CN112303023A - Volute structure and fan - Google Patents
Volute structure and fan Download PDFInfo
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- CN112303023A CN112303023A CN202011270802.6A CN202011270802A CN112303023A CN 112303023 A CN112303023 A CN 112303023A CN 202011270802 A CN202011270802 A CN 202011270802A CN 112303023 A CN112303023 A CN 112303023A
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- straight line
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- 230000001174 ascending effect Effects 0.000 claims description 21
- 238000009792 diffusion process Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 238000009826 distribution Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 230000005855 radiation Effects 0.000 abstract description 3
- 230000000035 biogenic effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 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
- F04D29/4233—Fan casings with volutes extending mainly in axial or radially inward direction
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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
- F04D29/66—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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a volute structure and a fan. The volute structure comprises a body, the body comprises a first side plate and a second side plate which are opposite, a guide plate is arranged between the first side plate and the second side plate, the cross section of the guide plate comprises at least two wavy line units, and all the wavy line units are connected in sequence. According to the volute structure and the fan, the molded lines are designed in a mode of mutually connecting multiple sections of circular arcs and straight lines, the internal flow efficiency of the volute is effectively improved, the air volume is increased, the pneumatic noise and the power consumption generated by high-speed operation of the fan are reduced, the axial flow distribution characteristic of the volute can be improved by arranging the wavy units, the flow is more uniform and smooth, especially, the volute tongue is wavy, the radius and the clearance of the volute tongue are changed alternately, and the sound pressure superposition effect, the biogenic radiation power and the efficiency at the volute tongue are further improved.
Description
Technical Field
The invention relates to the technical field of fan equipment, in particular to a volute structure and a fan.
Background
The molded line of the inner wall of the volute is designed according to the potential vortex theory, namely, under the action of potential mass force, the airflow does non-rotational flow along the rotation center without additional energy injection, and simultaneously, the product of the circumferential flow velocity of the airflow and the distance of the rotation center is constant. According to the potential vortex theory, and assuming that the flow of a certain section of the volute is in direct proportion to the included angle formed by the section and the initial section of the volute, the hydraulic molded line of the volute can be deduced to be a logarithmic spiral line, and the specific drawing rule is divided into an equilateral base drawing method and a non-equilateral base drawing method for the convenience of drawing and the simplification of the logarithmic spiral line; in addition, in the field of air conditioners, for reasons of simple and efficient manufacturing process and convenient assembly, the centrifugal volute for the air conditioner is generally designed by adopting a rectangular volute, however, in the field of the air conditioner, the structural size limitation of an indoor unit is strict, the volute molded line design theory cannot be well applied, corresponding deformation design must be carried out, and volute molded lines designed according to the potential vortex theory belong to a unitary design theory, namely a two-dimensional plane design category, and do not conform to real complex three-dimensional flow in the volute, so that the problem of high pneumatic noise of the centrifugal volute for the air conditioner is caused.
Disclosure of Invention
In order to solve the technical problem of high aerodynamic noise of the volute shape in the prior art, the volute structure and the fan are provided, wherein the flow guide surface of the volute is arranged into a wave shape, and the volute profile is designed by interconnecting a straight line end and an arc segment to effectively improve the air volume and reduce the noise.
The utility model provides a volute structure, includes the body, the body includes relative first curb plate and second curb plate, first curb plate with be provided with the guide plate between the second curb plate, the cross-section of guide plate includes two at least wave line units, and all wave line units connect gradually.
The wavy line unit comprises an ascending straight line section and a descending straight line section, the ascending straight line section and the descending straight line section are connected at the highest point of the wavy line unit, and an included angle alpha is formed between the ascending straight line section and the connecting line of the two ends of the wavy line unit.
The number of the wavy line units is N, and N is more than or equal to 2;
when N is 2 and the lengths of all the wavy line units are equal:
when the length of the ascending straight line section and the length of the descending straight line section in the same wavy line unit are equal, the angle of alpha ranges from 3 degrees to 30 degrees;
when the length of the ascending straight line section and the length of the descending straight line section in the same wavy line unit are not equal, the angle of a ranges from 5 degrees to 60 degrees;
when N is 2, and the lengths of all the wavy line units are unequal:
when the length of the ascending straight line section and the length of the descending straight line section in the same wavy line unit are equal, the angle of alpha ranges from 5 degrees to 65 degrees;
when the length of the ascending straight line section and the length of the descending straight line section in the same wavy line unit are not equal, the angle of alpha ranges from 8 degrees to 28 degrees;
when N is more than 2 and the lengths of all the wavy line units are equal, the angle alpha ranges from 10 degrees to 70 degrees;
when N is greater than 2 and the lengths of all the wavy line units are unequal, the angle alpha ranges from 5 degrees to 65 degrees.
