Air conditioner indoor unit and air conditioner unit

Abstract

The utility model relates to an air conditioner indoor unit and an air conditioning unit, the air conditioner indoor unit comprises a shell (1), the shell (1) comprises a top plate (11) and a bottom plate (12), the top plate (11) is provided with a first air outlet (10) and is used for air outlet in a refrigeration mode, and the bottom plate (12) is provided with a second air outlet (20) and is used for air outlet in a heating mode; the cross-flow fan (2) is arranged in the shell (1) and comprises an air duct assembly (21) and cross-flow fan blades (22) arranged in the air duct assembly (21), an air duct inlet (213) and an air duct outlet (214) are formed in the circumferential side wall of the air duct assembly (21), and the air duct assembly (21) can rotate around a first central axis (O1) of the air duct assembly (21) so that the air conditioner indoor unit can be switched between an upper air outlet state of a refrigeration mode and a lower air outlet state of a heating mode; and the heat exchanger (3) is in a straight plate shape and is positioned between the cross-flow fan (2) and the first air outlet (10) or the second air outlet (20).

Description

Technical Field

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

[0002] Currently, most mainstream air conditioner indoor units on the market share the same air duct in different operating modes, including cooling and heating, with the air outlet located at the bottom, mostly downward-facing. However, the different physical characteristics of cold and hot air place different requirements on the air duct and the direction of airflow. A single air duct will limit the air delivery range and the cooling and heating effect. Current solutions mostly change the direction of airflow by switching air guide vanes, but the improvement effect is not significant, cannot meet user needs, and the large extension distance of the air guide vanes affects the overall appearance. Utility Model Content

[0003] The embodiments of this disclosure provide an indoor air conditioning unit and an air conditioning system that can optimize the air delivery effect in cooling and heating modes.

[0004] According to one aspect of this disclosure, an air conditioning indoor unit is provided, comprising:

[0005] The housing includes a top plate and a bottom plate. The top plate has a first air outlet for air outlet in cooling mode, and the bottom plate has a second air outlet for air outlet in heating mode.

[0006] A cross-flow fan, housed within a casing, includes a duct assembly and cross-flow fan blades within the duct assembly. The circumferential sidewalls of the duct assembly form a duct inlet and an duct outlet. The duct assembly is rotatable about its first central axis, allowing the indoor unit of the air conditioner to switch between an upper air outlet state in cooling mode and a lower air outlet state in heating mode.

[0007] The heat exchanger is in the shape of a straight plate and is located between the cross-flow fan and the first or second air outlet.

[0008] In some embodiments, both the cross-flow fan and the heat exchanger extend along a first direction, and the heat exchanger is inclined so that its two ends in the width direction are at different heights.

[0009] In some embodiments, the tilt direction of the heat exchanger is configured to face the airflow entering from the first or second air outlet on the same side.

[0010] In some embodiments, the housing further includes a front plate connected between the top plate and the bottom plate, with the heat exchanger located in the area above the cross-flow fan and the lower end of the heat exchanger disposed near the front plate.

[0011] In some embodiments, a water receiving tray is also included, which is disposed within the housing and located only at the bottom of the lower side of the heat exchanger.

[0012] In some embodiments, the water tray is located in the rear region of the housing, and the housing also includes a rear plate connected between the top plate and the bottom plate, with the water tray integrally formed with the rear plate.

[0013] In some embodiments, the heat exchanger is located in the area above the cross-flow fan, and the water receiving tray is located above the middle height of the casing.

[0014] In some embodiments, the cross-flow fan extends along a first direction, and the duct assembly is provided with connecting rings at both ends of the duct inlet and duct outlet along the first direction;

[0015] The heat exchanger is located above the cross-flow fan, and its two ends abut and connect to the circumferential sidewalls of two connecting rings, respectively; or

[0016] The heat exchanger is located in the area below the cross-flow fan, and both ends of the heat exchanger are suspended and connected to the circumferential sidewalls of two connecting rings.

[0017] In some embodiments, the cross-flow fan blades have a second central axis, which is parallel to the first central axis, wherein:

[0018] The second central axis coincides with the first central axis, and the cross-flow fan blades are configured not to rotate during the rotation of the duct assembly; or

[0019] The second central axis is offset from the first central axis by a preset distance, and the cross-flow fan blades are configured to rotate along with the air duct assembly during rotation.

[0020] In some embodiments, the duct assembly includes an interconnected duct shell and a volute tongue, the duct shell and the volute tongue being spaced apart circumferentially along the duct assembly to form a duct inlet and a duct outlet on the circumferential sidewall of the duct assembly.

[0021] The indoor unit of the air conditioner also includes: a first baffle and a second baffle, which are located on the inner wall of a plate in the top or bottom plate away from the heat exchanger. A flow guide channel is formed between the first baffle and the second baffle, and the flow guide channel is connected to the air duct inlet and the air duct outlet.

[0022] In some embodiments, the housing includes a rear plate connected between a top plate and a bottom plate, a first air guide plate is rotatably provided at a first air outlet, and a second air guide plate is rotatably provided at a second air outlet.

[0023] With the first air outlet open, the first air guide plate tilts upward relative to the first air outlet; with the second air outlet open, the second air guide plate tilts downward relative to the second air outlet.

[0024] According to another aspect of this disclosure, an air conditioning unit is proposed, including the indoor unit of the above-described embodiments.

[0025] Based on the above technical solutions, the indoor unit of the air conditioner in this embodiment of the present disclosure has a rotatable air duct assembly installed inside the casing. By rotating the air duct assembly to change the airflow direction, the indoor unit can switch between an upward air outlet in cooling mode and a downward air outlet in heating mode, achieving upward blowing of cold air and downward blowing of hot air, thereby optimizing the cooling and heating effect and improving user comfort. By setting a first air outlet on the top plate for cooling mode and a second air outlet on the bottom plate for heating mode, the height difference of the indoor unit casing can be fully utilized to increase the uniformity of the distribution of cold and hot air during indoor movement, solving the problems of hot air rising, small air delivery range, and poor effect in heating mode. By setting air outlets on the top and bottom plates respectively to achieve upward and downward air delivery, there is no need to forcibly guide the airflow at the fan outlet to change the airflow direction, which can reduce airflow impact loss and increase the air delivery range during cooling and heating, improving human comfort. Moreover, the heat exchanger adopts a straight plate structure, which is simple in structure and easy to process, improving production efficiency, reducing manufacturing costs, and facilitating installation during assembly. Attached Figure Description

[0026] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this application, illustrate exemplary embodiments of the present disclosure and are used to explain the disclosure, but do not constitute an undue limitation thereof. In the drawings:

[0027] Figure 1A This is a schematic diagram of the structure of the first embodiment of the indoor unit of the air conditioner disclosed herein.

[0028] Figure 1B This is a schematic diagram of the first embodiment of the air conditioner indoor unit of this disclosure in the lower air outlet state of the heating mode.

[0029] Figure 1C This is a schematic diagram of the first embodiment of the air conditioner indoor unit of this disclosure in the cooling mode with the air outlet in the upper air outlet state.

