Cross-flow wind wheel, cross-flow fan and air conditioner

Abstract

The utility model relates to the technical field of air conditioners, and discloses a cross-flow wind wheel, a cross-flow fan and an air conditioner. The cross-flow wind wheel comprises at least two connecting discs, and the at least two connecting discs are arranged at intervals in the first direction; the multiple deformation fan blades are connected between every two adjacent connecting discs, and the multiple deformation fan blades are sequentially arranged at intervals; a guide groove is formed in the connecting disc and provided with a first end, one end of each deformation fan blade is rotationally connected with the connecting disc, the other end of each deformation fan blade is in sliding fit with the guide groove, and the guide groove is used for guiding the other end of each deformation fan blade to move when the rotation direction of the cross-flow wind wheel is changed; when the cross-flow wind wheel rotates in the second direction or the third direction, the other ends of the deformation fan blades are arranged at the first ends of the guide grooves. According to the cross-flow wind wheel, the problem that the air outlet amount is low when the cross-flow wind wheel rotates reversely is solved.

Description

Technical Field

[0001] This application belongs to the field of air conditioner technology, and particularly relates to cross-flow impellers, cross-flow fans and air conditioners. Background Technology

[0002] When air conditioner outdoor units operate under low-temperature conditions, the heat exchanger of the outdoor unit is prone to icing. Related technologies typically employ a reverse-flow cross-flow fan to heat the refrigerant flowing out of the indoor unit's heat exchanger using the high-temperature air inside the indoor unit. This heated refrigerant then assists in defrosting and de-icing the outdoor unit. However, existing air conditioners have low airflow when the cross-flow fan reverses, resulting in poor heating of the refrigerant flowing out of the indoor unit's heat exchanger.

[0003] Therefore, improvements to existing technologies are necessary.

[0004] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0005] This application provides a cross-flow impeller, a cross-flow fan, and an air conditioner to solve the problem of low air volume when the cross-flow impeller reverses direction.

[0006] In a first aspect, embodiments of this application provide a cross-flow wind turbine, comprising:

[0007] At least two connecting disks, wherein the at least two connecting disks are spaced apart along a first direction;

[0008] Multiple deformable fan blades are connected between two adjacent connecting plates, and the multiple deformable fan blades are arranged sequentially at intervals along the circumference of the connecting plates;

[0009] The connecting plate is provided with a guide groove, the guide groove has a first end, one end of the deformable fan blade is rotatably connected to the connecting plate, and the other end is slidably engaged with the guide groove. The guide groove is used to guide the other end of the deformable fan blade to move when the cross-flow wind turbine changes its rotation direction.

[0010] When the cross-flow fan rotates along the second direction or the third direction, the other end of the deformable fan blade is placed at the first end of the guide groove.

[0011] In one possible implementation, the deformable fan blade includes a guide section and a first connecting section, the first connecting section being disposed at the other end of the guide section and slidably connected to the guide groove.

[0012] In one possible implementation, the guide groove includes a limiting groove and a sliding groove, and the groove wall of the guide groove is provided with a locking block for restricting the first connecting part from sliding out of the limiting groove;

[0013] When the cross-flow fan rotates along the second direction or the third direction, the first connecting part is placed in the limiting groove.

[0014] In one possible implementation, the deformable fan blade further includes a second connecting portion, which is disposed at the end of the air guide portion away from the first connecting portion. A connecting hole is provided on the connecting plate, and the second connecting portion is rotatably engaged with the connecting hole.

[0015] In one possible implementation, the angle between the direction of the second connecting part to the first end of the guide groove and the direction of the center of the connecting plate of the second connecting part is α, where 20°≤α≤30°.

[0016] In one possible implementation, at least a portion of the air guide is a deformation zone;

[0017] When the cross-flow fan rotates along the second direction, the deformation zone bulges outward toward the third direction; when the cross-flow fan rotates along the third direction, the deformation zone bulges outward toward the second direction.

[0018] In one possible implementation, the angle between the direction from the first end of the guide groove to the second end of the guide groove and the direction from the first end of the guide groove to the center of the connecting plate is β, where 25°≤β≤45°.

