Indoor unit and air conditioner

Abstract

The invention relates to an indoor unit and an air conditioner, and relates to the technical field of air conditioners. According to the indoor unit, a shell comprises a first air opening and a second air opening; the fixed volute comprises a first air duct outlet and a second air duct outlet; the first filtering assembly can cover or avoid the first air opening; the second filtering assembly divides the second air opening into an air outlet and an air return opening. The switching assembly can open and close the first air duct outlet, the second air duct outlet, the air return port and the air outlet; in the first air outlet state, the switching assembly opens the first air duct outlet, closes the second air duct outlet, opens the air return opening and closes the air outlet, and the first filtering assembly avoids the first air opening; in the second air outlet state, the switching assembly closes the first air duct outlet, opens the second air duct outlet, closes the air return opening and opens the air outlet, and the first filtering assembly covers the first air opening. According to the technical scheme, the problem that a filtering structure of an existing two-way air outlet air conditioner is difficult to adapt to the airflow direction requirement can be solved.

Description

Technical Field

[0001] This application relates to the field of air conditioning, and more particularly to an indoor unit and an air conditioner. Background Technology

[0002] To address the issues of uneven temperature control and low efficiency in unidirectional air-discharge air conditioners, some models are designed with two vents facing different directions. By switching the vent mode, the airflow direction can be adjusted to optimize indoor airflow circulation and improve temperature control. The filtration structure is a critical component of an air conditioner, used to intercept dust and other impurities, preventing them from entering core components such as air ducts and heat exchangers, ensuring stable equipment operation. Traditional unidirectional air-discharge air conditioners, with their fixed airflow direction, only require a filter installed at the return air vent for effective filtration. However, in bidirectional air-discharge air conditioners, the airflow direction changes with the vent mode switching, resulting in a more complex flow path. Existing filtration structures are insufficient to adapt to these airflow direction requirements. Summary of the Invention

[0003] This application provides an indoor unit and an air conditioner to solve the problem that the filtration structure of existing bidirectional air-discharge air conditioners is difficult to adapt to their airflow direction requirements.

[0004] In a first aspect, this application provides an indoor unit, comprising: The casing includes a first air vent and a second air vent facing different directions; A fixed volute is disposed within the housing, and the fixed volute includes a first air duct outlet and a second air duct outlet; A first filter component is movably disposed at the first air outlet, and the first filter component is configured to selectively cover or avoid the first air outlet. The second filter assembly is disposed at the second air outlet. The second filter assembly includes a ventilation section and a filter section that are isolated from each other, so as to divide the second air outlet into an air outlet that corresponds to and communicates with the ventilation section and an air return outlet that corresponds to and communicates with the filter section. A switching component is movably disposed on the fixed volute; the switching component is configured to selectively open and close the first air duct outlet, the second air duct outlet, the return air inlet, and the air outlet. The indoor unit has a first air outlet state and a second air outlet state. In the first air outlet state, the switching component opens the first air duct outlet and closes the second air duct outlet, and opens the return air vent and closes the air outlet, with the first filter component avoiding the first air outlet. In the second air outlet state, the switching component closes the first air duct outlet and opens the second air duct outlet, and closes the return air vent and opens the air outlet, with the first filter component covering the first air outlet.

[0005] In some embodiments, the switching component includes: A movable volute is rotatably disposed within the fixed volute, and the movable volute is configured to selectively open or close the first air duct outlet, the second air duct outlet, and the air outlet by rotation; A baffle is connected to the moving volute and located outside the fixed volute. The baffle is configured to rotate synchronously with the moving volute to selectively open or close the return air inlet. In the first air outlet state, the moving volute opens the first air duct outlet and closes the second air duct outlet and the air outlet, and the baffle opens the return air outlet; In the second air outlet state, the moving volute closes the first air duct outlet and opens the second air duct outlet and the air outlet, and the baffle closes the return air outlet.

[0006] In some embodiments, there are multiple fixed volutes arranged at intervals along the length of the housing, and each fixed volute is provided with a movable volute. The baffles are multiple and are arranged at intervals along the length direction; the multiple moving volutes and the multiple baffles are arranged alternately along the length direction. The second filter assembly includes a plurality of ventilation sections and a plurality of filter sections arranged alternately along the length direction to divide the second air outlet into a plurality of air outlets and a plurality of air return outlets arranged alternately along the length direction. The baffles correspond one-to-one with the return air inlets, and the baffles are configured to control the opening and closing of the corresponding return air inlets; the moving volutes correspond one-to-one with the air outlets, and the moving volutes are configured to control the opening and closing of the corresponding air outlets.

[0007] In some embodiments, the first air duct outlet faces and is connected to the first air outlet, and the second air duct outlet faces and is connected to the second air outlet.

[0008] In some embodiments, the second filter assembly includes a frame, the frame including a plurality of return air grilles and outlet air grilles arranged alternately along the length direction; The return air grille is equipped with a filter screen to form the filtration section; the outlet air grille is open to form the ventilation section.

[0009] In some embodiments, the first filter assembly includes an upper filter element and a lower filter element, both of which include an adapter end and a free end, the adapter end being rotatably disposed on the housing; In the first air outlet state, the free ends of the upper filter and the lower filter are far apart from each other to avoid the first air outlet; in the second air outlet state, the free ends of the upper filter and the lower filter are connected to each other to cover the first air outlet.

[0010] In some embodiments, the first air vent is located on the side wall of the housing, and the second air vent is located on the bottom wall of the housing; the indoor unit further includes: Mounting base, disposed on the top wall of the housing; A water receiving tray is disposed on the bottom wall of the shell; The upper filter element's adapter end is rotatably mounted on the mounting base, and the lower filter element's adapter end is rotatably mounted on the water receiving tray.

[0011] In some embodiments, the indoor unit further includes a heat exchanger disposed within the housing, the heat exchanger being located between the first filter assembly and the fixed volute; wherein the side of the heat exchanger facing the first air outlet has a predetermined distance from the first air outlet.

[0012] In some embodiments, the preset spacing is 70mm to 100mm.

