CN110671366A - Flow guide ring, fan and device with fan - Google Patents

Abstract

The invention provides a flow guide ring, a fan and a device with the fan, wherein the flow guide ring comprises: the air inlet part comprises an air inlet guide surface; the air outlet part extends from the air inlet part and comprises an air outlet guide surface; the boss extends out from one side of the air inlet part, which is back to the air inlet diversion surface, to the direction far away from the air inlet diversion surface; and the projection of the air outlet flow guide surface far away from one end of the air inlet flow guide surface in the radial outward direction of the flow guide ring falls on the air inlet part or the boss. Through setting up the boss to make the air-out water conservancy diversion face keep away from the one end of air inlet water conservancy diversion face, at the radial outside ascending projection of orientation along the water conservancy diversion circle, fall on air inlet portion or boss, when using water conservancy diversion circle and wind wheel cooperation, can prevent that the air current that is inhaled by the wind wheel from scurrying into the casing from the movement gap between wind wheel and the casing, or prevent that the air current that has got into in the casing from scurrying out the casing through the movement gap between wind wheel and the casing, thereby can effectively reduce the backward flow and the leakage that produce between wind wheel and the water conservancy diversion circle.

Description

Induction ring, fan and device with fan

technical field

The invention relates to the technical field of electrical appliances, in particular to a flow guide ring, a fan and a device having the fan.

Background technique

The guide ring is an important part of the air supply system of the centrifugal fan, and it mainly plays the role of guiding the airflow entering the volute of the centrifugal fan.

The traditional air-conditioning cabinet inner unit is used with the centrifugal fan to use the guide ring, and the profile line on the axial air inlet surface is in the form of a single arc, or a single arc plus a straight line. Its working surface is only at the inlet of the guide ring, whether it is on the inlet edge of the guide ring or at the outlet, it cannot change the wind field. The centrifugal volute of the fan has uneven air intake and uneven air outlet, which makes the centrifugal fan generate greater noise.

There is an existing air guide ring, which includes an air inlet part, an air outlet part and a boss, the air inlet part is connected with the air outlet part, and the air inlet part includes a first flow guide arc surface, and the air outlet part includes a second flow guide arc One end of the second flow guide arc surface is tangent to one end of the first flow guide arc surface, and the other end of the second flow guide arc surface is the air outlet end. The second diversion arc surface is a circular arc surface, and the circle center of the second diversion arc surface is defined as the second circle center, and there is an included angle β between the tangent point and the second circle center and the vertical axis, so that the first The two guide arc surfaces form a convex surface on the outer edge of the inlet of the guide ring. The plane where the center axis of the guide ring is located cuts the guide ring into a cross section, and in the cross section, there is an angle α between the connection line between the air outlet end of the second guide arc surface and the second center of the circle and the horizontal axis, so that the first The two guide arc surfaces form a convex surface at the outlet of the guide ring. The above-mentioned diversion ring is provided with a first diversion arc surface and a second diversion arc surface, and the second diversion arc surface forms a convex surface on the outer edge of the inlet of the diversion ring and the outlet of the diversion ring, which enhances the guiding effect. The flow ring flows at the outer edge of the inlet and the wall surface of the outlet, so that the air inlet and outlet of the centrifugal fan can be relatively uniform.

However, because there is a certain movement gap between the centrifugal wind wheel and the wall of the volute, the above-mentioned guide ring may cause the airflow sucked by the centrifugal wind wheel to enter the volute from the movement gap, and the airflow that has entered the volute will pass through the movement. When the gap escapes the volute, a large backflow and leakage occur between the wind wheel and the guide ring.

SUMMARY OF THE INVENTION

Therefore, the technical problem to be solved by the present invention is to overcome the defect of large backflow and leakage between the current diversion coil and the wind rotor in the prior art when it is installed on the fan, so as to provide a system that can reduce the amount of contact with the wind rotor. Induction coils, fans and devices with fans for backflow and leakage generated between them.

The present invention provides a guide coil, comprising:

The air inlet part, including the air inlet guide surface;

an air outlet part, which is extended from the air inlet part and includes an air outlet guide surface;

The boss extends out from the side of the air inlet part facing away from the air inlet guide surface, and extends in a direction away from the air inlet guide surface; and the air outlet guide surface is far away from the air inlet The projection of one end of the guide surface in the radially outward direction of the guide ring falls on the air inlet part or the boss.

