CN109139545B - Blade, cross-flow fan blade and air conditioner - Google Patents

Blade, cross-flow fan blade and air conditioner Download PDF

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Publication number
CN109139545B
CN109139545B CN201811352186.1A CN201811352186A CN109139545B CN 109139545 B CN109139545 B CN 109139545B CN 201811352186 A CN201811352186 A CN 201811352186A CN 109139545 B CN109139545 B CN 109139545B
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China
Prior art keywords
blade
blades
cross
flow fan
cotyledon
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CN201811352186.1A
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CN109139545A (en
Inventor
黄美玲
邹建煌
黄洪森
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN201811352186.1A priority Critical patent/CN109139545B/en
Publication of CN109139545A publication Critical patent/CN109139545A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention provides a wind deflector blade, a cross-flow fan blade and an air conditioner, wherein the blade (1) is used for the cross-flow fan blade, the blade (1) comprises two end parts which are oppositely arranged along a first direction, the first direction is the length direction of the cross-flow fan blade, and concave parts and convex parts which are alternately arranged along the width direction of the blade (1) are formed on the surface of the blade (1) between the two end parts. Through concave part and convex part can change the air current distribution on blade (1) surface, avoid the vortex to produce, reduce the noise that the air current separation on blade (1) surface and the interaction between blade (1) and the casing produced, effectively improve the comfort level of air conditioner.

Description

Blade, cross-flow fan blade and air conditioner
Technical Field
The invention belongs to the technical field of air conditioning, and particularly relates to a blade, a cross-flow fan blade and an air conditioner.
Background
The existing split air conditioner mainly comprises a cross-flow fan blade, a heat exchanger, a volute tongue, an inlet, an outlet and other structures, wherein the cross-flow fan blade and the heat exchanger work in a combined mode, air flows enter the cross-flow fan blade after heat exchange of the heat exchanger to rotate to do work and then is supplied to the indoor side through the outlet, and when the cross-flow fan blade rotates, the air flows and the volute tongue continuously interact to generate rotary noise, so that the use experience of a user is affected.
Disclosure of Invention
Therefore, the invention aims to solve the technical problem of providing the blade, the cross-flow fan blade and the air conditioner, which can reduce noise generated when the cross-flow fan blade rotates and improve the use experience of a user.
In order to solve the above problems, the present invention provides a blade for a cross-flow fan, the blade including two ends disposed opposite to each other in a first direction, the first direction being a longitudinal direction of the cross-flow fan, a surface of the blade between the two ends forming concave portions and convex portions alternately arranged in a width direction of the blade.
Preferably, the blade has a hollow cavity for receiving the heat exchange medium.
Preferably, the blade comprises at least two cotyledon blades connected successively along a first predetermined path, the cotyledon blades being shaped to extend in a first direction, and a recess being formed between the outer surfaces of adjacent two cotyledon blades.
Preferably, the center line of the cross-section of at least two sub-blades forms an arc segment.
Preferably, the arc segment is a single arc or multiple arcs.
Preferably, the recess comprises a connecting bridge, by means of which two adjacent sub-blades are connected to each other.
Preferably, the bridge has an inner surface and an outer surface, the width of the outer surface of the bridge between adjacent sub-blades of the same set being greater than the width of the inner surface.
Preferably, the width of the outer surface of the connecting bridge is 0 mm-1 mm; and/or the width of the inner surface of the connecting bridge is 0 mm-0.4 mm.
Preferably, at least one of the sub-blades has a hollow cavity.
Preferably, each of the cotyledons has a hollow cavity, respectively.
Preferably, at least two of the sub-blades have hollow cavities, the hollow cavities of the sub-blades not communicating with each other.
Preferably, at least two of the sub-blades have hollow cavities, the hollow cavities of at least two of the sub-blades being in communication with each other.
Preferably, the cross section of the sub-blade is circular, elliptical or polygonal.
Preferably, when the cross section of the sub-blade is circular, the diameter of the cross section of the sub-blade is 1mm to 5mm.
Preferably, the overall dimensions of each sub-blade are identical.