[0030] Figure 2A This is a schematic diagram of the structure of a second embodiment of the indoor unit of the air conditioner disclosed herein.

[0031] Figure 2B This is a schematic diagram of the air outlet state of the second embodiment of the air conditioner indoor unit in heating mode.

[0032] Figure 2C This is a schematic diagram of the second embodiment of the air conditioner indoor unit of this disclosure in the upper air outlet state of the cooling mode.

[0033] Figure 3A This is a structural schematic diagram of the third embodiment of the indoor unit of the air conditioner disclosed herein.

[0034] Figure 3B This is a schematic diagram of the air outlet state of the third embodiment of the air conditioner indoor unit of this disclosure in heating mode.

[0035] Figure 3C This is a schematic diagram of the air conditioner indoor unit in the third embodiment of the present disclosure, in the upper air outlet state of the cooling mode.

[0036] Figure 4A This is a structural schematic diagram of the fourth embodiment of the indoor unit of the air conditioner disclosed herein.

[0037] Figure 4B This is a schematic diagram of the air outlet state of the fourth embodiment of the air conditioner indoor unit of this disclosure in heating mode.

[0038] Figure 4C This is a schematic diagram of the air conditioner indoor unit in the fourth embodiment of the present disclosure, in the upper air outlet state of the cooling mode.

[0039] Figure 5A This is a structural schematic diagram of the fifth embodiment of the indoor unit of the air conditioner disclosed herein.

[0040] Figure 5B This is a schematic diagram of the air outlet state of the fifth embodiment of the air conditioner indoor unit of this disclosure in cooling mode.

[0041] Figure 5C This is a schematic diagram of the fifth embodiment of the air conditioner indoor unit of this disclosure in the upper air outlet state of the heating mode.

[0042] Figure 6A This is a structural schematic diagram of the sixth embodiment of the indoor unit of the air conditioner disclosed herein.

[0043] Figure 6B This is a schematic diagram of the air outlet state of the sixth embodiment of the air conditioner indoor unit of this disclosure in cooling mode.

[0044] Figure 6C This is a schematic diagram of the sixth embodiment of the air conditioner indoor unit of this disclosure in the upper air outlet state of the heating mode.

[0045] Figure 7A This is a structural schematic diagram of the seventh embodiment of the indoor unit of the air conditioner disclosed herein.

[0046] Figure 7B This is a schematic diagram of the air outlet state of the seventh embodiment of the air conditioner indoor unit of this disclosure in cooling mode.

[0047] Figure 7C This is a schematic diagram of the air conditioner indoor unit of the seventh embodiment of the present disclosure in the upper air outlet state in heating mode.

[0048] Figure 8A This is a structural schematic diagram of the eighth embodiment of the indoor unit of the air conditioner disclosed herein.

[0049] Figure 8BThis is a schematic diagram of the air outlet state of the indoor unit of the air conditioner in the cooling mode according to the eighth embodiment of the present disclosure.

[0050] Figure 8C This is a schematic diagram of the upper air outlet state of the indoor unit of the air conditioner in heating mode according to the eighth embodiment of the present disclosure.

[0051] Explanation of reference numerals in the attached figures

[0052] 1. Housing; 11. Top plate; 10. First air outlet; 111. First air guide plate; 12. Bottom plate; 20. Second air outlet; 121. Second air guide plate; 13. Rear plate; 14. Front plate;

[0053] 2. Cross-flow fan; 21. Duct assembly; 22. Cross-flow fan blades; 211. Duct housing; 212. Volute; 213. Duct inlet; 214. Duct outlet;

[0054] 3. Heat exchanger;

[0055] 4. Water drip tray;

[0056] 51. First baffle; 52. Second baffle; 6. Third baffle; 7. Fourth baffle;

[0057] x, first direction; y, second direction; z, third direction. Detailed Implementation

[0058] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present disclosure or its application or use. The present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that the present disclosure will be thorough and complete, and will fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless specifically stated otherwise, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0059] The terms "first," "second," and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0060] In this disclosure, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0061] All terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0062] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0063] Based on the embodiments disclosed above, in the absence of explicit denial or conflict, the technical features of one embodiment may be advantageously combined with one or more other embodiments.

[0064] First, this disclosure proposes an indoor unit for an air conditioner, such as Figures 1A to 8C As shown, in some embodiments, the indoor unit of the air conditioner includes:

[0065] The housing 1 includes a top plate 11 and a bottom plate 12. The top plate 11 is provided with a first air outlet 10 for air outlet in cooling mode, and the bottom plate 12 is provided with a second air outlet 20 for air outlet in heating mode.

[0066] A cross-flow fan 2 is housed within a casing 1 and includes a duct assembly 21 and cross-flow fan blades 22 disposed within the duct assembly 21. The circumferential sidewalls of the duct assembly 21 form a duct inlet 213 and a duct outlet 214. The duct assembly 21 is rotatable about its first central axis O1, allowing the indoor unit of the air conditioner to switch between an upper air outlet state in cooling mode and a lower air outlet state in heating mode.

[0067] The heat exchanger 3 is in the shape of a straight plate and is located between the cross-flow fan 2 and the first air outlet 10 or the second air outlet 20.

[0068] In this design, the first direction x is the length direction of the housing 1. The housing 1 also includes a front plate 14 and a rear plate 13, which are connected between the top plate 11 and the bottom plate 12 and are spaced apart relative to each other along the second direction y, which is perpendicular to the first direction x and is the width direction of the housing 1. The top plate 11 and the bottom plate 12 are spaced apart relative to each other along a third direction z, which is perpendicular to the first direction x and the second direction y. The third direction z can be the height direction of the housing 1. The housing 1 also includes two side plates, which are connected between the top plate 11 and the bottom plate 12 and are spaced apart along the first direction x. The top plate 11, the bottom plate 12, the front plate 14, the rear plate 13, and the two side plates form an accommodating space.

[0069] Optionally, the top plate 11, bottom plate 12, front plate 14, rear plate 13 and two side plates may be straight plates, curved plates, a combination of straight plates and curved plates, or other shapes.

[0070] The cross-flow fan blade 22 extends along the first direction x, forming an elongated cylindrical shape. The top plate 11 has a first air outlet 10, which extends along the first direction x and its length continuously covers the length of the cross-flow fan blade 22. The bottom plate 12 has a second air outlet 20, which also extends along the first direction x and its length continuously covers the length of the cross-flow fan blade 22. This structure can increase the air volume. Optionally, the first air outlet 10 and the second air outlet 20 can also be intermittently arranged along the first direction x. Optionally, the shapes of the first air outlet 10 and the second air outlet 20 can be rectangular, elliptical, circular, or any other shape.

[0071] The air duct assembly 21 is rotatable around its central axis, and a drive assembly for rotating the air duct assembly 21 can be installed inside the housing 1. An air duct inlet 213 and an air duct outlet 214 are formed on the circumferential sidewall of the air duct assembly 21. The air duct inlet 213 allows airflow to enter the cross-flow fan blade 22, and the air duct outlet 214 allows airflow to exit from the cross-flow fan blade 22. The air duct inlet 213 and the air duct outlet 214 can be continuously or intermittently arranged in the first direction x.

