CN108105160A - A kind of spiral case of centrifugal blower, centrifugal blower and range hood - Google Patents
A kind of spiral case of centrifugal blower, centrifugal blower and range hood Download PDFInfo
- Publication number
- CN108105160A CN108105160A CN201711482601.0A CN201711482601A CN108105160A CN 108105160 A CN108105160 A CN 108105160A CN 201711482601 A CN201711482601 A CN 201711482601A CN 108105160 A CN108105160 A CN 108105160A
- Authority
- CN
- China
- Prior art keywords
- molded line
- spiral case
- line section
- centrifugal blower
- 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.)
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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
-
- 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
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 spiral case of centrifugal blower, centrifugal blower and range hoods, are related to range hood technical field, can solve the problems, such as that the spiral case of the existing centrifugal blower noise when improving airflow pressure is higher.The spiral case of centrifugal blower of the present invention, the molded line of the spiral case includes sequentially connected first molded line section, Second-Type line segment, the 3rd molded line section and the 4th molded line section, the 3rd molded line section forms the main body of the spiral case, the Second-Type line segment forms the volute tongue of the spiral case, the first molded line section and the 4th molded line section form the outlet of the spiral case, connected two molded line section continual curvatures.The present invention is oriented to volute outlet for that will leave the gas of impeller, and the part dynamic pressure of gas is changed into static pressure.
Description
Technical field
The present invention relates to a kind of range hood technical field more particularly to spiral case of centrifugal blower, centrifugal blower and oil suctions
Smoke machine.
Background technology
Centrifugal blower with its suction it is big, compact-sized the advantages that obtain extensive use in the household electrical appliance such as range hood.
Spiral case is one of core component of centrifugal blower, and effect is that the gas for leaving impeller is oriented to volute outlet, and by gas
Part dynamic pressure is changed into static pressure.
With reference to Fig. 1, the molded line of spiral case of the prior art includes sequentially connected first molded line section AB, Second-Type line segment
BC, the 3rd molded line section CD and the 4th molded line section DE, the 3rd molded line section CD form the main body of spiral case, and Second-Type line segment BC is circle
Arc, forms the volute tongue of spiral case, and the first molded line section AB and the 4th molded line section DE form the outlet of spiral case；
Fig. 2 is the partial enlarged view of Fig. 1, and with reference to Fig. 2, the curvature of each point is equal on arc-shaped Second-Type line segment BC,
And it is larger, and the first molded line section AB is straight line, is thereon 0 with the curvature of the Second-Type line segment BC points to connect, the 3rd molded line section CD
Upper also smaller with the curvature of the Second-Type line segment BC points to connect, i.e. the curvature of these molded line sections is discontinuous, therefore is improving air quantity
Can be there are larger flow separation and impact loss at volute tongue during wind pressure, and then cause noise higher.
The content of the invention
The embodiment of the present invention provides a kind of spiral case of centrifugal blower, centrifugal blower and range hood, can solve it is existing from
The spiral case of heart wind turbine the problem of noise is higher when improving airflow pressure.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that：
An embodiment of the present invention provides a kind of spiral case of centrifugal blower, the molded line of the spiral case includes sequentially connected first
Molded line section, Second-Type line segment, the 3rd molded line section and the 4th molded line section, the 3rd molded line section form the main body of the spiral case,
The Second-Type line segment forms the volute tongue of the spiral case, and the first molded line section and the 4th molded line section form the spiral case
Outlet, connected two molded line section continual curvatures.
The embodiment of the present invention additionally provides a kind of centrifugal blower, including above-mentioned spiral case.
The embodiment of the present invention additionally provides a kind of range hood, including above-mentioned centrifugal blower.
Spiral case, centrifugal blower and the range hood of centrifugal blower provided in an embodiment of the present invention, due to two connected types
Line segment continual curvature, i.e. the first molded line section and Second-Type line segment smooth connection, curvature is equal at tie point and direction is identical, the
Two molded line sections and the 3rd molded line section smooth connection, curvature is equal at tie point and direction is identical, the 3rd molded line section and the 4th type
Line segment smooth connection, curvature is equal at tie point and direction is identical, therefore the flowing when improving airflow pressure at volute tongue point
It is smaller from impact loss, so as to reduce noise.
