CN212378124U - Flow guide ring and air conditioner - Google Patents

Abstract

The utility model provides a water conservancy diversion circle and air conditioner relates to air conditioner technical field, for solving the big problem design of off-premises station during operation discrete noise. The guide ring is of a pipeline ring-shaped structure, the inner circumferential surface of the guide ring is provided with a plurality of turbulence parts, the plurality of turbulence parts are distributed along the circumferential direction of the guide ring, and a circumferential interval is formed between any two adjacent turbulence parts; the spoiler has at least two unequal circumferential intervals. The air conditioner comprises the guide ring. The utility model provides a water conservancy diversion circle and air conditioner weaken or even eliminated the periodic action of air current to the water conservancy diversion circle inner peripheral surface, reduced discrete noise effectively.

Description

Flow guide ring and air conditioner

Technical Field

The utility model relates to an air conditioner technical field particularly, relates to a water conservancy diversion circle and air conditioner.

Background

The air conditioner comprises an outdoor unit and an indoor unit. The outdoor unit fan system mainly adopts axial flow fan blades and a semi-open type flow guide ring surrounding the axial flow fan blades, on one hand, airflow generated by the axial flow fan blades can periodically impact the inner circumferential surface of the flow guide ring, so that periodic pressure pulsation of the inner circumferential surface of the flow guide ring is caused, and the discrete noise of the fan is increased; on the other hand, the flow guide ring is deformed, and the concentricity of the flow guide ring and the axial flow fan blade is reduced, so that the air quantity of the outdoor unit is reduced, the vibration is generated, and the noise is increased. In addition, the too big deformation of the guide ring also makes the axial fan blade and the guide ring interfere with each other easily, which affects the normal operation of the outdoor unit of the air conditioner.

SUMMERY OF THE UTILITY MODEL

A first object of the present invention is to provide a flow guiding ring to solve the technical problem of large discrete noise in outdoor unit operation.

The utility model provides a flow guiding ring for use with axial fan blade cooperation, axial fan blade is rotatory around the rotation axis, the flow guiding ring is the tubular circle column structure, the inner peripheral surface of flow guiding ring is provided with a plurality of vortex portions, a plurality of vortex portions are arranged along the circumference of flow guiding ring, and there is a circumference interval between two vortex portions that are arbitrarily adjacent; the spoiler portion has at least two kinds of circumferential intervals that are not equal.

The inner circumferential surface of the flow guide ring is provided with the turbulence part to perform turbulence on airflow generated by the axial flow fan blade, so that the impact force of the airflow is effectively dispersed, and the pressure pulsation of the inner circumferential surface of the flow guide ring is weakened. And the plurality of turbulence parts are unevenly distributed along the circumferential direction, so that the periodic action of the axial flow fan blade on the inner circumferential surface of the flow guide ring is weakened or even eliminated in the rotating process of the axial flow fan blade, and the discrete noise is effectively reduced.

Furthermore, the turbulence part is a groove arranged on the inner circumferential surface of the flow guide ring. So set up, not only increased the air current impact area of water conservancy diversion circle inner peripheral surface, moreover, the structural style of recess has still increased the rigidity of water conservancy diversion circle, promptly: the deformation resistance of the guide ring is increased, so that the deformation of the guide ring in the working process of the outdoor unit is reduced.

Further, it is a plurality of the recess is followed the circumference of water conservancy diversion circle is arranged and is one row, each the quantity of recess is 5 ~ 500. So set up, not only can guarantee the vortex effect of recess to the air current, moreover, can also be with the friction area restriction of the inner peripheral surface of water conservancy diversion circle and air current in setting for the within range, guarantee the efficiency of fan.

Further, the axial flow fan blade is provided with a plurality of blades, and the number of the grooves in each row is a non-integral multiple of the number of the blades. By the arrangement, periodic airflow impact between the axial flow fan blade and the inner circumferential surface of the flow guide ring can be further eliminated in the rotating process of the axial flow fan blade.

Further, the central angle of two adjacent grooves relative to the rotating shaft is a, and the value range of a is between (360 °/N-3 °) and (360 °/N +3 °), wherein N is the number of the grooves in each row. By utilizing the arrangement mode of the grooves, the periodic action of the axial flow fan blades on the inner peripheral surface of the flow guide ring can be effectively weakened, and the discrete noise of the fan is reduced.

