Air conditioner indoor unit

Abstract

The utility model provides an air conditioner indoor unit, including first air supply air duct, second air supply air duct, lead air duct, first intercommunication air duct and first air guide device. First air supply air duct has first air outlet. Second air supply air duct has second air outlet. Lead air duct is arranged between first air supply air duct and second air supply air duct, and lead air duct has third air outlet. First intercommunication air duct is arranged between lead air duct and first air supply air duct. The opening of first intercommunication air duct connected to first air supply air duct is first opening, and the opening of first intercommunication air duct connected to lead air duct is second opening. First air guide device is arranged at first intercommunication air duct, and first air guide device and first intercommunication air duct are arranged to make part of airflow of first air supply air duct enter lead air duct or make part of airflow of lead air duct enter first air supply air duct when first air supply air duct sends air. The above-mentioned setting is favorable to the uniform mixing of heat exchange airflow in first air supply air duct and airflow in lead air duct.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to an indoor unit of an air conditioner. Background Technology

[0002] Currently, some air conditioner indoor units have a first air supply duct, a second air supply duct, and an intake duct located between them, all opening forward. The intake duct runs through the casing of the indoor unit in a front-to-back direction. When the first and second air supply ducts blow air forward, they drive the airflow in the intake duct forward as well. The heat exchange airflow mixes with the airflow in the intake duct at the front of the indoor unit, making the airflow from the indoor unit closer to room temperature, resulting in a gentler cooling effect and a less dry heating effect. The current problem with this type of indoor unit is that the mixing effect between the airflow from the intake duct and the airflow from the first and second air supply ducts at the front of the indoor unit is not ideal, which can negatively impact the user experience. Utility Model Content

[0003] In view of the above problems, this utility model is proposed to provide an indoor unit of an air conditioner that overcomes or at least partially solves the above problems, so that the heat exchange airflow and the airflow in the air duct have a better mixing effect and improve the user experience.

[0004] Specifically, this utility model provides an indoor unit for an air conditioner, comprising: A first air supply duct, the first air supply duct having a first air outlet extending in a vertical direction; The second air supply duct has a second air outlet extending in a vertical direction; An air intake duct is disposed between the first air supply duct and the second air supply duct, and the air intake duct has a third air outlet extending in a vertical direction; The first ventilation duct is disposed between the air intake duct and the first air supply duct; the opening of the first ventilation duct connecting to the first air supply duct is the first opening, and the opening connecting to the air intake duct is the second opening. A first air guiding device is disposed at the first connecting ventilation duct. The first air guiding device and the first connecting ventilation duct are arranged such that when the first air supply duct supplies air, a portion of the airflow from the first air supply duct enters the air intake duct, or a portion of the airflow from the air intake duct enters the first air supply duct, or the first air supply duct is separated from the air intake duct.

[0005] Optionally, the indoor unit of the air conditioner further includes: The second ventilation duct is disposed between the air intake duct and the second air supply duct; The second air guide device is disposed at the second connecting ventilation duct. The second air guide device and the second connecting ventilation duct are arranged such that when the second air supply duct supplies air, a portion of the airflow from the second air supply duct enters the air intake duct, or a portion of the airflow from the air intake duct enters the second air supply duct, or the second air supply duct is separated from the air intake duct.

[0006] Optionally, the first connecting ventilation duct and the second connecting ventilation duct are symmetrically arranged about a first vertical plane extending front to back; the first air guiding device and the second air guiding device are symmetrically arranged about the first vertical plane; The first air supply duct and the second air supply duct are symmetrically arranged about the first vertical plane.

[0007] Optionally, the front edge of the first opening is located to the side and rear of the front edge of the second opening; The front edge of the first opening is located to the side front of the rear edge of the second opening.

[0008] Optionally, the plane containing the front edges of the first opening and the second opening forms an angle of less than 90° with the tangent of the duct wall of the first air supply duct adjacent to the air intake duct at the front edge of the first opening. The front wall of the first connecting ventilation duct and the duct wall of the first supply air duct adjacent to the exhaust air duct intersect at the rear edge of the first opening.

[0009] Optionally, the indoor unit of the air conditioner further includes: The first cross-flow impeller is vertically disposed within the first air supply duct; the duct wall of the first air supply duct adjacent to the air intake duct includes a volute-shaped surface that mates with the first cross-flow impeller. The first opening is disposed on the volute surface; The distance between the front edge of the first opening and the rotation axis of the first cross-flow wind turbine is the first distance, and the distance between the rear edge of the first opening and the rotation axis of the first cross-flow wind turbine is the second distance. The first distance is less than the second distance.

[0010] Optionally, the difference between the first distance and the radius of the first cross-flow wind turbine is a first difference. The difference between the second distance and the radius of the first cross-flow wind turbine is the second difference. The ratio between the first difference and the second difference is 2 / 5 to 3 / 5.

[0011] Optionally, the difference between the first distance and the radius of the first cross-flow wind turbine is a first difference. The minimum distance between the first cross-flow impeller and the volute surface is the third distance; The first difference is greater than the third distance.

[0012] Optionally, the position on the volute surface where the distance to the first cross-flow impeller is shortest is used as a reference position; The plane containing the reference position and the rotation axis of the first cross-flow wind turbine is the first plane; The plane containing the front edge of the first opening and the rotation axis of the first cross-flow wind turbine is the second plane; The angle between the first plane and the second plane is 80° to 110°; The angle between the plane containing the front edge and the rear edge of the first opening and the second plane is 80° to 110°.

