CN106958537B - Volute and air conditioner - Google Patents
Volute and air conditioner Download PDFInfo
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- CN106958537B CN106958537B CN201710317848.0A CN201710317848A CN106958537B CN 106958537 B CN106958537 B CN 106958537B CN 201710317848 A CN201710317848 A CN 201710317848A CN 106958537 B CN106958537 B CN 106958537B
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- volute
- throat
- triangular
- backflow
- fan blade
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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
- F04D29/663—Sound attenuation
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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
Abstract
The invention provides a volute and an air conditioner. The volute is arranged corresponding to the fan blade (5), and comprises a volute throat, a volute throat upstream wall surface (1) positioned on the upstream side of the volute throat and a volute throat downstream wall surface (2) positioned on the downstream side of the volute throat, wherein the volute throat upstream wall surface (1) is provided with a backflow preventing bulge (3), and the backflow preventing bulge (3) protrudes towards the fan blade (5). According to the volute and the air conditioner, the inflow resistance of airflow at the side of the heat exchanger can be reduced, the reflux resistance of airflow at the position with the minimum volute throat clearance is increased, and the turbulent kinetic energy and noise are reduced.
Description
Technical Field
The invention belongs to the technical field of air conditioning, and particularly relates to a volute and an air conditioner.
Background
The noise of the air duct is commonly derived from the impact of air flow on the wall surface in the air duct and the generation and diffusion process of air flow vortex in the rotating process of the fan blade, particularly in the areas of the volute throat and the volute of the fan, the speed and vortex energy of the air flow after flowing through the fan blade are large, and the noise is large. Noise at the position of the vortex throat is eliminated, and the vortex and turbulent energy of airflow at the position are reduced by properly lifting the vortex throat gap. Japanese patent (publication No.) JP2015092073a discloses a scroll provided with a convex structure in a downstream area of a position where a scroll throat clearance is minimum, which states that an air flow back flow at the position can be broken.
However, in practical tests, it is found that the above-mentioned solutions of japanese patent not only obstruct the smooth downstream flow of the air flow, but also disturb the smooth dynamic pressure line of the air flow, aggravate the eddy current and cause the aggravation of noise.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide the volute and the air conditioner, which can reduce the inflow resistance of airflow at the side of the heat exchanger, increase the reflux resistance of airflow at the position with minimum volute throat clearance and reduce turbulent energy and noise.
In order to solve the problems, the invention provides a volute, which is arranged corresponding to a fan blade and comprises a volute throat, a volute throat upstream wall surface positioned on the upstream side of the volute throat and a volute throat downstream wall surface positioned on the downstream side of the volute throat, wherein the volute throat upstream wall surface is provided with a backflow preventing bulge, and the backflow preventing bulge protrudes towards the fan blade.
Preferably, the backflow prevention protrusion includes a diverting tip disposed on a windward side of the backflow prevention protrusion.
Preferably, the height of the tip of the backflow preventing protrusion from the upstream wall surface of the volute throat is 0.1 to 2mm.
Preferably, the backflow preventing protrusions are arranged in a staggered manner on the upstream wall surface of the volute throat along the air flowing direction.
Preferably, any three adjacent backflow prevention protrusions are arranged in a triangle shape along the flow direction of the air.
Preferably, the backflow prevention protrusions are arranged in rows along the direction perpendicular to the air inflow direction, multiple rows of backflow prevention protrusions are arranged at intervals along the air inflow direction, and two adjacent rows of backflow prevention protrusions are arranged in a staggered mode.
Preferably, the upstream wall surface of the volute throat is also provided with a concave structure, and the concave structure is positioned on the lee side of the backflow preventing bulge.
Preferably, the diversion tip is provided with two diversion side surfaces for diverting the incoming flow, the two diversion side surfaces of the diversion tip form a first included angle, and the center of the concave structure is positioned on an angular bisector of the first included angle.
Preferably, a straight line formed by the center of the concave structure and the center of gravity of the backflow prevention protrusion is parallel to the incoming flow direction.
Preferably, the depth of the recessed features is from 0.1 to 1mm.
Preferably, the backflow preventing protrusions are triangular protrusions, and the tips of the triangular protrusions face against the windward side.
