Cross-flow fan and air conditioner

Abstract

The utility model provides a cross-flow fan and an air conditioner, comprising: a fan blade assembly comprising a plurality of fan blades arranged in an annular shape, the plurality of fan blades enclose to form a diversion cavity with a closed periphery and two open opposite ends; the end cover is connected to the multiple fan blades and used for sealing one end of the flow guide cavity, the end face, facing the flow guide cavity, of the end cover is defined as a first end face, the end face, opposite to the first end face, of the end cover is defined as a second end face, and a rotating shaft penetrates through the first end face and the second end face; the second end face is provided with a plurality of reinforcing ribs surrounding the rotating shaft. The fan solves the technical problem that in the prior art, reinforcing ribs disturb air, so that abnormal sound is generated by the fan.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioners, in particular to a cross-flow fan and an air conditioner Background Art

[0002] The cross-flow fan in the indoor unit of a household air conditioner is cylindrical. Since one end of the shaft of the cross-flow fan needs to be inserted to a certain depth, a part of the cylindrical platform will protrude inside. To ensure strength, a group of reinforcing ribs will be arranged around the cylindrical platform. As Figure 1 shown, because the reinforcing ribs are arranged inside the fan, during the operation of the fan, it will disturb the air. Although the relative rotational speed here is not high, there will still be a slight impact Summary of the Utility Model

[0003] Aiming at the deficiencies in the prior art, the utility model provides a cross-flow fan and an air conditioner, which solve the technical problem that the reinforcing ribs in the prior art disturb the air and cause abnormal noise of the fan

[0004] According to the embodiments of the utility model, the following technical solutions are adopted

[0005] A cross-flow fan, comprising

[0006] A blade assembly, including a plurality of blades arranged in a ring shape, and the plurality of blades enclose a diversion cavity that is partially enclosed around the perimeter and open at opposite ends

[0007] An end cover, connected to the plurality of blades, for closing one end of the diversion cavity. Define one end face of the end cover facing the diversion cavity as the first end face, and the one opposite to the first end face as the second end face. The first end face and the second end face are penetrated by a rotating shaft, and a plurality of reinforcing ribs are arranged around the rotating shaft on the second end face

[0008] Preferably, through holes are provided on both the first end face and the second end face for the rotating shaft to pass through

[0009] Preferably, the plurality of reinforcing ribs are arranged in a circumferential array with the through hole as the center

[0010] Preferably, from the through hole to the edge direction of the second end face, the cross-sectional area of the reinforcing rib gradually decreases

[0011] Preferably, the cross-section of the reinforcing rib is in a triangular structure

[0012] Preferably, an outer groove recessed in the direction of the first end face is provided on the second end face, and the reinforcing rib is located in the outer groove; and / or

[0013] An inner boss protruding in the direction of the diversion cavity is provided on the first end face

[0014] Preferably, the hypotenuse of the cross-section of the inner boss is a straight line or a curve.

[0015] Preferably, a plurality of positioning notches are provided on the first end surface, and the plurality of positioning notches are arranged in one-to-one correspondence with the plurality of fan blades for fixing the fan blades.

[0016] This embodiment also provides an air conditioner, including the cross-flow fan described above.

[0017] Compared with the prior art, the present utility model has the following beneficial effects: The end cover is fixed on the fan blade assembly to close one end of the diversion cavity. The first end surface and the second end surface of the end cover are connected by a rotating shaft, and the rotating shaft passes through the first end surface and the second end surface to enable the fan to rotate. A plurality of reinforcing ribs are also provided on the second end surface. The reinforcing ribs can increase the rigidity and stability of the end cover, and at the same time help to reduce vibration. Moreover, the reinforcing ribs are provided on the second end surface of the end cover and are located outside the fan blade assembly, so they will not disturb the air and prevent abnormal noise from occurring when the fan rotates. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of a cross-flow fan in the prior art;

[0019] Figure 2 It is a schematic structural diagram of a cross-flow fan in an embodiment of the present utility model;

[0020] Figure 3 It is an exploded schematic diagram of a cross-flow fan in an embodiment of the present utility model;

[0021] Figure 4 It is an exploded schematic diagram of a cross-flow fan in an embodiment of the present utility model.

