Cross-flow fan blade assembly and air conditioner with same

Abstract

The application provides a cross-flow fan blade assembly and an air conditioner with the same. The cross-flow fan blade assembly comprises a cross-flow fan blade and guide ribs. The cross-flow fan blade comprises a first end cover, a second end cover and a blade segment arranged between the first end cover and the second end cover. The guide ribs are in a spiral arc structure and comprise a plurality of guide ribs. The plurality of guide ribs are arranged on an end surface of the first end cover away from the blade segment in a circumferential direction. The structure is simple. The extension direction of the guide ribs is consistent with the air outlet direction of the cross-flow fan blade. The air flow is smooth. The temperature difference between the two end surfaces of the first end cover is reduced. Condensation water is avoided. The first end cover is formed with a plurality of flow-through grooves. The flow-through grooves are in an arc structure. The air flow between the two end surfaces of the first end cover is circulated. In combination with the guide ribs, the temperature difference between the two end surfaces of the first end cover is reduced. The dew point temperature of the end surface of the first end cover away from the blade segment is reduced or eliminated. Condensation water is less formed or not formed. Finally, the air conditioner meets the condensation standard requirement. Safety hazards are avoided.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of fan equipment, and particularly relates to a cross-flow fan blade assembly and an air conditioner with the same. BACKGROUND

[0002] The cross-flow fan blade has been widely applied to heat exchange equipment such as air conditioners, warm air machines and cold air fans due to its simple structure, small volume, stable air supply volume and long air supply distance. The cross-flow fan blade comprises a first end cover, a second end cover and a plurality of blade segments arranged between the first end cover and the second end cover. The first end cover is provided with a step, and the step is drivingly connected with an output shaft of a motor. When the cross-flow fan blade is arranged on a bottom shell of the heat exchange equipment, a gap is formed between the motor and the bottom shell. The first end cover has a certain thickness. When the cross-flow fan blade operates, the end surfaces of the first end cover are not easy to reach the same temperature or a small temperature difference. Therefore, the end surface of the first end cover close to the motor is easy to reach a condensation point to generate condensation water. The condensation water enters an air duct through the gap between the motor and the bottom shell, which is easy to cause safety hazards. The condensation water enters a room through the air duct, which reduces the experience of users. SUMMARY

[0003] In view of this, the present application provides a cross-flow fan blade assembly and an air conditioner with the same to solve the problems of easy condensation on the outer surface of the first end cover of the cross-flow fan blade and easy accumulation of condensation water between the motor and the bottom shell in the prior art.

[0004] The present application provides a cross-flow fan blade assembly, which comprises a cross-flow fan blade and guide ribs. The cross-flow fan blade comprises a first end cover, a second end cover and blade segments arranged between the first end cover and the second end cover. The guide ribs are arranged on the end surface of the first end cover away from the blade segments along the circumference of the first end cover. Each guide rib is a spiral arc structure extending along the end surface of the first end cover.

[0005] Further, each guide rib comprises an outer end close to the outer edge of the first end cover and an inner end close to the center of the first end cover. The guide ribs comprise first guide ribs and second guide ribs arranged in sequence along the rotation direction of the guide ribs and adjacent to each other. The line connecting the outer end of the second guide rib and the center of the first end cover is a first reference line.

[0006] Along the circumference of the first end cover, the inner end of the first guide rib and the inner end of the second guide rib are located on both sides of the first reference line.

[0007] Further, the tangent line of the inner end of the second guide rib is parallel to the first reference line.

[0008] Further optionally, 4mm≤h1≤8mm is satisfied, wherein h1 is the distance between the tangent line of the inner end of the second guide rib and the first reference line.

[0009] Further optionally, the first end cover comprises a first preset circle and a second preset circle arranged in sequence from outside to inside along the radial direction of the first end cover, and the first preset circle, the second preset circle and the first end cover are concentric.

[0010] Each of the guide ribs is located between the first preset circle and the second preset circle, and 100mm≤D1≤110mm and 75mm≤D2≤85mm are satisfied, wherein D1 is the diameter of the first preset circle, and D2 is the diameter of the second preset circle.

[0011] Further optionally, the first end cover further comprises a third preset circle, the third preset circle is located between the first preset circle and the second preset circle and is concentric with the first end cover, the rotation directions of each of the guide ribs are the same, and the spiral centers of each of the guide ribs are located on the third preset circle.

