CN107965470A - A kind of centrifugal blower volute for range hood - Google Patents
A kind of centrifugal blower volute for range hood Download PDFInfo
- Publication number
- CN107965470A CN107965470A CN201710317931.8A CN201710317931A CN107965470A CN 107965470 A CN107965470 A CN 107965470A CN 201710317931 A CN201710317931 A CN 201710317931A CN 107965470 A CN107965470 A CN 107965470A
- Authority
- CN
- China
- Prior art keywords
- spiral case
- straight line
- line
- circular arc
- range hood
- 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.)
- Granted
Links
- 238000010586 diagram Methods 0.000 description 3
- 241000237858 Gastropoda Species 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010411 cooking Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
- F04D29/4233—Fan casings with volutes extending mainly in axial or radially inward direction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
Abstract
The invention discloses a kind of centrifugal blower volute for range hood, it is characterised in that：The molded line of the spiral case is connected in sequence by first straight line, second straight line, circular arc, curve, the 3rd straight line and the 4th straight line, and adjacent straightway and circular arc line segment or adjacent circular arc line segment and curved section or adjacent curved section and straightway are tangent in point of intersection.By the design optimized to the molded line of spiral case, the flow field in spiral case can be improved, improve the performance (air quantity, wind pressure) of blower fan system, reduce noise；The structure of spiral case is improved at the same time, is made its simple in structure and is stablized, and easy to be attached with outside.
Description
Technical field
The present invention relates to a kind of range hood, especially a kind of centrifugal blower volute for range hood.
Background technology
With the raising of the change of people's living environment, and quality of the life, the requirement to range hood is also higher and higher.
The wind turbine that domestic cooking fume remover uses is mostly multi-wing centrifugal fan, carries out air-breathing, exhaust.Centrifugal blower generally by spiral case, motor,
Impeller etc. forms.The operation principle of centrifugal blower is that motor impeller is rotated to air-flow acting, and the diffusion for passing through spiral case is made
Discharged with from radial direction.
A kind of spiral case of centrifugal blower used for range hood as disclosed in the Chinese patent of Application No. 201110118687.5
Molded line, is smoothly transitted and is formed by connecting by first straight line, the first circular arc line, the second circular arc line, helix and second straight line, helix
For constant speed helix；A kind of and for example double-faced ventilated formula range hood disclosed in the Chinese patent of Application No. 201220245605.3
Volute structure includes air outlet fixed plate, the spiral case foreboard being arranged in parallel and spiral case back plate and for connecting spiral case foreboard and snail
The spiral case side plate of shell back plate, spiral case foreboard and spiral case back plate are provided with circular air inlet, spiral case foreboard edge wheel profile include according to
The secondary first straight line to connect, second straight line, the first circular arc, the second circular arc, the 3rd straight line, three-arc, the 4th circular arc, the 5th circle
Arc, the 4th straight line and the 5th rectilinear(-al)；5th straight line is contacted with air outlet fixed plate, second straight line and the 3rd straight line with
5th straight line is vertical；Spiral case back plate is consistent with spiral case foreboard profile and all the points correspond.
Above-mentioned Volute Design mode, inevitably results in the inhomogeneities that impeller axially flows in each runner, together
When due to multi-wing centrifugal fan impeller front portion intake much smaller than in the middle part of impeller, rear portion so that cause spiral case it is anterior and
For current collector behind there are whirlpool, the two factors cause the Turbulent Kinetic in the lower left corner of spiral case maximum, flowing confusion the most, impeller
Whirlpool is maximum in the blade passage in the lower left corner, this becomes one of noise source of multi-wing centrifugal fan.
The content of the invention
The technical problems to be solved by the invention are flowed in view of the above-mentioned problems of the prior art, providing a kind of improve
Field, the centrifugal blower volute for range hood for improving fan performance, reducing noise.
Technical solution is used by the present invention solves above-mentioned technical problem：A kind of centrifugal blower snail for range hood
Shell, it is characterised in that：The molded line of the spiral case is by first straight line, second straight line, circular arc, curve, the 3rd straight line and the 4th straight line
Be connected in sequence, adjacent straightway and circular arc line segment or adjacent circular arc line segment and curved section or adjacent curved section and
Straightway is tangent in point of intersection.
