CN206845542U - 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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- CN206845542U CN206845542U CN201720504247.6U CN201720504247U CN206845542U CN 206845542 U CN206845542 U CN 206845542U CN 201720504247 U CN201720504247 U CN 201720504247U CN 206845542 U CN206845542 U CN 206845542U
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- spiral case
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Abstract
The utility model 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, the first circular arc, the second circular arc, three-arc, the 4th circular arc, the 5th circular arc, the 3rd straight line and the 4th straight line, and adjacent straightway and circular arc line segment or adjacent circular arc line segment and circular arc line segment or adjacent circular arc line segment 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, blast) of blower fan system, reduce noise；The structure of spiral case is improved simultaneously, is made its simple in construction and is stablized, is easy to be attached with outside again.
Description
Technical field
It the utility model is related 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, requirement to range hood also more and more higher.
The blower fan that domestic cooking fume remover uses is mostly multi-wing centrifugal fan, carries out air-breathing, exhaust.Centrifugal blower typically by spiral case, motor,
Impeller etc. forms.The operation principle of centrifugal blower is that motor driven wheel rotation is done work to air-flow, and is made by the diffusion of spiral case
Discharged with from radial direction.
Centrifugal blower volute is designed using approximate log helix or approximate Archimedes's spin line, and spiral case is gradual
Extension, the design theory of multi-wing centrifugal fan is complete not enough, thus the blower fan system that current range hood uses, blast,
Air quantity is all often smaller, and noise is also bigger, it is difficult to meets that people require.
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, smoothly transitted and be 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 be arrangeding 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 contacts 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 corresponds a little.
Above-mentioned Volute Design mode, the inhomogeneities that impeller axially flows in each runner is inevitably resulted in, together
When due to the anterior intake of multi-wing centrifugal fan impeller much smaller than in the middle part of impeller, rear portion, so as to cause spiral case it is anterior and
There is whirlpool in current collector, the two factors cause the Turbulent Kinetic in the lower left corner of spiral case maximum behind, flowing confusion the most, impeller
Whirlpool is maximum in the blade passage in the lower left corner, and this becomes one of noise source of multi-wing centrifugal fan.
Utility model content
Technical problem to be solved in the utility model is in view of the above-mentioned problems of the prior art, providing a kind of improve
Flow field, the centrifugal blower volute for range hood for improving fan performance, reducing noise.
Technical scheme is used by the utility model solves above-mentioned technical problem：A kind of centrifugation wind for range hood
Machine spiral case, it is characterised in that：The molded line of the spiral case is by first straight line, second straight line, the first circular arc, the second circular arc, the 3rd circle
Arc, the 4th circular arc, the 5th circular arc, the 3rd straight line and the 4th straight line are connected in sequence, adjacent straightway and circular arc line segment or
Adjacent circular arc line segment and circular arc line segment or adjacent circular arc line segment and straightway are tangent in point of intersection.
Preferably, the molded line of the spiral case has the origin of coordinates, meets that each straight line and circular arc of following conditions form molded line
Datum line：
1) terminal point coordinate (- 32.9,175.4) of first straight line；
2) terminal point coordinate (- 49.6,135) of second straight line；
3) the first circular arc is the snail tongue of spiral case, and arc radius 5.9, radius of curvature origin is (- 44.4,132.4)；
4) the second circular arc starting point coordinate (- 42.2,127), arc radius 143.8, radius of curvature origin
(10.4,-6.9)；
5) three-arc starting point coordinate (134.4,66), arc radius 167.1, radius of curvature origin (-
15.1,-8.4)；
6) the 4th circular arc starting point coordinate (144.4, -58.5), arc radius 188.7, radius of curvature origin (- 35,
0)；
7) the 5th circular arc starting point coordinate (- 174.1, -127.5), arc radius 162.1, radius of curvature origin (-
54.6,-18)；
8) the 4th straight line, starting point coordinate (- 215.2,3.7), terminal point coordinate (- 192,175.4)；
The molded line of the spiral case is 0.8~1.5 times of the datum line.
