Cross-flow fan wind direction reversing structure and air conditioner

Abstract

The cross-flow fan wind direction reversing structure comprises a structure shell, the side face of the structure shell is provided with a shell side air opening, and the bottom face of the structure shell is provided with a shell lower air opening; the three-way special-shaped air duct is arranged in the structural shell, cross-flow fan blades of the cross-flow fan are arranged on the inner side of the three-way special-shaped air duct, and the three-way special-shaped air duct is provided with two symmetrically-arranged air duct air inlets and an air duct air outlet formed between the two air duct air inlets; under the refrigeration working condition, one air duct air inlet is communicated with the lower air opening of the shell, and the air duct air outlet is communicated with the side air opening of the shell; in the heating working condition, the three-way special-shaped air duct is rotated so that the other air duct air inlet can be communicated with the shell side air opening, and the air duct air outlet can be communicated with the shell lower air opening. A human body activity area at the lower part of the room is difficult to effectively cover, so that the indoor temperature field is not uniformly distributed, and the upper part is hot and the lower part is cold.

Description

Technical Field

[0001] This application relates to the field of heating, ventilation and air conditioning technology, and in particular to a cross-flow fan air direction reversing structure and air conditioning. Background Technology

[0002] Most existing indoor air conditioning units are installed above the wall or in the ceiling, and generally adopt a side-discharge design. When heating, because hot air is less dense than cold air, the side-discharged airflow tends to rise directly and accumulate in the upper part of the room, making it difficult to effectively cover the human activity area in the lower part of the room. This results in an uneven distribution of indoor temperature, creating the problem of "hot at the top and cold at the bottom". Summary of the Invention

[0003] This application provides a cross-flow fan air direction reversing structure and air conditioner, which can solve the problem that the side-discharge airflow of the existing air conditioner indoor unit tends to rise directly and accumulate in the upper space of the room, making it difficult to effectively cover the human activity area located in the lower part of the room, thus causing uneven indoor temperature field distribution and forming the problem of "hot at the top and cold at the bottom".

[0004] In a first aspect, embodiments of this application provide a cross-flow fan airflow reversing structure, including: The structural shell has side air vents on its sides and bottom air vents on its bottom. A three-way irregular-shaped air duct is located inside the outer shell of the structure, and its inner side is used to install the cross-flow fan blades. It has two symmetrically arranged air duct inlets and an air duct outlet located between the two air duct inlets. In cooling mode, one of the air duct inlets is connected to the lower air outlet of the outer casing, and the air duct outlet is connected to the side air outlet of the outer casing; in heating mode, the three-way irregular air duct is rotated so that the other air duct inlet is connected to the side air outlet of the outer casing, and the air duct outlet is connected to the lower air outlet of the outer casing.

[0005] In some embodiments, the three-way irregular air duct includes: Duct housing; An air inlet baffle is located inside the air duct housing, and its coverage area is larger than the diameter of the cross-flow fan blade. The upper air outlet baffle is located inside the air duct housing and opposite the air inlet baffle. Its coverage area is smaller than the diameter of the cross-flow fan blade. The lower air outlet baffle is located inside the air duct housing and is situated on the opposite side of the air inlet baffle and the upper air outlet baffle. Its coverage area is smaller than the diameter of the cross-flow fan blade. The air inlet baffle, the upper air outlet baffle, and the lower air outlet baffle form two air duct inlets, and the air outlet baffle, the upper air outlet baffle, and the lower air outlet baffle form the air duct outlet.

[0006] In some embodiments, the width of the air inlet of the air duct is greater than the width of the air outlet of the air duct, and the air inlet of the air duct is gradually widened into a trumpet shape from the inside to the outside, while the air outlet of the air duct is arc-shaped.

[0007] In some embodiments, the air inlet baffle includes two arc-shaped protrusions and an arc-shaped recess between the two arc-shaped protrusions, the arc-shaped recess being used to accommodate the cross-flow fan blade.

[0008] In some embodiments, the cross-flow fan air direction reversing structure further includes an air duct rotation mechanism, which is connected to the three-way irregular air duct and is used to drive the three-way irregular air duct to rotate relative to the structure shell.

[0009] In some embodiments, the duct rotation mechanism includes: The air duct rotation motor is located inside the outer casing of the structure. Intersecting limiters are located at the output end of the air duct rotating motor; Intersecting grooves are provided on the end face of the air duct housing and are connected to the intersecting limiting mechanism.

[0010] In some embodiments, the duct rotation mechanism includes: The air duct rotation motor is located inside the outer casing of the structure. A duct support shaft is located on the end face of the duct housing and is connected to the output end of the duct rotation motor. A duct support plate is disposed inside the outer shell of the structure, and a support shaft groove is provided thereon, the support shaft groove being used to accommodate the duct support shaft.

[0011] In some embodiments, the duct rotation motor is a direct drive motor.

[0012] In some embodiments, the structural housing includes: The outer casing has a side air vent on its side and a bottom air vent on its bottom surface. A cross-flow motor housing cavity is located at one end of the outer shell and is used to house the cross-flow motor of the cross-flow fan; The air duct motor receiving cavity is located on the outer shell at one end away from the cross-flow motor receiving cavity, and is used to house the air duct rotating motor.

[0013] Secondly, embodiments of this application provide an air conditioner, including a cross-flow fan airflow reversing structure as described in any embodiment of the first aspect.

[0014] The technical solutions provided in this application have the following advantages compared with the prior art: The cross-flow fan airflow reversing structure and air conditioner provided in this application embodiment, through the rotation and switching of the three-way irregular air duct, in the cooling mode, one of the air duct inlets is connected to the lower air outlet of the outer casing, and the air duct outlet is connected to the side air outlet of the outer casing. The airflow enters through the lower air outlet of the outer casing and exits through the side air outlet of the outer casing, which conforms to the airflow characteristics of cold air sinking, ensuring that the side air outlet cools down quickly and diffuses evenly during cooling. In the heating mode, the three-way irregular air duct is rotated so that the other air duct inlet is connected to the side air outlet of the outer casing and the air duct outlet is connected to the lower air outlet of the outer casing. The airflow enters through the side air outlet of the outer casing and exits through the lower air outlet of the outer casing, so that the hot airflow is directly delivered downward to the human activity area in the lower part of the room. This can solve the problem that the side air outlet airflow of the existing air conditioner indoor unit tends to rise and accumulate in the upper space of the room, making it difficult to effectively cover the human activity area in the lower part of the room, thus causing uneven indoor temperature distribution and forming the problem of "hot above and cold below". Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0018] Figure 1 A cross-sectional view of the cooling state (cooling condition) of the cross-flow fan airflow reversing structure provided in an embodiment of this application; Figure 2 A perspective view of the cooling state (cooling condition) of a cross-flow fan airflow reversing structure provided in an embodiment of this application; Figure 3 A cross-sectional view of the cross-flow fan airflow reversing structure provided in an embodiment of this application under heating conditions (heating operation). Figure 4 A perspective view of the heating state (heating condition) of the cross-flow fan airflow reversing structure provided in an embodiment of this application; Figure 5 This is a front cross-sectional view of a cross-flow fan airflow reversing structure provided in an embodiment of this application; Figure 6 A perspective view of a three-way irregular air duct provided in an embodiment of this application; Figure 7 A perspective view of the air duct rotating motor and the crisscrossing limiting assembly provided in an embodiment of this application; Figure 8 A perspective view of the structural shell provided in an embodiment of this application; Figure 9 This is a front cross-sectional view of the structural shell provided in an embodiment of this application; Figure 10 An exploded view of the cross-flow fan airflow reversal structure provided in an embodiment of this application.

