Cross-flow fan and air conditioner

Abstract

The present application relates to the technical field of air conditioning devices, and discloses an air conditioner, including: a cross-flow fan including an impeller, and a cavity is formed inside the impeller; a flow guiding structure is arranged in the cavity and divides the cavity into a plurality of air ducts. By arranging the flow guiding structure in the cavity inside the cross-flow fan, the flow guiding structure divides the cavity into a plurality of air ducts, enabling the air flow to flow along the air ducts after entering the cross-flow fan and finally flowing out of the cross-flow fan, thereby realizing the guiding of the air flow, and capable of reducing the air supply resistance and noise of the air conditioner.

Description

Technical Field

[0001] This application relates to the technical field of air conditioning devices, for example, to a cross-flow fan and an air conditioner. Background Art

[0002] With the popularization of air conditioners and the promotion of the concept of health, users' requirements for the comfort of air conditioners are getting higher and higher. In the heating mode, it is hoped that the hot air blows towards the ground to achieve carpet-style air supply. In the case of carpet-style air supply, the hot air is less dense than the cold air, and the hot air blowing towards the ground will continuously rise, quickly raising the room temperature. If the hot air is directly blown towards the upper part of the room, the hot air will gather in the upper part and it is difficult to sink, resulting in an uncomfortable feeling of warm head and cold feet. In the cooling mode, it is hoped that the cold air blows towards the upper part of the room to achieve shower-style air supply. In the case of shower-style air supply, the cold air blowing towards the upper part of the room will continuously sink, quickly reducing the room temperature. If the cold air is directly blown towards the ground, the cold air will gather in the lower part of the room, causing the phenomenon of cold feet and hot head, and directly blowing on people will cause physical discomfort.

[0003] The prior art controls the air flow to blow in two directions, up and down, by adding a partition near the air outlet of the air duct. The partition realizes the diversion by blocking part of the air flow. In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art: forcibly changing the direction of the air flow by setting the partition will bring problems of increased wind resistance and increased noise. Summary of the Invention

[0004] To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. The summary is not a general review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments, but rather serves as a preface to the following detailed description.

[0005] The embodiments of the present disclosure provide a cross-flow fan and an air conditioner to solve the problems of large air supply wind resistance and increased noise of the air conditioner.

[0006] The embodiments of the present disclosure provide a cross-flow fan, including: an impeller, with a cavity formed inside; a flow guiding structure, arranged in the cavity and dividing the cavity into a plurality of air ducts.

[0007] In some embodiments, the flow guiding structure includes: a flow guiding member, arranged close to the inner edge of the impeller.

[0008] In some embodiments, the flow guiding member extends along the length direction of the impeller and has a cross-section in the shape of a quasi-ellipse.

[0009] In some embodiments, the flow structure further includes: a first flow guiding vane, extending along the length direction of the impeller and dividing the cavity into a first air duct and a second air duct; wherein, the flow guiding member is located in the first air duct.

[0010] In some embodiments, the first flow guide vane includes: a first side portion facing the inner side of the impeller; a second side portion opposite to the first side portion in position; wherein the thickness of the first side portion is less than or equal to the thickness of the second side portion.

[0011] In some embodiments, the flow guide structure further includes: a second flow guide vane disposed on both sides of the first flow guide vane and extending along the length direction of the impeller.

[0012] In some embodiments, the second flow guide vane includes: a first blade disposed in the first air duct; a second blade disposed in the second air duct.

[0013] In some embodiments, the flow guide structure further includes: a third flow guide vane disposed between the second blade and the impeller, close to the inner edge of the impeller, and opposite to the flow guide member in position.

[0014] In some embodiments, the flow guide structure further includes: a fourth flow guide vane disposed between the second blade and the third flow guide vane, and / or disposed between the first blade and the flow guide member.

[0015] In some embodiments, the width of the fourth flow guide vane is less than the width of the third flow guide vane.

[0016] In some embodiments, the cross-flow fan further includes: a driving mechanism connected to the flow guide structure to drive the flow guide structure to rotate.

[0017] In some embodiments, the driving mechanism includes: a bearing embedded in the cavity, with the outer ring connected to the cross-flow fan and the inner ring provided with a fixing plate; a motor connected to the fixing plate to drive the fixing plate to rotate; wherein the flow guide structure is connected to the fixing plate.

