptly on perpendicular to the cross section of impeller shaft axis the impeller outer circumference be that minimum clearance between blade tip and the snail tongue does not change along the impeller axial direction.Therefore, because the snail tongue room equates that on whole axial direction the noise stack of same frequency produces the periodic peaks noise, causes the centrifugal blower Rotation Noise of this kind structure higher relatively.Notification number is that CN2359508 open day was that the Chinese utility model patent " centrifugal blower volute " on January 19th, 2000 discloses a kind of centrifugal blower volute that reduces the centrifugal blower Rotation Noise, this patent adopts a kind of snail tongue and/or the spiral case inwall molded lines structure with respect to impeller shaft axis " outward-dipping ", make gap between impeller and the snail tongue along impeller shaft to variation, thereby reduced the Rotation Noise of centrifugal blower.Vertical symmetry plane of this kind inclination snail tongue still with the impeller shaft line parallel.
The model utility content
For the structure that overcomes existing centrifugal blower volute still can produce the deficiency of rotational noise greatly, technical problem to be solved in the utility model provides a kind of centrifugal blower volute that can further reduce rotational noise.
The technological scheme that its technical problem that solves the utility model adopts is: centrifugal blower volute, be provided with impeller in the spiral case, spiral case comprises header board, side plate, base plate and snail tongue, and header board is provided with intake grill, base plate is relative with header board, and the vertical symmetry plane and the impeller shaft axis of snail tongue have angle.
The beneficial effects of the utility model are: because the vertical symmetry plane and the impeller shaft axis of snail tongue have angle, also be the snail tongue room impeller shaft to radially all change, the situation of noise resonance still less appears in the Rotation Noise that will make blade rotate between the diverse location, thus the periodic peaks noise of more effectively having avoided the rotational noise stack to form.Simultaneously, adopt the structural type that becomes snail tongue radius and become the snail tongue room, optimized air-flow distribution in the blower fan, especially having reduced the centrifugal blower outlet refluxes and internal vortex, on the basis that reduces Rotation Noise, reduce the resistance of snail tongue effectively, reached the reduction flow losses, improve the effect of fan efficiency air-flow.
Description of drawings
Fig. 1 is the centrifugal blower volute schematic representation of employing inclination snail tongue of the present utility model.
Fig. 2 is change snail tongue radius of the present utility model and the centrifugal blower volute schematic representation that becomes the snail tongue room.
Be labeled as 1-spiral case, 2-impeller, 3-header board, 4-snail tongue, 5-intake grill, 6-impeller shaft axis, 7-mounting hole, the vertical symmetry plane of 8-, 9-intersection, 10-blade, 11-base plate, 12-side plate among the figure.The a-angle, b-snail tongue room.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
As depicted in figs. 1 and 2, centrifugal blower volute of the present utility model is provided with impeller 2 in the spiral case 1, spiral case 1 comprises header board 3, side plate 12, base plate 11 and snail tongue 4, header board 3 is provided with intake grill 5, and base plate 11 is relative with header board 3, and the vertical symmetry plane 8 and the impeller shaft axis 6 of snail tongue 4 have angle a.Because snail tongue 4 axially and radially all has deflection with respect to impeller shaft axis 6 at impeller, also be between snail tongue 4 and the impeller 2 the gap at impeller 2 axially and radially all change, will make the Rotation Noise between blade 10 and snail tongue 4 diverse locations situation of noise resonance still less occur, thus the periodic peaks noise of more effectively having avoided the rotational noise stack to form.
Consider the influence of intake grill air-flow, vertically the true dip direction of symmetry plane 8 is: near the minimum range of the snail tongue 4 of header board 3 and 12 of the side plates minimum range less than 12 of the snail tongue 4 of close base plate 11 and side plates, to reduce noise.
According to correlation computations, the value of described angle a is comparatively suitable between 5 °～60 °.
In addition, vertical symmetry plane 8 of snail tongue 4 can be further designed to curve with the intersection 9 of snail tongue outer surface, and the snail tongue room at the two ends of close intake grill 5 or close base plate 11 is less than the snail tongue room at middle part.Promptly adopt the structure that becomes the snail tongue room, air-flow distributes in the blower fan to optimize, and especially can reduce the centrifugal blower outlet and reflux and internal vortex, increases the effective wind rate of centrifugal blower.
Consider the influence of intake grill air-flow, the snail tongue room of close intake grill 5 one ends is less than the snail tongue room near base plate 11 1 ends.
Consider described snail tongue room even variation from gradual change with the angle that reduces noise and resistance.
