CN205243952U - A spiral case for range hood - Google Patents
A spiral case for range hood Download PDFInfo
- Publication number
- CN205243952U CN205243952U CN201520962390.0U CN201520962390U CN205243952U CN 205243952 U CN205243952 U CN 205243952U CN 201520962390 U CN201520962390 U CN 201520962390U CN 205243952 U CN205243952 U CN 205243952U
- Authority
- CN
- China
- Prior art keywords
- snail tongue
- spiral case
- tongue section
- line
- case molded
- 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.)
- Withdrawn - After Issue
Links
Abstract
The utility model provides a spiral case for range hood, it includes the bounding wall, left side apron, right side apron, left side apron, the both sides at the bounding wall are fixed respectively to right side apron, left side apron, be equipped with the fresh air inlet on the apron of the right side, the bounding wall is close to air outlet department and is provided with the snail tongue, main technical characteristics is that the snail tongue is equipped with five spiral case molded liness, be first spiral case molded lines respectively, second spiral case molded lines, third spiral case molded lines, fourth spiral case molded lines, the 5th spiral case molded lines, article five, four sections regions are split into with the snail tongue to the spiral case molded lines, be first snail tongue section respectively, second snail tongue section, third snail tongue section, fourth snail tongue section, the front face area of second snail tongue section is greater than the front face area of first snail tongue section, the front face area of third snail tongue section is greater than the front face area of fourth snail tongue section. Have the pulse vibration that can improve the snail tongue effectively, reduce the air swirl of air outlet department, so make range hood's noise lower, the vortex still less waits characteristics.
Description
Technical field
The utility model relates to a kind of spiral case for range hood.
Background technology
In the prior art, range hood adopts multi-wing centrifugal fan conventionally, and the feature of this blower fan is that pressure coefficient is high, discharge coefficient is large, can meet under the condition of certain flow and total head, has less volume and noise. In order to ensure larger air quantity, the impeller width that in range hood, centrifugal blower uses is larger.
Taking the centrifugal blower of two sides air intake as example, the mobility status of air in wind wheel, owing to being subject to the effect of inertia, when air enters the shroud of wind wheel and hub disk, its flow direction mainly vertically, to wind wheel mid-game near zone, air circumferentially, finally flows out the air outlet of blower fan in edge gradually with the rotation of wind wheel afterwards. Therefore, double-faced ventilated centrifugal fan air outlet presents the phenomenon that middle part flow velocity is high, both sides flow velocity is low. In the uneven distribution of air outlet place speed, can cause air eddy generation, cause occurring aerodynamic noise. In addition, the snail lingual margin of conventional centrifugal blower parallels to the axis, because the front face area of snail tongue is identical, air-distribution is inhomogeneous, so the impulsive force being subject to is also inhomogeneous, also there will be impulse oscillation noise near snail tongue. For overcoming above-mentioned defect, the spiral case for range hood is improved.
Summary of the invention
Technical problem to be solved in the utility model is that a kind of spiral case for range hood will be provided, and it can improve the impulse oscillation of snail tongue effectively, reduces the air-swirl at air outlet place, so make the noise of range hood lower, eddy current still less.
The technical scheme that the utility model solves its technical problem employing is:
Spiral case comprises coaming plate, left cover, right cover plate, left cover, right cover plate is separately fixed at the both sides of coaming plate, left cover, right cover plate is provided with fresh air inlet, described coaming plate is provided with snail tongue near air outlet place, snail tongue is provided with five spiral case molded line, be respectively the first spiral case molded line, the second spiral case molded line, the 3rd spiral case molded line, the 4th spiral case molded line, the 5th spiral case molded line, article five, snail tongue 4 is divided into four sections of regions by spiral case molded line, be respectively the first snail tongue section, the second snail tongue section, the 3rd snail tongue section, the 4th snail tongue section, the front face area of the second snail tongue section is greater than the front face area of the first snail tongue section, the front face area of the 3rd snail tongue section is greater than the front face area of the 4th snail tongue section.
The left and right width of the first snail tongue section, the second snail tongue section, the 3rd snail tongue section, the 4th snail tongue section correspondence is respectively d1, d2, d3, d4, d1/d2=d4/d3, and the ratio range of d1/d2 is 1/3～2/3.
(d1+d2)/ratio range (d3+d4) is 1/2～3/2.