[0019] In one possible implementation, the cross-flow impeller further includes a fixed blade, which is disposed between two adjacent deformable blades and is fixedly connected to the connecting plate.

[0020] Secondly, embodiments of this application also provide a cross-flow fan, the cross-flow fan including the cross-flow impeller as described in any of the preceding claims.

[0021] Thirdly, embodiments of this application also provide an air conditioner, which includes the cross-flow fan as described above.

[0022] Compared with the prior art, this application has the following beneficial effects:

[0023] The cross-flow wind turbine provided in this application embodiment has a guide groove on the connecting plate, and the other end of the deformable blade slides into the guide groove. When the cross-flow wind turbine changes its rotation direction, the wind resistance on the deformable blade increases and acts on the other end of the deformable blade. The other end of the deformable blade can slide from the first end of the guide groove to the other end, and then slide back and remain at the first end. When the cross-flow impeller changes its rotation from the second direction to the third direction, the deformation blades gradually change from an outward convexity towards the second direction to an outward convexity towards the third direction. This helps reduce the resistance of airflow entering the cross-flow impeller from one side and reducing the resistance of airflow flowing out of the cross-flow impeller from the other side, thereby increasing the airflow volume when the cross-flow impeller rotates in the third direction. Similarly, when the cross-flow impeller changes its rotation from the second direction to the third direction, the deformation blades gradually change from an outward convexity towards the third direction to an outward convexity towards the second direction. This helps reduce the resistance of airflow entering the cross-flow impeller from the other side and reducing the resistance of airflow flowing out of the cross-flow impeller from the other side, thereby increasing the airflow volume when the cross-flow impeller rotates in the third direction. This improves the airflow volume after the cross-flow impeller changes its rotation direction, solving the problem of low airflow volume when the cross-flow impeller reverses direction. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0025] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0026] Figure 1 This is a schematic diagram of the first structure of the cross-flow wind turbine provided in the embodiments of this application.

[0027] Figure 2 This is a schematic diagram of a second structure of the cross-flow wind turbine provided in an embodiment of this application.

[0028] Figure 3 for Figure 2 The diagram shows an enlarged view of part A of the cross-flow wind turbine.

[0029] Figure 4 A flowchart illustrating the defrosting process of a cross-flow fan provided in an embodiment of this application.

[0030] In the figure: 1. Connecting plate; 11. Guide groove; 111. Limiting groove; 112. Sliding groove; 113. Locking block; 12. Connecting hole; 2. Deformable fan blade; 21. Air guide part; 22. First connecting part; 23. Second connecting part; 3. Fixed fan blade. Detailed Implementation

[0031] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0032] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0033] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0034] This application provides a cross-flow impeller, a cross-flow fan, and an air conditioner to solve the problem of low air volume when the cross-flow impeller reverses direction. The following description will be provided in conjunction with the accompanying drawings.

[0035] Please see Figure 1 and Figure 2 This application provides a cross-flow wind turbine, including at least two connecting disks 1 and multiple deformable blades 2. The at least two connecting disks 1 are spaced apart along a first direction, and the multiple deformable blades 2 are connected between two adjacent connecting disks 1. The multiple deformable blades 2 are arranged sequentially spaced apart along the circumference of the connecting disks 1. A guide groove 11 is provided on the connecting disk 1. The guide groove 11 has a first end. One end of the deformable blade 2 is rotatably connected to the connecting disk 1, and the other end is slidably engaged with the guide groove 11. The guide groove 11 is used to guide the other end of the deformable blade 2 to move when the cross-flow wind turbine changes its rotation direction. When the cross-flow wind turbine rotates along a second direction or a third direction, the other end of the deformable blade 2 is placed at the first end of the guide groove 11.

