Air conditioner axial flow fan blade and air conditioner

Abstract

The invention provides an air conditioner axial flow fan blade and an air conditioner, and relates to the technical field of air conditioners, the air conditioner axial flow fan blade comprises a rotating shaft and a plurality of annular belt blades, the annular belt blades are arranged on the periphery of the rotating shaft, and each annular belt blade comprises a first wing-shaped root, a second wing-shaped root, a spiral extending part and a flow guide net cover; the first wing-shaped root part and the second wing-shaped root part are integrally arranged at the two ends of the spiral extension part, the spiral extension part spirally extends and can define an air guide channel on the inner side, and the flow guide net cover is arranged in the air guide channel and connected with the spiral extension part and can guide air in the air guide channel. Compared with the prior art, by arranging the first wing-shaped root part, the spiral extending part and the second wing-shaped root part, the acting area can be increased, the air volume can be increased, by arranging the flow guide net cover, the flow guide effect can be achieved, the acting area is further increased, airflow is more stable, and more efficient axial air outlet is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular, to an axial-flow air blade and an air conditioner of an air conditioner. Background Art

[0002] Currently, the conventional outdoor unit of an air conditioner usually conducts ventilation through an axial-flow air blade, and the axial-flow air blade is usually composed of a plurality of axial-flow blades. During the rotation of the plurality of axial-flow blades, air is conveyed along the axial direction. Due to the special structure of the outdoor unit of the air conditioner, the axial-flow blades are usually required to have the characteristics of high air volume and low noise. However, for the conventional single-piece axial-flow air blade, the working area is relatively small, and the improvement effect on the air volume under the noise requirement is limited. It is difficult to achieve efficient axial air outlet and truly achieve a high air volume. Summary of the Invention

[0003] The problem solved by the present invention is how to improve the air outlet efficiency and suppress noise while increasing the air volume.

[0004] To solve the above problems, the present invention adopts the following technical solutions to solve.

[0005] In one aspect, an embodiment of the present invention provides an axial-flow air blade of an air conditioner, including a rotating shaft and a plurality of annular blades. The rotating shaft has an air inlet end and an air outlet end opposite to each other. The plurality of annular blades are arranged around the periphery of the rotating shaft. Each annular blade includes a first airfoil root, a second airfoil root, a spiral extension part, and a flow guide mesh cover. The first airfoil root and the second airfoil root are arranged at both ends of the spiral extension part. The spiral extension part spirally extends from the first airfoil root to the second airfoil root. The first airfoil root is connected to the outer peripheral surface of the rotating shaft and is arranged near the air inlet end. The second airfoil root is connected to the outer peripheral surface of the rotating shaft and is arranged near the air outlet end. And the first airfoil root, the spiral extension part, the second airfoil root, and the rotating shaft jointly enclose a wind guide channel. The flow guide mesh cover is arranged in the wind guide channel and is connected to the spiral extension part for guiding the gas in the wind guide channel.

[0006] The axial-flow air blade of the air conditioner provided by the embodiment of the present invention is provided with a plurality of annular blades on the periphery of the rotating shaft. Each annular blade is composed of a first airfoil root, a second airfoil root, a spiral extension part, and a guide net cover. The first airfoil root and the second airfoil root are respectively fixed on the outer peripheral surface of the rotating shaft and are integrally arranged at both ends of the spiral extension part. The spiral extension part spirally extends and can form a wind guide channel by surrounding it inside. The guide net cover is arranged in the wind guide channel and is connected to the spiral extension part, and can realize the diversion of the gas in the wind guide channel. Compared with the prior art, by setting the first airfoil root, the spiral extension part, and the second airfoil root, the present invention can increase the working area, which is beneficial to increasing the air volume. At the same time, by setting the guide net cover, it can play a guiding role and further increase the working area, making the air flow more stable and ensuring more efficient axial air output.

[0007] Further, the guide net cover is arranged on the side of the spiral extension part close to the rotating shaft and is arranged at an interval from the rotating shaft to partially block the wind guide channel.

[0008] For the axial-flow air blade of the air conditioner provided by the embodiment of the present invention, by partially blocking the wind guide channel with the guide net cover, on the one hand, due to the spiral extension of the spiral extension part and the guide net cover being arranged close to the spiral extension part here, it can prevent the guide net cover from spirally extending from the first airfoil root to the second airfoil root, reducing the forming difficulty of the guide net cover. On the other hand, it avoids completely blocking the wind guide channel, can prevent the guide net cover from causing too large a load on the fan, and at the same time can also increase the air volume, further ensuring more efficient axial air output.

