Cross-flow fan blade and air conditioner

Abstract

The application provides a cross-flow fan blade and an air conditioner, and relates to the technical field of air conditioners. The cross-flow fan blade comprises a plurality of fan blade assemblies; each fan blade assembly comprises a fixed fan disc and a plurality of blades, the plurality of blades are arranged at intervals on the fixed fan disc, the plurality of blades are hollow structures, a plurality of transition grooves are arranged on the fixed fan disc, and the plurality of transition grooves are in one-to-one correspondence with the internal cavities of the plurality of blades; the blades of the plurality of fan blade assemblies can be sequentially accommodated in the blades of the adjacent fan blade assemblies to make the cross-flow fan blade in a contracted state. The plurality of fan blade assemblies can be sequentially accommodated in the blades of the adjacent fan blade assemblies in the same direction, so that the plurality of fan blade assemblies of the cross-flow fan blade can be stacked. The length of the entire cross-flow fan blade is reduced, the occupied volume of the cross-flow fan blade in the transportation process is reduced, and the probability of breakage of the cross-flow fan blade in the transportation process is reduced due to the fact that the cross-flow fan blade is in the contracted state.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and more specifically, to a cross-flow fan blade and an air conditioner. Background Technology

[0002] Cross-flow fan blades have a simple structure and a large air volume, and are widely used in the indoor unit ducts of air conditioners. However, due to their relatively long length and hollow internal structure, cross-flow fan blades are prone to breakage during transportation, causing damage. Furthermore, because cross-flow fan blades are relatively large, they require large vehicles for transport, resulting in heavy-duty vehicles carrying light goods and increasing transportation costs. Summary of the Invention

[0003] The problem addressed by this invention is how to reduce damage to cross-flow fan blades and transportation costs.

[0004] To address the above problems, the present invention provides a cross-flow fan blade and an air conditioner.

[0005] In a first aspect, embodiments of the present invention provide a cross-flow fan blade, the cross-flow fan blade comprising: a plurality of fan blade assemblies;

[0006] Each of the fan blade assemblies includes a fixed fan disc and multiple blades. The multiple blades are spaced apart on the fixed fan disc. All of the multiple blades are hollow structures. The fixed fan disc is provided with multiple transition grooves, and the multiple transition grooves are connected to the internal cavities of the multiple blades one by one.

[0007] The blades of the wind turbine assembly can pass through the transition slot of the adjacent wind turbine assembly and be housed in the internal cavity of the corresponding blade.

[0008] Multiple wind turbine assemblies can move in the same direction, so that the blades of the multiple wind turbine assemblies can be sequentially housed in the blades of the adjacent wind turbine assemblies, so that the cross-flow wind turbine is in a retracted state.

[0009] In this embodiment of the invention, multiple blade assemblies can be sequentially housed in the blades of adjacent blade assemblies in the same direction, allowing the multiple blade assemblies of the cross-flow fan to be stacked. This reduces the overall length of the cross-flow fan, reduces the volume occupied by the cross-flow fan during transportation, and, since the cross-flow fan is in a retracted state, reduces the probability of breakage during transportation.

[0010] In an optional embodiment of the present invention, the wind turbine assembly further includes a rotating fan disc disposed on the side of the fixed fan disc away from the blade, the rotating fan disc being provided with a connecting groove, and the blades of the adjacent wind turbine assembly cooperating with the connecting groove.

[0011] In an optional embodiment of the present invention, a first limiting part is provided on the side of the rotating fan disk close to the fixed fan disk, and a second limiting part is provided on the side of the fixed fan disk away from the blade; when the cross-flow fan blade is deployed, the first limiting part and the second limiting part cooperate.

[0012] In an optional embodiment of the present invention, the second limiting part is a limiting groove provided on the fixed fan plate, the first limiting part protrudes on the rotating fan plate, and the second limiting part cooperates with the limiting groove.