Preferably, the external dimensions of at least two sub-blades are different.
Preferably, the number of sub-blades is 5 to 10.
Preferably, the cotyledons are welded or clamped.
According to another aspect of the invention, a cross-flow fan blade is provided, comprising the blade.
Preferably, the cross-flow fan blade further comprises: the left end cover, the right end cover and the snap ring, the snap ring includes a plurality of card holes, the shape in card hole and blade assorted, and the blade wears to establish in card hole, and the both ends of blade are connected respectively on left end cover and right end cover.
Preferably, the number of the snap rings is more than two, and the more than two snap rings are arranged between the left end cover and the right end cover at intervals.
Preferably, the snap ring is position adjustable along the length of the blade.
Preferably, the number of the snap rings is more than three, the adjacent snap rings form intervals, and the adjacent intervals are unequal.
Preferably, the relationship between the number N of snap rings and the distance L between the left end cover and the right end cover satisfies: L/(N+1) is more than or equal to 200mm.
According to another aspect of the present invention, there is provided an air conditioner including the above cross-flow fan blade.
The blade provided by the invention is used in a cross-flow fan blade, the blade comprises two end parts which are oppositely arranged along a first direction, concave parts and convex parts which are alternately distributed along the width direction of the blade are formed on the surface of the blade between the two end parts, the blade is provided with the concave parts and the convex parts instead of smooth surfaces, the airflow distribution on the surface of the blade can be changed through the concave parts and the convex parts, vortex generation is avoided, noise generated by airflow separation on the surface of the blade and interaction between the blade and a shell is reduced, and the comfort level of an air conditioner is effectively improved.
Drawings
Fig. 1 is a schematic structural view of an indoor unit of a prior art air conditioner;
FIG. 2 is a schematic structural view of a cross-flow fan blade in the prior art;
FIG. 3 is a schematic diagram of the explosive structure of FIG. 2;
FIG. 4 is a schematic view of a middle blade structure of a cross-flow fan blade in the prior art;
FIG. 5 is a front view of FIG. 4;
FIG. 6 is a schematic structural diagram of a cross-flow fan blade according to an embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view of a blade according to an embodiment of the invention;
FIG. 8 is a schematic cross-sectional view of a blade according to another embodiment of the invention;
FIG. 9 is a partial schematic view of the structure of FIG. 7;
FIG. 10 is a partial schematic view of the structure of FIG. 7;
FIG. 11 is a schematic cross-sectional view of a blade according to yet another embodiment of the present invention;
FIG. 12 is a schematic diagram of a snap ring structure of a cross-flow fan blade according to an embodiment of the present invention;
FIG. 13 is a schematic view illustrating a cross-flow fan blade according to another embodiment of the present invention;
Fig. 14 is an isometric view of a cross-flow fan blade according to another embodiment of the present invention.
The reference numerals are expressed as:
1. A blade; 11. a hollow cavity; 12. a sub-leaf; 13. a connecting bridge; 13a, an inner surface; 13b, an outer surface; 14. an arc segment; 2. a left end cover; 3. a right end cover; 4. a clasp; 41. a clamping hole; 42. a through hole;
10. A heat exchanger; 20. through-flow fan blades; 21. middle section fan blades; 30. a volute tongue; 40. an inlet; 50. and an outlet.
Detailed Description
As shown in fig. 1, fig. 1 is a schematic structural diagram of an indoor unit of an air conditioner in the prior art; the air conditioner indoor unit in the prior art mainly comprises a heat exchanger 10, a cross-flow fan blade 20, a volute tongue 30, an inlet 40 and an outlet 50, wherein the heat exchanger 10 is used for exchanging heat, the cross-flow fan blade 20 is used for doing work on air flow and sending the air flow to a space in a rotating way, and the functions of the cross-flow fan blade 20 and the heat exchanger 10 are completed independently.