[0012] Further optionally, the first end cover is formed with a plurality of flow-through grooves, and the plurality of flow-through grooves are arranged along the circumferential direction of the first end cover; each of the flow-through grooves is in an arc structure and is concentric with the first end cover.

[0013] Further optionally, each of the flow-through grooves comprises an outer arc-shaped edge and an inner arc-shaped edge arranged in sequence from outside to inside along the radial direction of the first end cover, the radial distance between the outer arc-shaped edge and the inner arc-shaped edge is the same, and 3mm≤b1≤6mm is satisfied, wherein b1 is the radial distance between the outer arc-shaped edge and the inner arc-shaped edge.

[0014] Further optionally, a boss is formed on the end face of the first end cover away from the blade segment, an outer edge of the boss is provided with a step, each of the flow-through grooves is located between the guide rib and the boss, and b2>b3 is satisfied, wherein b2 is the radial distance between the outer arc-shaped edge and the second preset circle, and b3 is the radial distance between the inner arc-shaped edge and the outer edge of the boss.

[0015] Further optionally, each of the flow-through grooves is formed with a first circular arc and a second circular arc at two ends along the circumferential direction of the first end cover; the connecting line between the center of the first circular arc and the center of the first end cover is a second reference line, the connecting line between the center of the second circular arc and the center of the first end cover is a third reference line, and 25°≤α≤35° is satisfied, wherein α is the included angle between the second reference line and the third reference line.

[0016] Further optionally, the first end cover further comprises a fourth preset circle, the fourth preset circle is located on the inner side of the second preset circle and the fourth preset circle is concentric with the first end cover; the center of each flow channel is located on the fourth preset circle, and 60mm≤D4≤70mm is met, wherein D4 is the diameter of the fourth preset circle.

[0017] The application further provides an air conditioner comprising an indoor unit, wherein the indoor unit comprises a bottom shell and the cross-flow fan blade assembly described in any one of the preceding aspects; the cross-flow fan blade assembly is arranged on a volute of the bottom shell, and further comprises a driving motor connected with the cross-flow fan blade drivingly; the first end cover is arranged close to the driving motor, and the second end cover is arranged away from the driving motor.

[0018] Compared with the prior art, the application has the following beneficial effects:

[0019] (1) The structure of the side of the first end cover away from the blade segment is optimized, a plurality of guide ribs are arranged on the end face of the first end cover away from the blade segment in the circumferential direction, and each guide rib is a spiral arc structure, so that the extension direction of the guide rib is consistent with the air outlet direction of the cross-flow fan blade, the air outlet resistance is reduced, the air pressure is increased, the air flow is smooth and fast, the air flow is continuous and stable, the temperature difference between the two end faces of the first end cover is reduced, and condensation water is avoided; the problem that the temperature difference between the two end faces of the first end cover is large due to the unsmooth air flow on the side of the first end cover away from the blade segment is effectively solved.

[0020] (2) The first end cover forms a plurality of flow channels, the flow channels are arc structures, and the air flow between the two end faces of the first end cover is realized; in combination with the guide ribs, the temperature difference between the two end faces of the first end cover is minimized, so that the end face of the first end cover away from the blade segment reaches the dew point temperature, and condensation water is less formed or not formed, so that the air conditioner finally meets the condensation standard requirement, the safety hidden danger is avoided, and the user experience is improved.

[0021] (3) The sponge heat preservation or the flocking is pasted on the end face of the first end cover away from the blade segment, which has a good heat insulation effect, prolongs the heat transfer path between the air outlet of the cross-flow fan blade and the end face of the first end cover, and effectively solves the problem that condensation is easily generated on the end face of the first end cover. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be derived from the provided drawings without creative labor.

[0023] The structures, proportions, sizes, etc. shown in the specification are only used to cooperate with the content disclosed in the specification, to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the application, so they do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose of the application, should still fall within the scope of the disclosed technology.