[0013] Optionally, the first air guiding device includes: A first air guide plate has a first edge and a second edge disposed opposite to each other, and the first air guide plate is rotatably disposed at the first opening to have a first rotation position and a second rotation position. When the first air guide plate is in the first rotation position, it closes the first opening, and the second edge is located at the rear edge of the first opening; when the first air guide plate is in the second rotation position, the first edge is located on the rear wall surface of the first ventilation duct.

[0014] Optionally, when the first air guide plate is in the second rotation position, the first edge is located at the rear edge of the second opening.

[0015] Optionally, the rear edge of the second opening is located to the side front of the rear edge of the first opening; When the first air guide plate is in the second rotation position, the second edge is located behind the first edge, and the angle between the plane containing the second edge and the first edge and the second vertical plane extending in the lateral direction is within 5°; or, the second edge is located in front of the first edge, and the angle between the plane containing the second edge and the first edge and the second vertical plane extending in the lateral direction is within 10°; or, the plane containing the second edge and the first edge is a vertical plane extending in the lateral direction.

[0016] Optionally, when the first air guide plate is in the second rotation position, the angle between the plane containing the second edge and the first edge and the tangent of the duct wall adjacent to the first air supply duct at the front edge of the first opening is greater than 90°.

[0017] Optionally, the distance between the front edge of the first opening and the rotation axis of the first cross-flow wind turbine is a first distance, and the distance between the rear edge of the first opening and the rotation axis of the first cross-flow wind turbine is a second distance. When the first air guide plate is in the second rotation position, the distance between the second edge and the rotation axis of the first cross-flow wind turbine is the fifth distance; The fifth distance is less than the second distance, and the fifth distance is less than or equal to the first distance.

[0018] Optionally, the first air guide plate also has a third rotational position; When the first air guide plate is in the third rotating position, it guides the airflow out of the first connecting ventilation duct, and the first edge is located within the first connecting ventilation duct. The distance between the second edge and the plane containing the front edges of the first opening and the second opening is the sixth distance, and the distance between the first edge and the plane containing the front edges of the first opening and the second opening is the seventh distance, wherein the seventh distance is less than or equal to the sixth distance; The distance between the second edge and the rotation axis of the first cross-flow wind turbine is the eighth distance, which is less than the second distance and greater than the first distance.

[0019] Optionally, the first air guide device further includes: The second air guide plate has a third edge and a fourth edge that are disposed opposite to each other, and the second air guide plate is rotatably disposed at the second opening to have a fourth rotation position and a fifth rotation position; When the second air guide plate is in the fourth rotation position, it closes the second opening, and the fourth edge is located at the rear edge of the second opening; when the second air guide plate is in the fifth rotation position, the third edge is located in the air duct, and the angle between the plane containing the fourth edge and the third edge and the plane containing the front edge of the first opening and the front edge of the second opening is 0° to 5°.

[0020] Optionally, the fourth edge is located to the side front of the third edge; the fourth edge is located on the front wall surface of the first connecting ventilation duct; The angle between the plane containing the fourth edge and the third edge and the second vertical plane extending in the lateral direction is 20° to 40°.

[0021] Optionally, the second air guide plate also has a sixth rotational position; When the second air guide plate is in the sixth rotational position, and the first air guide plate is in the third rotational position, the fourth edge of the second air guide plate is in contact with the first air guide plate. The first air guide plate and the second air guide plate are parallel.

[0022] Optionally, the indoor unit of the air conditioner further includes: The third air guide device is installed at the first air outlet; The fourth air guide device is located at the second air outlet; The housing has a first air outlet located at the front of one side of the housing and a second air outlet located at the front of the other side of the housing.

[0023] Optionally, the section of the air duct located upstream of the second opening is tapered along the airflow direction.

[0024] In the indoor unit of this air conditioner, multiple air supply modes are provided. When the first air guide device opens and guides part of the heat exchange airflow from the first supply air duct into the exhaust air duct, part of the heat exchange airflow from the first supply air duct exits from the first air outlet, while another part flows into the exhaust air duct through the first connecting ventilation duct. After the heat exchange airflow flowing into the exhaust air duct merges with the room temperature airflow within the exhaust air duct, it exits from the exhaust air duct outlet. The second air outlet can be kept independently or closed. This arrangement facilitates the mixing of part of the heat exchange airflow from the first supply air duct with the room temperature airflow within the exhaust air duct, and also facilitates guiding more airflow out of the exhaust air duct. When the first air guide device reverses and guides part of the airflow from the exhaust air duct into the first supply air duct, part of the room temperature airflow from the exhaust air duct exits from the third air outlet, while another part enters the second opening and flows into the first supply air duct through the first connecting ventilation duct. The state of the second air outlet is adjusted as needed. This configuration allows some of the room-temperature airflow to mix with the heat exchange airflow in the first air supply duct in advance, which is beneficial for uniform airflow mixing. When the first air guide device closes the first connecting ventilation duct, the airflow from the first air supply duct, the second air supply duct, and the induced draft duct is sent out separately from their respective first air outlet, second air outlet, and third air outlet, without interfering with each other.

