CN202483954U - Centrifugal blower volute of range hood - Google Patents
Centrifugal blower volute of range hood Download PDFInfo
- Publication number
- CN202483954U CN202483954U CN2011205580236U CN201120558023U CN202483954U CN 202483954 U CN202483954 U CN 202483954U CN 2011205580236 U CN2011205580236 U CN 2011205580236U CN 201120558023 U CN201120558023 U CN 201120558023U CN 202483954 U CN202483954 U CN 202483954U
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- volute
- spiral case
- centrifugal blower
- tongue
- boarding
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Abstract
The utility model relates to a centrifugal blower volute of a range hood. The centrifugal blower volute comprises a volute top plate, a volute bottom plate, a volute boarding and a volute flange, wherein the volute top plate is provided with an air inlet; the volute bottom plate is provided with a motor mounting hole; the volute boarding is a continuously smooth curved plate, and two ends of the volute boarding are respectively connected with the volute top plate and the volute bottom plate; the volute boarding comprises an arc surface and a spiral surface; a volute tongue body is arranged at the arc surface of the volute boarding; and the volute tongue body comprises a volute tongue surface. The centrifugal blower volute is characterized in that the volute tongue surface is of a wave crest shape. Because a wave-crest-shaped structure is adopted and exactly tallied with airflow distribution at an impeller outlet, the generation of flow separation above the volute tongue close to a volute outlet can be prevented or the degree of flow separation is reduced, the bigger adverse pressure gradient is avoided, the possibility of generating backflow is reduced greatly, the air volume, air pressure and efficiency of the blower can be effectively improved, and meanwhile, the function of reducing eddy noise is realized. In addition, the pulse airflow phases acting on the volute tongue are staggered and the pulse force on the volute tongue is reduced, so that the function of reducing rotation noise is achieved.
Description
Technical field
The utility model is a kind of centrifugal blower volute of range hood, belongs to the renovation technique of range hood centrifugal blower volute.
Background technique
At present, range hood has become one of requisite kitchen fitting of ordinary family.Advantages such as centrifugal blower is big with its suction, compact structure obtain extensive use in cooking fume control equipment.The raising of Along with people's quality of the life and country be to the putting teeth in of household electric appliance noise standard, and the low noise of range hood has been proposed more and more harsher requirement.
Have tongue structure near the centrifugal blower volute outlet, be called the snail tongue, its air-flow that spiral case exports that will lead is shunted, and prevents that portion gas from circulating in spiral case.According to the length of snail tongue and the snail tongue difference from the radial distance of impeller, the snail tongue is divided into forms such as sharp tongue, dark tongue, shallow tongue peace tongue.The point tongue is the longest and the shortest from the radial distance of impeller, and is the most favourable to air quantity, blast and efficient, but noise is maximum; And flat tongue is the shortest and the longest from the radial distance of impeller, and to air quantity, blast and efficient least favorable, but noise is minimum.For the centrifugal blower of single admission, because air-flow need turn over 90 ° from the impeller inlet to the impeller outlet, there is bigger flow separation in impeller outlet near the shroud side; Form the vortex of low speed; So just cause impeller outlet speed skewness vertically, high near impeller hub disk side speed, low near impeller shroud side speed; The velocity distribution of impeller outlet air-flow is the spike shape from front to back, shown in accompanying drawing 6.If adopt straight snail tongue, just can't take into account this uneven impeller outlet air-flow.Adopt sharp tongue,, can reduce this part air-flow greatly and produce the probability that refluxes, but, can produce very big Rotation Noise unfavorable near the high speed exit flow of impeller hub disk side to favourable near the low speed exit flow of impeller shroud side.Adopt flat tongue then to favourable near the high speed exit flow of impeller hub disk side, but to very unfavorable near the low speed exit flow of impeller shroud side, be easy to produce and reflux, air quantity, blast and efficient all can sharply descend.
Summary of the invention
The purpose of the utility model is to consider the problems referred to above and a kind of easily manufactured band crest shape snail tongue is provided, designs the centrifugal blower volute of ingenious, convenient and practical range hood.