[0013] In an optional embodiment of the present invention, the first limiting part includes a first limiting segment and a second limiting segment connected to each other. The end of the second limiting segment away from the first limiting segment is connected to the rotating fan. The second limiting part includes a first groove segment and a second groove segment connected to each other. The first groove segment is disposed close to the blade. The width of the first groove segment is greater than the width of the second groove segment. The first groove segment cooperates with the first limiting segment, and the second groove segment cooperates with the second limiting segment.

[0014] In an optional embodiment of the present invention, the first limiting segment has an inclined guide surface. Under the condition that the guide surface is disengaged from the second groove segment, the first groove segment cooperates with the first limiting segment, and the second groove segment cooperates with the second limiting segment.

[0015] In an optional embodiment of the present invention, a first fixing part is provided in the connecting groove, and a second fixing part is provided at the end of the blade away from the fixed fan disk; when the cross-flow fan blade is deployed, the second fixing part cooperates with the first fixing part of the rotating fan disk of the adjacent fan blade assembly.

[0016] In an optional embodiment of the present invention, the second fixing part is a fixing groove provided on the blade, the fixing groove communicating with the internal cavity of the blade, and the first fixing part protruding on the side wall of the connecting groove.

[0017] In an optional embodiment of the present invention, the first fixing part has a supporting surface on the side near the fixed fan plate, and the inner wall of the fixing groove abuts against the supporting surface when the cross-flow fan blade is deployed.

[0018] In an optional embodiment of the present invention, under the condition that the cross-flow fan blades are deployed, the blades of the fan blade assembly are misaligned with the transition grooves of the adjacent fan blade assembly.

[0019] Secondly, embodiments of the present invention provide an air conditioner, the air conditioner including the cross-flow fan blades provided in the first aspect.

[0020] The beneficial effects of the air conditioner provided in the second aspect are the same as those of the cross-flow fan blades provided in the first aspect, and will not be repeated here. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the cross-flow fan blade in its deployed state, as provided in the first embodiment of the present invention.

[0022] Figure 2 An exploded view of a cross-flow fan blade provided for the first embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the cross-flow fan blade in the retracted state, provided for the first embodiment of the present invention.

[0024] Figure 4 A first-view structural schematic diagram of the blade assembly of a cross-flow fan blade provided in the first embodiment of the present invention.

[0025] Figure 5 The cross-flow fan blade provided in the first embodiment of the present invention is Figure 4 A cross-sectional view of plane AA.

[0026] Figure 6 A schematic diagram of the rotating fan disc of the fan blade assembly of the cross-flow fan blade provided in the first embodiment of the present invention.

[0027] Figure 7 The cross-flow fan blade provided in the first embodiment of the present invention is Figure 6 A cross-sectional view of the BB plane.

[0028] Figure 8 A cross-sectional view showing the cooperation between the first limiting part and the second limiting part of the cross-flow fan blade provided in the first embodiment of the present invention.

[0029] Figure 9 A second-view structural schematic diagram of the fan blade assembly of the cross-flow fan blade provided in the first embodiment of the present invention.

[0030] Figure 10 A cross-sectional view showing the cooperation between the first fixing part and the second fixing part of the cross-flow fan blade provided in the first embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 100-Cross-flow fan blade; 110-Fan blade assembly; 112-Fixed fan disc; 1121-Transition groove; 1123-Second limiting part; 1124-First groove section; 1125-Second groove section; 114-Blade; 1141-Second fixing part; 116-Rotating fan disc; 1161-Connecting groove; 1164-First limiting section; 1165-Second limiting section; 1166-Guide surface; 1167-First fixing part; 1168-First fixing section; 1169-Second fixing section; 120-End cover; 130-End fan disc. Detailed Implementation

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] First Embodiment

[0035] Please see Figure 1 , Figure 2 and Figure 3 This embodiment provides a cross-flow fan blade 100. The cross-flow fan blade 100 provided in this embodiment can be in a retracted state during transportation, reducing the volume occupied by the cross-flow fan blade 100 during transportation. At the same time, since the cross-flow fan blade 100 is in a retracted state, the probability of the cross-flow fan blade 100 breaking during transportation is reduced.