[0013] In some embodiments, the heat exchanger includes an upper heat exchanger and a lower heat exchanger arranged sequentially in the height direction of the housing; The upper heat exchanger has a first angle with the width direction of the shell. In the width direction, the distance between the end of the upper heat exchanger away from the lower heat exchanger and the first air outlet is greater than the distance between the end of the upper heat exchanger closer to the lower heat exchanger and the first air outlet. The lower heat exchanger has a second angle with the width direction. In the width direction, the distance between the end of the lower heat exchanger away from the upper heat exchanger and the first air outlet is greater than the distance between the end of the lower heat exchanger closer to the upper heat exchanger and the first air outlet. Wherein, the first included angle is smaller than the second included angle.

[0014] In some embodiments, the first included angle is 30° to 45° and the second included angle is 70° to 85°.

[0015] Secondly, this application provides an air conditioner, including the indoor unit as described above.

[0016] The technical solutions provided in this application have the following advantages compared with the prior art: The indoor unit provided in this application embodiment can switch between a first air outlet state and a second air outlet state by selectively opening and closing the first air duct outlet, the second air duct outlet, the return air vent, and the air outlet through a switching component, and by cooperating with the operation of the first filter component. Specifically, in the first air outlet state, airflow is drawn in through the return air vent of the second air outlet and blown out through the first air duct outlet and the first air outlet, achieving directional air supply in the first direction. In the second air outlet state, airflow is drawn in through the first air outlet and blown out through the second air duct outlet and the air outlet of the second air outlet, achieving directional air supply in the second direction. This allows the indoor unit to flexibly adjust the airflow direction and circulation path according to actual temperature control needs (such as cooling or heating), solving the problem of uneven indoor temperature distribution caused by a single air outlet direction, and effectively improving the overall temperature control effect and user comfort. Simultaneously, the second air outlet is divided into an air outlet and a return air outlet by the second filter component, and in conjunction with the movable setting of the first filter component, on-demand filtration is achieved. When airflow exits from the first air outlet (first air outlet state), the first filter component avoids the first air outlet, eliminating the obstruction of the airflow and ensuring the maximum effective flow area. This significantly reduces the airflow resistance to ensure strong airflow capacity and circulating air volume. When airflow enters from the first air outlet (second air outlet state), the first filter component covers the first air outlet to ensure that the intake airflow is filtered, ensuring heat exchange efficiency and avoiding excessive airflow resistance as is common with traditional fixed filters. The major issue is achieving a perfect balance between smooth airflow and clean air intake. Regardless of the indoor unit's airflow state, the intake airflow is effectively filtered. In the first airflow state, impurities are intercepted when the airflow enters through the filter section (return air inlet) of the second filter component. In the second airflow state, impurities are also intercepted when the airflow enters through the first filter component covering the first air inlet. This effectively prevents dust, hair, and other impurities from entering the core components such as the air duct, heat exchanger, and fan inside the stator casing, avoiding reduced heat exchange efficiency, air duct blockage, or fan failure caused by dust accumulation, thereby extending the service life of the air conditioner. In addition, this application uses a fixed volute as the foundation of the air duct and integrates a second filter component with a separation function at the second air outlet, so that the dual air outlet switching mechanism does not need to occupy too much extra space, and the structure is more compact than setting two independent air intake and exhaust systems. Attached Figure Description

[0017] 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.

[0018] 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.

[0019] 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.

[0020] Figure 1 A sectional view of the indoor unit in the first air outlet state provided in an embodiment of this application, viewed from the side. Figure 2 A perspective view of the indoor unit in the first air outlet state provided in an embodiment of this application; Figure 3 A sectional view of the indoor unit in the second air outlet state provided in an embodiment of this application, viewed from the side. Figure 4 A perspective view of the indoor unit in the second air outlet state provided in the embodiments of this application. Figure 5 This is a schematic diagram of the structure of the switching component provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of the second filtering component provided in an embodiment of this application; Figure 7 This is a partial dimensional diagram of the indoor unit provided in an embodiment of this application.

[0021] Explanation of reference numerals in the attached figures: 10. Casing; 110. First air vent; 120. Second air vent; 20. Fixed volute; 210. First air duct outlet; 220. Second air duct outlet; 230. First fixed volute; 240. Second fixed volute; 30. First filter assembly; 310. Upper filter element; 320. Lower filter element; 40. Second filter assembly; 410. Ventilation section; 420. Filter section; 430. Frame; 4301. Return air grille; 4302. Exit air grille; 440. Filter screen; 50. Switching component; 510. Moving volute; 5101. First limiting part; 5102. Second limiting part; 520. Baffle; 60. Mounting bracket; 70. Water tray; 80. Heat exchanger; 810. Upper heat exchanger; 820. Lower heat exchanger. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] 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.

[0025] To address the issues of uneven indoor temperature distribution and low temperature control efficiency caused by a single airflow direction, some air conditioners are equipped with two independent air vents. These two vents are designed with differentiated orientations (e.g., facing different areas of the room or arranged at specific angles). Users can flexibly adjust the airflow direction by switching the vent's operating mode (e.g., single vent operation, simultaneous operation of both vents, or switching different vent combinations) according to their actual temperature control needs. This achieves reasonable airflow circulation within the room, effectively improving overall temperature control and user comfort. Furthermore, the filter structure, as a core auxiliary component of the air conditioner, primarily intercepts dust, hair, and other impurities from the air, preventing them from entering the air duct components, heat exchanger, and fan, thus preventing problems such as duct blockage, reduced heat exchanger efficiency, and fan malfunction. This ensures stable operation of the air conditioner and extends its service life. For traditional unidirectional air conditioners, since the airflow direction is relatively fixed (air enters from a single return air inlet and exits from a single air outlet), the design of the filtration structure is relatively simple. Usually, a filter screen is directly installed at the return air inlet to effectively filter the airflow entering the air conditioner.

[0026] However, for the aforementioned bidirectional air-discharge air conditioner with two vents, its airflow characteristics differ significantly from those of a traditional unidirectional air-discharge air conditioner. Firstly, the direction of the incoming and outgoing airflow changes with the vent mode switching, potentially resulting in different vents alternately performing both incoming and outgoing functions. Secondly, the dual-vent design makes the airflow path more complex, placing higher demands on the adaptability of the filtration structure. Existing filtration structures are mostly fixed filters designed for unidirectional airflow, which cannot adapt to changes in the airflow direction of a bidirectional air-discharge air conditioner. Specifically, such filtration structures have two drawbacks: firstly, they can only filter airflow in one direction, making it difficult to cover the entire airflow path of the dual vents, resulting in some airflow entering the equipment directly without filtration; secondly, they are incompatible with the flow requirements of bidirectional airflow, causing a decrease in airflow efficiency and affecting the air conditioner's output capacity and temperature control effect.

