Fan and air conditioner comprising same

Abstract

The utility model relates to the technical field of air conditioning equipment, in particular to a fan and an air conditioner comprising the fan, and aims to solve the problem that noise and vibration of a fan of an existing air conditioner are obvious in the operation process. In order to achieve the purpose, the fan comprises a driving motor and a plurality of blades, the blades are arranged at the output end of the driving motor at intervals in the circumferential direction and can rotate around the output end under driving of the driving motor, and the edges of the two opposite sides of each blade are arranged to be of a curve-shaped structure and a sawtooth-shaped structure respectively. A certain included angle is formed between the blades and the rotating plane of the fan. Through the arrangement, the air suction efficiency and the air suction amount of the fan can be improved through the curve-shaped edges, turbulent flow generated when air flows through the blades in the high-speed rotation process of the blades can be remarkably reduced through the sawtooth-shaped edges, differential pressure distribution of the tail portions of the blades is optimized, and wind pressure resistance and aerodynamic noise are reduced; and the operation efficiency and the stability of the fan are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning equipment technical field, concretely provides a fan and including the fan's air conditioner. BACKGROUND

[0002] At present, axial flow fan has the characteristics of large air volume and small wind pressure, is widely used in air conditioner or electric fan, can output stable and soft wind outward, satisfies the demand of heat transfer, but in the process of high speed rotation of fan, obvious noise and even vibration will be produced due to the large wind pressure around the blade.

[0003] In order to solve this problem, manufacturers have tried various schemes, such as making the blade adopt sawtooth edge or wavy edge, which alleviates noise and vibration to some extent.

[0004] However, under the existing scheme, the noise and vibration of the fan during operation are still obvious, and there is still room for further reduction.

[0005] Therefore, there is a need in the art for a new technical solution to solve the above problems. SUMMARY

[0006] The utility model aims at solving the above technical problem, that is, the noise and vibration of the fan of the existing air conditioner during operation are still obvious.

[0007] In a first aspect, the utility model provides a fan, which comprises: a driving motor and a plurality of blades, the plurality of blades are arranged in a circumferential direction on the output end of the driving motor, can rotate around the output end under the driving of the driving motor, the opposite side edges of the blade are respectively arranged as a curved structure and a sawtooth structure, and a certain angle is formed between the blade and the rotation plane of the fan.

[0008] In the preferred technical scheme of the above fan, the front edge of the blade along the rotation direction is arranged as a curved structure, and the rear edge of the blade along the rotation direction is arranged as a sawtooth structure.

[0009] In the preferred technical scheme of the above fan, the angle between the blade and the rotation plane is set to 30° to 45°, the curved structure is located on the air inlet side of the fan, and the sawtooth structure is located on the air outlet side of the fan.

[0010] In the preferred technical scheme of the above fan, the number of teeth of the sawtooth structure is set to not less than 5.

[0011] In the preferred technical scheme of the above fan, the tooth height of the sawtooth structure is set to not less than twice the tooth width.

[0012] In the preferred technical scheme of the fan, the distance between two adjacent blades is not less than 2cm.

[0013] In the preferred technical scheme of the fan, the number of the blades is an odd number and is not less than 9.

[0014] In the preferred technical scheme of the fan, the fan further comprises a fixed ring, and the edge of each blade away from the rotation center is fixedly connected with the fixed ring.

[0015] In the preferred technical scheme of the fan, the fan further comprises a fixed disc coaxially connected with the output end of the driving motor, and the edge of each blade close to the rotation center is fixedly connected with the fixed disc.

[0016] In the second aspect, the utility model provides a kind of air conditioner, and the air conditioner includes the fan described above.

[0017] In the case of using the above technical scheme, the fan of the utility model includes: driving motor and multiple blades, multiple blades are arranged at the output end of driving motor along the circumference interval, can rotate around the output end under the drive of driving motor, and the opposite side edges of blade are respectively arranged as curve structure and sawtooth structure, and a certain angle is formed between blade and the rotation plane of fan.Through such setting, the curve structure and sawtooth structure of the two sides of blade can significantly reduce the turbulence generated when air flows through blade in the process of high-speed rotation of blade, optimize the differential pressure distribution of blade tail, reduce wind pressure resistance and aerodynamic noise, and improve the air supply efficiency and stability of fan.