[0072] The heat exchanger 3 is generally straight-plate shaped, i.e., in a straight-line configuration, with a flat rectangular structure and no bends. The heat exchanger 3 can extend along the first direction x. For example, to increase the heat exchange area, the length of the heat exchanger 3 can at least cover the length of the first air outlet 10 or the second air outlet 20. Furthermore, the heat exchanger 3 is located between the cross-flow fan 2 and the first air outlet 10, or between the cross-flow fan 2 and the second air outlet 20, in the third direction z (height direction). The heat exchanger 3 can be entirely located on one side of the cross-flow fan 2 in the third direction z, or, to save space in the indoor unit in the third direction z, the end of the heat exchanger 3 near the cross-flow fan 2 may partially overlap with the cross-flow fan 2. In the second direction y, the two ends of the heat exchanger 3 extend close to the front plate 14 and the rear plate 13, respectively, to maximize the width of the heat exchanger 3 and expand the heat exchange area.

[0073] Specifically, compared to an air conditioner indoor unit with only one air outlet and a deflector to change the direction of hot and cold air, this structure avoids forced airflow changes, reduces airflow impact losses, and optimizes cooling and heating effects.

[0074] In this embodiment, the indoor unit of the air conditioner has a rotatable air duct assembly housed within the casing 1. By rotating the air duct assembly, the airflow direction can be changed, enabling the indoor unit to switch between an upward airflow state in cooling mode and a downward airflow state in heating mode. This allows for upward blowing of cold air and downward blowing of hot air, thereby optimizing the cooling and heating effects and improving user comfort. By setting a first air outlet 10 for cooling mode on the top plate 11 and a second air outlet 20 for heating mode on the bottom plate 12, the height difference of the indoor unit casing can be fully utilized to increase the uniformity of the distribution of hot and cold air during indoor movement, solving the problems of rising hot air, small air delivery range, and poor effect in heating mode. By setting air outlets on the top plate 11 and bottom plate 12 respectively to achieve upward and downward airflow, there is no need to forcibly guide the airflow at the fan outlet, which reduces airflow impact loss and increases the air delivery range during cooling and heating, improving human comfort.

[0075] Specifically, by setting a first air outlet 10 on the top plate 11 for cooling mode, the cold air blows upward, avoiding direct airflow onto people. At the same time, by making full use of the height of the indoor unit, the air outlet height of the cold air is raised, allowing the cold air to be more evenly distributed in the room as it descends, circulating fully and creating a shower-like cooling effect, thereby improving the cooling effect and user comfort. By setting a second air outlet 20 on the bottom plate 12 for heating mode, the hot air blows downward, allowing the hot air to be directly delivered to the ground. This allows the hot air to be more evenly distributed in the room as it rises, circulating fully and creating a carpet-like heating effect, thereby improving the heating effect and user comfort.

[0076] Moreover, since the cross-flow fan blade 22 has a large length along the first direction x, it is not necessary to arrange multiple fans side by side in the first direction x, and the first air outlet 10 and the second air outlet 20 can be set with a large length in the first direction x, thereby improving the uniformity of air outlet along the first direction x.

[0077] In addition, heat exchanger 3 adopts a straight plate structure, which is simple in structure and easy to process compared with V-shaped or other irregular heat exchangers. It can improve production efficiency, reduce manufacturing costs, and facilitate installation during assembly.

[0078] In some embodiments, both the cross-flow fan 2 and the heat exchanger 3 extend along a first direction x, and the heat exchanger 3 is inclined so that the two ends of the heat exchanger 3 in its width direction are at different heights.

[0079] The heat exchanger 3 is inclined, meaning it is inclined relative to the plane (horizontal plane) formed by the first direction x and the second direction y. The two ends of the heat exchanger 3 in its width direction are located near the two ends of the rear plate 13 and the front plate 14.

[0080] Alternatively, heat exchanger 3 can also be installed horizontally.

[0081] This embodiment, by tilting the heat exchanger 3, increases the heat exchange area while keeping the dimension of the shell 1 along the second direction y constant. It also prevents airflow from directly passing through a portion of the heat exchanger 3 without sufficient heat exchange, and facilitates more even distribution of the airflow across the entire heat exchange surface. Furthermore, the tilted design allows the airflow to contact the surface of the heat exchanger 3 at a gentler angle, reducing impact losses and pressure drop. Additionally, the tilted design also facilitates the guiding and collection of condensate formed on the surface of the heat exchanger 3.

[0082] In some embodiments, such as Figures 1A to 1C , Figures 3A to 3C , Figures 5A to 5C , Figures 7A to 7C The tilt direction of the heat exchanger 3 is configured to face the airflow entering from the first air outlet 10 or the second air outlet 20 on the same side.

[0083] For example, such as Figures 1A to 1C , Figures 3A to 3C The heat exchanger 3 is located above the cross-flow fan 2. In the heating mode, the airflow enters the housing 1 from the first air outlet 10, and the upper surface of the heat exchanger 3 faces the airflow entering from the first air outlet 10.

[0084] For example, such as Figures 5A to 5C , Figures 7A to 7C The heat exchanger 3 is located below the cross-flow fan 2. In the cooling mode with the air outlet at the top, the airflow enters the housing 1 from the second air outlet 20, and the lower surface of the heat exchanger 3 faces the airflow entering from the second air outlet 20.

[0085] In this embodiment, the tilt direction of the heat exchanger 3 is aligned with the airflow entering from the first air outlet 10 or the second air outlet 20 on the same side. The angle between the incoming airflow and the surface of the heat exchanger 3 is relatively large, and the direction of the incoming airflow is not basically consistent with the extension direction of the surface of the heat exchanger 3. The airflow can maintain a sufficient speed to pass through the heat exchanger, thus achieving rapid heat exchange.

[0086] In some embodiments, such as Figures 1A to 1C , Figures 3A to 3C The housing 1 also includes a front plate 14, which is connected between the top plate 11 and the bottom plate 12. The heat exchanger 3 is located in the area above the cross-flow fan 2, and the lower side of the heat exchanger 3 is located close to the front plate 14.

[0087] Because the heat exchanger 3 is tilted, when the indoor unit of the air conditioner is installed on the wall, the distance between the top plate 11 and the ceiling is generally relatively small. The return air entering through the gap between the ceiling and the top plate 11 experiences significant resistance. If only one first air outlet 10 is provided along the second direction y on the top plate 11, the return air volume entering from the area near the front panel 14 of the first air outlet 10 is larger, while the air volume entering from the area near the rear panel 13 of the first air outlet 10 is smaller. Alternatively, if multiple first air outlets 10 are spaced apart along the second direction y on the top plate 11, the return air volume entering from the area near the front panel 14 is larger. The first air outlet 10 of plate 14 receives a larger volume of air, while the first air outlet 10 near the rear plate 13 receives a smaller volume of air. By positioning the lower end of the heat exchanger 3 close to the front plate 14, a larger height can be provided between the top plate 11 and the heat exchanger 3 in the area near the front plate 14. This allows sufficient space in the area near the front plate 14 to accommodate a larger volume of return air entering through the first air outlet 10, reducing the flow resistance of most of the return air near the front plate 14 after entry, facilitating airflow, and thus improving heat exchange efficiency.