In order to stablize the structure of spiral case, the spiral case includes spiral case protecgulum, spiral case bonnet, is connected to spiral case protecgulum and spiral case
Spiral case ring wall between bonnet, the spiral case protecgulum backward flange, the spiral case bonnet 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 bonnet 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 bonnet away from spiral case protecgulum are welded with spiral case support, and the spiral case support is symmetrical
Ground is arranged on spiral case bonnet close to edge.
Compared with prior art, the utility model has the advantage of：, can by the design optimized to the molded line of spiral case
To improve the flow field in spiral case, the performance (air quantity, blast) of blower fan system is improved, reduces noise；The structure of spiral case is improved simultaneously,
Make its simple in construction and stablize, be easy to be attached with outside again.
Brief description of the drawings
Fig. 1 is the front side schematic diagram of spiral case embodiment of the present utility model；
Fig. 2 is the rear side schematic diagram of spiral case embodiment of the present utility model；
Fig. 3 is the molded line schematic diagram of spiral case embodiment of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying 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 bonnet 2,
The spiral case ring wall 3 being connected between spiral case protecgulum 1 and spiral case bonnet 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 bonnet 2, thus spiral case ring wall 3 is wrapped up, can preferably pass through the mode of welding
Three is connected.
Spiral case protecgulum 1, spiral case bonnet 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, turns into the flange that spiral case is connected with extraneous pipeline, this spline structure
Simple and cost is cheap.Side of the spiral case bonnet 2 away from spiral case protecgulum 1 is welded with spiral case support 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 bonnet 2 are consistent with the molded line of spiral case ring wall 3) by first straight line AB,
Second straight line BC, the first circular arc C D, the second circular arc DE, three-arc EF, the 4th circular arc FG, the 5th circular arc GH, the 3rd straight line HI
It is connected in sequence with the 4th straight line IJ.Adjacent straightway and circular arc line segment or adjacent circular arc line segment and circular arc line segment or
Adjacent circular arc line segment and straightway are tangent in point of intersection, such as, second straight line BC and the first circular arc C D are tangent in C points, and first
Circular arc C D and the second circular arc DE are tangent in D points, and the second circular arc DE and three-arc EF is tangent in E points, three-arc EF and the 4th
Circular arc FG is tangent in F points, and the 4th circular arc FG and the 5th circular arc GH are tangent in G points, and the 5th circular arc GH and the 3rd straight line HI are in H point phases
Cut.By above-mentioned Profile Design, the flow field in spiral case can be improved, improve the performance (air quantity, blast) of blower fan system, reduction is made an uproar
Sound.
Specifically, such as using the center of circle O of air inlet 5 as the origin of coordinates, 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) first straight line AB (vertical) parallel with Y-coordinate axle, terminal B point coordinates (- 32.9,175.4), first straight line AB length
Degree is determined according to installing space；
2) second straight line BC, terminal C point coordinates (- 49.6,135)；
3) the first circular arc C D is the snail tongue of spiral case, and its main function is to prevent a part of gas in spiral case internal circulation flow,
Improve fan pressure and efficiency, arc radius 5.9, radius of curvature origin c point coordinates (- 44.4,132.4)；
4) the second circular arc DE starting point coordinates D (- 42.2,127), arc radius 143.8, radius of curvature origin d coordinates
(10.4,-6.9)；
5) three-arc EF starting point coordinates E (134.4,66), arc radius 167.1, radius of curvature origin e coordinates (-
15.1,-8.4)；
6) the 4th circular arc FG starting point coordinates F (144.4, -58.5), arc radius 188.7, radius of curvature origin f coordinates
(-35,0)；
7) the 5th circular arc GH starting point coordinates G (- 174.1, -127.5), arc radius 162.1, radius of curvature origin g are sat
Mark (- 54.6, -18)；
8) the 4th straight line HI, H point coordinates (- 215.2,3.7), I point coordinates (- 192,175.4).