[0018] An embodiment of the present disclosure also provides an air conditioner including the cross-flow fan provided in any one of the foregoing embodiments.

[0019] The cross-flow fan and the air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects: a flow guide structure is provided in the cavity inside the cross-flow fan, and the flow guide structure divides the cavity into multiple air ducts, enabling the air flow to flow along the air ducts after entering the inside of the cross-flow fan and finally flowing out of the cross-flow fan, thereby realizing the guidance of the air flow and being able to reduce the air supply resistance and noise of the air conditioner.

[0020] The above general description and the following description are only exemplary and explanatory and are not used to limit the present application. Description of the Drawings

[0021] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a proportional limitation, and among them:

[0022] Figure 1 is a schematic structural diagram of a cross-flow fan provided by an embodiment of the present disclosure;

[0023] Figure 2 is Figure 1 the B-B cross-sectional view of

[0024] Figure 3 is Figure 1 the A-A cross-sectional view of

[0025] Figure 4 is the transverse cross-sectional view of the flow guide member;

[0026] Figure 5 is a schematic structural diagram of another cross-flow fan provided by an embodiment of the present disclosure;

[0027] Figure 6 is a schematic structural diagram of a flow guiding structure and a driving mechanism provided by an embodiment of the present disclosure;

[0028] Figure 7 is a schematic cross-sectional view of an air conditioner provided by an embodiment of the present disclosure;

[0029] Figure 8 is a schematic cross-sectional view of an air conditioner provided by an embodiment of the present disclosure.

[0030] Reference numerals:

[0031] 10, impeller; 20, cavity; 30, flow guiding structure; 31, flow guide member; 310, tip; 311, arc portion; 312, transition portion; 32, first flow guiding vane; 33, second flow guiding vane; 330, first blade; 331, second blade; 34, third flow guiding vane; 35, fourth flow guiding vane; 41, bearing; 42, motor; 43, fixing plate; 50, housing; 51, first air outlet; 52, second air outlet. Detailed implementation manners

[0032] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are only for reference and illustration purposes and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, a sufficient understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and air conditioners can be shown in a simplified manner to simplify the drawings.

[0033] In the description and claims of the embodiments of the present disclosure and the above-mentioned drawings, terms such as "first" and "second" are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so as to implement the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0034] In the embodiments of the present disclosure, the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "middle", "outer", "front", and "back" is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and their embodiments, and are not used to limit that the indicated air conditioner, component or component must have a specific orientation, or be constructed and operated in a specific orientation. And, in addition to being able to represent an orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0035] In addition, the terms "arrangement", "connection", and "fixation" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication between two air conditioners, components or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0036] Unless otherwise specified, the term "plurality" means two or more.

[0037] In the embodiments of the present disclosure, the character " / " means that the front and rear objects are in an "or" relationship. For example, A / B means: A or B.

[0038] The term "and / or" is an associated relationship describing an object, indicating that three relationships can exist. For example, A and / or B means: A or B, or, these three relationships of A and B.

[0039] It should be noted that, without conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0040] Combined with Figure 1 、 2 As shown in FIG. 2 or 3, the embodiments of the present disclosure provide a cross-flow fan, including an impeller 10 and a flow guiding structure 30. A cavity 20 is formed inside the impeller 10, and the flow guiding structure 30 is arranged in the cavity 20 and divides the cavity 20 into a plurality of air ducts.

[0041] A guide structure 30 is provided in the cavity 20 inside the cross-flow fan, and the guide structure 30 divides the cavity 20 into a plurality of air ducts, so that the airflow can flow along the air ducts after entering the cross-flow fan and finally flow out of the cross-flow fan, thereby guiding the airflow and reducing the wind resistance and noise of the air supply.

[0042] The impeller 10 of the crossflow fan is multi-blade and long cylindrical. When the impeller 10 rotates, the airflow enters the blade grid from the opening of the impeller 10, passes through the inside of the impeller 10, and is discharged into the volute from the blade grid on the other side to form a working airflow. The flow of airflow in the impeller 10 is very complicated, and the airflow velocity field is unstable. There is also a vortex in the impeller 10, with the center located near the volute tongue. The existence of the vortex causes a circulating flow to be generated at the output end of the impeller 10. Outside the vortex, the airflow streamlines in the impeller 10 are arc-shaped. Therefore, the flow velocity at each point on the outer circumference of the impeller 10 is inconsistent. The closer to the vortex center, the greater the velocity, and the closer to the volute shell, the smaller the velocity. The airflow velocity and pressure at the fan outlet are not uniform. The position of the vortex has a greater impact on the performance of the crossflow fan. The center of the vortex is close to the inner circumference of the impeller 10 and close to the volute tongue, and the fan performance is better; the center of the vortex is far away from the vortex tongue, the area of ​​the circulating flow increases, the fan efficiency decreases, and the flow instability increases.