[0024] Figure 1 Structure schematic diagram of the cross-flow fan blade assembly embodiment 1 provided by the application;

[0025] Figure 2a Axial side structure schematic diagram of the first end cover embodiment 1 provided by the application;

[0026] Figure 2b Axial side structure schematic diagram of the second end cover embodiment 1 provided by the application;

[0027] Figure 3a 、 Figure 3b and Figure 3c Front view structure schematic diagram of the first end cover embodiment 1 provided by the application;

[0028] Figure 3d Left view structure schematic diagram of the first end cover embodiment 1 provided by the application;

[0029] Figure 4 Structure schematic diagram of the first end cover embodiment 2 provided by the application;

[0030] In the figure:

[0031] 1-cross-flow fan blade; 11-first end cover; 111-flow-through groove; 1111-outer arc-shaped edge; 1112-inner arc-shaped edge; 1113-first circular arc; 1114-second circular arc; 112- boss; 12-second end cover; 13-blade segment;

[0032] 2-guide rib; 21-first guide rib; 22-second guide rib; 23-outer end; 24-inner end; 3-step;

[0033] 41-first preset circle; 42-second preset circle; 43-third preset circle; 44-fourth preset circle;

[0034] 51-first reference line; 52-second reference line; 53-third reference line. DETAILED DESCRIPTION

[0035] The following detailed description of the application is provided as an enabling teaching of the application and will be best understood in conjunction with the accompanying drawings. Those skilled in the art will recognize that many embodiments of the application can be made without departing from the scope of the application. Therefore, the following detailed description is not intended to limit the scope of the application as claimed.

[0036] The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the description of the application and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be understood that the terms "and / or", "at least one of", and "one or more of" as used herein, and "comprising", "comprised of", "comprising" or "comprise", "containing", "containing" or "contain" when used in the context of describing composition of a mixture are intended to mean that at least one of and optionally some or all of the recited components are present in the mixture. It will be further understood that terms, such as "including", "including", "comprising", "comprising", "containing" or "containing", when used in the context of describing composition, are used open- ended, and are intended to mean that at least the recited component is present in the composition, and is not intended to mean that any other component can or cannot be present in the composition, unless otherwise specified.

[0037] It should be understood that the term "and / or" as used herein is merely an associative relationship of the associated objects, and means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B exist at the same time, and B alone. In addition, the character " / " herein generally represents that the front and rear associated objects are a "or" relationship.

[0038] It should also be noted that the terms "including", "including", or any other variant thereof are intended to cover non-exclusive inclusion, so that the goods or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such goods or system. Without more limitation, the element defined by the sentence "including a" does not exclude the presence of other identical elements in the goods or system including the element.

[0039] The existing cross-flow fan blade is arranged on the bottom shell of the heat exchange device, and a gap is formed between the motor and the bottom shell. The first end cover itself has a certain thickness. When the cross-flow fan blade operates, the two end surfaces of the first end cover are not easy to reach the same temperature or a small temperature difference. Therefore, the end surface of the first end cover close to the motor side is easy to reach the condensation point and produce condensation water. The condensation water enters the air duct through the gap between the motor and the bottom shell, which is easy to cause safety hazards. The condensation water enters the indoor through the air duct, which reduces the user experience.

[0040] The application creatively provides a cross-flow fan blade assembly, which comprises a cross-flow fan blade and guide ribs. The cross-flow fan blade comprises a first end cover, a second end cover and a blade segment arranged between the first end cover and the second end cover. The guide ribs are in a spiral arc structure and comprise a plurality of guide ribs. The plurality of guide ribs are arranged on the end surface of the first end cover away from the blade segment in a circumferential direction.

[0041] The structure is simple, the extension direction of the guide ribs is consistent with the air outlet direction of the cross-flow fan blade, air flow is smooth and fast, the temperature difference between the two end surfaces of the first end cover is reduced, and condensation water is avoided.

[0042] Embodiment 1

[0043] <Guide rib>

[0044] As shown in Figure 1 , Figure 2a and Figure 2b , the embodiment provides a cross-flow fan blade assembly, which comprises a cross-flow fan blade 1 and guide ribs 2. The cross-flow fan blade 1 comprises a first end cover 11, a second end cover 12 and a blade segment 13 arranged between the first end cover 11 and the second end cover 12. Specifically, the first end cover 11, the second end cover 12 and the blade segment 13 are ultrasonically welded together. The guide ribs 2 comprise a plurality of guide ribs 2 arranged along the circumference of the first end cover 11 and arranged on the end surface of the first end cover 11 away from the blade segment 13. Each guide rib 2 is a spiral arc structure and extends along the end surface of the first end cover 11. Specifically, each guide rib 2 extends from the outer edge of the first end cover 11 towards the center of the first end cover 11. The number of guide ribs 2 is less than or equal to the number of blades in the blade segment 13, and preferably, the number of guide ribs 2 is equal to the number of blades in the blade segment 13.