[0036] By opening a guide groove 11 on the connecting plate 1, the other end of the deformable blade 2 slides and engages with the guide groove 11, so that when the cross-flow wind turbine changes its rotation direction, the wind resistance experienced by the deformable blade 2 increases and acts on the other end of the deformable blade 2. The other end of the deformable blade 2 can slide from the first end of the guide groove 11 to the other end, and then slide back and remain at the first end. When the cross-flow impeller changes its rotation from the second direction to the third direction, the deformable blade 2 gradually changes from a deformation state convex outward in the second direction to a deformation state convex outward in the third direction. This helps reduce the resistance of airflow entering the cross-flow impeller from one side and reducing the resistance of airflow flowing out of the cross-flow impeller from the other side, thereby increasing the airflow volume when the cross-flow impeller rotates in the third direction. Similarly, when the cross-flow impeller changes its rotation from the second direction to the third direction, the deformable blade 2 gradually changes from a deformation state convex outward in the third direction to a deformation state convex outward in the second direction. This helps reduce the resistance of airflow entering the cross-flow impeller from the other side and reducing the resistance of airflow flowing out of the cross-flow impeller from the other side, thereby increasing the airflow volume when the cross-flow impeller rotates in the third direction. This improves the airflow volume after the cross-flow impeller changes its rotation direction, solving the problem of low airflow volume when the cross-flow impeller reverses direction.

[0037] Please see Figure 1 and Figure 2 In this embodiment, two connecting disks 1 are provided, and the two connecting disks 1 are arranged alternately along a first direction. Multiple deformable fan blades 2 are disposed between the two connecting disks 1, and the deformable fan blades 2 are arranged along the first direction. One end of each deformable fan blade 2 is connected to one of the connecting disks 1, and the other end is connected to the other connecting disk 1. The connecting disks 1 are disc-shaped, and the multiple deformable fan blades 2 are arranged at equal intervals along the circumference of the connecting disks 1, forming an air duct between adjacent deformable fan blades 2.

[0038] It should be noted that in this embodiment, the first direction is the length direction of the cross-flow wind turbine, the second direction and the third direction are both the circumferential direction of the connecting disk 1, and the second direction is opposite to the third direction.

[0039] Please see Figure 1 and Figure 3The deformable fan blade 2 includes an air guide section 21, a first connecting section 22, and a second connecting section 23. The first connecting section 22 is fixedly connected to the other end of the air guide section 21, and the second connecting section 23 is fixedly connected to the air guide section 21. The end of the first connecting section 22 away from the air guide section 21 is inserted into the guide groove 11 and slides with the guide groove 11, so that the other end of the air guide section 21 can move under the guidance of the guide groove 11. A connecting hole 12 is also provided on the connecting plate 1, and the second connecting section 23 is inserted into the connecting hole 12 and rotates with the connecting hole 12. In this embodiment, both the first connecting section 22 and the second connecting section 23 are cylindrical, and the connecting hole 12 is a circular hole.

[0040] Please see Figure 1 and Figure 2 At least a portion of the air guide section 21 is a deformation zone made of flexible material. When the cross-flow impeller rotates in the second direction, the deformation zone bulges outward in the third direction. The air duct formed between adjacent deformation blades 2 also bulges outward in the third direction. This helps to reduce the resistance of airflow entering the cross-flow impeller from one side and the resistance of airflow flowing out of the cross-flow impeller from the inside to the other side, thereby increasing the airflow volume of the cross-flow impeller to the other side. When the cross-flow impeller rotates in the third direction, the deformation zone bulges outward in the second direction. The air duct formed between adjacent deformation blades 2 also bulges outward in the second direction. This helps to reduce the resistance of airflow entering the cross-flow impeller from the other side and the resistance of airflow flowing out of the cross-flow impeller from the inside to one side, thereby increasing the airflow volume of the cross-flow impeller to one side. In some embodiments of this application, the air guide 21 is made entirely of a flexible material so that the air guide 21 can deform better.