[0019] Figure label: 10. Structural shell; 110. Side air vents on the outer casing; 120. Lower air vent of the outer casing; 130. Axial flow motor housing cavity; 140. Air duct motor housing cavity; 150. Outer shell; 20. Three-way irregular air duct; 210. Air inlet of the air duct; 220. Air duct outlet; 230. Air inlet baffle; 240. Top air outlet deflector; 250. Lower air outlet deflector; 260. Duct housing; 30. Duct rotation mechanism; 310. Duct rotation motor; 320. Intersecting limit switches; 410. Axial current motor; 420. Crossflow fan blades. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0022] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0023] Most existing indoor air conditioning units are installed above the wall or in the ceiling, and generally adopt a side-discharge design. When heating, because hot air is less dense than cold air, the side-discharged airflow tends to rise directly and accumulate in the upper part of the room, making it difficult to effectively cover the human activity area in the lower part of the room. This results in an uneven distribution of indoor temperature, creating a "hot above, cold below" phenomenon. This problem is particularly noticeable for users who are sensitive to cold and whose hands and feet are prone to getting cold, which seriously reduces the heating experience.

[0024] To address the drawback of unidirectional airflow, existing technologies have developed air conditioning products with switchable airflow directions. These technologies primarily fall into two categories: one involves rotating the centrifugal fan's volute to change the direction of the air outlet; the other involves adding a dual-mode air guide plate for side and bottom airflow, using the angle adjustment of the guide plate to achieve airflow reversal. However, these solutions have significant limitations: while centrifugal fans possess strong static pressure output capabilities, their operation is accompanied by high noise levels and poor comfort. Furthermore, the volute's structural design results in a large overall size for the indoor unit, requiring ample installation space and making it unsuitable for small apartments or scenarios with stringent noise reduction requirements.

[0025] Firstly, such as Figure 1-10 As shown, to address the aforementioned technical problems, this application provides a cross-flow fan airflow reversing structure, including: The structural shell 10 has a side air vent 110 on its side and a bottom air vent 120 on its bottom surface. The three-way irregular air duct 20 is located inside the structural shell 10, and its inner side is used to install the cross-flow fan blades 420. It has two symmetrically arranged air duct inlets 210 and an air duct outlet 220 located between the two air duct inlets 210. In cooling mode, the air inlet 210 of one air duct is connected to the lower air outlet 120 of the outer casing, and the air outlet 220 of the air duct is connected to the side air outlet 110 of the outer casing; in heating mode, the three-way irregular air duct 20 is rotated so that the air inlet 210 of the other air duct is connected to the side air outlet 110 of the outer casing, and the air outlet 220 of the air duct is connected to the lower air outlet 120 of the outer casing.

[0026] It should be noted that, as Figure 1 , 2 As shown in Figures 3, 4, 5, and 6, the cross-flow fan airflow reversing structure provided in this application embodiment switches the airflow direction through the rotation of the three-way irregular air duct 20. This allows the airflow to enter through the lower air vent 120 of the outer casing and exit through the side air vent 110 of the outer casing during cooling, which conforms to the airflow characteristics of cold air sinking. This ensures that the side air outlet cools down quickly and diffuses evenly during cooling. During heating, by rotating the three-way irregular air duct 20 (e.g., rotating it 90° clockwise), the airflow is switched to enter through the side air vent 110 of the outer casing and exit through the lower air vent 120 of the outer casing. This allows the hot airflow to be directly delivered downwards to the human activity area at the bottom of the room. This solves the problem of hot air rising and uneven temperature distribution when the traditional side-discharge air conditioner is heating, and effectively eliminates the drawback of the "hot above, cold below" temperature difference.

[0027] It should be noted that, compared to the existing centrifugal fan volute rotation / dual air guide plate reversing scheme, this structure is compatible with cross-flow fans and does not rely on the static pressure output of centrifugal fans. On the one hand, the operating noise of cross-flow fans is much lower than that of centrifugal fans, greatly improving user comfort. On the other hand, through the structural design of cross-flow fans and three-way irregular air duct 20, the redundant space required for volute rotation is avoided, effectively reducing the structural volume and lowering the requirements for installation space, making it suitable for various installation scenarios such as small apartments, ceilings, and wall mounting.

[0028] In some embodiments, the three-way irregular air duct 20 includes: Duct housing 260; The air inlet baffle 230 is located inside the air duct shell 260, and its coverage area is larger than the diameter of the cross-flow fan blade 420. The upper air outlet baffle 240 is located inside the air duct housing 260 and opposite the air inlet baffle 230. Its coverage area is smaller than the diameter of the cross-flow fan blade 420. The lower air outlet baffle 250 is located inside the air duct housing 260 and is located on the opposite side of the air inlet baffle 230 and the upper air outlet baffle 240. Its coverage area is smaller than the diameter of the cross-flow fan blade 420. Among them, the air inlet 230 forms an air inlet 210 between the upper air outlet 240 and the lower air outlet 250, and the air outlet 220 forms an air outlet 220 between the upper air outlet 240 and the lower air outlet 250.

[0029] It should be noted that by making the coverage area of ​​the inlet baffle 230 larger than the diameter of the cross-flow fan blade 420, the area of ​​the fan blade that is not inlet can be completely blocked, preventing airflow from leaking in from non-target directions. This ensures that under cooling / heating conditions, the airflow only enters stably from the corresponding air duct inlet 210, improving the directionality of the airflow. By making the coverage area of ​​the upper outlet baffle 240 and the lower outlet baffle 250 smaller than the diameter of the fan blade, sufficient air outlet space is reserved for the air duct outlet 220, and the airflow is also guided and constrained, making the air outlet direction more concentrated (the side air outlet is more uniform during cooling, and the lower air outlet is more accurately delivered to the lower area during heating).

[0030] It should be noted that the two air inlets 210 are formed by the air inlet baffle 230, the upper air outlet baffle 240, and the lower air outlet baffle 250. The symmetrical layout design allows the new air inlet 210 to quickly and accurately connect with the side air outlet 110 and the lower air outlet 120 of the outer shell after the three-way irregular air duct 20 is rotated, without the need for additional adjustment of the baffle structure. This simplifies the reversing operation and ensures the air duct sealing and airflow stability under different working conditions.

[0031] In some embodiments, the width of the air inlet 210 is greater than the width of the air outlet 220, and the air inlet 210 is gradually widened into a trumpet shape from the inside to the outside, while the air outlet 220 is arc-shaped.

[0032] It should be noted that by making the width of the air inlet 210 of the air duct greater than the width of the air outlet 220 of the air duct, and by combining it with its gradually expanding shape, the air intake area can be increased and the air intake velocity can be reduced, allowing the airflow to enter the air duct more smoothly (avoiding air intake congestion); by making the air inlet 210 of the air duct into a trumpet shape, the airflow can be guided to concentrate towards the cross-flow fan blade 420, reducing the energy loss of the airflow in the air intake section and improving the air delivery efficiency of the fan blade; by making the air outlet 220 of the air duct into an arc shape, it can match the airflow trajectory, avoid the airflow impact and turbulence caused by right angle / acute angle structures, and make the airflow smoother when it flows out of the air duct, further reducing wind resistance and ensuring the continuity and stability of the air outlet.