The boss is an annular structure.

The extension length L0 of the boss in the direction away from the air inlet guide surface satisfies, L0=5mm.

It also includes an installation part, the air inlet part extends from the installation part to the direction close to the axis of the guide ring, and during the extending process, the distance between the air inlet guide surface and the boss gradually increases. increase.

The air outlet portion includes a first air outlet section, and the air outlet guide surface includes a first air outlet surface disposed on the first air outlet section; the first air outlet section is formed by the air inlet portion. It extends in a direction close to the axial center of the guide ring, and during the extending process, the distance between the first air outlet surface and the boss gradually decreases.

The air outlet further includes a second air outlet section, and the air outlet guide surface further includes a second air outlet surface disposed on the second air outlet section; the second air outlet section is formed by the first air outlet. An air outlet section extends in a direction away from the axial center of the diversion ring, and during the extending process, the distance between the second air outlet surface and the boss gradually decreases.

The air inlet guide surface, the first air outlet surface and the second air outlet surface are all arc surfaces.

The diameter of the intersection of the air inlet guide surface and the first air outlet surface is D1, the diameter of the end of the second air outlet surface away from the first air outlet surface is D2, and the first air outlet surface has a diameter of D2. The diameter of the intersection of the surface and the second air outlet surface is D3, then the relationship between D1, D2 and D3 is satisfied, D1>D2>D3.

Between D1 and D3, 15mm≤D1-D3≤20mm.

Between D2 and D3, 2mm≤D2-D3≤5mm.

The length of the air outlet part in the axial direction of the guide ring is L1, the length of the air inlet part in the axial direction of the guide ring is L2, and the length of the second air outlet section in the axial direction of the guide ring is L3, then L1, L2 and L3 satisfy, L1>L2>L3.

L1 satisfies, 10mm≤L1≤15mm, and/or,

L2 satisfies, 8mm≤L2≤10mm, and/or,

L3 is satisfied, 2mm≤L3≤5mm.

The present invention also provides a fan, including the above-mentioned flow guide ring, and a wind wheel.

The present invention also provides a fan, comprising the above-mentioned guide ring and a wind wheel; the inner diameter of the wind wheel is D4 and the outer diameter is D5, then,

between D4 and D3, D3 > D4, and/or,

Between D5 and D1, D1>D5.

D3, D4 and D5 satisfy, (D5-D4)/3≤D5-D3≤2(D5-D4)/3.

Between D1 and D5, 4mm≤D1-D5≤6mm.

The inner diameter of the boss is D6, then, between D6 and D5, D6>D5 is satisfied.

Between D6 and D5, 10mm≤D6-D5≤15mm.

The distance between the end of the boss away from the air inlet part and the end face of the wind rotor is S, then S satisfies, 2mm≤S≤4mm.

The fan is a centrifugal fan, and the wind wheel is a centrifugal wind wheel.

The present invention also provides a device with a fan, including the above-mentioned fan.

The device with a fan is an indoor unit of an air conditioner.

The technical scheme of the present invention has the following effects:

1. The guide ring provided by the present invention includes: an air inlet part, including an air inlet guide surface; an air outlet part, extending from the air inlet part and including an air outlet guide surface; The side of the air inlet part facing away from the air inlet guide surface extends out in a direction away from the air inlet guide surface; and the end of the air outlet guide surface away from the air inlet guide surface , the projection on the radially outward direction of the guide ring falls on the air inlet part or the boss. By arranging a boss, and making the end of the air outlet guide surface away from the air inlet guide surface, the projection on the radially outward direction of the guide ring falls on the air inlet part or the boss When using the guide ring with the wind wheel, it can prevent the airflow sucked by the wind wheel from entering the casing from the movement gap between the wind wheel and the casing, or prevent the airflow that has entered the casing from passing through the wind wheel. The movement gap between the casing and the casing escapes the casing, thereby effectively reducing the backflow and leakage between the wind wheel and the guide ring.