Description of the drawings
It in order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the curvature comb of centrifugal blower volute in the prior art；
Fig. 2 is the partial enlarged view of Fig. 1；
Fig. 3 is that the curvature of centrifugal blower volute of the embodiment of the present invention is combed；
Fig. 4 is the partial enlarged view of Fig. 3；
Fig. 5 is the design principle figure of centrifugal blower volute molded line of the embodiment of the present invention；
Fig. 6 is the stereogram of centrifugal blower volute of the embodiment of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only the embodiment of one section of point of embodiment rather than full section of the invention.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment belongs to the scope of protection of the invention.
In the description of the present invention, it is to be understood that term " " center ", " on ", " under ", "front", "rear", " left side ",
The orientation or position relationship of the instructions such as " right side ", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are based on shown in the drawings
Orientation or position relationship, be for only for ease of the description present invention and simplify description rather than instruction or imply signified device or
Element must have specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
Term " first ", " second " be only used for description purpose, and it is not intended that instruction or imply relative importance or
The implicit quantity for indicating indicated technical characteristic." first " is defined as a result, the feature of " second " can be expressed or imply
Ground includes one or more this feature.
In the description of the present invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or be integrally connected；It can
It to be to be connected directly, can also be indirectly connected by intermediary, can be the connection inside two elements.For this field
For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
Fig. 3 to Fig. 6 is a specific embodiment of the spiral case of centrifugal blower of the embodiment of the present invention, with reference to Fig. 3 and Fig. 4, sheet
The spiral case of centrifugal blower in embodiment, the molded line of spiral case include sequentially connected first molded line section AB, Second-Type line segment BC, the
Three molded line section CD and the 4th molded line section DE, the 3rd molded line section CD form the main body of spiral case, and Second-Type line segment BC forms spiral case
Volute tongue, the first molded line section AB and the 4th molded line section DE form the outlet of spiral case, connected two molded line section continual curvatures.It needs
Bright, each molded line section is smooth.
The spiral case of centrifugal blower provided in an embodiment of the present invention, due to two connected molded line section continual curvatures, i.e., first
Molded line section AB and Second-Type line segment BC smooth connections, curvature is equal at tie point B and direction is identical, Second-Type line segment BC and
Three molded line section CD smooth connections, curvature is equal at tie point C and direction is identical, the 3rd molded line section CD and the 4th molded line section DE light
Along connection, curvature is equal at tie point D and direction is identical, therefore the flow separation at volute tongue and punching when improving airflow pressure
It is smaller to hit loss, so as to reduce noise.
First molded line section AB can be straight line or curve, and with reference to 3 to Fig. 5, the present embodiment preferably the first molded line section AB is straight
Line is made with facilitating, and one end As of the first molded line section AB away from Second-Type line segment BC inclines to the direction away from the 4th molded line section DE
Tiltedly, i.e. one end As of the first molded line section AB away from Second-Type line segment BC is tilted to the right, and can so reduce air-flow and the first molded line section AB
Impact, so as to reduce impact loss, at this time Second-Type line segment BC compared with prior art in arc-shaped indent more to the left,
So as to reduce reflux, and then improve the efficiency of centrifugal blower.
With reference to Fig. 5, impeller 100 can be set in spiral case, using the center O of impeller 100 as the center of circle, with the 3rd molded line section CD and leaf
The minimum range of 100 center O is taken turns for radius work to justify, if the intersection point of the extended line of the first molded line section AB and circle is G, the first molded line section
The angle of AB and straight line OG is 120 °~170 ° (in practical application optional 135 °), thus can make the first molded line section AB and straight line OG
Angle it is moderate, one end As of the first molded line section AB away from Second-Type line segment BC on the one hand can be avoided to be tilted to the right excessive, so as to
Avoid the problem of flow separation is excessive, on the other hand can avoid one end As of the first molded line section AB away from Second-Type line segment BC to
It is right-oblique very few, so as to avoid impact loss it is excessive the problem of.