The spiral case molded line of snail tongue is formed by connecting by straight line AB, camber line BC, camber line CD, camber line DE, camber line EF, camber line FG, straight line GH smooth transition.
Point A and some H are positioned at same level line, and the line AH of the two forms the air outlet edge line of spiral case.
The right side of the first snail tongue section, the corresponding first spiral case molded line in left side of the 4th snail tongue section, the left side of the first snail tongue section, the right side of the second snail tongue section, the left side of the 3rd snail tongue section, the corresponding second spiral case molded line in right side of the 4th snail tongue section, the left side of the second snail tongue section, corresponding the 3rd spiral case molded line in right side of the 3rd snail tongue section, the angle that the first spiral case molded line cathetus A1B1 becomes with straight line A1H1 is β 1, the angle that the second spiral case molded line cathetus A2B2 becomes with straight line A2H2 is β 2, angle between the 3rd spiral case molded line cathetus A3B3 and straight line A3H3 is β 3, span is: 3 >=25 ° of 65 ° >=β, 1 >=β, 2 >=β.
The blade quantity of the wind wheel configuring in spiral case is n, the angle that in the first spiral case molded line, the projection in the plane of vertical and fan shaft of the center of circle of B1C1 and the line at wind wheel center and the center of circle of B2C2 in the second spiral case molded line and the line at wind wheel center becomes is α 2, the angle that in the second spiral case molded line, the projection in the plane of vertical and fan shaft of the center of circle of B2C2 and the line at wind wheel center and the center of circle of B3C3 in the 3rd spiral case molded line and the line at wind wheel center becomes is α 1, the span of α 1 be (180 °/n)～(720 °/n), the span of α 2 be (180 °/n)～(720 °/n).
d1/d2=d4/d3=1/2、r1=15mm、r2=10mm、r3=8mm、α1=360°/n、α2=480°/n。
The first snail tongue section, the second snail tongue section, the 3rd snail tongue section, the 4th snail tongue section, adopt cambered surface rounding off successively.
The utility model is compared produced beneficial effect with background technology:
1, because adopting snail tongue, the utility model is provided with five spiral case molded line, be respectively the first spiral case molded line, the second spiral case molded line, the 3rd spiral case molded line, the 4th spiral case molded line, the 5th spiral case molded line, article five, snail tongue is divided into four sections of regions by spiral case molded line, be respectively the first snail tongue section, the second snail tongue section, the 3rd snail tongue section, the 4th snail tongue section, the front face area of the second snail tongue section is greater than the front face area of the first snail tongue section, the front face area of the 3rd snail tongue section is greater than the front face area of the 4th snail tongue section, therefore it can improve the impulse oscillation of snail tongue effectively, reduce the air-swirl at air outlet place, and then make the noise of range hood lower, eddy current still less.
Brief description of the drawings: Fig. 1 is structural representation of the present utility model.
Fig. 2 is the right view of Fig. 1.
Fig. 3 is the structural representation of snail tongue.
Fig. 4 is the top view of Fig. 3.
Fig. 5 is the schematic diagram of spiral case molded line.
Fig. 6 is the schematic diagram of the first spiral case molded line.
Fig. 7 is the schematic diagram of the second spiral case molded line.
Fig. 8 is the schematic diagram of the 3rd spiral case molded line.
Detailed description of the invention: shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 3, accompanying drawing 4, accompanying drawing 5, accompanying drawing 6, accompanying drawing 7, accompanying drawing 8, the present embodiment comprises coaming plate 1, left cover 2, right cover plate 3, left cover 2, right cover plate 3 are separately fixed at the both sides of coaming plate 1, left cover 2, right cover plate 3 are provided with fresh air inlet, and coaming plate 1 is provided with snail tongue 4 near air outlet place.
Snail tongue 4 is provided with five spiral case molded line, be respectively the first spiral case molded line, the second spiral case molded line, the 3rd spiral case molded line, the 4th spiral case molded line, the 5th spiral case molded line, article five, snail tongue 4 is divided into four sections of regions by spiral case molded line, be respectively the first snail tongue section 41, the second snail tongue section 41, the 3rd snail tongue section 41, the 4th snail tongue section 41, the front face area of the second snail tongue section 41 is greater than the front face area of the first snail tongue section 41, and the front face area of the 3rd snail tongue section 41 is greater than the front face area of the 4th snail tongue section 41. The first snail tongue section 41 left side point tongues, the dark tongue in right side, the second snail tongue section 41 dark tongues in left side, the shallow tongue in right side, the 3rd snail tongue section 41 shallow tongues in left side, the dark tongue in right side, (sharp tongue, dark tongue, shallow tongue are existing professional term for the 4th snail tongue section 41 dark tongues in left side, right side point tongue, in conjunction with the shape of this patent snail tongue, snail tongue is long is called that sharp tongue, snail tongue are short is called shallow tongue), sharp tongue, dark tongue have increased snail tongue lifting surface area, have reduced air outlet minimum sectional area.