[0045] In summary, the structure of the side of the first end cover 11 away from the blade segment 13 is optimized, each guide rib 2 is a spiral arc structure, the extension direction of the guide rib 2 is consistent with the air outlet direction of the cross-flow fan blade 1, the air flow resistance is reduced, the air pressure is increased, the air flow is smooth and fast, the air flow is continuous and stable, the temperature difference between the two end surfaces of the first end cover 11 is reduced, and condensation water is avoided. The problem of large temperature difference between the two end surfaces of the first end cover 11 caused by the unsmooth air flow on the side of the first end cover 11 away from the blade segment 13 is effectively solved.

[0046] In view of the problem of large air flow resistance and unsmooth air flow caused by unreasonable structure design of the guide rib 2, the embodiment provides that each guide rib 2 comprises an outer end 23 and an inner end 24, the outer end 23 is close to the outer edge of the first end cover 11, and the inner end 24 is close to the center of the first end cover 11. The plurality of guide ribs 2 comprises a first guide rib 21 and a second guide rib 22, the first guide rib 21 and the second guide rib 22 are adjacent and arranged in sequence along the direction of rotation of the guide rib 2. The direction of rotation of the guide rib 2 includes left rotation and right rotation, which can be determined according to the direction of rotation of the cross-flow fan blade 1. In the embodiment, as shown in Figure 3a , the direction of rotation of the guide rib 2 is right rotation, the first guide rib 21 is in front and the second guide rib 22 is in back along the direction of rotation of the guide rib 2. The line connecting the outer end 23 of the second guide rib 21 and the center of the first end cover 11 is a first reference line 51.

[0047] Along the circumference of the first end cover 11, the inner side end 24 of the first guide rib 21 and the inner side end 24 of the second guide rib 22 are located on both sides of the first reference line 51.

[0048] As shown in Figure 3a , Figure 3b , Figure 3c and Figure 3d , the tangent line of the inner side end 24 of the second guide rib 22 is parallel to the first reference line 51; the distance between the tangent line of the inner side end 24 of the second guide rib 22 and the first reference line 51 is h1, 4mm≤h1≤8mm, preferably h1=6.5mm; to ensure the balance of wind pressure under the condition of air flow and avoid abnormal noise.

[0049] In addition, the first end cover 11 comprises a first preset circle 41 and a second preset circle 42, which are sequentially arranged from outside to inside along the radial direction of the first end cover 11, and the first preset circle 41, the second preset circle 42 and the first end cover 11 are concentric;

[0050] Each guide rib 2 is located between the first preset circle 41 and the second preset circle 42, and satisfies 100mm≤D1≤110mm, 75mm≤D2≤85mm, wherein D1 is the diameter of the first preset circle 41, and D2 is the diameter of the second preset circle 42;

[0051] Preferably, each guide rib 2 has the same structure, the thickness of the guide rib 2 is h2=1mm, the thickness direction of the guide rib 2 is the same as the axial direction of the cross-flow fan blade 1; D1=104mm, D2=80.5mm;

[0052] The structure of the guide rib 2 is optimized, the air flow resistance is reduced, the air flow is smooth, the temperature difference between the two end faces of the first end cover 11 is reduced, the condensation water is avoided, and the reliable operation of the cross-flow fan blade 1 is ensured.

[0053] In view of the problem that the unreasonable structure design of the guide rib 2 leads to uneven and continuous air flow, the embodiment further comprises a third preset circle 43, which is located between the first preset circle 41 and the second preset circle 42 and concentric with the first end cover 11; each guide rib 2 has the same rotation direction and the spiral center of each guide rib 2 is located on the third preset circle 43;

[0054] In addition, the third preset circle 43 increases with the increase of the outer diameter of the cross-flow fan blade 1 and decreases with the decrease of the outer diameter of the cross-flow fan blade 1, and satisfies 60mm≤D0≤130mm, wherein D0 is the outer diameter of the cross-flow fan blade 1; in order to ensure the change of the eccentric nest which will cause noise;

[0055] In summary, the guide ribs 2 are uniformly distributed, balance the pressure of the two end faces of the first end cover 11, make the density and speed of the air uniformly distributed, make the air flow uniform and continuous, reduce the temperature difference between the two end faces of the first end cover 11, avoid the generation of condensation water, and ensure the reliable operation of the cross-flow fan blade 1.