[0009] Further, the shielding area of the guide net cover relative to the wind guide channel is less than or equal to 1 / 2 of the flow area of the wind guide channel.

[0010] For the axial-flow air blade of the air conditioner provided by the embodiment of the present invention, by limiting the shielding area of the guide net cover, it can further prevent the guide net cover from causing too large a load on the fan, and at the same time can also increase the air volume, further ensuring more efficient axial air output.

[0011] Further, a plurality of diversion holes are opened on the guide net cover, and the plurality of diversion holes are arranged in an array for the gas at the edge of the wind guide channel to pass through.

[0012] For the axial-flow air blade of the air conditioner provided by the embodiment of the present invention, the plurality of diversion holes are arranged in an array, which can achieve the even-flow effect, improve the diversion effect of the guide net cover, and further improve the air output efficiency.

[0013] Further, the diversion area of each diversion hole is between 1 / 30 and 1 / 10 of the flow area of the wind guide channel.

[0014] The axial-flow air blade of the air conditioner provided by the embodiment of the present invention can, by limiting the area of the diversion holes, on the one hand, ensure the diversion effect and avoid that the aperture is too small for the air flow to pass through, and on the other hand, further increase the working area, thereby further increasing the air volume and the air outlet efficiency.

[0015] Further, the diversion mesh cover includes a plurality of horizontal ribs and a plurality of vertical ribs, and the plurality of horizontal ribs and the plurality of vertical ribs are arranged perpendicular to and intersecting with each other to form a plurality of the diversion holes by splicing, and each horizontal rib and each vertical rib are connected to the spiral extension part.

[0016] The axial-flow air blade of the air conditioner provided by the embodiment of the present invention forms rectangular diversion holes by the staggered distribution of a plurality of horizontal ribs and vertical ribs, and both the horizontal ribs and the vertical ribs are connected to the spiral extension part, which can ensure the structural strength of the diversion mesh cover. At the same time, the rectangular diversion holes are also beneficial to the uniform array of a plurality of diversion holes and ensure the uniform distribution of the diversion holes.

[0017] Further, the diversion mesh cover is arranged at the air inlet side edge of the spiral extension part in the width direction.

[0018] The axial-flow air blade of the air conditioner provided by the embodiment of the present invention arranges the diversion mesh cover on the air inlet side of the spiral extension part, which can make the diversion mesh cover face the wind, and evenly send out the diverted gas through the rear air guiding channel, which can avoid the formation of local turbulence on both sides of the spiral extension part, ensure the stability of the air flow, and further ensure the stable axial air outlet.

[0019] Further, the diversion mesh cover is arranged at the central position of the spiral extension part in the width direction.

[0020] The axial-flow air blade of the air conditioner provided by the embodiment of the present invention arranges the diversion mesh cover at the central position of the spiral extension part, which can improve the supporting effect of the diversion mesh cover and ensure the structural stability of the diversion mesh cover and the spiral extension part.

[0021] Further, the cross section of the first airfoil root is in the shape of a first airfoil, the cross section of the second airfoil root is in the shape of a second airfoil, the cross section of the spiral extension part is in the shape of a third airfoil, and the chord length L1 of the first airfoil, the chord length L2 of the second airfoil, and the chord length L3 of the third airfoil are equal.

[0022] The axial-flow air blade of the air conditioner provided by the embodiment of the present invention sets the chord lengths of the first airfoil, the second airfoil, and the third airfoil to be equal structures, which can ensure that the width ranges of the first airfoil root, the second airfoil root, and the third airfoil root are the same, reduce the overall manufacturing difficulty, and at the same time ensure the structural stability.

[0023] An air conditioner includes an air conditioner body and the aforementioned axial-flow air blade of the air conditioner. A motor is installed in the air conditioner body, and the motor is in transmission connection with the rotating shaft. Description of the Drawings

[0024] Figure 1 This is a schematic structural diagram of the axial-flow fan blade of an air conditioner provided in the first embodiment of the present invention from a first perspective;

[0025] Figure 2 This is a schematic structural diagram of the axial-flow fan blade of an air conditioner provided in the first embodiment of the present invention from a second perspective;

[0026] Figure 3 This is a schematic structural diagram of the axial-flow fan blade of an air conditioner provided in the first embodiment of the present invention from a third perspective.