[0036] The cross-flow fan blade 100 has a simple structure and a large air volume, and is widely used in the indoor unit duct of air conditioners. However, due to its long length and hollow internal structure, the cross-flow fan blade 100 is prone to breakage during transportation, causing damage. Furthermore, its large size necessitates the use of large vehicles for transport, resulting in heavy-duty vehicles carrying light goods and increasing transportation costs. The cross-flow fan blade 100 provided in this embodiment improves upon these problems. During transportation, the cross-flow fan blade 100 can be in a retracted state, reducing its volume footprint and lowering the probability of breakage.

[0037] In this embodiment, the cross-flow fan 100 includes: multiple fan blade assemblies 110; each fan blade assembly 110 includes a fixed fan disk 112 and multiple blades 114, the multiple blades 114 are spaced apart on the fixed fan disk 112, the multiple blades 114 are all hollow structures, the fixed fan disk 112 is provided with multiple transition grooves 1121, the multiple transition grooves 1121 are correspondingly connected to the internal cavities of the multiple blades 114; the blades 114 of the fan blade assembly 110 can pass through the transition grooves 1121 of the adjacent fan blade assembly 110 and be accommodated in the internal cavity of the corresponding blade 114; the multiple fan blade assemblies 110 can move in the same direction, so that the blades 114 of the multiple fan blade assemblies 110 can be sequentially accommodated in the blades 114 of the adjacent fan blade assembly 110, so that the cross-flow fan 100 is in a retracted state.

[0038] In this embodiment, multiple blade assemblies 110 can be sequentially housed in the blades 114 of adjacent blade assemblies 110 in the same direction, allowing the multiple blade assemblies 110 of the cross-flow fan 100 to be stacked. This reduces the overall length of the cross-flow fan 100, reduces the volume occupied by the cross-flow fan 100 during transportation, and, since the cross-flow fan 100 is in a retracted state, reduces the probability of the cross-flow fan 100 breaking during transportation.

[0039] In this process, the blades 114 of multiple fan blade assemblies 110 are sequentially housed in the blades 114 of their respective fan blade assemblies 110. When the cross-flow fan blade 100 is in a retracted state, the length of the entire cross-flow fan blade 100 is approximately the length of only one fan blade assembly 110, which greatly reduces the length of the cross-flow fan blade 100 and thus reduces the volume occupied during transportation.

[0040] In this embodiment, when the cross-flow fan blade 100 is in the unfolded state, multiple fan blade assemblies 110 are arranged sequentially, so that the entire cross-flow fan blade 100 is elongated. In the extension direction of the cross-flow fan blade 100, the direction from the fixed fan disk 112 toward the blade 114 is defined as the first direction, and the direction from the blade 114 toward the fixed fan disk 112 is defined as the second direction. In other words, both the first direction and the second direction are in the extension direction of the cross-flow fan blade 100, and the first direction is opposite to the second direction.

[0041] In this embodiment, in two adjacent fan blade assemblies 110, the blade 114 of one fan blade assembly 110 slides relative to the blade 114 of the adjacent fan blade assembly 110 in a first direction, extending from the corresponding transition groove 1121 into the blade 114 of that fan blade assembly 110. Multiple fan blade assemblies 110 slide in the manner described above, thereby placing the entire cross-flow fan blade 100 in a retracted state.

[0042] To clearly describe the motion states among the multiple blade assemblies 110, a cross-flow fan 100 comprising three blade assemblies 110 is used as an example. Taking the middle blade assembly 110 as the current blade assembly 110, the blade assembly 110 in the second direction of this blade assembly 110 is defined as the previous blade assembly 110, and the blade assembly 110 in the first direction is defined as the next blade assembly 110. When the entire cross-flow fan 100 is in a retracted state, the blades 114 of the previous blade assembly 110 pass through the transition groove 1121 of the current blade assembly 110 and are accommodated within the blades 114 of the current blade assembly 110. The blades 114 of the current blade assembly 110 pass through the transition groove 1121 of the next blade assembly 110 and are accommodated within the blades 114 of the next blade assembly 110. That is, the blades 114 of the multiple blade assemblies 110 are sequentially accommodated within the blades 114 of the adjacent blade assembly 110 in the first direction.