The left and right width of the first snail tongue section 41, the second snail tongue section 42, the 3rd snail tongue section 43, the 4th snail tongue section 44 correspondences is respectively d1, d2, d3, d4, d1/d2=d4/d3, and the ratio range of d1/d2 is 1/3～2/3. If d1/d2 < 1/3, sharp tongue section is too short, air outlet both sides sectional area reduces limited, and the first snail tongue section 41 and the 4th snail tongue section 44 stress surface recruitments are less, cannot obviously improve the uneven distribution of air outlet cross section flow velocity and weaken the impulse oscillation that snail tongue is subject to; If same d1/d2 > 2/3, air outlet both sides sectional area reduces too much, the first snail tongue section 41 and the 4th snail tongue section 44 stress surface recruitments are excessive, although the uneven distribution of air outlet cross section flow velocity can further be enhanced, the impulse oscillation that snail tongue is subject to but can increase.
(d1+d2)/ratio range (d3+d4) is 1/2～3/2. If adopt the double-faced ventilated structure of single wind wheel, the line of demarcation of the second snail tongue section 42, the 3rd snail tongue section 43 is by the determining positions of wind wheel mid-game; If adopt two double-faced ventilated structures of wind wheel, line of demarcation is determined by the mid point between adjacent two dishes of two wind wheels.
The spiral case molded line of snail tongue is formed by connecting by straight line AB, camber line BC, camber line CD, camber line DE, camber line EF, camber line FG, straight line GH smooth transition. The method that this kind generates spiral case molded line can be equilateral primitive method, can be also that inequilateral primitive method generates, and its essential characteristic is that four arcs seamlessly transits.
Point A and some H are positioned at same level line, and the line AH of the two forms the air outlet edge line of spiral case, so that the production and processing of spiral case and installation.
The right side of the first snail tongue section 41, the corresponding first spiral case molded line in left side of the 4th snail tongue section 44, the left side of the first snail tongue section 41, the right side of the second snail tongue section 42, the left side of the 3rd snail tongue section 43, the corresponding second spiral case molded line in right side of the 4th snail tongue section 44, the left side of the second snail tongue section 42, corresponding the 3rd spiral case molded line in right side of the 3rd snail tongue section 43, the angle that the first spiral case molded line cathetus A1B1 becomes with straight line A1H1 is β 1, the angle that the second spiral case molded line cathetus A2B2 becomes with straight line A2H2 is β 2, angle between the 3rd spiral case molded line cathetus A3B3 and straight line A3H3 is β 3, span is: 3 >=25 ° of 65 ° >=β, 1 >=β, 2 >=β. excessive or too small air performance, especially static pressure and the air quantity that all destroys blower fan of β, the diffuser that GHAB section is blower fan, Main Function is that dynamic pressure is converted to static pressure, β is larger, static pressure is larger, air quantity reduces, on the contrary β is less, static pressure is less.
The blade quantity of the wind wheel configuring in spiral case is n, the angle that in the first spiral case molded line, the projection in the plane of vertical and fan shaft of the center of circle of B1C1 and the line at wind wheel center and the center of circle of B2C2 in the second spiral case molded line and the line at wind wheel center becomes is α 2, the angle that in the second spiral case molded line, the projection in the plane of vertical and fan shaft of the center of circle of B2C2 and the line at wind wheel center and the center of circle of B3C3 in the 3rd spiral case molded line and the line at wind wheel center becomes is α 1, the span of α 1 be (180 °/n)～(720 °/n), the span of α 2 be (180 °/n)～(720 °/n). α scope major limitation the degree of sharp tongue, dark tongue, α is larger, snail tongue is sharper, darker, blower fan economic work region is less, α is less, snail tongue is more shallow, although blower fan economic work region has increased, but being not reflected the effect of sharp tongue, dark tongue---sharp tongue, dark tongue have increased snail tongue lifting surface area, have reduced air outlet minimum sectional area.