[0027] Description of the Reference Numerals:

[0028] 100 - Axial-flow fan blade of the air conditioner; 110 - Rotating shaft; 111 - Inlet end; 113 - Outlet end; 130 - Annular blade; 131 - Air guiding channel; 150 - First airfoil root; 151 - First airfoil; 170 - Second airfoil root; 171 - Second airfoil; 180 - Flow guiding mesh cover; 181 - Flow guiding hole; 183 - Horizontal rib; 185 - Vertical rib; 190 - Spiral extension; 191 - Third airfoil. Detailed Description of the Embodiment

[0029] In order to make the above-mentioned objects, features, and advantages of the present invention more obvious and understandable, the following provides a detailed description of the specific embodiments of the present invention with reference to the drawings.

[0030] First Embodiment

[0031] Refer to Figures 1 to 3 , this embodiment provides an axial-flow fan blade 100 of an air conditioner, which can improve the air outlet efficiency and suppress noise while increasing the air volume.

[0032] The air conditioner axial flow fan blade 100 provided in this embodiment includes a rotating shaft 110 and a plurality of annular blades 130, the rotating shaft 110 has an air inlet end 111 and an air outlet end 113 opposite to each other in the vertical direction, and the plurality of annular blades 130 are arranged around the periphery of the rotating shaft 110, each annular blade 130 includes a first wing-shaped root 150, a second wing-shaped root 170, a spiral extension 190 and a guide mesh cover 180, the first wing-shaped root 150 and the second wing-shaped root 170 are arranged at both ends of the spiral extension 190, and the spiral extension 190 is composed of the first wing-shaped root 150 and the second wing-shaped root 170. 150 spirally extends to the second wing-shaped root 170, the first wing-shaped root 150 is connected to the outer circumference of the rotating shaft 110 and is arranged close to the air inlet end 111, the second wing-shaped root 170 is connected to the outer circumference of the rotating shaft 110 and is arranged close to the air outlet end 113, and the first wing-shaped root 150, the spiral extension portion 190, the second wing-shaped root 170, and the rotating shaft 110 are jointly arranged to form an air guide channel 131, and the guide mesh cover 180 is arranged in the air guide channel 131 and is connected to the spiral extension portion 190, for guiding the gas in the air guide channel 131.

[0033] It is worth noting that the air-conditioning axial flow fan blade 100 in this embodiment is suitable for an air conditioner, which can be an air-conditioning outdoor unit, and a motor is installed in the air-conditioning outdoor unit, and the motor is connected to the rotating shaft 110 through a transmission connection, thereby driving the multiple annular blades 130 to rotate through the rotating shaft 110. During the rotation process, the first wing-shaped root 150, the second wing-shaped root 170 and the spiral extension 190 work together to achieve air supply.

[0034] It should be noted that the spiral extension of the spiral extension portion 190 in this embodiment means that the spiral extension portion 190 extends radially outward from the first wing-shaped root portion 150, and spirally folds, folds back after reaching the distal end, and finally extends to the second wing-shaped root portion 170. Preferably, the spiral extension portion 190 in this embodiment can extend from the first wing-shaped root portion 150 and spirally fold 160°-190° before folding back to the second wing-shaped root portion 170, and the first wing-shaped root portion 150, the spiral extension portion 190, the second wing-shaped root portion 170, and the rotating shaft 110 are jointly surrounded to form an air guide channel 131, and the air guide channel 131 can provide airflow during the rotation of the annular blade 130.

[0035] In this embodiment, a plurality of annular blades 130 are arranged on the periphery of the rotating shaft 110. Each annular blade 130 is composed of a first airfoil root 150, a second airfoil root 170, a spiral extension 190, and a flow guiding mesh cover 180. The first airfoil root 150 and the second airfoil root 170 are respectively fixed on the outer peripheral surface of the rotating shaft 110 and are integrally arranged at both ends of the spiral extension 190. The spiral extension 190 extends spirally and can form an air guiding channel 131 by surrounding it inside. The flow guiding mesh cover 180 is arranged in the air guiding channel 131 and is connected to the spiral extension 190, capable of guiding the gas in the air guiding channel 131. Compared with the prior art, by setting the first airfoil root 150, the spiral extension 190, and the second airfoil root 170, the present invention can increase the working area, which is beneficial to increasing the air volume. At the same time, by setting the flow guiding mesh cover 180, it can play a guiding role and further increase the working area, making the air flow more stable and ensuring more efficient axial air outlet.