[0043] In this embodiment, the fan blade assembly 110 further includes a rotating fan disk 116, which is disposed on the side of the fixed fan disk 112 away from the blades 114. The rotating fan disk 116 is provided with a connecting groove 1161, and the blades 114 of the adjacent fan blade assembly 110 cooperate with the connecting groove 1161.

[0044] In this embodiment, the arrangement order of the same wind blade assembly 110 in the first direction is as follows: rotating wind disk 116, fixed wind disk 112, and blade 114. The blade 114 of the previous wind blade assembly 110 passes through the connecting groove 1161 and the transition groove 1121 on the rotating wind disk 116 of the current wind blade assembly 110 and is thus accommodated in the blade 114 of the current wind blade assembly 110.

[0045] In this embodiment, when the cross-flow fan blade 100 is deployed, the rotating fan disc 116 is mainly used to limit the blades 114 and the fixed fan disc 112, restricting the displacement of the fan blade assembly 110 in the first and second directions. When the cross-flow fan blade 100 is deployed, the multiple fan blade assemblies 110 can be relatively fixed, ensuring the stability of the cross-flow fan blade 100 during operation and ensuring the working effect of the cross-flow fan blade 100.

[0046] Please see Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 In this embodiment, a first limiting part is provided on the side of the rotating fan disk 116 close to the fixed fan disk 112, and a second limiting part 1123 is provided on the side of the fixed fan disk 112 away from the blade 114; when the cross-flow fan blade 100 is deployed, the first limiting part and the second limiting part 1123 cooperate.

[0047] In this embodiment, when the cross-flow fan blade 100 is deployed, the blades 114 of the multiple fan blade assemblies 110 slide relative to the blades 114 of the adjacent fan blade assembly 110 in the second direction. The multiple fan blade assemblies 110 are arranged in sequence. The first limiting part and the second limiting part 1123 cooperate with each other to limit the displacement of the fan blade assembly 110 in the second direction and fix the fan blade assembly 110 in the second direction.

[0048] In this embodiment, the second limiting part 1123 is a limiting groove provided on the fixed fan plate 112, the first limiting part protrudes on the rotating fan plate 116, and the second limiting part 1123 cooperates with the limiting groove.

[0049] During the sliding of multiple fan blade assemblies 110 in the second direction, due to the force and compression between the multiple fan blade assemblies 110, the first limiting part extends into the limiting groove, and the fan disk 116 is rotated to restrict the movement of the fixed fan disk 112 in the second direction, thereby achieving the fixation of the fan blades in the second direction.

[0050] It is easy to understand that in this embodiment, the second limiting part 1123 is a limiting groove and the first limiting part protrudes on the rotating fan plate 116. However, it is not limited to this. In other embodiments of the present invention, the first limiting part can also be a limiting groove and the second limiting part 1123 can protrude on the fixed fan plate 112, so that the first limiting part and the second limiting part 1123 can cooperate.

[0051] The first limiting part is circular, and the second limiting part 1123 is also circular. When the fan blade assembly 110 is deployed, the circular first limiting part and the circular second limiting part 1123 cooperate to increase the cooperation area between the first limiting part and the second limiting part 1123 and improve the fixing effect between the first limiting part and the second limiting part 1123.

[0052] In this embodiment, the first limiting part includes a first limiting segment 1164 and a second limiting segment 1165 connected to each other. The end of the second limiting segment 1165 away from the first limiting segment 1164 is connected to the rotating fan 116. The second limiting part 1123 includes a first groove segment 1124 and a second groove segment 1125 connected to each other. The first groove segment 1124 is disposed close to the blade 114. The width of the first groove segment 1124 is greater than the width of the second groove segment 1125. The first groove segment 1124 cooperates with the first limiting segment 1164, and the second groove segment 1125 cooperates with the second limiting segment 1165.