2. In the guide ring provided by the present invention, the extension length L0 of the boss in the direction away from the air inlet guide surface satisfies 3mm<L0≤5mm. In this way, when the guide ring is used in conjunction with the wind wheel, the backflow of the air flow can be more effectively prevented.

3. In the guide ring provided by the present invention, the diameter of the intersection of the air inlet guide surface and the first air outlet surface is D1, and the diameter of the end of the second air outlet surface away from the first air outlet surface is D1. The diameter is D2, and the diameter of the intersection of the first air outlet surface and the second air outlet surface is D3, then D1, D2, and D3 satisfy, D1>D2>D3. In this way, when the guide ring is used in conjunction with the wind rotor, a uniform airflow velocity field and pressure field can be established in front of the inlet of the wind rotor, and the characteristics of the airflow field in the fan can be improved.

4. The fan provided by the present invention includes the above-mentioned guide ring and a wind wheel; the inner diameter of the wind wheel is D4, and the outer diameter is D5, then, between D4 and D3, D3>D4, and/or, D5 and D1, D1>D5. In this way, when the guide ring is used in conjunction with the wind wheel, the flow can be better guided and the air flow can be prevented from flowing back and leaking.

5. In the fan provided by the present invention, the distance between the end of the boss away from the air inlet part and the end face of the wind wheel is S, then S satisfies, 2mm≤S≤4mm. In this way, when the guide ring is used in conjunction with the wind wheel, the backflow of the air flow can be more effectively prevented.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

Fig. 1 is the partial perspective sectional schematic diagram of the flow guide coil provided in the first embodiment of the present invention;

Fig. 2 is a partial perspective cross-sectional schematic diagram of the guide coil provided in the first embodiment of the present invention;

Fig. 3 is the enlarged schematic diagram of A area in Fig. 2;

4 is a schematic perspective cross-sectional view of the fan provided in the first embodiment of the present invention;

Fig. 5 is the enlarged schematic diagram of B region in Fig. 4;

Fig. 6 is the structural representation of the wind wheel in the blower shown in Fig. 4;

Description of reference numbers:

1-Air inlet part, 11-Air inlet guide surface, 2-Boss, 3-Installation part, 4-First air outlet section, 41-First air outlet surface, 5-Second air outlet section, 51- The second air outlet, 6-wind wheel.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

As shown in FIGS. 1-6 , this embodiment provides an air guide ring, which includes an air inlet part 1 , an air outlet part and a boss 2 .

The air inlet portion 1 includes an air inlet guide surface 11 .

The air outlet part is extended from the air inlet part 1 and includes an air outlet guide surface.

The boss 2 extends from the side of the air inlet part 1 that faces away from the air inlet guide surface 11 and extends away from the air inlet guide surface 11; The projection on the radially outward direction of the guide ring falls on the air inlet part 1 or the boss 2 .

By arranging the boss 2 and making the end of the air outlet guide surface far away from the air inlet guide surface 11, the projection on the radially outward direction of the guide ring falls on the air inlet part 1 or the other end. On the boss 2, when the guide ring is used in conjunction with the wind wheel 6, it can prevent the airflow sucked by the wind wheel 6 from entering the casing from the movement gap between the wind wheel 6 and the casing, or prevent the air flow from entering the casing. The airflow in the casing escapes the casing through the movement gap between the fan wheel 6 and the casing, thereby effectively reducing the backflow and leakage between the fan wheel 6 and the guide ring.

The specific structural form of the boss 2 is not limited. In this embodiment, the boss 2 is an annular structure.

The extension length of the boss 2 in the direction away from the air inlet guide surface 11 is L0. In order to more effectively prevent the airflow from backflow when the guide ring is used in conjunction with the wind wheel 6, preferably L0 satisfies, 3mm<L0≤5mm. Specifically, L0 in this embodiment satisfies, L0=5mm.

The diversion ring provided in this embodiment further includes an installation part 3, and the air inlet part 1 extends from the installation part 3 to the direction close to the axis of the diversion ring, and during the extending process, the air inlet guide surface 11 and the boss are The distance between 2 gradually increases.