The inner wall molded lines of the body comprise a straight line segment AB, an arc segment BC, an arc segment CD, a straight line segment DE, an arc segment EF, an arc segment FG, an arc segment GH, an arc segment HI, an arc segment IJ and a straight line segment JK which are connected in sequence, adjacent straight line segments and arc segments or adjacent arc segments and arc segments are tangent at intersection points, and a point A and a point K are located at an air outlet of the body.
The arc segment BC forms a volute tongue of the body.
The extension line of the circular arc section CD is tangent to the extension line of the circular arc section EF.
The impeller is arranged in the body, the straight line section DE is located below the impeller, and the length of the straight line section DE is less than or equal to 0.6 time of the diameter of the impeller.
The impeller is arranged in the body, and the curvature radius of the circular arc section BC ranges from 0.03 time to 0.155 time of the diameter of the impeller.
The impeller is arranged in the body, and the range of the volute tongue clearance of the body is 0.05 to 0.132 times of the diameter of the impeller.
An impeller is arranged in the body, a minimum distance L1 is formed between the J end of the straight line section JK and the A end of the impeller, a minimum distance L2 is formed between the K end of the straight line section JK and the A end of the straight line section AB, and the ratio of L1 to L2 ranges from 2 to 2.7.
The specific value range of the diffusion ratio from the E end to the F end of the circular arc section EF is 1.5-2; or the ratio of the diffusion ratio from the H end to the I end of the arc section HI ranges from 0.9 to 1; or the ratio of the diffusion ratio from the F end to the G end of the arc section FG ranges from 1.1 to 1.2.
When the straight line segment DE is parallel to the horizontal plane, the included angle formed by the straight line segment JK and the horizontal plane is 8-15 degrees.
A fan comprises the volute structure.
According to the volute structure and the fan, the wavy units are arranged, so that the axial flow distribution characteristic of the volute can be improved, the flow is more uniform and smooth, particularly, the volute tongue is wavy, the radius of the volute tongue and the clearance of the volute tongue are changed alternately, the sound pressure superposition effect at the volute tongue and the biogenic radiation power and efficiency are further improved, the air volume can be effectively improved and the noise can be reduced under the same fan structure size parameter, the molded line is designed in a mode of interconnecting a plurality of sections of circular arcs and straight lines, the internal flow efficiency of the volute is effectively improved, the air volume is increased, and the pneumatic noise and power consumption generated by high-speed operation of the fan are reduced; under the same flow, the fan layout space which is more severe or the structural design parameters of the fan which are more extreme can be matched, and the same wind noise level is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a volute structure and a blower according to an embodiment of the present invention;
FIG. 2 is another schematic structural diagram of a volute structure and a volute structure of a fan according to an embodiment of the present invention;
FIG. 3 is a schematic view of a volute structure and a profile of the volute structure according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a cross-section of a volute structure and a baffle of a fan according to an embodiment of the invention;
in the figure:
1. a body; 2. an impeller; 11. a first side plate; 12. a second side plate; 13. a baffle; 3. a wavy line unit; 31. lifting the straight line segment; 32. the straight line segment is lowered.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
When the centrifugal fan operates, airflow is non-uniformly distributed along the axial direction of the volute, the airflow is concentrated near the middle position of the volute, the two sides of the volute are relatively dispersed, the two sides of the volute are near the front disc of the impeller 2, and the vortex area is concentrated. The axial design or optimization of the volute molded line is realized, and the feasibility of further improving the inner flow characteristic of the volute and improving the aerodynamic efficiency of the fan is realized. However, it should be noted that the central position of the volute has a concentrated airflow, which is not equivalent to making the middle chamber of the volute larger to adapt to the flow characteristics of the volute. The volute structure shown in fig. 1 to 4 comprises a body 1, the body 1 comprises a first side plate 11 and a second side plate 12 which are opposite, a guide plate 13 is arranged between the first side plate 11 and the second side plate 12, the cross section of the guide plate 13 comprises at least two wavy line units 3, all the wavy line units 3 are connected in sequence, namely the cross section of the guide plate 13 on a plane perpendicular to the axis of the impeller 2 is the inner wall molded line of the body 1, the cross section of the guide plate 13 on the plane of the axis of the impeller 2 is formed by sequentially connecting at least two wavy units, wherein the protruding direction of the wavy unit faces the outside of the body 1, according to CFD simulation calculation, when the upper edge of the volute is in an M shape and the volute tongue is in a W shape (the technical scheme of the application), compared with the upper edge of the volute in the W shape and the volute tongue in the M shape, the air quantity is larger, the flow loss is smaller, and meanwhile, the volute tongue is synchronously wavy, so that the radius r of the volute tongue and the clearance t of the volute tongue are changed alternately in corresponding sizes along the axial direction. The sound pressure superposition effect at the volute tongue and the sound source radiation power and efficiency of the sound pressure superposition effect are further improved by the variable-diameter volute tongue and the variable-volute tongue gap, the maximum positions of the section molded lines are located at the axes of 1/4 and 3/4, and the maximum normal flow speed of the volute is located at 1/2. The axial flow is remodulated and distributed through the shape of the volute, the distribution characteristic of the axial flow is improved, the air volume is improved, and the efficiency is improved.
