CN110185640A - Centrifugal blower, household electrical appliance - Google Patents
Centrifugal blower, household electrical appliance Download PDFInfo
- Publication number
- CN110185640A CN110185640A CN201910515600.4A CN201910515600A CN110185640A CN 110185640 A CN110185640 A CN 110185640A CN 201910515600 A CN201910515600 A CN 201910515600A CN 110185640 A CN110185640 A CN 110185640A
- Authority
- CN
- China
- Prior art keywords
- centrifugal blower
- fan blade
- section
- air duct
- tangential
- 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
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- 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
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
-
- 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 present invention provides a kind of centrifugal blower, household electrical appliance.The centrifugal blower, including spiral case, fan blade is installed in the spiral case inner cavity, the spiral case has volute tongue towards the fan blade side, the internal chamber wall body of the spiral case forms the air duct of the centrifugal blower, it is arbitrarily the first plane perpendicular to the plane definition of the fan blade axial direction, it is projected in first plane, the air duct forms air duct molded line, the air duct molded line includes arc section, the arc section extends along the direction of rotation of the fan blade from the volute tongue, and the arc section and the fan blade are concentric.A kind of centrifugal blower according to the present invention, household electrical appliance, can effectively promote the resistance ability of centrifugal blower, reduce the operation noise of centrifugal blower, promote properties of product.
Description
Technical field
The invention belongs to centrifugal blower technical fields, and in particular to a kind of centrifugal blower, household electrical appliance.
Background technique
Centrifugal blower is one of three kinds of main air duct components, and centrifugal blower has compared to axial flow blower and cross flow fan
There is the advantage that air quantity is bigger, air purifier, mobile air conditioner be widely used in, in dehumidifier based on this advantage centrifugal blower,
But the aerodynamic noise that its operation generates is also larger, therefore the operation noise that centrifugal blower how is effectively reduced becomes product
One important breakthrough point of performance boost proposes the present invention based on this.
Summary of the invention
Therefore, it the technical problem to be solved in the present invention is that providing a kind of centrifugal blower, household electrical appliance, can effectively be promoted
The resistance ability of centrifugal blower reduces the operation noise of centrifugal blower, promotes properties of product.
To solve the above-mentioned problems, the present invention provides a kind of centrifugal blower, including spiral case, is installed in the spiral case inner cavity
Fan blade, the spiral case have volute tongue towards the fan blade side, and the internal chamber wall body of the spiral case forms the centrifugal blower
Air duct, arbitrarily perpendicular to the plane definition of the fan blade axial direction be the first plane, projected in first plane, it is described
Air duct formed air duct molded line, the air duct molded line includes arc section, the arc section along the fan blade direction of rotation from
Extend at the volute tongue, and the arc section and the fan blade are concentric.
Preferably, round angle corresponding to the arc section be A, 15 °≤A≤20 °.
Preferably, the diameter of the arc section is D, and the maximum outside diameter of the fan blade is d, 8mm≤D-d≤20mm.
Preferably, the air duct has air outlet, projects in first plane, the air duct molded line further includes being in
The first tangential section, the second tangential section on the fan blade is tangential, the first tangential section and the second tangential section are parallel and described
First tangential section is greater than the described second tangential section at a distance from the fan blade at a distance from the axle center of the fan blade, in outlet air
On direction, the second tangential section is in the downstream of the described first tangential section, the first tangential section and the described second tangential section
Phase two close end between pass through changeover portion connect.
Preferably, the changeover portion be straightway, between the straightway and the first tangential section have included angle B, 15 °
≤B≤30°。
Preferably, the junction of the changeover portion and the described first tangential section is round and smooth camber line, and/or, the changeover portion
Junction with the described second tangential section is round and smooth camber line.
Preferably, the blade of the fan blade is forward-type blade.
The present invention also provides a kind of household electrical appliance, including above-mentioned centrifugal blower.
