Air guide ring capable of improving fan efficiency

Abstract

The utility model discloses an air guide ring capable of improving the efficiency of a fan, which comprises an air duct continuously arranged around the central axis of the air guide ring, a plurality of drainage grooves are uniformly distributed on the inner wall of the air duct, and the drainage grooves smoothly extend along the length direction of the air duct and are obliquely arranged relative to the central axis. According to the technical scheme, under the condition that the overall structure of the fan is not changed, the air volume loss is reduced only by changing the style of the air guide ring, the multiple inclined drainage grooves in the inner wall of the air duct are spirally distributed, airflow can be directionally guided, air resistance is reduced, the air volume is increased, turbulent flow interference is reduced, stable airflow conveying is ensured, and the service life of the fan is prolonged. And the overall efficiency of the fan is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to fan manufacturing technical field especially relates to a guide ring that can promote fan efficiency. BACKGROUND

[0002] Axial flow fan is widely used, and is a kind of equipment for ventilation and heat dissipation, and its working principle is that gas is guided and pushed by the rotation of fan blade to form axial flow mode, therefore, it is necessary to produce axial flow fan with low power consumption, fast heat dissipation, low noise and energy saving and environmental protection.

[0003] The guide ring of axial flow fan is one of five components of fan, and is part of panel, is usually connected to panel by die drawing or rivet mode, and is usually straight cylinder with two horn mouths at upper and lower, or with a ring rib in middle section to keep the roundness of air duct, how to design a reasonable and efficient guide ring plays a very important role in market competition of enterprise. SUMMARY

[0004] The utility model discloses a guide ring that can promote fan efficiency, and aims at solving the technical problem that the current guide ring is limited to improve the efficiency of axial flow fan.

[0005] To realize the above-mentioned purpose, the utility model provides a guide ring that can promote fan efficiency, which includes the air duct that is continuously arranged around the central axis, the inner wall of the air duct is uniformly provided with a plurality of drainage grooves, the drainage groove smoothly extends along the length direction, and is inclinedly arranged relative to the central axis.

[0006] Optionally, the included angle between the drainage groove and the central axis is 20-50 °.

[0007] Optionally, in the radial section of the air duct, the groove bottom of the drainage groove has the maximum inner diameter, and the groove opening of the drainage groove has the minimum inner diameter.

[0008] Optionally, in the radial section of the air duct, the groove opening and the groove bottom of the drainage groove are circularly connected.

[0009] Optionally, in the radial section of the air duct, the groove opening and the groove bottom of the drainage groove are circularly connected.

[0010] Optionally, in the radial section of the air duct, the groove opening and the groove bottom of the drainage groove are circularly connected.

[0011] Optionally, the wind cylinder extends smoothly from one end to the other end, and the extension direction is inclined relative to the central axis.

[0012] Optionally, the extension direction of the wind cylinder from one end to the other end is inclined by 1-2° relative to the central axis.

[0013] Optionally, the outer edges of the two ends of the wind cylinder extend radially outward to form a flow expansion portion.

[0014] Optionally, the flow expansion portion and the wind cylinder are connected by a circular arc.

[0015] In the technical scheme of the utility model, the loss of air volume is reduced only by changing the air guide ring style without changing the overall structure of the fan, the multiple inclined flow guide grooves on the inner wall of the wind cylinder are spirally distributed, the air flow is guided in a directional manner, the air resistance is reduced and the air volume is increased, and the overall efficiency of the fan is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained from the structure shown in the drawings without creative labor.

[0017] Figure 1 It is a front view of one embodiment of the air guide ring capable of improving the efficiency of the fan provided by the utility model;

[0018] Figure 2 It is a radial cross-sectional partial sectional view of Figure 1

[0019] Figure 3 It is an axial cross-sectional partial sectional view of Figure 1

[0020] Figure 4 It is a front view of another embodiment of the air guide ring capable of improving the efficiency of the fan provided by the utility model;

[0021] Figure 5 It is a sectional view of Figure 4

[0022] Figure 6 It is a radial cross-sectional partial sectional view of Figure 4

[0023] Label explanation: air guide ring-100, wind cylinder-1, central axis-1a, flow guide groove-11, groove bottom-112, slot-113, flow expansion portion-2. ​​​​

[0024] The implementation, functional features and advantages of the utility model will be further described in combination with embodiments with reference to the drawings. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0026] In order to better describe and illustrate the embodiments of the present application, one or more drawings can be referred to, but additional details or examples used to describe the drawings should not be considered as limiting the scope of any one of the invention, the presently described embodiments or the preferred mode of the present application.