Referring to fig. 2 to 5, fig. 2 is a schematic structural diagram of the through-flow fan blade; FIG. 3 is a schematic diagram of an explosion structure of a cross-flow fan blade; fig. 4 and fig. 5 are schematic views of the middle section fan blade structure under different angles of view. The cross-flow fan blade 20 commonly used in the prior art comprises at least more than 5 middle-section fan blades 21, a left end cover and a right end cover. The plurality of middle section fan blades 21 are welded one by one and then fixed between the left end cover and the right end cover, each middle section fan blade 21 comprises a plurality of blades and a disc body, the plurality of blades are arranged at certain angle intervals along the periphery of the circular ring, and the blades are single smooth outer surfaces.
The indoor unit adopting the structure can generate diversion to the airflow and do work in the rotating process of the blades, so that certain friction collision or separation and falling of the airflow are generated between the blades and the airflow, and the smooth blade surface has obvious influence on the performance and noise of the indoor unit. In addition, the separate and independent design of the cross-flow fan blade 20 and the heat exchanger 10 greatly limits the size of the indoor unit for a developer.
Based on the above problems, the applicant has specifically proposed the present solution.
In order to solve the above-mentioned problems, referring to fig. 6 and 7 together, the present invention first provides a blade 1 for a through-flow fan, wherein the blade 1 includes two ends disposed opposite to each other along a first direction, the first direction being a longitudinal direction of the through-flow fan, and a surface of the blade 1 between the two ends forms concave portions and convex portions alternately arranged along a width direction of the blade 1. Wherein the first direction is transverse to the view direction shown in fig. 6.
The blade 1 provided by the invention is used in a through-flow fan blade, the blade 1 comprises two end parts which are oppositely arranged along a first direction, concave parts and convex parts which are alternately distributed along the width direction of the blade 1 are formed on the surface of the blade 1 between the two end parts, and the blade 1 provided by the invention is provided with the concave parts and the convex parts instead of smooth surfaces, so that the airflow distribution on the surface of the blade 1 can be changed through the concave parts and the convex parts, vortex generation is avoided, the noise generated by the airflow separation on the surface of the blade 1 and the interaction between the blade 1 and a shell is reduced, and the comfort degree of an air conditioner is effectively improved.
The blade 1 is provided with a plurality of modes, preferably, as shown in fig. 8, the blade 1 is provided with a hollow cavity 11, the hollow cavity 11 is used for containing heat exchange media, the heat exchange media are arranged in the hollow cavity 11 of the blade 1, and the work load of an evaporator in an air conditioner can be shared, so that the evaporator is designed to be smaller in size, even the evaporator is omitted, the fan blade air supply and heat exchange integration can be realized, the heat exchange area of the blade 1 can be increased by the concave part and the convex part on the surface of the blade 1, and the heat exchange effect of the blade 1 is improved.
The recess and the protrusion may be formed in various ways, and in some alternative embodiments, the blade 1 includes at least two sub-blades 12 connected in succession along a first predetermined path, the sub-blades 12 being formed by extending in the first direction, the recess being formed between the outer surfaces 13b of two adjacent sub-blades 12, the sub-blades 12 themselves forming the protrusion.
In these alternative embodiments, the manufacturing of the blade 1 can be simplified by connecting a plurality of sub-blades 12 one after the other along a first predetermined path to form the blade 1, and the dimensions of the recesses and protrusions can be changed by changing the cross-sectional dimensions of the sub-blades 12 and the arrangement or spacing between adjacent two sub-blades 12. The cross section of the stator blade 12 refers to the cross section of the stator blade 12 in the width direction thereof.
The first predetermined path may be arbitrarily set, for example, a connecting line of the cross-section centers of at least two sub-blades 12 forms arc segments 14, and the first predetermined path is formed by these arc segments 14. As shown in fig. 9, fig. 9 is a schematic partial structure of fig. 8, and the arc segments 14 may be a single arc segment 14, that is, R1 and R2 may be the same; or the arc segments 14 are multi-segment arc segments 14, i.e., R1 and R2 may be different. When the arc segments 14 are not circular arcs, the curvatures of the arc segments 14 may be the same or different.
As shown in fig. 7 and 9, the structure of the arc segment 14 is shown by dotted lines, and it should be understood that these dotted lines do not limit the structure of the blade 1, but merely illustrate the shape of the arc segment 14.