The generation method of Second-Type line segment BC is：It, then will circle to the first molded line section AB and the 3rd molded line section CD rounded corners
The both ends at angle are connected by BridgeCurve, you can generation Second-Type line segment BC.Impeller 100 can be set in spiral case, if impeller 100
Outer diameter is d, and the value range of the radius R of tangent circle is 0.05d~0.1d with the first molded line section AB and the 3rd molded line section CD
(in practical application can use 0.05d) with the circle to the first molded line section AB and the 3rd molded line section CD rounded corners, can make the both ends of fillet
Apart from moderate, on the one hand can avoid because fillet both ends apart from it is excessive due to cause Second-Type line segment BC not enough indents to the left, and then
Cause to flow back larger, it is less efficient the problem of, on the other hand can avoid because fillet both ends apart from it is too small due to cause Second-Type line segment
BC is excessively sharp, and then the problem of cause noise larger.
If the action of tangent minor arc is m with the first molded line section AB and the 3rd molded line section CD, on Second-Type line segment BC most
The distance n of position away from minor arc to the string of minor arc is 1.5m~2.5m (can use 2m in practical application), thus on the one hand can be kept away
The distance exempted from Second-Type line segment BC farthest away from the position of minor arc to the string of minor arc is excessive, so as to reduce flow separation and impact
Loss, on the other hand can avoid the distance on Second-Type line segment BC farthest away from the position of minor arc to the string of minor arc too small, so as to subtract
Small reflux, improves efficiency.
3rd molded line section CD can be log spiral, spiral of Archimedes, involute etc., preferably the in the present embodiment
Three molded line section CD are angle of flare log spiral equal always, so that the pneumatic efficiency highest of centrifugal blower.
4th molded line section DE can be straight line or curve, and the present embodiment preferably the 4th molded line section DE is curve, convenient for transition
To interface tube.
Impeller 100 can be set in spiral case, and along the axis direction of impeller 100, by both ends to centre in volute tongue, curvature is gradual
Reduce, i.e., be gradually recessed in volute tongue along 100 axis direction of impeller from both ends to intermediate to upper right side, and concave face F is smooth continuous,
As shown in fig. 6, so can discrete air flow and volute tongue percussion, so as to effectively reduce Rotation Noise.
The embodiment of the present invention additionally provides a kind of centrifugal blower, including the spiral case described in any of the above-described embodiment.
The embodiment of the present invention additionally provides a kind of range hood, including the centrifugal blower described in above-described embodiment.
Centrifugal blower and range hood provided in an embodiment of the present invention, due to what is be connected in the molded line of the spiral case of centrifugal blower
Two molded line section continual curvatures, i.e. the first molded line section AB and Second-Type line segment BC smooth connections, at tie point B curvature it is equal and
Direction is identical, and Second-Type line segment BC and the 3rd molded line section CD smooth connections, curvature is equal at tie point C and direction is identical, the
Three molded line section CD and the 4th molded line section DE smooth connections, curvature is equal at tie point D and direction is identical, therefore is improving air quantity
Flow separation and impact loss during wind pressure at volute tongue is smaller, so as to reduce noise.
On centrifugal blower of the embodiment of the present invention, range hood other form etc. it is ripe for those skilled in the art
Know, be no longer described in detail herein.
The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in change or replacement, should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of spiral case of centrifugal blower, which is characterized in that the molded line of the spiral case includes sequentially connected first molded line section, the
Two molded line sections, the 3rd molded line section and the 4th molded line section, the 3rd molded line section form the main body of the spiral case, the Second-Type
Line segment forms the volute tongue of the spiral case, and the first molded line section and the 4th molded line section form the outlet of the spiral case, be connected
Two molded line section continual curvatures.
2. spiral case according to claim 1, which is characterized in that the first molded line section is straight line, and first molded line
The one end of section away from the Second-Type line segment is tilted to the direction away from the 4th molded line section.
3. spiral case according to claim 2, which is characterized in that impeller can be set in the spiral case, in the impeller
Heart O is the center of circle, is justified using the 3rd molded line section and the minimum range of the impeller center O as radius work, if first molded line
The extended line of section is G with the intersection point of the circle, and the first molded line section and the angle of straight line OG are 120 °~170 °.