[0056] <flow-through groove>

[0057] As shown in Figure 3a , Figure 3b , Figure 3c and Figure 3d , in view of the problem that the temperature difference is large due to the non-flow-through of the two end faces of the first end cover 11, the embodiment proposes that the first end cover 11 is formed with a plurality of flow-through grooves 111, and the plurality of flow-through grooves 111 are arranged along the circumference of the first end cover 11; each flow-through groove 111 is an arc structure and each flow-through groove 111 is concentric with the first end cover 11.

[0058] In summary, the flow of the air on the two end faces of the first end cover 11 is realized; in combination with the guide ribs 2, the temperature difference between the two end faces of the first end cover 11 is minimized, so as to reduce or eliminate the dew point temperature of the end face of the first end cover 11 away from the blade segment 13, and to reduce or eliminate the formation of condensation water, so as to finally make the air conditioner meet the condensation standard requirement, avoid causing safety hazards, and improve the user experience.

[0059] Further, each flow-through groove 111 includes an outer arc-shaped edge 1111 and an inner arc-shaped edge 1112, which are sequentially arranged from outside to inside along the radial direction of the first end cover 11; the radial distance between the outer arc-shaped edge 1111 and the inner arc-shaped edge 1112 is the same and satisfies 3mm≤b1≤6mm, where b1 is the radial distance between the outer arc-shaped edge 1111 and the inner arc-shaped edge 1112; preferably, b1=3mm, to ensure the ultrasonic welding strength of the first end cover 11 and the guide ribs.

[0060] Further optionally, a boss 112 is formed on the end face of the first end cover 11 away from the blade segment 13, and the inner edge of the boss 112 is provided with the step 3; each flow-through groove 111 is located between the guide rib 2 and the boss 112, and satisfies b2>b3, where b2 is the radial distance between the outer arc-shaped edge 1111 and the second predetermined circle 42, and b3 is the radial distance between the inner arc-shaped edge 1112 and the outer edge of the boss 112.

[0061] Since the first end cover 11 is formed by injection molding nesting of the step 3, the periphery of the step 3 is a circular iron sheet, and the periphery is rubber-coated to ensure the reliability of injection molding; the flow-through groove 111 is open, and cannot be too close to the step 3, otherwise it will affect the reliability of the injection molding connection; b3 is the core problem, and b2 is to ensure that the air flow field of the end face of the first end cover 11 can be uniform, and the temperature can be quickly reduced within the circular range of b2, to avoid the generation of fine condensation.

[0062] To solve the problem of the unreasonable structure of the flow-through grooves 111 leading to less air flow between the two end faces of the first end cover 11, the embodiment is provided with a first circular arc 1113 and a second circular arc 1114 at the two ends of each flow-through groove 111 along the circumference of the first end cover 11; the line connecting the center of the first circular arc 1113 with the center of the first end cover 11 is the second reference line 52, the line connecting the center of the second circular arc 1114 with the center of the first end cover 11 is the third reference line 53, and 25°≤α≤35° is met, where α is the included angle between the second reference line 52 and the third reference line 53.

[0063] In the axial direction of the first end cover 11, each flow-through groove 111 is chamfered, and the chamfer size c is not less than one third of the thickness of the first end cover 11; preferably, c=1mm.

[0064] Further, the first end cover 11 further includes a fourth preset circle 44, which is located inside the second preset circle 42 and is concentric with the first end cover 11; the center of each flow-through groove 111 is located on the fourth preset circle 44, and 60mm≤D4≤70mm is met, where D4 is the diameter of the fourth preset circle 44.

[0065] Preferably, each flow-through groove 111 has the same structure, and the plurality of flow-through grooves 111 are uniformly distributed along the axial direction of the first end cover 11, and D4=66mm.

[0066] The structure of the flow-through grooves 111 is optimized, the ventilation area is increased, the ventilation volume is ensured, the two end faces of the first end cover 11 are evenly heated, the temperature difference between the two end faces of the first end cover 11 is reduced, condensation is avoided, and the reliable operation of the cross-flow fan blade 1 is ensured.

[0067] It should be noted that the number of fluid grooves is not limited and can be set according to actual needs. In the embodiment, six flow-through grooves 111 are included.