The blade quantity of wind wheel is n, and 360 ° of whole circumference are divided into n gas channel, and a corresponding angle of gas channel is (360/n) °. Through experimental test, under the designed worm frame of the utility model, angle α 1, α 2 (180 °/n)～(720 °/n) between time, inhomogeneous air-flow causes that the impulse oscillation of snail tongue or eddy current crack are significantly reduced.
d1/d2=d4/d3=1/2、r1=15mm、r2=10mm、r3=8mm、α1=360°/n、α2=480°/n。
Wherein preferred value, d1/d2=d4/d3=1/2, r1=15mm, r2=10mm, r3=8mm, α 1=360 °/n, α 2=480 °/n, experiment shows this value, blower air performance is better.
The first snail tongue section 41, the second snail tongue section 42, the 3rd snail tongue section 43, the 4th snail tongue section 44, adopt cambered surface rounding off successively, and experiment shows that cambered surface transition meeting is better than non-cambered surface transition.
Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that in the situation that not departing from principle of the present utility model and spirit and can carry out multiple variation, amendment, replacement and modification to these embodiment, scope of the present utility model is by claims and be equal to and limit.
Claims (9)
1. the spiral case for range hood, it comprises coaming plate (1), left cover (2), right cover plate (3), left cover (2), right cover plate (3) is separately fixed at the both sides of coaming plate (1), left cover (2), right cover plate (3) is provided with fresh air inlet, described coaming plate (1) is provided with snail tongue (4) near air outlet place, it is characterized in that snail tongue (4) is provided with five spiral case molded line, be respectively the first spiral case molded line, the second spiral case molded line, the 3rd spiral case molded line, the 4th spiral case molded line, the 5th spiral case molded line, article five, snail tongue (4) is divided into four sections of regions by spiral case molded line, be respectively the first snail tongue section (41), the second snail tongue section (42), the 3rd snail tongue section (43), the 4th snail tongue section (44), the front face area of the second snail tongue section (42) is greater than the front face area of the first snail tongue section (41), the front face area of the 3rd snail tongue section (43) is greater than the front face area of the 4th snail tongue section (44).
2. the spiral case for range hood according to claim 1, it is characterized in that the first described snail tongue section (41), the second snail tongue section (42), the 3rd snail tongue section (43), left and right width corresponding to the 4th snail tongue section (44) are respectively d1, d2, d3, d4, d1/d2=d4/d3, the ratio range of d1/d2 is 1/3～2/3.
3. the spiral case for range hood according to claim 2, it is characterized in that (d1+d2)/ratio range (d3+d4) is 1/2～3/2.
4. the spiral case for range hood according to claim 3, is characterized in that the spiral case molded line of described snail tongue is formed by connecting by straight line AB, camber line BC, camber line CD, camber line DE, camber line EF, camber line FG, straight line GH smooth transition.
5. the spiral case for range hood according to claim 4, is characterized in that an A and some H are positioned at same level line, and the line AH of the two forms the air outlet edge line of spiral case.
6. the spiral case for range hood according to claim 5, it is characterized in that the right side of the first described snail tongue section (41), the corresponding first spiral case molded line in left side of the 4th snail tongue section (44), the left side of the first snail tongue section (41), the right side of the second snail tongue section (42), the left side of the 3rd snail tongue section (43), the corresponding second spiral case molded line in right side of the 4th snail tongue section (44), the left side of the second snail tongue section (42), corresponding the 3rd spiral case molded line in right side of the 3rd snail tongue section (43), the angle that the first spiral case molded line cathetus A1B1 becomes with straight line A1H1 is β 1, the angle that the second spiral case molded line cathetus A2B2 becomes with straight line A2H2 is β 2, angle between the 3rd spiral case molded line cathetus A3B3 and straight line A3H3 is β 3, span is: 3 >=25 ° of 65 ° >=β, 1 >=β, 2 >=β.
