Axial fan and side-blowing outdoor unit

Abstract

The utility model relates to the technical field of air conditioners, in particular to an axial flow fan and a side-blowing outdoor unit. The axial flow fan comprises an axial flow impeller and a flow guide ring; the flow guide ring surrounds the air outlet side of the axial flow impeller, an air inlet and an air outlet of the flow guide ring are horn-shaped, and a flow guide groove is formed in the inner wall of the air outlet of the flow guide ring. The side-blowing outdoor unit comprises an axial fan. According to the axial flow fan and the side-blowing outdoor unit, the flow guide groove is formed in the inner wall of the air outlet side of the flow guide ring, turbulence generated by airflow near the air outlet of the flow guide ring can be restrained, the efficiency of a motor can be improved, and noise can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning technical field, specifically, relate to a kind of axial fan and side-blow outdoor unit. BACKGROUND

[0002] The side-blow outdoor unit of split air conditioner is generally equipped with semi-open axial fan, and the semi-open axial fan is mainly composed of axial impeller, flow guide ring surrounding only the air outlet side of axial impeller and motor running axial impeller, which can not only promote air flow from the upstream of air inlet side, but also promote air flow from the periphery of air inlet side. The air inlet and air outlet of flow guide ring are trumpet-shaped, and the inner wall is sharply bent, which causes the air flow sucked from the periphery of air inlet side to be easily turbulent near the air outlet when flowing along the inner wall of flow guide ring, resulting in not only a large noise, but also a low motor efficiency. SUMMARY

[0003] The utility model aims at providing a kind of axial fan and side-blow outdoor unit to alleviate the technical problems of large noise and low motor efficiency in prior art.

[0004] The axial fan provided by the utility model comprises an axial impeller and a flow guide ring.

[0005] The flow guide ring surrounds the air outlet side of the axial impeller, and the air inlet and air outlet of the flow guide ring are trumpet-shaped, and the inner wall of the air outlet of the flow guide ring is provided with a flow guide groove.

[0006] Compared with the prior art, the utility model has the beneficial effects that:

[0007] During operation, the air flow sucked from the periphery of air inlet side can flow from inside to outside along the inner wall of flow guide ring, and since the inner wall of the air outlet of flow guide ring is provided with a flow guide groove, when the air flow flows to the vicinity of the air outlet of flow guide ring, the air flow close to the flow guide ring will enter the flow guide groove and flow rapidly from inside to outside towards the periphery, and at the same time, the air flow slightly far from the flow guide ring will be attracted by the air flow in the flow guide groove, so that the air flow can also flow along the flow guide ring towards the periphery, thereby inhibiting the turbulence of air flow near the air outlet of flow guide ring due to stripping of flow guide ring, improving the efficiency of motor in axial fan, and reducing noise.

[0008] Therefore, the axial fan provided by the utility model can inhibit the turbulence of air flow near the air outlet of flow guide ring by providing a flow guide groove on the inner wall of air outlet side of flow guide ring, improve the efficiency of motor, and reduce noise. In addition, the air flow flowing near the air outlet of flow guide ring can be obliquely diffused while smoothly decelerating, which can improve the conversion performance of dynamic pressure to static pressure of axial fan, and further improve the air supply performance and static pressure efficiency.

[0009] Preferably, as an implementation manner, the plurality of flow guide grooves are arranged along the circumferential direction of the flow guide ring.

[0010] The beneficial effect is that the turbulence of the air flow near the air outlet of the flow guide ring can be inhibited.

[0011] Preferably, as an implementation manner, the width of the groove of the flow guide groove is uniform from inside to outside.

[0012] The beneficial effect is that the flow guiding effect of the flow guide groove on the air flow is ensured.

[0013] Preferably, as an implementation manner, the width of the groove of the flow guide groove ranges from 4mm to 8mm.

[0014] And / or, the ratio of the distance between the two adjacent flow guide grooves to the width of the groove of the flow guide groove ranges from 1 to 2.

[0015] The beneficial effect is that the turbulence of the air flow near each position of the air outlet of the flow guide ring can be effectively inhibited.

[0016] Preferably, as an implementation manner, the center of symmetry of the flow guide groove coincides with the center of the flow guide ring.

[0017] The beneficial effect is that no matter which direction the axial impeller rotates, the air flow close to the flow guide ring can enter the flow guide groove and flow outward from the inside to the outside of the flow guide groove, which has strong adaptability.

[0018] Preferably, as an implementation manner, the flow guide groove is inclined from the inside to the outside to the rotation direction of the axial impeller.

[0019] The beneficial effect is that the turbulence of the air flow near the air outlet of the flow guide ring can be better inhibited.

