CN111059082A - Anti-surge fan and air conditioner - Google Patents
Anti-surge fan and air conditioner Download PDFInfo
- Publication number
- CN111059082A CN111059082A CN201911383527.6A CN201911383527A CN111059082A CN 111059082 A CN111059082 A CN 111059082A CN 201911383527 A CN201911383527 A CN 201911383527A CN 111059082 A CN111059082 A CN 111059082A
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- Prior art keywords
- impeller
- fan
- volute
- surge
- arc
- 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.)
- Pending
Links
- 230000007704 transition Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Images
Classifications
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- 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
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- 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
- F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
- F04D17/04—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal of transverse-flow type
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- 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
- F04D29/422—Discharge tongues
-
- 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
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides an anti-surge fan which comprises a volute and an impeller, wherein the volute forms an air outlet, the inner side of the volute comprises a volute tongue, and the outer side of the volute comprises a first arc-shaped part and a straight line part close to the air outlet. The surge of the fan is mainly caused by the phenomenon of periodically generating vortex in the fan, the specific size of the volute is specifically designed in the technical scheme, and the surge can be obviously relieved due to the relative position and size of the volute and the impeller in the volute, so that the control of the airflow in the volute is restricted.
Description
Technical Field
The invention relates to the field of air conditioning equipment, in particular to an anti-surge fan and an air conditioner.
Background
The cross-flow fan is widely applied to indoor units of household air conditioners, and is positioned indoors for use, so that the noise control is very important, and the use experience of users can be influenced if the noise is too large. Surging occurs frequently in the trial-production stage of the indoor unit, and noise accompanying surging greatly affects the comfort of people. However, no design method and guidelines for preventing surge are available. Experimental research shows that the structures of the sections a and b of the volute of the cross-flow fan, the volute tongue spacing c and the like have obvious influence on the intensity of fan surge.
Disclosure of Invention
In order to solve at least one of the above problems, the present invention provides an anti-surge fan, including a volute and an impeller, wherein the volute forms an air outlet, the inner side of the volute includes a volute tongue, and the outer side of the volute includes a first arc-shaped portion and a straight portion near the air outlet.
The surge of the fan is mainly caused by the phenomenon of periodically generating vortex in the fan, the specific size of the volute is specifically designed in the technical scheme, and the surge can be obviously relieved due to the relative position and size of the volute and the impeller in the volute, so that the control of the airflow in the volute is restricted.
Preferably, the first arcuate section and the linear section are connected by a junction point, the ratio w of the difference y between the distance L from the centre of the impeller and the radius R of the impeller to the radius R of the impeller being between 0.68 and 0.78, i.e. the first arcuate section and the linear section are connected by a junction point
w is 0.73 + -0.05, wherein y is L-R.
When the w value is controlled between 0.68 and 0.78, the internal turbulence can be reduced, and the vibration can be reduced.
Preferably, the area of the impeller opposite to the first arc-shaped part forms an airflow passing area, the flow velocity direction of the airflow passing through the impeller blade at the airflow passing area forms an included angle with the straight line part, the included angle is an outlet attack angle β,
wherein the maximum exit angle of attack is β -40 ° ± 2 °.
When the outlet angle of attack β is controlled to be between 38 ° and 42 °, internal turbulence is reduced and vibration is reduced.
Preferably, the outlet attack angle β is an angle formed by the tangential direction of the impeller blade in the airflow passing area and the straight line part.
Preferably, the vertical distance C between the inner wall of the volute tongue and the outer edge of the impeller is equal to 3.1mm-3.5 mm.
Preferably, the volute tongue is connected with the air outlet through a second arc-shaped part. Connecting them by the second arcuate portion at this point allows the transition to be smoother, reducing the degree of turbulence.
Preferably, w is 0.73.
Preferably β is 40 °.
When w is 0.73 and β is 40 deg., the turbulence is lowest, and the vibration is reduced to the maximum extent.
Preferably, the cross section of the air outlet (12) increases along the airflow flowing direction. Because the air pressure in the air outlet is higher, in order to enable the device to convey the air flow to a farther place and enable the temperature in the space to be more uniform, the air outlet is arranged to be increased along the air flow flowing direction, the air flow speed is increased at the moment, and the air flow is conveyed to a farther position.