Adjacent two sub-blades 12 are connected to each other by a connecting bridge 13, and the shapes of the concave and convex portions can be changed by changing the connecting positions of the connecting bridge 13 and the sub-blades 12 and the size of the connecting bridge 13 itself.
As shown in FIG. 10, the recess includes a connecting bridge 13, and the width of the outer surface 13b of the connecting bridge 13 between two adjacent sub-blades 12 is larger than the width of the inner surface 13a, that is, L1 is equal to or larger than L6, L2 is equal to or larger than L7, L3 is equal to or larger than L8, L4 is equal to or larger than L9, and L5 is equal to or larger than L10. The width of the outer surface 13b refers to the extension length of the outer surface 13b of the connecting bridge 13, and the width of the inner surface 13a refers to the extension length of the inner surface 13a of the connecting bridge 13. The connecting bridge 13 extends along a first preset path, the first preset path is an arc, the outer surface 13b of the connecting bridge 13 refers to the surface of the connecting bridge 13 close to the outer side of the arc, and similarly, the inner surface 13a of the connecting bridge 13 refers to the surface close to the inner side of the arc. The width of the outer surface 13b of the connecting bridge 13 is greater than the width of the inner surface 13a, so that the blade 1 finally formed by the cotyledon blades 12 connected by the connecting bridge 13 is entirely arc-shaped and the bending direction of the blade 1 is uniform.
It will be appreciated that the extension of the outer surface 13b of the bridge 13 and the extension of the inner surface 13a of the bridge 13 are not limited herein. Preferably, the width of the outer surface 13b of the connecting bridge 13 is 0mm to 1mm; and/or the inner surface 13a of the connecting bridge 13 has a width of 0mm to 0.4mm, so that the size of the blade 1 formed by the connection of the sub-blades 12 by the connecting bridge 13 is within a reasonable range.
At least one of the sub-vanes 12 has a hollow cavity 11 to accommodate a heat exchange medium. It will be appreciated that all of the sub-blades 12 may have each hollow cavity 11, or at least two of the sub-blades 12 may have hollow cavities 11. When the hollow cavities 11 in the blade 1 are two or more, the two or more hollow cavities 11 may or may not communicate with each other.
The shape of the hollow cavity 11 is not limited herein, and the cross section of the hollow cavity 11 may be triangular, circular, elliptical or polygonal. When the hollow cavity 11 is two or more, the cross-sectional shapes of the two or more hollow cavities 11 may be the same or different, and the cross-sectional sizes of the two or more hollow cavities 11 may be the same or different.
The shape of the sub-blades 12 is not limited herein, and the cross section of the sub-blades 12 may be circular, elliptical, or polygonal. Preferably, the cross section of the sub-blade 12 is circular, so that the production and the manufacturing of the sub-blade 12 are facilitated, and the diameter of the sub-blade 12 with the circular cross section is 1 mm-5 mm, namely the size of D1 is 1 mm-5 mm.
As shown in fig. 7 and 11, the blade 1 includes two or more cotyledon blades 12, and the external dimensions of the two or more cotyledon blades 12 may be the same or different. Preferably, one blade 1 is formed by connecting 5 to 10 sub-blades 12 one after the other. The sub-blades 12 may be welded or fastened to each other.
The invention further provides a cross-flow fan blade, which comprises the blade 1.
Referring to fig. 12 to 14, the through-flow fan further includes: the left end cover 2, the right end cover 3 and the snap ring 4, the snap ring 4 includes a plurality of card holes 41, the shape of card hole 41 and blade 1 assorted, and blade 1 wears to establish in card hole 41, and the both ends of blade 1 are connected respectively on left end cover 2 and right end cover 3. The blade 1 can be clamped between the left end cover 2 and the right end cover 3 only through the clamping ring 4, so that the production and the manufacture of the cross-flow fan blade are simplified.
The blade 1 and the left end cover 2 can be welded, riveted or screwed.
In order to save materials and simplify the structure of the clamping ring 4, a through hole 42 is further provided inside the clamping ring 4.