Further be, can adopt the mode that becomes snail tongue radius: snail tongue 4 is designed to have the snail tongue radius of gradual change, and the snail tongue radius of close intake grill 5 one ends is less than the snail tongue radius near base plate 11 1 ends.Snail tongue radius from snail tongue one end to the snail tongue the other end increases gradually or reduces.The mode of above-mentioned change snail tongue radius has further reduced the resistance of snail tongue to air-flow, has reached the reduction flow losses, improves the effect of fan efficiency.
Consider that the resistance even variation is further to reduce the needs of noise, described snail tongue radius even variation.
Embodiment: as shown in Figure 2, centrifugal blower volute of the present utility model, be provided with impeller 2 in the spiral case 1, spiral case 1 comprises header board 3, side plate 12, base plate 11 and snail tongue 4, header board 3 is provided with intake grill 5, base plate 11 is relative with header board 3, base plate 11 is provided with mounting hole 7, between vertical symmetry plane 8 of snail tongue 4 and the impeller shaft axis 6 angle a is arranged, vertical symmetry plane 8 of snail tongue 4 is a curve with the intersection 9 of snail tongue outer surface, and the snail tongue room at the two ends of close intake grill 5 or close base plate 11 is less than the snail tongue room at middle part, and simultaneously, the snail tongue radius of close intake grill 5 one ends is less than the snail tongue radius near base plate 11 1 ends.
This centrifugal blower volute can reduce noise 6%, improves air quantity 7%.
Claims (8)
1. centrifugal blower volute, be provided with impeller (2) in the spiral case (1), spiral case (1) comprises header board (3), side plate (12), base plate (11) and snail tongue (4), header board (3) is provided with intake grill (5), base plate (11) is relative with header board (3), it is characterized in that: vertical symmetry plane (8) of snail tongue (4) has angle (a) with impeller shaft axis (6).
2. centrifugal blower volute as claimed in claim 1 is characterized in that: the true dip direction of described vertical symmetry plane (8) is: the snail tongue (4) of close header board (3) and the minimum range between side plate (12) are less than the snail tongue (4) of close base plate (11) and the minimum range between side plate (12).
3. centrifugal blower volute as claimed in claim 2 is characterized in that: described angle (a) is 5 °～60 °.
4. as claim 1,2 or 3 described centrifugal blower volutes, it is characterized in that: vertically symmetry plane (8) is a curve with the intersection (9) of snail tongue (4) outer surface, and the snail tongue room at the two ends of close intake grill (5) or close base plate (11) is less than the snail tongue room at middle part.
5. centrifugal blower volute as claimed in claim 4 is characterized in that: the snail tongue room of close intake grill (5) one ends is less than the snail tongue room near base plate (11) one ends.
6. centrifugal blower volute as claimed in claim 4 is characterized in that: described snail tongue room even variation.
7. centrifugal blower volute as claimed in claim 4 is characterized in that: the snail tongue radius of close intake grill (5) one ends is less than the snail tongue radius near base plate (11) one ends.
8. centrifugal blower volute as claimed in claim 7 is characterized in that: described snail tongue radius even variation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007202014979U CN201116543Y (en) | 2007-11-28 | 2007-11-28 | Centrifugal fan casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007202014979U CN201116543Y (en) | 2007-11-28 | 2007-11-28 | Centrifugal fan casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201116543Y true CN201116543Y (en) | 2008-09-17 |
Family
ID=39991116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007202014979U Expired - Fee Related CN201116543Y (en) | 2007-11-28 | 2007-11-28 | Centrifugal fan casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201116543Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806571A (en) * | 2015-04-28 | 2015-07-29 | 湖南科技大学 | Efficient centrifugal air blower based on computational fluid dynamic simulation |
| CN105736469A (en) * | 2016-04-05 | 2016-07-06 | 珠海格力电器股份有限公司 | Fan, fan volute and air conditioner |