[0036] In this embodiment, the flow guiding mesh cover 180 is arranged on the side of the spiral extension 190 close to the rotating shaft 110 and is spaced from the rotating shaft 110 to partially block the air guiding channel 131. Specifically, the flow guiding mesh cover 180 is arranged in the inner region of the spiral extension 190, that is, the region close to the rotating shaft 110. At the same time, the flow guiding mesh cover 180 is spaced from the rotating shaft 110, so as to ensure that the flow guiding mesh cover 180 does not completely cover the entire air guiding channel 131. By partially blocking the air guiding channel 131 with the flow guiding mesh cover 180 in this embodiment, on the one hand, due to the spiral extension of the spiral extension 190, the flow guiding mesh cover 180 is arranged close to the spiral extension 190 here, which can prevent the flow guiding mesh cover 180 from spirally extending from the first airfoil root 150 to the second airfoil root 170, reducing the forming difficulty of the flow guiding mesh cover 180. On the other hand, it avoids completely blocking the air guiding channel 131, which can prevent the flow guiding mesh cover 180 from causing excessive load on the fan, and at the same time can also increase the air volume, further ensuring more efficient axial air outlet.

[0037] Further, the blocking area of the flow guiding mesh cover 180 relative to the air guiding channel 131 is less than or equal to 1 / 2 of the flow area of the air guiding channel 131. Preferably, the blocking area of the air guiding mesh cover can be 1 / 3 of the flow area of the air guiding channel 131. By limiting the blocking area of the flow guiding mesh cover 180, it can further prevent the flow guiding mesh cover 180 from causing excessive load on the fan, and at the same time can also increase the air volume, further ensuring more efficient axial air outlet.

[0038] In this embodiment, a plurality of flow guiding holes 181 are formed in the flow guiding net cover 180, and the plurality of flow guiding holes 181 are arranged in an array for the gas at the edge of the air guiding channel 131 to pass through. Specifically, the opening directions of the plurality of flow guiding holes 181 are consistent with the air flow direction, which can achieve smooth air outlet. Moreover, the plurality of flow guiding holes 181 are arranged in an array, which can achieve the effect of uniform flow, improve the flow guiding effect of the flow guiding net cover 180, and further improve the air outlet efficiency.

[0039] In this embodiment, the flow guiding area of each flow guiding hole 181 is between 1 / 30 and 1 / 10 of the flow area of the air guiding channel 131. Preferably, the flow guiding area of each flow guiding hole 181 is 1 / 20 of the flow area of the air guiding channel 131. By limiting the area of the flow guiding holes 181, on the one hand, the flow guiding effect can be ensured to avoid the aperture being too small for the air flow to pass through, and on the other hand, the working area can be further increased, thereby further increasing the air volume and the air outlet efficiency.

[0040] The flow guiding net cover 180 includes a plurality of horizontal ribs 183 and a plurality of vertical ribs 185. The plurality of horizontal ribs 183 and the plurality of vertical ribs 185 are arranged perpendicular to each other and intersect to form a plurality of flow guiding holes 181. Each horizontal rib 183 and each vertical rib 185 are connected to the spiral extension part 190. Specifically, the horizontal ribs 183 can be arranged in the horizontal direction, and the vertical ribs 185 can be arranged in the vertical direction. The rectangular flow guiding holes 181 are formed by the staggered distribution of the plurality of horizontal ribs 183 and vertical ribs 185, and both the horizontal ribs 183 and the vertical ribs 185 are connected to the spiral extension part 190, which can ensure the structural strength of the flow guiding net cover 180. At the same time, the rectangular flow guiding holes 181 are also beneficial to the array uniform distribution of the plurality of flow guiding holes 181 and ensure the uniform distribution of the flow guiding holes 181.

[0041] It should be noted that in this embodiment, the horizontal ribs 183 and the vertical ribs 185 are integrally provided and integrally provided on the spiral extension part 190, so as to realize the integral injection molding of the whole configuration. Of course, in other preferred embodiments of the present invention, the flow guiding net cover 180 and the annular blade 130 can also be separately formed, and fixed by bonding or welding means during installation.

[0042] In this embodiment, the flow guiding net cover 180 is arranged at the air inlet side edge of the spiral extension part 190 in the width direction. Arranging the flow guiding net cover 180 on the air inlet side of the spiral extension part 190 can make the flow guiding net cover 180 face the wind, and uniformly send out the guided gas from the rear air guiding channel 131, which can avoid the formation of local turbulence on both sides of the spiral extension part 190, ensure the stability of the air flow, and thus ensure the stable axial air outlet.

