CN109973432A - A kind of centrifugal blower volute for range hood - Google Patents
A kind of centrifugal blower volute for range hood Download PDFInfo
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- CN109973432A CN109973432A CN201711461456.8A CN201711461456A CN109973432A CN 109973432 A CN109973432 A CN 109973432A CN 201711461456 A CN201711461456 A CN 201711461456A CN 109973432 A CN109973432 A CN 109973432A
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- spiral case
- straight line
- line
- circular arc
- coordinate
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- 238000005452 bending Methods 0.000 claims description 7
- 239000003351 stiffener Substances 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 abstract description 3
- 230000003068 static effect Effects 0.000 abstract description 3
- 230000000994 depressogenic effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 241000237858 Gastropoda Species 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000779 smoke Substances 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
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of centrifugal blower volutes for range hood, including spiral case front cover, the molded line of the spiral case front cover is connected in sequence by first straight line, the first circular arc, the first curve, second straight line and third 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.Increase the opening width in helical end of a period section by optimizing to spiral case inlet pressure, it is more advantageous to conversion of the hydrodynamic to static pressure under the conditions of Wind Volume, reducing tubulence energy simultaneously, to make the flowing of fluid more orderly, more efficient, thus the noise that generations for reducing vortex reduces Wind Volume, strong wind is depressed；The volume of spiral case is bigger on the basis of meeting matching requirements, matched impeller radius and height also accordingly becomes larger, and the acting ability of blower is significantly enhanced, and collector and impeller clearance reduce, air quantity leakage is reduced, the demand for improving air quantity, wind pressure is met.
Description
Technical field
The present invention relates to a kind of range hood, especially a kind of centrifugal blower volute for range hood.
Background technique
With the variation of people's living environment and the raising of quality of the life, the requirement to range hood is also higher and higher.
The blower that domestic cooking fume remover uses is mostly multi-wing centrifugal fan, carries out air-breathing, exhaust.Centrifugal blower generally by spiral case, motor,
The composition such as impeller.The working principle of centrifugal blower is that the rotation of motor impeller does work to air-flow, and is made by the diffusion of spiral case
With from radial discharge.
A kind of spiral case of centrifugal blower used for range hood as disclosed in the Chinese patent application No. is 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 for another example double-faced ventilated formula range hood disclosed in the Chinese patent application No. is 201220245605.3
Volute structure includes air outlet fixed plate, spiral case foreboard disposed 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 round 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, third straight line, third circular 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 third straight line with
5th straight line is vertical；Spiral case back plate is consistent with spiral case foreboard profile and all the points correspond.
However the design theory of multi-wing centrifugal fan is complete not enough, industrial application is not also skillful enough, so adopting at present
It is often not fully up to expectations in the performances such as wind pressure, air quantity with the range hood of such blower fan system.As market is to oil smoke
The air quantity of machine, wind pressure demand are higher and higher, and the fluid dynamic energy in spiral case also needs to synchronize to become larger, and thus caused by tubulence energy etc.
Increase make to be more prone to produce vortex in spiral case, it is increasing so as to cause noise, it is difficult to satisfaction in actual use user to noise
The expectation of value.
Summary of the invention
The technical problem to be solved by the present invention is in view of the above-mentioned problems of the prior art, providing a kind of improvement stream
Field, the centrifugal blower volute for range hood for improving fan performance, reducing noise.
The technical scheme of the invention to solve the technical problem is: a kind of centrifugal blower snail for range hood
Shell, including spiral case front cover, it is characterised in that: the molded line of the spiral case front cover is by first straight line, the first circular arc, the first curve,
Two straight lines and third straight line 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 is tangent in point of intersection.
