CN1140703C - Blower volute structure of top-sucking kitchen ventilator - Google Patents
Blower volute structure of top-sucking kitchen ventilator Download PDFInfo
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- CN1140703C CN1140703C CNB011320567A CN01132056A CN1140703C CN 1140703 C CN1140703 C CN 1140703C CN B011320567 A CNB011320567 A CN B011320567A CN 01132056 A CN01132056 A CN 01132056A CN 1140703 C CN1140703 C CN 1140703C
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Abstract
The present invention relates to a blower volute structure of a top-sucking fume extractor, which comprises an upper shell body, a lower shell body and a shring-shaped middle shell body used for connecting the upper shell body and the lower shell body. The present invention is characterized in that the upper shell body and the lower shell body are asymmetric structures, in a volute tongue position, the curvature radius of the boundary curve of the lower shell body is smaller than that of the boundary curve of the upper shell body, and the upper shell body and the lower shell body are mutually connected through the middle shell body in the volute tongue position by a continuous smooth warped surface; in the volute tongue position, the ratio of the curvature radius of the boundary curve of the lower shell body to the curvature radius of the boundary curve of the upper shell body is 5 to 29.1, which is optimal. Compared with the prior art, the asymmetric design of the upper shell body and the lower shell body of the present invention in the volute tongue position enables airflow to generate a new noise source in the volute tongue position; because different radians are continuously changed in the volute tongue position, the formed noise has a continuous spectrum, and thus, the new noise can effectively counteract partial original noise of the fume extractor; thereby, total noise is reduced, and a large-power motor with large noise can be installed on the fume extractor.
Description
Technical field
The present invention relates to the blower volute structure of a kind of component structural of range hood, particularly a kind of range hood.
Background technique
Now, range hood has become one of requisite kitchen fitting of ordinary family, wherein adopt the kitchen ventilator of centrifugal blower bigger with its relative suction, noise is lower and well received, in any case yet, noise still exists, noise is generally from two aspects, the one, the noise of blower fan itself, the 2nd, the noise that air-flow moves and sends because of turbulization in volute of blower, existing various denoising structure all is based on the design that how to reduce noise source, and in noise reduction technology, a kind of in addition " active noise reduction " principle, promptly, form artificially one identical with noise source amplitude size but new sound source that phase place is opposite offsets former noise, yet through frequency analysis, the noise of range hood is one all has the continuous spectrum of suitable intensity in the scope of 20Khz at 6.3Hz, therefore to offset fully and be difficult to accomplish, but will accomplish that part offsets or possible.
Summary of the invention
Technical problem to be solved by this invention is how to provide a kind of utilization " active noise reduction " principle to come, can effectively reduce the blower volute structure of suction top sucking type kitchen ventilator noise.
The present invention solves the problems of the technologies described above the technological scheme that is adopted: the blower volute structure of top-sucking kitchen ventilator comprises upper shell, lower shell body and is connected the ring-type middle casing of the two, it is characterized in that upper shell and lower shell body are dissymmetrical structure, at snail tongue place, the radius of curvature of described lower shell body boundary curve is 5: 29.1 with the ratio of the radius of curvature of upper shell boundary curve, and the middle casing at this place then is connected both with the warp surface of continuously smooth transition.
At snail tongue place, the radius of curvature of described lower shell body boundary curve was good with the ratio of the radius of curvature of upper shell boundary curve with 5: 29.1; Be the best with following scheme wherein, promptly on developed projection, described lower shell body boundary curve is sentenced by circular arc AB, circular arc BC and circular arc C D rounding off at the snail tongue and is formed by connecting, and wherein the ratio of the radius of circular arc AB, BC, CD is 259.9: 5: 146; And described upper shell boundary curve is sentenced straight line AE, circular arc EF and logarithmic spiral FD rounding off is formed by connecting at the snail tongue, and wherein the radius of circular arc EF is 29.1: 5 with the ratio of the radius of circular arc BC; Especially, described upper shell has a tortuosity along the snail tongue and extends upward a tongue piece at the exhaust outlet place, can further reduce noise, this tongue piece is good with an arc plate, and with radian be 90 °, radius with upper shell the ratio of the radius of curvature of the boundary curve at snail tongue place be 22: 29.1 be the best.