The wavy line unit 3 comprises an ascending straight line segment 31 and a descending straight line segment 32, the ascending straight line segment 31 and the descending straight line segment 32 are connected at the highest point of the wavy line unit 3, an included angle alpha is formed between the ascending straight line segment 31 and a connecting line of two ends of the wavy line unit 3, and each wavy unit is zigzag.
The number of the wavy line units 3 is N, and N is more than or equal to 2;
when N is 2 and the lengths of all the wavy line units 3 are equal (the length e1 of the wavy line unit 3 is one half of the corresponding dimension f of the cross section of the deflector 13):
when the length of the ascending straight line segment 31 and the length of the descending straight line segment 32 in the same wavy line unit 3 are equal (d 1-dn-0.5 e1), the angle α ranges from 3 ° to 30 °;
when the length of the ascending straight line segment 31 and the length of the descending straight line segment 32 in the same wavy line unit 3 are not equal (d1 ═ dn ≠ 0.5e1), the angle of α ranges from 5 ° to 60 °, where dn ranges from 0.1en to 0.9 en;
when N is 2 and the lengths of all the wavy line units 3 are not equal (en ≠ e1), the joint of the two wavy line units 3 and the central disc position of the impeller 2 are located in the same plane, where en ranges from 0.3f to 0.7f, e1 ranges from 0.3f to 0.7 f:
when the length of the ascending straight line segment 31 and the length of the descending straight line segment 32 in the same wavy line unit 3 are equal, the angle α ranges from 5 ° to 65 °;
when the length of the ascending straight line segment 31 and the length of the descending straight line segment 32 in the same wavy line unit 3 are not equal, the angle α ranges from 8 ° to 28 °;
when N > 2 and the lengths of all the wavy line units 3 are equal (en ═ e1 ═ e2 ═ f/N), in particular when dn ═ 0.5en, the angle α ranges from 10 ° to 70 °;
when N is more than 2 and the lengths of all the wavy line units 3 are unequal, the angle range of alpha is 5-65 degrees, wherein the value range of dn is 0.1-0.9 en.
The inner wall molded line of the body 1 comprises a straight line section AB, an arc section BC, an arc section CD, a straight line section DE, an arc section EF, an arc section FG, an arc section GH, an arc section HI, an arc section IJ and a straight line section JK which are connected in sequence, adjacent straight line sections and arc sections or adjacent arc sections and arc sections are tangent at the intersection point, and the point A and the point K are positioned at the air outlet of the body 1, namely the inner wall molded line of the body 1 is a continuous line from the point A to the point K, the point A is the corresponding point of the lower edge of the air outlet of the body 1, the point K is the corresponding point of the upper edge of the air outlet of the body 1, the problem that an Archimedes spiral line adopted in the prior art cannot adapt to an indoor unit with higher space limitation is solved, the axial airflow distribution characteristic of the fan can be effectively improved, the internal flow efficiency of the volute is improved, the air volume is increased, and the pneumatic noise and the power consumption generated by high-speed operation of the fan are reduced.
The arc segment BC forms a volute tongue of the body 1, that is, the center of the arc segment BC is located on the outer side of the body 1.
The extension line of the circular arc section CD is tangent to the extension line of the circular arc section EF, wherein the tangent point is located on one side of the straight line section DE away from the inside of the body 1, so that the airflow flowing through the circular arc section CD and the circular arc section EF changes in flow direction as little as possible, and the internal flow efficiency of the volute is improved.