[0018] Further, the front edge of blade along its rotation direction is arranged as curve structure, and the rear edge of blade along its rotation direction is arranged as sawtooth structure.Through such setting, the curve structure of blade leading edge is conducive to optimizing aerodynamic performance and increasing front-end air intake amount when fan operates, and the sawtooth structure of blade trailing edge can make vortex when air flows at high speed, ensure that the distribution of air flow rate is more uniform, optimize the differential pressure distribution of blade tail, help to reduce the impact and vibration between fan blade and gas, and further reduce the generation of noise and vibration, to achieve the purpose of noise reduction.

[0019] Further, the angle between blade and rotation plane is set to 30° to 45°, and the curve structure is located at the air inlet side of fan, and the sawtooth structure is located at the air outlet side of fan.Through such setting, the air inlet efficiency and noise level of fan in this angle range reach a good balance, which helps to control noise while obtaining larger air volume and air speed.

[0020] Further, the number of teeth of the sawtooth structure is not less than 5. Through such setting, the eddy current intensity is increased, and the noise reduction effect is improved.

[0021] Further, the tooth height of the sawtooth structure is not less than twice of the tooth width. Through such setting, the eddy current intensity is also increased, and the noise reduction effect is improved.

[0022] Further, the distance between the adjacent two blades is not less than 2 cm. Through such setting, the airflow disturbance, the friction and noise of the blade surface are prevented due to the small distance between the blades, and the noise reduction purpose is achieved.

[0023] Further, the number of blades is odd and not less than 9. Through such setting, on one hand, the resonance and shaking of the blades are reduced due to the non-symmetrical arrangement of the blades, the noise is reduced, and the stability and service life of the fan are improved; on the other hand, the reasonable power system is formed in the mechanical aspect of the fan with odd number of blades, the power and energy are saved; on the other hand, the air volume and air pressure are increased by increasing the number of the fan blades, the air cutting is more detailed, the softer wind is produced, the sound wave is reduced, and the noise is reduced.

[0024] Further, the fan further comprises a fixed ring, and the edge of each blade away from the rotation center is fixedly connected with the fixed ring. Through such setting, the overall strength of the fan is improved, the vibration during the high-speed rotation of the fan is reduced, and the stability of the fan is improved.

[0025] Further, the fan further comprises a fixed disc, the fixed disc is coaxially connected with the output end of the driving motor, and the edge of each blade close to the rotation center is fixedly connected with the fixed disc. Through such setting, the fan blades and the driving motor are quickly installed, and the overall strength of the fan is further improved.

[0026] In addition, the air conditioner further provided on the basis of the fan has the technical effects of the fan, compared with the air conditioner before the improvement, the air conditioner of the utility model can ensure the air outlet efficiency, effectively reduce the noise and vibration, and improve the silence of the air conditioner. BRIEF DESCRIPTION OF DRAWINGS

[0027] The preferred embodiments of the utility model are described below with reference to the drawings, and the drawings are as follows:

[0028] Figure 1 is the structural schematic view of the fan of the utility model.

[0029] List of reference signs:

[0030] 1 blade; 11 curved structure; 12 serrated structure; 2 fixed ring; 3 fixed disc. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art will understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0032] It should be noted that in the description of the present application, the terms "inner", "outer" and other terms indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0033] In addition, it should also be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "set", "install", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] The noise and vibration of the fan of the existing air conditioner in the running process are obvious. The present application provides a fan and an air conditioner comprising the fan. By setting a driving motor and a plurality of blades, the plurality of blades are arranged in a circumferential direction on the output end of the driving motor, and can rotate around the output end under the driving of the driving motor. The opposite side edges of the blade are respectively set as a curved structure and a serrated structure, and a certain angle is formed between the blade and the rotation plane of the fan. The curved edge can increase the air suction efficiency and the air suction amount of the fan, and the serrated edge can significantly reduce the turbulence generated when the air flows through the blade during high-speed rotation of the blade. The differential pressure distribution of the tail of the blade is optimized, the wind pressure resistance and the aerodynamic noise are reduced, and the running efficiency and stability of the fan are improved.