7. the spiral case for range hood according to claim 6, the blade quantity that it is characterized in that the wind wheel configuring in described spiral case is n, the angle that in the first spiral case molded line, the projection in the plane of vertical and fan shaft of the center of circle of B1C1 and the line at wind wheel center and the center of circle of B2C2 in the second spiral case molded line and the line at wind wheel center becomes is α 2, the angle that in the second spiral case molded line, the projection in the plane of vertical and fan shaft of the center of circle of B2C2 and the line at wind wheel center and the center of circle of B3C3 in the 3rd spiral case molded line and the line at wind wheel center becomes is α 1, the span of α 1 be (180 °/n)～(720 °/n), the span of α 2 be (180 °/n)～(720 °/n).
8. the spiral case for range hood according to claim 7, is characterized in that described d1/d2=d4/d3=1/2, r1=15mm, r2=10mm, r3=8mm, α 1=360 °/n, α 2=480 °/n.
9. the spiral case for range hood according to claim 8, is characterized in that described the first snail tongue section (41), the second snail tongue section (42), the 3rd snail tongue section (43), the 4th snail tongue section (44), adopts successively cambered surface rounding off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520962390.0U CN205243952U (en) | 2015-11-28 | 2015-11-28 | A spiral case for range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520962390.0U CN205243952U (en) | 2015-11-28 | 2015-11-28 | A spiral case for range hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205243952U true CN205243952U (en) | 2016-05-18 |
Family
ID=55943037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520962390.0U Withdrawn - After Issue CN205243952U (en) | 2015-11-28 | 2015-11-28 | A spiral case for range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205243952U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332951A (en) * | 2015-11-28 | 2016-02-17 | 广东万和新电气股份有限公司 | Volute applied to extractor hood |
| 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 |
| CN108612674A (en) * | 2018-03-22 | 2018-10-02 | 海信科龙电器股份有限公司 | A kind of centrifugal blower and air conditioner |
| CN109083853A (en) * | 2018-10-24 | 2018-12-25 | 奥克斯空调股份有限公司 | A kind of blower fan structure and air conditioner |
-
2015
- 2015-11-28 CN CN201520962390.0U patent/CN205243952U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332951A (en) * | 2015-11-28 | 2016-02-17 | 广东万和新电气股份有限公司 | Volute applied to extractor hood |
| 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 |
| CN108612674A (en) * | 2018-03-22 | 2018-10-02 | 海信科龙电器股份有限公司 | A kind of centrifugal blower and air conditioner |
| CN109083853A (en) * | 2018-10-24 | 2018-12-25 | 奥克斯空调股份有限公司 | A kind of blower fan structure and air conditioner |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205243952U (en) | A spiral case for range hood | |
| CN105332951A (en) | Volute applied to extractor hood | |
| CN102182707B (en) | Centrifugal fan for oil and smoke exhaust machine and method for manufacturing volute profile line thereof | |
| CN105756975B (en) | The axial flow blower that a kind of blade inlet edge is blown with groove structure and blade root | |
| CN104196761A (en) | Double-air-inlet centrifugal fan | |
| CN203756593U (en) | High-efficient centrifugal wind wheel | |
| CN104343732B (en) | A kind of blower fan snail tongue structure for range hood | |
| CN104791296A (en) | Structure of centrifugal fan impeller | |
| CN105257598A (en) | Volute casing of fan with oblique ladder volute tongue | |
| CN202326414U (en) | Axial-flow fan | |
| CN206071950U (en) | A kind of silent ventilator system of lampblack absorber | |
| CN103122872B (en) | Axial fan | |
| CN203770236U (en) | Range hood centrifugal fan with double air inlet structures | |
| CN110159591A (en) | A kind of volute tongue structure and application have the centrifugal blower of the volute tongue structure | |
| CN100371645C (en) | Fan volute structure with air inlets on double sides for European-style smoke exhaust ventilator | |
| CN206845543U (en) | A kind of centrifugal blower volute for range hood | |
| KR100862121B1 (en) | Fan of an air conditioner | |
| CN203420934U (en) | Axial flow fan and air conditioner | |
| CN203978927U (en) | A kind of pair of air intake centrifugal blower fan | |
| KR20140039976A (en) | Propeller fan | |
| CN110657127A (en) | Blade for centrifugal fan impeller, centrifugal fan impeller and range hood | |
| CN205117815U (en) | Slope ladder snail tongue volute blower | |
| CN213450988U (en) | Centrifugal impeller and ventilator thereof | |
| CN205639001U (en) | Axial fan that winglet and ye ding have air -blowing structure is worn to blade pressure | |
| CN204984995U (en) | Range hood |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160518 Effective date of abandoning: 20181009 |