[0027] Example 1 like Figures 1-4As shown, this application embodiment provides an indoor unit, including a housing 10, a fixed volute 20, a first filter assembly 30, a second filter assembly 40, and a switching assembly 50; the housing 10 includes a first air outlet 110 and a second air outlet 120 facing different directions; the fixed volute 20 is disposed within the housing 10, and the fixed volute 20 includes a first air duct outlet 210 and a second air duct outlet 220; the first filter assembly 30 is movably disposed at the first air outlet 110, and the first filter assembly 30 is configured to selectively cover or avoid the first air outlet 110; the second filter assembly 40 is disposed at the second air outlet 120, and the second filter assembly 40 includes a ventilation section 410 and a filter section 420 that are isolated from each other, so as to separate the second air outlet 120 into sections corresponding to the ventilation section 410. The indoor unit has an air outlet 420 and a return air outlet 420 corresponding to and connected to the filter unit 420; a switching component 50 is movably disposed on the fixed volute 20; the switching component 50 is configured to selectively open and close the first air duct outlet 210, the second air duct outlet 220, the return air outlet, and the air outlet; wherein, the indoor unit has a first air outlet state and a second air outlet state; in the first air outlet state, the switching component 50 opens the first air duct outlet 210 and closes the second air duct outlet 220, and opens the return air outlet and closes the air outlet, and the first filter component 30 avoids the first air outlet 110; in the second air outlet state, the switching component 50 closes the first air duct outlet 210 and opens the second air duct outlet 220, and closes the return air outlet and opens the air outlet, and the first filter component 30 covers the first air outlet 110.

[0028] As can be seen from the above, by selectively opening and closing the first air duct outlet 210, the second air duct outlet 220, the return air vent, and the air outlet through the switching component 50, and with the coordinated action of the first filter component 30, the indoor unit can switch between the first air outlet state and the second air outlet state. Specifically, in the first air outlet state, airflow is drawn in through the return air vent of the second air outlet 120 and blown out through the first air duct outlet 210 and the first air outlet 110, achieving directional air supply in the first direction. In the second air outlet state, airflow is drawn in through the first air outlet 110 and blown out through the air outlet of the second air duct outlet 220 and the second air outlet 120, achieving directional air supply in the second direction. Thus, the indoor unit can flexibly adjust the airflow direction and circulation path according to actual temperature control needs (such as cooling or heating), solving the problem of uneven indoor temperature distribution caused by a single air outlet direction, and effectively improving the overall temperature control effect and user comfort. Meanwhile, the second air outlet 120 is divided into an air outlet and a return air outlet by the second filter component 40, and on-demand filtration is achieved in conjunction with the movable setting of the first filter component 30. When airflow exits from the first air outlet 110 (first air outlet state), the first filter component 30 avoids the first air outlet 110, eliminating the obstruction of the airflow by the first filter component 30, ensuring the maximum effective flow area, and significantly reducing the airflow resistance to ensure strong airflow capacity and circulating air volume. When airflow enters from the first air outlet 110 (second air outlet state), the first filter component 30 covers the first air outlet 110 to ensure that the intake airflow is filtered and to ensure heat exchange efficiency, avoiding the problems associated with traditional fixed filters 44. The problem of excessive air resistance during air outlet is eliminated, achieving a perfect balance between smooth air outlet and clean air intake. Regardless of the air outlet state of the indoor unit, the air intake can be effectively filtered. In the first air outlet state, impurities are intercepted when the air enters through the filter section 420 (return air inlet) of the second filter component 40. In the second air outlet state, impurities are also intercepted when the air enters through the first filter component 30 covering the first air outlet 110. This effectively prevents dust, hair and other impurities from entering the air duct, heat exchanger 80 and fan and other core components inside the stator volute 20, avoiding the decrease in heat exchange efficiency, air duct blockage or fan failure caused by dust accumulation, thereby extending the service life of the air conditioner. In addition, this application uses the fixed volute 20 as the air duct foundation and integrates a second filter component 40 with a separation function at the second air outlet 120, so that the dual air outlet switching mechanism does not need to occupy too much extra space, and the structure is more compact than setting two independent air intake and exhaust systems.

[0029] It should be noted that the first air vent 110 and the second air vent 120 facing different directions refer to the first air vent 110 and the second air vent 120 facing different areas of the room or arranged at a specific angle. By guiding the airflow through differentiated orientation, a better indoor circulation path is formed, reducing dead air angles and allowing cold air (cooling mode) or hot air (heating mode) to diffuse more efficiently throughout the indoor space, thereby improving the overall temperature control effect.

[0030] It should also be noted that the indoor unit also includes centrifugal fan blades installed inside the fixed volute 20. The high-speed rotation of the centrifugal fan blades generates negative pressure, driving air to flow into the indoor unit from the return air inlet of the first air outlet 110 or the second air outlet 120. After filtration and heat exchange, the treated air is pushed to the first air duct outlet 210 or the second air duct outlet 220 of the fixed volute 20, and finally discharged into the room through the corresponding air outlet of the first air outlet 110 or the second air outlet 120, thereby realizing indoor air circulation and temperature regulation.

[0031] It should also be noted that the housing 10 has a cubic structure and includes an upper cover plate and a lower cover plate. The lower cover plate is provided with a second air vent 120. After the upper cover plate and the lower cover plate are assembled, they together form a first air vent 110.