Further, the difference between any two adjacent central angles is not more than 5 °.

Further, the water conservancy diversion circle includes the edge import guide section, interlude and the export guide section that the axial of rotation axis set gradually, the interlude is followed the axial extension of rotation axis, the recess is seted up in the interlude. So set up, not only be convenient for process the recess, moreover, can also carry out abundant vortex to the air current at the in-process that the air current flows in the water conservancy diversion circle, dispersion air current impact force is to the influence of water conservancy diversion circle.

Further, the maximum size of the notch of the groove is d, and the length of the middle section in the axial direction of the rotating shaft is L, wherein d is (0.01-0.6) L. By the arrangement, the value range of d is limited, and blade top airflow leakage caused by the increase of a blade top gap formed between the axial flow fan blade and the inner circumferential surface of the flow guide ring due to the overlarge d is avoided; on the other hand, the situations of insufficient rigidity of the guide ring and high processing difficulty caused by too small d are also avoided.

Further, the shortest distance from the notch of the groove to the inlet guide section is e, and the length of the middle section in the axial direction of the rotating shaft is L, wherein e is (0.1-0.6) L. By the arrangement, for the limitation of the value range of e, on one hand, the situations that the maximum size of the groove is limited and the rigidity of the flow guide ring is insufficient due to the fact that e is too large are avoided; on the other hand, the situation that the distance between the groove and the inlet guide section is short due to the fact that e is too small, so that the air inlet flow direction is disturbed and the air inlet of the inlet guide section is not facilitated is also avoided.

Further, along the radial direction of the guide ring, the shortest distance from the axial flow fan blade to the guide ring is d1, and the depth of the groove is d2, wherein d2 is (0.02-0.6) × d 1. Due to the arrangement, on one hand, the situation that the grooves are easily blocked by dust to weaken the turbulent flow effect due to too small d2 is avoided, and the problem that the rigidity of the flow guide ring is not obviously improved due to too small d2 is also avoided; on the other hand, the situation that the blade top clearance is increased due to the fact that d2 is too large, and the air volume is reduced is avoided.

Further, the surface of the groove is in smooth transition, and/or the connection part of the notch of the groove and the inner circumferential surface of the flow guide ring is in smooth transition. With this arrangement, noise caused by airflow impact can be further reduced.

A second object of the present invention is to provide an air conditioner to solve the technical problem of large discrete noise in the operation of the outdoor unit.

The utility model provides an air conditioner, including above-mentioned water conservancy diversion circle.

By arranging the guide ring in the air conditioner, the air conditioner has all the advantages of the guide ring, and the description is omitted.

Furthermore, the air conditioner also comprises an air outlet grille, wherein the air outlet grille is arranged on the panel of the outdoor unit and is close to the outlet guide section of the flow guide ring; the air outlet grille comprises a plurality of annular ribs which are concentrically arranged; the cross-section molded line of the outlet guide section in the axial direction is an arc line, the tangent line of the cross-section molded line at the outlet of the flow guide ring and the axial direction of the rotating shaft form an included angle theta 1, the annular rib and the axial direction of the rotating shaft form an included angle theta 2, and the difference value between the theta 1 and the theta 2 is not more than 5 degrees. So set up, optimized the air current from export guide section to the flow path of air-out grid for after the air current left the water conservancy diversion circle, can smoothly flow to the air-out grid.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is an axial view of a partial structure of an air conditioner according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a deflector ring according to an embodiment of the present invention;

FIG. 3 is a partial schematic view of the deflector ring shown in FIG. 2 at A in a radial direction thereof;

FIG. 4 is a partial schematic view of the deflector ring shown in FIG. 2 at A along its axial direction;

fig. 5 is a side exploded view of a part of the structure of an air conditioner according to an embodiment of the present invention;

fig. 6 is an enlarged view of a portion B of fig. 5.

Description of reference numerals:

100-a guide ring; 110-an inlet guide section; 120-an outlet guide section; 130-middle section; 140-a groove; 121-section profile;

200-axial flow fan blades; 210-a pressure surface; 220-suction surface; 230-a blade;

300-an air outlet grid; 310-radial ribs; 320-circumferential ribs;

400-rotation axis;

a-the central angle of two adjacent grooves relative to the rotation axis;

s-circumferential spacing;

d-the maximum dimension of the notch of the groove;

e-the shortest distance from the notch of the groove to the inlet guide section;

l-the length of the middle section;

d 1-the shortest distance from the axial flow fan blade to the guide ring;

d 2-depth of groove.