[0088] In some embodiments, the indoor unit of the air conditioner also includes a water tray 4, which is disposed inside the housing 1 and located only at the bottom of the side end of the heat exchanger 3 where the height is low, for receiving condensate flowing down from the heat exchanger 3.

[0089] The water receiving tray 4 can extend along the first direction x to the same length as the heat exchanger 3, so as to prevent the condensate from the heat exchanger 3 from falling into the air duct.

[0090] In this embodiment, the water collection tray 4 is designed as a straight plate and is inclined, allowing condensate generated on the surface of the heat exchanger 3 to flow from the higher side to the lower side and fall into the water collection tray 4. Having the water collection tray 4 on only one side simplifies the design, saves space occupied by the tray 4 within the casing 1, reduces manufacturing difficulty, and improves assembly efficiency. In contrast, existing technologies, if designed as an inverted V-shaped heat exchanger, require water collection trays on both sides.

[0091] In some embodiments, such as Figures 2A to 2CAs shown, the water receiving tray 4 is located in the rear area inside the shell 1. The shell 1 also includes a rear plate 13, which is connected between the top plate 11 and the bottom plate 12. The water receiving tray 4 and the rear plate 13 are integrally formed.

[0092] In this embodiment, the heat exchanger 3 is a straight plate and is inclined. The side end near the rear plate 13 is lower than the side end near the front plate 14. In this way, the water receiving tray 4 is located in the rear area inside the shell 1. The water receiving tray 4 and the rear plate 13 can be integrally formed by injection molding or machining, which can eliminate the installation and fixing of the water receiving tray 4, improve assembly efficiency, and improve the fixing reliability of the water receiving tray 4.

[0093] Optionally, such as Figures 1A to 1C The water tray 4 is located in the front area inside the housing 1. The side end near the front panel 14 is lower than the side end near the rear panel 13. Since the front panel 14 is a separate component when the indoor unit of the air conditioner is assembled, the front panel 14 can only be closed after the cross-flow fan 2 and heat exchanger 3 are installed through the front opening of the housing. Therefore, the water tray 4 and the front panel 14 need to be set as independent components to meet the assembly requirements.

[0094] In some embodiments, such as Figures 1A to 1C As shown, the heat exchanger 3 is located above the cross-flow fan 2, and the condensate tray 4 is located above the middle height of the casing 1. "Above the middle height" includes both the middle height position and the upper height position. The condensate accumulated in the condensate tray 4 needs to be discharged through the drain pipe.

[0095] This embodiment takes into account the drainage requirements of the unit to have a certain inclination angle for the drain pipe. Therefore, there should be a certain height difference between the outlet of the water receiving pan 4 and the outdoor drain outlet. The water receiving pan 4 is set at a higher position to facilitate the smooth discharge of condensate through the drain pipe and to facilitate the routing of the drain pipe, thus saving the space occupied by the pipe routing.

[0096] In some embodiments, the cross-flow fan 2 extends along a first direction x, and the duct assembly 21 is provided with connecting rings at both ends of the duct inlet 213 and the duct outlet 214 along the first direction x.

[0097] Heat exchanger 3 is located above the cross-flow fan 2, and both ends of heat exchanger 3 abut against and are connected to the circumferential sidewalls of the two connecting rings, respectively; or

[0098] The heat exchanger 3 is located in the area below the cross-flow fan 2, and both ends of the heat exchanger 3 are suspended and connected to the circumferential sidewalls of the two connecting rings respectively.

[0099] The two connecting rings are coaxially spaced along the first direction x. The air duct assembly 21 also includes an air duct shell 211 and a volute tongue 212, which are connected between the two connecting rings. By setting connecting rings at both ends of the air duct shell 211 and the volute tongue 212, the two are connected, which facilitates the overall rotation of the air duct assembly 21, improves the overall rigidity of the air duct assembly 21, and makes the air duct inlet 213 and the air duct outlet 214 continuous in the first direction x, so as to achieve continuous and uniform airflow from the first air outlet 10 or the second air outlet 20 in the first direction x.

[0100] The heat exchanger 3 can be detachably connected to the connecting ring using fasteners such as screws.

[0101] In this embodiment, the heat exchanger 3 is located above the cross-flow fan 2. Both ends of the heat exchanger 3 can be abutted against the outer circumferential walls above the two connecting rings. The connecting rings support the heat exchanger 3, ensuring reliable force distribution. At the same time, the connection between the heat exchanger 3 and the connecting rings makes the installation of the heat exchanger 3 more stable.

[0102] Alternatively, the heat exchanger 3 can be located below the cross-flow fan 2, with both ends of the heat exchanger 3 suspended and connected to the circumferential sidewalls of the two connecting rings, still achieving a fixed installation of the heat exchanger 3. Furthermore, placing the heat exchanger 3 in the lower region prevents condensate from falling into the air duct and being blown out with the airflow. The bottom location also facilitates the removal, cleaning, and after-sales maintenance of the filter, prevents the risk of putting hands into the air duct, and improves the appearance by not directly opening the second air outlet 20 at the bottom, thus concealing the internal air duct structure. Additionally, when the indoor unit of the air conditioner is installed on a wall, the distance between the top plate 11 and the ceiling is generally relatively short. This results in significant resistance when return air enters through the gap between the ceiling and the top plate 11, or when exhaust air exits through the gap. Placing the heat exchanger 3 in the lower region reduces the airflow resistance at the first air outlet 10, making the upward airflow in cooling mode or the upward return airflow in heating mode smoother and improving heat exchange efficiency.

[0103] In some embodiments, the cross-flow fan blade 22 has a second central axis O2, which is parallel to the first central axis O1, wherein:

[0104] The second central axis O2 coincides with the first central axis O1, and the cross-flow fan blade 22 is configured not to rotate during the rotation of the duct assembly 21; or

[0105] The second central axis O2 is offset from the first central axis O1 by a preset distance, and the cross-flow fan blade 22 is configured to rotate along with the air duct assembly 21 during rotation.

[0106] The indoor unit of the air conditioner also includes a first drive assembly and a second drive assembly. The first drive assembly drives the air duct assembly 21 to rotate, switching between cooling and heating modes. For example, the first drive assembly may include a power component, gears, and an arc-shaped rack. The power component can be a motor or similar device, such as a stepper motor. The arc-shaped rack is located on the side wall of the connecting ring. The power component drives the arc-shaped rack through the gears, thereby causing the air duct assembly 21 to rotate as a whole. From a structural simplicity perspective, the drive assembly can be located at one end of the air duct assembly. From a rotational stability perspective, two sets of the first drive assembly can be provided, one at each end of the air duct assembly 21. The second drive assembly drives the cross-flow fan blades 22 to rotate, and can be, for example, a motor or similar device.