The impeller 2 is arranged in the body 1, the straight line section DE is located below the impeller 2, the length of the straight line section DE is smaller than or equal to 0.6 time of the diameter of the impeller 2, and preferably, the middle point of the straight line section DE and the axis of the impeller 2 are located in the same vertical plane.
An impeller 2 is arranged in the body 1, and the curvature radius r of the circular arc segment BC ranges from 0.03 time to 0.155 time of the diameter of the impeller 2.
The impeller 2 is arranged in the body 1, and the range of the volute tongue clearance t of the body 1 is 0.05 to 0.132 times of the diameter of the impeller 2.
An impeller 2 is arranged in the body 1, a minimum distance L1 is formed between the J end of the straight line segment JK and the impeller 2, a minimum distance L2 is formed between the K end of the straight line segment JK and the A end of the straight line segment AB, and the ratio of L1 to L2 ranges from 2 to 2.7.
The specific value range of the diffusion ratio from the E end to the F end of the circular arc section EF is 1.5-2; or the ratio of the diffusion ratio from the H end to the I end of the arc section HI ranges from 0.9 to 1; or the ratio of the expansion ratio of the F end to the G end of the arc segment FG ranges from 1.1 to 1.2, where the expansion ratio is the ratio of the distance between the first end of the line segment and the base circle to the distance between the second end of the line segment and the base circle, and for example, the expansion ratio of the arc segment EF is the ratio b/a between the minimum distance b from the E end to the base circle and the minimum distance a from the F end to the base circle, which is 1.5-2.
When the straight line segment DE is parallel to the horizontal plane, the included angle formed by the straight line segment JK and the horizontal plane is 8-15 degrees.
The volute structure is applied to the field of air conditioners, and is particularly applied to a matched volute of a double-suction multi-wing centrifugal fan.
The fan comprises the volute structure, and preferably, the fan is a double-suction multi-wing centrifugal fan.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (13)
1. A volute structure, comprising: the corrugated steel wire rope comprises a body (1), wherein the body (1) comprises a first side plate (11) and a second side plate (12) which are opposite to each other, a guide plate (13) is arranged between the first side plate (11) and the second side plate (12), the cross section of the guide plate (13) comprises at least two corrugated wire units (3), and all the corrugated wire units (3) are sequentially connected.
2. The volute structure of claim 1, wherein: the wavy line unit (3) comprises an ascending straight line section (31) and a descending straight line section (32), the ascending straight line section (31) and the descending straight line section (32) are connected at the highest point of the wavy line unit (3), and an included angle alpha is formed between the ascending straight line section (31) and a connecting line of two ends of the wavy line unit (3).
3. The volute structure of claim 2, wherein: the number of the wavy line units (3) is N, and N is more than or equal to 2;
when N is 2 and the lengths of all the wavy line units (3) are equal:
when the length of the ascending straight line segment (31) and the length of the descending straight line segment (32) in the same wavy line unit (3) are equal, the angle of alpha ranges from 3 degrees to 30 degrees;
when the length of the ascending straight line segment (31) and the length of the descending straight line segment (32) in the same wavy line unit (3) are not equal, the angle of alpha ranges from 5 degrees to 60 degrees;
when N is 2, and the lengths of all the wavy line units (3) are not equal:
when the length of the ascending straight line segment (31) and the length of the descending straight line segment (32) in the same wavy line unit (3) are equal, the angle of alpha ranges from 5 degrees to 65 degrees;
when the length of the ascending straight line segment (31) and the length of the descending straight line segment (32) in the same wavy line unit (3) are not equal, the angle of alpha ranges from 8 degrees to 28 degrees;
when N is more than 2 and the lengths of all the wavy line units (3) are equal, the angle alpha ranges from 10 degrees to 70 degrees;
when N is larger than 2 and the lengths of all the wavy line units (3) are unequal, the angle alpha ranges from 5 degrees to 65 degrees.
4. The volute structure of claim 1, wherein: the inner wall molded lines of the body (1) comprise a straight line segment AB, an arc segment BC, an arc segment CD, a straight line segment DE, an arc segment EF, an arc segment FG, an arc segment GH, an arc segment HI, an arc segment IJ and a straight line segment JK which are connected in sequence, adjacent straight line segments and arc segments or adjacent arc segments and arc segments are tangent at intersection points, and a point A and a point K are located at an air outlet of the body (1).
5. The volute structure of claim 4, wherein: the arc segment BC forms a volute tongue of the body (1).
6. The volute structure of claim 4, wherein: the extension line of the circular arc section CD is tangent to the extension line of the circular arc section EF.