4. spiral case according to claim 2, which is characterized in that impeller can be set in the spiral case, if the impeller is outer
Footpath is D, with the first molded line section and the 3rd molded line section value range of the radius of tangent circle for 0.05D~
0.1D。
5. spiral case according to claim 4, which is characterized in that set and the first molded line section and the 3rd molded line Duan Jun
The action of tangent minor arc is m, the distance of the string on the Second-Type line segment farthest away from the position of the minor arc to the minor arc
For 1.5m~2.5m.
6. spiral case according to claim 1, which is characterized in that the 3rd molded line section is log spiral.
7. spiral case according to claim 1, which is characterized in that the 4th molded line section is curve.
8. spiral case according to claim 1, which is characterized in that impeller can be set in the spiral case, along the axis of the impeller
Line direction is gradually reduced by both ends to centre, curvature in the volute tongue.
9. a kind of centrifugal blower, which is characterized in that including spiral case according to any one of claims 1 to 8.
10. a kind of range hood, which is characterized in that including the centrifugal blower described in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711482601.0A CN108105160B (en) | 2017-12-29 | 2017-12-29 | Volute of centrifugal fan, centrifugal fan and range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711482601.0A CN108105160B (en) | 2017-12-29 | 2017-12-29 | Volute of centrifugal fan, centrifugal fan and range hood |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108105160A true CN108105160A (en) | 2018-06-01 |
| CN108105160B CN108105160B (en) | 2020-06-19 |
Family
ID=62215137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711482601.0A Active CN108105160B (en) | 2017-12-29 | 2017-12-29 | Volute of centrifugal fan, centrifugal fan and range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108105160B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855613A (en) * | 2021-01-19 | 2021-05-28 | 广州市永佳环保设备有限公司 | Noise-reduction centrifugal fan |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0565897A (en) * | 1991-09-04 | 1993-03-19 | Yasui:Kk | Centrifugal blower |
| CN1348065A (en) * | 2001-10-28 | 2002-05-08 | 宁波方太厨具有限公司 | Blower volute structure of top-sucking kitchen ventilator |
| CN1651772A (en) * | 2005-02-08 | 2005-08-10 | 宁波方太厨具有限公司 | Fan Volute structure of ceiling fume exhaustor |
| CN1752460A (en) * | 2005-09-09 | 2006-03-29 | 宁波方太厨具有限公司 | Fan volute structure for fan of fume extractor |
| CN102518603A (en) * | 2011-12-19 | 2012-06-27 | 海尔集团公司 | Fan of range hood and range hood provided with same |
| CN105736469A (en) * | 2016-04-05 | 2016-07-06 | 珠海格力电器股份有限公司 | Fan, fan volute and air conditioner |
| CN106765388A (en) * | 2016-12-20 | 2017-05-31 | 美的集团股份有限公司 | Fume extractor |
| CN107062331A (en) * | 2017-04-11 | 2017-08-18 | 广东美的智美科技有限公司 | Fume extractor |
-
2017
- 2017-12-29 CN CN201711482601.0A patent/CN108105160B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0565897A (en) * | 1991-09-04 | 1993-03-19 | Yasui:Kk | Centrifugal blower |
| CN1348065A (en) * | 2001-10-28 | 2002-05-08 | 宁波方太厨具有限公司 | Blower volute structure of top-sucking kitchen ventilator |
| CN1651772A (en) * | 2005-02-08 | 2005-08-10 | 宁波方太厨具有限公司 | Fan Volute structure of ceiling fume exhaustor |
| CN1752460A (en) * | 2005-09-09 | 2006-03-29 | 宁波方太厨具有限公司 | Fan volute structure for fan of fume extractor |
| CN102518603A (en) * | 2011-12-19 | 2012-06-27 | 海尔集团公司 | Fan of range hood and range hood provided with same |
| CN105736469A (en) * | 2016-04-05 | 2016-07-06 | 珠海格力电器股份有限公司 | Fan, fan volute and air conditioner |
| CN106765388A (en) * | 2016-12-20 | 2017-05-31 | 美的集团股份有限公司 | Fume extractor |
| CN107062331A (en) * | 2017-04-11 | 2017-08-18 | 广东美的智美科技有限公司 | Fume extractor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855613A (en) * | 2021-01-19 | 2021-05-28 | 广州市永佳环保设备有限公司 | Noise-reduction centrifugal fan |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108105160B (en) | 2020-06-19 |
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