Compared with prior art, the asymmetrical design of lower shell body at snail tongue place that go up of the present invention makes air-flow produce a new noise source at this place, and because the different radians at snail tongue place are continually varyings, therefore formed noise also is a continuous frequency spectrum, these new noises can be offset the original noise of a part of range hood effectively, thereby total noise is descended, and the setting of the overhanging tongue piece of upper shell can be flowed out air-flow more swimmingly from the spiral case outlet, can reduce eddy current further, thereby noise is further reduced at this place.Because the present invention utilizes the principle of " active noise reduction " that total noise is reduced, and therefore just the bigger heavy-duty motor of original noise might be installed on range hood, thereby improve the lampblack absorbing efficient of this machine.
Description of drawings
Description of drawings.
Fig. 1 is the application state schematic representation of the embodiment of the invention.
Fig. 2 is the worm's eye view of the embodiment of the invention.
Fig. 3 is the front view of the embodiment of the invention.
Fig. 4 is the plan view of the embodiment of the invention.
Fig. 5 is the front case of spiral case and the boundary curve figure that rear case launches projection.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
As Fig. 1～shown in Figure 4, the blower volute structure of top-sucking kitchen ventilator comprises upper shell 1, lower shell body 3 and is connected the ring-type middle casing 2 of the two, wherein upper shell 1 is a dissymmetrical structure with lower shell body 3, at snail tongue place, the radius of curvature of lower shell body boundary curve 31 is littler than the radius of curvature of upper shell boundary curve 11, and the middle casing 21 at this place then is connected both with the warp surface of continuously smooth transition; 4 is blower fan among Fig. 1, and 5 is the range hood case, and 7 for driving the motor of blower fan 4;
At snail tongue place, the radius of curvature of described lower shell body boundary curve 31 was good with the ratio of the radius of curvature of upper shell boundary curve 11 with 5: 29.1; Be the best wherein with as shown in Figure 5 scheme, promptly on developed projection, described lower shell body boundary curve 31 at snail tongue place is being formed by connecting by circular arc AB, circular arc BC and circular arc C D rounding off, and the ratio of their radius is R1: R2: R3=259.9: 5: 146; And described upper shell boundary curve 11 at snail tongue place is formed by connecting with straight line AE, circular arc EF and logarithmic spiral FD rounding off, and wherein the radius of circular arc EF is R4: R2=29.1 with the ratio of the radius of circular arc BC: 5
In addition, described upper shell 1 has a tortuosity along the snail tongue and extends upward a tongue piece 6 at the exhaust outlet place, referring to Fig. 1, Fig. 3, with further reduction noise, this tongue piece 6 is that 22: 29.1 and radian are that 90 ° arc plate is the best with the ratio of its radius and circular arc EF radius.
Claims (5)
1, a kind of blower volute structure of top-sucking kitchen ventilator, comprise upper shell, lower shell body and be connected the two ring-type middle casing, it is characterized in that upper shell and lower shell body are dissymmetrical structure, at snail tongue place, the radius of curvature of described lower shell body boundary curve is 5: 29.1 with the ratio of the radius of curvature of upper shell boundary curve, and the middle casing at this place then is connected both with the warp surface of continuously smooth transition.
2, the blower volute structure of top-sucking kitchen ventilator according to claim 1, it is characterized in that, on developed projection, described lower shell body boundary curve is sentenced by circular arc AB, circular arc BC and circular arc C D rounding off at the snail tongue and is formed by connecting, and the ratio of the radius of circular arc AB, BC, CD is 259.9: 5: 146; And described upper shell boundary curve is sentenced straight line AE, circular arc EF and logarithmic spiral FD rounding off is formed by connecting at the snail tongue, and wherein the radius of circular arc EF is 29.1: 5 with the ratio of the radius of circular arc BC;
3, the blower volute structure of top-sucking kitchen ventilator according to claim 1 and 2 is characterized in that, described upper shell has a tortuosity along the snail tongue and extends upward a tongue piece at the exhaust outlet place.