[0025] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0026] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 This is a schematic structural diagram of an indoor unit of an air conditioner according to an embodiment of the present utility model; Figure 2 This is a schematic structural diagram of an indoor unit of an air conditioner according to an embodiment of the present utility model; Figure 3 This is a schematic structural diagram of an indoor unit of an air conditioner according to an embodiment of the present utility model; Figure 4 This is a schematic structural diagram of an indoor unit of an air conditioner according to an embodiment of the present utility model; Figure 5 This is a schematic structural diagram of an indoor unit of an air conditioner according to an embodiment of the present utility model; Figure 6 yes Figure 5 Enlarged view of B in the middle; Figure 7 This is a schematic structural diagram of an indoor unit of an air conditioner according to an embodiment of the present utility model; Figure 8 This is a schematic structural diagram of an indoor unit of an air conditioner according to an embodiment of the present utility model; Figure 9 This is a schematic structural diagram of an indoor unit of an air conditioner according to an embodiment of the present utility model; Figure 10 Figure 9 Enlarged view of A in the middle; Figure 11 This is a partial schematic structural diagram of the indoor unit of an air conditioner according to an embodiment of the present utility model. Detailed Implementation

[0027] The following reference Figures 1 to 11 This description pertains to the indoor unit of an air conditioner according to an embodiment of the present invention. In this description, it should be understood that 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of the present invention, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0028] Unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," and "couple" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Furthermore, in the description of this embodiment, "above" or "below" the second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. That is, in the description of this embodiment, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "below" of the second feature can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] Figure 1 This is a schematic structural diagram of an indoor unit of an air conditioner according to an embodiment of the present invention. Figure 1 As shown, and refer to Figures 2 to 11This utility model provides an indoor unit for an air conditioner, including a first air supply duct 200, a second air supply duct 300, an exhaust duct 400, a first connecting ventilation duct 500, and a first air guiding device 600. The first air supply duct 200 has a first air outlet 201 extending vertically. The second air supply duct 300 has a second air outlet 301 extending vertically. The exhaust duct 400 is disposed between the first air supply duct 200 and the second air supply duct 300, and has a third air outlet 401 extending vertically. The first connecting ventilation duct 500 is disposed between the exhaust duct 400 and the first air supply duct 200. The opening of the first connecting ventilation duct 500 connecting to the first air supply duct 200 is a first opening 510, and the opening connecting to the exhaust duct 400 is a second opening 520. The first air guide device 600 is disposed at the first ventilation duct 500. The first air guide device 600 and the first ventilation duct 500 are arranged such that when the first air supply duct 200 supplies air, a portion of the airflow from the first air supply duct 200 enters the air intake duct 400, or a portion of the airflow from the air intake duct 400 enters the first air supply duct 200, or the first air supply duct 200 is separated from the air intake duct 400.

[0032] The indoor unit of the air conditioner has multiple air supply modes. When the first air guide device 600 opens and guides part of the heat exchange airflow from the first supply air duct 200 into the exhaust air duct 400, part of the heat exchange airflow from the first supply air duct 200 is discharged from the first air outlet 201, and another part of the heat exchange airflow flows into the exhaust air duct 400 through the first connecting ventilation duct 500. After the heat exchange airflow flowing into the exhaust air duct 400 merges with the room temperature airflow in the exhaust air duct 400, it is discharged from the third air outlet of the exhaust air duct 400. The second air outlet 301 can be kept independently or closed. This arrangement is beneficial for the mixing of part of the heat exchange airflow from the first supply air duct 200 with the room temperature airflow in the exhaust air duct 400, and also for guiding more airflow out of the exhaust air duct 400. When the first air guiding device 600 reverses the airflow from the induced draft duct 400 into the first supply air duct 200, a portion of the room-temperature airflow from the induced draft duct 400 is discharged from the third air outlet 401, and another portion of the room-temperature airflow enters the second opening 520 and flows into the first supply air duct 200 through the first connecting ventilation duct 500. The state of the second air outlet 301 is adjusted according to requirements. This arrangement allows a portion of the room-temperature airflow to mix with the heat exchange airflow in the first supply air duct 200 in advance, which is beneficial for uniform airflow mixing. When the first air guiding device 600 closes the first connecting ventilation duct 500, the airflow from the first supply air duct 200, the second supply air duct 300, and the induced draft duct 400 is discharged separately from their respective first air outlet 201, second air outlet 301, and third air outlet 401, without interfering with each other.

[0033] In some embodiments of this utility model, such as Figure 3 As shown, the indoor unit of the air conditioner also includes a second ventilation duct 700 and a second air guide device 800. The second ventilation duct 700 is disposed between the exhaust air duct 400 and the supply air duct 300. The second air guide device 800 is disposed at the second ventilation duct 700. The second air guide device 800 and the second ventilation duct 700 are arranged such that when the second supply air duct 300 supplies air, a portion of the airflow from the second supply air duct 300 enters the exhaust air duct 400, or a portion of the airflow from the exhaust air duct 400 enters the second supply air duct 300, or the second supply air duct 300 is separated from the exhaust air duct 400.