The technological scheme of the utility model is: a kind of centrifugal blower volute of range hood; Comprise spiral case top board, spiral case base plate, spiral case coaming plate and spiral case flange; Wherein said spiral case top board is provided with intake grill, and said spiral case base plate is provided with the motor mounting hole, and said spiral case coaming plate is that smooth curved plate and its two ends are connected with spiral case top board, spiral case base plate respectively continuously; The spiral case coaming plate comprises arc surface and helicoid; Spiral case coaming plate arc surface place is provided with the snail tongue body, and said snail tongue body comprises the snail lingual surface, it is characterized in that said snail lingual surface is the crest shape.
The independent moulding of said snail tongue body, the snail tongue body also comprises front-end face, ear end face and junction surface, and wherein said front-end face is provided with over against the spiral case top board, and said ear end face is provided with over against the spiral case base plate, and said junction surface is over against the arc surface setting of spiral case coaming plate.
Said snail lingual surface is being a trough near spiral case top board one side, is being crest near spiral case base plate one side.
Said snail tongue body can with one or more fixed connection the in spiral case top board, spiral case base plate, the spiral case coaming plate.
The utility model advantage compared with prior art is: the snail tongue of spiral case is owing to adopted crest shape mode of structure; Distribute just identical with the air-flow of impeller outlet; Can prevent above the snail tongue to produce flow separation or to reduce the degree of flow separation, avoid forming bigger adverse pressure gradient, reduce producing the probability that refluxes greatly near the spiral case outlet port; Can effectively improve air quantity, blast and the efficient of blower fan, play the effect that reduces eddy current crack simultaneously.In addition, also can make the pulsing airflow phase shifting that acts on the snail tongue, reduce the impulsive force on the snail tongue, thereby reach the effect that reduces rotational noise.
Description of drawings
Fig. 1 is the structural representation of the utility model centrifugal blower volute;
Fig. 2 is the left view of the utility model centrifugal blower volute;
Fig. 3 is the rear view of the utility model centrifugal blower volute;
Fig. 4 is the structural representation of snail tongue body;
Fig. 5 is the projection view of snail tongue body along the F direction;
Fig. 6 is the velocity distribution schematic diagram of single air intake centrifugal draught fan impeller outlet.
Embodiment
To combine accompanying drawing and embodiment that the utility model is done further detailed description below:
Shown in Fig. 1 to 3; Comprise spiral case top board 1, spiral case base plate 2, spiral case coaming plate 3 and spiral case flange 4; Wherein said spiral case top board 1 is provided with intake grill 11, and said spiral case base plate 2 is provided with motor mounting hole 21, said spiral case coaming plate 3 be continuously smooth curved plate and its two ends respectively with spiral case top board 1 and 2 vertical connections of spiral case base plate; Spiral case coaming plate 3 comprises arc surface 31 and helicoid 32; Spiral case coaming plate arc surface 31 places are provided with snail tongue body 5, and snail tongue body 5 comprises snail lingual surface 51, and the utility model characteristics are that said snail lingual surface 51 is the crest shape.
In the present embodiment; Like Fig. 4, shown in 5; Said snail tongue body 5 independent moulding, snail tongue body 5 also comprises front-end face 52, ear end face 53 and junction surface 54, wherein said front-end face 52 is provided with over against spiral case top board 1; Said ear end face 53 is provided with over against spiral case base plate 2, and said junction surface 54 is provided with over against the arc surface 31 of spiral case coaming plate 3.
In the present embodiment, said snail lingual surface 51 is being a trough near spiral case top board 1 one sides, is being crest near spiral case base plate 2 one sides.
In the present embodiment, said snail tongue body 5 can with one or more fixed connection the in spiral case top board 1, spiral case base plate 2, the spiral case coaming plate 3.