[0032] Example 2 like Figures 1-4 As shown, this application embodiment provides an indoor unit, including a housing 10, a fixed volute 20, a first filter assembly 30, a second filter assembly 40, and a switching assembly 50; the housing 10 includes a first air outlet 110 and a second air outlet 120 facing different directions; the fixed volute 20 is disposed within the housing 10, and the fixed volute 20 includes a first air duct outlet 210 and a second air duct outlet 220; the first filter assembly 30 is movably disposed at the first air outlet 110, and the first filter assembly 30 is configured to selectively cover or avoid the first air outlet 110; the second filter assembly 40 is disposed at the second air outlet 120, and the second filter assembly 40 includes a ventilation section 410 and a filter section 420 that are isolated from each other, so as to separate the second air outlet 120 into sections corresponding to the ventilation section 410. The indoor unit has an air outlet 420 and a return air outlet 420 corresponding to and connected to the filter unit 420; a switching component 50 is movably disposed on the fixed volute 20; the switching component 50 is configured to selectively open and close the first air duct outlet 210, the second air duct outlet 220, the return air outlet, and the air outlet; wherein, the indoor unit has a first air outlet state and a second air outlet state; in the first air outlet state, the switching component 50 opens the first air duct outlet 210 and closes the second air duct outlet 220, and opens the return air outlet and closes the air outlet, and the first filter component 30 avoids the first air outlet 110; in the second air outlet state, the switching component 50 closes the first air duct outlet 210 and opens the second air duct outlet 220, and closes the return air outlet and opens the air outlet, and the first filter component 30 covers the first air outlet 110.

[0033] As can be seen from the above, by selectively opening and closing the first air duct outlet 210, the second air duct outlet 220, the return air vent, and the air outlet through the switching component 50, and with the coordinated action of the first filter component 30, the indoor unit can switch between the first air outlet state and the second air outlet state. Specifically, in the first air outlet state, airflow is drawn in through the return air vent of the second air outlet 120 and blown out through the first air duct outlet 210 and the first air outlet 110, achieving directional air supply in the first direction. In the second air outlet state, airflow is drawn in through the first air outlet 110 and blown out through the air outlet of the second air duct outlet 220 and the second air outlet 120, achieving directional air supply in the second direction. Thus, the indoor unit can flexibly adjust the airflow direction and circulation path according to actual temperature control needs (such as cooling or heating), solving the problem of uneven indoor temperature distribution caused by a single air outlet direction, and effectively improving the overall temperature control effect and user comfort. Meanwhile, the second air outlet 120 is divided into an air outlet and a return air outlet by the second filter component 40, and on-demand filtration is achieved in conjunction with the movable setting of the first filter component 30. When airflow exits from the first air outlet 110 (first air outlet state), the first filter component 30 avoids the first air outlet 110, eliminating the obstruction of the airflow by the first filter component 30, ensuring the maximum effective flow area, and significantly reducing the airflow resistance to ensure strong airflow capacity and circulating air volume. When airflow enters from the first air outlet 110 (second air outlet state), the first filter component 30 covers the first air outlet 110 to ensure that the intake airflow is filtered and to ensure heat exchange efficiency, avoiding the problems associated with traditional fixed filters 44. The problem of excessive air resistance during air outlet is eliminated, achieving a perfect balance between smooth air outlet and clean air intake. Regardless of the air outlet state of the indoor unit, the air intake can be effectively filtered. In the first air outlet state, impurities are intercepted when the air enters through the filter section 420 (return air inlet) of the second filter component 40. In the second air outlet state, impurities are also intercepted when the air enters through the first filter component 30 covering the first air outlet 110. This effectively prevents dust, hair and other impurities from entering the air duct, heat exchanger 80 and fan and other core components inside the stator volute 20, avoiding the decrease in heat exchange efficiency, air duct blockage or fan failure caused by dust accumulation, thereby extending the service life of the air conditioner. In addition, this application uses the fixed volute 20 as the air duct foundation and integrates a second filter component 40 with a separation function at the second air outlet 120, so that the dual air outlet switching mechanism does not need to occupy too much extra space, and the structure is more compact than setting two independent air intake and exhaust systems.

[0034] It should be noted that the first air vent 110 and the second air vent 120 facing different directions refer to the first air vent 110 and the second air vent 120 facing different areas of the room or arranged at a specific angle. By guiding the airflow through differentiated orientation, a better indoor circulation path is formed, reducing dead air angles and allowing cold air (cooling mode) or hot air (heating mode) to diffuse more efficiently throughout the indoor space, thereby improving the overall temperature control effect.

[0035] It should also be noted that the indoor unit also includes centrifugal fan blades installed inside the fixed volute 20. The high-speed rotation of the centrifugal fan blades generates negative pressure, driving air to flow into the indoor unit from the return air inlet of the first air outlet 110 or the second air outlet 120. After filtration and heat exchange, the treated air is pushed to the first air duct outlet 210 or the second air duct outlet 220 of the fixed volute 20, and finally discharged into the room through the corresponding air outlet of the first air outlet 110 or the second air outlet 120, thereby realizing indoor air circulation and temperature regulation.

[0036] It should also be noted that the housing 10 has a cubic structure and includes an upper cover plate and a lower cover plate. The lower cover plate is provided with a second air vent 120. After the upper cover plate and the lower cover plate are assembled, they together form a first air vent 110.

[0037] like Figures 1-5 As shown, in some embodiments, the switching component 50 includes a movable volute 510 and a baffle 520; the movable volute 510 is rotatably disposed within the fixed volute 20, and the movable volute 510 is configured to selectively open or close the first air duct outlet 210, the second air duct outlet 220, and the air outlet by rotation; the baffle 520 is connected to the movable volute 510 and located outside the fixed volute 20, and the baffle 520 is configured to rotate synchronously with the movable volute 510 to selectively open or close the return air inlet; wherein, in the first air outlet state, the movable volute 510 opens the first air duct outlet 210 and closes the second air duct outlet 220 and the air outlet, and the baffle 520 opens the return air inlet; in the second air outlet state, the movable volute 510 closes the first air duct outlet 210 and opens the second air duct outlet 220 and the air outlet, and the baffle 520 closes the return air inlet.

[0038] The movable volute 510 is rotatably mounted within the fixed volute 20, and can synchronously control the opening and closing of the first air duct outlet 210, the second air duct outlet 220, and the air outlet through a single rotation. In conjunction with the baffle 520, which is connected to the movable volute 510 and rotates synchronously, it controls the opening and closing of the return air vent. This eliminates the need for multiple independent drive mechanisms, significantly simplifying the overall structure of the switching component 50, reducing assembly difficulty and production costs, while also reducing the risk of component failure and improving stability. Furthermore, the synchronous linkage design of the movable volute 510 and the baffle 520 ensures precise synchronization of the opening and closing of each air duct outlet, air outlet, and return air vent when the indoor unit switches between the first and second air outlet states. This avoids problems such as airflow turbulence, air leakage, or mode switching failure caused by asynchronous actions of multiple components, ensuring the stability and reliability of the airflow path in both air outlet states, thereby guaranteeing the temperature control accuracy and operating efficiency of the indoor unit. Through the cooperation of the built-in moving volute 510 and the external baffle 520, the moving volute 510 precisely controls the airflow at each duct outlet and air outlet within the fixed volute 20, while the baffle 520 specifically controls the return air outlet outside the fixed volute 20. The two components have clear divisions of labor and do not interfere with each other, ensuring the compactness of the duct structure within the housing 10 without occupying additional internal space, while also achieving comprehensive control over each airflow channel, adapting to the airflow switching requirements of dual-outlet indoor units. Furthermore, the switching action is completed simply by rotating the moving volute 510, making operation simple and responsive.

