CN211778218U - Anti-surge fan and air conditioner - Google Patents
Anti-surge fan and air conditioner Download PDFInfo
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- CN211778218U CN211778218U CN201922408544.2U CN201922408544U CN211778218U CN 211778218 U CN211778218 U CN 211778218U CN 201922408544 U CN201922408544 U CN 201922408544U CN 211778218 U CN211778218 U CN 211778218U
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Abstract
The utility model provides an anti-surge fan and air conditioner, anti-surge fan include spiral case and impeller, the spiral case forms the air outlet, the spiral case inboard includes the volute tongue, the spiral case outside includes first arc part and a sharp portion that is 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 utility model relates to an air conditioning equipment field, concretely relates to anti-surge fan and 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.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one problem, the utility model provides a pair of anti-surge fan, including spiral case and impeller, the spiral case forms the air outlet, the spiral case inboard includes the volute tongue, the spiral case outside includes first arc part and a straight line portion that is 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.
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 impeller region opposite to the first arc-shaped part forms an airflow passing region, an included angle formed by the airflow speed direction of the impeller blade passing through the airflow passing region and the straight line part is an outlet attack angle beta,
wherein the maximum exit attack angle is: β is 40 ° ± 2 °.
When the outlet attack angle beta is controlled between 38 deg. and 42 deg., the internal turbulence can be reduced, and the vibration can be reduced.
Preferably, the outlet attack angle β is an included angle formed between a tangential direction of the impeller blade in the airflow passing region and the straight line portion.
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 beta 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 more 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, the outlet attack angle β is simulated, the area of the impeller 2 opposite to the first arc-shaped part 11 forms 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, the included angle is the outlet attack angle β,
wherein the maximum exit attack angle is: β is 40 ° ± 2 °.
When the outlet attack angle beta is controlled between 38 deg. and 42 deg., the internal turbulence can be reduced, and the vibration can be reduced.
As shown in fig. 2, the area enclosed by the dotted line in the figure is the airflow passing area 21, the airflow is driven by the impeller and controlled by the inner wall BC, the airflow moves outwards from the area between the two areas, at this time, the included angle between the airflow direction and the straight line portion 121BC 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 between the tangential direction of the blade of the impeller 21 in the airflow passing area 21 and the straight line portion 121.
The exit attack angle β can also be described as the angle between the tangential direction of the vanes of the impeller 21 and the portion of the straight portion 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 and β may be 40 °.
When w is 0.73 and beta 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, an included angle formed by the airflow speed direction of the impeller 2 blade passing through 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 is 40 ° ± 2 °.
(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, an included angle formed by the airflow speed direction of the impeller 2 blade passing through 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 is 40 ° ± 2 °.
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, an included angle formed by the airflow speed direction of the impeller 2 blade passing through the airflow passing area 21 and the straight line part 121 is an outlet attack angle β, wherein the maximum outlet attack angle is: beta is 40 degrees plus or minus 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 a 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 beta 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 of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention, and the scope of the present invention is defined by 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 of claim 1, wherein: the area of the impeller (2) opposite to the first arc-shaped part (11) forms an airflow passing area (21), an included angle formed by the airflow speed direction of the impeller (2) 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 beta,
wherein the maximum exit attack angle is: β is 40 ° ± 2 °.
4. The fan of claim 3, wherein: the outlet attack angle beta is an included angle formed by the tangential direction of the blades of the impeller (2) in the airflow passing area (21) and the straight line part (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 is 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 |
|---|---|---|---|
| CN201922408544.2U CN211778218U (en) | 2019-12-27 | 2019-12-27 | Anti-surge fan and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922408544.2U CN211778218U (en) | 2019-12-27 | 2019-12-27 | Anti-surge fan and air conditioner |
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| Publication Number | Publication Date |
|---|---|
| CN211778218U true CN211778218U (en) | 2020-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922408544.2U Active CN211778218U (en) | 2019-12-27 | 2019-12-27 | Anti-surge fan and air conditioner |
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| CN (1) | CN211778218U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111059082A (en) * | 2019-12-27 | 2020-04-24 | 宁波奥克斯电气股份有限公司 | Anti-surge fan and air conditioner |
| CN114688086A (en) * | 2020-12-28 | 2022-07-01 | 苏州三星电子有限公司 | Volute and air duct machine |
-
2019
- 2019-12-27 CN CN201922408544.2U patent/CN211778218U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111059082A (en) * | 2019-12-27 | 2020-04-24 | 宁波奥克斯电气股份有限公司 | Anti-surge fan and air conditioner |
| CN114688086A (en) * | 2020-12-28 | 2022-07-01 | 苏州三星电子有限公司 | Volute and air duct machine |
| CN114688086B (en) * | 2020-12-28 | 2024-06-07 | 苏州三星电子有限公司 | Volute and air pipe machine |
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