[0020] Preferably, as an implementation manner, the inclination angle of the flow guide groove ranges from 25° to 65°.

[0021] The beneficial effect is that the turbulence of the air flow near the air outlet of the flow guide ring can be well inhibited.

[0022] Preferably, as an implementation manner, one end of the flow guide groove is close to the narrowest part of the middle of the flow guide ring, and the other end is close to the edge of the air outlet of the flow guide ring.

[0023] The beneficial effect is that the flow guiding effect of the flow guide groove can be improved.

[0024] Preferably, as an implementable mode, the air outlet of the flow guide ring is blocked by an air outlet grille, side edges of the air outlet grille are provided with openings, and one of the openings is flush with the air outlet end of the flow guide ring.

[0025] The beneficial effect is that the turbulence of the airflow when passing through the openings of the air outlet grille can be greatly reduced.

[0026] The side-blowing outdoor unit provided by the utility model comprises a front plate and the axial flow fan, the front plate is provided with a window, the flow guide ring is installed at the window of the front plate, and the air outlet end of the flow guide ring is smoothly connected with the front plate.

[0027] The beneficial effect is that the side-blowing outdoor unit provided by the utility model comprises the axial flow fan, so all advantages of the axial flow fan are possessed, and the description of the advantages is not repeated here. In addition, the air outlet end of the flow guide ring is smoothly connected with the front plate, so that the airflow can keep smooth flowing when flowing along the inside of the flow guide ring to the joint of the flow guide ring and the front plate, and the airflow turbulence at the joint of the flow guide ring and the front plate is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0028] 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 following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only the embodiments of the utility model, and other drawings can be obtained by the provided drawings without creative labor for the ordinary skilled in the art.

[0029] Figure 1 The partial cross-sectional structure schematic view of the side-blowing outdoor unit provided by the utility model embodiment is shown in the figure.

[0030] Figure 2 The front view structure schematic view of the axial flow fan provided by the utility model embodiment is shown in the figure.

[0031] Figure 3 The partial airflow flow schematic view of the side-blowing outdoor unit provided by the utility model embodiment is shown in the figure.

[0032] Figure 4 The partial airflow flow schematic view of the axial flow fan provided by the utility model embodiment is shown in the figure.

[0033] Figure 5 The front view schematic view of another structure of the axial flow fan provided by the utility model embodiment is shown in the figure.

[0034] Figure 6 The partial airflow flow schematic view of another structure of the axial flow fan provided by the utility model embodiment is shown in the figure.

[0035] Explanation of reference signs:

[0036] 100 - axial impeller;

[0037] 200 - guide ring; 210 - guide groove;

[0038] 300 - motor;

[0039] 400 - air outlet grille; 410 - opening;

[0040] 500 - front plate. DETAILED DESCRIPTION

[0041] The technical solutions of the present application will be described clearly and completely in conjunction with the drawings. Obviously, the described embodiments are only some 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 labor fall within the scope of the present application.

[0042] The present application will be described in further detail below with reference to specific examples and in conjunction with the drawings.

[0043] Referring to Figures 1-6 The present embodiment provides an axial fan, which comprises an axial impeller 100 and a guide ring 200. The guide ring 200 is arranged around the air outlet side of the axial impeller 100. The air inlet and the air outlet of the guide ring 200 are both in the shape of a horn. The inner wall of the air outlet of the guide ring 200 is provided with a guide groove 210.

[0044] During operation, the airflow sucked in from the air inlet side of the axial impeller 100 can flow from inside to outside along the inner wall of the guide ring 200. Since the guide groove 210 is arranged on the inner wall of the air outlet of the guide ring 200, when the airflow F1 and F2 flows to the vicinity of the air outlet of the guide ring 200, the airflow F1 close to the guide ring 200 will enter the guide groove 210 and flow from inside to outside along the guide groove 210 towards the outer periphery. At the same time, the airflow F2 slightly far away from the guide ring 200 will be attracted by the airflow F1 in the guide groove 210, so that this part of the airflow F2 can also flow along the guide ring 200 towards the outer periphery. Thus, the turbulence of the airflow caused by the stripping of the guide ring 200 near the air outlet of the guide ring 200 can be inhibited, the efficiency of the motor 300 in the axial fan can be improved, and the noise can be reduced.

[0045] Therefore, the axial fan provided by the present embodiment can inhibit the turbulence of the airflow near the air outlet of the guide ring 200, improve the efficiency of the motor 300, and reduce the noise. In addition, the airflow flowing near the air outlet of the guide ring 200 can be diffused obliquely while slowing down smoothly, which can improve the conversion performance of the dynamic pressure to the static pressure of the axial fan, and further improve the air supply performance and the static pressure efficiency.