[0043] In other preferred embodiments of the present invention, the flow guiding mesh cover 180 can also be arranged at the central position of the spiral extension part 190 in the width direction. Arranging the flow guiding mesh cover 180 at the central position of the spiral extension part 190 can improve the supporting effect of the flow guiding mesh cover 180 and ensure the structural stability of the flow guiding mesh cover 180 and the spiral extension part 190.

[0044] In this embodiment, referring to Figure 3 , Figure 3 the airfoil structure diagrams of each section are shown. The cross-section of the first airfoil root 150 is the first airfoil 151, the cross-section of the second airfoil root 170 is the second airfoil 171, and the cross-section of the spiral extension part 190 is the third airfoil 191. The chord lengths L1 of the chord X1 of the first airfoil 151, L2 of the chord X2 of the second airfoil 171, and L3 of the chord X3 of the third airfoil 191 are equal. Specifically, the chord X1 of the first airfoil 151 refers to the straight line connecting the two endpoints of the first airfoil 151. Similarly, the chord X2 of the second airfoil 171 refers to the straight line connecting the two endpoints of the second airfoil 171, and the chord X3 of the third airfoil 191 is the straight line connecting the two endpoints of the third airfoil 191. The length of the chord of the airfoil can represent the width of the airfoil. Setting the chord lengths of the first airfoil 151, the second airfoil 171, and the third airfoil 191 to be equal can ensure that the width ranges of the first airfoil root 150, the second airfoil root 170, and the root of the third airfoil 191 are the same, reducing the overall manufacturing difficulty and ensuring the structural stability at the same time.

[0045] It should be noted that in this embodiment, the first airfoil root 150 and the second airfoil root 170 are arranged at intervals on the outer peripheral surface of the rotating shaft 110, and the difference between the angle between the chord X1 of the first airfoil 151 and the horizontal direction and the angle between the chord X2 of the second airfoil 171 and the horizontal direction is within 30°, preferably within 10°. This can ensure that the range difference of the installation angles of the first airfoil root 150 and the second airfoil root 170 is not large, thereby ensuring the air volume and reducing the noise.

[0046] In summary, this embodiment provides an axial-flow airfoil 100 for an air conditioner. A plurality of annular blades 130 are arranged on the periphery of a rotating shaft 110. Each annular blade 130 is composed of a first airfoil root 150, a second airfoil root 170, a spiral extension 190, and a flow guide mesh cover 180. The first airfoil root 150 and the second airfoil root 170 are respectively fixed on the outer peripheral surface of the rotating shaft 110 and are integrally arranged at both ends of the spiral extension 190. The spiral extension 190 spirally extends and can form an air guide channel 131 by surrounding it inside. The flow guide mesh cover 180 is arranged in the air guide channel 131 and is connected to the spiral extension 190, and can realize the flow guiding of the gas in the air guide channel 131. Compared with the prior art, by setting the first airfoil root 150, the spiral extension 190, and the second airfoil root 170, the present invention can increase the working area, which is beneficial to increasing the air volume. At the same time, by setting the flow guide mesh cover 180, it can play a role in flow guiding and further increase the working area, making the air flow more stable and ensuring more efficient axial air outlet.

[0047] Second Embodiment

[0048] This embodiment provides an air conditioner, including an air conditioner body and an axial-flow airfoil 100 for an air conditioner. The basic structure, principle, technical effects generated by the axial-flow airfoil 100 for an air conditioner are the same as those of the first embodiment. For a brief description, for the parts not mentioned in this embodiment, reference can be made to the corresponding content in the first embodiment.

[0049] The air conditioner provided in this embodiment includes an air conditioner body and an axial-flow airfoil 100 for an air conditioner. The axial-flow airfoil 100 for an air conditioner includes a rotating shaft 110 and a plurality of annular blades 130. The rotating shaft 110 has an air inlet end 111 and an air outlet end 113 opposite to each other. The plurality of annular blades 130 are arranged around the periphery of the rotating shaft 110. Each annular blade 130 includes a first airfoil root 150, a second airfoil root 170, a spiral extension 190, and a flow guide mesh cover 180. The first airfoil root 150 and the second airfoil root 170 are arranged at both ends of the spiral extension 190. The spiral extension 190 spirally extends from the first airfoil root 150 to the second airfoil root 170. The first airfoil root 150 is connected to the outer peripheral surface of the rotating shaft 110 and is arranged close to the air inlet end 111. The second airfoil root 170 is connected to the outer peripheral surface of the rotating shaft 110 and is arranged close to the air outlet end 113. Moreover, the first airfoil root 150, the spiral extension 190, the second airfoil root 170, and the rotating shaft 110 jointly form an air guide channel 131. The flow guide mesh cover 180 is arranged in the air guide channel 131 and is connected to the spiral extension 190 for guiding the gas in the air guide channel 131. A motor is installed in the air conditioner body, and the motor is in transmission connection with the rotating shaft 110.