The application also provides an air conditioner, which comprises the fan in any one of the technical schemes.
Drawings
FIG. 1 is a schematic view of a first arcuate portion and the linear portion and engagement point;
FIG. 2 is a schematic view of the exit attack angle β;
FIG. 3 is a schematic view showing the vertical distance from the inner wall of the volute tongue to the outer edge of the impeller.
Description of reference numerals:
the spiral casing 1, the first arc-shaped part 11, the air outlet 12, the connecting point 13 and the straight line part 121
A volute tongue 14, a second arc-shaped part 15;
impeller 2, gas flow through zone 21.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the first embodiment, an anti-surge fan is provided, which includes a volute 1 and an impeller 2, the volute 1 forms an air outlet 12, the inside of the volute 1 includes a volute tongue 14, and is characterized in that: the outer side of the volute 1 comprises a first arc-shaped part 11 and a straight part 121 close to the air outlet 12. The surge of the fan is mainly caused by the phenomenon of periodically generating vortex in the fan, the specific size of the volute is specifically designed in the technical scheme, and the surge can be obviously relieved due to the relative position and size of the volute and the impeller in the volute, so that the control of the airflow in the volute is restricted.
On the basis of the above embodiment, the first arc-shaped part 11 and the straight line part 121 are connected by a joint point 13, and the ratio w of the difference y between the distance L from the center of the impeller 2 at the joint point 13 and the radius R of the impeller 2 to the radius R of the impeller 2 is between 0.68 and 0.78, that is, the ratio w is
w is 0.73 + -0.05, wherein y is L-R.
When the w value is controlled between 0.68 and 0.78, the internal turbulence can be reduced, and the vibration can be reduced.
As shown in fig. 1, the first arc part 11 is an arc part at AB, the straight line part 121 is a part shown as BC in the figure, the joint point 13 is point B, the impeller center is point O, wherein L is the distance from point B to point O, i.e., the length of BO, the difference between the length of BO and the impeller radius R is y, and when the ratio of y to R is between 0.68 and 0.78, the turbulence is the lowest, and the surge is reduced.
In another embodiment, simulating outlet attack angle β, the area of impeller 2 opposite the first arcuate section 11 forms an airflow passing region 21, the direction of airflow velocity through the blades of impeller 2 at region 21 forms an angle with the straight section 121 that is outlet attack angle β,
wherein the maximum exit angle of attack is β -40 ° ± 2 °.
When the outlet angle of attack β is controlled to be between 38 ° and 42 °, internal turbulence is reduced and vibration is reduced.
As shown in fig. 2, the area enclosed by the dashed line in the figure is the air flow passing area 21, the air flow is driven by the impeller and controlled by the inner wall BC, the air flow moves outwards from the area between the two areas, the included angle between the air flow direction and the straight line portion 121BC at this time is the outlet attack angle β, the outlet attack angle β is controlled to be 38 ° to 42 °, the turbulence degree is reduced, and the surge is reduced to the maximum degree.
On the basis of the above technical solution, the outlet attack angle β is an included angle formed by the tangential direction of the blade of the impeller 21 in the airflow passing area 21 and the straight line part 121.
The exit attack angle β can also be described as the angle between the tangent to the blades of the impeller 21 and the portion of the straight section 121 BC.
As can be seen from the simulation, the vertical distance C between the inner wall of the volute tongue 14 and the outer edge of the impeller 2 is equal to 3.1mm-3.5 mm.
As shown in fig. 3, the distance at the inner wall of the volute 14 and the impeller closest thereto also affects the turbulence generation, and by simulating that setting this spacing C to a certain distance can reduce the turbulence and reduce surge to the greatest extent.
In addition, the volute tongue 14 is connected with the air outlet 12 through a second arc-shaped part 15. Connecting them by the second arcuate portion at this point allows the transition to be smoother, reducing the degree of turbulence.
In a specific embodiment, w may be 0.73, β may be 40 °.
When w is 0.73 and β is 40 deg., the turbulence is lowest, and the vibration is reduced to the maximum extent.