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. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Fig. 1 is an axial schematic exploded view of a partial structure of an air conditioner according to this embodiment, and fig. 2 is a schematic structural view of a baffle ring 100 according to this embodiment. As shown in fig. 1, the present embodiment provides an air conditioner, which includes an axial flow fan blade 200 and a flow guiding ring 100, where the structure of the flow guiding ring 100 is shown in fig. 2, where the axial flow fan blade 200 is disposed in the flow guiding ring 100, and the axial flow fan blade 200 can rotate around a rotation shaft 400.

It should be noted that the diameter of the axial-flow fan blade 200 is smaller than the inner diameter of the flow guide ring 100, that is: a gap exists between the blade tip of the axial-flow blade 200 and the inner circumferential surface of the flow guiding ring 100, and the gap is called a blade tip gap. When the outdoor unit is in operation, airflow flows from the suction surface 220 of the axial-flow fan blade 200 to the pressure surface 210 thereof through the blade tip gap.

Specifically, please continue to refer to fig. 2, the flow guiding ring 100 is a tubular ring-shaped structure, the inner circumferential surface of the flow guiding ring 100 is provided with a plurality of flow disturbing portions, the plurality of flow disturbing portions are arranged along the circumferential direction of the flow guiding ring 100, and a circumferential interval S exists between any two adjacent flow disturbing portions. Wherein, the vortex portion has at least two kinds of unequal circumferential interval S.

The inner circumferential surface of the flow guide ring 100 is provided with the turbulence part to disturb the airflow generated by the axial flow fan blade 200, so that the impact force of the airflow is effectively dispersed, and the pressure pulsation of the inner circumferential surface of the flow guide ring 100 is weakened. Moreover, the plurality of turbulence portions are arranged in a non-uniform manner along the circumferential direction, so that in the rotation process of the axial flow fan blade 200, the periodic action of the axial flow fan blade 200 on the inner circumferential surface of the flow guide ring 100 is weakened or even eliminated, and the discrete noise is effectively reduced.

In this embodiment, the spoiler may have two kinds of unequal circumferential intervals S, or may have three kinds of even more kinds of unequal circumferential intervals S, as long as the spoiler is unevenly distributed along the circumferential direction on the inner circumferential surface of the flow guiding ring 100.

Referring to fig. 1 and fig. 2, in the present embodiment, the spoiler is a groove 140 opened on the inner circumferential surface of the deflector ring 100. So set up, not only increased the air current impact area of water conservancy diversion circle 100 inner peripheral surface, moreover, the structural style of recess 140 has still increased the rigidity of water conservancy diversion circle 100, promptly: the anti-deformation capacity of the guide ring 100 is increased, so that the deformation of the guide ring 100 in the working process of the outdoor unit is reduced, the concentricity of the guide ring 100 and the axial flow fan blade 200 is ensured, the air quantity of the outdoor unit is improved, the vibration is reduced, the noise is further reduced, meanwhile, the interference to the axial flow fan blade 200 caused by the overlarge deformation of the guide ring 100 is avoided to a certain extent, and the normal and reliable work of the outdoor unit is ensured.

In other embodiments, the spoiler may also be a protrusion protruding from the inner circumferential surface of the deflector ring 100. In the rotation process of the axial flow fan blade 200, the protrusions disturb the airflow generated by the axial flow fan blade 200, and the purposes of dispersing the impact strength of the airflow, weakening the pressure pulsation on the inner circumferential surface of the flow guide ring 100 and reducing the noise can be achieved.

Fig. 3 is a partial structural view of the deflector ring 100 shown in fig. 2 at a in a radial direction thereof. Referring to fig. 1 and fig. 2 in combination with fig. 3, in the present embodiment, the groove 140 is a circular groove. So set up, the processing of being convenient for can reduce the manufacturing cost of water conservancy diversion circle 100.

In other embodiments, the groove 140 may also be an elliptical groove, a rectangular groove, or the like, as long as the groove 140 is configured to disturb the airflow and improve the rigidity of the baffle ring 100, and the specific shape of the groove 140 is not limited in this embodiment.