[0107] In this embodiment, when the cross-flow fan blade 22 and the air duct assembly 21 are coaxially arranged, the cross-flow fan blade 22 remains stationary when the air duct assembly 21 is rotated by the first drive assembly. There is no need to drive the second drive assembly and the cross-flow fan blade 22 to rotate together. This structure is simple and easy to implement.

[0108] When the cross-flow fan blade 22 is eccentrically positioned relative to the duct assembly 21, when the duct assembly 21 is rotated by the first drive component, the cross-flow fan blade 22 rotates along with the first central axis O1 of the duct assembly 21, and also carries the second drive component along with it. Otherwise, due to the eccentric design, the duct assembly 21 would interfere with the cross-flow fan blade 22 when it rotates. This eccentric design changes the gap distribution between the cross-flow fan blade 22 and the wall of the duct assembly 21, thereby guiding the airflow to flow more concentratedly towards the outlet side. This directional flow can reduce unnecessary turbulence in the duct and increase the effective air volume. Moreover, the eccentrically positioned cross-flow fan blade 22 can make the pressure change of the blades more stable when passing through different gaps, disperse the noise spectrum, and reduce the peak noise of a single frequency.

[0109] In some embodiments, the air duct assembly 21 includes an air duct shell 211 and a volute tongue 212 connected to each other. The air duct shell 211 and the volute tongue 212 are arranged circumferentially spaced along the air duct assembly 21 to form an air duct inlet 213 and an air duct outlet 214 on the circumferential sidewall of the air duct assembly 21.

[0110] The indoor unit of the air conditioner also includes: a first baffle 51 and a second baffle 52, which are disposed on the inner wall of the plate away from the heat exchanger 3 in the top plate 11 or the bottom plate 12. A flow guide channel is formed between the first baffle 51 and the second baffle 52, and the flow guide channel is connected to the air duct inlet 213 and the air duct outlet 214.

[0111] For example, such as Figures 1A to 1C , Figures 2A to 2C , Figures 3A to 3C and Figures 4A to 4C The heat exchanger 3 is located above the cross-flow fan 2, and the first baffle 51 and the second baffle 52 are located on the inner wall of the bottom plate 12, so as to... Figures 1A to 1C For example, in heating mode, the guide channel is connected to the air duct outlet 214 to guide the air from the cross-flow fan 2 out of the second air outlet 20; in cooling mode, the guide channel is connected to the air duct inlet 213 to guide the airflow entering from the second air outlet 20 into the air duct inlet 213 of the cross-flow fan 2.

[0112] For example, the first baffle 51 and the second baffle 52 can be flat plates or curved plates, and can be spaced apart along the second direction y.

[0113] This embodiment can form a flow guiding channel by setting a first baffle 51 and a second baffle 52 inside the housing 1, which is conducive to the directional guidance of airflow, thereby maintaining the air intake speed to better enter the cross-flow fan 2, or maintaining a certain air outlet speed to increase the air delivery distance.

[0114] In some embodiments, the housing 1 includes a rear plate 13, which is connected between the top plate 11 and the bottom plate 12. A first air guide plate 111 is rotatably provided at the first air outlet 10, and a second air guide plate 121 is rotatably provided at the second air outlet 20.

[0115] With the first air outlet 10 open, the first air guide plate 111 tilts upward relative to the first air outlet 10; with the second air outlet 20 open, the second air guide plate 121 tilts downward relative to the second air outlet 20.

[0116] To achieve the aforementioned tilting opening mechanism, the first air guide plate 111 and the second air guide plate 121 are hinged at one end near the rear plate 13 and rotatably mounted at the end near the front plate 14. Multiple first air guide plates 111 can be spaced apart along the second direction y, allowing at least one to be selectively opened according to airflow requirements; alternatively, only one first air guide plate 111 may be provided. Similarly, multiple second air guide plates 121 can be spaced apart along the second direction y, allowing at least one to be selectively opened according to airflow requirements; alternatively, only one second air guide plate 121 may be provided.

[0117] For example, when multiple first air guide plates 111 and multiple second air guide plates 121 are provided, all of the multiple air guide plates on the side near the heat exchanger 3 can be opened, and the multiple air guide plates on the side near the first baffle 51 and the second baffle 52 can be partially opened, so that the opened air outlets are aligned with the flow channel formed by the first baffle 51 and the second baffle 52.

[0118] For example, the first air guide plate 111 and the second air guide plate 121 can be elongated plate-like structures extending along the first direction x. The first air guide plate 111 and the second air guide plate 121 can be controlled to rotate by independent third drive components and fourth drive components, respectively.

[0119] This embodiment enables the first air guide plate 111 to open and guide air forward and upward when the indoor unit is in the upward air outlet state, and the second air guide plate 121 to open and guide air forward and downward when the indoor unit is in the downward air outlet state, i.e., guiding air along the second direction y towards the front panel 14. Therefore, in the upward air outlet state of the cooling mode, the upward air outlet allows the cooling air to travel further, achieving a longer airflow distance within the room after exiting. In this state, the cold airflow in the room flows and diffuses from top to bottom, avoiding direct airflow towards people, effectively improving human comfort. In the downward air outlet state of the heating mode, the heating airflow is directed towards the indoor space, allowing the hot air to travel a longer airflow distance within the room after exiting. In this state, the hot airflow in the room flows and diffuses from bottom to top, avoiding direct airflow towards people, effectively improving human comfort and making the indoor temperature more uniform.

[0120] Secondly, this disclosure also provides an air conditioning unit, including the indoor unit of the above embodiments.

[0121] This embodiment of the air conditioning unit allows switching between upper airflow mode in cooling mode and lower airflow mode in heating mode via the indoor unit. This optimizes cooling and heating performance, improves user comfort, and enhances energy efficiency. Furthermore, the air outlet of this type of air conditioning unit can achieve a larger length, improving airflow uniformity. In addition, the indoor unit uses a straight-plate structure, which is simple and easy to manufacture, improving production efficiency, reducing manufacturing costs, and facilitating installation. This significantly reduces the manufacturing and assembly costs of the air conditioning unit.

[0122] Eight different embodiments will be described below.

[0123] 1. In the first embodiment, as Figures 1A to 1C As shown, the heat exchanger 3 is located above the cross-flow fan 2, and the heat exchanger 3 is inclined, with the side end near the front plate 14 lower than the side end near the rear plate 13, and the water receiving tray 4 is only located at the bottom of the side end of the heat exchanger 3 near the front plate 14. The water receiving tray 4 and the front plate 14 are independent structures.

[0124] The top plate 11 is provided with three independently openable and closable first air guide plates 111, and the bottom plate 12 is provided with two independently openable and closable second air guide plates 121. The inner wall of the bottom plate 12 is provided with a first baffle 51 and a second baffle 52, respectively. The first baffle 51 is located between the two second air guide plates 121, and the second baffle 52 is located near the front plate 14. A third baffle 6 is provided at the middle height of the inner wall of the rear plate 13.