[0034] When the second air guide device 800 opens and guides part of the airflow from the second supply air duct 300 into the exhaust air duct 400, a portion of the heat-exchange airflow from the second supply air duct 300 is discharged from the second outlet 301, while another portion flows into the exhaust air duct 400 through the second connecting ventilation duct 700. The heat-exchange airflow flowing into the exhaust air duct 400 merges with the room-temperature airflow within the exhaust air duct 400 and is then discharged from the third outlet 401. This arrangement facilitates the mixing of a portion of the heat-exchange airflow from the second supply air duct 300 with the room-temperature airflow within the exhaust air duct 400, and also helps guide more airflow out of the exhaust air duct 400. When the second air guide device 800 reverses the flow, guiding part of the airflow from the exhaust air duct 400 into the second supply air duct 300, a portion of the room-temperature airflow from the exhaust air duct 400 is discharged from the outlet, while another portion flows into the second supply air duct 300 through the second connecting ventilation duct 700. This arrangement allows some of the room-temperature airflow to mix with the heat exchange airflow within the second supply air duct 300 in advance, which is beneficial for uniform airflow mixing. When the second air guide device 800 closes the second connecting ventilation duct 700, the second supply air duct 300 and the exhaust air duct 400 supply air independently. Of course, the first air guide device 600 and the second air guide device 800 can also cooperate with each other.

[0035] In some embodiments of this utility model, such as Figure 3 As shown, the first air guiding device 600 and the second air guiding device 800 can work together. For example, the first air guiding device 600 guides the airflow from the first supply air duct 200 into the first connecting ventilation duct 500 and flows towards the exhaust air duct 400, while the second air guiding device 800 guides the airflow from the second supply air duct 300 into the second connecting ventilation duct 700 and flows towards the exhaust air duct 400. Alternatively, the first air guiding device 600 guides the airflow from the exhaust air duct 400 into the first connecting ventilation duct 500 and flows towards the first supply air duct 200, while the second air guiding device 800 guides the airflow from the exhaust air duct 400 into the second connecting ventilation duct 700 and flows towards the second supply air duct 300.

[0036] In some embodiments of this utility model, such as Figures 1 to 5 As shown, the first ventilation duct 500 and the second ventilation duct 700 are symmetrically arranged about a first vertical plane extending front to back. The first air guide device 600 and the second air guide device 800 are also symmetrically arranged about the first vertical plane. This arrangement facilitates the coordinated operation of the first air guide device 600 and the second air guide device 800, resulting in a more uniform mixing of the heat exchange airflow and the airflow at room temperature.

[0037] In some embodiments of this utility model, as shown in the figures, such as Figures 1 to 5 As shown, the first and second air supply ducts are symmetrically arranged about the first vertical plane.

[0038] In some embodiments of this utility model, such as Figure 10 As shown, the front edge 511 of the first opening 510 is located to the side and rear of the front edge 521 of the second opening 520. The front edge 511 of the first opening 510 is located to the side and front of the rear edge 522 of the second opening 520.

[0039] The first opening 510 and the second opening 520 partially overlap but are not completely aligned in the front-to-back direction. When airflow flows in from the first opening 510, it naturally transitions to the second opening 520 along the inclined direction of the leading edge of the first opening 510, forming an oblique guide path to avoid impact. Conversely, when airflow flows in from the second opening 520, it can also smoothly enter the first opening 510 along the edge contour of the second opening 520, reducing airflow separation and turbulence, thereby reducing wind resistance loss and noise generated by airflow friction.

[0040] In some embodiments of this utility model, the plane containing the front edge 511 of the first opening 510 and the front edge 521 of the second opening 520 forms an angle of less than 90° with the cross-section of the wall of the first air supply duct 200 adjacent to the air intake duct 400 at the front edge 511 of the first opening 510. The front wall of the first connecting ventilation duct 500 intersects the cross-section of the wall of the first air supply duct 200 adjacent to the air intake duct 400 at the rear edge of the first opening 510. This arrangement facilitates airflow from the first air supply duct 200 into the first connecting ventilation duct 500.

[0041] In some embodiments of this utility model, such as Figure 1 and Figure 11As shown, the indoor unit of the air conditioner also includes a first cross-flow fan 900. The first cross-flow fan 900 is vertically disposed within the first air supply duct 200. The duct wall of the first air supply duct 200 adjacent to the exhaust duct 400 includes a volute-shaped surface 210 that mates with the first cross-flow fan 900. A first opening 510 is disposed on the volute-shaped surface 210. The distance between the front edge 511 of the first opening 510 and the rotation axis of the first cross-flow fan 900 is a first distance E, and the distance between the rear edge of the first opening 510 and the rotation axis of the first cross-flow fan 900 is a second distance F. The first distance E is less than the second distance F.

[0042] When the vertically arranged first cross-flow impeller 900 rotates, it draws in air from the inlet side, and then guides the airflow to the first outlet 201 through the volute surface 210 that cooperates with the first cross-flow impeller 900, forming the basic air supply airflow. The first opening 510 is set on the volute surface 210, and the first distance from its front edge to the impeller axis is less than the second distance from its rear edge to the axis. This setting is conducive to guiding the airflow from the first opening 510 into the first ventilation duct 500, and preventing the airflow from flowing out of the first air supply duct 200.

[0043] In some embodiments of this utility model, such as Figure 11 As shown, the difference between the first distance E and the radius of the first cross-flow impeller 900 is the first difference G, and the difference between the second distance F and the radius of the first cross-flow impeller 900 is the second difference H. The ratio between the first difference G and the second difference H is 2 / 5 to 3 / 5. That is, the ratio of the distance from the front edge 511 of the first opening 510 to the outer edge of the first cross-flow impeller 900 to the distance from the rear edge of the first opening 510 to the outer edge of the first cross-flow impeller 900 is 2 / 5 to 3 / 5. Preferably, the ratio between the first difference G and the second difference H is 1 / 2. This arrangement also helps to guide the airflow from the first opening 510 into the first ventilation duct 500, preventing the airflow from flowing out of the first air supply duct 200.