Preferably, the molded line of the spiral case has coordinate origin, meets that each straight line and circular arc of following conditions form molded line
Datum line：
1) first straight line and the 4th straight line are vertical, and second straight line and the 3rd straight line opposed vertical direction are inclined；
2) circular arc is the volute tongue of spiral case, and radius of curvature 8.2mm, radius of curvature origin is (- 21.9,148.4)；
3) curve is by 30 rounding ofves are formed in following table spline curve：
| Angle | Radius | Angle | Radius | Angle | Radius | Angle | Radius | Angle | Radius |
| -8° | 141.85 | 60° | 149.5 | 130° | 160.96 | 200° | 177.52 | 270° | 204.46 |
| 0° | 141.97 | 70° | 151.07 | 140° | 162.88 | 210° | 181.06 | 280° | 207.89 |
| 10° | 143.45 | 80° | 151.61 | 150° | 165.65 | 220° | 184.89 | 289° | 210.43 |
| 20° | 144.96 | 90° | 152.90 | 160° | 167.79 | 230° | 188.99 | ||
| 30° | 146.52 | 100° | 154.25 | 170° | 170.53 | 240° | 193.27 | ||
| 40° | 147.69 | 110° | 155.72 | 180° | 173.27 | 250° | 197.04 | ||
| 50° | 148.48 | 120° | 157.98 | 190° | 175.32 | 260° | 200.7 |
The molded line of the spiral case is 0.8~1.5 times of the datum line.
Abolished to be preferably compressed to the vortex in exit, play the role of noise reduction, the second straight line and first
Angle between straight line is α, and the value range of α is 160 °~170 °, and the angle between the 3rd straight line and the 4th straight line is
The value range of β, β are 160 °~170 °.
In order to stablize the structure of spiral case, the spiral case includes spiral case protecgulum, spiral case rear cover, is connected to spiral case protecgulum and spiral case
Spiral case ring wall between rear cover, the spiral case protecgulum backward flange, the spiral case rear cover forward flange and spiral case ring wall is wrapped up.
For ease of realizing the connection of spiral case and extraneous pipeline by simple structure, while cost is reduced, the scroll casing shape
Into having air outlet, the spiral case protecgulum, spiral case rear cover and spiral case the ring wall outward flanging at air outlet, and set in the air outlet
Put outlet strengthens angle.
For ease of being fixed in the two directions so that spiral case can be fixedly mounted on range hood, avoided not
Necessary structural vibration, the side of the spiral case rear cover away from spiral case protecgulum are welded with spiral case stent, and the spiral case stent is symmetrical
Ground is arranged on spiral case rear cover close to edge.
Compared with prior art, the advantage of the invention is that：Pass through the design optimized to the molded line of spiral case, Ke Yigai
Flow field in kind spiral case, improves the performance (air quantity, wind pressure) of blower fan system, reduces noise；The structure of spiral case is improved at the same time, makes it
It is simple in structure and stablize, and easy to be attached with outside.
Brief description of the drawings
Fig. 1 is the front side schematic diagram of the spiral case embodiment of the present invention；
Fig. 2 is the rear side schematic diagram of the spiral case embodiment of the present invention；
Fig. 3 is the molded line schematic diagram of the spiral case embodiment of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with attached drawing embodiment.
Referring to Fig. 1 and Fig. 2, a kind of centrifugal blower volute for range hood, including spiral case protecgulum 1, spiral case rear cover 2,
The spiral case ring wall 3 being connected between spiral case protecgulum 1 and spiral case rear cover 2.Formed with air outlet 4 and air inlet 5 on spiral case.Before spiral case
The flange backward of lid 1, the flange forward of spiral case rear cover 2, thus spiral case ring wall 3 is wrapped up, can preferably cause by welding
Three is connected.
Spiral case protecgulum 1, spiral case rear cover 2 and spiral case ring wall 3 outward flanging at air outlet 4, and by setting outlet to strengthen
Angle 6 is strengthened, and outlet strengthens angle 6 is connected between each flange, becomes the flange that spiral case is connected with extraneous pipeline, this spline structure
It is simple and of low cost.Side of the spiral case rear cover 2 away from spiral case protecgulum 1 is welded with spiral case stent 7, after being symmetrically disposed in spiral case
Thus lid 2 can be fixed in the two directions close to edge so that and spiral case can be fixedly mounted on range hood,
Avoid unnecessary structural vibration.