[0027] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like are based on the position relationship shown in the drawings, and are only for the convenience of describing the present application, and therefore cannot be understood as limiting the present application.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application.

[0029] The air guide ring of the axial flow fan is one of the five components of the fan, and belongs to part of the panel. The air guide ring is usually connected to the panel by die stretching or rivet connection. The style is mostly straight cylinder with two horn mouths at the top and bottom, or with an annular rib in the middle section to maintain the roundness of the air duct. How to design a reasonable and efficient air guide ring plays a very important role in market competition for enterprises.

[0030] In view of this, the utility model provides a kind of air guide ring of fan efficiency promotion, Figures 1-3 , 4-6 are two embodiments of the air guide ring of fan efficiency promotion provided by the utility model, please refer to Figures 1-3 , 4-6, the air guide ring 100 is substantially annular structure, the annular structure has the air duct formed in the hollow portion of air duct 1 by continuously being arranged around central axis 1a, and the air duct 1.

[0031] Specifically, a plurality of guide grooves 11 are uniformly distributed on the inner wall of the air duct 1, the guide grooves 11 are formed by the outer recess of the inner wall of the air duct 1, the guide grooves 11 are substantially strip-shaped and smoothly extend along the length direction thereof. Each guide groove 11 is arranged obliquely relative to the central axis 1a and has the same oblique angle. The guide grooves 11 form a substantially spiral distribution on the inner wall of the air duct 1, which can accelerate the air inlet speed, convert kinetic energy into pressure energy, reduce dynamic pressure loss, and improve the overall efficiency of the fan; and can also optimize the integration path of airflows in different directions, improve the uniformity and stability of air inlet.

[0032] In the technical scheme of the utility model, without changing the overall structure of the fan, only by changing the guide ring 100 style, to reduce the loss of air volume, the plurality of obliquely arranged guide grooves 11 on the inner wall of the air duct 1 are spirally distributed, which can guide the airflow directionally, reduce the wind resistance and increase the air volume, and also reduce the turbulence interference, ensure the smooth conveying of airflow, and improve the overall efficiency of the fan.

[0033] As preferred, please refer to Figure 5 In an embodiment of the utility model, the included angle between the guide groove 11 and the central axis 1a is 20-50°, the smaller the angle, the lower the spiral degree, and the air volume is relatively concentrated; on the contrary, the larger the angle, the higher the spiral degree, and the air volume is more dispersed, and the angle can be set according to the specific application, and in the embodiment, the angle is preferably set to 31°.

[0034] It should be understood that, since the guide groove 11 is formed by the outer recess of the inner wall of the air duct 1, under the radial section of the air duct 1, the groove bottom 112 of the guide groove 11 has the maximum inner diameter, and the groove opening 113 of the guide groove 11 has the minimum inner diameter.

[0035] In order to improve the pressure bearing capacity of the air duct 1, please refer to Figure 2 and 6 In the two embodiments of the utility model, under the radial section of the air duct 1, the groove opening 113 and the groove bottom 112 of the guide groove 11 are connected in a circular arc shape.

[0036] Further, please refer to Figure 2 and 6 In the two embodiments of the utility model, under the radial section of the air duct 1, the groove opening 113 of one of the two adjacent guide grooves 11 and the groove opening 113 of the other are connected in a circular arc shape.

[0037] Still further, please refer to Figure 2In an embodiment of the utility model, on the radial section of the air cylinder 1, the groove bottom 112 of the flow guide groove 11 and the slot 113 on one side thereof, and the slot 113 on one side of the adjacent flow guide groove 11 are connected by the same circular arc, that is, the radius and the extension direction are the same, which makes the flow guide groove 11 deviate from the radial direction, thus having more spiral characteristics.