[0033] It should be noted that the arc-shaped and relatively narrow design of the air outlet 220 allows for more concentrated airflow. Combined with the design of the upper air outlet baffle 240 and the lower air outlet baffle 250 mentioned above, the airflow can be more evenly diffused to the side of the room when the air is being discharged from the side in cooling mode; and when the air is being discharged from the side in heating mode, the airflow can be more accurately delivered downwards to the human body area, improving the effectiveness of temperature coverage.

[0034] In some embodiments, the air inlet baffle 230 includes two arc-shaped protrusions and an arc-shaped recess between the two arc-shaped protrusions, the arc-shaped recess being used to accommodate the cross-flow fan blade 420.

[0035] It should be noted that, as Figure 1 , 3 As shown, by adapting the arc-shaped concave shape to the cylindrical shape of the cross-flow fan blade 420, the incoming airflow can flow more closely to the surface of the fan blade, reducing airflow leakage in the gap between the fan blade and the baffle, improving the driving efficiency of the fan blade for airflow, and ensuring effective airflow output. The design of the two arc-shaped protrusions can guide the incoming airflow to concentrate in the arc-shaped concave shape (fan blade area), avoiding the airflow from dispersing and forming turbulence in the air duct. At the same time, the arc-shaped structure conforms to the natural flow trajectory of the airflow, reducing the frictional resistance between the airflow and the baffle, and reducing energy loss during the air delivery process.

[0036] It should be noted that by making the arc-shaped recess fit tightly with the cross-flow fan blade 420, and with the air inlet baffle 230 covering an area larger than the fan blade diameter, the non-air inlet side of the fan blade can be effectively sealed off, preventing airflow from entering through the non-target air duct inlet 210 when switching between cooling and heating modes, thus ensuring the accuracy of airflow direction under different operating conditions.

[0037] In some embodiments, the cross-flow fan air direction reversing structure further includes a duct rotation mechanism 30, which is connected to a three-way irregular air duct 20 and is used to drive the three-way irregular air duct 20 to rotate relative to the structural shell 10.

[0038] It should be noted that the linkage design between the air duct rotation mechanism 30 and the three-way irregular air duct 20 enables intelligent switching of airflow direction. By driving the three-way irregular air duct 20 to rotate relative to the structural shell 10, the connection relationship between the air duct inlet 210, the air duct outlet 220 and the side air outlet 110 and the bottom air outlet 120 of the shell can be precisely changed. When cooling, side air outlet is achieved, and when heating, bottom air outlet is achieved. This solves the pain point of traditional air conditioners that are "efficient in cooling but uneven in heating" from a structural perspective, ensuring the best air delivery effect under dual conditions. Moreover, the air duct rotation mechanism 30 can be automatically reversed by electronic control commands, without the need for manual adjustment of the air guide plate or disassembly of the air duct. Users only need to switch the air conditioner operating mode to achieve synchronous switching of airflow direction, simplifying the operation process and improving the convenience of use.

[0039] In some embodiments, the duct rotation mechanism 30 includes: The air duct rotation motor 310 is located inside the structural housing 10; The crisscrossing limit switch 320 is located at the output end of the air duct rotation motor 310; Intersecting grooves are provided on the end face of the air duct housing 260 and are connected to the intersecting limiters 320.

[0040] It should be noted that, as Figure 7 , 10 As shown, by making the crisscross limiter 320 at the output end of the duct rotation motor 310 and the crisscross groove on the end face of the duct housing 260 form a precise fit, circumferential slippage and radial movement during transmission can be eliminated. This ensures that the three-way irregular duct 20 can rotate to the preset angle in one go when switching between cooling and heating modes, achieving precise docking of the duct inlet 210, outlet and the side air outlet 110 and bottom air outlet 120 of the housing, avoiding air leakage or incomplete reversal that could lead to a decrease in air delivery efficiency.

[0041] It should be noted that the "limiting groove" interlocking structure is directly driven by the duct rotation motor 310, eliminating the need for intermediate deceleration or redundant transmission components. This results in a shorter power transmission path and lower losses. After the operating condition switching command is issued, the duct rotation action can be completed quickly, reducing the waiting time for switching between cooling and heating modes and improving the user experience. Furthermore, compared to traditional positioning methods such as single keys and pins, the crisscrossing limiting groove structure has a larger contact area and more even force distribution, effectively resisting the vibration and airflow impact generated during the operation of the cross-flow fan. This prevents angular deviation of the duct during operation and ensures the structural stability of long-term operation.

[0042] In some embodiments, the duct rotation mechanism 30 includes: The air duct rotation motor 310 is located inside the structural housing 10; The air duct support shaft is located on the end face of the air duct housing 260 and is connected to the output end of the air duct rotation motor 310; The air duct support plate is located inside the structural shell 10 and has a support shaft groove for accommodating the air duct support shaft.

[0043] It should be noted that the duct support shaft is coaxially connected to the output end of the duct rotation motor 310. With the support shaft groove on the duct support plate for radial limiting of the support shaft, radial movement and circumferential slippage during transmission can be eliminated. This ensures that the three-way irregular duct 20 rotates to the preset angle in one go when switching between cooling and heating modes, achieving precise docking of the duct inlet 210, duct outlet 220 with the side air outlet 110 and bottom air outlet 120 of the outer casing, thus avoiding airflow leakage or reduced air delivery efficiency.

[0044] It should be noted that there can be two duct support shafts, which are respectively located on both sides of the duct housing 260. Correspondingly, there are also two duct support plates, with the two duct support shafts located in the support shaft grooves. This forms a symmetrical bidirectional support structure, which can evenly distribute the gravity and rotational stress of the three-way irregular duct 20 to the support points on both sides, avoiding the duct tilting and jamming problems caused by torque imbalance when supported on one side, and ensuring that the three-way irregular duct 20 rotates smoothly. Moreover, the bidirectional support structure greatly improves the connection rigidity between the duct housing 260 and the duct rotation mechanism 30, which can effectively resist the high-frequency vibration generated by the cross-flow fan during operation and the instantaneous load caused by airflow impact, preventing the duct from loosening or shifting during operation, and ensuring that the duct inlet 210, duct outlet 220 and the outer shell side outlet 110 and outer shell bottom outlet 120 can still be accurately connected after long-term use.

[0045] In some embodiments, the duct rotation motor 310 is a direct drive motor.

[0046] It should be noted that the direct drive motor does not require intermediate transmission components such as gearboxes and pulleys, and can directly drive the duct support shaft to rotate, eliminating the mechanical friction loss and energy transmission loss in traditional indirect transmission, ensuring that the rotation efficiency of the three-way irregular duct 20 reaches the optimal level; moreover, the direct drive motor has the characteristics of fast start-up response and strong speed controllability. After receiving the cooling / heating reversal command, it can instantly drive the duct to complete the angle switch, without waiting for the power transmission of the transmission components, which greatly shortens the waiting time for the switching of operating conditions and makes the indoor temperature adjustment more timely.

