Axial flow fan and air conditioner with same

Abstract

The invention provides an axial fan and an air conditioner with the same. The axial fan comprises a hub and fan blades, wherein each fan blade is provided with a suction surface and a pressure surface, and comprises a leading edge part and a trailing edge part, wherein the trailing edge part is provided with a trailing edge part root and a trailing edge part periphery adjacent to the hub, and a bending part is arranged on the trailing edge part and extends along the trailing edge part. The air conditioner comprises the axial fan. According to the axial fan and the air conditioner with the same, due to the bending parts arranged on the trailing edge parts of the axial fan, effective bending and airflow momentum at the trailing edge parts of the fan blades are increased, so that airflow can easily overcome adverse pressure gradient at the trailing edge parts of the pressure surfaces, the separation areas of the pressure surfaces are reduced, profilelift is increased, the air quantity of the axial fan can be effectively improved without changing air pressure and increasing the diameter of the fan, noise can be reduced, and the requirement on mute function and environmental protection of the air conditioner can be met.

Description

technical field [0001] The invention relates to the field of air conditioning, and more specifically, relates to an axial flow fan and an air conditioner having the same. Background technique [0002] All kinds of axial flow fans are generally used in outdoor units of air conditioners or other ventilation equipment to circulate the air. Such as figure 1 The shown existing axial flow fan for air conditioner has a basic structure comprising a circular hub 10 with a center of rotation and a plurality of vanes 20 arranged radially on the outer periphery of the hub 10, wherein the vanes 20 have airfoils 21, As for the leading edge 22 and the trailing edge 24, the trailing edge 24 is substantially linear. Driven by the motor to rotate, the air flows in from the leading edge of the vane 20 , is boosted by the airfoil 21 and then flows out from the trailing edge 24 of the vane 20 . [0003] Low-pressure axial flow fans are commonly used in existing air-conditioning external units...

AI Technical Summary

Problems solved by technology

Due to the expansion part formed on the rear edge of this type of airfoil, the air flowing out from this part will generate a vortex behind the expansion part, so the air supply noise will increase

[0006] In summary, when the diameter of the fan is constant, the higher the speed, the greater the noise

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