According to the specific parameter control given in the above embodiments, different forms of controlling surge can be obtained according to different combinations of specific parameters:
(1) an anti-surge fan, wherein a volute of the anti-surge fan has the following parameters:
the first arc-shaped part 11 and the straight part 121 are connected by a junction 13, and the ratio w of the difference y between the distance L from the center of the impeller 2 at the junction 13 and the radius R of the impeller 2 to the radius R of the impeller 2 is between 0.68 and 0.78, i.e. the ratio w between the radius R of the impeller 2 and the distance L is between 0.68 and 0.78
w is 0.73 + -0.05, wherein y is L-R.
Meanwhile, the area of the impeller 2 opposite to the first arc-shaped part 11 forms an airflow passing area 21, the included angle formed by the flow speed direction of the airflow passing through the blades of the impeller 2 at the airflow passing area 21 and the straight line part 121 is an outlet attack angle β, wherein the maximum outlet attack angle is β which is 40 degrees +/-2 degrees.
(2) An anti-surge fan, wherein a volute of the anti-surge fan has the following parameters:
the first arc-shaped part 11 and the straight part 121 are connected by a junction 13, and the ratio w of the difference y between the distance L from the center of the impeller 2 at the junction 13 and the radius R of the impeller 2 to the radius R of the impeller 2 is between 0.68 and 0.78, i.e. the ratio w between the radius R of the impeller 2 and the distance L is between 0.68 and 0.78
w is 0.73 + -0.05, wherein y is L-R.
Meanwhile, the vertical distance C from the inner wall of the volute tongue 14 to the outer edge of the impeller 2 is equal to 3.1 mm.
(3) An anti-surge fan, wherein a volute of the anti-surge fan has the following parameters:
the area of the impeller 2 opposite to the first arc-shaped part 11 forms an airflow passing area 21, the included angle formed by the flow speed direction of the airflow passing through the blades of the impeller 2 at the airflow passing area 21 and the straight line part 121 is an outlet attack angle β, wherein the maximum outlet attack angle is β which is 40 degrees +/-2 degrees.
Meanwhile, the vertical distance C from the inner wall of the volute tongue 14 to the outer edge of the impeller 2 is equal to 3.1 mm.
(4) An anti-surge fan, wherein a volute of the anti-surge fan has the following parameters:
the first arc-shaped part 11 and the straight part 121 are connected by a junction 13, and the ratio w of the difference y between the distance L from the center of the impeller 2 at the junction 13 and the radius R of the impeller 2 to the radius R of the impeller 2 is between 0.68 and 0.78, i.e. the ratio w between the radius R of the impeller 2 and the distance L is between 0.68 and 0.78
w is 0.73 + -0.05, wherein y is L-R.
Meanwhile, the area of the impeller 2 opposite to the first arc-shaped part 11 forms an airflow passing area 21, the included angle formed by the airflow speed direction passing through the blades of the impeller 2 at the airflow passing area 21 and the straight line part 121 is an outlet attack angle β, wherein the maximum outlet attack angle is β ═ 40 degrees +/-2 degrees
The vertical distance C from the inner wall of the volute tongue 14 to the outer edge of the impeller 2 is equal to 3.1 mm.
The anti-surge fan with the specific parameters adopts a specific embodiment that the ratio w of the difference value y between the distance L from the connecting point 13 to the center of the impeller 2 and the radius R of the impeller 2 to the radius R of the impeller 2, the outlet attack angle β and the vertical distance from the inner wall of the volute tongue 14 to the outer edge of the impeller 2 are combined in pairs, and the anti-surge fan simultaneously accords with the three parameters.
In practical use, only one parameter can be changed in an anti-surge fan according to actual conditions so as to reduce cost.
In order to make it possible for the anti-surge fan to convey the internal airflow further away, the cross section of the outlet 12 increases in the direction of airflow. Because the air pressure in the air outlet is higher, in order to enable the device to convey the air flow to a farther place and enable the temperature in the space to be more uniform, the air outlet is arranged to be increased along the air flow flowing direction, the air flow speed is increased at the moment, and the air flow is conveyed to a farther position.
The application also provides an air conditioner, which comprises the fan in any one of the technical schemes.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. An anti-surge fan, includes spiral case (1) and impeller (2), spiral case (1) forms air outlet (12), spiral case (1) inboard includes volute tongue (14), its characterized in that: the outer side of the volute (1) comprises a first arc-shaped part (11) and a straight line part (121) close to the air outlet (12).