[0047] It should be noted that the encoder can achieve high-precision angle control of the direct drive motor, which can accurately drive the three-way irregular air duct 20 to rotate to the preset cooling / heating angle, ensuring that the air duct inlet 210, air duct outlet 220 are completely aligned with the side air vent 110 and bottom air vent 120 of the outer casing, avoiding problems such as air leakage and reduced air delivery efficiency caused by angle deviation; moreover, the direct drive motor is smaller in size and has a simpler layout, and there is no need to reserve extra installation space for transmission components, which can further reduce the internal space occupied by the structural outer casing 10, helping the air conditioner indoor unit to achieve a thinner and smaller design, and improving installation flexibility.

[0048] In some embodiments, the structural housing 10 includes: The outer casing 150 has an outer casing side air vent 110 on its side and an outer casing bottom air vent 120 on its bottom surface; A cross-flow motor housing 130 is located at one end of the outer casing 150 and is used to house the cross-flow motor 410 of the cross-flow fan. The air duct motor receiving cavity 140 is located on the outer casing 150 at one end away from the cross-flow motor receiving cavity 130, and is used to house the air duct rotating motor 310.

[0049] It should be noted that, as Figure 8 , 9 As shown, by setting the cross-flow motor housing 130 and the air duct rotating motor housing 310 at both ends of the outer shell 150, a three-section modular layout is formed with the three-way irregular air duct 20 and the cross-flow fan blade 420 in the middle. This avoids spatial overlap and interference of different functional components, and makes full use of the internal space of the outer shell 150. Under the premise of meeting the installation requirements of all core components, the overall volume of the structural shell 10 is effectively compressed, which helps the air conditioner indoor unit to achieve a thin and light design and is suitable for various installation scenarios such as wall mounting and ceiling mounting. Moreover, the layout of the two motor housings at both ends can make the weight distribution inside the structural shell 10 more even, avoid the center of gravity shift caused by the concentrated arrangement of components. During installation, it can effectively reduce the bending moment load of the structural shell 10 on the mounting bracket, improve the installation stability of the whole unit, and reduce the risk of bracket deformation after long-term use. The outer shell 150 can be cylindrical or hollow cuboid.

[0050] It should be noted that by placing the cross-flow motor 410 and the air duct rotation motor 310 at opposite ends, the close proximity of the two heat sources is avoided, reducing the mutual conduction of heat. At the same time, placing the two motors at opposite ends can prevent the vibrations during operation from being superimposed and amplified. Combined with the limiting and fixing function of the cavity, it can effectively suppress the transmission of motor vibration to the outer shell 150, further reducing the overall operating noise of the machine and improving user comfort.

[0051] Secondly, embodiments of this application provide an air conditioner, including a cross-flow fan airflow direction reversing structure as described in any embodiment of the first aspect, wherein the cross-flow fan airflow direction reversing structure includes: The structural shell 10 has a side air vent 110 on its side and a bottom air vent 120 on its bottom surface. The three-way irregular air duct 20 is located inside the structural shell 10, and its inner side is used to install the cross-flow fan blades 420. It has two symmetrically arranged air duct inlets 210 and an air duct outlet 220 located between the two air duct inlets 210. In cooling mode, the air inlet 210 of one air duct is connected to the lower air outlet 120 of the outer casing, and the air outlet 220 of the air duct is connected to the side air outlet 110 of the outer casing; in heating mode, the three-way irregular air duct 20 is rotated so that the air inlet 210 of the other air duct is connected to the side air outlet 110 of the outer casing, and the air outlet 220 of the air duct is connected to the lower air outlet 120 of the outer casing.

[0052] It should be noted that, as Figure 1 , 2As shown in Figures 3, 4, 5, and 6, the cross-flow fan airflow reversing structure provided in this application embodiment switches the airflow direction through the rotation of the three-way irregular air duct 20. This allows the airflow to enter through the lower air vent 120 of the outer casing and exit through the side air vent 110 of the outer casing during cooling, which conforms to the airflow characteristics of cold air sinking. This ensures that the side air outlet cools down quickly and diffuses evenly during cooling. During heating, by rotating the three-way irregular air duct 20 (e.g., rotating it 90° clockwise), the airflow is switched to enter through the side air vent 110 of the outer casing and exit through the lower air vent 120 of the outer casing. This allows the hot airflow to be directly delivered downwards to the human activity area at the bottom of the room. This solves the problem of hot air rising and uneven temperature distribution when the traditional side-discharge air conditioner is heating, and effectively eliminates the drawback of the "hot above, cold below" temperature difference.

[0053] It should be noted that, compared to the existing centrifugal fan volute rotation / dual air guide plate reversing scheme, this structure is compatible with cross-flow fans and does not rely on the static pressure output of centrifugal fans. On the one hand, the operating noise of cross-flow fans is much lower than that of centrifugal fans, greatly improving user comfort. On the other hand, through the structural design of cross-flow fans and three-way irregular air duct 20, the redundant space required for volute rotation is avoided, effectively reducing the structural volume and lowering the requirements for installation space, making it suitable for various installation scenarios such as small apartments, ceilings, and wall mounting.

[0054] In some embodiments, the three-way irregular air duct 20 includes: Duct housing 260; The air inlet baffle 230 is located inside the air duct shell 260, and its coverage area is larger than the diameter of the cross-flow fan blade 420. The upper air outlet baffle 240 is located inside the air duct housing 260 and opposite the air inlet baffle 230. Its coverage area is smaller than the diameter of the cross-flow fan blade 420. The lower air outlet baffle 250 is located inside the air duct housing 260 and is located on the opposite side of the air inlet baffle 230 and the upper air outlet baffle 240. Its coverage area is smaller than the diameter of the cross-flow fan blade 420. Among them, the air inlet 230 forms an air inlet 210 between the upper air outlet 240 and the lower air outlet 250, and the air outlet 220 forms an air outlet 220 between the upper air outlet 240 and the lower air outlet 250.

[0055] It should be noted that by making the coverage area of ​​the inlet baffle 230 larger than the diameter of the cross-flow fan blade 420, the area of ​​the fan blade that is not inlet can be completely blocked, preventing airflow from leaking in from non-target directions. This ensures that under cooling / heating conditions, the airflow only enters stably from the corresponding air duct inlet 210, improving the directionality of the airflow. By making the coverage area of ​​the upper outlet baffle 240 and the lower outlet baffle 250 smaller than the diameter of the fan blade, sufficient air outlet space is reserved for the air duct outlet 220, and the airflow is also guided and constrained, making the air outlet direction more concentrated (the side air outlet is more uniform during cooling, and the lower air outlet is more accurately delivered to the lower area during heating).

[0056] It should be noted that the two air inlets 210 are formed by the air inlet baffle 230, the upper air outlet baffle 240, and the lower air outlet baffle 250. The symmetrical layout design allows the new air inlet 210 to quickly and accurately connect with the side air outlet 110 and the lower air outlet 120 of the outer shell after the three-way irregular air duct 20 is rotated, without the need for additional adjustment of the baffle structure. This simplifies the reversing operation and ensures the air duct sealing and airflow stability under different working conditions.

[0057] In some embodiments, the width of the air inlet 210 is greater than the width of the air outlet 220, and the air inlet 210 is gradually widened into a trumpet shape from the inside to the outside, while the air outlet 220 is arc-shaped.