[0044] In some embodiments of this utility model, such as Figure 11 As shown, the minimum distance between the first cross-flow impeller 900 and the volute surface 210 is the third distance N. The first difference G is greater than the third distance N.

[0045] The above settings can ensure that the first cross-flow impeller 900 can stably output air, and at the same time, the first air supply duct 200 and the first connecting ventilation duct 500 can stably introduce the airflow generated by the first cross-flow impeller 900.

[0046] In some embodiments of this utility model, as shown in the figure, the lateral distance between the rear edge of the first outlet and the front edge of the first outlet is less than the first difference G.

[0047] In some embodiments of this utility model, such as Figure 11 As shown, the duct wall of the first supply air duct 200, away from the exhaust air duct 400, includes a volute-shaped surface that mates with the first cross-flow impeller 900. The minimum distance between the first cross-flow impeller 900 and the volute-shaped surface is a fourth distance M. The first difference G is greater than the fourth distance M. The above settings ensure the normal operation of the first cross-flow impeller 900.

[0048] In some embodiments of this utility model, such as Figure 11 As shown, the width C of the first air outlet 201 is greater than the width B of the inlet of the first air supply duct 200. This arrangement reduces the airflow resistance within the first air supply duct 200.

[0049] In some embodiments of this utility model, such as Figure 11 As shown, the minimum width D of the first air supply duct 200 is less than the width B of the inlet of the first air supply duct 200.

[0050] In some embodiments of this utility model, such as Figure 11 As shown, the position on the volute surface 210 with the shortest distance to the first cross-flow impeller 900 is the reference position. The plane containing the reference position and the rotation axis of the first cross-flow impeller 900 is the first plane 910. The plane containing the front edge 511 of the first opening 510 and the rotation axis of the first cross-flow impeller 900 is the second plane 920. The angle α between the first plane 910 and the second plane 920 is 80° to 110°. The angle between the plane containing the front edge 511 and the rear edge of the first opening 510 and the second plane 920 is 80° to 110°.

[0051] The above settings can precisely define the position of the first opening 510, allowing the first opening 510 to accurately align with the area where the airflow generated by the first cross-flow impeller 900 is most stable. This ensures efficient airflow transmission while avoiding noise and energy loss caused by airflow impact.

[0052] In some embodiments of this utility model, such as Figure 5 and Figure 6 As shown, the first air guiding device 600 includes a first air guiding plate 610. The first air guiding plate 610 has a first edge 611 and a second edge 612 disposed opposite to each other. The first air guiding plate 610 is rotatably disposed at the first opening 510 to have a first rotation position and a second rotation position. When the first air guiding plate 610 is in the first rotation position, the first opening 510 is closed, and the second edge 612 is located at the rear edge of the first opening 510. When the first air guiding plate 610 is in the second rotation position, the first edge 611 is on the rear wall surface of the first ventilation duct 500.

[0053] When the first air guide plate 610 rotates to the first rotation position, it closes the first opening 510. When the first air guide plate 610 rotates to the second rotation position, it can guide the airflow in the induced draft duct 400 into the first supply air duct 200. The above configuration can realize the switching of the first connecting ventilation duct 500 from isolation to airflow guidance.

[0054] Furthermore, in some embodiments of this utility model, such as Figure 5 and Figure 6 As shown, when the first air guide plate 610 is in the second rotation position, the first edge 611 is located at the rear edge 522 of the second opening 520. That is to say, the first edge 611 of the first air guide plate 610 is close to the rear edge 522 of the second opening 520, which can minimize the airflow resistance of the first air guide plate 610 to the airflow entering the first ventilation duct 500.

[0055] In some embodiments of this utility model, such as Figure 6 and Figure 10 As shown, the rear edge 522 of the second opening 520 is located to the side front of the rear edge 512 of the first opening 510. When the first air guide plate 610 is in the second rotation position, the second edge 612 is located to the side rear of the first edge 611, and the angle between the plane containing the second edge 612 and the first edge 611 and the second vertical plane extending in the lateral direction is within 5°.

[0056] This setup is beneficial for guiding the airflow into the intake duct 400, and also for guiding the airflow entering the first ventilation duct 500 into the first supply duct 200.

[0057] In some other embodiments of the present invention, the second edge 612 and the first edge 611 are located at the front side, and the angle between the plane containing the second edge 612 and the first edge 611 and the second vertical plane extending in the lateral direction is within 10°.

[0058] In some other embodiments of this utility model, the plane containing the second edge 612 and the first edge 611 is a vertical plane extending in the lateral direction.

[0059] In some embodiments of this utility model, such as Figure 6 As shown, when the first air guide plate 610 is in the second rotation position, the plane containing the second edge 612 and the first edge 611 is at an angle b greater than 90° with the duct wall of the adjacent air intake duct 400 of the first air supply duct 200 at the front edge 511 of the first opening 510.

[0060] This configuration facilitates the flow of air from the intake duct 400 into the first ventilation duct 200, reducing both resistance and noise.

[0061] In some embodiments of this utility model, such as Figure 6 As shown, when the first air guide plate 610 is in the second rotation position, the plane containing the second edge 612 and the first edge 611 is at an angle c less than 90° with the duct wall of the air duct 400 adjacent to the first air supply duct 200 at the rear edge 522 of the second opening 520.