[0035] Since the fan is widely used in the air supply system or cooling system of various devices, such as air conditioners, automobiles and the like, it will produce noise during high-speed rotation, which makes the user feel uncomfortable. Therefore, how to reduce the noise of the fan has been a problem that manufacturers need to solve.

[0036] The running noise of the fan is mainly composed of mechanical noise and air flow noise, and the scheme aims to solve how to reduce the air flow noise. Specifically, when the blades of the fan rotate at high speed, the surrounding air is stirred, causing irregular air flow, air-air interaction and air-blade interaction, thereby generating air flow noise, and as the fan speed increases, the air-blade interaction becomes more intense, resulting in more obvious noise.

[0037] Based on this, as Figure 1 shown, the fan of the utility model includes a driving motor and a plurality of blades 1, the plurality of blades 1 are arranged on the output shaft of the driving motor in a circumferential direction, and can rotate under the driving of the driving motor, thereby realizing air suction to suck air from the air inlet side of the fan and blow out from the air outlet side of the fan, forming an air flow.

[0038] Preferably, the blade 1 is arranged as an irregular quadrilateral structure, including oppositely arranged blade 1 leading edges and blade 1 trailing edges, when the fan rotates at high speed, the blade 1 rotates towards the direction of the blade 1 leading edge, and the blade 1 leading edge is used to cut the air to split the air and make the air flow from both sides of the blade 1. Since the blade 1 and the rotation plane of the fan maintain a certain angle, that is, the surface of the blade 1 presents a tendency to tilt from the air inlet side to the air outlet side along the direction from the leading edge to the trailing edge, so that the blade 1 leading edge is at the air inlet side and the blade 1 trailing edge is at the air outlet side. In this way, the air can be pressed into the air inlet side by the high-speed rotating blade 1 and pressed out from the air outlet side, thereby forming a stable air flow.

[0039] It should be noted that in actual application, the angle between the blade 1 and the rotation plane can be flexibly set by those skilled in the art, which can be between 0° and 90°, as long as it can produce a suction effect on the air. This flexible adjustment and change does not deviate from the principles and scope of the utility model, and should be limited within the protection scope of the utility model. In this application, the angle is preferably set to 30° to 45°, so that the air inlet efficiency and noise level of the fan in this angle range reach a better balance, which helps to control the noise while obtaining larger air volume and air speed.

[0040] In order to improve the air suction efficiency of the fan and reduce the running noise of the fan, the blade 1 leading edge in the present application is arranged as a smooth curve structure 11, which can increase the air inlet channel and improve the air inlet efficiency on the one hand, and can ensure the axial flow of the air flow and increase the air supply speed and air supply distance on the other hand.

[0041] The rear edge of the blade 1 is provided with a sawtooth structure 12, when the blade 1 rotates at a high speed, the air flow enters the pressure surface of the blade 1 from the front edge of the blade 1 and then flows out from the rear edge of the blade 1, when the air flow slides at a high speed through the rear edge of the blade 1, due to the pressure difference and flow direction change, noise is generated. Therefore, the sawtooth structure 12 can generate vortex flow when the air flows at a high speed, ensure that the air flow speed distribution is more uniform, optimize the pressure difference distribution of the tail of the blade 1, help to reduce the impact and vibration between the fan blade 1 and the gas, and further reduce the generation of noise and vibration, and achieve the purpose of noise reduction.

[0042] It should be noted that, compared with the prior art, the number, tooth height and tooth width of the sawtooth structure 12 in the scheme are all optimized after repeated experiments, and the noise reduction performance of the blade 1 is further improved.

[0043] Preferably, as shown in Figure 1 The number of teeth of the sawtooth structure 12 is not less than 5, and the tooth height of the sawtooth structure 12 is not less than twice the tooth width.

[0044] Further preferably, the number of teeth of the sawtooth structure 12 is 10, the tooth height is 10mm, and the tooth width is 3mm. In this way, the vortex intensity is increased, and the noise reduction effect is further improved.

[0045] In addition, the fan of the utility model also adopts some other noise reduction measures, such as the number, spacing and material of the blade 1.