Preferably, the concave structure is circular, and the triangular protrusions and the concave structure satisfy the following relationship:
0< h1< d and 0< h3< h2;
wherein, H1 is the lateral distance between the centers of gravity of the adjacent nearest top triangular bulge and bottom triangular bulge along the air flow direction, H2 is the longitudinal distance between the centers of gravity of the adjacent nearest top triangular bulge and bottom triangular bulge along the air flow direction, H3 is the longitudinal distance between the centers of gravity of the triangular bulge and the center of the concave structure at the rear end of the triangular bulge, and d is the lateral distance between the centers of gravity of the two bottom triangular bulges along the air flow direction.
Preferably, the triangular convex and concave structures further satisfy the following relationship:
0< H2<2D or R <2D1;
wherein D1 is the bottom width of the triangular convex structure, and R is the circular diameter of the concave structure.
According to another aspect of the invention, an air conditioner is provided, comprising a volute and a fan blade, wherein the volute is the volute, and the volute is covered outside the fan blade and forms an air channel with the fan blade.
The volute provided by the invention is arranged corresponding to the fan blade and comprises a volute throat, a volute throat upstream wall surface positioned at the upstream side of the volute throat and a volute throat downstream wall surface positioned at the downstream side of the volute throat, wherein the volute throat upstream wall surface is provided with a backflow preventing bulge, and the backflow preventing bulge protrudes towards the fan blade. The backflow preventing protrusion on the volute is positioned in the airflow backflow area at the upstream of the volute throat, so that the inflow resistance of airflow at the side of the heat exchanger can be reduced, the backflow resistance at the minimum clearance of the volute throat formed between the volute and the fan blade is increased, the large vortex in the area is disturbed, a large quantity of small vortex street is formed, and the turbulent kinetic energy and noise in the air flowing process are reduced.
Drawings
FIG. 1 is a gray scale of a prior art cross flow fan airflow flow cloud;
FIG. 2 is a gray scale of a prior art flow vector diagram for the flow direction of the air flow in the region of the scroll throat of a cross flow fan;
FIG. 3 is a schematic view of the structure of a volute of an embodiment of the invention;
FIG. 4 is a flow direction block diagram of a volute of an embodiment of the invention;
FIG. 5 is a schematic view of the distribution of anti-backflow male and female structures of a volute of an embodiment of the present invention;
fig. 6 is a schematic structural view of an air conditioner according to an embodiment of the present invention;
fig. 7 is a schematic view of airflow structure between a scroll casing and a fan blade of an air conditioner according to an embodiment of the present invention.
The reference numerals in the drawings are as follows:
1. an upstream wall of the volute throat; 2. a downstream wall of the volute throat; 3. a backflow prevention protrusion; 4. a recessed structure; 5. a fan blade; 6. a volute; 7. a heat exchanger; a. the volute throat gap is the smallest.
Detailed Description
The above japanese patent does not play its purported role during actual application, but rather, the problem of aggravating the noise of the air conditioner is raised to some extent, and therefore, the applicant has conducted analysis and study on this, and it can be seen from experiments and simulation simulations of fig. 1 and 2 that in actual application of the scroll case, the position where the backflow of the scroll throat region occurs is not at the position shown in the patent, but is an upstream region of the minimum scroll throat gap position, and the downstream region is mainly downstream in a single direction, and does not cause a large backflow noise. If the arrangement mode according to the patent is adopted, not only the smooth downstream flow of the air flow is blocked, but also the smooth dynamic pressure line of the air flow is disturbed, so that the vortex is aggravated and the noise is aggravated. Based on this, the applicant proposes the technical solution of the present invention.
Referring to fig. 3 to 7 in combination, according to the embodiment of the present invention, a volute is provided corresponding to a fan blade 5, the volute includes a volute throat, a volute throat upstream wall surface 1 located on an upstream side of the volute throat, and a volute throat downstream wall surface 2 located on a downstream side of the volute throat, and a backflow preventing protrusion 3 is provided on a side of the volute throat upstream wall surface 1 facing the fan blade 5.