[0062] In some embodiments of this utility model, when the first air guide plate 610 is in the second rotation position, the distance between the second edge 612 and the rotation axis of the first cross-flow impeller 900 is a fifth distance. The fifth distance is less than the second distance F, and the fifth distance is less than or equal to the first distance.

[0063] This configuration prevents the airflow blown from the cross-flow fan from entering the first ventilation duct 500 as it flows along the volute profile 210, thus avoiding conflict with the airflow entering the first ventilation duct from the exhaust duct 400.

[0064] In some embodiments of this utility model, such as Figure 4 As shown, the first air guide plate 610 also has a third rotational position. When the first air guide plate 610 is in the third rotational position, it guides the airflow out of the first connecting ventilation duct 500. The first edge 611 is located within the first connecting ventilation duct 500. The distance between the second edge 612 and the plane containing the front edges 511 of the first opening 510 and the front edges 521 of the second opening 520 is the sixth distance. The distance between the first edge 611 and the plane containing the front edges 511 of the first opening 510 and the front edges 521 of the second opening 520 is the seventh distance. The seventh distance is less than or equal to the sixth distance. The distance between the second edge 612 and the rotation axis of the first cross-flow fan 900 is the eighth distance. The eighth distance is less than the second distance and greater than the first distance.

[0065] When the first guide vane 610 rotates to the third rotation position, it can guide airflow into the first connecting ventilation duct 500 and out through the second outlet, mixing with the airflow in the induced draft duct 400. A seventh distance less than or equal to the sixth distance allows the second edge 612 of the first guide vane 610 on the front side to be closer to the front duct wall of the first connecting ventilation duct 500, increasing the angle between the airflow flowing along the volute profile 210 and entering the first connecting ventilation duct 500, resulting in smoother airflow into the first connecting ventilation duct 500. An eighth distance less than the second distance and an eighth distance greater than the first distance can prevent mechanical interference between the first guide vane 610 and the edge of the first opening 510, ensuring the safety of the first guide vane 610 during rotation.

[0066] In some embodiments of this utility model, such as Figure 1 , Figure 5 and Figure 10 As shown, the first air guiding device 600 also includes a second air guiding plate 620. The second air guiding plate 620 has a third edge 621 and a fourth edge 622 disposed opposite to each other. The second air guiding plate 620 is rotatably disposed at the second opening 520 to have a fourth rotation position and a fifth rotation position. When the second air guiding plate 620 is in the fourth rotation position, the second opening 520 is closed, and the fourth edge 622 is located at the rear edge 522 of the second opening 520. When the second air guiding plate 620 is in the fifth rotation position, the third edge 621 is located within the air duct 400, and the angle between the plane containing the fourth edge 622 and the third edge 621 and the plane containing the front edge 511 of the first opening 510 and the front edge 521 of the second opening 520 is 60° to 80°.

[0067] When the second air guide plate 620 rotates to the fourth rotation position, the second air guide plate 620 closes the second opening 520. When the second air guide plate 620 rotates to the fifth rotation position, it helps to guide the airflow in the induced draft duct 400 into the first supply air duct 200.

[0068] Furthermore, in some embodiments of this utility model, such as Figure 5 As shown, when the second air guide plate 620 rotates to the fifth rotation position, the fourth edge 622 is located to the side and front of the third edge 621. The fourth edge 622 is located on the front wall surface of the first ventilation duct 500. The angle between the plane containing the fourth edge 622 and the third edge 621 and the second vertical plane extending in the lateral direction is 20° to 40°. The above arrangement allows the second air guide plate 620 to guide the airflow within the air duct 400 to enter from the rear side of the second air guide plate 620.

[0069] In some embodiments of this utility model, such as Figure 8 As shown, the second air guide plate 620 also has a sixth rotational position. When the second air guide plate 620 is in the sixth rotational position and the first air guide plate 610 is in the third rotational position, the fourth edge 622 of the second air guide plate 620 contacts the first air guide plate 610. The first air guide plate 610 and the second air guide plate 620 are parallel.

[0070] The above arrangement connects the first air guide plate 610 and the second air guide plate 620 together, which is more conducive to guiding the airflow blown out by the first cross-flow fan wheel 900 into the first ventilation duct 500.

[0071] In some embodiments of this utility model, such as Figure 1As shown, the indoor unit of the air conditioner also includes a third air guide device 110, a fourth air guide device 120, and a housing 100. The third air guide device 110 is located at the first air outlet 201. The fourth air guide device 120 is located at the second air outlet 301. The first air outlet 201 is located at the front of one side of the housing 100, and the second air outlet 301 is located at the front of the other side of the housing 100.

[0072] The third air guide device 110 has multiple air ducts inside. Each air duct includes a first air duct section and a second air duct section that are interconnected. The inlet of the first air duct section is the air duct inlet, and the outlet of the second air duct section is the air duct outlet. The angle between the first and second air duct sections is 130° to 140°, the angle between the first air duct section and the horizontally extending vertical plane is 0° to 5°, and the outlet of the second air duct section faces forward. This arrangement can increase the air outlet angle of the indoor unit of the air conditioner, thus serving more users. The fourth air guide device has the same structure as the third air guide device.

