High-speed fan blade capable of efficiently discharging air and high-speed fan

Abstract

The high-speed fan blade comprises a fan blade base, a plurality of blades are evenly arranged on the outer surface of the fan blade base, and the width of each blade is the length of the blade in the direction perpendicular to the outer surface of the fan blade base. The width of the blades is gradually increased in the airflow passing direction, the opposite points of the adjacent blades are the corresponding points of the adjacent blades on the plane perpendicular to the wind direction, the distance between the opposite points of the adjacent blades is gradually increased in the airflow passing direction, and the cross sectional area of the airflow channel is gradually increased from the air inlet end of the fan blade to the air outlet end of the fan blade. The section of the air duct is gradually enlarged from the air inlet to the air outlet, the pressure intensity of the air inlet end is larger than that of the air outlet end, fluid entering the fan blades is increased, the efficiency of the fan blades is improved, the pressure intensity of the air outlet is reduced, the starting noise of the fan blades can be reduced, the air volume of the air outlet is increased, and the beneficial effect of improving the overall working efficiency of the high-speed fan is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of small -size household electrical appliances's high -speed fan, especially high -speed fan fan blade of high -efficient air outlet. BACKGROUND

[0002] The working of the high-speed fan of small household electrical appliances is based on motor driving impeller rotation, driving air flow. When the motor is powered on, a rotating magnetic field is generated to drive the rotor to rotate at high speed, and the impeller connected with the rotor rotates accordingly. The blades of the impeller push the air to make the air gain kinetic energy and be thrown out in the radial or axial direction. The casing collects the high-speed airflow, reduces the airflow velocity through diffusion, converts part of the kinetic energy into static pressure energy, and finally forms an airflow with certain pressure and velocity from the air outlet to realize functions such as drying, dust collection, and air purification. The high-speed fan quickly generates strong airflow to accelerate the evaporation of water on the surface of the hair, and the heating wire blows out hot air to achieve the purpose of quickly drying the hair. The impeller of the existing high-speed fan is usually made of plastic or aluminum alloy, and the blades of the impeller are mostly backward-curved blades, which can increase the static pressure of the air outlet, but the pressurization effect and efficiency are not good enough. SUMMARY

[0003] In order to overcome the shortcomings and deficiencies of the prior art, the utility model provides a high-efficiency air outlet high-speed fan blade and high-speed fan, which solves the technical problem of insufficient pressurization effect and air outlet efficiency of the impeller of the traditional high-speed fan.

[0004] The utility model discloses a kind of high-efficiency air outlet high-speed fan blades, including fan blade base, the outer surface of the fan blade base is evenly provided with multiple blades, the width of the blade is the length of the blade in the direction perpendicular to the outer surface of the fan blade base, the width of the blade gradually increases along the direction of airflow passing, the relative point of adjacent blade is the corresponding point of adjacent blade in the plane perpendicular to wind direction, the distance between the relative point of adjacent blade gradually increases along the direction of airflow passing, the cross-sectional area of airflow channel gradually increases from the air inlet end of fan blade to the air outlet end.

[0005] As preferably, the blade is wing-shaped or circular-arc-shaped.

[0006] As preferably, the fan blade base includes a cylindrical structure and a boss protruding from the end of the cylindrical structure, and the blades are arranged on the outer surface of the cylindrical structure.

[0007] As preferably, the boss has a shaft hole for the rotation shaft of the high-speed fan to pass through.

[0008] As preferably, the cylindrical structure is a hollow structure.

[0009] As preferably, the blade end of the blade at the air inlet end is in a blade edge structure.

[0010] As preferably, the blade edge structure has a continuously undulating wave-shaped blade edge.

[0011] As preferably, the thickness of the blade end of the blade edge structure is not more than 0.3mm.

[0012] A high-speed fan comprising a high-efficiency air outlet high-speed fan blade, a casing, a stator assembly, and a rotor assembly, the rotor assembly comprising a rotating shaft.

[0013] As preferably, the casing comprises an inner casing and an outer casing arranged coaxially, the inner casing is provided with a plurality of mounting cavities adjacent to the inside thereof, the mounting cavities comprising a bearing chamber and a stator mounting cavity, a plurality of stationary vanes are arranged between the inner casing and the outer casing, and the profile of the stationary vanes is composed of a plurality of asymptotes.