Referring to fig. 1 and fig. 2, in the present embodiment, the plurality of grooves 140 are arranged in a row along the circumferential direction of the baffle ring 100, that is, the axial positions of the plurality of grooves 140 relative to the rotating shaft 400 are the same, wherein the number of the grooves 140 is 5 to 500. Through the quantity restriction with one row of recess 140 between 5 ~ 500, not only can guarantee the vortex effect of recess 140 to the air current, moreover, can also restrict the friction area of the inner peripheral surface of water conservancy diversion circle 100 and air current in setting for the within range to avoid leading to frictional resistance increase because of recess 140 is many, thereby reduce the condition of fan efficiency.

With reference to fig. 1, the axial-flow fan blade 200 has a plurality of blades 230, and the number of the grooves 140 is a non-integral multiple of the number of the blades 230. By such arrangement, periodic airflow impact between the axial flow fan blade 200 and the inner circumferential surface of the flow guide ring 100 can be further eliminated in the rotation process of the axial flow fan blade 200.

Specifically, such as: in the present embodiment, the number of the blades 230 is 3, and when the grooves 140 are arranged in a row, the number of the grooves 140 may be 17.

In other embodiments, the grooves 140 may also be arranged in multiple rows, multiple rows of the grooves 140 are arranged at intervals along the axial direction of the rotating shaft 400, and the grooves 140 in each row are in one-to-one correspondence with the grooves 140 in other rows in the axial direction of the rotating shaft 400, that is: the phase angle between the rows of grooves 140 is the same. Of course, it is also possible to offset the rows of grooves 140, i.e.: the phase angle differs between the rows of grooves 140.

It should be noted that, when the grooves 140 on the inner circumferential surface of the baffle ring 100 are provided with a plurality of rows, the number of the grooves 140 in each row may be the same, or the number of the grooves 140 in each row may be different, or the number of the grooves 140 in some rows may be the same.

It should be further noted that, when the grooves 140 on the inner circumferential surface of the flow guiding ring 100 are provided with a plurality of rows, the total number of all the grooves 140 may be an integral multiple or a non-integral multiple of the number of the blades 230 on the premise that the number of the grooves 140 in each row is a non-integral multiple of the number of the blades 230.

Referring to fig. 2, in the embodiment, the central angles a of two adjacent grooves 140 with respect to the rotation axis 400 are in the range of (360 °/N-3 °) to (360 °/N +3 °), where N is the number of the grooves 140, and the difference between any two adjacent central angles is not greater than 5 °, that is: in fig. 2, a1-a2 is-5 ° to 5 °. By utilizing the arrangement mode of the grooves 140, the periodic action of the axial flow fan blades 200 on the inner circumferential surface of the guide ring 100 can be effectively weakened, and the discrete noise of the fan is optimized.

Note that, in the present embodiment, the "central angle of two adjacent grooves 140 with respect to the rotation axis 400" means: the centers of two adjacent grooves 140 are respectively connected with the center of the deflector ring 100, and the angle between the two connecting lines is formed. Specifically, in the present embodiment, the groove 140 is a circular groove, and the center of the groove 140 is the center of the circle coplanar with the inner circumferential surface of the deflector ring 100.

With reference to fig. 2, in the present embodiment, the flow guiding ring 100 may include an inlet guiding section 110, an intermediate section 130, and an outlet guiding section 120 sequentially arranged along an axial direction of the rotating shaft 400, specifically, the intermediate section 130 extends along the axial direction of the rotating shaft 400, that is: the middle section 130 is a straight line section, and the groove 140 is opened in the middle section 130.

By arranging the inlet guide section 110, the air flow is guided in the air flow inlet process, and the air flow can be smoothly guided into the middle section 130; and through setting up export guide section 120, then can realize the guide to the air current discharge in-process, guarantee the smooth and easy discharge of air current. Through setting up interlude 130 to the straightway to seting up recess 140 in interlude 130, the processing of recess 140 of not only being convenient for, moreover, can also carry out abundant vortex to the air current at the in-process that the air current flows in water conservancy diversion circle 100, the influence of dispersion air current impact force to water conservancy diversion circle 100.

Referring to fig. 3, in the present embodiment, the maximum dimension of the notch of the groove 140 is d, the shortest distance from the notch of the groove 140 to the inlet guide section 110 is e, and the length of the middle section 130 along the axial direction of the rotating shaft 400 is L, where d is (0.01-0.6) × L, and e is (0.1-0.6) × L.