| CN108661950A (en) * | 2018-06-15 | 2018-10-16 | 广东美的制冷设备有限公司 | Spiral case, wind turbine and refrigeration equipment |
| CN110219828A (en) * | 2019-05-21 | 2019-09-10 | 海信（广东）空调有限公司 | Volute of centrifugal fan, centrifugal fan and electrical apparatus |
| CN111197584A (en) * | 2018-11-20 | 2020-05-26 | 珠海格力电器股份有限公司 | Centrifugal fan, air duct system and air conditioner |
| CN112253543A (en) * | 2020-09-30 | 2021-01-22 | 宁波方太厨具有限公司 | Volute, centrifugal fan applying volute and range hood |
-
2007
- 2007-11-28 CN CNU2007202014979U patent/CN201116543Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806571A (en) * | 2015-04-28 | 2015-07-29 | 湖南科技大学 | Efficient centrifugal air blower based on computational fluid dynamic simulation |
| CN104806571B (en) * | 2015-04-28 | 2017-04-05 | 湖南科技大学 | A kind of efficient centrifugal air blast based on computational fluid dynamics simulation |
| CN105736469A (en) * | 2016-04-05 | 2016-07-06 | 珠海格力电器股份有限公司 | Fan, fan volute and air conditioner |
| CN105736469B (en) * | 2016-04-05 | 2019-10-18 | 珠海格力电器股份有限公司 | fan, fan volute and air conditioner |
| CN108661950A (en) * | 2018-06-15 | 2018-10-16 | 广东美的制冷设备有限公司 | Spiral case, wind turbine and refrigeration equipment |
| CN111197584A (en) * | 2018-11-20 | 2020-05-26 | 珠海格力电器股份有限公司 | Centrifugal fan, air duct system and air conditioner |
| WO2020103602A1 (en) * | 2018-11-20 | 2020-05-28 | 珠海格力电器股份有限公司 | Centrifugal fan, air duct system, and air conditioner |
| CN110219828A (en) * | 2019-05-21 | 2019-09-10 | 海信（广东）空调有限公司 | Volute of centrifugal fan, centrifugal fan and electrical apparatus |
| CN112253543A (en) * | 2020-09-30 | 2021-01-22 | 宁波方太厨具有限公司 | Volute, centrifugal fan applying volute and range hood |
| CN112253543B (en) * | 2020-09-30 | 2022-04-15 | 宁波方太厨具有限公司 | Volute, centrifugal fan applying volute and range hood |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201116543Y (en) | Centrifugal fan casing | |
| CN102562651A (en) | High-efficiency wind-powered centrifugal pump impeller | |
| CN203384065U (en) | Multi-vane fan | |
| CN202194839U (en) | Small double-air-outlet centrifugal fan | |
| CN109595197B (en) | Fan | |
| CN204493271U (en) | A kind of centrifugal blower fan blade wheel | |
| CN102562658A (en) | Centrifugal fan impeller for air cooling refrigerator | |
| CN102312848B (en) | Efficient multi-air outlet energy-saving anti-explosion fan | |
| WO2022143328A1 (en) | Centrifugal fan, household appliance, volute, and cooking utensil | |
| CN201991818U (en) | Through-flow fan bearing seat applied on air conditioner | |
| CN214661053U (en) | Flow guide type axial flow wind wheel and axial flow fan with same | |
| CN204827981U (en) | High -efficient mixed flow fan | |
| CN209959557U (en) | Centrifugal blower impeller and centrifugal blower thereof | |
| CN103629156A (en) | Low-noise and efficient cooling axial flow fan of central air conditioner outdoor unit | |
| CN201133384Y (en) | Cross-flow fan | |
| CN201843798U (en) | Wind tunnel type fan | |
| CN201330737Y (en) | Nine-rectangle shaped blades cooling fan fin | |
| CN203175952U (en) | Backward-style impeller | |
| CN204877985U (en) | Multistage centrifugal blower of energy -efficient three -dimensional flow | |
| CN201934367U (en) | Multi-water leaf rotor | |
| CN216895036U (en) | High-efficient low-noise three-dimensional flow impeller of volute-free centrifugal fan | |
| CN114704488B (en) | Fan blade, centrifugal impeller and centrifugal fan | |
| CN202789701U (en) | Low-noise wall-mounted air-conditioner and cross-flow fan thereof | |
| CN201330731Y (en) | Ten-wedge shaped blades cooling fan fin | |
| CN210290257U (en) | High-air-volume high-static-pressure fan assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SICHUAN CHANGHONG ELECTRIC CO.,LTD. Free format text: FORMER OWNER: SICHUAN CHANGHONG ELECTRIC APPLIANCE CO., LTD. Effective date: 20090710 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090710 Address after: No. 35, Mian Xing East Road, hi tech Zone, Sichuan, Mianyang Province: 621000 Patentee after: Sichuan Changhong Air-Coditioning Co., Ltd. Address before: No. 35, Mian Xing East Road, hi tech Zone, Sichuan, Mianyang Province: 621000 Patentee before: Sichuan Changhong Electrical Appliance Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080917 Termination date: 20151128 |