[0041] Please see Figure 1 and Figure 3The guide groove 11 includes a limiting groove 111 and a sliding groove 112. A locking block 113 is provided on the groove wall of the guide groove 11 to restrict the first connecting part 22 from sliding out of the limiting groove 111. When the cross-flow impeller rotates along the second direction or the third direction, the first connecting part 22 is placed within the limiting groove 111. In this embodiment, the distance between the locking block 113 and the side wall directly opposite the locking block 113 is slightly smaller than the diameter of the first connecting part 22. This allows the deformable blades to remain deformed in the corresponding rotation direction when the cross-flow impeller maintains a low-speed rotation due to the blocking action of the locking block 113 on the first connecting part 22, which helps to increase the airflow of the cross-flow impeller at low speeds. When the cross-flow impeller changes its rotation direction and rotates at high speed, the wind resistance experienced by the air guide 21 increases and acts on the first connecting part 22, causing the first connecting part 22 to disengage from the limiting groove 111 and enter the sliding groove 112, and then return from the sliding groove 112 to the limiting groove 111. During this process, the deformable blade 2 gradually changes from a deformation state convex outward in the second direction to a deformation state convex outward in the third direction, or from a deformation state convex outward in the third direction to a deformation state convex outward in the second direction, so as to meet the cross-flow impeller's demand for air volume.

[0042] Please see Figure 2 and Figure 3 The angle between the direction of the second connecting part 23 to the first end of the guide groove 11 and the direction of the center of the connecting plate 1 of the second connecting part 23 is α, where 20°≤α≤30°. In this embodiment, the value of α is 27°. In some embodiments of this application, the value of α is any one of 20°, 21°, 22°, 23°, 24°, 25°, 26°, 28°, 29°, and 30°. By ensuring that 20°≤α≤30°, it is beneficial to increase the air volume of the cross-flow impeller.

[0043] Please see Figure 2 and Figure 3 The angle between the direction from the first end of the guide groove 11 to the second end of the guide groove 11 and the direction from the first end of the guide groove 11 to the center of the connecting plate 1 is β, where 25°≤β≤45°. In this embodiment, the value of β is 35°. In some embodiments of this application, the value of β is any one of 25°, 27°, 29°, 31°, 33°, 37°, 39°, 41°, 43°, and 45°. By making 25°≤β≤45°, it is not only convenient for the first connecting part 22 to move from the limiting groove 111 to the sliding groove 112, but also allows more deformable fan blades 2 to be installed on the connecting plate 1, which is beneficial to increasing the air volume.

[0044] Please see Figure 1 and Figure 2The cross-flow impeller also includes multiple fixed blades 3, which are positioned between two adjacent deformable blades 2. These fixed blades 3 are arranged at equal intervals along the circumference of the connecting plate 1. Each fixed blade 3 is fixedly connected to one of the two connecting plates 1 at both ends. The fixed blades 3 are used to fix the two connecting plates 1, reducing the probability of the cross-flow impeller twisting. The number of fixed blades 3 is n, and the number of deformable blades 2 is N, where 2 ≤ N / n ≤ 20. In this embodiment, N / n = 9. By ensuring that 2 ≤ N / n ≤ 20, not only are the fixing requirements of the connecting plates 1 met, thus reducing the probability of the cross-flow impeller twisting, but the number of flexible blades is also guaranteed, thereby increasing the airflow volume of the cross-flow impeller during reverse rotation.

[0045] This application also provides a cross-flow fan, which includes the cross-flow impeller as described above. Since this cross-flow fan has the aforementioned cross-flow impeller, it possesses at least some or all of the beneficial effects of the aforementioned cross-flow impeller, which will not be elaborated upon here.

[0046] This application also provides an air conditioner, which includes the cross-flow fan as described above. Since this air conditioner has the aforementioned cross-flow fan, indoor unit coil, and electric auxiliary heating device, it possesses at least some or all of the beneficial effects of the aforementioned cross-flow fan, which will not be elaborated upon here.

[0047] The air conditioner provided in this application embodiment controls the defrosting of the cross-flow fan according to the following method:

[0048] S1: Determine whether the air conditioner needs to defrost. If it is determined that the air conditioner needs to defrost, control the air conditioner to enter defrost mode.

[0049] S2: Obtain the first temperature T1 of the indoor unit coil and the first rotational speed V1 of the cross-flow fan. Based on the first temperature T1 of the indoor unit coil and the first rotational speed V1 of the cross-flow fan, obtain the first acceleration a1 of the cross-flow fan.

[0050] S3: Control the cross-flow wind turbine to decelerate to a stop using the first acceleration a1 of the cross-flow wind turbine;

[0051] S4: Obtain the second temperature T2 of the indoor unit coil and the type of the electric auxiliary heating device. Based on the second temperature T2 of the indoor unit coil and the type of the electric auxiliary heating device, obtain the second rotational speed V2 of the cross-flow fan and the second acceleration a2 of the cross-flow fan.