Preferably, to increase fan efficiency, noise is reduced, the molded line of the spiral case front cover has coordinate origin, X-coordinate axle
For transverse direction, Y-coordinate axle is longitudinal direction, meets the benchmark of the molded line of each straight line, circular arc and curve the composition spiral case front cover of following conditions
Line:
1) first straight line, starting point coordinate are (- 41.5,239), and terminal point coordinate is (- 75.9,165.4)；
2) the first circular arc, radius of curvature 20.4mm, central coordinate of circle are (- 55.7,162)；
3) the first curve, starting point coordinate are (- 51.5,142.2), and terminal point coordinate is (- 222.9,33), by following table
In 31 null circle slip transition formed:
| Angle | Radius | Angle | Radius | Angle | Radius | Angle | Radius | Angle | Radius |
| -20° | 150.56 | 50° | 160.73 | 120° | 188.01 | 190° | 217.67 | 260° | 222.8 |
| -10° | 148.88 | 60° | 165.01 | 130° | 191.71 | 200° | 221.33 | 270° | 223.74 |
| 0° | 148.77 | 70° | 169.74 | 140° | 195.8 | 210° | 223.36 | 279° | 224.84 |
| 10° | 149.75 | 80° | 174.79 | 150° | 200.16 | 220° | 222.58 | ||
| 20° | 151.46 | 90° | 179.75 | 160° | 204.67 | 230° | 222.09 | ||
| 30° | 153.89 | 100° | 182.09 | 170° | 209.19 | 240° | 221.96 | ||
| 40° | 157 | 110° | 184.78 | 180° | 213.55 | 250° | 222.2 |
4) second straight line, terminal point coordinate are (- 197.7,239.5)；
5) third straight line, for straight line always；
The molded line of the spiral case front cover is 0.8~1.5 times of the reference line.
It is abolished to carry out compression convenient for the vortex at the air outlet to spiral case, achievees the purpose that noise reduction, the first straight line
With second straight line respectively relative to Y-coordinate axle at inclination.
Preferably, the first straight line and second straight line are respectively with respect to the inclined angle of Y-coordinate axle between 5 °~25 °.
To act on the impulsive force in the reduction volute tongue of the air pulse phase shifting in volute tongue, reduces blower operating and makes an uproar
Sound, including volute tongue, shape is at a certain angle between the edge line of the volute tongue and the axis of spiral case.
Preferably, the angle is between 0.2 °~2 °.
Further, be to increase fan efficiency, reduce noise, further include spiral case rear cover, the molded line of the spiral case rear cover by
Second circular arc, the second curve, the 4th straight line and the 5th straight line are sequentially connected and are formed, 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.
Preferably, the molded line of the spiral case rear cover has coordinate origin, and X-coordinate axle is that laterally, Y-coordinate axle is longitudinal direction, full
Each straight line, circular arc and curve that foot states condition constitute the reference line of the molded line of spiral case rear cover:
1) coordinate in the second circular arc, radius of curvature and the center of circle is identical as the first circular arc of spiral case front cover, and starting point coordinate is
(77.3,169.2)；
2) the first curve identical of the second curve and spiral case front cover；
3) the 4th straight line, terminal point coordinate are (204.8,169.2)；
4) the 5th straight line, for straight line always；
The molded line of the spiral case rear cover is 0.8~1.5 times of the reference line.
Lower part for the installation convenient for spiral case, the spiral case rear cover forms bending towards the bending of the direction of spiral case front cover
Portion.
To make volute structure simple, reliable and be integrally formed processing convenient for mold, it is formed with air outlet on the spiral case,
The first stiffener and the second stiffener are provided at the air outlet.
Compared with the prior art, the advantages of the present invention are as follows: increase helical end by optimizing to spiral case inlet pressure
The opening width in section, is more advantageous to conversion of the hydrodynamic to static pressure under the conditions of Wind Volume, while reducing tubulence energy to make to flow
The flowing of body is more orderly, more efficient, so that the generation for reducing vortex reduces the noise of Wind Volume, strong wind pressure；?
The volume for meeting spiral case on the basis of matching requirements is bigger, and matched impeller radius and height also accordingly become larger, blower
Acting ability be significantly enhanced, collector and impeller clearance reduce, and reduce air quantity leakage, meet improve air quantity,
The demand of wind pressure.