[0039] It should be noted that, as Figure 1As shown, the fixed volute 20 includes a first fixed volute 230 and a second fixed volute 240. After the first fixed volute 230 and the second fixed volute 240 are assembled, they form a first air duct outlet 210 and a second air duct outlet 220. The first fixed volute 230 is disposed on the top wall of the housing 10 and one end is connected to the bottom wall of the housing 10. The second fixed volute 240 is disposed on the bottom wall of the housing 10 and one end overlaps with the water receiving tray 70.

[0040] It should also be noted that the moving volute 510 rotates around the center of the centrifugal fan; both the moving volute 510 and the baffle 520 are arc-shaped and arranged with their concave surfaces facing each other; furthermore, the moving volute 510 and the baffle 520 have an included angle in the circumferential direction, ensuring that the moving volute 510 and the baffle 520 are always located at different positions on the fixed volute 20 in the circumferential direction. Based on this, when the switching component 50 rotates to different angles, it can accurately switch the opening and closing of the air outlet and the return air outlet, ensuring the reliability of the airflow path switching.

[0041] It should also be noted that the indoor unit also includes a switching drive assembly, which is used to drive the switching assembly 50 to rotate. The switching drive assembly includes a motor and a gear transmission mechanism connected to the motor shaft. The specific structure and working principle of the switching drive assembly are existing technologies and will not be described in detail in this application.

[0042] It should also be noted that, such as Figure 5 As shown, the moving volute 510 has a first limiting part 5101 and a second limiting part 5102 protruding from both ends, and the fixed volute 20 has a limiting structure that cooperates with the first limiting part 5101 and the second limiting part 5102 respectively. In the first air outlet state and the second air outlet state, when the moving volute 510 rotates to the preset limiting position, it can abut against the limiting structure through the first limiting part 5101 and the second limiting part 5102 respectively.

[0043] like Figure 2 , Figure 4 , Figure 5 As shown, in some embodiments, there are multiple fixed volutes 20 arranged at intervals along the length of the housing 10, and each fixed volute 20 is provided with a movable volute 510; there are multiple baffles 520 arranged at intervals along the length; the multiple movable volutes 510 and the multiple baffles 520 are arranged alternately along the length; the second filter assembly 40 includes multiple ventilation sections 410 and multiple filter sections 420 arranged alternately along the length to divide the second air outlet 120 into multiple air outlets and multiple air return outlets arranged alternately along the length; wherein, the multiple baffles 520 correspond one-to-one with the multiple air return outlets, and the baffles 520 are configured to control the opening and closing of the corresponding air return outlets; the multiple movable volutes 510 correspond one-to-one with the multiple air outlets, and the movable volutes 510 are configured to control the opening and closing of the corresponding air outlets.

[0044] By alternating multiple air outlets and return air inlets along the length of the casing 10, the uneven heating and cooling and dead air zones caused by a single air outlet are resolved. This results in a wider air supply coverage and a more uniform return air intake, promoting rapid and even air circulation throughout the room, significantly reducing temperature differences and improving comfort. Each independent return air inlet has its corresponding filter 420, physically isolated from adjacent air outlets, ensuring that the drawn-in air is fully filtered before entering the duct. The parallel structure of multiple filter units 420 also increases the total filtration area, reduces wind resistance, improves efficiency, and more thoroughly protects the heat exchanger 80 and fan system from dust contamination, maintaining long-term, efficient, and stable operation of the equipment. Furthermore, each moving volute 510 controls one air outlet, and each baffle 520 controls one return air inlet. The moving volute 510 and baffle 520 are mechanically linked, achieving precise one-to-one control. This ensures the synchronicity and consistency of air outlet switching along the entire length, preventing localized leaks or airflow short circuits.

[0045] It should be noted that, as Figure 2 As shown, the length direction is parallel to the X direction, the width direction is parallel to the Y direction, and the height direction is parallel to the Z direction.

[0046] It should also be noted that the lengths of the multiple baffles 520 can be the same or different, and can be selected according to the length of the housing 10; in addition, the multiple ventilation sections 410 correspond one-to-one with the multiple air outlets, and the multiple filter sections 420 correspond one-to-one with the multiple return air inlets; such as Figure 2 , Figure 4 , Figure 5 As shown, there are three fixed volutes 20, three moving volutes 510, and three air outlets; and four baffles 520 and four return air outlets, with the four baffles 520 having different lengths.

[0047] like Figure 1 , Figure 3 As shown, in some embodiments, the first air duct outlet 210 faces and is connected to the first air inlet 110, and the second air duct outlet 220 faces and is connected to the second air inlet 120.

[0048] By aligning the first air duct outlet 210 with the first air outlet 110 and connecting it, and aligning the second air duct outlet 220 with the second air outlet 120 and connecting it with the air outlet, two independent airflow delivery paths are formed. This reduces the detour and backflow of airflow within the housing 10, lowers airflow resistance within the duct, and achieves physical isolation between the two air ducts. This prevents airflow from flowing across the housing 10 under different airflow conditions, providing a reliable structural foundation for stable switching between the two airflow conditions. At the same time, the orientation matching design of the air duct outlet and the corresponding air outlet allows the airflow to be accurately delivered to the target area along a preset direction, enhancing the directionality of air supply, further optimizing indoor airflow organization, and helping to improve temperature control uniformity and user comfort. In addition, the second air duct outlet 220 is oriented towards the second air outlet 120 and connected to the air outlet, which provides a basis for the moving volute 510 to synchronously control the opening and closing of the second air duct outlet 220 and the air outlet. This allows the moving volute 510 to simultaneously open and close the second air duct outlet 220 and the air outlet with a single rotation, without the need for independent drive and control design for the two.