[0038] The above structure design, each connecting section is designed as a circular arc, the bending part is smoothly processed, so that the radial section of the whole air cylinder is approximately smooth and circular, and can better withstand pressure without deformation.

[0039] As preferred, please refer to Figure 3 In an embodiment of the utility model, the air cylinder 1 extends smoothly from one end to the other end, and the extension direction is inclined relative to the central axis 1a (parallel to the central axis).

[0040] Further, please refer to Figure 3 The extension direction of one end of the air cylinder 1 to the other end is inclined 1~2° relative to the central axis.

[0041] The above structure design, the wall of the air cylinder 1 is designed as 1~2° inclination, on the one hand, due to the recess design of the flow guide groove 11, the overall forming of the air cylinder 1 is facilitated, on the other hand, the air inlet is larger than the air outlet, which can realize the function of collecting air.

[0042] To introduce more fluid into the air cylinder 1, please refer to Figure 2 and 4 In the two embodiments of the utility model, the outer edge of one end of the air cylinder 1 extends radially outward to form an expansion part 2, and the expansion part 2 is in the shape of a horn.

[0043] As preferred, the expansion part 2 and the air cylinder 1 are connected by a circular arc, which improves the pressure bearing capacity; in addition, the flow guide groove 11 not only extends inside the air cylinder 1, but also extends on the expansion part 2, which can also guide the airflow around the air cylinder 1.

[0044] The above structure design further improves the air volume and introduces the air around the air duct.

[0045] As preferred, the outer edge of one end extends radially outward to form a mounting part (not shown in the figure), which is convenient for fixing with the panel.

[0046] The technical features of the above embodiments can be combined arbitrarily, in order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the description.

[0047] The above embodiments only express several implementation manners of the application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the application, a number of modifications and improvements can be made, which all belong to the protection scope of the application. Therefore, the protection scope of the patent of the application should be subject to the appended claims.

Claims

1. A wind guide ring capable of improving the efficiency of a fan, characterized in that, The wind tunnel comprises a plurality of wind tubes arranged continuously around a central axis, and the inner wall of each wind tube is uniformly provided with a plurality of flow guide grooves which extend smoothly along the length direction and are arranged obliquely relative to the central axis.

2. The fan efficiency improvement ring of Claim 1, wherein, The included angle between the flow guide groove and the central axis is 20-50°.

3. The fan efficiency improvement ring of Claim 1, wherein, In the radial cross section of the wind tunnel, the groove bottom of the flow guide groove has the maximum inner diameter, and the groove opening has the minimum inner diameter.

4. The fan efficiency improvement ring of claim 1 or 3, wherein, In the radial cross section of the wind tunnel, the groove opening and the groove bottom of the flow guide groove are connected by a circular arc.

5. The fan efficiency improvement ring of claim 1 or 3, wherein, In the radial cross section of the wind tunnel, the groove opening of one of the two adjacent flow guide grooves and the groove opening of the other are connected by a circular arc.

6. The fan efficiency improvement ring of claim 1 or 3, wherein, In the radial cross section of the wind tunnel, the groove bottom of the flow guide groove and the groove opening on one side thereof, and the groove opening on one side of the adjacent flow guide groove are connected by the same circular arc.

7. The fan efficiency improvement ring of Claim 1, wherein, The one end of the wind tunnel smoothly extends to the other end, and the extension direction is obliquely arranged relative to the central axis.

8. The fan efficiency improvement ring of Claim 7, wherein, The extension direction of the one end of the wind tunnel to the other end is obliquely arranged relative to the central axis by 1-2°.

9. The fan efficiency improvement ring of Claim 1, wherein, The outer edge of the two ends of the wind tunnel extends radially outward to form a flow expansion part.

10. The fan efficiency improvement ring of Claim 9, wherein, The flow expansion part and the wind tunnel are connected by a circular arc.

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