The backflow preventing bulge 3 on the volute is positioned in an airflow backflow area at the upstream of the volute throat, so that the inflow resistance of airflow at the side of the heat exchanger can be reduced on the premise of not changing the gap of the volute throat, the backflow resistance at the minimum gap of the volute throat formed between the volute and the fan blade is increased, the large vortex in the area is disturbed, and a large amount of small vortex street is formed, so that turbulent energy and noise in the air flowing process are reduced. The part with the minimum throat clearance a has the function of guiding the upstream airflow into the through-flow area and preventing the downstream airflow from flowing back.
Preferably, the backflow preventing protrusion 3 includes a diverting tip disposed on the windward side of the backflow preventing protrusion 3. The backflow preventing protrusion 3 is provided with a diversion tip on the windward side of the backflow preventing protrusion, so that the flow of the entering air flow can be diverted and guided, the flow resistance of the backflow preventing protrusion 3 to the air flow is reduced, the air can smoothly flow towards the downstream of the volute throat through the backflow preventing protrusion 3, the generation of turbulence and turbulence is reduced, the rectification effect on the air is achieved, and the flow efficiency of the air is improved. The cross section of the diversion tip towards the direction of air inflow is gradually reduced, two diversion side faces of the diversion tip facing the wind can be straight faces or cambered faces, when the two diversion side faces are straight faces, the diversion included angle between the two diversion side faces is 10-70 degrees, preferably, the diversion included angle is 30 degrees, the effect that the diversion included angle is too small to effectively reduce the inflow resistance of air flow can be prevented, and the oversized obstruction to the air flow caused by the oversized diversion included angle is also prevented, so that turbulent flow or turbulent flow of the air flow is caused.
The height of the backflow prevention protrusion 3 is 0.1 to 2mm, which is the height between the tip of the backflow prevention protrusion 3 and the upstream wall surface 1 of the volute throat where it is located. Preferably, the height of the backflow preventing protrusion 3 is 1mm, so that the situation that the interval between the backflow preventing protrusion 3 and the fan blade 5 is too small due to too high height of the backflow preventing protrusion 3, too large resistance is caused to air flow, static pressure distribution at the position of a minimum volute throat gap is affected, and the backflow preventing protrusion 3 is prevented from being too low in height to have an effective backflow preventing effect.
See table 1 for:
in table 1, the simulation data table of the influence of the backflow prevention protrusion 3 on the broadband noise value is shown, and it can be seen from table 1 that after the backflow prevention protrusion 3 is adopted, the noise is obviously reduced compared with the volute without the protrusion structure, the vortex value is also obviously reduced, and when the height of the backflow prevention protrusion 3 is 1mm, the noise reduction effect is optimal.
Preferably, the backflow prevention protrusions 3 are arranged offset on the upstream wall surface 1 of the volute throat in the flow direction of the air. Because the backflow preventing protrusions 3 are arranged on the wall surface 1 on the upstream side of the volute throat in a staggered manner, layer-by-layer blockage can be formed, the distribution area of the backflow preventing protrusions 3 is more reasonable, a denser and effective backflow preventing structure is formed, the backflow preventing protrusions can more effectively increase the flowing resistance of airflow from the minimum position of the volute throat gap to the wall surface 1 on the upstream side of the volute throat, larger vortex streets in the area are more effectively disturbed through the staggered backflow preventing protrusions 3, a larger amount of smaller vortex streets are formed, and turbulent energy and noise are reduced.
Preferably, any three adjacent backflow preventing protrusions 3 are arranged in a triangle shape along the flow direction of the air.
Preferably, the backflow prevention protrusions 3 are arranged in rows along a direction perpendicular to the air inflow direction, multiple rows of backflow prevention protrusions 3 are arranged at intervals along the air inflow direction, and two adjacent rows of backflow prevention protrusions 3 are arranged in a staggered manner. The backflow prevention protrusions 3 are arranged in a row along the direction perpendicular to the incoming flow of air, backflow is prevented, meanwhile, the phenomenon that the airflow at the position is unknown in the axial direction of the fan blade to generate significant asymmetric flow is avoided, and the problems that the airflow moves along the axial direction of the cross-flow fan blade to cause fan surge, abnormal sound is generated and the like are avoided.