[0052] S5: Control the cross-flow wind turbine to rotate in the opposite direction, so that the cross-flow wind turbine accelerates to the second speed V2 of the cross-flow wind turbine with the second acceleration a2;

[0053] S6: Determine whether the outdoor unit has completed defrosting. If the outdoor unit has completed defrosting, control the air conditioner to exit defrosting mode.

[0054] In step S2, after obtaining the first temperature T1 of the indoor unit coil and the first rotational speed V1 of the cross-flow fan, the first acceleration a1 of the cross-flow fan can be determined by looking up a table. The correspondence between the first temperature T1 of the indoor unit coil, the first rotational speed V1 of the cross-flow fan, and the first acceleration a1 of the cross-flow fan can be shown in the following table:

[0055] <![CDATA[T1]]> <![CDATA[V1<R1]]> <![CDATA[R1≤V1<R2]]> <![CDATA[V1≥R2]]> <![CDATA[T1≥50℃]]> 0.3*N 0.5*N 0.7*N <![CDATA[40℃≤T1<50℃]]> 0.5*N 0.7*N 0.9*N <![CDATA[35℃≤T1<40℃]]> 1*N 1.1*N 1.2*N <![CDATA[30℃≤T1<35℃]]> 1.4*N 1.6*N 1.8*N <![CDATA[T1<30℃]]> 2*N 2.5*N 3*N

[0056] In the table, N represents the first acceleration of the cross-flow fan under standard conditions, which can be obtained experimentally. R1 and R2 are preset cross-flow fan rotation speeds, with R1 < R2. By decelerating the cross-flow fan at the first acceleration a1 value in the table, the amount of heat emitted into the room for defrosting can be reduced.

[0057] The electric auxiliary heating device can heat the air inside the air conditioner, thereby heating the working fluid. Electric auxiliary heating devices come in fixed-power and variable-power types. If the electric auxiliary heating device is determined to be of fixed power, then in step S4, after obtaining the second temperature T2 of the indoor unit coil, the second rotational speed V2 and the second acceleration a2 of the cross-flow fan can be determined by looking up a table. The correspondence between the second temperature T2 of the indoor unit coil, the second rotational speed V2 of the cross-flow fan, the second acceleration a2 of the cross-flow fan, and the on / off state of the electric auxiliary heating device is shown in the following table:

[0058] <![CDATA[T2]]> <![CDATA[V2]]> <![CDATA[a2]]> Electric auxiliary heating device on / off status <![CDATA[T2<30℃]]> <![CDATA[R3]]> 2*M Open <![CDATA[30℃≤T2<35℃]]> <![CDATA[R4]]> 1.5*M Open <![CDATA[35℃≤T2<40℃]]> <![CDATA[R5]]> 1*M closure <![CDATA[40℃≤T2<50℃]]> <![CDATA[R6]]> 0.75*M closure <![CDATA[T2≥50℃]]> 0 0 closure

[0059] In the table, M represents the second acceleration of the cross-flow wind turbine under standard conditions, and its value can be obtained through experiments. R3, R4, R5, and R6 are all preset cross-flow wind turbine rotation speeds, and R3 > R4 > R5 > R6 > 0.

[0060] If the electric auxiliary heating device is determined to be of variable power, then in step S4, after obtaining the second temperature T2 of the indoor unit coil, the second rotational speed V2 and the second acceleration a2 of the cross-flow fan can be determined by looking up a table. The corresponding relationship table of the second temperature T2 of the indoor unit coil, the second rotational speed V2 of the cross-flow fan, the second acceleration a2 of the cross-flow fan, and the on-state of the electric auxiliary heating device can be shown in the following table:

[0061]

[0062] In the table, M represents the second acceleration of the cross-flow fan under standard conditions, the value of which can be obtained experimentally. R5 is the preset cross-flow fan speed, R5 > 0, and P is the rated power of the electric auxiliary heating device. By accelerating the cross-flow fan at the second acceleration value a2 in the table, the heating of the working fluid in the indoor unit coil can be accelerated, thereby improving the defrosting effect of the air conditioner.