[0049] like Figure 6 As shown, in some embodiments, the second filter assembly 40 includes a frame 430, which includes a plurality of return air grilles 4301 and outlet air grilles 4302 arranged alternately along the length direction; wherein, the return air grilles 4301 are provided with filters 440 to form a filter section 420; and the outlet air grilles 4302 are open to form a ventilation section 410.

[0050] The frame 430, by alternately arranging return air grilles 4301 and outlet air grilles 4302, simultaneously achieves return air filtration and outlet airflow guidance functions within the same component. This eliminates the need for separate return air and outlet air components, significantly simplifying the second filter component 40 and the overall structure of the indoor unit, reducing the number of components and assembly complexity. The differentiated design of the return air grille 4301 with its filter 440 and the open outlet air grille 4302 precisely divides the filtration section 420 and the ventilation section 410. This ensures that the return airflow is effectively filtered when passing through the return air grille 4301, intercepting dust and impurities to protect the core components of the indoor unit. Simultaneously, it ensures that the outlet airflow is unobstructed by the filter 440 when flowing through the open outlet air grille 4302, significantly reducing airflow resistance, avoiding airflow loss, and balancing air purification effect and airflow efficiency. The alternating grille structure along the length direction can form a precise one-to-one matching relationship with the air outlets, return air outlets, and corresponding moving volutes 510 and baffles 520 distributed along the length direction of the indoor unit. This ensures that each air outlet corresponds to an open air outlet grille 4302 and each return air outlet corresponds to a return air grille 4301 with a filter 440, thereby achieving precise zoned control of filtration and air outlet functions, effectively avoiding airflow crosstalk between different functional areas, and ensuring the stability of the airflow path.

[0051] like Figure 1 , Figure 3 As shown, in some embodiments, the first filter assembly 30 includes an upper filter element 310 and a lower filter element 320. Both the upper filter element 310 and the lower filter element 320 include an adapter end and a free end. The adapter end is rotatably disposed on the housing 10. In the first air outlet state, the free ends of the upper filter element 310 and the lower filter element 320 are far apart from each other to avoid the first air outlet 110. In the second air outlet state, the free ends of the upper filter element 310 and the lower filter element 320 are engaged with each other to cover the first air outlet 110.

[0052] By rotating the upper filter element 310 and the lower filter element 320, they can accurately coordinate with the first and second air outlet states of the indoor unit. In the first air outlet state, they avoid the first air vent 110 to reduce airflow resistance; in the second air outlet state, they cover the first air vent 110 to achieve filtration. This solves the problem that existing filter structures cannot adapt to the air outlet switching of bidirectional air duct units. Through the structure of the rotating adapter end engaging and separating with the free end, the first air vent 110 can be completely covered or completely avoided. When covered, there are no gaps for airflow leakage, ensuring complete filtration of the incoming air; at the same time, when avoiding, there are no parts obstructing the airflow, ensuring smooth airflow from the first air vent 110 and improving airflow efficiency. In addition, the upper filter element 310 and the lower filter element 320 adopt a split rotating design, which can fit against the inner wall of the housing 10 when avoiding the first air vent 110, without occupying too much additional installation space. This is compatible with the layout of components such as the heat exchanger 80 and the volute inside the indoor unit, further optimizing the overall spatial structure.

[0053] It should be noted that, as Figure 1 , Figure 4 As shown, the rotation axes of the upper filter element 310 and the lower filter element 320 are parallel to the X direction; in addition, the rotation axes of the upper filter element 310 and the lower filter element 320 can have a gap in the Y direction to be compatible with the layout of components such as the heat exchanger 80 and the volute inside the indoor unit, while saving internal space as much as possible.

[0054] It should also be noted that the free ends of the upper filter element 310 and the lower filter element 320 are provided with an overlapping structure to prevent gaps between the free ends of the upper filter element 310 and the lower filter element 320 in the first air outlet state, thus preventing unfiltered airflow from directly entering through the gaps; for example, as Figure 3 As shown, the overlapping structure includes an overlapping notch disposed at the free end of the upper filter element 310 and an overlapping plate disposed at the free end of the lower filter element 320, with the overlapping notch abutting against the overlapping plate.

[0055] like Figure 1 , Figure 3As shown, in some embodiments, the first air vent 110 is located on the side wall of the housing 10, and the second air vent 120 is located on the bottom wall of the housing 10; the indoor unit also includes a mounting base 60 and a water tray 70; the mounting base 60 is disposed on the top wall of the housing 10; the water tray 70 is disposed on the bottom wall of the housing 10; wherein, the adapter end of the upper filter 310 is rotatably disposed on the mounting base 60, and the adapter end of the lower filter 320 is rotatably disposed on the water tray 70.

[0056] By placing the first air vent 110 on the side wall of the housing 10 and the second air vent 120 on the bottom wall of the housing 10, and coordinating the layout of the mounting base 60 on the top wall and the water collection tray 70 on the bottom wall, the three-dimensional space of the housing 10 is fully utilized, avoiding interference with components such as the heat exchanger 80 and the volute. This also allows the airflow path to better suit indoor temperature control requirements and improves airflow uniformity. The mounting base 60 and the water collection tray 70, respectively, install the first and second filter elements, ensuring their stability during rotation and preventing loosening, shifting, or deformation over long-term use. Furthermore, when the upper filter element 310 and the lower filter element 320 are joined to cover the first air vent 110, their upper and lower gaps are blocked by the upper cover plate and the water collection tray 70, forming a closed filtration channel. This ensures that airflow can only enter through the upper filter element 310 and the lower filter element 320, preventing unfiltered airflow from seeping in through gaps and improving filtration reliability and air purification effect.

[0057] It should be noted that the indoor unit also includes an upper filter drive assembly and a lower filter drive assembly. The upper filter drive assembly is used to drive the upper filter element 310 to rotate, and the lower filter drive assembly is used to drive the lower filter element 320 to rotate. Both the upper filter drive assembly and the lower filter drive assembly include a motor and a gear transmission mechanism connected to the motor shaft. The specific structure and working principle of the upper filter drive assembly and the lower filter drive assembly are existing technologies and will not be described in detail in this application. Of course, the upper filter drive assembly and the lower filter drive assembly can also adopt other transmission mechanisms to achieve rotation, and this application does not make specific limitations.