[0014] Compared with the prior art, the high-speed fan with high-efficiency air outlet has the following beneficial effects:

[0015] The utility model discloses a high -efficient air outlet high -speed fan blade and high -speed fan, including the blade base, the outer surface of blade base evenly is provided with a plurality of blades, the width of blade is the length of blade in perpendicular to the outer surface direction of blade base, the width of blade gradually increases along the direction of airflow passing, and the opposite point of adjacent blade is the corresponding point of adjacent blade on the plane perpendicular to the wind direction, the distance between the opposite point of adjacent blade gradually increases along the direction of airflow passing, and the cross section area of airflow channel gradually increases from the air inlet end to the air outlet end of the blade. Two blades are adjacent to each other to form an air duct, and the cross section of the air duct gradually expands from the air inlet to the air outlet by gradually increasing the width of the blade and the distance between the corresponding points of the blade setting positions. According to Bernoulli's principle, when the volume of fluid increases, the pressure of fluid decreases. The gradually expanding air duct causes the pressure at the air inlet end to be greater than the pressure at the air outlet end. Due to the pressure difference, the fluid entering the blade is increased, and the efficiency of the blade is improved. At the same time, the noise during the start of the blade is reduced, and the air volume at the air outlet is increased. The technical problems of insufficient pressure increase and air outlet efficiency of the impeller of the traditional high-speed fan are solved, and the overall working efficiency of the high-speed 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.

[0017] Fig. 1 It is the schematic diagram of the high -efficient air outlet high -speed fan blade of the utility model.

[0018] Fig. 2 is the A-A section view schematic diagram of the high-efficiency air outlet high-speed fan blade of the utility model.

[0019] Fig. 3 is the C-C section view schematic diagram of the high-speed fan in the utility model embodiment.

[0020] Reference signs: 1-blade; 11-inlet end; 12-outlet end; 13-blade base; 131-cylinder structure; 132-tumour; 14-blade; 2-casing; 21-inner casing; 22-outer casing; 23-stator blade; 3-stator assembly; 4-rotating shaft. DETAILED DESCRIPTION

[0021] The utility model will be further described below in combination with the drawings and specific embodiments, but the described embodiments are only a part of the utility model embodiments, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the scope of the utility model protection.

[0022] Please refer to Figs. 1 to 3A high-speed fan with high-efficiency air outlet fan blades, comprising a fan blade 1, a casing 2, a stator assembly 3, a rotor assembly, the rotor assembly comprising a rotating shaft 4 and a rotor magnet, the rotor magnet is the rotating part of the high-speed motor, which is composed of permanent magnets, under the action of the magnetic field generated by the stator assembly, the rotor magnet will be affected by electromagnetic force and rotate, thereby outputting mechanical energy; the stator assembly 3 is the stationary part of the high-speed motor, which is composed of silicon steel sheets, and the surface is wound with a coil, when the current passes through the coil, a magnetic field will be generated, which is used to drive the rotor to rotate. The rotor magnet is fixed on the rotating shaft 4 and placed in the internal cavity of the stator assembly 3, the rotating shaft 4 passes through the casing 2 and is fixedly connected with the fan blade 1, after being energized, the rotor assembly rotates under the drive of the stator assembly 3, driving the fan blade 1 to rotate and making the gas flow, the gas flows from the air inlet end 11 to the air outlet end 12 of the fan blade 1, the fan blade 1 comprises a fan blade base 13 and a blade 14, the blade is airfoil-shaped or circular-arc-shaped, a plurality of blades 14 are uniformly arranged on the outer surface of the fan blade base 13, the connection between the blade 14 and the outer surface of the fan blade base 13 is a curve, the width of the blade 14 is the length of the blade 14 in the direction perpendicular to the outer surface of the fan blade base 13, and the width of the blade 14 gradually increases along the direction of airflow passing; the relative points of adjacent blades 14 are corresponding points of adjacent blades in a plane perpendicular to the wind direction, that is, the connecting curve between the connection of adjacent blades 14 and the outer surface of the fan blade base 13, the connecting curve being perpendicular to the instantaneous wind direction, the distance between the relative points of adjacent blades 14 gradually increases along the direction of airflow passing, the airflow channel between adjacent blades 14 has an outward expanding shape, the cross-sectional area of the airflow channel gradually increases from the air inlet end 11 to the air outlet end 12 of the fan blade, so that the pressure at the air inlet end is greater than the pressure at the air outlet end, the static pressure of the gas at the air outlet end of the fan blade increases, and the air volume increases.