In this embodiment, the upstream wall surface 1 of the volute throat is further provided with a concave structure 4, and the concave structure 4 is located on the lee side of the backflow preventing protrusion 3. After the backflow preventing protrusion 3 breaks up the larger vortex street in the upstream area of the vortex throat, the larger vortex street is decomposed into a plurality of smaller vortex streets, the smaller vortex streets enter the concave structure 4 behind the backflow preventing protrusion 3 in the flowing process of the area of the upstream wall surface 1 of the vortex throat, and the resistance in the diffusion process of the smaller vortex streets is increased through the concave structure 4, so that the purposes of rectifying and reducing noise are achieved. Simulation results show that after the volute structure is adopted, the total broadband noise value can be reduced by 0.8dB (A).
Preferably, the diverting tip has two diverting sides for diverting the incoming flow, the two diverting sides of the diverting tip forming a first angle, the center of the concave structure 4 being located on an angular bisector of the first angle. The center of the concave structure 4 is arranged on the angular bisector of the first included angle, so that two split side faces split air flowing to the concave structure 4, and air flow distribution from two sides into the concave structure 4 after split is performed through the split side faces is more uniform, and the air flow can be decomposed more thoroughly in the concave structure 4, so that the rectifying and noise reducing effects are improved.
Preferably, the straight line that the center of the concave structure 4 and the gravity center of the backflow preventing bulge 3 constitute is parallel to the incoming flow direction, so that the position relation between the backflow preventing bulge 3 and the concave structure 4 is more reasonable, the flow of air flow is smoother, the flow distribution is faster, the air flow distribution is more uniform, the coordination between the backflow preventing bulge 3 and the concave structure 4 is better, the backflow preventing effect is further improved, and the rectifying and noise reducing effect is improved.
In this embodiment, the backflow preventing protrusion 3 is a triangular protrusion, and the tip of the triangular protrusion faces the windward side. Preferably, the triangular bulge is an isosceles triangle bulge, and two isosceles sides of the isosceles triangle bulge form windward sides, so that when air flows through the triangular bulge, the formed diversion effect is more balanced, and the air flow distribution is more uniform. The backflow preventing protrusion 3 may be a cylinder, and a triangular diversion tip is arranged on the windward side of the cylinder to effectively divert the air inflow. The backflow preventing protrusion 3 may have other shapes.
Preferably, a straight line formed by the center of the concave structure 4 and the center of gravity of the triangular protrusion is parallel to the incoming flow direction. Because the straight line that the center of the concave structure 4 and the center of gravity of the triangle bulge constitute is parallel with the incoming flow direction, therefore, the air current that shunts through the triangle bulge can evenly enter into the concave structure 4 at the rear side of the triangle bulge, and the air current flow and the kinetic energy that enter into the concave structure 4 from both sides are approximately balanced, the concave structure 4 can more conveniently decompose large vortex street into a plurality of small vortex streets, hold and delay the small vortex streets, prevent the small vortex streets after decomposition from diffusing and entering into a through-flow area, the flowing effect of the air current is improved, the size of the vortex streets after decomposition is more even, the decomposition efficiency is higher, and the turbulence energy and noise generated by the turbulence energy can be more effectively reduced.
Preferably, the depth of the recessed features 4 is 0.1 to 1mm. More preferably, the depth of the concave structure 4 is 0.5mm, so that the concave with the optimal depth can be improved, the decomposition effect of the concave structure 4 on the large vortex street is improved, and the noise reduction effect of the volute is improved.
As shown in Table 2, the data sheet was simulated for the effect on broadband noise value after the concave structure when the anti-reflux protrusions with a height of 1mm were used
As can be seen from Table 2, after the height of the anti-backflow protrusion is determined, the vortex value is obviously reduced after the concave structure is added, and after the concave depth reaches a certain value, the noise is also obviously reduced, and particularly, when the concave depth is 0.5mm, the noise reduction effect is better and more obvious.
Therefore, after the structure of matching the backflow-preventing convex structure and the concave structure is adopted, the rectifying and noise-reducing effects are better.