7. The volute structure of claim 4, wherein: an impeller (2) is arranged in the body (1), the straight line section DE is located below the impeller (2), and the length of the straight line section DE is less than or equal to 0.6 time of the diameter of the impeller (2).
8. The volute structure of claim 4, wherein: an impeller (2) is arranged in the body (1), and the curvature radius of the circular arc segment BC is 0.03-0.155 times of the diameter of the impeller (2).
9. The volute structure of claim 4, wherein: the impeller (2) is arranged in the body (1), and the range of the volute tongue clearance of the body (1) is 0.05 to 0.132 times of the diameter of the impeller (2).
10. The volute structure of claim 4, wherein: an impeller (2) is arranged in the body (1), a minimum distance L1 is formed between the J end of the straight line section JK and the impeller (2), a minimum distance L2 is formed between the K end of the straight line section JK and the A end of the straight line section AB, and the ratio range of L1 to L2 is 2-2.7.
11. The volute structure of claim 4, wherein: the specific value range of the diffusion ratio from the E end to the F end of the circular arc section EF is 1.5-2; or the ratio of the diffusion ratio from the H end to the I end of the arc section HI ranges from 0.9 to 1; or the ratio of the diffusion ratio from the F end to the G end of the arc section FG ranges from 1.1 to 1.2.
12. The volute structure of claim 4, wherein: when the straight line segment DE is parallel to the horizontal plane, the included angle formed by the straight line segment JK and the horizontal plane is 8-15 degrees.
13. A fan, its characterized in that: comprising the volute structure of any of claims 1 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011270802.6A CN112303023A (en) | 2020-11-13 | 2020-11-13 | Volute structure and fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011270802.6A CN112303023A (en) | 2020-11-13 | 2020-11-13 | Volute structure and fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112303023A true CN112303023A (en) | 2021-02-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011270802.6A Pending CN112303023A (en) | 2020-11-13 | 2020-11-13 | Volute structure and fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112303023A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114658689A (en) * | 2022-03-17 | 2022-06-24 | 哈尔滨工业大学 | Volute and centrifugal compressor |
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| US20170058914A1 (en) * | 2015-08-26 | 2017-03-02 | Lg Electronics Inc. | Centrifugal fan |
| CN107975496A (en) * | 2017-05-23 | 2018-05-01 | 宁波方太厨具有限公司 | A kind of centrifugal blower volute |
| CN207647842U (en) * | 2017-12-28 | 2018-07-24 | 宁波方太厨具有限公司 | A kind of volute structure of centrifugal blower |
| CN109973434A (en) * | 2019-04-01 | 2019-07-05 | 宁波方太厨具有限公司 | A kind of spiral case and centrifugal blower for centrifugal blower |
| CN110864010A (en) * | 2019-12-10 | 2020-03-06 | 珠海格力电器股份有限公司 | Novel volute tongue structure, fan volute and fan |
| CN211202417U (en) * | 2019-12-12 | 2020-08-07 | 泛仕达机电股份有限公司 | Novel arc-shaped fan volute |
| CN214036259U (en) * | 2020-11-13 | 2021-08-24 | 珠海格力电器股份有限公司 | Volute structure and fan |
-
2020
- 2020-11-13 CN CN202011270802.6A patent/CN112303023A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170058914A1 (en) * | 2015-08-26 | 2017-03-02 | Lg Electronics Inc. | Centrifugal fan |
| CN107975496A (en) * | 2017-05-23 | 2018-05-01 | 宁波方太厨具有限公司 | A kind of centrifugal blower volute |
| CN207647842U (en) * | 2017-12-28 | 2018-07-24 | 宁波方太厨具有限公司 | A kind of volute structure of centrifugal blower |
| CN109973434A (en) * | 2019-04-01 | 2019-07-05 | 宁波方太厨具有限公司 | A kind of spiral case and centrifugal blower for centrifugal blower |
| CN110864010A (en) * | 2019-12-10 | 2020-03-06 | 珠海格力电器股份有限公司 | Novel volute tongue structure, fan volute and fan |
| CN211202417U (en) * | 2019-12-12 | 2020-08-07 | 泛仕达机电股份有限公司 | Novel arc-shaped fan volute |
| CN214036259U (en) * | 2020-11-13 | 2021-08-24 | 珠海格力电器股份有限公司 | Volute structure and fan |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114658689A (en) * | 2022-03-17 | 2022-06-24 | 哈尔滨工业大学 | Volute and centrifugal compressor |
| CN114658689B (en) * | 2022-03-17 | 2024-06-07 | 哈尔滨工业大学 | Volute and centrifugal compressor |
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