[0046] Preferably, as shown in Figure 1 The number of blades 1 of the utility model is set to an odd number, and is not less than 9. In this case, the number of blades 1 is set to 9 or 11, on the one hand, the symmetrical arrangement of the blades 1 can be avoided, thereby reducing the resonance and vibration of the blades 1, reducing the noise, and improving the stability and service life of the fan; on the other hand, the fan with odd number of blades 1 can form a reasonable power system in mechanics, saving power and energy; on the other hand, increasing the number of blades 1 of the fan can also improve the air volume and air pressure, making the air cutting more detailed, and the air outlet more soft and uniform, while reducing the generation of turbulent flow and sound wave, and reducing the noise.

[0047] Preferably, the distance between the adjacent two blades 1 of the utility model is not less than 20mm. Through such setting, the air flow disturbance caused by too small distance between the blades 1 can be prevented, the friction and noise on the surface of the blade 1 are reduced, and finally the purpose of noise reduction is achieved.

[0048] Preferably, as shown in Figure 1As shown, the fan further comprises a fixed ring 2, the radius of the fixed ring 2 is equal to the rotating radius of the fan, the fixed ring 2 is installed at the outermost side of the fan blade, and the edge of each blade 1 away from the rotating center is fixedly connected with the inner side of the fixed ring 2. Thus, the fan forms a whole, the overall strength of the fan is improved, the vibration and noise in the high-speed rotating process of the fan are reduced, and the stability of the fan is improved.

[0049] A fixed disc 3 is further arranged at the center of the fan, the fixed disc 3 is coaxially connected with the output end of the driving motor, the edge of each blade 1 close to the rotating center is fixedly connected with the fixed disc 3, all the blades 1 are fixed between the fixed disc 3 and the fixed ring 2, the stable connection between the blades 1 and the driving motor is facilitated, the fan is also convenient to disassemble, and the overall strength of the fan is further improved.

[0050] The material of the blade 1, the outer ring and the fixed disc 3 is preferably hard plastic, so that the strength and light weight of the fan are effectively considered.

[0051] In addition, the air conditioner further provided on the basis of the above-mentioned fan has the technical effects of the above-mentioned fan, compared with the air conditioner before improvement, the air conditioner of the utility model effectively reduces the noise and vibration while ensuring the air outlet efficiency, and improves the quietness of the air conditioner.

[0052] Therefore, the technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the utility model, and the technical schemes after the changes or replacements will all fall within the protection scope of the utility model.

Claims

1. A fan, characterized by, The fan comprises: a driving motor and a plurality of blades (1) which are circumferentially spaced apart on the output end of the driving motor and can rotate around the output end under the driving of the driving motor, and the opposite side edges of the blades (1) are respectively provided as a curved structure (11) and a sawtooth structure (12), and the blades (1) form a certain angle with the rotation plane of the fan.

2. The fan of claim 1, wherein, The front edge of the blade (1) along the rotation direction is provided as the curved structure (11), and the rear edge of the blade (1) along the rotation direction is provided as the sawtooth structure (12).

3. The fan of claim 2, wherein, The angle between the blade (1) and the rotation plane is set to 30° to 45°, and the curved structure (11) is located on the air inlet side of the fan, and the sawtooth structure (12) is located on the air outlet side of the fan.

4. The fan of claim 1, wherein, The number of teeth of the sawtooth structure (12) is set to be not less than 5.

5. The fan of claim 1, wherein, The tooth height of the sawtooth structure (12) is set to be not less than twice the tooth width.

6. The fan of claim 1, wherein, The distance between two adjacent blades (1) is not less than 2 cm.

7. The fan of any one of claims 1 to 6, wherein, The number of blades (1) is set to be an odd number and not less than 9.

8. The fan of any one of claims 1 to 6, wherein, The fan further comprises a fixed ring (2), and the edge of each blade (1) away from the rotation center is fixedly connected with the fixed ring (2).

9. The fan of any one of claims 1 to 6, wherein, The fan further comprises a fixed disc (3), and the fixed disc (3) is coaxially connected with the output end of the driving motor, and the edge of each blade (1) close to the rotation center is fixedly connected with the fixed disc (3).

10. An air conditioner characterized by comprising: The air conditioner comprises the fan according to any one of claims 1 to 9.

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