[0050] In this embodiment, the air conditioner may be an outdoor unit of the air conditioner. The motor inside the outdoor unit of the air conditioner can drive the rotation of the rotating shaft 110, and then drive the rotation of the annular blade 130 to achieve axial air outlet.

[0051] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims

1. An axial flow fan blade for an air conditioner, characterized in that, It includes a rotating shaft (110) and a plurality of annular blades (130). The rotating shaft (110) has opposite air inlet ends (111) and air outlet ends (113). A plurality of the annular blades (130) are arranged around the periphery of the rotating shaft (110). Each annular blade (130) includes a first airfoil root (150), a second airfoil root (170), a helical extension (190) and a flow guiding mesh cover (180). The first airfoil root (150) and the second airfoil root (170) are arranged at both ends of the helical extension (190). The helical extension (190) helically extends from the first airfoil root (150) to the second airfoil root (170). The first airfoil root (150) is connected to the outer peripheral surface of the rotating shaft (110) and is arranged near the air inlet end (111). The second airfoil root (170) is connected to the outer peripheral surface of the rotating shaft (110) and is arranged near the air outlet end (113). And the first airfoil root (150), the helical extension (190), the second airfoil root (170) and the rotating shaft (110) jointly enclose a wind guiding channel (131). The flow guiding mesh cover (180) is arranged in the wind guiding channel (131) and is connected to the helical extension (190) for guiding the gas in the wind guiding channel (131).

2. The axial flow fan blade for an air conditioner according to claim 1, wherein The flow guiding mesh cover (180) is arranged on the side of the helical extension (190) close to the rotating shaft (110) and is spaced from the rotating shaft (110) to partially block the wind guiding channel (131).

3. The axial-flow air blade of the air conditioner according to claim 2, wherein The blocking area of the flow guiding mesh cover (180) relative to the wind guiding channel (131) is less than or equal to 1 / 2 of the flow area of the wind guiding channel (131).

4. The axial flow fan blade for an air conditioner according to claim 2, wherein, A plurality of flow guiding holes (181) are formed in the flow guiding mesh cover (180). The plurality of flow guiding holes (181) are arranged in an array for the gas at the edge of the wind guiding channel (131) to pass through.

5. The axial flow fan blade of an air conditioner according to claim 4, characterized in that, The flow guiding area of each flow guiding hole (181) is between 1 / 30 and 1 / 10 of the flow area of the wind guiding channel (131).

6. The axial flow fan blade for an air conditioner according to claim 4, characterized in that, The flow guiding mesh cover (180) includes a plurality of horizontal ribs (183) and a plurality of vertical ribs (185). The plurality of horizontal ribs (183) and the plurality of vertical ribs (185) are arranged perpendicular to and staggered with each other to splice and form the plurality of flow guiding holes (181). Each horizontal rib (183) and each vertical rib (185) are connected to the helical extension (190).

7. The axial flow fan blade for an air conditioner according to claim 2, characterized in that, The flow guiding mesh cover (180) is arranged at the air inlet side edge of the helical extension (190) in the width direction.

8. The axial-flow air blade of an air conditioner according to claim 2, wherein, The flow guiding mesh cover (180) is arranged at the central position of the helical extension (190) in the width direction.

9. The axial flow fan blade of an air conditioner according to claim 1, characterized in that, The cross-section of the first airfoil root (150) is in the shape of a first airfoil (151), the cross-section of the second airfoil root (170) is in the shape of a second airfoil (171), the cross-section of the spiral extension (190) is in the shape of a third airfoil (191), and the chord lengths L1 of the first airfoil (151), the chord length L2 of the second airfoil (171), and the chord length L3 of the third airfoil (191) are equal.

10. An air conditioner, characterized in that, It includes an air conditioner body and the axial-flow airfoil of the air conditioner according to any one of claims 1-9. A motor is installed in the air conditioner body, and the motor is in transmission connection with the rotating shaft (110).

Images