[0058] It should be noted that by making the width of the air inlet 210 of the air duct greater than the width of the air outlet 220 of the air duct, and by combining it with its gradually expanding shape, the air intake area can be increased and the air intake velocity can be reduced, allowing the airflow to enter the air duct more smoothly (avoiding air intake congestion); by making the air inlet 210 of the air duct into a trumpet shape, the airflow can be guided to concentrate towards the cross-flow fan blade 420, reducing the energy loss of the airflow in the air intake section and improving the air delivery efficiency of the fan blade; by making the air outlet 220 of the air duct into an arc shape, it can match the airflow trajectory, avoid the airflow impact and turbulence caused by right angle / acute angle structures, and make the airflow smoother when it flows out of the air duct, further reducing wind resistance and ensuring the continuity and stability of the air outlet.

[0059] It should be noted that the arc-shaped and relatively narrow design of the air outlet 220 allows for more concentrated airflow. Combined with the design of the upper air outlet baffle 240 and the lower air outlet baffle 250 mentioned above, the airflow can be more evenly diffused to the side of the room when the air is being discharged from the side in cooling mode; and when the air is being discharged from the side in heating mode, the airflow can be more accurately delivered downwards to the human body area, improving the effectiveness of temperature coverage.

[0060] In some embodiments, the air inlet baffle 230 includes two arc-shaped protrusions and an arc-shaped recess between the two arc-shaped protrusions, the arc-shaped recess being used to accommodate the cross-flow fan blade 420.

[0061] It should be noted that, as Figure 1 , 3 As shown, by adapting the arc-shaped concave shape to the cylindrical shape of the cross-flow fan blade 420, the incoming airflow can flow more closely to the surface of the fan blade, reducing airflow leakage in the gap between the fan blade and the baffle, improving the driving efficiency of the fan blade for airflow, and ensuring effective airflow output. The design of the two arc-shaped protrusions can guide the incoming airflow to concentrate in the arc-shaped concave shape (fan blade area), avoiding the airflow from dispersing and forming turbulence in the air duct. At the same time, the arc-shaped structure conforms to the natural flow trajectory of the airflow, reducing the frictional resistance between the airflow and the baffle, and reducing energy loss during the air delivery process.

[0062] It should be noted that by making the arc-shaped recess fit tightly with the cross-flow fan blade 420, and with the air inlet baffle 230 covering an area larger than the fan blade diameter, the non-air inlet side of the fan blade can be effectively sealed off, preventing airflow from entering through the non-target air duct inlet 210 when switching between cooling and heating modes, thus ensuring the accuracy of airflow direction under different operating conditions.

[0063] In some embodiments, the cross-flow fan air direction reversing structure further includes a duct rotation mechanism 30, which is connected to a three-way irregular air duct 20 and is used to drive the three-way irregular air duct 20 to rotate relative to the structural shell 10.

[0064] It should be noted that the linkage design between the air duct rotation mechanism 30 and the three-way irregular air duct 20 enables intelligent switching of airflow direction. By driving the three-way irregular air duct 20 to rotate relative to the structural shell 10, the connection relationship between the air duct inlet 210, the air duct outlet 220 and the side air outlet 110 and the bottom air outlet 120 of the shell can be precisely changed. When cooling, side air outlet is achieved, and when heating, bottom air outlet is achieved. This solves the pain point of traditional air conditioners that are "efficient in cooling but uneven in heating" from a structural perspective, ensuring the best air delivery effect under dual conditions. Moreover, the air duct rotation mechanism 30 can be automatically reversed by electronic control commands, without the need for manual adjustment of the air guide plate or disassembly of the air duct. Users only need to switch the air conditioner operating mode to achieve synchronous switching of airflow direction, simplifying the operation process and improving the convenience of use.

[0065] In some embodiments, the duct rotation mechanism 30 includes: The air duct rotation motor 310 is located inside the structural housing 10; The crisscrossing limit switch 320 is located at the output end of the air duct rotation motor 310; Intersecting grooves are provided on the end face of the air duct housing 260 and are connected to the intersecting limiters 320.

[0066] It should be noted that, as Figure 7 , 10 As shown, by making the crisscross limiter 320 at the output end of the duct rotation motor 310 and the crisscross groove on the end face of the duct housing 260 form a precise fit, circumferential slippage and radial movement during transmission can be eliminated. This ensures that the three-way irregular duct 20 can rotate to the preset angle in one go when switching between cooling and heating modes, achieving precise docking of the duct inlet 210, outlet and the side air outlet 110 and bottom air outlet 120 of the housing, avoiding air leakage or incomplete reversal that could lead to a decrease in air delivery efficiency.

[0067] It should be noted that the "limiting groove" interlocking structure is directly driven by the duct rotation motor 310, eliminating the need for intermediate deceleration or redundant transmission components. This results in a shorter power transmission path and lower losses. After the operating condition switching command is issued, the duct rotation action can be completed quickly, reducing the waiting time for switching between cooling and heating modes and improving the user experience. Furthermore, compared to traditional positioning methods such as single keys and pins, the crisscrossing limiting groove structure has a larger contact area and more even force distribution, effectively resisting the vibration and airflow impact generated during the operation of the cross-flow fan. This prevents angular deviation of the duct during operation and ensures the structural stability of long-term operation.

[0068] In some embodiments, the duct rotation mechanism 30 includes: The air duct rotation motor 310 is located inside the structural housing 10; The air duct support shaft is located on the end face of the air duct housing 260 and is connected to the output end of the air duct rotation motor 310; The air duct support plate is located inside the structural shell 10 and has a support shaft groove for accommodating the air duct support shaft.

[0069] It should be noted that the duct support shaft is coaxially connected to the output end of the duct rotation motor 310. With the support shaft groove on the duct support plate for radial limiting of the support shaft, radial movement and circumferential slippage during transmission can be eliminated. This ensures that the three-way irregular duct 20 rotates to the preset angle in one go when switching between cooling and heating modes, achieving precise docking of the duct inlet 210, duct outlet 220 with the side air outlet 110 and bottom air outlet 120 of the outer casing, thus avoiding airflow leakage or reduced air delivery efficiency.

[0070] It should be noted that there can be two duct support shafts, which are respectively located on both sides of the duct housing 260. Correspondingly, there are also two duct support plates, with the two duct support shafts located in the support shaft grooves. This forms a symmetrical bidirectional support structure, which can evenly distribute the gravity and rotational stress of the three-way irregular duct 20 to the support points on both sides, avoiding the duct tilting and jamming problems caused by torque imbalance when supported on one side, and ensuring that the three-way irregular duct 20 rotates smoothly. Moreover, the bidirectional support structure greatly improves the connection rigidity between the duct housing 260 and the duct rotation mechanism 30, which can effectively resist the high-frequency vibration generated by the cross-flow fan during operation and the instantaneous load caused by airflow impact, preventing the duct from loosening or shifting during operation, and ensuring that the duct inlet 210, duct outlet 220 and the outer shell side outlet 110 and outer shell bottom outlet 120 can still be accurately connected after long-term use.

[0071] In some embodiments, the duct rotation motor 310 is a direct drive motor.

