Cross-flow blades and air conditioners

Abstract

The invention provides a cross-flow fan blade, which comprises a fan blade axis and a plurality of blade sheets encircling the fan blade axis, wherein each blade is in an arc shape, the longitudinal sections of the first end part and the second end part of each blade are both circular arc-shaped, in the same longitudinal section, the center line of the thicknesses of each blade forms the center line of the blade, the center line of each blade comprises more than three sections of circular arcs, the connecting line between the circle center of the circular arc at the first end part of each blade and the circle center of the circular arc at the second end part of each blade is the chord length, the chord length is L, the maximum distance between the chord length and the center line is the blade height H, the distance between the projection of the blade height H on the chord length and the circle center of the circular arc at the first end part is L1, the ratio of L1 to L is smaller than or equal to 0.4, or the ratio of L1 to L is greater than or equal to 0.6. The invention also relates to an air conditioner. According to the cross-flow fan blade and the air conditioner, the shapes of the blades of the cross-flow fan blade are of structures with high front parts and low rear parts or low front parts and high rear parts, so that the moving direction of air flow along the surfaces of the blades is changed, and the size of a separation area or an attack angle area is reduced, and accordingly the loss of air volume is reduced.

Description

technical field [0001] The invention relates to the field of household appliances, in particular to a cross-flow fan blade and an air conditioner. Background technique [0002] Such as Figure 1 to Figure 3 As shown, most of the existing cross-flow fan blades are composed of 35 identical blades arranged at unequal distances along the circumference, the outer diameter of the cross-flow fan blade is D1, and the inner diameter of the cross-flow fan blade is D2; The inner end arc 4, the leaf back 2 and the leaf pot 3 are formed. Such as image 3 The connecting line of the center of the blade thickness is the center line of the blade, and the center line of the existing blade is composed of a single arc with a radius of R. The chord length is the line connecting the inner center of the blade (the center of the inner arc 4) and the outer center (the center of the outer arc 1), the length of the chord is L, and the blade height H is defined as the difference between the chord len...

AI Technical Summary

Problems solved by technology

The chord length is the line connecting the inner center of the blade (the center of the inner arc 4) and the outer center (the center of the outer arc 1), the length of the chord is L, and the blade height H is defined as the difference between the chord length and The maximum distance between the centerlines 5, L1 is the distance between the projection position of the blade height on the chord length and the center of the outer end circle, the blade height of the existing blade is designed in the middle of the wind blade chord length, L1 / L is 0.5, and the airflow is two The multiple blades of cross-flow fan blades pass through each time. The inner and outer ends of the same blade are both the inlet area and the outlet area. The air flow generates a large angle of attack in the inlet direction of the blade surface, and the air flow separation occurs at the tail of the blade, resulting in a decrease in air volume. , power consumption increases

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