[0046] Specifically, referring to Figure 2 and Figure 5 , the guide grooves 210 can be arranged in multiple numbers and spaced along the circumferential direction of the guide ring 200, so that the guide grooves 210 can guide the air flow to multiple positions of the circumferential direction of the guide ring 200, so as to effectively suppress the turbulence of the air flow generated near the air outlet of the guide ring 200, and effectively improve the efficiency of the motor 300, reduce the noise, and effectively improve the conversion performance of the dynamic pressure to the static pressure of the axial fan.

[0047] Further, the multiple guide grooves 210 can be uniformly arranged along the circumferential direction of the guide ring 200, so as to as far as possible suppress the turbulence of the air flow generated near each position of the air outlet of the guide ring 200.

[0048] Preferably, the width of the slot of the guide groove 210 from inside to outside is uniform, so as to ensure the guiding effect of the guide groove 210 on the air flow and effectively suppress the turbulence generated on the air outlet side of the guide ring 200 due to air flow separation. The inner end of the guide groove 210 is the end of the guide groove 210 close to the inner side of the guide ring 200, and the outer end of the guide groove 210 is the end of the guide groove 210 close to the outer side of the guide ring 200. Two side edges of the slot of the guide groove 210 extending from inside to outside are defined as reference side edges, the two reference side edges are opposite to each other, and the width of the slot of the guide groove 210 is the distance between the two reference side edges of the slot of the guide groove 210.

[0049] Specifically, the width H of the slot of the guide groove 210 can be set to 4-8mm, within this range, the guide groove 210 has good guiding effect on the air flow, and can effectively suppress the turbulence generated on the air outlet side of the guide ring 200 due to air flow separation.

[0050] The ratio of the distance J between the two adjacent guide grooves 210 to the width H of the slot of the guide groove 210 can be set to 1-2, within this range, the turbulence of the air flow generated near each position of the air outlet of the guide ring 200 can be effectively suppressed.

[0051] As an implementable manner, referring to Figures 2-4 , the center symmetry line of the guide groove 210 can be set to coincide with the center of the guide ring 200, which is equivalent to that the guide groove 210 is arranged radially in the inner wall of the air outlet of the guide ring 200, in this manner, no matter which direction the axial impeller 100 rotates, the air flow F1 close to the guide ring 200 can enter the guide groove 210 and flow outward from the inner to the outer of the guide groove 210, which has strong adaptability.

[0052] As another implementable manner, referring to Figure 5 and Figure 6The guide groove 210 can be arranged to be inclined from inside to outside in the rotation direction of the axial impeller 100. When the axial impeller 100 rotates in the predetermined direction, the airflow F1 close to the guide ring 200 can quickly enter the guide groove 210 and flow from inside to outside along the guide groove 210 to the periphery, so that the airflow turbulence generated near the air outlet of the guide ring 200 can be better inhibited. In fact, the guide ring 200 has a plurality of radial lines L1 corresponding to the plurality of guide grooves 210. The edge of the guide groove 210 close to the guide ring 200, the center symmetry line L2 of the guide groove 210 and the corresponding radial line L1 intersect at a point. The center symmetry line L2 of the plurality of guide grooves 210 is arranged to be inclined from inside to outside in the rotation direction of the axial impeller 100.

[0053] Preferably, the inclination angles of the plurality of guide grooves 210 can be uniformly arranged, which is better for the guide effect and convenient for processing.

[0054] Preferably, the inclination angle θ of the guide groove 210 is arranged to be in the range of 25°-65°. In this way, when the axial impeller 100 rotates in the predetermined direction, the airflow F1 close to the guide ring 200 can smoothly enter the guide groove 210 and flow from inside to outside along the guide groove 210 to the periphery, so that the airflow turbulence generated near the air outlet of the guide ring 200 can be well inhibited.

[0055] Preferably, referring to Figure 1 and Figure 3 One end of the guide groove 210 is arranged close to the middle narrowest part of the guide ring 200, and the other end of the guide groove 210 is arranged close to the air outlet edge of the guide ring 200. In this way, the length of the guide groove 210 from inside to outside is maximized, and the guide effect of the guide groove 210 can be improved.