[0072] It should be noted that the direct drive motor does not require intermediate transmission components such as gearboxes and pulleys, and can directly drive the duct support shaft to rotate, eliminating the mechanical friction loss and energy transmission loss in traditional indirect transmission, ensuring that the rotation efficiency of the three-way irregular duct 20 reaches the optimal level; moreover, the direct drive motor has the characteristics of fast start-up response and strong speed controllability. After receiving the cooling / heating reversal command, it can instantly drive the duct to complete the angle switch, without waiting for the power transmission of the transmission components, which greatly shortens the waiting time for the switching of operating conditions and makes the indoor temperature adjustment more timely.

[0073] It should be noted that the encoder can achieve high-precision angle control of the direct drive motor, which can accurately drive the three-way irregular air duct 20 to rotate to the preset cooling / heating angle, ensuring that the air duct inlet 210, air duct outlet 220 are completely aligned with the side air vent 110 and bottom air vent 120 of the outer casing, avoiding problems such as air leakage and reduced air delivery efficiency caused by angle deviation; moreover, the direct drive motor is smaller in size and has a simpler layout, and there is no need to reserve extra installation space for transmission components, which can further reduce the internal space occupied by the structural outer casing 10, helping the air conditioner indoor unit to achieve a thinner and smaller design, and improving installation flexibility.

[0074] In some embodiments, the structural housing 10 includes: The outer casing 150 has an outer casing side air vent 110 on its side and an outer casing bottom air vent 120 on its bottom surface; A cross-flow motor housing 130 is located at one end of the outer casing 150 and is used to house the cross-flow motor 410 of the cross-flow fan. The air duct motor receiving cavity 140 is located on the outer casing 150 at one end away from the cross-flow motor receiving cavity 130, and is used to house the air duct rotating motor 310.

[0075] It should be noted that, as Figure 8 , 9 As shown, by setting the cross-flow motor housing 130 and the air duct rotating motor housing 310 at both ends of the outer shell 150, a three-section modular layout is formed with the three-way irregular air duct 20 and the cross-flow fan blade 420 in the middle. This avoids spatial overlap and interference of different functional components, and makes full use of the internal space of the outer shell 150. Under the premise of meeting the installation requirements of all core components, the overall volume of the structural shell 10 is effectively compressed, which helps the air conditioner indoor unit to achieve a thin and light design and is suitable for various installation scenarios such as wall mounting and ceiling mounting. Moreover, the layout of the two motor housings at both ends can make the weight distribution inside the structural shell 10 more even, avoid the center of gravity shift caused by the concentrated arrangement of components. During installation, it can effectively reduce the bending moment load of the structural shell 10 on the mounting bracket, improve the installation stability of the whole unit, and reduce the risk of bracket deformation after long-term use. The outer shell 150 can be cylindrical or hollow cuboid.

[0076] It should be noted that by placing the cross-flow motor 410 and the air duct rotation motor 310 at opposite ends, the close proximity of the two heat sources is avoided, reducing the mutual conduction of heat. At the same time, placing the two motors at opposite ends can prevent the vibrations during operation from being superimposed and amplified. Combined with the limiting and fixing function of the cavity, it can effectively suppress the transmission of motor vibration to the outer shell 150, further reducing the overall operating noise of the machine and improving user comfort.

[0077] Thirdly, embodiments of this application provide a smart home system, the smart home system including an air conditioner as described in any one of the second aspects, the air conditioner including a cross-flow fan airflow direction reversing structure as described in any embodiment of the first aspect, the cross-flow fan airflow direction reversing structure including: The structural shell 10 has a side air vent 110 on its side and a bottom air vent 120 on its bottom surface. The three-way irregular air duct 20 is located inside the structural shell 10, and its inner side is used to install the cross-flow fan blades 420. It has two symmetrically arranged air duct inlets 210 and an air duct outlet 220 located between the two air duct inlets 210. In cooling mode, the air inlet 210 of one air duct is connected to the lower air outlet 120 of the outer casing, and the air outlet 220 of the air duct is connected to the side air outlet 110 of the outer casing; in heating mode, the three-way irregular air duct 20 is rotated so that the air inlet 210 of the other air duct is connected to the side air outlet 110 of the outer casing, and the air outlet 220 of the air duct is connected to the lower air outlet 120 of the outer casing.

[0078] It should be noted that, as Figure 1 , 2 As shown in Figures 3, 4, 5, and 6, the cross-flow fan airflow reversing structure provided in this application embodiment switches the airflow direction through the rotation of the three-way irregular air duct 20. This allows the airflow to enter through the lower air vent 120 of the outer casing and exit through the side air vent 110 of the outer casing during cooling, which conforms to the airflow characteristics of cold air sinking. This ensures that the side air outlet cools down quickly and diffuses evenly during cooling. During heating, by rotating the three-way irregular air duct 20 (e.g., rotating it 90° clockwise), the airflow is switched to enter through the side air vent 110 of the outer casing and exit through the lower air vent 120 of the outer casing. This allows the hot airflow to be directly delivered downwards to the human activity area at the bottom of the room. This solves the problem of hot air rising and uneven temperature distribution when the traditional side-discharge air conditioner is heating, and effectively eliminates the drawback of the "hot above, cold below" temperature difference.

[0079] It should be noted that, compared to the existing centrifugal fan volute rotation / dual air guide plate reversing scheme, this structure is compatible with cross-flow fans and does not rely on the static pressure output of centrifugal fans. On the one hand, the operating noise of cross-flow fans is much lower than that of centrifugal fans, greatly improving user comfort. On the other hand, through the structural design of cross-flow fans and three-way irregular air duct 20, the redundant space required for volute rotation is avoided, effectively reducing the structural volume and lowering the requirements for installation space, making it suitable for various installation scenarios such as small apartments, ceilings, and wall mounting.

[0080] In some embodiments, the three-way irregular air duct 20 includes: Duct housing 260; The air inlet baffle 230 is located inside the air duct shell 260, and its coverage area is larger than the diameter of the cross-flow fan blade 420. The upper air outlet baffle 240 is located inside the air duct housing 260 and opposite the air inlet baffle 230. Its coverage area is smaller than the diameter of the cross-flow fan blade 420. The lower air outlet baffle 250 is located inside the air duct housing 260 and is located on the opposite side of the air inlet baffle 230 and the upper air outlet baffle 240. Its coverage area is smaller than the diameter of the cross-flow fan blade 420. Among them, the air inlet 230 forms an air inlet 210 between the upper air outlet 240 and the lower air outlet 250, and the air outlet 220 forms an air outlet 220 between the upper air outlet 240 and the lower air outlet 250.

[0081] It should be noted that by making the coverage area of ​​the inlet baffle 230 larger than the diameter of the cross-flow fan blade 420, the area of ​​the fan blade that is not inlet can be completely blocked, preventing airflow from leaking in from non-target directions. This ensures that under cooling / heating conditions, the airflow only enters stably from the corresponding air duct inlet 210, improving the directionality of the airflow. By making the coverage area of ​​the upper outlet baffle 240 and the lower outlet baffle 250 smaller than the diameter of the fan blade, sufficient air outlet space is reserved for the air duct outlet 220, and the airflow is also guided and constrained, making the air outlet direction more concentrated (the side air outlet is more uniform during cooling, and the lower air outlet is more accurately delivered to the lower area during heating).