The number of the snap rings 4 can be more than two, and the more than two snap rings 4 are arranged between the left end cover 2 and the right end cover 3 at intervals. By adding the snap ring 4, the stability of the relative positions between the blade 1 and the left and right caps 2 and 3 can be improved. Meanwhile, the radial distance between the whole cross-flow fan and other parts in the air conditioner can be changed, so that the effect of improving noise is achieved.
The position of the clamping ring 4 along the length direction of the blade 1 is adjustable, and the radial distance between any position of the clamping ring 4 along the length direction of the cross-flow fan and other parts in the air conditioner can be changed by adjusting the position of the clamping ring, so that the noise improving effect is better.
As shown in fig. 13 and 14, when the number of the snap rings 4 is three or more, a space is formed between adjacent snap rings 4, and the adjacent spaces are not equal. Adjacent intervals are different, namely A1 is not equal to A2 is not equal to A3 is not equal to A4, the distribution of the clamping rings 4 in the length direction of the cross-flow fan is uneven, and the radial interval between the blade length direction and the volute tongue can be changed due to the unequal intervals between the clamping rings 4, so that noise is further reduced.
The relationship between the number N of snap rings 4 and the distance L between the left end cover 2 and the right end cover 3 satisfies: L/(N+1) is more than or equal to 200mm. The distance L may be regarded as the length of the cross-flow fan.
As an exemplary embodiment, the diameter of the blade of the through-flow fan is 98mm, the number of the sub-blades 12 in the blade 1 is 6, the shape of the sub-blades 12 is a circle, the diameter D 0 of the sub-blades 12=3 mm, the extension width L 1＝L2＝L3＝L4＝L5 of the outer surface 13b of each connecting bridge 13=0.39 mm, the extension width L 6＝L7＝L8＝L9＝L10 of the inner surface 13a13a of each connecting bridge 13=0.18 mm, the central line of the sub-blades 12 is a single circular arc, that is, the first preset path is a circular arc, the radius of the circular arc is R 1 =12.15 mm, the total length l=600 mm of the blade, and the number N of the snap rings 4=2. The cross section of the hollow cavity 11 is circular, each sub blade 12 is provided with the hollow cavity 11, the diameter d 0 = 1.8mm of the hollow cavity 11, the air quantity and the noise level of the through-flow fan blade are tested by comparing the through-flow fan blade with the existing through-flow fan blade, the air quantity of the through-flow fan blade can be basically consistent with the existing fan blade, and the noise is reduced by more than 1 dBA.
TABLE 1 comparison of inventive Cross-flow Fan blade and existing Cross-flow fan blade
Scheme for the production of a semiconductor device Air volume m 3/h Noise dB (A) Power of
Existing cross-flow fan blade 405 44.3 27.8
The invention relates to a cross-flow fan blade 400 43.1 27.6
Meanwhile, the hollow cavity 11 of the sub-blade 12 is filled with water, the water cooling capability test of the whole system is carried out on the indoor unit shell, the air quantity of the indoor unit is 400m3/h under the condition that the evaporator structure is reduced and the volume of the indoor unit is reduced by more than 1/3, the refrigerating capability is about 2000w, the refrigerating requirement of a small 1P machine type can be met, and the air quantity of the indoor unit is increased to meet the requirements of various air conditioning capabilities.
A third embodiment of the present invention provides an air conditioner, including the above cross-flow fan blade.
It will be readily appreciated by those skilled in the art that the above advantageous ways can be freely combined and superimposed without conflict.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.

Claims (23)

1. The blade is used for a cross-flow fan blade, and is characterized in that the blade (1) comprises two end parts which are oppositely arranged along a first direction, the first direction is the length direction of the cross-flow fan blade, and the blade (1) comprises a concave inner surface (13 a) and a convex outer surface (13 b); the inner surface (13 a) and the outer surface (13 b) of the blade (1) between the two end portions each form concave and convex portions alternately arranged in the width direction of the blade (1);
The blade (1) comprises at least two independent cotyledon blades (12) which are connected in sequence along a first preset path, the cotyledon blades (12) are formed in an extending mode along the first direction, and the concave portions are formed between the outer surfaces (13 b) of two adjacent cotyledon blades (12);
The recess comprises a connecting bridge (13), wherein two adjacent cotyledons (12) are connected with each other through the connecting bridge (13).