Detailed description of the invention
Fig. 1 is the front side schematic diagram of the spiral case of the embodiment of the present invention；
Fig. 2 is the rear side schematic diagram of the spiral case of the embodiment of the present invention；
Fig. 3 is the side view of the spiral case of the embodiment of the present invention；
Fig. 4 is the front cover molded line schematic diagram of the spiral case of the embodiment of the present invention；
Fig. 5 is the rear cover molded line schematic diagram of the spiral case of the embodiment of the present invention.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
Referring to FIG. 1 to FIG. 3, a kind of centrifugal blower volute for range hood, including spiral case front cover 1, spiral case rear cover 2,
The spiral case ring wall 3 being connected between spiral case front cover 1 and spiral case rear cover 2, the highly preferred of spiral case ring wall 3 is 145~160mm.
Volute tongue 7, air outlet 4 and air inlet 5 are formed on spiral case.The flange backward of spiral case front cover 1, the flange forward of spiral case rear cover 2, thus will
Spiral case ring wall 3 wraps up, and can preferably make three be connected by way of spot welding and be integrally formed.Outlet air is provided at air outlet 4
Cover (not shown).
Spiral case front cover 1, spiral case rear cover 2 and spiral case ring wall 3 do mould outward flanging at air outlet 4, and pass through setting the
One stiffener 61, the second stiffener 62 become the flange that spiral case is connect with extraneous pipeline to reinforcing at air outlet 4
Part, this spline structure is simple, reliably and convenient for mold is integrally formed processing, good economy performance.The lower part of spiral case rear cover 2 is towards before spiral case
The direction of lid 1 bends and forms bending part 21, and the angle of bending is preferably 30 °, for easily with range hood
Cabinet connection.By at air outlet 4 stiffener and the bending part 21 of spiral case rear cover 2, can be consolidated in upper and lower both direction
It is fixed, spiral case is fixedly mounted on range hood, the redundancy vibration in structure is avoided.
Referring to fig. 4, the molded line of spiral case front cover 1 is by first straight line AB, the first circular arc BC, the first curve CD, second straight line DE
It is connected in sequence with third straight line EA, adjacent straightway and circular arc line segment or adjacent circular arc line segment and curved section or phase
Adjacent curved section and straightway is tangent in point of intersection, for example, first straight line AB and the first circular arc BC are tangential on B point, the first circular arc
BC and the first curve CD is tangential on C point, and the first curve CD and second straight line DE are tangential on D point.By above-mentioned Profile Design, so that
Spiral case interior flow field is reasonable, reduces vortex, reduces flow losses, reaches higher flow and pressure.
First curve CD is the main molded line of spiral case, is the smoothing spline curve formed by 31 rounding ofves.
Specifically, X-coordinate axle is lateral, and Y-coordinate axle is longitudinal direction, full such as using the center of circle O of air inlet 5 as coordinate origin
Foot states each straight line of condition and the reference line of circular arc composition molded line:
1) first straight line AB and Y-coordinate axle formation angle α, starting point coordinate A (- 41.5,239), terminal point coordinate B (-
75.9,165.4)；
2) the radius of curvature R ab of the first circular arc BC is 20.4mm, and center of circle Oab coordinate is (- 55.7,162)；
3) the first curve CD, starting point coordinate C (- 51.5,142.2), terminal point coordinate D (- 222.9,33), curve is by 31
Null circle slip transition is formed, referring to table 1:
The composition point coordinate and size of 1 first curve CD of table
| Angle | Radius | Angle | Radius | Angle | Radius | Angle | Radius | Angle | Radius |
| -20° | 150.56 | 50° | 160.73 | 120° | 188.01 | 190° | 217.67 | 260° | 222.8 |
| -10° | 148.88 | 60° | 165.01 | 130° | 191.71 | 200° | 221.33 | 270° | 223.74 |
| 0° | 148.77 | 70° | 169.74 | 140° | 195.8 | 210° | 223.36 | 279° | 224.84 |
| 10° | 149.75 | 80° | 174.79 | 150° | 200.16 | 220° | 222.58 | ||
| 20° | 151.46 | 90° | 179.75 | 160° | 204.67 | 230° | 222.09 | ||
| 30° | 153.89 | 100° | 182.09 | 170° | 209.19 | 240° | 221.96 | ||
| 40° | 157 | 110° | 184.78 | 180° | 213.55 | 250° | 222.2 |
Molded line is obtained by way of the determination of key point and using multistage spline curve fitting, improves previous multistage circle
Curved line split easily causes runner to be mutated and then flow field is caused to be fluctuated, and increases fan efficiency while reducing noise.