Preferably, the household electrical appliance are air purifier, air conditioner, any one in dehumidifier.
A kind of centrifugal blower provided by the invention, household electrical appliance, since the air duct molded line at the volute tongue includes circular arc
Section, and the arc section is arranged concentrically with the fan blade, by original volute tongue and fan blade distance, most nearby the point of position is improved
For the circular arc line being arranged concentrically of the invention, preferably air-flow can be guided, the effect for flying flow cone is played, significantly improve
The resistance ability in the air duct, the stability of air-flow is stronger, this also makes the operation noise of centrifugal blower obtain high degree
It reduces.
Detailed description of the invention
Fig. 1 is the structural decomposition diagram of the centrifugal blower of the embodiment of the present invention；
Fig. 2 is the schematic diagram of internal structure of the centrifugal blower in Fig. 1；
Fig. 3 is the structural schematic diagram of fan blade in Fig. 1.
Appended drawing reference indicates are as follows:
1, spiral case；11, volute tongue；12, air duct molded line；121, arc section；122, the first tangential section；123, the second tangential section；
124, changeover portion；13, air outlet；2, fan blade；21, blade；3, motor.
Specific embodiment
In conjunction with referring to shown in Fig. 1 to 3, according to an embodiment of the invention, a kind of centrifugal blower is provided, including spiral case 1, it is described
Fan blade 2 is installed in 1 inner cavity of spiral case, the fan blade 2 rotates under the driving of motor 3, and the spiral case 1 is towards the fan blade
2 sides are taken turns with volute tongue 11, the internal chamber wall body of the spiral case 1 forms the air duct of the centrifugal blower, arbitrarily perpendicular to the wind
The axial plane definition of impeller 2 is the first plane, is projected in first plane, and the air duct forms air duct molded line 12, institute
Stating air duct molded line 12 includes arc section 121, and the arc section 121 is along the direction of rotation of the fan blade 2 from the volute tongue 11
Place extends, and the arc section 121 and the fan blade 2 are concentric.In the technical solution, due to the air duct type at the volute tongue 11
Line 12 includes arc section 121, and the arc section 121 is arranged concentrically with the fan blade 2, by original volute tongue and fan blade away from
From most nearby the point of position is improved to the circular arc line being arranged concentrically of the invention, preferably air-flow can be guided, played
The effect for flying flow cone, significantly improves the resistance ability in the air duct, the stability of air-flow is stronger, this also makes the fortune of centrifugal blower
Row noise obtains the reduction of high degree.It is understood that arc section 121 above-mentioned is that one intercepted on same circle has
The arc segment of identical radius of curvature.
Further, round angle corresponding to the arc section 121 be A, 15 °≤A≤20 °, using the technical solution pair
The span of the arc section 121 is rationally limited, and the resistance ability of the centrifugal air duct can be further promoted, and increases air quantity
While further decrease operation noise.
Further, the diameter of the arc section 121 is D, and the maximum outside diameter of the fan blade 2 is d, 8mm≤D-d≤
20mm, namely the spacing between the arc section 121 and the fan blade 2 is rationally limited, prevent gap is too small from causing
Inadequate drainage, the excessive effect for leading to volute tongue in gap are unobvious.
In order to further decrease the operation noise of the centrifugal blower, it is preferable that the air duct has air outlet 13, in institute
State and projected in the first plane, the air duct molded line 12 further include in the fan blade 2 it is tangential on the first tangential section 122, the
Two tangential sections 123, the first tangential section 122 is parallel with the second tangential section 123, and the first tangential section 122 and the wind
The distance in the axle center of impeller 2 is greater than the described second tangential section 123 at a distance from the fan blade 2, on air-out direction, described the
Two tangential sections 123 are in the downstream of the described first tangential section 122, the first tangential section 122 and the described second tangential section 123
It is connected between phase two close end by changeover portion 124.In the technical solution, it can be understood as the air outlet 13 is variable cross-section knot
Structure, and be throat structure, and the throat structure then carries out the direction guidance of stream out of air-flow, energy using the changeover portion 124
It enough effectively prevent outlet air-flow to generate turbulent flow at the gas outlet 13 and then induces operation noise；Further, due to this
Gas outlet in technical solution is throat structure, forms throttling pressurization to outlet air-flow, this can lengthen outlet air-flow outside electric appliance
The overcurrent distance of side.Preferably, the changeover portion 124 is straightway, is had between the straightway and the first tangential section 122
There is an included angle B, 15 °≤B≤30 °.