The arrangement form of d (0.01-0.6) × L is adopted, on one hand, the phenomenon that blade top airflow leakage is caused by the increase of a blade top gap formed between the axial flow fan blade 200 and the inner circumferential surface of the flow guide ring 100 due to the fact that d is too large is avoided, and therefore the air quantity of the outdoor unit is reduced; on the other hand, the situations of insufficient rigidity and large processing difficulty of the guide ring 100 caused by too small d are also avoided.

The arrangement form of e ═ (0.1-0.6) × L is adopted, so that the situations that the maximum size of the groove 140 is limited and the rigidity of the guide ring 100 is insufficient due to the fact that e is too large are avoided; on the other hand, the situation that the distance between the groove 140 and the inlet guide section 110 is short due to the fact that e is too small, so that the air inlet flow direction is disturbed and the air inlet of the inlet guide section 110 is not facilitated is avoided, and the outdoor unit is guaranteed to have enough air volume.

Fig. 4 is a partial structural view of the deflector ring 100 shown in fig. 2 at a along an axial direction thereof. As shown in fig. 4, in the embodiment, along the radial direction of the flow guiding ring 100, the shortest distance from the axial-flow fan blade 200 to the flow guiding ring 100 is d1, and the depth of the groove 140 is d2, where d2 is (0.02-0.6) × d 1.

Due to the arrangement, on one hand, the situation that the groove 140 is easily blocked by dust to weaken the turbulent flow effect due to the fact that d2 is too small is avoided, and the problem that the rigidity of the guide ring 100 is not obviously improved due to the fact that d2 is too small is also avoided; on the other hand, the situation that the blade top clearance is increased due to the fact that d2 is too large, and the air volume is reduced is avoided.

Referring to fig. 4, in the present embodiment, the surface of the groove 140 is in a smooth transition, and the connection between the notch of the groove 140 and the inner circumferential surface of the baffle ring 100 is in a smooth transition. With such an arrangement, the airflow can be guided to a certain degree, so that the impact force when the airflow impacts the inner circumferential surface of the deflector ring 100 is gentle, and the noise generated by the airflow impact is reduced.

In other embodiments, only the surface of the groove 140 may be smoothly transited, or only the connection between the notch of the groove 140 and the inner circumferential surface of the baffle 100 may be smoothly transited, which may reduce the impact noise of the airflow to some extent.

Fig. 5 is a side exploded schematic view of a part of the structure of the air conditioner provided in the present embodiment, and fig. 6 is an enlarged view of a part of the structure at B in fig. 5. As shown in fig. 5 and 6, the air conditioner further includes an outlet grill 300, wherein the outlet grill 300 is installed on the outdoor unit panel and is adjacent to the outlet guide section 120 of the baffle 100.

With reference to fig. 1, fig. 5 and fig. 6, in the present embodiment, specifically, the air outlet grille 300 includes a plurality of concentrically arranged circumferential ribs 320, and radial ribs 310 connected to at least some of the circumferential ribs 320; the section profile 121 of the outlet guide section 120 in the axial direction thereof is an arc line, an included angle θ 1 is formed between a tangent of the section profile 121 at the outlet of the flow guide ring 100 and the axial direction of the rotating shaft 400, an included angle θ 2 is formed between the circumferential rib 320 and the axial direction of the rotating shaft 400, and a difference value between θ 1 and θ 2 is not greater than 5 °.

In the working process of the outdoor unit of the air conditioner, airflow enters from the inlet guide section 110 of the guide ring 100 and flows from the suction surface 220 of the axial flow fan blade 200 to the pressure surface 210 thereof through the blade top gap; when the air flows to the middle section 130, the grooves 140 formed in the middle section 130 disturb the air flow, and disperse the impact force of the air flow to weaken the pressure pulsation of the flow guiding ring 100; in the process of further flowing to the outlet guide section 120, the airflow is guided out by the outlet guide section 120 and further flows into the outlet grille 300.

By limiting the difference between theta 1 and theta 2 within 5 degrees, the flow path of the airflow from the outlet guide section 120 to the air outlet grille 300 is optimized, so that the airflow can smoothly flow to the air outlet grille 300 after leaving the flow guide ring 100, the loss of the airflow from the flow guide ring 100 to the air outlet grille 300 in the flowing process is reduced, and the air volume is favorably improved.