[0043] The conventional crossflow fan relies on the external volute tongue and volute to form an eccentric vortex to achieve the crossflow effect. The present application achieves the crossflow effect by providing a flow guide structure 30 in the crossflow fan and forming an eccentric vortex through internal shaping. It is possible to save the installation of a volute and a volute tongue outside the crossflow fan, thereby reducing the size of the air conditioner. The flow guide structure 30 divides the cavity 20 into a plurality of air ducts, so that the airflow flows according to the guidance of the flow guide structure 30, thereby enhancing the crossflow effect.

[0044] Optionally, the guide structure 30 is in the form of a sheet. The sheet-shaped guide structure 30 can guide the airflow, and minimize the obstruction to the airflow and reduce the space occupied. Optionally, the sheet-shaped guide structure 30 is arc-shaped. Designing the guide structure 30 in an arc shape can change the direction of the airflow flow, so that the direction of the airflow flow can adapt to the direction of the air duct of the air conditioner. There is a gap between the guide structure 30 and the impeller 10, that is, the guide structure 30 does not contact the inner side of the cross-flow fan, so that interference with the rotation of the cross-flow fan can be avoided.

[0045] Combination Figure 1 , 2As shown in FIGS. 3 and 6, in some embodiments, the flow guiding structure 30 extends along the length direction of the impeller 10. The extending direction of the flow guiding structure 30 is the same as the length direction of the impeller 10. In this way, the flow guiding structure 30 can extend from one end to the other end of the cross-flow fan within the cavity 20 and is distributed throughout the cavity 20. Thus, the airflows entering from various regions in the length direction of the impeller 10 can all be guided by the flow guiding structure 30 to flow.

[0046] Optionally, the flow guiding structure 30 is sheet-shaped and has a uniform thickness. The sheet-shaped flow guiding structure 30 with a uniform thickness is convenient for processing and manufacturing, and can guide the airflows entering the interior of the cross-flow fan.

[0047] Optionally, the flow guiding structure 30 is sheet-shaped and has a non-uniform thickness. The sheet-shaped flow guiding structure 30 with a non-uniform thickness can change its thickness according to the characteristics of the airflow field within the cavity 20 of the cross-flow fan, reduce the wind resistance, increase the cross-flow air volume, and enhance the cross-flow effect.

[0048] The flow guiding structure 30 includes a first end and a second end, and the first end and / or the second end is fixed inside the air conditioner. The flow guiding structure 30 extends along the length direction of the impeller 10 and has two ends. By fixing the first end and / or the second end, the fixation of the flow guiding structure 30 within the cavity 20 is achieved. The first end and / or the second end of the flow guiding structure 30 can extend out from the interior of the cross-flow fan or be of the same length as the end of the cross-flow fan, both of which can achieve the fixation of the flow guiding structure 30. Optionally, the cross-flow fan further includes a fixing plate 43, and the fixing plate 43 is disposed at the first end and / or the second end of the flow guiding structure 30, and the fixing plate 43 is connected to the end of the impeller 10. By providing the fixing plate 43, the fixation of the flow guiding structure 30 is achieved.

[0049] In some embodiments, the flow guiding structure 30 includes a flow guiding member 31, and the flow guiding member 31 is disposed close to the inner edge of the impeller 10. The flow guiding member 31 is close to the inner edge of the impeller 10 and is used to generate an eccentric vortex at the flow guiding member 31 when the airflow passes through the cavity 20, so as to change the airflow direction, and the formed airflow state is close to or the same as that when there is a volute tongue outside the cross-flow fan. Optionally, the flow guiding member 31 is elliptical. The elliptical flow guiding member 31 can force the airflow to generate an eccentric vortex within the cavity 20.