[0053] In this embodiment, both the first groove segment 1124 and the second groove segment 1125 have rectangular cross-sections. The width of the first groove segment 1124 is greater than the width of the second groove segment 1125. In the first direction, the first groove segment 1124 is located below the second groove segment 1125, that is, the second groove segment 1125 is located near the opening of the entire limiting groove. The second limiting segment 1165 has a rectangular cross-section, while the first limiting segment 1164 has a triangular cross-section. The length of the bottom surface connecting the first limiting segment 1164 and the second limiting segment 1165 is greater than the width of the second limiting segment 1165. The width of the first groove segment 1124 is greater than the width of the second groove segment 1125, so that after the first limiting segment 1164 extends into the first groove segment 1124, it can abut against the connection between the first groove segment 1124 and the second groove segment 1125, thereby limiting the displacement of the fan blade assembly 110 in the second direction.

[0054] In this embodiment, the first limiting segment 1164 has an inclined guide surface 1166. When the guide surface 1166 and the second groove segment 1125 are disengaged from each other, the first groove segment 1124 cooperates with the first limiting segment 1164, and the second groove segment 1125 cooperates with the second limiting segment 1165.

[0055] The first limiting segment 1164 has a triangular cross-section, with its base connected to the second limiting segment 1165. The guide surface 1166 comprises the two sides of the first limiting segment 1164. During the unfolding of the multiple fan blade assemblies 110, the guide surface 1166 abuts against the inner wall of the second groove segment 1125 and slides relative to it. When the guide surface 1166 disengages from the second groove segment 1125, the first limiting segment 1164 engages within the first groove segment 1124 and abuts against the connection between the first groove segment 1124 and the second groove segment 1125, thereby restricting the displacement of the fan blade assembly 110 in the second direction.

[0056] Please see Figure 6 , Figure 9 and Figure 10 In this embodiment, a first fixing part 1167 is provided in the connecting groove 1161, and a second fixing part 1141 is provided at the end of the blade 114 away from the fixed fan disk 112; when the cross-flow fan blade 100 is deployed, the second fixing part 1141 cooperates with the first fixing part 1167 of the rotating fan disk 116 of the adjacent fan blade assembly 110.

[0057] In other words, the second fixing part 1141 of the blade 114 of the current wind turbine assembly 110 cooperates with the first fixing part 1167 of the rotating wind disk 116 of the next wind turbine assembly 110, thereby limiting the displacement of the blade 114 in the first direction.

[0058] In this embodiment, the second fixing part 1141 is a fixing groove provided on the blade 114, and the fixing groove communicates with the internal cavity of the blade 114. The first fixing part 1167 protrudes from the side wall of the connecting groove 1161.

[0059] Similarly, in other embodiments of the present invention, the first fixing part 1167 may be a fixing groove provided inside the connecting groove 1161, and the second fixing part 1141 may be protruding on the blade 114, so that the first fixing part 1167 and the second fixing part 1141 can be matched.

[0060] In this embodiment, since the blade 114 has a hollow structure, the fixing groove communicates with the internal cavity of the blade 114. To improve the fixing effect between the first fixing part 1167 and the second fixing part 1141, two second fixing parts 1141 and two fixing grooves are provided. The two second fixing parts 1141 are provided on two opposite side walls of the connecting groove 1161, and the fixing grooves are provided on two opposite side surfaces of the blade 114. One second fixing part 1141 is inserted into one fixing groove, thereby restricting the displacement of the blade 114 in the first direction and the second direction.

[0061] The second fixing part 1141 is inserted into the fixing groove and extends into the internal cavity of the blade 114, restricting the movement of the blade 114 in the first direction and the second direction.

[0062] In this embodiment, the second fixing part 1141 includes a first fixing section 1168 and a second fixing section 1169 connected to each other. The first fixing section 1168 is connected to the connecting groove 1161. The width of the second fixing section 1169 is greater than the width of the first fixing section 1168. When the cross-flow fan blade 100 is deployed, the first fixing section 1168 is disposed in the fixing groove, and the second fixing section 1169 extends into the internal cavity of the blade 114 and abuts against the blade 114.

[0063] The second fixed section 1169 has a certain elasticity. During the unfolding of the cross-flow fan blade 100, the second fixed section 1169 contracts against the inner wall of the fixed groove. Under the condition that the second fixed section 1169 is separated from the fixed groove, the second fixed section 1169 abuts against the blade 114.