2. Blade according to claim 1, characterized in that the blade (1) has a hollow cavity (11), which hollow cavity (11) is intended to accommodate a heat exchange medium.
3. Blade according to claim 1, wherein the centre line of the cross-section of at least two of the cotyledon blades (12) forms an arc segment (14).
4. A blade according to claim 3, wherein the camber line (14) is a single camber line or a plurality of camber lines.
5. Blade according to claim 1, characterized in that the connecting bridge (13) has an inner surface (13 a) and an outer surface (13 b), the width of the outer surface (13 b) of the connecting bridge (13) between adjacent sub-blades (12) of the same group being larger than the width of the inner surface (13 a).
6. Blade according to claim 5, characterized in that the width of the outer surface (13 b) of the connecting bridge (13) is 0-1 mm; and/or the width of the inner surface (13 a) of the connecting bridge (13) is 0 mm-0.4 mm.
7. Blade according to claim 2, wherein at least one of the cotyledon blades (12) has the hollow cavity (11).
8. Blade according to claim 7, characterized in that each of the sub-blades (12) has a hollow cavity (11) respectively.
9. Blade according to claim 7, characterized in that at least two of the cotyledon blades (12) have the hollow cavities (11), the hollow cavities (11) of the cotyledon blades (12) not communicating with each other.
10. Blade according to claim 7, characterized in that at least two of the cotyledon blades (12) have the hollow cavities (11), the hollow cavities (11) of at least two of the cotyledon blades (12) being in communication with each other.
11. Blade according to claim 1, wherein the cross section of the cotyledon blade (12) is circular, oval or polygonal.
12. The blade according to claim 11, wherein the cross section of the cotyledon blade (12) is circular, and the diameter of the cross section of the cotyledon blade (12) is 1mm to 5mm.
13. Blade according to claim 1, wherein the sub-blades (12) have the same external dimensions.
14. Blade according to claim 1, wherein at least two of the cotyledon blades (12) differ in external dimensions.
15. Blade according to claim 1, wherein the number of cotyledon blades (12) is 5-10.
16. Blade according to claim 1, characterized in that the cotyledon blades (12) are welded or clamped between them.
17. A through-flow fan blade comprising a blade, characterized in that the blade (1) is a blade (1) according to any one of claims 1-16.
18. The through-flow fan blade of claim 17, further comprising: left end cover (2), right-hand member lid (3) and snap ring (4), snap ring (4) are including a plurality of draw-in holes (41), the shape of draw-in hole (41) with blade (1) assorted, blade (1) wear to establish in draw-in hole (41), the both ends of blade (1) are connected respectively left end cover (2) with on right-hand member lid (3).
19. The through-flow fan blade according to claim 18, wherein the number of the snap rings (4) is two or more, and the two or more snap rings (4) are arranged between the left end cover (2) and the right end cover (3) at intervals.
20. The cross-flow fan blade according to claim 18, characterized in that the position of the snap ring (4) along the length direction of the blade (1) is adjustable.
21. The through-flow fan blade according to claim 20, wherein the number of the snap rings (4) is more than three, and the adjacent snap rings (4) are spaced apart at different intervals.
22. The through-flow fan blade according to claim 19, wherein the relation between the number N of snap rings (4) and the distance L between the left end cover (2) and the right end cover (3) is as follows: L/(N+1) is more than or equal to 200mm.
23. An air conditioner comprising a cross-flow fan blade, wherein the cross-flow fan blade is as claimed in any one of claims 17 to 22.
CN201811352186.1A 2018-11-14 2018-11-14 Blade, cross-flow fan blade and air conditioner Active CN109139545B (en)

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KR20210108250A (en) * 2020-02-25 2021-09-02 엘지전자 주식회사 A Cross Fan

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CN208966695U (en) * 2018-11-14 2019-06-11 珠海格力电器股份有限公司 Blade, through-flow fan blade and air conditioner

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