[0050] In some embodiments, the flow guiding member 31 extends along the length direction of the impeller 10 and has a cross-section in a shape similar to an ellipse. The flow guiding member 31 extending along the length direction of the impeller 10 can enable the airflows entering from various regions in the length direction of the impeller 10 to all form uniformly distributed eccentric vortices under the action of the flow guiding member 31. The shape similar to an ellipse is an ellipse with an irregular shape. The shape similar to an ellipse is more beneficial for reducing the wind resistance and enabling the airflow to form an eccentric vortex at the flow guiding member 31.

[0051] Combined with Figure 4As shown, optionally, the flow guide 31 has an oppositely positioned tip 310 and an arc portion 311, wherein the arc portion 311 is closer to the air inlet of the air conditioner than the tip 310. The arc portion 311 is located on the windward side, and the tip 310 is located on the air supply side, that is, the air flow flows from the arc portion 311 to the tip 310. After the air flow enters the cavity 20, it flows from the arc portion 311 of the flow guide 31 to the tip 310, forming an eccentric vortex at the flow guide 31 and having a relatively small wind resistance.

[0052] Optionally, the flow guide 31 further includes a transition portion 312, and the transition portion 312 connects the tip 310 and the arc portion 311. Through the connection of the transition portion 312, the flow guide 31 is formed into an approximately elliptical shape. Optionally, the transition portion 312 on one side of the flow guide 31 faces the inside of the impeller 10. In this way, it is beneficial for the flow guide 31 to play a role and cause the air flow to form an eccentric vortex at the flow guide 31.

[0053] Combined with Figure 3 、 6 As shown in, in some embodiments, the flow guide structure 30 further includes a first guide vane 32. The first guide vane 32 extends along the length direction of the impeller 10 and divides the cavity 20 into a first air duct and a second air duct. Among them, the flow guide 31 is located in the first air duct.

[0054] The first guide vane 32 divides the cavity 20 into a first and a second air duct. After the air flow enters the cavity 20, it can be split into the first air duct and the second air duct and flow out of the cavity 20. The first guide vane 32 extends along the length direction of the impeller 10, and the formed first air duct and second air duct also extend along the length direction of the impeller 10. The air flow entering each area of the cross-flow fan can be split into the first air duct and the second air duct. The flow guide 31 is arranged in the first air duct, causing the air flow to generate an eccentric vortex here, and cooperating with the guiding effect of the first guide vane 32 to make the air flow form a smooth and steady flow.

[0055] Through this embodiment, the air flow is guided by the first guide vane 32 in the cavity 20, strengthening the cross-flow effect and making the air flow flow more smoothly and steadily.

[0056] Optionally, the first guide vane 32 is arc-shaped, and part of the blade segment is parallel to the transition portion 312 of the flow guide 31. In this way, on the basis of the eccentric vortex formed by the flow guide 31, the first guide vane 32 cooperates with the flow guide 31 to guide the air flow, making the flow state of the air flow relatively smooth. The first guide vane 32 can be in an S shape and have a relatively small curvature, which is beneficial for the air flow to flow smoothly. This can reduce the wind resistance effect on the air flow and reduce the noise.

[0057] Optionally, the first flow guide vane 32 is disposed at the center of the cavity 20 or near the center of the cavity 20, so as to divide the airflow entering the cavity 20 into two parts to the greatest extent and improve the guiding effect on the airflow. The first flow guide vane 32 being disposed at the center of the cavity 20 or near the center of the cavity 20 means that the blade center of the first flow guide vane 32 is disposed at the center of the cavity 20 or near the center of the cavity 20.

[0058] Optionally, the thickness of the first flow guide vane 32 is less than that of the flow guide member 31. The main function of the first flow guide vane 32 is to guide the flow, so its thickness can be relatively small, which can reduce the wind resistance and the space occupation. The main function of the flow guide member 31 is to force the airflow to generate an eccentric vortex, so its thickness is relatively large, and it is necessary to significantly change the flow direction of the airflow.

[0059] In some embodiments, the first flow guide vane 32 includes a first side portion and a second side portion; the first side portion faces the inner side of the impeller 10; the second side portion is opposite to the first side portion in position, wherein the thickness of the first side portion is less than or equal to the thickness of the second side portion.

[0060] Both the first side portion and the second side wall face the inner side of the impeller 10 and are opposite to each other in position. In practical applications, the second side portion can be located on the windward side. After the airflow enters the cavity 20, the flow direction is from the second side portion to the first side portion. Making the thickness of the first side portion less than that of the second side portion is beneficial to reducing the wind resistance, and the airflow can smoothly enter the first air duct and the second air duct separated by the first flow guide vane 32.