Preferably, the concave structures 4 are circular, and the triangular protrusions and concave structures 4 satisfy the following relationship:
0< h1< d and 0< h3< h2;
wherein, H1 is the lateral distance between the centers of gravity of the top triangular bulge and the bottom triangular bulge which are adjacent nearest to each other along the air flow direction, H2 is the longitudinal distance between the centers of gravity of the top triangular bulge and the bottom triangular bulge which are adjacent to each other along the air flow direction, H3 is the longitudinal distance between the centers of gravity of the triangular bulge and the center of the concave structure 4 at the rear end of the triangular bulge, and d is the lateral distance between the centers of gravity of the two bottom triangular bulges along the air flow direction.
0< H1< d is used for ensuring that the combination of the triangular protrusions and the recesses can be staggered with the corresponding combination between the adjacent rows, increasing the backflow blocking area and achieving the purpose of effectively blocking backflow.
0< H2<2d is combined with 0< H1< d, so that the three nearest triangular protrusions and depressions can form a triangle between an isosceles right triangle and an equilateral triangle, and the combination can utilize space to a large extent, namely, noise elimination combinations are arranged in a limited space as much as possible.
The triangular protruding and recessed structures 4 may also satisfy the following relationship: 0< H2<2D or R <2D1; wherein D1 is the width of the bottom of the triangular bulge structure, R is the circular diameter of the concave structure 4, and the bottom is the bottom edge of the lee side of the triangular bulge.
0< H3< H2 is to ensure that the distance between the circular concave structure and the rear side of the triangular convex structure is proper, if the distance is too far, the small vortex street does not go at all, and if the distance is too close, howling is easy to be generated by interaction with the convex structure.
R <2D1 is in order to avoid circular recess to touch the pointed end of adjacent protruding structure, avoids producing squeal between circular recess and the pointed end, improves rectification noise reduction effect.
This structure can make triangle-shaped arch and concave structure 4 arrange more rationally, and is better to the decomposition effect of vortex street, and can hinder the downstream air current to the upstream backward flow more effectively, forms better noise elimination cooperation structure group, further improves the noise reduction effect of spiral case.
The recess structures may also be elliptical recesses, triangular recesses, rectangular recesses or recesses of other shapes.
When the concave structure is an elliptical concave, R is the length of the major axis of the elliptical concave; when the concave structure is rectangular, R is the bottom side of the rectangle; when the concave structure is a triangular concave, R is the base of the triangle, wherein each base refers to the side on the lee side of the concave structure.
The working principle of the volute of the invention is as follows: when air flow enters the volute throat area from the outside, the air flow close to the fan blade 5 smoothly enters the through-flow area through the volute throat molded line, the area close to the volute throat wall surface smoothly passes through the triangular bulge and enters the volute throat area, and the reflux generated in the minimum volute throat area and the local upstream meets the triangular bulge structure in the upstream development process, so that the reflux is prevented from continuing to develop upstream, the large vortex street in the volute throat area is interrupted, the generated small vortex street returns and is collected and enters the circular concave structure, the small vortex street is limited to diffuse in the concave structure and gradually reduce energy, and finally disappears, so that the noise in the volute throat area is reduced.
According to the embodiment of the invention, the air conditioner comprises the volute 6 and the fan blade 5, wherein the volute 6 is the volute, and the volute is covered outside the fan blade 5 and forms an air channel with the fan blade 5.
The air conditioner further comprises a heat exchanger 7, the heat exchanger 7 forms a recess, and the volute 6 and the fan blade 5 are arranged in the recess formed by the heat exchanger 7.
It will be readily appreciated by those skilled in the art that the above advantageous ways can be freely combined and superimposed without conflict.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (13)
1. The volute is arranged corresponding to the fan blade (5) and is characterized by comprising a volute throat, a volute throat upstream wall surface (1) positioned on the upstream side of the volute throat and a volute throat downstream wall surface (2) positioned on the downstream side of the volute throat, wherein the volute throat protrudes towards the fan blade (5), and a minimum gap of the volute throat is formed between the volute and the fan blade (5); the volute throat upstream wall surface (1) is provided with a backflow prevention protrusion (3), the backflow prevention protrusion (3) is positioned in an airflow backflow area at the upstream of the volute throat and protrudes towards the fan blade (5) so as to increase backflow resistance at the minimum gap of the volute throat formed between the volute and the fan blade (5) and reduce turbulence energy and noise in the air flowing process;
the volute throat upstream wall surface (1) is also provided with a concave structure (4), and the concave structure (4) is positioned on the lee side of the backflow preventing bulge (3).