[0082] It should be noted that the two air inlets 210 are formed by the air inlet baffle 230, the upper air outlet baffle 240, and the lower air outlet baffle 250. The symmetrical layout design allows the new air inlet 210 to quickly and accurately connect with the side air outlet 110 and the lower air outlet 120 of the outer shell after the three-way irregular air duct 20 is rotated, without the need for additional adjustment of the baffle structure. This simplifies the reversing operation and ensures the air duct sealing and airflow stability under different working conditions.

[0083] In some embodiments, the width of the air inlet 210 is greater than the width of the air outlet 220, and the air inlet 210 is gradually widened into a trumpet shape from the inside to the outside, while the air outlet 220 is arc-shaped.

[0084] It should be noted that by making the width of the air inlet 210 of the air duct greater than the width of the air outlet 220 of the air duct, and by combining it with its gradually expanding shape, the air intake area can be increased and the air intake velocity can be reduced, allowing the airflow to enter the air duct more smoothly (avoiding air intake congestion); by making the air inlet 210 of the air duct into a trumpet shape, the airflow can be guided to concentrate towards the cross-flow fan blade 420, reducing the energy loss of the airflow in the air intake section and improving the air delivery efficiency of the fan blade; by making the air outlet 220 of the air duct into an arc shape, it can match the airflow trajectory, avoid the airflow impact and turbulence caused by right angle / acute angle structures, and make the airflow smoother when it flows out of the air duct, further reducing wind resistance and ensuring the continuity and stability of the air outlet.

[0085] It should be noted that the arc-shaped and relatively narrow design of the air outlet 220 allows for more concentrated airflow. Combined with the design of the upper air outlet baffle 240 and the lower air outlet baffle 250 mentioned above, the airflow can be more evenly diffused to the side of the room when the air is being discharged from the side in cooling mode; and when the air is being discharged from the side in heating mode, the airflow can be more accurately delivered downwards to the human body area, improving the effectiveness of temperature coverage.

[0086] In some embodiments, the air inlet baffle 230 includes two arc-shaped protrusions and an arc-shaped recess between the two arc-shaped protrusions, the arc-shaped recess being used to accommodate the cross-flow fan blade 420.

[0087] It should be noted that, as Figure 1 , 3 As shown, by adapting the arc-shaped concave shape to the cylindrical shape of the cross-flow fan blade 420, the incoming airflow can flow more closely to the surface of the fan blade, reducing airflow leakage in the gap between the fan blade and the baffle, improving the driving efficiency of the fan blade for airflow, and ensuring effective airflow output. The design of the two arc-shaped protrusions can guide the incoming airflow to concentrate in the arc-shaped concave shape (fan blade area), avoiding the airflow from dispersing and forming turbulence in the air duct. At the same time, the arc-shaped structure conforms to the natural flow trajectory of the airflow, reducing the frictional resistance between the airflow and the baffle, and reducing energy loss during the air delivery process.

[0088] It should be noted that by making the arc-shaped recess fit tightly with the cross-flow fan blade 420, and with the air inlet baffle 230 covering an area larger than the fan blade diameter, the non-air inlet side of the fan blade can be effectively sealed off, preventing airflow from entering through the non-target air duct inlet 210 when switching between cooling and heating modes, thus ensuring the accuracy of airflow direction under different operating conditions.

[0089] In some embodiments, the cross-flow fan air direction reversing structure further includes a duct rotation mechanism 30, which is connected to a three-way irregular air duct 20 and is used to drive the three-way irregular air duct 20 to rotate relative to the structural shell 10.

[0090] It should be noted that the linkage design between the air duct rotation mechanism 30 and the three-way irregular air duct 20 enables intelligent switching of airflow direction. By driving the three-way irregular air duct 20 to rotate relative to the structural shell 10, the connection relationship between the air duct inlet 210, the air duct outlet 220 and the side air outlet 110 and the bottom air outlet 120 of the shell can be precisely changed. When cooling, side air outlet is achieved, and when heating, bottom air outlet is achieved. This solves the pain point of traditional air conditioners that are "efficient in cooling but uneven in heating" from a structural perspective, ensuring the best air delivery effect under dual conditions. Moreover, the air duct rotation mechanism 30 can be automatically reversed by electronic control commands, without the need for manual adjustment of the air guide plate or disassembly of the air duct. Users only need to switch the air conditioner operating mode to achieve synchronous switching of airflow direction, simplifying the operation process and improving the convenience of use.

[0091] In some embodiments, the duct rotation mechanism 30 includes: The air duct rotation motor 310 is located inside the structural housing 10; The crisscrossing limit switch 320 is located at the output end of the air duct rotation motor 310; Intersecting grooves are provided on the end face of the air duct housing 260 and are connected to the intersecting limiters 320.

[0092] It should be noted that, as Figure 7 , 10 As shown, by making the crisscross limiter 320 at the output end of the duct rotation motor 310 and the crisscross groove on the end face of the duct housing 260 form a precise fit, circumferential slippage and radial movement during transmission can be eliminated. This ensures that the three-way irregular duct 20 can rotate to the preset angle in one go when switching between cooling and heating modes, achieving precise docking of the duct inlet 210, outlet and the side air outlet 110 and bottom air outlet 120 of the housing, avoiding air leakage or incomplete reversal that could lead to a decrease in air delivery efficiency.

[0093] It should be noted that the "limiting groove" interlocking structure is directly driven by the duct rotation motor 310, eliminating the need for intermediate deceleration or redundant transmission components. This results in a shorter power transmission path and lower losses. After the operating condition switching command is issued, the duct rotation action can be completed quickly, reducing the waiting time for switching between cooling and heating modes and improving the user experience. Furthermore, compared to traditional positioning methods such as single keys and pins, the crisscrossing limiting groove structure has a larger contact area and more even force distribution, effectively resisting the vibration and airflow impact generated during the operation of the cross-flow fan. This prevents angular deviation of the duct during operation and ensures the structural stability of long-term operation.

[0094] In some embodiments, the duct rotation mechanism 30 includes: The air duct rotation motor 310 is located inside the structural housing 10; The air duct support shaft is located on the end face of the air duct housing 260 and is connected to the output end of the air duct rotation motor 310; The air duct support plate is located inside the structural shell 10 and has a support shaft groove for accommodating the air duct support shaft.

[0095] It should be noted that the duct support shaft is coaxially connected to the output end of the duct rotation motor 310. With the support shaft groove on the duct support plate for radial limiting of the support shaft, radial movement and circumferential slippage during transmission can be eliminated. This ensures that the three-way irregular duct 20 rotates to the preset angle in one go when switching between cooling and heating modes, achieving precise docking of the duct inlet 210, duct outlet 220 with the side air outlet 110 and bottom air outlet 120 of the outer casing, thus avoiding airflow leakage or reduced air delivery efficiency.

[0096] It should be noted that there can be two duct support shafts, which are respectively located on both sides of the duct housing 260. Correspondingly, there are also two duct support plates, with the two duct support shafts located in the support shaft grooves. This forms a symmetrical bidirectional support structure, which can evenly distribute the gravity and rotational stress of the three-way irregular duct 20 to the support points on both sides, avoiding the duct tilting and jamming problems caused by torque imbalance when supported on one side, and ensuring that the three-way irregular duct 20 rotates smoothly. Moreover, the bidirectional support structure greatly improves the connection rigidity between the duct housing 260 and the duct rotation mechanism 30, which can effectively resist the high-frequency vibration generated by the cross-flow fan during operation and the instantaneous load caused by airflow impact, preventing the duct from loosening or shifting during operation, and ensuring that the duct inlet 210, duct outlet 220 and the outer shell side outlet 110 and outer shell bottom outlet 120 can still be accurately connected after long-term use.