[0061] Optionally, the thickness of the first flow guide vane 32 gradually increases from the first side portion to the second side portion. In this way, the first flow guide vane 32 can smoothly adjust the flow state of the airflow and make the airflow flow smoothly and stably.

[0062] In some embodiments, the flow guide structure 30 further includes a second flow guide vane 33, and the second flow guide vane 33 is disposed on both sides of the first flow guide vane 32 and extends along the length direction of the impeller 10. By further dividing the airflow in the first air duct and the second air duct, the airflow is regularized and further guided, so as to enhance the through-flow effect of the airflow.

[0063] In some embodiments, the second flow guide vane 33 includes a first blade 330 and a second blade 331; the first blade 330 is disposed in the first air duct; the second blade 331 is disposed in the second air duct. The first blade 330 divides and guides the airflow in the first air duct, and the second blade 331 divides and guides the airflow in the second air duct.

[0064] Optionally, the two sides of the first blade 330 facing the impeller 10 have different thicknesses, with the thickness of one side being greater than that of the other side, and the side with the greater thickness is the windward side, which is closer to the air inlet of the air conditioner. In this way, the air flow passes between the first blade 330 and the first guide vane 32, and between the first blade 330 and the deflector 31, with less wind resistance, increased cross-flow air volume, enhanced cross-flow effect, and it is beneficial to form an eccentric vortex at the deflector 31. Optionally, the second blade 331 has a uniform thickness. In this way, when the air flow enters the second air duct where the second blade 331 is located, the air flow passes through both sides of the second blade 331, enhancing the cross-flow effect. The second blade 331 is far from the eccentric vortex at the deflector 31, and it is more suitable to use the second blade 331 with a uniform thickness.

[0065] Optionally, the maximum thickness of the first blade 330 is greater than the maximum thickness of the first guide vane 32. The first blade 330 is located between the deflector 31 and the first guide vane 32, and needs to cooperate with the first guide vane 32 for guiding the air flow and cooperate with the deflector 31 to form an eccentric vortex. Making the maximum thickness of the first blade 330 greater than the maximum thickness of the first guide vane 32 is beneficial to form the desired air flow dynamics.

[0066] Optionally, the first blade 330 is arc-shaped and convex in the direction away from the deflector 31. In this way, it is beneficial to form an eccentric vortex of the air flow at the deflector 31 and can guide the air flow to enhance the cross-flow effect. Optionally, the curvature of the first blade 330 is greater than the curvature of the first guide vane 32. Cooperating with the eccentric vortex forcedly formed at the deflector 31 to guide the air flow.

[0067] In some embodiments, the flow guiding structure 30 further includes a third guide vane 34, which is disposed between the second blade 331 and the impeller 10, close to the inner edge of the impeller 10, and is opposite to the deflector 31 in position. The third guide vane 34 is opposite to the deflector 31 in position, guiding the air flow at another position of the impeller 10 to enhance the cross-flow effect of the air flow. Optionally, the cross-section of the third guide vane 34 is fusiform or quasi-fusiform. The third guide vane 34 with a fusiform or quasi-fusiform cross-section has a good guiding effect on the air flow and can further enhance the cross-flow effect. Optionally, the maximum thickness of the third guide vane 34 is less than the maximum thickness of the deflector 31. The third guide vane 34 is the farthest from the deflector 31. In the presence of an eccentric vortex, the third guide vane 34 is located in the outermost layer of the air flow. When the maximum thickness of the third guide vane 34 is less than the maximum thickness of the deflector 31, the air flow can be guided to enhance the cross-flow effect.

[0068] In some embodiments, the flow guiding structure 30 further includes a fourth flow guiding vane 35, and the fourth flow guiding vane 35 is disposed between the second vane 331 and the third flow guiding vane 34, and / or between the first vane 330 and the flow guiding member 31. The fourth flow guiding vane 35 can further divert and guide the air flow in the first air duct and the second air duct, enhancing the through-flow effect of the air flow.