[0068] <Air conditioner>

[0069] For a split air conditioner, the corresponding dew point temperature is obtained according to the corresponding dry bulb temperature and wet bulb temperature at the indoor side and the outdoor side; the dew point temperature represents the critical point temperature at which condensation occurs, and the condensation reliability test is a requirement that must be met for air conditioner development, which provides that the working condition is inner ring 27 / 24, outer ring 27 / 24, and humidity 78%; under this condition, the dew point temperature is 22.97℃.

[0070] During the test, the air flow speed of the first end cover 11 of the cross-flow fan blade 1 near the side of the blade node 13 is fast, which is the cold air side; the air flow speed of the first end cover 11 of the cross-flow fan blade 1 away from the side of the blade node 13 is slow, which is the warm air side; the air forms a warm air nest at the volute of the bottom shell; during the test in the high-humidity environment (such as the above working condition) for 4 hours, the cross-flow fan blade 1 itself has a certain thickness, and the two end faces of the first end cover 11 are not easy to reach the same temperature or a very small temperature difference, so that the side of the first end cover 11 away from the blade node 13 is most likely to reach the dew point temperature to generate condensate water, that is, to form condensate water on the warm air side; after a period of operation, the condensate water is thrown to the volute of the bottom shell to gather and flow out or be blown out;

[0071] To solve the above problems, the embodiment further provides an air conditioner, which comprises an indoor unit, and the indoor unit comprises a bottom shell and the cross-flow fan blade assembly in any of the above embodiments; the cross-flow fan blade assembly is arranged on the volute of the bottom shell, and the cross-flow fan blade assembly further comprises a driving motor in driving connection with the cross-flow fan blade 1, the first end cover 11 is arranged close to the driving motor, and the second end cover 12 is arranged away from the driving motor;

[0072] The application optimizes the air flow paths of the two end faces of the first end cover 11 by innovatively designing the structure of the first end cover 11, changes the temperature difference between the two end faces of the first end cover 11 of the cross-flow fan blade 1, avoids the formation of condensate water on the first end cover 11, fundamentally reduces the temperature difference between the two end faces of the first end cover 11, fundamentally solves the problem that the condensate water is easily formed on the first end cover 11, can be used for subsequent energy efficiency upgrading, wide use of DC motors to improve product reliability and product competitiveness, and reduce product noise; from the development investment aspect, the development cycle is saved, and the application can be widely used; on the one hand, the first end cover 11 can accelerate the air flow on the warm air side under the high-speed operation of the cross-flow fan blade 1 after the first end cover 11 is provided with the guide ribs 2, and plays a role in reducing the temperature difference between the warm air side and the cold air side of the first end cover 11; on the other hand, the first end cover 11 is provided with the flow-through groove 111, so that the air on the cold air side can flow to the warm air side through the flow-through groove 111, the temperature difference is quickly reduced, the surface temperature of the first end cover 11 does not reach the dew point temperature, and finally the condensate water is not easily or not formed.

[0073] Embodiment 2

[0074] Sponge or flocking is pasted on the end face of the first end cover 11 away from the blade node 13, which plays a good heat insulation role and prolongs the heat transfer path between the air outlet of the cross-flow fan blade 1 and the end face of the first end cover 11, thereby effectively solving the problem that the condensate water is easily formed on the end face of the first end cover 11; or,

[0075] The volute structure of the bottom shell is redesigned, and the DC motor and the AC motor are not used in the same shell; or, the sponge or the like is used to block the area between the first end cover 11 and the volute of the bottom shell.

[0076] Embodiment 3

[0077] As Figure 4 shown, unlike Example 1, the flow passage 111 is a hole type structure.

[0078] The exemplary embodiments of the present disclosure are specifically shown and described above. It should be understood that the present disclosure is not limited to the detailed structure, arrangement or implementation method described herein; rather, the present disclosure is intended to encompass various modifications and equivalent arrangements within the spirit and scope of the appended claims.