[0073] In some embodiments of this utility model, the third air guide device 110 and the fourth air guide device 120 are rotatable, thereby enabling the indoor unit of the air conditioner to have more air outlet modes. For example, Figure 2 In the jet-flow uniform airflow mode shown, the third air guide device 110 and the fourth air guide device 120 rotate so that the airflow blown from the first air outlet 201 and the second air outlet 301 is directed to the lateral side and the front side. The first air guide device 600 and the second air guide device 800 guide part of the heat exchange airflow into the first connecting ventilation duct 500 and the second connecting ventilation duct 700 respectively, and then into the induced draft duct 400, where it mixes with the airflow in the induced draft duct 400 and is blown out from the third air outlet 401. Figure 3 The jet-flow uniform airflow and circumferential airflow modes are shown. In this mode, the third air guide device 110 and the fourth air guide device 120 rotate so that the airflow blown from the first air outlet 201 and the second air outlet 301 is directed forward. The first air guide device 600 and the second air guide device 800 guide part of the heat exchange airflow into the first connecting ventilation duct 500 and the second connecting ventilation duct 700 respectively, and then into the induced draft duct 400. After mixing with the airflow in the induced draft duct 400, it is blown out from the third air outlet 401. Figure 4 In the jet-flow uniform airflow opening mode shown, the first air outlet 201 and the second air outlet 301 are closed. The first air guide device 600 and the second air guide device 800 guide all the heat exchange airflow into the first connecting ventilation duct 500 and the second connecting ventilation duct 700 respectively, and then into the induced draft duct 400. After mixing with the airflow in the induced draft duct 400, it is blown out from the third air outlet 401. Figure 5In the mixed air open state shown, the third air guide device 110 and the fourth air guide device 120 rotate to blow airflow from the first air outlet 201 and the second air outlet 301 towards the lateral side and the front side. The first air guide device 600 and the second air guide device 800 guide the airflow with room temperature into the first ventilation duct 500 and the second ventilation duct 700 respectively, and into the first air supply duct 200 and the second air supply duct 300. After mixing with the heat exchange airflow, it is blown out from the first air outlet 201 and the second air outlet 301 respectively.

[0074] In some embodiments of this utility model, such as Figure 8 As shown, when the indoor unit of the air conditioner is in jet airflow mode, the angle K between the first air guide device 600 and the second air guide device 800 is greater than 90°. This setting is beneficial to increasing the airflow speed in the air duct 400 and to mixing air.

[0075] In some embodiments of this utility model, such as Figure 8 As shown, the section of the air duct 400 located upstream of the second opening 520 gradually narrows along the airflow direction.

[0076] The above settings can increase the flow velocity of the airflow entering the air duct 400, which is beneficial for the airflow to mix with the heat exchange airflow in front after it flows out of the air duct 400.

[0077] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. An indoor unit for an air conditioner, characterized in that, include: A first air supply duct, the first air supply duct having a first air outlet extending in a vertical direction; The second air supply duct has a second air outlet extending in a vertical direction; An air intake duct is disposed between the first air supply duct and the second air supply duct, and the air intake duct has a third air outlet extending in a vertical direction; The first ventilation duct is disposed between the air intake duct and the first air supply duct; the opening of the first ventilation duct connecting to the first air supply duct is the first opening, and the opening connecting to the air intake duct is the second opening. A first air guiding device is disposed at the first connecting ventilation duct. The first air guiding device and the first connecting ventilation duct are arranged such that when the first air supply duct supplies air, a portion of the airflow from the first air supply duct enters the air intake duct, or a portion of the airflow from the air intake duct enters the first air supply duct, or the first air supply duct is separated from the air intake duct.

2. The indoor unit of the air conditioner according to claim 1, characterized in that, Also includes: The second ventilation duct is disposed between the air intake duct and the second air supply duct; The second air guide device is disposed at the second connecting ventilation duct. The second air guide device and the second connecting ventilation duct are arranged such that when the second air supply duct supplies air, a portion of the airflow from the second air supply duct enters the air intake duct, or a portion of the airflow from the air intake duct enters the second air supply duct, or the second air supply duct is separated from the air intake duct.

3. The indoor unit of the air conditioner according to claim 2, characterized in that, The first connecting ventilation duct and the second connecting ventilation duct are symmetrically arranged about a first vertical plane extending forward and backward; the first air guiding device and the second air guiding device are symmetrically arranged about the first vertical plane; The first air supply duct and the second air supply duct are symmetrically arranged about the first vertical plane.

4. The indoor unit of the air conditioner according to claim 1, characterized in that, The front edge of the first opening is located to the side and rear of the front edge of the second opening; The front edge of the first opening is located to the side front of the rear edge of the second opening.

5. The indoor unit of the air conditioner according to claim 4, characterized in that, The plane containing the front edges of the first opening and the second opening forms an angle of less than 90° with the tangent of the duct wall adjacent to the first air supply duct at the front edge of the first opening. The front wall of the first connecting ventilation duct and the duct wall of the first supply air duct adjacent to the exhaust air duct intersect at the rear edge of the first opening.

6. The indoor unit of the air conditioner according to claim 1, characterized in that, Also includes: The first cross-flow fan is vertically installed inside the first air supply duct; The duct wall adjacent to the first air supply duct includes a volute profile that mates with the first cross-flow impeller. The first opening is disposed on the volute surface; The distance between the front edge of the first opening and the rotation axis of the first cross-flow wind turbine is the first distance, and the distance between the rear edge of the first opening and the rotation axis of the first cross-flow wind turbine is the second distance. The first distance is less than the second distance.