[0069] Exemplarily, the flow guiding structure 30 further includes a fourth flow guiding vane 35, and the fourth flow guiding vane 35 is disposed between the second vane 331 and the third flow guiding vane 34, and the fourth flow guiding vane 35 is close to the air flow inlet side of the impeller 10. When the air flow enters the second air duct under the guidance of the first flow guiding vane 32, it is diverted by the fourth flow guiding vane 35 and continues to be diverted, the air flow is further regularized, and the through-flow effect is enhanced.

[0070] Exemplarily, the flow guiding structure 30 further includes a fourth flow guiding vane 35, and the fourth flow guiding vane 35 is disposed between the first vane 330 and the flow guiding member 31, and the fourth flow guiding vane 35 is close to the air flow outlet side of the impeller 10. After passing through the eccentric vortex, the air flow is diverted and guided by the fourth flow guiding vane 35, and the flow becomes more stable and regular, further enhancing the through-flow effect.

[0071] Exemplarily, the flow guiding structure 30 further includes a fourth flow guiding vane 35, and the fourth flow guiding vane 35 is disposed between the second vane 331 and the third flow guiding vane 34, and between the first vane 330 and the flow guiding member 31. Disposing the fourth flow guiding vane 35 at both positions can further enhance the through-flow effect.

[0072] In some embodiments, the width of the fourth flow guiding vane 35 is smaller than the width of the third flow guiding vane 34. The fourth flow guiding vane 35 mainly plays a role in fine adjustment, can have a smaller width, also reduces the space occupied by the air duct, and minimizes the wind resistance as much as possible. Optionally, when there are two fourth flow guiding vanes 35, the two fourth flow guiding vanes 35 are located on the same diameter of the circular cross-section of the cavity 20. The guiding effect on the air flow is better, which is beneficial to enhancing the through-flow effect.

[0073] In some embodiments, the flow guiding structure 30 is rotatably disposed within the cavity 20. The flow guiding structure 30 is capable of rotation. By rotating, the outflow direction of the air flow entering the cross-flow fan can be adjusted. In practical applications, by adjusting the rotation angle of the flow guiding structure 30, the air outlet direction of the air conditioner can be adjusted. For example, for a wall-mounted air conditioner with an upper air outlet and a lower air outlet, by adjusting the angle of the flow guiding structure 30, it is possible to control whether the air flow exits from the upper air outlet or the lower air outlet. In coordination with the cooling or heating mode of the air conditioner, the user comfort can be enhanced. With this flow guiding structure 30 in the air conditioner, the volute tongue and volute can be omitted, and the air sent out by the cross-flow fan is still close to or the same as when the volute tongue and volute are used. Moreover, the flow guiding structure 30 guides the air flow from inside the cross-flow fan, with less air resistance. The air flow can smoothly change the flow direction and the noise is reduced.

[0074] Combined with Figure 2 、 5 As shown in FIGS. 6, in some embodiments, the cross-flow fan further includes a driving mechanism. The driving mechanism is connected to the flow guiding structure 30 and drives the flow guiding structure 30 to rotate. The driving mechanism is used to drive the flow guiding structure 30 to rotate so that the flow guiding structure 30 rotates to the desired position. Optionally, the air conditioner includes a controller which is connected to the driving mechanism to control the driving of the driving mechanism. The controller can control the driving mechanism to make the flow guiding structure 30 rotate to the set position and then stop.

[0075] Combined with Figure 7 、 8 As shown in FIGS., optionally, the air conditioner includes a housing 50. The housing 50 is provided with a first air outlet 51 and a second air outlet 52. The driving mechanism drives the flow guiding structure 30 to rotate so that the air flow discharge side of the cross-flow fan faces the first air outlet 51 or the second air outlet 52, thereby enabling the air flow to be sent out from the first air outlet 51 or the second air outlet 52. For example, in a wall-mounted air conditioner, the first air outlet 51 is located above the second air outlet 52. In this way, it is possible to adjust the wall-mounted unit to blow air upward or downward. In coordination with the cooling or heating mode of the air conditioner, comfortable air supply can be achieved.

[0076] Combined with Figure 5 、 6 As shown in FIGS., in some embodiments, the driving mechanism includes a bearing 41 and a motor 42; the bearing 41 is embedded in the cavity 20, the outer ring is connected to the cross-flow fan, and the inner ring is provided with a fixing plate 43; the motor 42 is connected to the fixing plate 43 and drives the fixing plate 43 to rotate; wherein, the flow guiding structure 30 is connected to the fixing plate 43.