[0022] In the above-mentioned drawings: 1, fan blade; 2, diversion cavity; 3, end cover; 301, through hole; 302, positioning notch; 4, rotating shaft; 5, reinforcing rib; 6, outer groove; 7, inner boss. Detailed Embodiments

[0023] In order to make the purpose, technical solutions and beneficial effects of the present utility model clearer, the technical solutions in the present utility model will be further described below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] See Figures 1 to 4 , the present utility model provides a cross-flow fan and an air conditioner, including:

[0025] A fan blade 1 assembly, including a plurality of fan blades 1 arranged in a ring, and the plurality of fan blades 1 enclose to form a diversion cavity 2 that is partially closed around and open at opposite ends;

[0026] The end cover 3 is connected to the plurality of fan blades 1 and is used to close one end of the guide cavity 2. The end face of the end cover 3 facing the guide cavity 2 is defined as the first end face, and the second end face is opposite to the first end face. The first end face and the second end face are penetrated by the rotating shaft 4, and the second end face is provided with multiple reinforcing ribs 5 around the rotating shaft 4.

[0027] In this embodiment, the cross-flow fan includes a blade 1 assembly and an end cover 3. The blade 1 assembly is composed of a plurality of blades 1 arranged in a ring shape. The blades 1 enclose a guide cavity 2 which is partially closed on all sides and open at two opposite ends. When the blades 1 rotate, air enters the guide cavity 2 formed by the blades 1 from the unclosed portion of the blades 1 and is then discharged to form a wind flow. The end cover 3 is connected to the plurality of blades 1 and is used to connect the plurality of blades 1 and close one end of the guide cavity 2. The end face of the end cover 3 facing the guide cavity 2 is defined as a first end face, and the end face opposite to the first end face is defined as a second end face. The end face, the first end face and the second end face are penetrated by the rotating shaft 4, and the motor drives the rotation of the rotating shaft 4, thereby linking the fan blade 1 to rotate to form a wind flow. A plurality of reinforcing ribs 5 are provided around the rotating shaft 4 on the second end face, which enhances the stability and rigidity of the overall structure of the rotating shaft 4 when rotating, and prevents the rotating shaft 4 from vibrating during the rotation process. Furthermore, the second end face is located on the outside of the fan blade 1 assembly and is arranged around the rotating shaft 4, which effectively enhances the stability and durability of the fan, and will not disturb the air during the operation of the fan, thereby avoiding abnormal noise from the fan.

[0028] The first end surface and the second end surface are both provided with a through hole 301 for the rotation shaft 4 to pass through.

[0029] In this embodiment, through holes 301 are provided on the first and second end faces of the end cover 3 for the shaft 4 to pass through. The shaft 4 passes through the center of the end cover 3 to ensure that the fan blade 1 assembly can rotate around the shaft 4.

[0030] The plurality of reinforcing ribs 5 are arranged in a circular array with the through hole 301 as the center.

[0031] In this embodiment, a plurality of reinforcing ribs 5 are arranged on the second end face of the end cover 3 in a circular array with the through hole 301 as the center. The reinforcing ribs 5 are evenly distributed around the through hole 301 of the rotating shaft 4 to form a structure similar to a spoke, so as to enhance the structural strength of the end cover 3 and prevent deformation or vibration during high-speed rotation, thereby improving the stability of the entire fan. The evenly distributed reinforcing ribs 5 help to improve the airflow characteristics, reduce turbulence and noise, make the airflow smoother, optimize the aerodynamics, and make the cross-flow fan more efficient and quiet during operation.

[0032] From the via hole 301 towards the edge direction of the second end face, the cross-sectional area of the reinforcing rib 5 gradually decreases.

[0033] In this embodiment, from the via hole 301 outwards towards the edge direction of the second end face, the cross-sectional area of the reinforcing rib 5 gradually decreases. The reinforcing rib 5 is thicker near the via hole 301 and gradually tapers towards the position far from the via hole 301 and close to the edge of the end cap 3. The position near the via hole 301 bears a greater force, so maintaining a larger cross-sectional area can ensure the strength of this area. The part extending outwards gradually tapers, which can reduce the weight while ensuring the overall structural strength, thereby reducing the inertial force during rotation and improving the rotation efficiency. The design of the gradually tapering cross-section of the reinforcing rib 5 helps to reduce the air flow resistance and the noise generated when the air flow passes through.