[0125] like Figure 1BAs shown, in heating mode, all three upper first air guide vanes 111 are open, and the lower second air guide vane 121 near the front panel 14 is open. Indoor return air enters the housing 1 through the first air outlet 10 and flows through the heat exchanger 3 for heat exchange. The heat-exchanged airflow enters the duct inlet 213 of the cross-flow fan 2, and then exits from the duct outlet 214 through the guide channel and out of the second air outlet 20. To accommodate the first baffle 51 and the second baffle 52, only the second air guide vane 121 near the front panel 14 is open. The first baffle 51 is aligned with one end of the duct housing 211, and the second baffle 52 is aligned with the volute tongue 212. At this time, the third baffle 6 is aligned with the other end of the duct housing 211 to prevent air leakage.

[0126] like Figure 1C As shown, in cooling mode, all three upper first air guide vanes 111 are open, and both lower second air guide vanes 121 are open. Indoor return air enters the housing 1 through the second air outlet 20 and then flows into the air duct inlet 213 of the cross-flow fan 2. It then flows out from the air duct outlet 214 and passes through the heat exchanger 3 for heat exchange. The heat-exchanged airflow is then discharged from the first air outlet 10. At this time, the third baffle 6 is inactive.

[0127] 2. In the second embodiment, as Figures 2A to 2C As shown, the heat exchanger 3 is located above the cross-flow fan 2, and the heat exchanger 3 is inclined, with the side end near the rear plate 13 lower than the side end near the front plate 14, and the water receiving tray 4 is only located at the bottom of the side end of the heat exchanger 3 near the rear plate 13. The water receiving tray 4 is integrally formed with the rear plate 13.

[0128] The top plate 11 is provided with three independently openable and closable first air guide plates 111, and the bottom plate 12 is provided with two independently openable and closable second air guide plates 121. The inner wall of the bottom plate 12 is provided with a first baffle 51 and a second baffle 52 respectively. The first baffle 51 is located between the two second air guide plates 121, and the second baffle 52 is located near the front plate 14 of the two second air guide plates 121.

[0129] like Figure 2B As shown, in heating mode, all three upper first air guide vanes 111 are open, and the lower second air guide vane 121 near the front panel 14 is open. Indoor return air enters the housing 1 through the first air outlet 10 and flows through the heat exchanger 3 for heat exchange. The heat-exchanged airflow enters the duct inlet 213 of the cross-flow fan 2, and then exits from the duct outlet 214 through the guide channel and out of the second air outlet 20. To accommodate the first baffle 51 and the second baffle 52, only the second air guide vane 121 near the front panel 14 is open. The first baffle 51 is aligned with one end of the duct housing 211, and the second baffle 52 is aligned with the volute tongue 212.

[0130] like Figure 2CAs shown, in cooling mode, all three upper first air guide plates 111 are open, and all two lower second air guide plates 121 are open. Indoor return air enters the housing 1 through the second air outlet 20 and enters the air duct inlet 213 of the cross-flow fan 2. Then it flows out from the air duct outlet 214 and flows through the heat exchanger 3 for heat exchange. The heat-exchanged airflow is discharged from the first air outlet 10.

[0131] 3. In the third embodiment, as follows: Figures 3A to 3C As shown, the difference between this embodiment and the first embodiment is that the left and right positions of the air duct shell 211 and the volute tongue 212 are changed in the second direction y.

[0132] The top plate 11 is provided with three independently openable and closable first air guide plates 111, and the bottom plate 12 is provided with three independently openable and closable second air guide plates 121. The inner wall of the bottom plate 12 is provided with a first baffle 51 and a second baffle 52 respectively. The first baffle 51 is located between the two second air guide plates 121 near the front plate 14, and the second baffle 52 is located between the second air guide plate 121 near the rear plate 13 and the rear plate 13.

[0133] like Figure 3B As shown, in heating mode, all three upper first air guide plates 111 are open, and the two lower second air guide plates 121 near the rear panel 13 are open. Indoor return air enters the housing 1 through the first air outlet 10 and flows through the heat exchanger 3 for heat exchange. The heat-exchanged airflow enters the duct inlet 213 of the cross-flow fan 2, and then exits from the duct outlet 214 through the guide channel and out of the second air outlet 20. To accommodate the first baffle 51 and the second baffle 52, only the second air guide plate 121 near the rear panel 13 is open. The first baffle 51 is aligned with one end of the duct housing 211, and the second baffle 52 is aligned with the volute tongue 212.

[0134] like Figure 3C As shown, in cooling mode, all three upper first air guide plates 111 are open, and all three lower second air guide plates 121 are open. Indoor return air enters the housing 1 through the second air outlet 20 and enters the air duct inlet 213 of the cross-flow fan 2. Then it flows out from the air duct outlet 214 and flows through the heat exchanger 3 for heat exchange. The heat-exchanged airflow is discharged from the first air outlet 10.

[0135] 4. In the fourth embodiment, as follows Figures 4A to 4C As shown, the heat exchanger 3 is located above the cross-flow fan 2, and the heat exchanger 3 is inclined, with the side end near the rear plate 13 lower than the side end near the front plate 14, and the water receiving tray 4 is only located at the bottom of the side end of the heat exchanger 3 near the rear plate 13. The water receiving tray 4 is integrally formed with the rear plate 13.

[0136] The top plate 11 is provided with three independently openable and closable first air guide plates 111, and the bottom plate 12 is provided with three independently openable and closable second air guide plates 121. The inner wall of the bottom plate 12 is provided with a first baffle 51 and a second baffle 52, respectively. The first baffle 51 is located between the second air guide plate 121 near the rear plate 13 and the rear plate 13, and the second baffle 52 is located at the hinge position of the second air guide plate 121 near the front plate 14. A third baffle 6 is provided at the middle height of the inner wall of the front plate 14, for example, it can be set horizontally.

[0137] like Figure 4B As shown, in heating mode, all three upper first air guide vanes 111 are open, and the two lower second air guide vanes 121 near the rear panel 13 are open. Indoor return air enters the housing 1 through the first air outlet 10 and flows through the heat exchanger 3 for heat exchange. The heat-exchanged airflow enters the duct inlet 213 of the cross-flow fan 2, and then exits from the duct outlet 214 through the guide channel and out of the second air outlet 20. To accommodate the first baffle 51 and the second baffle 52, only the two second air guide vanes 121 near the rear panel 13 are open. The first baffle 51 is aligned with one end of the duct housing 211, and the second baffle 52 is aligned with the volute tongue 212. At this time, the third baffle 6 is aligned with the other end of the duct housing 211 to prevent air leakage.

[0138] like Figure 4C As shown, in cooling mode, all three upper first air guide vanes 111 are open, and all three lower second air guide vanes 121 are open. Indoor return air enters the housing 1 through the second air outlet 20 and then flows into the air duct inlet 213 of the cross-flow fan 2. It then flows out from the air duct outlet 214 and passes through the heat exchanger 3 for heat exchange. The heat-exchanged airflow is then discharged from the first air outlet 10. At this time, the third baffle 6 is inactive.

[0139] 5. In the fifth embodiment, as follows Figures 5A to 5C As shown, the heat exchanger 3 is located in the area below the cross-flow fan 2, and the heat exchanger 3 is inclined, with the side end near the rear plate 13 lower than the side end near the front plate 14, and the water receiving tray 4 is only located at the bottom of the side end of the heat exchanger 3 near the rear plate 13. The water receiving tray 4 is integrally formed with the rear plate 13.