7. The indoor unit of the air conditioner according to claim 6, characterized in that, The difference between the first distance and the radius of the first cross-flow wind turbine is the first difference value; The difference between the second distance and the radius of the first cross-flow wind turbine is the second difference. The ratio between the first difference and the second difference is 2 / 5 to 3 / 5.

8. The indoor unit of the air conditioner according to claim 6, characterized in that, The difference between the first distance and the radius of the first cross-flow wind turbine is the first difference value; The minimum distance between the first cross-flow impeller and the volute surface is the third distance; The first difference is greater than the third distance.

9. The indoor unit of the air conditioner according to claim 6, characterized in that, The reference position is the location on the volute surface where the distance to the first cross-flow impeller is the shortest. The plane containing the reference position and the rotation axis of the first cross-flow wind turbine is the first plane; The plane containing the front edge of the first opening and the rotation axis of the first cross-flow wind turbine is the second plane; The angle between the first plane and the second plane is 80° to 110°; The angle between the plane containing the front edge and the rear edge of the first opening and the second plane is 80° to 110°.

10. The indoor unit of the air conditioner according to claim 6, characterized in that, The first air guiding device includes: A first air guide plate has a first edge and a second edge disposed opposite to each other, and the first air guide plate is rotatably disposed at the first opening to have a first rotation position and a second rotation position. When the first air guide plate is in the first rotation position, it closes the first opening, and the second edge is located at the rear edge of the first opening; when the first air guide plate is in the second rotation position, the first edge is located on the rear wall surface of the first ventilation duct.

11. The indoor unit of the air conditioner according to claim 10, characterized in that, When the first air guide plate is in the second rotation position, the first edge is at the rear edge of the second opening.

12. The indoor unit of the air conditioner according to claim 10, characterized in that, The rear edge of the second opening is located to the side front of the rear edge of the first opening; When the first air guide plate is in the second rotation position, the second edge is located behind the first edge, and the angle between the plane containing the second edge and the first edge and the second vertical plane extending in the lateral direction is within 5°; or, the second edge is located in front of the first edge, and the angle between the plane containing the second edge and the first edge and the second vertical plane extending in the lateral direction is within 10°; or, the plane containing the second edge and the first edge is a vertical plane extending in the lateral direction.

13. The indoor unit of the air conditioner according to claim 10, characterized in that, When the first air guide plate is in the second rotation position, the angle between the plane containing the second edge and the first edge and the tangent of the duct wall adjacent to the first air supply duct at the front edge of the first opening is greater than 90°.

14. The indoor unit of the air conditioner according to claim 10, characterized in that, The distance between the front edge of the first opening and the rotation axis of the first cross-flow wind turbine is the first distance, and the distance between the rear edge of the first opening and the rotation axis of the first cross-flow wind turbine is the second distance. When the first air guide plate is in the second rotation position, the distance between the second edge and the rotation axis of the first cross-flow wind turbine is the fifth distance; The fifth distance is less than the second distance, and the fifth distance is less than or equal to the first distance.

15. The indoor unit of the air conditioner according to claim 10, characterized in that, The first air guide plate also has a third rotation position; When the first air guide plate is in the third rotating position, it guides the airflow out of the first connecting ventilation duct, and the first edge is located within the first connecting ventilation duct. The distance between the second edge and the plane containing the front edges of the first opening and the second opening is the sixth distance, and the distance between the first edge and the plane containing the front edges of the first opening and the second opening is the seventh distance, wherein the seventh distance is less than or equal to the sixth distance; The distance between the second edge and the rotation axis of the first cross-flow wind turbine is the eighth distance, which is less than the second distance and greater than the first distance.

16. The indoor unit of the air conditioner according to claim 15, characterized in that, The first air guide device also includes: The second air guide plate has a third edge and a fourth edge that are disposed opposite to each other, and the second air guide plate is rotatably disposed at the second opening to have a fourth rotation position and a fifth rotation position; When the second air guide plate is in the fourth rotation position, it closes the second opening, and the fourth edge is located at the rear edge of the second opening; when the second air guide plate is in the fifth rotation position, the third edge is located in the air duct, and the angle between the plane containing the fourth edge and the third edge and the plane containing the front edge of the first opening and the front edge of the second opening is 0° to 5°.

17. The indoor unit of the air conditioner according to claim 16, characterized in that, The fourth edge is located to the side and in front of the third edge; the fourth edge is located on the front wall surface of the first connecting ventilation duct; The angle between the plane containing the fourth edge and the third edge and the second vertical plane extending in the lateral direction is 20° to 40°.

18. The indoor unit of the air conditioner according to claim 16, characterized in that, The second air guide plate also has a sixth rotation position; When the second air guide plate is in the sixth rotational position, and the first air guide plate is in the third rotational position, the fourth edge of the second air guide plate is in contact with the first air guide plate. The first air guide plate and the second air guide plate are parallel.

19. The indoor unit of the air conditioner according to claim 1, characterized in that, Also includes: The third air guide device is installed at the first air outlet; The fourth air guide device is located at the second air outlet; The housing has a first air outlet located at the front of one side of the housing and a second air outlet located at the front of the other side of the housing.

20. The indoor unit of the air conditioner according to claim 1, characterized in that, The section of the air duct upstream of the second opening gradually narrows along the airflow direction.

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