[0034] The cross-section of the reinforcing rib 5 is in a triangular structure.

[0035] In this embodiment, the cross-section of each reinforcing rib 5 perpendicular to its length direction is a triangle. The design of the triangular cross-section can reduce the amount of material used while ensuring the strength, making the reinforcing rib 5 both light and strong, which helps to reduce the moment of inertia and improve the response speed and efficiency of the fan.

[0036] The second end face is provided with an outer groove 6 recessed towards the first end face, and the reinforcing rib 5 is located in the outer groove 6; the first end face is provided with an inner boss 7 protruding towards the direction of the flow guiding cavity 2.

[0037] In this embodiment, the reinforcing rib 5 is embedded in the groove to increase the contact area with the end cap 3, thereby enhancing the structural stability of the end cap 3. The shape of the inner boss 7 is continuous and smooth, and will not disturb the internal air flow, thus avoiding abnormal noises.

[0038] The hypotenuse of the cross-section of the inner boss 7 is a straight line or a curve.

[0039] In this embodiment, when the inner boss 7 has a straight hypotenuse, it can provide uniform structural strength to ensure stable support in all directions of the end cap 3. When the inner boss 7 has a curved hypotenuse, it can better guide the air flow, reduce air flow separation and eddy currents, thereby reducing noise and improving air flow efficiency.

[0040] The first end face is provided with a plurality of positioning notches 302, and the plurality of positioning notches 302 are arranged in one-to-one correspondence with the plurality of fan blades 1 for fixing the fan blades 1.

[0041] In this embodiment, a plurality of positioning notches 302 are provided on the first end face of the end cover 3. The plurality of positioning notches 302 are arranged in one-to-one correspondence with the plurality of fan blades 1. The positioning notches 302 can ensure that each fan blade 1 has an accurate position during installation, thereby improving the assembly accuracy and ensuring the balance and stability of the fan blade 1 during operation. It can be understood that end covers 3 should be provided both in front of and behind the fan blade 1 to fix the fan blade 1.

[0042] This embodiment also provides an air conditioner, including the cross-flow fan described above. The specific structure of this air conditioner refers to the above embodiment. Since this air conditioner adopts all the technical solutions of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be elaborated here one by one.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A cross-flow fan, characterized in that, Comprising: A blade assembly, including a plurality of blades arranged in a ring shape. The plurality of blades enclose to form a diversion cavity that is partially enclosed on the periphery and open at opposite ends. An end cap, connected to the plurality of blades, for closing one end of the diversion cavity. Define one end face of the end cap facing the diversion cavity as the first end face, and the one opposite to the first end face as the second end face. The first end face and the second end face are penetrated by a rotating shaft, and a plurality of reinforcing ribs are provided around the rotating shaft on the second end face.

2. A cross-flow fan according to claim 1, characterized in that: Both the first end face and the second end face are provided with through holes for the rotating shaft to pass through.

3. The cross-flow fan according to claim 2, characterized in that, The plurality of reinforcing ribs are arranged in a circular array with the through hole as the center.

4. A cross-flow fan according to claim 3, characterized in that: From the through hole towards the edge direction of the second end face, the cross-sectional area of the reinforcing rib gradually decreases.

5. The cross-flow fan according to claim 4, wherein The cross-section of the reinforcing rib is in a triangular structure.

6. A cross-flow fan according to any one of claims 1 to 5, characterized in that: The second end face is provided with an outer groove recessed towards the first end face, and the reinforcing rib is located in the outer groove; and / or The first end face is provided with an inner boss protruding towards the diversion cavity.

7. The cross-flow fan according to claim 6, characterized in that, The hypotenuse of the cross-section of the inner boss is a straight line or a curve.

8. The cross-flow fan according to claim 1, wherein, The first end face is provided with a plurality of positioning notches, and the plurality of positioning notches are arranged in one-to-one correspondence with the plurality of blades for fixing the blades.

9. An air conditioner, characterized in that, Including the cross-flow fan according to any one of claims 1-8.

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