[0023] Further, the casing 2 comprises an inner casing 21 and an outer casing 22 arranged coaxially, a plurality of installation cavities are arranged adjacent to the inside of the inner casing 21, the installation cavities comprise a bearing chamber and a stator installation cavity, a plurality of stationary vanes 23 are arranged between the inner casing 21 and the outer casing 22, and the profile line of the stationary vane 23 is composed of a plurality of asymptotes.

[0024] Further, the fan blade base 13 comprises an internally hollow cylindrical structure 131 and a boss 132 protruding from the end of the cylindrical structure, the blade 14 is arranged on the outer surface of the cylindrical structure 131, the boss 132 has an axle hole for the rotating shaft of the high-speed fan to pass through, and the internally hollow cylindrical structure is assembled with the outer bearing chamber of the casing, so that the fan has a compact and stable volume.

[0025] Further, the blade 14 is of a blade end structure at the air inlet end 11, the thickness of the blade end structure is not more than 0.3mm, specifically 0.1mm, and the blade angle is the angle between the blade and the back, in this embodiment, the angle between the blade end and the thickest part of the blade, and the blade angle is 15°-20°.

[0026] In another embodiment, the blade end structure has a continuously undulating wavy blade edge, and the thickness of each part of the blade is 0.3mm.

[0027] The above is only a specific embodiment of the present application. Obviously, the present application is not limited to the above embodiments, and many similar modifications can be made, and all modifications directly derived or thought from the disclosed content by those of ordinary skill in the art should be considered as falling within the scope of the present application.

Claims

1. A high-speed fan blade with high-efficiency air output, characterized in that, The device includes a blade base, on the outer surface of which multiple blades are evenly arranged. The width of each blade is its length in a direction perpendicular to the outer surface of the blade base. The width of each blade gradually increases along the direction of airflow. The relative points of adjacent blades are corresponding points of adjacent blades on a plane perpendicular to the wind direction. The distance between the relative points of adjacent blades gradually increases along the direction of airflow. The cross-sectional area of ​​the airflow channel gradually increases from the air inlet end to the air outlet end of the blade.

2. The high-efficiency air outlet high-speed fan blade as described in claim 1, characterized in that, The blades are airfoil-shaped or arc-shaped.

3. The high-efficiency air outlet high-speed fan blade as described in claim 1, characterized in that, The blade base includes a cylindrical structure and a boss protruding from the end of the cylindrical structure, and the blade is disposed on the outer surface of the cylindrical structure.

4. The high-efficiency air outlet high-speed fan blade as described in claim 3, characterized in that, The boss has a shaft hole through which the shaft of a high-speed fan passes.

5. The high-efficiency air outlet high-speed fan blade as described in claim 3, characterized in that, The cylindrical structure is hollow inside.

6. The high-efficiency air outlet high-speed fan blade as described in claim 1, characterized in that, The blade has a blade-shaped structure at the tip of the blade at the air inlet end.

7. The high-efficiency air outlet high-speed fan blade as described in claim 6, characterized in that, The blade-shaped structure has a continuously undulating, wave-like cutting edge.

8. The high-efficiency air outlet high-speed fan blade as described in claim 6, characterized in that, The thickness of the blade tip of the blade-shaped structure does not exceed 0.3 mm.

9. A high-speed fan, characterized in that, It includes the high-efficiency air outlet high-speed fan blades, housing, stator assembly, and rotor assembly as described in any one of claims 1 to 8, wherein the rotor assembly includes a rotating shaft.

10. The high-speed fan as described in claim 9, characterized in that, The housing includes an inner shell and an outer shell arranged coaxially. The inner shell has multiple adjacent mounting cavities, including a bearing chamber and a stator mounting cavity. Multiple stationary blades are arranged between the inner shell and the outer shell, and the profile of the stationary blades is composed of multiple asymptotes.

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