Referring to Fig. 3, spiral case inlet pressure (spiral case protecgulum 1, spiral case rear cover 2 are consistent with 3 molded line of spiral case ring wall) by first straight line AB,
Second straight line BC, circular arc C D, curve DE, the 3rd straight line EF and the 4th straight line FG are connected in sequence.Adjacent straightway and circle
Arc segment or adjacent circular arc line segment and curved section or adjacent curved section and straightway are tangent in point of intersection, such as, second
Straight line BC and circular arc C D is tangent in C points, and circular arc C D and curve DE are tangent in D points, and curve DE and the 3rd straight line EF are tangent in E points.
Pass through above-mentioned Profile Design so that spiral case interior flow field is reasonable, reduce vortex, reduce flow losses, reach higher flow and
Pressure.
Wherein, first straight line AB and the 4th straight line FG be in order to which air-flow is directed to vertical direction, to coordinate extraneous pipeline,
It can be cancelled according to output flow environment, or modification；Circular arc C D forms the volute tongue of spiral case, its main function is to prevent a part of gas
Body is in spiral case internal circulation flow, raising fan pressure and efficiency；Curve DE is the main molded line of spiral case, its effect is will to be set in spiral case
The gas that the impeller put comes out is oriented to spiral case, and part dynamic pressure is converted to static pressure, can be formed more by the design of following sizes
Rational spiral case interior flow field, improves the airflow pressure and efficiency of wind turbine.
Specifically, such as using the center of circle O of air inlet 5 as coordinate origin, X-coordinate axle is horizontal, and Y-coordinate axle is longitudinal direction, full
Foot states the datum line of each straight line and circular arc the composition molded line of condition：
1) curve DE is by 30 rounding ofves are formed in table 1 below spline curve：
The composition point coordinates and size of 1 curve DE of table
2) circular arc C D is the volute tongue of spiral case, and radius of curvature 8.2mm, radius of curvature origin is (- 21.9,148.4)；
3) first straight line AB and the 4th straight line FG is parallel with Y-coordinate axle (vertical) second straight line BC and the 3rd straight line
EF has carried out certain inclination with respect to Y-coordinate direction of principal axis, thus the vortex in exit can be compressed and abolished, play the work of noise reduction
With the angle between second straight line BC and first straight line AB is α, and the value range of α is preferable, is 160 °~170 °, more excellent
Choosing for 161 °；Angle between 3rd straight line EF and the 4th straight line FG is β, and the value range of β is preferable, be 160 °~
170 °, be more highly preferred to for 165 °.
Local size similarization is carried out with the datum line to design, or size adjusting is 0.8~1.5 times, all for this specially
Within the protection domain of profit.
Claims (6)
- A kind of 1. centrifugal blower volute for range hood, it is characterised in that：The molded line of the spiral case by first straight line (AB), Second straight line (BC), circular arc (CD), curve (DE), the 3rd straight line (EF) and the 4th straight line (FG) are connected in sequence, adjacent Straightway and circular arc line segment or adjacent circular arc line segment and curved section or adjacent curved section and straightway are tangent in point of intersection.
- 2. it is used for the centrifugal blower volute of range hood as claimed in claim 1, it is characterised in that：The molded line tool of the spiral case There is coordinate origin (O), meet that each straight line and circular arc of following conditions form the datum line of molded line：1) first straight line (AB) and the 4th straight line (FG) are vertical, second straight line (BC) and the 3rd straight line (EF) opposed vertical side To inclined；2) circular arc (CD) is the volute tongue of spiral case, and radius of curvature 8.2mm, radius of curvature origin is (- 21.9,148.4)；3) curve (DE) is by 30 rounding ofves are formed in following table spline curve：
Angle Radius Angle Radius Angle Radius Angle Radius Angle Radius -8° 141.85 60° 149.5 130° 160.96 200° 177.52 270° 204.46 0° 141.97 70° 151.07 140° 162.88 210° 181.06 280° 207.89 10° 143.45 80° 151.61 150° 165.65 220° 184.89 289° 210.43 20° 144.96 90° 152.90 160° 167.79 230° 188.99 30° 146.52 100° 154.25 170° 170.53 240° 193.27 40° 147.69 110° 155.72 180° 173.27 250° 197.04 50° 148.48 120° 157.98 190° 175.32 260° 200.7 The molded line of the spiral case is 0.8~1.5 times of the datum line. - 3. it is used for the centrifugal blower volute of range hood as claimed in claim 2, it is characterised in that：The second straight line (BC) Angle between first straight line (AB) is α, and the value range of α is 160 °~170 °, the 3rd straight line (EF) and the 4th straight Angle between line (FG) is β, and the value range of β is 160 °~170 °.