4) second straight line DE, terminal point coordinate E (- 197.7,239.5)；
5) third straight line EA, for straight line always, upper part region connect transition region with outlet housing for spiral case.
The design of size similarization or size adjusting for carrying out part with the reference line is 0.8~1.5 times, all specially for this
Within the protection scope of benefit.
Wherein, first straight line AB and second straight line DE is respectively relative to Y-coordinate axle and has carried out a degree of inclination, and first
Straight line AB and Y-coordinate axle angulation are α, and second straight line DE and Y-coordinate axle angulation are β, it is therefore an objective to air outlet 4
The vortex at place carries out compression and abolishes, and achievees the purpose that noise reduction, tilt angle is preferably between 5 °~25 °.
First circular arc BC constitutes the molded line of the volute tongue 7 of spiral case, and the edge line l of volute tongue 7 is in one on the axial direction of spiral case
(two straight lines are located at for fixed inclination, i.e. the axis L of the edge line l (edge line far from 4 side of air outlet) with spiral case of volute tongue 7
In same plane) between shape it is at a certain angle, it is therefore an objective to make to act on air pulse phase shifting in volute tongue and reduce volute tongue
On impulsive force, reduce blower running noise, angle is preferably between 0.2 °~2 °.
Referring to Fig. 5, the molded line of spiral case rear cover 2 is by the second circular arc B1C1, the second curve C1D1, the 4th straight line D1E1It is straight with the 5th
Line E1B1It is sequentially connected and is formed, 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, for example, the second circular arc B1C1With the second curve C1D1It is tangential on C1Point, the second curve
C1D1With the 4th straight line D1E1It is tangential on D1Point.
Coordinate origin O1For center of circle O with air inlet 5 on the same axis of spiral case, reference axis is specific to sit with spiral case front cover 1
Dimensioning is as follows:
1) the second circular arc B1C1Radius of curvature R b1c1, center of circle Ob1c1Coordinate with spiral case front cover 1 the first circular arc BC, rise
Initial point coordinate B1(77.3,169.2)；
2) the second curve C1D1With the first curve CD of spiral case front cover 1,30 ° of angles are cut convenient for spiral case and fume-exhausting cabinet in lower part
The assembly of body；
3) the 4th straight line D1E1, terminal point coordinate E1(204.8,169.2)；
4) the 5th straight line E1B1, for straight line always, upper area connect transition region with outlet housing for spiral case.
The opening width for increasing helical end of a period section by optimizing to spiral case inlet pressure, is more advantageous to Wind Volume condition
Conversion of the lower hydrodynamic to static pressure, while reducing tubulence energy to make the flowing of fluid more orderly, more efficient, to reduce
The noise that generations of vortex reduces Wind Volume, strong wind is depressed；The volume of spiral case is bigger on the basis of meeting matching requirements,
Maximum molded line radius be 224.84mm, spiral case maximum height 157.4mm, matched impeller radius and highly also mutually strain
Greatly, the acting ability of blower is significantly enhanced, and collector and impeller clearance are reduced to 20.7mm, reduces air quantity leakage,
Meet the demand for improving air quantity, wind pressure.
Claims (10)
1. a kind of centrifugal blower volute for range hood, including spiral case front cover (1), it is characterised in that: the spiral case front cover
(1) molded line is by first straight line (AB), the first circular arc (BC), the first curve (CD), second straight line (DE) and third straight line (EA)
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.
2. the centrifugal blower volute according to claim 1 for range hood, it is characterised in that: the spiral case front cover
(1) molded line has coordinate origin (O), and X-coordinate axle is that laterally, Y-coordinate axle is longitudinal direction, meets each straight line, the circle of following conditions
Arc and curve constitute the reference line of the molded line of spiral case front cover (1):
1) first straight line (AB), starting point coordinate (A) are (- 41.5,239), and terminal point coordinate (B) is (- 75.9,165.4)；
2) the first circular arc (BC), radius of curvature 20.4mm, central coordinate of circle are (- 55.7,162)；
3) the first curve (CD), starting point coordinate (C) are (- 51.5,142.2), and terminal point coordinate (D) is (- 222.9,33), under
31 null circle slip transition in table are stated to be formed:
4) second straight line (DE), terminal point coordinate (E) are (- 197.7,239.5)；
5) third straight line (EA), for straight line always；
The molded line of the spiral case front cover (1) is 0.8~1.5 times of the reference line.