[0058] It should also be noted that, such as Figure 1 , Figure 3 As shown, the transition ends of the upper filter element 310 and the lower filter element 320 are both arc-shaped, and the mounting base 60 and the water receiving tray 70 are provided with arc-shaped grooves that match their shapes; in addition, the transition end of the upper filter element 310 is provided with an upper positioning member, and the transition end of the lower filter element 320 is provided with a lower positioning member; in the second air outlet state, the upper filter element 310 rotates until the upper positioning member abuts against the mounting base 60, and the lower filter element 320 rotates until the lower positioning member abuts against the water receiving tray 70.

[0059] Example 3 like Figures 1-4As shown, this application embodiment provides an indoor unit, including a housing 10, a fixed volute 20, a first filter assembly 30, a second filter assembly 40, and a switching assembly 50; the housing 10 includes a first air outlet 110 and a second air outlet 120 facing different directions; the fixed volute 20 is disposed within the housing 10, and the fixed volute 20 includes a first air duct outlet 210 and a second air duct outlet 220; the first filter assembly 30 is movably disposed at the first air outlet 110, and the first filter assembly 30 is configured to selectively cover or avoid the first air outlet 110; the second filter assembly 40 is disposed at the second air outlet 120, and the second filter assembly 40 includes a ventilation section 410 and a filter section 420 that are isolated from each other, so as to separate the second air outlet 120 into sections corresponding to the ventilation section 410. The indoor unit has an air outlet 420 and a return air outlet 420 corresponding to and connected to the filter unit 420; a switching component 50 is movably disposed on the fixed volute 20; the switching component 50 is configured to selectively open and close the first air duct outlet 210, the second air duct outlet 220, the return air outlet, and the air outlet; wherein, the indoor unit has a first air outlet state and a second air outlet state; in the first air outlet state, the switching component 50 opens the first air duct outlet 210 and closes the second air duct outlet 220, and opens the return air outlet and closes the air outlet, and the first filter component 30 avoids the first air outlet 110; in the second air outlet state, the switching component 50 closes the first air duct outlet 210 and opens the second air duct outlet 220, and closes the return air outlet and opens the air outlet, and the first filter component 30 covers the first air outlet 110.

[0060] As can be seen from the above, by selectively opening and closing the first air duct outlet 210, the second air duct outlet 220, the return air vent, and the air outlet through the switching component 50, and with the coordinated action of the first filter component 30, the indoor unit can switch between the first air outlet state and the second air outlet state. Specifically, in the first air outlet state, airflow is drawn in through the return air vent of the second air outlet 120 and blown out through the first air duct outlet 210 and the first air outlet 110, achieving directional air supply in the first direction. In the second air outlet state, airflow is drawn in through the first air outlet 110 and blown out through the air outlet of the second air duct outlet 220 and the second air outlet 120, achieving directional air supply in the second direction. Thus, the indoor unit can flexibly adjust the airflow direction and circulation path according to actual temperature control needs (such as cooling or heating), solving the problem of uneven indoor temperature distribution caused by a single air outlet direction, and effectively improving the overall temperature control effect and user comfort. Meanwhile, the second air outlet 120 is divided into an air outlet and a return air outlet by the second filter component 40, and on-demand filtration is achieved in conjunction with the movable setting of the first filter component 30. When airflow exits from the first air outlet 110 (first air outlet state), the first filter component 30 avoids the first air outlet 110, eliminating the obstruction of the airflow by the first filter component 30, ensuring the maximum effective flow area, and significantly reducing the airflow resistance to ensure strong airflow capacity and circulating air volume. When airflow enters from the first air outlet 110 (second air outlet state), the first filter component 30 covers the first air outlet 110 to ensure that the intake airflow is filtered and to ensure heat exchange efficiency, avoiding the problems associated with traditional fixed filters 44. The problem of excessive air resistance during air outlet is eliminated, achieving a perfect balance between smooth air outlet and clean air intake. Regardless of the air outlet state of the indoor unit, the air intake can be effectively filtered. In the first air outlet state, impurities are intercepted when the air enters through the filter section 420 (return air inlet) of the second filter component 40. In the second air outlet state, impurities are also intercepted when the air enters through the first filter component 30 covering the first air outlet 110. This effectively prevents dust, hair and other impurities from entering the air duct, heat exchanger 80 and fan and other core components inside the stator volute 20, avoiding the decrease in heat exchange efficiency, air duct blockage or fan failure caused by dust accumulation, thereby extending the service life of the air conditioner. In addition, this application uses the fixed volute 20 as the air duct foundation and integrates a second filter component 40 with a separation function at the second air outlet 120, so that the dual air outlet switching mechanism does not need to occupy too much extra space, and the structure is more compact than setting two independent air intake and exhaust systems.

[0061] It should be noted that the first air vent 110 and the second air vent 120 facing different directions refer to the first air vent 110 and the second air vent 120 facing different areas of the room or arranged at a specific angle. By guiding the airflow through differentiated orientation, a better indoor circulation path is formed, reducing dead air angles and allowing cold air (cooling mode) or hot air (heating mode) to diffuse more efficiently throughout the indoor space, thereby improving the overall temperature control effect.

[0062] It should also be noted that the indoor unit also includes centrifugal fan blades installed inside the fixed volute 20. The high-speed rotation of the centrifugal fan blades generates negative pressure, driving air to flow into the indoor unit from the return air inlet of the first air outlet 110 or the second air outlet 120. After filtration and heat exchange, the treated air is pushed to the first air duct outlet 210 or the second air duct outlet 220 of the fixed volute 20, and finally discharged into the room through the corresponding air outlet of the first air outlet 110 or the second air outlet 120, thereby realizing indoor air circulation and temperature regulation.

[0063] It should also be noted that the housing 10 has a cubic structure and includes an upper cover plate and a lower cover plate. The lower cover plate is provided with a second air vent 120. After the upper cover plate and the lower cover plate are assembled, they together form a first air vent 110.