- 4. such as the centrifugal blower volute according to any one of claims 1 to 3 for range hood, it is characterised in that：It is described Spiral case includes spiral case protecgulum (1), spiral case rear cover (2), the spiral case ring wall being connected between spiral case protecgulum (1) and spiral case rear cover (2) (3), the spiral case protecgulum (1) backward flange, the spiral case rear cover (2) forward flange and by spiral case ring wall (3) wrap up.
- 5. it is used for the centrifugal blower volute of range hood as claimed in claim 4, it is characterised in that：The spiral case is formed with going out Air port (4), the spiral case protecgulum (1), spiral case rear cover (2) and spiral case ring wall (3) are in air outlet (4) place outward flanging, and in institute State air outlet (4) and outlet strengthens angle (6) is set.
- 6. it is used for the centrifugal blower volute of range hood as claimed in claim 4, it is characterised in that：The spiral case rear cover (2) Side away from spiral case protecgulum (1) is welded with spiral case stent (7), and the spiral case stent (7) is symmetrically disposed in spiral case rear cover (2) Close to edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710317931.8A CN107965470B (en) | 2017-05-08 | Centrifugal fan volute for range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710317931.8A CN107965470B (en) | 2017-05-08 | Centrifugal fan volute for range hood |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107965470A true CN107965470A (en) | 2018-04-27 |
| CN107965470B CN107965470B (en) | 2024-04-12 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661917A (en) * | 2018-07-16 | 2018-10-16 | 上海瑞晨环保科技有限公司 | Energy-efficient self priming centrifugal pump |
| CN110273860A (en) * | 2019-06-27 | 2019-09-24 | 珠海格力电器股份有限公司 | Air channel structure and air processor |
| CN111120406A (en) * | 2019-12-17 | 2020-05-08 | 中国计量大学上虞高等研究院有限公司 | Method for increasing air volume of centrifugal fan |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101092975A (en) * | 2007-07-06 | 2007-12-26 | 宁波方太厨具有限公司 | Spiral case of blower fan in apparatus with inlet air from two sides for sucking oil fume |
| CN201184321Y (en) * | 2008-04-07 | 2009-01-21 | 佛山市南海九洲普惠风机有限公司 | Spiral casing structure of blower fan |
| CN201202691Y (en) * | 2008-04-24 | 2009-03-04 | 宁波方太厨具有限公司 | Draught fan volute of cooking fume exhauster |
| CN204153846U (en) * | 2014-09-28 | 2015-02-11 | 青岛海尔洗碗机有限公司 | A kind of spiral case and lampblack absorber |
| CN104676698A (en) * | 2015-03-26 | 2015-06-03 | 迅达科技集团股份有限公司 | Volute of extractor hood |
| CN206845543U (en) * | 2017-05-08 | 2018-01-05 | 宁波方太厨具有限公司 | A kind of centrifugal blower volute for range hood |
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101092975A (en) * | 2007-07-06 | 2007-12-26 | 宁波方太厨具有限公司 | Spiral case of blower fan in apparatus with inlet air from two sides for sucking oil fume |
| CN201184321Y (en) * | 2008-04-07 | 2009-01-21 | 佛山市南海九洲普惠风机有限公司 | Spiral casing structure of blower fan |
| CN201202691Y (en) * | 2008-04-24 | 2009-03-04 | 宁波方太厨具有限公司 | Draught fan volute of cooking fume exhauster |
| CN204153846U (en) * | 2014-09-28 | 2015-02-11 | 青岛海尔洗碗机有限公司 | A kind of spiral case and lampblack absorber |
| CN104676698A (en) * | 2015-03-26 | 2015-06-03 | 迅达科技集团股份有限公司 | Volute of extractor hood |
| CN206845543U (en) * | 2017-05-08 | 2018-01-05 | 宁波方太厨具有限公司 | A kind of centrifugal blower volute for range hood |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661917A (en) * | 2018-07-16 | 2018-10-16 | 上海瑞晨环保科技有限公司 | Energy-efficient self priming centrifugal pump |
| CN108661917B (en) * | 2018-07-16 | 2024-03-19 | 上海瑞晨环保科技股份有限公司 | High-efficiency energy-saving self-priming centrifugal pump |
| CN110273860A (en) * | 2019-06-27 | 2019-09-24 | 珠海格力电器股份有限公司 | Air channel structure and air processor |
| CN111120406A (en) * | 2019-12-17 | 2020-05-08 | 中国计量大学上虞高等研究院有限公司 | Method for increasing air volume of centrifugal fan |
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