Preferably, the junction of the changeover portion 124 and the described first tangential section 122 is round and smooth camber line, and/or, it is described
The junction of changeover portion 124 and the described second tangential section 123 is round and smooth camber line.By to the changeover portion in the technical solution
124 compare the round and smooth processing at place with the described first tangential section 122 or the second tangential section 123, can be obviously reduced due to molded line
It is mutated the resistance to outlet air air-flow.
In order to further enhance the air quantity of the centrifugal blower, it is preferable that the blade 21 of the fan blade 2 is forward-type leaf
Piece, forward-type blade herein as shown in figure 3, the end (axle center one end far from the fan blade 2) of fan blade 21 toward institute
State the downstream side of the direction of rotation of fan blade 2 namely the direction of the blade 21 and the direction of rotation one of the fan blade 2
It causes, more specifically, the tangential direction of the end extending direction of the fan blade 21 and the fan blade 2 is in the first plane upslide
Shadow forms angle C, 90 ° of 180 ° of < C <.
In order to sufficiently verify technical effect brought by technical solution of the present invention, determine that the diameter of fan blade 2 above-mentioned is
210mm, the diameter of the arc section 121 are 220mm, A=20 °, B=25 °, and C=130 °, and the centrifugal blower is installed in
In air purifier with multiple filtration net, runs the air purifier and test examination is carried out to its noise level and air quantity
It tests, obtains table 1, the data in table 2.
Table 1
Table 2
According to noise test experimental result table 1 it is found that having used the air purifier most low noise of centrifugal blower of the invention
Sound is 37.7dB, and the more existing minimum noise level of air purifier product reduces 2dB；
According to wind quantity test experimental result table 2 it is found that having used the air purifier of centrifugal blower of the invention, resistance energy
Power significantly improves, and when static pressure is less than 50Pa, installation and cancellation filter screen, air quantity is substantially unchanged, and resistance ability is good, air quantity
Height, and in the operation of identical operating condition, air quantity level is higher than existing product, and in the case where identical air quantity, noise is lower.
Centrifugal blower of the invention, which may be utilized for other, in the household electrical appliance of rigors air quantity and noise, example
Such as air conditioner especially moveable air conditioner, any one in dehumidifier.
Those skilled in the art will readily recognize that above-mentioned each advantageous manner can be free under the premise of not conflicting
Ground combination, superposition.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.Above only
It is the preferred embodiment of the present invention, it is noted that for those skilled in the art, do not departing from this hair
Under the premise of bright technical principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as guarantor of the invention
Protect range.
Claims (9)
1. a kind of centrifugal blower, including spiral case (1), it is installed with fan blade (2) in spiral case (1) inner cavity, spiral case (1) court
There are volute tongue (11) to the fan blade (2) side, which is characterized in that the internal chamber wall body of the spiral case (1) forms the centrifugation
The air duct of blower is arbitrarily the first plane perpendicular to the plane definition of the fan blade (2) axial direction, in the first plane upslide
Shadow, the air duct form air duct molded line (12), and the air duct molded line (12) includes arc section (121), arc section (121) edge
The direction of rotation of the fan blade (2) extend from the volute tongue (11), and the arc section (121) and the fan blade
(2) with one heart.
2. centrifugal blower according to claim 1, which is characterized in that round angle corresponding to the arc section (121) is
A, 15 °≤A≤20 °.