[0140] The top plate 11 is provided with three independently openable and closable first air guide plates 111, and the bottom plate 12 is provided with three independently openable and closable second air guide plates 121. The inner wall of the top plate 11 is provided with a first baffle 51 and a second baffle 52, respectively. The first baffle 51 is located between the first air guide plate 111 near the rear plate 13 and the rear plate 13, and the second baffle 52 is located at the hinge position near the first air guide plate 111 near the front plate 14. A third baffle 6 is provided at the middle height of the inner wall of the front plate 14. For example, it may include a horizontal section and an inclined section. The first end of the horizontal section is connected to the front plate 14, the first end of the inclined section is connected to the second end of the horizontal section, and the second section of the inclined section extends downward at an incline.

[0141] like Figure 5B As shown, in cooling mode, both first air guide plates 111 near the rear panel 13 are open, and the three second air guide plates 121 are open. Indoor return air enters the housing 1 through the second air outlet 20 and flows through the heat exchanger 3 for heat exchange. The heat-exchanged airflow enters the duct inlet 213 of the cross-flow fan 2, and then exits from the duct outlet 214 through the guide channel and out of the first air outlet 10. To accommodate the first baffle 51 and the second baffle 52, only the two second air guide plates 121 near the rear panel 13 are open. The first baffle 51 is aligned with one end of the duct housing 211, and the second baffle 52 is aligned with the volute tongue 212. At this time, the third baffle 6 is aligned with the other end of the duct housing 211 to prevent air leakage.

[0142] like Figure 5C As shown, in heating mode, all three upper first air guide vanes 111 and all three lower second air guide vanes 121 are open. Indoor return air enters the casing 1 through the first air outlet 10 and then flows into the air duct inlet 213 of the cross-flow fan 2. It then flows out from the air duct outlet 214 and passes through the heat exchanger 3 for heat exchange. The heat-exchanged airflow is discharged from the second air outlet 20. At this time, the third baffle 6 engages with the volute tongue 212 to prevent air leakage.

[0143] 6. In the sixth embodiment, as Figures 6A to 6C As shown, the heat exchanger 3 is located in the area below the cross-flow fan 2, and the heat exchanger 3 is inclined, with the side end near the front plate 14 lower than the side end near the rear plate 13, and the water receiving tray 4 is only located at the bottom of the side end of the heat exchanger 3 near the front plate 14. The water receiving tray 4 is set independently of the front plate 14.

[0144] The top plate 11 is provided with three independently openable and closable first air guide plates 111, and the bottom plate 12 is provided with three independently openable and closable second air guide plates 121. The inner wall of the top plate 11 is provided with a first baffle 51 and a second baffle 52, respectively. The first baffle 51 is located at the hinge position near the first air guide plate 111 of the front plate 14, and the second baffle 52 is located between the first air guide plate 111 and the rear plate 13 near the rear plate 13. A third baffle 6 is provided at the middle height of the inner wall of the front plate 14, for example, it can extend horizontally.

[0145] like Figure 6BAs shown, in cooling mode, both first air guide plates 111 near the rear panel 13 are open, and the three second air guide plates 121 are open. Indoor return air enters the housing 1 through the second air outlet 20 and flows through the heat exchanger 3 for heat exchange. The heat-exchanged airflow enters the duct inlet 213 of the cross-flow fan 2, and then exits from the duct outlet 214 through the guide channel and out of the first air outlet 10. To accommodate the first baffle 51 and the second baffle 52, only the two second air guide plates 121 near the rear panel 13 are open. The first baffle 51 is aligned with one end of the duct housing 211, and the second baffle 52 is aligned with the volute tongue 212. At this time, the third baffle 6 is aligned with the other end of the duct housing 211 to prevent air leakage.

[0146] like Figure 6C As shown, in heating mode, all three upper first air guide vanes 111 and all three lower second air guide vanes 121 are open. Indoor return air enters the housing 1 through the first air outlet 10 and then flows into the air duct inlet 213 of the cross-flow fan 2. It then flows out from the air duct outlet 214 and passes through the heat exchanger 3 for heat exchange. The heat-exchanged airflow is discharged from the second air outlet 20. At this time, the third baffle 6 is inactive.

[0147] 7. In the seventh embodiment, as follows Figures 7A to 7C As shown, the difference between this embodiment and the fifth embodiment is that the left and right positions of the air duct shell 211 and the volute tongue 212 are changed in the second direction y.

[0148] The top plate 11 is provided with two independently openable and closable first air guide plates 111, and the bottom plate 12 is provided with three independently openable and closable second air guide plates 121. The inner wall of the top plate 11 is provided with a first baffle 51 and a second baffle 52, respectively. The first baffle 51 is located between the two first air guide plates 111, and the second baffle 52 is located between the first air guide plates 111 and the front plate 14. The inner wall of the rear plate 13 is provided with a third baffle 6 and a fourth baffle 7 at a mid-height position. Both the third baffle 6 and the fourth baffle 7 can be tilted at different angles, with the third baffle 6 located above the fourth baffle 7.

[0149] like Figure 7B As shown, in cooling mode, the two first air guide vanes 111 near the front panel 14 are open, and the three second air guide vanes 121 are open. Indoor return air enters the housing 1 through the second air outlet 20 and flows through the heat exchanger 3 for heat exchange. The heat-exchanged airflow enters the duct inlet 213 of the cross-flow fan 2, and then exits from the duct outlet 214 through the guide channel and out of the first air outlet 10. To accommodate the first baffle 51 and the second baffle 52, only the first air guide vane 111 near the front panel 14 is open. The first baffle 51 is aligned with one end of the duct housing 211, and the second baffle 52 is aligned with the volute tongue 212. At this time, the third baffle 6 is aligned with the other end of the duct housing 211 to prevent air leakage, and the fourth baffle 7 is inactive.

[0150] like Figure 7C As shown, in heating mode, both upper first air guide vanes 111 are open, and all three lower second air guide vanes 121 are open. Indoor return air enters the casing 1 through the first air outlet 10 and then enters the air duct inlet 213 of the cross-flow fan 2. It then flows out from the air duct outlet 214 and passes through the heat exchanger 3 for heat exchange. The heat-exchanged airflow is discharged from the second air outlet 20. At this time, the fourth baffle 7 engages with the volute tongue 212 to prevent air leakage, and the third baffle 6 is inactive.

[0151] 8. In the eighth embodiment, as Figures 8A to 8C As shown, the heat exchanger 3 is located in the area below the cross-flow fan 2, and the heat exchanger 3 is inclined, with the side end near the front plate 14 lower than the side end near the rear plate 13, and the water receiving tray 4 is only located at the bottom of the side end of the heat exchanger 3 near the front plate 14. The water receiving tray 4 is set independently of the front plate 14.