[0077] The bearing 41 is embedded in the cavity 20. The outer ring is connected to the cross-flow fan, and the fixing plate 43 of the inner ring is connected to the flow guiding structure 30 to fix the flow guiding structure 30 and the cross-flow fan. On the basis of connecting the flow guiding structure 30 and the cross-flow fan, the bearing 41 can enable the cross-flow fan and the flow guiding structure 30 to rotate independently without interference with each other. Moreover, it can keep the flow guiding structure 30 stable. The motor 42 is connected to the fixing plate 43 and is used to drive the fixing plate 43 to rotate, thereby driving the flow guiding structure 30 to rotate.

[0078] Optionally, bearings 41 and fixing plates 43 are provided at both ends of the flow guiding structure 30. In this way, the flow guiding structure 30 can be made more stable, avoiding shaking of the flow guiding structure 30 during rotation and enabling the flow guiding structure 30 to rotate smoothly. Among them, the motor 42 only needs to be connected to the fixing plate 43 of the bearing 41 at one end of the flow guiding structure 30, that is, one motor 42 is used to drive the flow guiding structure 30 to rotate.

[0079] The embodiment of the present disclosure also provides an air conditioner, including the cross-flow fan provided in any one of the foregoing embodiments. Optionally, the air conditioner is an air conditioner cabinet or an air conditioner wall-mounted unit. The cross-flow fan can be used in both the air conditioner cabinet and the air conditioner wall-mounted unit to guide the air flow, reduce the air supply resistance and noise of the air conditioner. The air conditioner can be provided with a volute tongue and a volute casing, or the installation of the volute casing and the volute tongue can be omitted.

[0080] The above description and the drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural and other changes. The embodiments only represent possible variations. Unless explicitly required, the individual components and functions are optional, and the order of operations can vary. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. The embodiments of the present disclosure are not limited to the structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A cross-flow fan, characterized in that, it comprises: an impeller, with a cavity formed inside; a flow guiding structure, arranged inside the cavity and dividing the cavity into a plurality of air ducts; the flow guiding structure comprises: a first flow guiding vane, extending along the length direction of the impeller and dividing the cavity into a first air duct and a second air duct; the first flow guiding vane comprises: a first side portion, facing the inner side of the impeller; a second side portion, opposite to the position of the first side portion; wherein, the thickness of the first side portion is less than or equal to the thickness of the second side portion.

2. The cross-flow fan according to claim 1, characterized in that, the flow guiding structure further comprises: a flow guiding member, arranged close to the inner edge of the impeller.

3. The cross-flow fan according to claim 2, characterized in that, the flow guiding member extends along the length direction of the impeller and has an approximately elliptical cross-section.

4. The cross-flow fan according to claim 2, characterized in that, the flow guiding member is located inside the first air duct.

5. The cross-flow fan according to claim 4, characterized in that, the flow guiding structure further comprises: second flow guiding vanes, arranged on both sides of the first flow guiding vane and extending along the length direction of the impeller.

6. The cross-flow fan according to claim 5, characterized in that, the second flow guiding vanes comprise: a first blade, arranged inside the first air duct; a second blade, arranged inside the second air duct.

7. The cross-flow fan according to claim 6, characterized in that, the flow guiding structure further comprises: a third flow guiding vane, arranged between the second blade and the impeller, close to the inner edge of the impeller, and opposite to the position of the flow guiding member.

8. The cross-flow fan according to claim 7, characterized in that, the flow guiding structure further comprises: a fourth flow guiding vane, arranged between the second blade and the third flow guiding vane, and / or, arranged between the first blade and the flow guiding member.

9. The cross-flow fan according to claim 8, characterized in that, the width of the fourth flow guiding vane is less than the width of the third flow guiding vane.

10. The cross-flow fan according to any one of claims 1 to 9, characterized in that, it further comprises: a driving mechanism, connected to the flow guiding structure and driving the flow guiding structure to rotate.

11. The cross-flow fan according to claim 10, characterized in that, the driving mechanism comprises: a bearing, embedded inside the cavity, with the outer ring connected to the cross-flow fan and a fixing plate arranged on the inner ring; a motor, connected to the fixing plate and driving the fixing plate to rotate; wherein, the flow guiding structure is connected to the fixing plate.

12. An air conditioner, characterized in that, it comprises the cross-flow fan according to any one of claims 1 to 11.

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