Claims

1. A cross-flow fan blade assembly, characterized in that, The cross-flow fan blade assembly comprises a cross-flow fan blade (1) and guide ribs (2). The cross-flow fan blade (1) comprises a first end cover (11), a second end cover (12) and a blade segment (13) arranged between the first end cover (11) and the second end cover (12). The guide ribs (2) are arranged on the end surface of the first end cover (11) away from the blade segment (13) along the circumference of the first end cover (11). Each guide rib (2) is a spiral arc structure extending along the end surface of the first end cover (11). The extension direction of the guide rib (2) is consistent with the air outlet direction of the cross-flow fan blade (1). Each guide rib (2) comprises an outer side end (23) close to the outer edge of the first end cover (11) and an inner side end (24) close to the center of the first end cover (11). The guide ribs (2) comprise a first guide rib (21) and a second guide rib (22) arranged in sequence and adjacent along the rotation direction of the guide rib (2). The line connecting the outer side end (23) of the second guide rib (22) and the center of the first end cover (11) is a first reference line (51). Along the circumference of the first end cover (11), the inner side end (24) of the first guide rib (21) and the inner side end (24) of the second guide rib (22) are located on both sides of the first reference line (51). The tangent line of the inner side end (24) of the second guide rib (22) is parallel to the first reference line (51). The first end cover (11) is formed with a plurality of flow-through grooves (111) arranged along the circumference of the first end cover (11). Each flow-through groove (111) is an arc structure and is concentric with the first end cover (11). Each flow-through groove (111) is formed with a first circular arc (1113) and a second circular arc (1114) at both ends along the circumference of the first end cover (11). The line connecting the center of the first circular arc (1113) and the center of the first end cover (11) is a second reference line (52). The line connecting the center of the second circular arc (1114) and the center of the first end cover (11) is a third reference line (53). The included angle α between the second reference line (52) and the third reference line (53) satisfies 25°≤α≤35°.

2. The cross-flow impeller assembly of claim 1, wherein, 4mm≤h1≤8mm, where h1 is the distance between the tangent line of the inner side end (24) of the second guide rib (22) and the first reference line (51). 3.The cross-flow impeller assembly of claim 1, wherein, The first end cover (11) comprises a first preset circle (41) and a second preset circle (42) arranged in sequence from outside to inside along the radial direction of the first end cover (11). The first preset circle (41), the second preset circle (42) and the first end cover (11) are concentric. Each guide rib (2) is located between the first preset circle (41) and the second preset circle (42), and satisfies 100mm≤D1≤110mm, 75mm≤D2≤85mm, where D1 is the diameter of the first preset circle (41) and D2 is the diameter of the second preset circle (42).

4. The cross-flow impeller assembly of claim 3, wherein, The first end cover (11) further comprises a third preset circle (43) located between the first preset circle (41) and the second preset circle (42) and concentric with the first end cover (11); each of the guide ribs (2) has the same rotation direction and the helical center of each of the guide ribs (2) is located on the third preset circle (43). 5.The cross-flow impeller assembly of claim 3, wherein, Each of the flow-through grooves (111) comprises an outer arc-shaped edge (1111) and an inner arc-shaped edge (1112) sequentially arranged from outside to inside along the radial direction of the first end cover (11), the radial distance between the outer arc-shaped edge (1111) and the inner arc-shaped edge (1112) is the same, and satisfies 3mm≤b1≤6mm, wherein b1 is the radial distance between the outer arc-shaped edge (1111) and the inner arc-shaped edge (1112). 6.The cross-flow impeller assembly of claim 5, wherein, The first end cover (11) is formed with a boss (112) on the end face away from the blade (13), the inner edge of the boss (112) is provided with a step (3); each of the flow-through grooves (111) is located between the guide rib (2) and the boss (112), and satisfies b2>b3, wherein b2 is the radial distance between the outer arc-shaped edge (1111) and the second preset circle (42), and b3 is the radial distance between the inner arc-shaped edge (1112) and the outer edge of the boss (112). 7.The cross-flow impeller assembly of claim 3, wherein, The first end cover (11) further comprises a fourth preset circle (44) located on the inner side of the second preset circle (42) and concentric with the first end cover (11); the center of each of the flow-through grooves (111) is located on the fourth preset circle (44), and satisfies 60mm≤D4≤70mm, wherein D4 is the diameter of the fourth preset circle (44).

8. An air conditioner characterized by comprising: The indoor unit comprises a bottom shell and the cross-flow fan blade assembly according to any one of claims 1-7; the cross-flow fan blade assembly is arranged on the volute of the bottom shell, and further comprises a driving motor in driving connection with the cross-flow fan blade (1), the first end cover (11) is arranged close to the driving motor, and the second end cover (12) is arranged away from the driving motor.

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