[0064] In this embodiment, when the cross-flow fan blade 100 is deployed, the blades 114 of the fan blade assembly 110 are misaligned with the transition grooves 1121 of the adjacent fan blade assembly 110.

[0065] In this embodiment, after the second fixing part 1141 is inserted into the fixing groove, the rotating fan disk 116 is rotated to drive the blades 114 of the previous fan blade assembly 110 and the fixing fan disk 112 to rotate, so that the fan blades of the previous fan blade assembly 110 and the fan blades of the current fan blade assembly 110 are not collinear, that is, the fan blades of the previous fan blade assembly 110 and the transition grooves 1121 of the current fan blade assembly 110 are misaligned, so as to avoid the blades 114 sliding from the transition grooves 1121 of the adjacent fan blade assembly 110 into the corresponding blades 114 when the cross-flow fan blade 100 is deployed, which would cause the cross-flow fan blade 100 to contract.

[0066] In this embodiment, the cross-flow fan blade 100 also includes an end cap 120, which is fixedly connected to the blade 114 of the lowermost fan blade assembly 110, thereby fixing the lower part of the entire cross-flow fan blade 100.

[0067] Furthermore, the cross-flow fan blade 100 also includes an end fan disk 130, which is connected to the rotating fan disk 116 of the uppermost fan blade assembly 110. The end fan disk 130 is mainly used to connect to the driver, which drives the entire cross-flow fan blade 100 to rotate.

[0068] Furthermore, a plurality of blades 114 are also provided on the side of the end fan disk 130 near the rotating fan disk 116. The plurality of blades 114 are spaced apart on the end fan disk 130, and the blades 114 have the same shape and structure as the blades 114 of the fan blade assembly 110. In the retracted state, the blades 114 connected to the end fan disk 130 are also housed in the blades 114 of the fan blade assembly 110 connected thereto.

[0069] The working principle of the cross-flow fan blade 100 provided in this embodiment is as follows: In this embodiment, in the retracted state, multiple fan blade assemblies 110 can move along a first direction, so that the blades 114 of the multiple fan blade assemblies 110 can be sequentially accommodated in the blades 114 of the adjacent fan blade assembly 110, so that the cross-flow fan blade 100 is in the retracted state. During the process of the cross-flow fan blade 100 gradually unfolding from the retracted state, the blades 114 gradually slide relative to the blades 114 of the adjacent fan blade assembly 110 until the first fixing part 1167 cooperates with the second fixing part 1141, and the first limiting part cooperates with the second limiting part 1123. Then, the rotating fan disk 116 is rotated so that the rotating fan disk 116 drives the blades 114 of the previous fan blade assembly 110 and the fixed fan disk 112 to rotate, so that the fan blades of the previous fan blade assembly 110 and the fan blades of the current fan blade assembly 110 are not collinear, that is, the transition grooves 1121 of the previous fan blade assembly 110 and the current fan blade assembly 110 are misaligned.

[0070] In summary, the cross-flow fan 100 provided in this embodiment allows multiple fan blade assemblies 110 to be sequentially housed in the blades 114 of adjacent fan blade assemblies 110 in the same direction, enabling the multiple fan blade assemblies 110 of the cross-flow fan 100 to be stacked. This reduces the overall length of the cross-flow fan 100, reduces the volume occupied by the cross-flow fan 100 during transportation, and, since the cross-flow fan 100 is in a retracted state, reduces the probability of the cross-flow fan 100 breaking during transportation.

[0071] Second Embodiment

[0072] This embodiment provides an air conditioner. The cross-flow fan blade 100 of the air conditioner provided in this embodiment can be in a retracted state during transportation, reducing the volume occupied by the cross-flow fan blade 100 during transportation. At the same time, since the cross-flow fan blade 100 is in a retracted state, the probability of the cross-flow fan blade 100 breaking during transportation is reduced.

[0073] For the sake of brevity, any parts not mentioned in this embodiment can be referred to in the first embodiment.