[0063] The process after step S6 also includes:

[0064] S7: Control the cross-flow wind turbine to decelerate to a standstill using the third acceleration a3 of the cross-flow wind turbine;

[0065] S8: Obtain the third temperature T3 of the indoor unit coil;

[0066] S9: Determine whether the third temperature T3 of the indoor unit coil is greater than the preset temperature T0. If the third temperature T3 of the indoor unit coil is greater than the preset temperature T0, control the cross-flow fan to rotate in the forward direction, so that the cross-flow fan is accelerated to the first speed V1 of the cross-flow fan with the first acceleration a1.

[0067] Both the third acceleration a3 and the preset temperature T0 are preset values. In this embodiment, the value of the third acceleration a3 is M, and the value of the preset temperature T0 is 38℃. By controlling the first acceleration a1 of the cross-flow fan to accelerate to the first rotational speed V1 of the cross-flow fan after the air conditioner exits the defrost mode, the air conditioner can quickly return to the normal heating state, reducing the impact of the defrost mode on the normal heating mode.

[0068] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0069] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A cross-flow impeller, characterized in that, include: At least two connecting disks (1) are arranged at intervals along a first direction; Multiple deformable fan blades (2) are connected between two adjacent connecting disks (1), and the multiple deformable fan blades (2) are arranged sequentially at intervals along the circumference of the connecting disks; The connecting plate (1) is provided with a guide groove (11), the guide groove (11) has a first end, one end of the deformable fan blade (2) is rotatably connected to the connecting plate (1), and the other end is slidably engaged with the guide groove (11). The guide groove (11) is used to guide the other end of the deformable fan blade (2) to move when the cross-flow fan wheel changes its rotation direction. When the cross-flow wind turbine rotates along the second direction or the third direction, the other end of the deformable wind blade (2) is placed at the first end of the guide groove (11).

2. The cross-flow impeller according to claim 1, characterized in that, The deformable fan blade (2) includes an air guide (21) and a first connecting part (22). The first connecting part (22) is disposed at the other end of the air guide (21) and is slidably connected to the guide groove (11).

3. The cross-flow impeller according to claim 2, characterized in that, The guide groove (11) includes a limiting groove (111) and a sliding groove (112). The groove wall of the guide groove (11) is provided with a locking block (113) for restricting the first connecting part (22) from sliding out of the limiting groove (111). When the cross-flow fan rotates along the second direction or along the third direction, the first connecting part (22) is placed in the limiting groove (111).

4. The cross-flow impeller according to claim 2, characterized in that, The deformable fan blade (2) also includes a second connecting part (23), which is located at the end of the air guide part (21) away from the first connecting part (22). A connecting hole (12) is provided on the connecting plate (1), and the second connecting part (23) is rotatably engaged with the connecting hole (12).

5. The cross-flow impeller according to claim 4, characterized in that, The angle between the direction of the second connecting part (23) to the first end of the guide groove (11) and the direction of the center of the connecting plate (1) of the second connecting part (23) is α, where 20°≤α≤30°.

6. The cross-flow wind turbine according to claim 2, characterized in that, At least a portion of the air guide section (21) is a deformation zone; When the cross-flow fan rotates along the second direction, the deformation zone bulges outward toward the third direction; when the cross-flow fan rotates along the third direction, the deformation zone bulges outward toward the second direction.

7. The cross-flow wind turbine according to claim 1, characterized in that, The angle between the direction from the first end of the guide groove (11) to the second end of the guide groove (11) and the direction from the first end of the guide groove (11) to the center of the connecting plate (1) is β, where 25°≤β≤45°.

8. The cross-flow wind turbine according to claim 1, characterized in that, The cross-flow wind turbine also includes a fixed blade (3), which is disposed between two adjacent deformable blades (2) and is fixedly connected to the connecting plate (1).

9. A cross-flow fan, characterized in that, The cross-flow fan includes the cross-flow impeller as described in any one of claims 1-8.

10. An air conditioner, characterized in that, The air conditioner includes the cross-flow fan as described in claim 9.

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