[0097] In some embodiments, the duct rotation motor 310 is a direct drive motor.

[0098] It should be noted that the direct drive motor does not require intermediate transmission components such as gearboxes and pulleys, and can directly drive the duct support shaft to rotate, eliminating the mechanical friction loss and energy transmission loss in traditional indirect transmission, ensuring that the rotation efficiency of the three-way irregular duct 20 reaches the optimal level; moreover, the direct drive motor has the characteristics of fast start-up response and strong speed controllability. After receiving the cooling / heating reversal command, it can instantly drive the duct to complete the angle switch, without waiting for the power transmission of the transmission components, which greatly shortens the waiting time for the switching of operating conditions and makes the indoor temperature adjustment more timely.

[0099] It should be noted that the encoder can achieve high-precision angle control of the direct drive motor, which can accurately drive the three-way irregular air duct 20 to rotate to the preset cooling / heating angle, ensuring that the air duct inlet 210, air duct outlet 220 are completely aligned with the side air vent 110 and bottom air vent 120 of the outer casing, avoiding problems such as air leakage and reduced air delivery efficiency caused by angle deviation; moreover, the direct drive motor is smaller in size and has a simpler layout, and there is no need to reserve extra installation space for transmission components, which can further reduce the internal space occupied by the structural outer casing 10, helping the air conditioner indoor unit to achieve a thinner and smaller design, and improving installation flexibility.

[0100] In some embodiments, the structural housing 10 includes: The outer casing 150 has an outer casing side air vent 110 on its side and an outer casing bottom air vent 120 on its bottom surface; A cross-flow motor housing 130 is located at one end of the outer casing 150 and is used to house the cross-flow motor 410 of the cross-flow fan. The air duct motor receiving cavity 140 is located on the outer casing 150 at one end away from the cross-flow motor receiving cavity 130, and is used to house the air duct rotating motor 310.

[0101] It should be noted that, as Figure 8 , 9 As shown, by setting the cross-flow motor housing 130 and the air duct rotating motor housing 310 at both ends of the outer shell 150, a three-section modular layout is formed with the three-way irregular air duct 20 and the cross-flow fan blade 420 in the middle. This avoids spatial overlap and interference of different functional components, and makes full use of the internal space of the outer shell 150. Under the premise of meeting the installation requirements of all core components, the overall volume of the structural shell 10 is effectively compressed, which helps the air conditioner indoor unit to achieve a thin and light design and is suitable for various installation scenarios such as wall mounting and ceiling mounting. Moreover, the layout of the two motor housings at both ends can make the weight distribution inside the structural shell 10 more even, avoid the center of gravity shift caused by the concentrated arrangement of components. During installation, it can effectively reduce the bending moment load of the structural shell 10 on the mounting bracket, improve the installation stability of the whole unit, and reduce the risk of bracket deformation after long-term use. The outer shell 150 can be cylindrical or hollow cuboid.

[0102] It should be noted that by placing the cross-flow motor 410 and the air duct rotation motor 310 at opposite ends, the close proximity of the two heat sources is avoided, reducing the mutual conduction of heat. At the same time, placing the two motors at opposite ends can prevent the vibrations during operation from being superimposed and amplified. Combined with the limiting and fixing function of the cavity, it can effectively suppress the transmission of motor vibration to the outer shell 150, further reducing the overall operating noise of the machine and improving user comfort.

[0103] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0104] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0105] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A cross-flow fan air direction reversing structure, characterized in that, include: The structural shell has side air vents on its sides and bottom air vents on its bottom. A three-way irregular-shaped air duct is located inside the outer shell of the structure, and its inner side is used to install the cross-flow fan blades. It has two symmetrically arranged air duct inlets and an air duct outlet located between the two air duct inlets. In cooling mode, one of the air duct inlets is connected to the lower air outlet of the outer casing, and the air duct outlet is connected to the side air outlet of the outer casing; in heating mode, the three-way irregular air duct is rotated so that the other air duct inlet is connected to the side air outlet of the outer casing, and the air duct outlet is connected to the lower air outlet of the outer casing.

2. The cross-flow fan airflow reversing structure according to claim 1, characterized in that, The three-way irregular air duct includes: Duct housing; An air inlet baffle is located inside the air duct housing, and its coverage area is larger than the diameter of the cross-flow fan blade. The upper air outlet baffle is located inside the air duct housing and opposite the air inlet baffle. Its coverage area is smaller than the diameter of the cross-flow fan blade. The lower air outlet baffle is located inside the air duct housing and is situated on the opposite side of the air inlet baffle and the upper air outlet baffle. Its coverage area is smaller than the diameter of the cross-flow fan blade. The air inlet baffle, the upper air outlet baffle, and the lower air outlet baffle form two air duct inlets, and the air outlet baffle, the upper air outlet baffle, and the lower air outlet baffle form the air duct outlet.

3. The cross-flow fan airflow reversing structure according to claim 2, characterized in that, The width of the air inlet of the air duct is greater than the width of the air outlet of the air duct, and the air inlet of the air duct is gradually widened into a trumpet shape from the inside to the outside, while the air outlet of the air duct is arc-shaped.

4. The cross-flow fan airflow reversing structure according to claim 2, characterized in that, The air inlet baffle includes two arc-shaped protrusions and an arc-shaped recess between the two arc-shaped protrusions, the arc-shaped recess being used to accommodate the cross-flow fan blade.

5. The cross-flow fan airflow reversing structure according to claim 2, characterized in that, It also includes a duct rotation mechanism, which is connected to the three-way irregular duct and is used to drive the three-way irregular duct to rotate relative to the structural shell.

6. The cross-flow fan airflow reversing structure according to claim 5, characterized in that, The air duct rotation mechanism includes: The air duct rotation motor is located inside the outer casing of the structure. Intersecting limiters are located at the output end of the air duct rotating motor; Intersecting grooves are provided on the end face of the air duct housing and are connected to the intersecting limiting mechanism.

7. The cross-flow fan airflow reversing structure according to claim 5, characterized in that, The air duct rotation mechanism includes: The air duct rotation motor is located inside the outer casing of the structure. A duct support shaft is located on the end face of the duct housing and is connected to the output end of the duct rotation motor. A duct support plate is disposed inside the outer shell of the structure, and a support shaft groove is provided thereon, the support shaft groove being used to accommodate the duct support shaft.

8. The cross-flow fan airflow reversing structure according to any one of claims 6 or 7, characterized in that, The duct rotation motor is a direct drive motor.

9. The cross-flow fan airflow reversing structure according to any one of claims 6 or 7, characterized in that, The outer shell of the structure includes: The outer casing has a side air vent on its side and a bottom air vent on its bottom surface. A cross-flow motor housing cavity is located at one end of the outer shell and is used to house the cross-flow motor of the cross-flow fan; The air duct motor receiving cavity is located on the outer shell at one end away from the cross-flow motor receiving cavity, and is used to house the air duct rotating motor.

10. An air conditioner, characterized in that, Includes the cross-flow fan air direction reversing structure as described in any one of claims 1-9.

Images