4, the blower volute structure of top-sucking kitchen ventilator according to claim 3 is characterized in that described tongue piece is an arc plate.
5, the blower volute structure of top-sucking kitchen ventilator according to claim 6 is characterized in that described circular arc tongue piece is 90 ° of radians, and its radius is 22: 29.1 with upper shell at the ratio of the radius of curvature of the boundary curve at snail tongue place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011320567A CN1140703C (en) | 2001-10-28 | 2001-10-28 | Blower volute structure of top-sucking kitchen ventilator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011320567A CN1140703C (en) | 2001-10-28 | 2001-10-28 | Blower volute structure of top-sucking kitchen ventilator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1348065A CN1348065A (en) | 2002-05-08 |
| CN1140703C true CN1140703C (en) | 2004-03-03 |
Family
ID=4671101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011320567A Expired - Lifetime CN1140703C (en) | 2001-10-28 | 2001-10-28 | Blower volute structure of top-sucking kitchen ventilator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1140703C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337039C (en) * | 2005-09-09 | 2007-09-12 | 宁波方太厨具有限公司 | Fan volute structure for fan of fume extractor |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100334359C (en) * | 2005-02-08 | 2007-08-29 | 宁波方太厨具有限公司 | Fan Volute structure of ceiling fume exhaustor |
| CN100357611C (en) * | 2006-04-30 | 2007-12-26 | 宁波方太厨具有限公司 | Fan volute structure with air inlets on double sides for European-style smoke exhaust ventilator |
| CN100371645C (en) * | 2006-04-30 | 2008-02-27 | 宁波方太厨具有限公司 | Fan volute structure with air inlets on double sides for European-style smoke exhaust ventilator |
| JP5629505B2 (en) * | 2010-06-25 | 2014-11-19 | 山洋電気株式会社 | Centrifugal fan |
| CN103423203B (en) * | 2013-08-29 | 2015-12-02 | 中联重科股份有限公司 | Centrifugal fan and road sweeper |
| CN103697509A (en) * | 2013-10-31 | 2014-04-02 | 宁波方太厨具有限公司 | Low noise range hood blower fan spiral case |
| DE112016005630T5 (en) | 2015-12-10 | 2018-08-30 | Ihi Corporation | OUTBOARD PART FOR A RADIAL COMPRESSOR |
| CN106583962B (en) * | 2016-12-12 | 2018-12-07 | 杭州老板电器股份有限公司 | Kitchen ventilator centrifugal blower shell welding procedure |
| CN108105160B (en) * | 2017-12-29 | 2020-06-19 | 广东海信家电有限公司 | Volute of centrifugal fan, centrifugal fan and range hood |
| CN111120352B (en) * | 2018-10-30 | 2021-05-18 | 宁波方太厨具有限公司 | Centrifugal fan, range hood applying centrifugal fan and control method |
-
2001
- 2001-10-28 CN CNB011320567A patent/CN1140703C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337039C (en) * | 2005-09-09 | 2007-09-12 | 宁波方太厨具有限公司 | Fan volute structure for fan of fume extractor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1348065A (en) | 2002-05-08 |
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Legal Events
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| AR01 | Abandonment of patent right to avoid double patenting |
According to article 9 of the patent law and article 13 of the detailed rules for the implementation of the patent law: 1132056.7 of the invention patents in this issue as a notice of authorization, and at the same time corresponding to the 01253661.X utility model patent to be given up, and in the 20 volume of the 9 issue of the new type of communique on the patent right to abandon the announcement. |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20040303 |
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| CX01 | Expiry of patent term |