[0056] In addition, referring to Figure 1 and Figure 3The air outlet of the flow guide ring 200 can be blocked by the air outlet grille 400, and the air outlet grille 400 is provided with an opening 410 at the side edge, and at least one opening 410 is arranged flush with the air outlet end of the flow guide ring 200, that is, there is an opening 410 at the end of the side edge of the air outlet grille 400 close to the flow guide ring 200. In this way, the air flow close to the flow guide ring 200 (including the air flow F1 flowing out of the flow guide groove 210, and the air flow F2 close to the flow guide ring 200 but attracted by the air flow F1 in the flow guide groove 210) can smoothly blow out through the opening 410 flush with the air outlet end of the flow guide ring 200. Since the opening 410 is flush with the air outlet end of the flow guide ring 200, the air flow will not be blocked when flowing through the opening, thereby ensuring the smoothness of the air flow, and greatly reducing the turbulence of the air flow when flowing through the opening 410 of the air outlet grille 400. The opening 410 flush with the air outlet end of the flow guide ring 200 can be multiple and arranged at intervals in the circumferential direction.

[0057] Of course, there is also an opening 410 at the part of the air outlet grille 400 opposite the air outlet of the flow guide ring 200 for air flow to blow out.

[0058] Referring to Figure 1 and Figure 3 The embodiment also provides a side-blowing outdoor unit, which comprises a front plate 500 and the above-mentioned axial flow fan 100, the front plate 500 is provided with a window, the flow guide ring 200 is installed at the window of the front plate 500, and the air outlet end of the flow guide ring 200 is smoothly connected with the front plate 500.

[0059] The side-blowing outdoor unit provided by the embodiment has all the advantages of the above-mentioned axial flow fan, and details are not repeated here. In addition, the air outlet end of the flow guide ring 200 is smoothly connected with the front plate 500, so that the air flow can smoothly flow when flowing along the inside of the flow guide ring 200 to the joint of the flow guide ring 200 and the front plate 500, avoiding turbulence of the air flow at the joint of the flow guide ring 200 and the front plate 500.

[0060] In summary, the utility model embodiment discloses a kind of axial flow fan and side-blowing outdoor unit, which overcomes the technical problems existing in traditional side-blowing outdoor unit, such as large noise, low motor efficiency. The axial flow fan and side-blowing outdoor unit provided by the embodiment of the utility model, by being provided with flow guide groove 210 in the outflow side inner wall of flow guide ring 200, air flow generated near the air outlet of flow guide ring 200 can be inhibited, the efficiency of motor 300 can be improved, and noise can be reduced. In addition, the air flow flowing near the air outlet of flow guide ring 200 can be diffused obliquely while slowing down smoothly, the conversion performance of dynamic pressure to static pressure of axial flow fan can be improved, and then the air supply performance and static pressure efficiency are improved.

[0061] In the description of the utility model, it is necessary to explain, unless another definite provision and limit, the term "installation" should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication.For the ordinary skilled person in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0062] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the utility model, but not limited to them;Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features;And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. An axial flow fan characterised in that, The axial flow impeller (100) and the guide circle (200) are included. The guide circle (200) surrounds the air outlet side of the axial flow impeller (100), the air inlet and the air outlet of the guide circle (200) are both in the shape of a horn, and the inner wall of the air outlet of the guide circle (200) is provided with a guide groove (210).

2. The axial fan according to claim 1, characterized in that The guide groove (210) is multiple, and the multiple guide grooves (210) are arranged along the circumference of the guide circle (200).

3. The axial fan according to claim 2, characterized in that The width of the slot of the guide groove (210) is consistent from inside to outside.

4. The axial fan according to claim 3, characterized in that The width of the slot of the guide groove (210) ranges from 4mm to 8mm. The ratio of the distance between the adjacent two guide grooves (210) to the width of the slot of the guide groove (210) ranges from 1 to 2.

5. The axial fan according to claim 1, wherein The center symmetry line of the guide groove (210) coincides with the center of the guide circle (200).

6. The axial fan according to claim 1, wherein The guide groove (210) is inclined from inside to outside towards the rotation direction of the axial flow impeller (100).

7. The axial fan according to claim 6, characterized in that The inclination angle of the guide groove (210) ranges from 25° to 65°.

8. The axial fan according to claim 1, wherein One end of the guide groove (210) is close to the narrowest part of the middle of the guide circle (200), and the other end is close to the edge of the air outlet of the guide circle (200).

9. The axial fan according to any one of claims 1-8, characterized in that The air outlet of the guide circle (200) is blocked by an air outlet grille (400), the side of the air outlet grille (400) is provided with an opening (410), and one of the openings (410) is flush with the air outlet end of the guide circle (200).

10. A side-blown outdoor unit, characterized by, The front plate (500) is provided with a window, the guide circle (200) is installed at the window of the front plate (500), and the air outlet end of the guide circle (200) is smoothly connected with the front plate (500).

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