The air outlet part includes a first air outlet section 4, and the air outlet guide surface includes a first air outlet surface 41 arranged on the first air outlet section 4; The distance between the first air outlet surface 41 and the boss 2 gradually decreases during the extending process.

The air outlet part also includes a second air outlet section 5, and the air outlet guide surface also includes a second air outlet surface 51 arranged on the second air outlet section 5; The direction extending away from the axial center of the guide ring, and during the extending process, the distance between the second air outlet surface 51 and the boss 2 gradually decreases.

The air inlet guide surface 11 , the first air outlet surface 41 and the second air outlet surface 51 are all arc surfaces. Specifically, in this embodiment, the air inlet guide surface 11 , the first air outlet surface 41 and the second air outlet surface 51 are all arc surfaces.

The diameter of the intersection of the air inlet guide surface 11 and the first air outlet surface 41 is D1, and the diameter of the end of the second air outlet surface 51 away from the first air outlet surface 41 is D2. The diameter of the intersection of the wind surface 51 is D3, then D1, D2, and D3 satisfy, D1>D2>D3. In this way, when the guide ring is used in conjunction with the wind wheel 6, a uniform airflow velocity field and pressure field can be established in front of the inlet of the wind wheel 6, and the characteristics of the airflow field in the fan can be improved.

Specifically, in this embodiment, between D1 and D3, 15mm≤D1-D3≤20mm is satisfied. Between D2 and D3, 2mm≤D2-D3≤5mm.

The length of the air outlet part in the axial direction of the guide ring is L1, the length of the air inlet part 1 in the axial direction of the guide ring is L2, and the length of the second air outlet 5 in the axial direction of the guide ring is L3, then L1, L2 and L3 satisfy, L1>L2>L3.

Specifically, in this embodiment, L1 satisfies, 10mm≤L1≤15mm; and/or, L2 satisfies, 8mm≤L2≤10mm; and/or, L3 satisfies, 2mm≤L3≤5mm.

This embodiment also provides a centrifugal fan, including the above-mentioned flow guide ring, a fan wheel 6 and a casing. Wherein, the guide ring is installed on the casing through the installation part 3, and the fan wheel 6 is installed in the casing.

Among them, the inner diameter of the wind wheel 6 is D4, and the outer diameter is D5. In order to better guide the flow and prevent the air flow from backflow and leakage when the guide ring is used in conjunction with the wind wheel 6, D4 and D3 in this embodiment are between D3>D4; and/or, between D5 and D1, D1>D5.

Specifically, between D3, D4, and D5, D5-D4/3≤D5-D3≤2D5-D4/3; and/or, between D1 and D5, 4mm≤D1-D5≤6mm.

The inner diameter of the boss 2 is D6, then, between D6 and D5, D6>D5 is satisfied. Specifically, in this embodiment, 10mm≤D6-D5≤15mm.

The distance between the boss 2 and the end face of the wind wheel 6 is S, which is far away from the end of the air inlet part 1. In order to use the guide ring with the wind wheel 6, the air flow can be more effectively prevented from backflow. In this embodiment Among them, S satisfies, 2mm≤S≤4mm.

The specific form of the fan is not limited. The fan in this embodiment is a centrifugal fan. Correspondingly, the wind wheel 6 is a centrifugal wind wheel 6, and the casing is a volute.

This embodiment also provides an indoor unit of an air conditioner, including the above-mentioned fan. As an alternative embodiment, the indoor unit of the air conditioner can also be replaced with other devices having a fan, such as the outdoor unit of the air conditioner or a range hood.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (22)

1. A flow directing collar, comprising:

the air inlet part (1) comprises an air inlet guide surface (11);

the air outlet part extends from the air inlet part (1) and comprises an air outlet guide surface;

the boss (2) extends out from one side of the air inlet part (1) back to the air inlet guide surface (11) to the direction far away from the air inlet guide surface (11); and the projection of the air outlet guide surface far away from one end of the air inlet guide surface (11) in the radial outward direction of the guide ring falls on the air inlet part (1) or the boss (2).

2. The deflector ring according to claim 1, wherein the boss (2) is of an annular structure.

3. The deflector ring according to claim 1 or 2, wherein the extension length L0 of the boss (2) in the direction away from the air inlet deflector surface (11) is 3mm < L0 ≤ 5 mm.