Referring to fig. 1, in the present embodiment, the number of the radial ribs 310 is multiple, wherein a part of the radial ribs 310 is connected to a part of the circumferential ribs 320, and another part of the radial ribs 310 is connected to all of the circumferential ribs 320. It will be appreciated that all radial ribs 310 may also be arranged to connect to part of the circumferential ribs 320, and that all radial ribs 310 may also be arranged to connect to all circumferential ribs 320. As long as it is through this kind of structural style of hoop muscle 320 and radial muscle 310, can guarantee when the air-out is smooth, can also guarantee the structural strength of air-out grid 300.

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.

Finally, it is also to be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (13)

1. A flow guide ring is used in cooperation with an axial flow fan blade (200), and the axial flow fan blade (200) rotates around a rotating shaft (400), and is characterized in that the flow guide ring (100) is of a pipeline type ring-shaped structure, a plurality of flow disturbing parts are arranged on the inner circumferential surface of the flow guide ring (100), the flow disturbing parts are distributed along the circumferential direction of the flow guide ring (100), and a circumferential interval exists between any two adjacent flow disturbing parts;

the spoiler portion has at least two kinds of circumferential intervals that are not equal.

2. The deflector ring according to claim 1, wherein the spoiler is a groove (140) opened on an inner circumferential surface of the deflector ring (100).

3. The deflector ring according to claim 2, wherein the plurality of grooves (140) are arranged in a row along the circumferential direction of the deflector ring (100), and the number of the grooves (140) in each row is 5-500.

4. The baffle ring as claimed in claim 3, wherein the axial flow fan blade (200) has a plurality of blades (230), and the number of the grooves (140) in each row is a non-integral multiple of the number of the blades (230).

5. The deflector ring according to claim 3, wherein the central angle a of two adjacent grooves (140) with respect to the rotation axis (400) is in the range of (360 °/N-3 °) to (360 °/N +3 °), where N is the number of grooves (140) in each row.

6. The baffle of claim 5 wherein any two adjacent central angles differ by no more than 5 °.

7. The deflector ring according to any one of claims 2 to 6, wherein the deflector ring (100) comprises an inlet guide section (110), an intermediate section (130) and an outlet guide section (120) which are arranged in sequence in the axial direction of the rotating shaft (400), the intermediate section (130) extends in the axial direction of the rotating shaft (400), and the groove (140) is opened in the intermediate section (130).

8. The baffle of claim 7 wherein the maximum dimension of the notch of the groove (140) is d and the length of the intermediate section (130) in the axial direction of the rotating shaft (400) is L, wherein d is (0.01-0.6) L.

9. The flow guiding ring according to claim 7, wherein the shortest distance from the notch of the groove (140) to the inlet guide section (110) is e, and the length of the middle section (130) along the axial direction of the rotating shaft (400) is L, wherein e is (0.1-0.6).

10. The flow guiding ring according to any one of claims 2 to 6, wherein, in a radial direction of the flow guiding ring (100), a shortest distance from the axial flow fan blade (200) to the flow guiding ring (100) is d1, and a depth of the groove (140) is d2, wherein d2 is (0.02-0.6) d 1.

11. The deflector ring according to any of claims 2-6, wherein the surface of the groove (140) is smoothly transitioned and/or the connection between the groove opening of the groove (140) and the inner circumferential surface of the deflector ring (100) is smoothly transitioned.

12. An air conditioner, characterized in that it comprises a deflector ring (100) according to any one of claims 1 to 11.

13. The air conditioner as claimed in claim 12, further comprising an outlet grill (300), wherein the outlet grill (300) is installed on an outdoor unit panel and is adjacent to the outlet guide section (120) of the baffle ring (100);

the air outlet grille (300) comprises a plurality of annular ribs (320) which are concentrically arranged; the cross-section profile (121) of the outlet guide section (120) in the axial direction is an arc line, the tangent line of the cross-section profile (121) at the outlet of the guide ring (100) and the axial direction of the rotating shaft (400) form an included angle theta 1, the annular rib (320) and the axial direction of the rotating shaft (400) form an included angle theta 2, and the difference value between theta 1 and theta 2 is not more than 5 degrees.

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