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 (5)
- 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), the first circular arc (CD), the second circular arc (DE), three-arc (EF), the 4th circular arc (FG), the 5th circular arc (GH), the 3rd straight line (HI) and the 4th straight line (IJ) are connected in sequence, adjacent straightway and circular arc line segment or adjacent circle Arc and circular arc line segment or adjacent circular arc line segment 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 the origin of coordinates (O), meet that each straight line and circular arc of following conditions form the datum line of molded line：1) terminal (B) coordinate (- 32.9,175.4) of first straight line (AB)；2) terminal (C) coordinate (- 49.6,135) of second straight line (BC)；3) the first circular arc (CD) be spiral case snail tongue, arc radius 5.9, radius of curvature origin (c) coordinate for (- 44.4, 132.4)；4) the second circular arc (DE) starting point (D) coordinate (- 42.2,127), arc radius 143.8, radius of curvature origin (d) are sat Mark (10.4, -6.9)；5) three-arc (EF) starting point (E) coordinate (134.4,66), arc radius 167.1, radius of curvature origin (e) coordinate (-15.1,-8.4)；6) the 4th circular arc (FG) starting point (F) coordinate (144.4, -58.5), arc radius 188.7, radius of curvature origin (f) are sat Mark (- 35,0)；7) the 5th circular arc (GH) starting point (G) coordinate (- 174.1, -127.5), arc radius 162.1, radius of curvature origin (g) Coordinate (- 54.6, -18)；8) the 4th straight line (HI), starting point (H) coordinate (- 215.2,3.7), terminal (I) coordinate (- 192,175.4)；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 1 or 2, it is characterised in that：The spiral case includes Spiral case protecgulum (1), spiral case bonnet (2), the spiral case ring wall (3) being connected between spiral case protecgulum (1) and spiral case bonnet (2), it is described Spiral case protecgulum (1) backward flange, the spiral case bonnet (2) forward flange and by spiral case ring wall (3) wrap up.
- 4. it is used for the centrifugal blower volute of range hood as claimed in claim 3, it is characterised in that：The spiral case is formed with going out Air port (4), the spiral case protecgulum (1), spiral case bonnet (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.
- 5. it is used for the centrifugal blower volute of range hood as claimed in claim 3, it is characterised in that：The spiral case bonnet (2) Side away from spiral case protecgulum (1) is welded with spiral case support (7), and the spiral case support (7) is symmetrically disposed in spiral case bonnet (2) Close to edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720504247.6U CN206845542U (en) | 2017-05-08 | 2017-05-08 | A kind of centrifugal blower volute for range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720504247.6U CN206845542U (en) | 2017-05-08 | 2017-05-08 | A kind of centrifugal blower volute for range hood |
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| Publication Number | Publication Date |
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| CN206845542U true CN206845542U (en) | 2018-01-05 |
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| CN201720504247.6U Active CN206845542U (en) | 2017-05-08 | 2017-05-08 | A kind of centrifugal blower volute for range hood |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107965472A (en) * | 2017-05-08 | 2018-04-27 | 宁波方太厨具有限公司 | A kind of centrifugal blower volute for range hood |
| TWI696789B (en) * | 2019-04-01 | 2020-06-21 | 日商三菱電機股份有限公司 | Centrifugal fan, air supply device, air conditioning device and refrigeration cycle device |
| CN112833032A (en) * | 2020-11-02 | 2021-05-25 | 宁波方太厨具有限公司 | Parallel double-fan system and range hood applying same |
-
2017
- 2017-05-08 CN CN201720504247.6U patent/CN206845542U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107965472A (en) * | 2017-05-08 | 2018-04-27 | 宁波方太厨具有限公司 | A kind of centrifugal blower volute for range hood |
| CN107965472B (en) * | 2017-05-08 | 2024-04-16 | 宁波方太厨具有限公司 | Centrifugal fan volute for range hood |
| TWI696789B (en) * | 2019-04-01 | 2020-06-21 | 日商三菱電機股份有限公司 | Centrifugal fan, air supply device, air conditioning device and refrigeration cycle device |
| CN112833032A (en) * | 2020-11-02 | 2021-05-25 | 宁波方太厨具有限公司 | Parallel double-fan system and range hood applying same |
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