4. The flow guide ring according to claim 1 or 2, further comprising an installation part (3), wherein the air inlet part (1) extends from the installation part (3) to a direction close to the axis of the flow guide ring, and in the extending process, the distance between the air inlet flow guide surface (11) and the boss (2) is gradually increased.

5. The deflector ring according to claim 4, wherein the air outlet portion comprises a first air outlet section (4), and the air outlet deflector surface comprises a first air outlet surface (41) arranged on the first air outlet section (4); the first air outlet section (4) extends from the air inlet part (1) to the direction close to the axis of the flow guide ring, and the distance between the first air outlet surface (41) and the boss (2) is gradually reduced in the extending process.

6. The deflector ring according to claim 5, wherein the air outlet portion further comprises a second air outlet section (5), and the air outlet deflector surface further comprises a second air outlet surface (51) provided on the second air outlet section (5); the second air outlet section (5) extends from the first air outlet section (4) to the direction far away from the axis of the flow guide ring, and in the extending process, the distance between the second air outlet surface (51) and the boss (2) is gradually reduced.

7. The deflector ring according to claim 6, wherein the air inlet deflector surface (11), the first air outlet surface (41) and the second air outlet surface (51) are all cambered surfaces.

8. The deflector according to claim 7, wherein the diameter of the intersection of the air inlet deflector surface (11) and the first air outlet surface (41) is D1, the diameter of the end of the second air outlet surface (51) far away from the first air outlet surface (41) is D2, and the diameter of the intersection of the first air outlet surface (41) and the second air outlet surface (51) is D3, then D1, D2 and D3 are satisfied, and D1 > D2 > D3.

9. The deflector ring of claim 8, wherein D1 and D3 satisfy, 15mm ≦ D1-D3 ≦ 20 mm.

10. The deflector ring of claim 8, wherein D2 and D3 satisfy 2mm ≦ D2-D3 ≦ 5 mm.

11. The flow guide ring of claim 6, wherein the length of the air outlet part in the axial direction of the flow guide ring is L1, the length of the air inlet part (1) in the axial direction of the flow guide ring is L2, and the length of the second air outlet section (5) in the axial direction of the flow guide ring is L3, so that L1, L2 and L3 are satisfied, and L1 > L2 > L3.

12. The baffle of claim 11,

l1 satisfies, 10 mm. ltoreq. L1. ltoreq.15 mm, and/or,

l2 satisfies, 8 mm. ltoreq. L2. ltoreq.10 mm, and/or,

l3 satisfies that L3 is more than or equal to 2mm and less than or equal to 5 mm.

13. A wind turbine, characterized in that it comprises a guide ring according to any of claims 1-12, and a wind wheel (6).

14. A wind turbine, characterized by comprising a guide ring according to any of claims 8-10, and a wind wheel (6); the inner diameter of the wind wheel (6) is D4, the outer diameter is D5,

d4 and D3, D3 > D4, and/or,

d5 and D1, D1 > D5.

15. The fan set forth in claim 14 wherein (D5-D4)/3 ≦ D5-D3 ≦ 2(D5-D4)/3 is satisfied between D3, D4, and D5.

16. The fan of claim 14 wherein D1 and D5 satisfy, 4mm ≦ D1-D5 ≦ 6 mm.

17. The fan as claimed in claim 14, wherein the boss (2) has an inner diameter D6, such that D6 > D5 is satisfied between D6 and D5.

18. The fan of claim 17, wherein D6 and D5 satisfy, 10mm ≦ D6-D5 ≦ 15 mm.

19. The fan according to claim 13, wherein the distance between the end of the boss (2) far away from the air inlet part (1) and the end surface of the wind wheel (6) is S, and S is satisfied, and S is larger than or equal to 2mm and smaller than or equal to 4 mm.

20. The wind turbine according to any of claims 13-19, characterized in that the wind turbine is a centrifugal wind turbine and the wind turbine (6) is a centrifugal wind turbine (6).

21. An apparatus having a fan, comprising a fan as claimed in any one of claims 13 to 20.

22. The device with a blower of claim 21, wherein the device with a blower is an air conditioner indoor unit.

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