[0152] The top plate 11 is provided with two independently openable and closable first air guide plates 111, and the bottom plate 12 is provided with three independently openable and closable second air guide plates 121. The inner wall of the top plate 11 is provided with a first baffle 51 and a second baffle 52, respectively. The first baffle 51 is located between the two first air guide plates 111, and the second baffle 52 is located between the first air guide plates 111 and the front plate 14. The inner wall of the rear plate 13 is provided with a third baffle 6 and a fourth baffle 7 at a mid-height position. The third baffle 6 can be horizontally positioned, and the fourth baffle 7 includes a horizontal section and an inclined section. The first end of the horizontal section is connected to the rear plate 13, and the first end of the inclined section is connected to the second end of the horizontal section. The second end of the inclined section extends downwards at an angle. The third baffle 6 is located above the fourth baffle 7.

[0153] like Figure 8B As shown, in cooling mode, the two first air guide vanes 111 near the front panel 14 are open, and the three second air guide vanes 121 are open. Indoor return air enters the housing 1 through the second air outlet 20 and flows through the heat exchanger 3 for heat exchange. The heat-exchanged airflow enters the duct inlet 213 of the cross-flow fan 2, and then exits from the duct outlet 214 through the guide channel and out of the first air outlet 10. To accommodate the first baffle 51 and the second baffle 52, only the first air guide vane 111 near the front panel 14 is open. The first baffle 51 is aligned with one end of the duct housing 211, and the second baffle 52 is aligned with the volute tongue 212. At this time, the third baffle 6 is aligned with the other end of the duct housing 211 to prevent air leakage, and the fourth baffle 7 is inactive.

[0154] like Figure 8CAs shown, in heating mode, both upper first air guide vanes 111 are open, and all three lower second air guide vanes 121 are open. Indoor return air enters the casing 1 through the first air outlet 10 and then enters the air duct inlet 213 of the cross-flow fan 2. It then flows out from the air duct outlet 214 and passes through the heat exchanger 3 for heat exchange. The heat-exchanged airflow is discharged from the second air outlet 20. At this time, the fourth baffle 7 engages with the volute tongue 212 to prevent air leakage, and the third baffle 6 is inactive.

[0155] The present disclosure provides a detailed description of an indoor air conditioning unit and an air conditioning system. Specific embodiments have been used to illustrate the principles and implementation methods of the present disclosure. These embodiments are merely illustrative and are intended to aid in understanding the method and core concepts of the present disclosure. It should be noted that those skilled in the art can make various improvements and modifications to the present disclosure without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of this disclosure.

Claims

1. An air conditioner indoor unit characterized by comprising: include: The housing (1) includes a top plate (11) and a bottom plate (12). The top plate (11) is provided with a first air outlet (10) for air outlet in cooling mode, and the bottom plate (12) is provided with a second air outlet (20) for air outlet in heating mode. A cross-flow fan (2) is disposed within the housing (1) and includes a duct assembly (21) and cross-flow fan blades (22) disposed within the duct assembly (21). The circumferential sidewall of the duct assembly (21) forms a duct inlet (213) and a duct outlet (214). The duct assembly (21) is rotatable about its own first central axis (O1) to allow the indoor unit of the air conditioner to switch between the upper air outlet state in the cooling mode and the lower air outlet state in the heating mode. The heat exchanger (3) is in the shape of a straight plate and is located between the cross-flow fan (2) and the first air outlet (10) or the second air outlet (20). 2.The indoor unit of the air conditioner according to claim 1, characterized by, Both the cross-flow fan (2) and the heat exchanger (3) extend along the first direction (x), and the heat exchanger (3) is inclined so that the two ends of the heat exchanger (3) in its width direction are at different heights. 3.The indoor unit of the air conditioner according to claim 2, characterized by, The heat exchanger (3) is tilted to face the airflow entering from the first air outlet (10) or the second air outlet (20) on the same side. 4.The indoor unit of the air conditioner according to claim 2, characterized by, The housing (1) also includes a front plate (14), which is connected between the top plate (11) and the bottom plate (12). The heat exchanger (3) is located in the area above the cross-flow fan (2), and the lower side of the heat exchanger (3) is set close to the front plate (14). 5.The indoor unit of the air conditioner according to claim 2, characterized in that, It also includes a water receiving tray (4), which is located inside the housing (1) and only at the bottom of the lower side of the heat exchanger (3). 6.The indoor unit of the air conditioner according to claim 5, characterized in that, The water receiving tray (4) is located in the rear area inside the housing (1). The housing (1) also includes a rear plate (13), which is connected between the top plate (11) and the bottom plate (12). The water receiving tray (4) and the rear plate (13) are integrally formed. 7.The indoor unit of the air conditioner according to claim 5, characterized in that, The heat exchanger (3) is located above the cross-flow fan (2), and the water receiving tray (4) is located above the middle height of the shell (1).

8. The indoor unit of the air conditioner according to claim 1, characterized in that, The cross-flow fan (2) extends along the first direction (x), and the duct assembly (21) is provided with connecting rings at both ends of the duct inlet (213) and the duct outlet (214) along the first direction (x); The heat exchanger (3) is located above the cross-flow fan (2), and both ends of the heat exchanger (3) abut and connect to the circumferential sidewalls of the two connecting rings, respectively; or The heat exchanger (3) is located in the area below the cross-flow fan (2), and both ends of the heat exchanger (3) are suspended and connected to the circumferential sidewalls of the two connecting rings. 9.The indoor unit of the air conditioner according to claim 1, characterized by, The cross-flow fan blade (22) has a second central axis (O2), which is parallel to the first central axis (O1), wherein: The second central axis (O2) coincides with the first central axis (O1), and the cross-flow fan blade (22) is configured not to rotate during the rotation of the duct assembly (21); or The second central axis (O2) is offset from the first central axis (O1) by a predetermined distance, and the cross-flow fan blade (22) is configured to rotate along with the air duct assembly (21) during rotation.

10. The air conditioning indoor unit according to any one of claims 1 to 9, characterized by The air duct assembly (21) includes an interconnected air duct shell (211) and a volute tongue (212), the air duct shell (211) and the volute tongue (212) being arranged circumferentially spaced along the air duct assembly (21) to form the air duct inlet (213) and the air duct outlet (214) on the circumferential sidewall of the air duct assembly (21); The indoor unit of the air conditioner also includes: a first baffle (51) and a second baffle (52), which are disposed on the inner wall of the plate away from the heat exchanger (3) in the top plate (11) or the bottom plate (12), and a flow guiding channel is formed between the first baffle (51) and the second baffle (52), and the flow guiding channel is connected to the air duct inlet (213) and the air duct outlet (214).

11. The air conditioning indoor unit according to any one of claims 1 to 9, characterized by The housing (1) includes a rear plate (13), which is connected between the top plate (11) and the bottom plate (12). A first air guide plate (111) is rotatably provided at the first air outlet (10), and a second air guide plate (121) is rotatably provided at the second air outlet (20). When the first air outlet (10) is open, the first air guide plate (111) is tilted upward relative to the first air outlet (10); when the second air outlet (20) is open, the second air guide plate (121) is tilted downward relative to the second air outlet (20).

12. An air conditioning unit characterized by, Includes the air conditioning indoor unit as described in any one of claims 1 to 11.

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