Claims (4)
1. the centrifugal blower volute of a range hood; Comprise spiral case top board (1), spiral case base plate (2), spiral case coaming plate (3) and spiral case flange (4); Wherein said spiral case top board (1) is provided with intake grill (11); Said spiral case base plate is provided with motor mounting hole (21); Said spiral case coaming plate (3) is that smooth curved plate and its two ends are connected with spiral case top board (1), spiral case base plate (2) respectively continuously, and spiral case coaming plate (3) comprises arc surface (31) and helicoid (32), and spiral case coaming plate arc surface (31) locates to be provided with snail tongue body (5); Said snail tongue body (5) comprises snail lingual surface (51), it is characterized in that said snail lingual surface (51) is the crest shape.
2. the centrifugal blower volute of range hood according to claim 1; It is characterized in that said snail tongue body (5) moulding separately; Snail tongue body (5) also comprises front-end face (52), ear end face (53) and junction surface (54); Wherein said front-end face (52) is provided with over against spiral case top board (1), and said ear end face (53) is provided with over against spiral case base plate (2), and said junction surface (54) is provided with over against the arc surface (31) of spiral case coaming plate (3).
3. according to the centrifugal blower volute of claim 1 or the described range hood of claim 2, it is characterized in that said snail lingual surface (51) is being a trough near spiral case top board (1) one side, is being crest near spiral case base plate (2) one sides.
4. the centrifugal blower volute of range hood according to claim 1 and 2, it is characterized in that said snail tongue body (5) can with one or more fixed connection the in spiral case top board (1), spiral case base plate (2), the spiral case coaming plate (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205580236U CN202483954U (en) | 2011-12-28 | 2011-12-28 | Centrifugal blower volute of range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205580236U CN202483954U (en) | 2011-12-28 | 2011-12-28 | Centrifugal blower volute of range hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202483954U true CN202483954U (en) | 2012-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205580236U Expired - Lifetime CN202483954U (en) | 2011-12-28 | 2011-12-28 | Centrifugal blower volute of range hood |
Country Status (1)
| Country | Link |
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| CN (1) | CN202483954U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089707A (en) * | 2013-03-11 | 2013-05-08 | 中国船舶重工集团公司第七0四研究所 | Centrifugal-type modularized volute |
| CN104047895A (en) * | 2014-06-23 | 2014-09-17 | 西安交通大学 | Low-noise range hood double-suction fan volute with lower edge adopting circular arc transition |
| CN106030213A (en) * | 2013-10-18 | 2016-10-12 | 盈得喜股份有限公司 | Household cooking appliance |
| CN106438485A (en) * | 2016-11-08 | 2017-02-22 | 广东美的厨房电器制造有限公司 | Volute of extractor hood and extractor hood |
| CN107270354A (en) * | 2017-07-31 | 2017-10-20 | 广东美的厨房电器制造有限公司 | Fan assembly and range hood |
| WO2024055614A1 (en) * | 2022-09-15 | 2024-03-21 | 佛山市顺德区美的电热电器制造有限公司 | Range hood assembly and integrated cooker |
-
2011
- 2011-12-28 CN CN2011205580236U patent/CN202483954U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089707A (en) * | 2013-03-11 | 2013-05-08 | 中国船舶重工集团公司第七0四研究所 | Centrifugal-type modularized volute |
| CN106030213A (en) * | 2013-10-18 | 2016-10-12 | 盈得喜股份有限公司 | Household cooking appliance |
| CN104047895A (en) * | 2014-06-23 | 2014-09-17 | 西安交通大学 | Low-noise range hood double-suction fan volute with lower edge adopting circular arc transition |
| CN104047895B (en) * | 2014-06-23 | 2017-02-08 | 西安交通大学 | Low-noise range hood double-suction fan volute with lower edge adopting circular arc transition |
| CN106438485A (en) * | 2016-11-08 | 2017-02-22 | 广东美的厨房电器制造有限公司 | Volute of extractor hood and extractor hood |
| CN107270354A (en) * | 2017-07-31 | 2017-10-20 | 广东美的厨房电器制造有限公司 | Fan assembly and range hood |
| WO2024055614A1 (en) * | 2022-09-15 | 2024-03-21 | 佛山市顺德区美的电热电器制造有限公司 | Range hood assembly and integrated cooker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121010 |