2. The fan of claim 1, wherein: the first arc-shaped part (11) and the straight line part (121) are connected by a joint point (13), and the ratio w of the difference y between the distance L from the center of the impeller (2) at the joint point (13) and the radius R of the impeller (2) to the radius R of the impeller (2) is between 0.68 and 0.78, namely
w is 0.73 + -0.05, wherein y is L-R.
3. The fan according to claim 1, wherein the area of the impeller (2) opposite to the first arc-shaped part (11) constitutes an airflow passing area (21), the flow velocity direction of the airflow passing through the blades of the impeller (2) at the airflow passing area (21) forms an included angle with the straight line part (121) which is an outlet attack angle β,
wherein the maximum exit angle of attack is β -40 ° ± 2 °.
4. The fan according to claim 3, wherein the outlet attack angle β is an angle formed by a tangential direction of a blade of the impeller (21) of the air flow passing region (21) and the straight line portion (121).
5. The fan of claim 1, wherein: the vertical distance C from the inner wall of the volute tongue (14) to the outer edge of the impeller (2) is equal to 3.1mm-3.5 mm.
6. The fan of claim 5, wherein: the volute tongue (14) is connected with the air outlet (12) through a second arc-shaped part (15).
7. The fan of claim 2, wherein: w is 0.73.
8. The fan of claim 3 wherein β -40 °.
9. The fan of claim 2, wherein: the cross section of the air outlet (12) is increased along the airflow flowing direction.
10. An air conditioner, characterized in that: comprising a fan according to any of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911383527.6A CN111059082A (en) | 2019-12-27 | 2019-12-27 | Anti-surge fan and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911383527.6A CN111059082A (en) | 2019-12-27 | 2019-12-27 | Anti-surge fan and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111059082A true CN111059082A (en) | 2020-04-24 |
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ID=70304304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911383527.6A Pending CN111059082A (en) | 2019-12-27 | 2019-12-27 | Anti-surge fan and air conditioner |
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| Country | Link |
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| CN (1) | CN111059082A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201368039Y (en) * | 2009-03-16 | 2009-12-23 | 江苏中联风能机械有限公司 | Efficient anti-surging axial flow fan |
| CN104373390A (en) * | 2014-10-29 | 2015-02-25 | 珠海格力电器股份有限公司 | Flow collector used for air flow guiding, volute assembly, centrifugal fan and air conditioner |
| CN104411981A (en) * | 2012-07-13 | 2015-03-11 | 德尔福汽车***卢森堡有限公司 | Ventilation device equipped with a casing shaped as a volute housing |
| CN204851788U (en) * | 2015-08-04 | 2015-12-09 | 珠海格力电器股份有限公司 | Snail tongue, spiral case that has this snail tongue and through -flow fan |
| CN106050700A (en) * | 2016-07-19 | 2016-10-26 | 东莞市宏铭通风设备有限公司 | Noiseless fan structure |
| CN211778218U (en) * | 2019-12-27 | 2020-10-27 | 宁波奥克斯电气股份有限公司 | Anti-surge fan and air conditioner |
-
2019
- 2019-12-27 CN CN201911383527.6A patent/CN111059082A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201368039Y (en) * | 2009-03-16 | 2009-12-23 | 江苏中联风能机械有限公司 | Efficient anti-surging axial flow fan |
| CN104411981A (en) * | 2012-07-13 | 2015-03-11 | 德尔福汽车***卢森堡有限公司 | Ventilation device equipped with a casing shaped as a volute housing |
| US20150204337A1 (en) * | 2012-07-13 | 2015-07-23 | Delphi Automotive Systems Luxembourg Sa | Ventilation device provided with a volute-shaped casing |
| CN104373390A (en) * | 2014-10-29 | 2015-02-25 | 珠海格力电器股份有限公司 | Flow collector used for air flow guiding, volute assembly, centrifugal fan and air conditioner |
| CN204851788U (en) * | 2015-08-04 | 2015-12-09 | 珠海格力电器股份有限公司 | Snail tongue, spiral case that has this snail tongue and through -flow fan |
| CN106050700A (en) * | 2016-07-19 | 2016-10-26 | 东莞市宏铭通风设备有限公司 | Noiseless fan structure |
| CN211778218U (en) * | 2019-12-27 | 2020-10-27 | 宁波奥克斯电气股份有限公司 | Anti-surge fan and air conditioner |
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