2. The volute of claim 1, wherein the backflow prevention protrusion (3) comprises a diverter tip arranged on a windward side of the backflow prevention protrusion (3).
3. A volute according to claim 1, wherein the tip of the backflow prevention protrusion (3) is 0.1 to 2mm in height from the upstream wall (1) of the volute where it is located.
4. A volute according to claim 1, wherein the backflow prevention protrusions (3) are arranged offset on the upstream wall surface (1) of the volute throat in the flow direction of the air.
5. A volute according to claim 4, wherein any three adjacent anti-backflow protrusions (3) are arranged in a triangle in the flow direction of the air.
6. The volute of claim 4, wherein the backflow prevention protrusions (3) are arranged in rows along a direction perpendicular to an air inflow direction, a plurality of rows of the backflow prevention protrusions (3) are arranged at intervals along the air inflow direction, and two adjacent rows of the backflow prevention protrusions (3) are arranged in a staggered manner.
7. The volute of claim 2, wherein the diverting tip has two diverting sides that divert incoming flow, the two diverting sides of the diverting tip forming a first included angle, the center of the recessed feature (4) being located on an angular bisector of the first included angle.
8. The volute of claim 7, wherein a straight line of the center of the concave structure (4) and the center of gravity of the backflow preventing protrusion (3) is parallel to the incoming flow direction.
9. A volute according to claim 1, wherein the depth of the recessed features (4) is 0.1 to 1mm.
10. The volute of claim 1, wherein the backflow prevention protrusion (3) is a triangular protrusion, the tip of the triangular protrusion facing the windward side.
11. The volute of claim 10, wherein the concave structure (4) is circular, and wherein the triangular protrusions and the concave structure (4) satisfy the following relationship:
0< h1< d and 0< h3< h2;
wherein H1 is the transverse distance between the centers of gravity of the top triangular bulge and the bottom triangular bulge which are adjacent nearest to each other along the air flow direction, H2 is the longitudinal distance between the centers of gravity of the top triangular bulge and the bottom triangular bulge which are adjacent to each other along the air flow direction, H3 is the longitudinal distance between the centers of gravity of the triangular bulge and the center of the concave structure (4) at the rear end of the triangular bulge, and d is the transverse distance between the centers of gravity of the two bottom triangular bulges along the air flow direction.
12. The volute of claim 11, wherein the triangular protrusions and the recessed structures (4) further satisfy the following relationship:
0< H2<2D or R <2D1;
wherein D1 is the bottom width of the triangular convex structure, and R is the circular diameter of the concave structure (4).
13. An air conditioner comprising a volute (6) and a fan blade (5), wherein the volute (6) is a volute according to any one of claims 1 to 12, and the volute is covered outside the fan blade (5) and forms an air channel with the fan blade (5).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710317848.0A CN106958537B (en) | 2017-05-08 | 2017-05-08 | Volute and air conditioner |
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|---|---|---|---|
| CN201710317848.0A CN106958537B (en) | 2017-05-08 | 2017-05-08 | Volute and air conditioner |
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| CN106958537A CN106958537A (en) | 2017-07-18 |
| CN106958537B true CN106958537B (en) | 2023-06-06 |
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| CN108036485B (en) * | 2018-01-15 | 2023-07-18 | 奥克斯空调股份有限公司 | Air duct structure and air conditioner |
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| CN102297141B (en) * | 2010-06-24 | 2013-04-24 | 江门市地尔汉宇电器股份有限公司 | Small centrifugal water pump with impeller directly driven by internal rotor motor |
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| JP6468416B2 (en) * | 2013-09-30 | 2019-02-13 | ダイキン工業株式会社 | Cross flow fan and air conditioner indoor unit equipped with the same |
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| US5127800A (en) * | 1984-03-20 | 1992-07-07 | Baker Hughes Incorporated | Flow-stabilizing volute pump and liner |
| JP2011122517A (en) * | 2009-12-10 | 2011-06-23 | Mitsubishi Heavy Ind Ltd | Multi-blade centrifugal fan and air conditioner using the same |
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