3. centrifugal blower according to claim 2, which is characterized in that the diameter of the arc section (121) is D, the wind
The maximum outside diameter of impeller (2) is d, 8mm≤D-d≤20mm.
4. centrifugal blower according to any one of claim 1 to 3, which is characterized in that the air duct has air outlet
(13), projected in first plane, the air duct molded line (12) further include in the fan blade (2) it is tangential on first
Tangential section (122), the second tangential section (123), the first tangential section (122) is parallel with second tangential section (123), and described the
One tangential section (122) is greater than the described second tangential section (123) and the fan blade at a distance from the axle center of the fan blade (2)
(2) distance, on air-out direction, the second tangential section (123) is in the downstream of the described first tangential section (122), described
It is connect between first tangential section (122) and the phase two close end of the described second tangential section (123) by changeover portion (124).
5. centrifugal blower according to claim 4, which is characterized in that the changeover portion (124) is straightway, the straight line
With included angle B between section and the first tangential section (122), 15 °≤B≤30 °.
6. centrifugal blower according to claim 5, which is characterized in that the changeover portion (124) and the described first tangential section
(122) junction is round and smooth camber line, and/or, the junction of the changeover portion (124) and the described second tangential section (123) is
Round and smooth camber line.
7. according to claim 1 to 3,5,6 described in any item centrifugal blowers, which is characterized in that the blade of the fan blade (2)
It (21) is forward-type blade.
8. a kind of household electrical appliance, including centrifugal blower, which is characterized in that the centrifugal blower is any one of claims 1 to 7
The centrifugal blower.
9. household electrical appliance according to claim 8, which is characterized in that the household electrical appliance be air purifier, air conditioner,
Any one in dehumidifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910515600.4A CN110185640B (en) | 2019-06-14 | 2019-06-14 | Centrifugal fan and household appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910515600.4A CN110185640B (en) | 2019-06-14 | 2019-06-14 | Centrifugal fan and household appliance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110185640A true CN110185640A (en) | 2019-08-30 |
| CN110185640B CN110185640B (en) | 2021-07-27 |
Family
ID=67721939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910515600.4A Active CN110185640B (en) | 2019-06-14 | 2019-06-14 | Centrifugal fan and household appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110185640B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110985439A (en) * | 2019-12-25 | 2020-04-10 | 宁波奥克斯电气股份有限公司 | Forward-bent impeller, centrifugal fan and air conditioner |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006233835A (en) * | 2005-02-24 | 2006-09-07 | Matsushita Electric Ind Co Ltd | Blower |
| US8591183B2 (en) * | 2007-06-14 | 2013-11-26 | Regal Beloit America, Inc. | Extended length cutoff blower |
| CN206478022U (en) * | 2017-01-04 | 2017-09-08 | 中山大洋电机股份有限公司 | A kind of exhaust fan |
-
2019
- 2019-06-14 CN CN201910515600.4A patent/CN110185640B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006233835A (en) * | 2005-02-24 | 2006-09-07 | Matsushita Electric Ind Co Ltd | Blower |
| US8591183B2 (en) * | 2007-06-14 | 2013-11-26 | Regal Beloit America, Inc. | Extended length cutoff blower |
| CN206478022U (en) * | 2017-01-04 | 2017-09-08 | 中山大洋电机股份有限公司 | A kind of exhaust fan |
Non-Patent Citations (1)
| Title |
|---|
| 丁可金: "蜗舌型式对离心通风机气动激励的影响分析", 《噪声与振动控制》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110985439A (en) * | 2019-12-25 | 2020-04-10 | 宁波奥克斯电气股份有限公司 | Forward-bent impeller, centrifugal fan and air conditioner |
| CN110985439B (en) * | 2019-12-25 | 2022-01-25 | 宁波奥克斯电气股份有限公司 | Forward-bent impeller, centrifugal fan and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110185640B (en) | 2021-07-27 |
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