3. the centrifugal blower volute according to claim 2 for range hood, it is characterised in that: the first straight line
(AB) and second straight line (DE) is respectively relative to Y-coordinate axle at inclination.
4. the centrifugal blower volute according to claim 3 for range hood, it is characterised in that: the first straight line
(AB) and second straight line (DE) is respectively with respect to the inclined angle of Y-coordinate axle between 5 °~25 °.
5. the centrifugal blower volute according to claim 1 for range hood, it is characterised in that: it further include volute tongue (7),
Shape is at a certain angle between the edge line (l) of the volute tongue (7) and the axis (L) of spiral case.
6. the centrifugal blower volute according to claim 5 for range hood, it is characterised in that: the angle is at 0.2 °
Between~2 °.
7. being used for the centrifugal blower volute of range hood described according to claim 1~any one of 6, it is characterised in that: also
Including spiral case rear cover (2), the molded line of the spiral case rear cover (2) is by the second circular arc (B1C1), the second curve (C1D1), the 4th straight line
(D1E1) and the 5th straight line (E1B1) be sequentially connected and formed, 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.
8. the centrifugal blower volute according to claim 7 for range hood, it is characterised in that: the spiral case rear cover
(2) molded line has coordinate origin (O1), X-coordinate axle is that laterally, Y-coordinate axle is longitudinal direction, meets each straight line, the circle of following conditions
Arc and curve constitute the reference line of the molded line of spiral case rear cover (2):
1) the second circular arc (B1C1), the coordinate in radius of curvature and the center of circle is identical as the first circular arc (BC) of spiral case front cover (1), starting
Point coordinate (B1) it is (77.3,169.2)；
2) the second curve (C1D1) identical as the first curve (CD) of spiral case front cover (1)；
3) the 4th straight line (D1E1), terminal point coordinate (E1) it is (204.8,169.2)；
4) the 5th straight line (E1B1), for straight line always；
The molded line of the spiral case rear cover (2) is 0.8~1.5 times of the reference line.
9. the centrifugal blower volute according to claim 7 for range hood, it is characterised in that: the spiral case rear cover
(2) lower part forms bending part (21) towards the bending of the direction of spiral case front cover (1).
10. such as the centrifugal blower volute according to any one of claims 1 to 6 for range hood, it is characterised in that: described
It is formed on spiral case air outlet (4), is provided with the first stiffener (61) and the second stiffener (62) at the air outlet (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711461456.8A CN109973432B (en) | 2017-12-28 | 2017-12-28 | Centrifugal fan volute for range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711461456.8A CN109973432B (en) | 2017-12-28 | 2017-12-28 | Centrifugal fan volute for range hood |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109973432A true CN109973432A (en) | 2019-07-05 |
| CN109973432B CN109973432B (en) | 2024-01-16 |
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ID=67074928
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711461456.8A Active CN109973432B (en) | 2017-12-28 | 2017-12-28 | Centrifugal fan volute for range hood |
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| Country | Link |
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| CN (1) | CN109973432B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110516326A (en) * | 2019-08-13 | 2019-11-29 | 浙江万事兴电器有限公司 | A kind of energy noise reduction promotes the kitchen ventilator Volute Design method of air quantity |
| 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 |
| CN111878424A (en) * | 2020-08-25 | 2020-11-03 | 中山市高途五金制品有限公司 | Large-air-volume volute fan |
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| 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 |
| CN111878424A (en) * | 2020-08-25 | 2020-11-03 | 中山市高途五金制品有限公司 | Large-air-volume volute fan |
| CN111878424B (en) * | 2020-08-25 | 2024-05-17 | 中山市高途五金制品有限公司 | Large air volume volute fan |
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| CN109973432B (en) | 2024-01-16 |
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