[0074] In this embodiment, the air conditioner includes the cross-flow fan blade 100 provided in the first embodiment.

[0075] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A cross-flow impeller, characterized by, The through-flow fan blade (100) comprises a plurality of fan blade assemblies (110); Each of the fan blade assemblies (110) comprises a fixed fan disc (112) and a plurality of blades (114), the plurality of blades (114) are arranged on the fixed fan disc (112) in a spaced manner, the plurality of blades (114) are hollow structures, the fixed fan disc (112) is provided with a plurality of transition grooves (1121), the plurality of transition grooves (1121) are in one-to-one correspondence with the internal cavities of the plurality of blades (114). The blades (114) of the fan blade assemblies (110) can pass through the transition grooves (1121) of the adjacent fan blade assemblies (110) and be accommodated in the internal cavities of the corresponding blades (114). The plurality of fan blade assemblies (110) can move in the same direction, so that the blades (114) of the plurality of fan blade assemblies (110) can be sequentially accommodated in the blades (114) of the adjacent fan blade assemblies (110), so that the through-flow fan blade (100) is in a contracted state.

2. The cross-flow impeller of claim 1, wherein, The fan blade assembly (110) further comprises a rotating fan disc (116), the rotating fan disc (116) is arranged on the side of the fixed fan disc (112) away from the blades (114), the rotating fan disc (116) is provided with a connecting groove (1161), the blades (114) of the adjacent fan blade assemblies (110) cooperate with the connecting groove (1161).

3. The cross-flow impeller of claim 2, wherein, The side of the rotating fan disc (116) close to the fixed fan disc (112) is provided with a first limiting portion, and the side of the fixed fan disc (112) away from the blades (114) is provided with a second limiting portion (1123); under the condition that the through-flow fan blade (100) is unfolded, the first limiting portion cooperates with the second limiting portion (1123).

4. The cross-flow impeller of claim 3, wherein, The second limiting portion (1123) is a limiting groove arranged on the fixed fan disc (112), and the first limiting portion is protruded on the rotating fan disc (116), and the first limiting portion cooperates with the limiting groove.

5. The cross-flow impeller of claim 4, wherein, The first limiting portion comprises a first limiting segment (1164) and a second limiting segment (1165) connected with each other, one end of the second limiting segment (1165) away from the first limiting segment (1164) is connected with the rotating fan disc (116), the second limiting portion (1123) comprises a first groove segment (1124) and a second groove segment (1125) connected with each other, the first groove segment (1124) is arranged close to the blades (114), the width of the first groove segment (1124) is greater than the width of the second groove segment (1125), the first groove segment (1124) cooperates with the first limiting segment (1164), and the second groove segment (1125) cooperates with the second limiting segment (1165).

6. The cross-flow impeller of claim 5, wherein, The first limiting section (1164) has an inclined guide surface (1166), under the condition that the guide surface (1166) is disengaged from the second slot section (1125), the first slot section (1124) cooperates with the first limiting section (1164), and the second slot section (1125) cooperates with the second limiting section (1165).

7. The cross-flow impeller of claim 2, wherein, The connecting slot (1161) is provided with a first fixing portion (1167), and one end of the blade (114) away from the fixed wind disc (112) is provided with a second fixing portion (1141); under the condition that the cross-flow fan blade (100) is unfolded, the second fixing portion (1141) cooperates with the first fixing portion (1167) of the rotating wind disc (116) of the adjacent wind blade assembly (110).

8. The cross-flow impeller of claim 7, wherein, The second fixing portion (1141) is a fixing slot provided on the blade (114), the fixing slot is in communication with the internal cavity of the blade (114), and the first fixing portion (1167) is protruded on the side wall of the connecting slot (1161).

9. The cross-flow impeller of claim 1, wherein, Under the condition that the cross-flow fan blade (100) is unfolded, the blade (114) of the wind blade assembly (110) is arranged in a staggered manner with the transition slot (1121) of the adjacent wind blade assembly (110).

10. An air conditioner characterized by comprising: The air conditioner comprises the cross-flow fan blade (100) according to any one of claims 1-9.

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