[0064] like Figures 1-5 As shown, in some embodiments, the switching component 50 includes a movable volute 510 and a baffle 520; the movable volute 510 is rotatably disposed within the fixed volute 20, and the movable volute 510 is configured to selectively open or close the first air duct outlet 210, the second air duct outlet 220, and the air outlet by rotation; the baffle 520 is connected to the movable volute 510 and located outside the fixed volute 20, and the baffle 520 is configured to rotate synchronously with the movable volute 510 to selectively open or close the return air inlet; wherein, in the first air outlet state, the movable volute 510 opens the first air duct outlet 210 and closes the second air duct outlet 220 and the air outlet, and the baffle 520 opens the return air inlet; in the second air outlet state, the movable volute 510 closes the first air duct outlet 210 and opens the second air duct outlet 220 and the air outlet, and the baffle 520 closes the return air inlet.

[0065] The movable volute 510 is rotatably mounted within the fixed volute 20, and can synchronously control the opening and closing of the first air duct outlet 210, the second air duct outlet 220, and the air outlet through a single rotation. In conjunction with the baffle 520, which is connected to the movable volute 510 and rotates synchronously, it controls the opening and closing of the return air vent. This eliminates the need for multiple independent drive mechanisms, significantly simplifying the overall structure of the switching component 50, reducing assembly difficulty and production costs, while also reducing the risk of component failure and improving stability. Furthermore, the synchronous linkage design of the movable volute 510 and the baffle 520 ensures precise synchronization of the opening and closing of each air duct outlet, air outlet, and return air vent when the indoor unit switches between the first and second air outlet states. This avoids problems such as airflow turbulence, air leakage, or mode switching failure caused by asynchronous actions of multiple components, ensuring the stability and reliability of the airflow path in both air outlet states, thereby guaranteeing the temperature control accuracy and operating efficiency of the indoor unit. Through the cooperation of the built-in moving volute 510 and the external baffle 520, the moving volute 510 precisely controls the airflow at each duct outlet and air outlet within the fixed volute 20, while the baffle 520 specifically controls the return air outlet outside the fixed volute 20. The two components have clear divisions of labor and do not interfere with each other, ensuring the compactness of the duct structure within the housing 10 without occupying additional internal space, while also achieving comprehensive control over each airflow channel, adapting to the airflow switching requirements of dual-outlet indoor units. Furthermore, the switching action is completed simply by rotating the moving volute 510, making operation simple and responsive.

[0066] It should be noted that, as Figure 1As shown, the fixed volute 20 includes a first fixed volute 230 and a second fixed volute 240. After the first fixed volute 230 and the second fixed volute 240 are assembled, they form a first air duct outlet 210 and a second air duct outlet 220. The first fixed volute 230 is disposed on the top wall of the housing 10 and one end is connected to the bottom wall of the housing 10. The second fixed volute 240 is disposed on the bottom wall of the housing 10 and one end overlaps with the water receiving tray 70.

[0067] It should also be noted that the moving volute 510 rotates around the center of the centrifugal fan; both the moving volute 510 and the baffle 520 are arc-shaped and arranged with their concave surfaces facing each other; furthermore, the moving volute 510 and the baffle 520 have an included angle in the circumferential direction, ensuring that the moving volute 510 and the baffle 520 are always located at different positions on the fixed volute 20 in the circumferential direction. Based on this, when the switching component 50 rotates to different angles, it can accurately switch the opening and closing of the air outlet and the return air outlet, ensuring the reliability of the airflow path switching.

[0068] It should also be noted that the indoor unit also includes a switching drive assembly, which is used to drive the switching assembly 50 to rotate. The switching drive assembly includes a motor and a gear transmission mechanism connected to the motor shaft. The specific structure and working principle of the switching drive assembly are existing technologies and will not be described in detail in this application.

[0069] It should also be noted that, such as Figure 5 As shown, the moving volute 510 has a first limiting part 5101 and a second limiting part 5102 protruding from both ends, and the fixed volute 20 has a limiting structure that cooperates with the first limiting part 5101 and the second limiting part 5102 respectively. In the first air outlet state and the second air outlet state, when the moving volute 510 rotates to the preset limiting position, it can abut against the limiting structure through the first limiting part 5101 and the second limiting part 5102 respectively.

[0070] like Figure 2 , Figure 4 , Figure 5 As shown, in some embodiments, there are multiple fixed volutes 20 arranged at intervals along the length of the housing 10, and each fixed volute 20 is provided with a movable volute 510; there are multiple baffles 520 arranged at intervals along the length; the multiple movable volutes 510 and the multiple baffles 520 are arranged alternately along the length; the second filter assembly 40 includes multiple ventilation sections 410 and multiple filter sections 420 arranged alternately along the length to divide the second air outlet 120 into multiple air outlets and multiple air return outlets arranged alternately along the length; wherein, the multiple baffles 520 correspond one-to-one with the multiple air return outlets, and the baffles 520 are configured to control the opening and closing of the corresponding air return outlets; the multiple movable volutes 510 correspond one-to-one with the multiple air outlets, and the movable volutes 510 are configured to control the opening and closing of the corresponding air outlets.

[0071] By alternating multiple air outlets and return air inlets along the length of the casing 10, the uneven heating and cooling and dead air zones caused by a single air outlet are resolved. This results in a wider air supply coverage and a more uniform return air intake, promoting rapid and even air circulation throughout the room, significantly reducing temperature differences and improving comfort. Each independent return air inlet has its corresponding filter 420, physically isolated from adjacent air outlets, ensuring that the drawn-in air is fully filtered before entering the duct. The parallel structure of multiple filter units 420 also increases the total filtration area, reduces wind resistance, improves efficiency, and more thoroughly protects the heat exchanger 80 and fan system from dust contamination, maintaining long-term, efficient, and stable operation of the equipment. Furthermore, each moving volute 510 controls one air outlet, and each baffle 520 controls one return air inlet. The moving volute 510 and baffle 520 are mechanically linked, achieving precise one-to-one control. This ensures the synchronicity and consistency of air outlet switching along the entire length, preventing localized leaks or airflow short circuits.

[0072] It should be noted that, as Figure 2 As shown, the length direction is parallel to the X direction, the width direction is parallel to the Y direction, and the height direction is parallel to the Z direction.

[0073] It should also be noted that the lengths of the multiple baffles 520 can be the same or different, and can be selected according to the length of the housing 10; in addition, the multiple ventilation sections 410 correspond one-to-one with the multiple air outlets, and the multiple filter sections 420 correspond one-to-one with the multiple return air inlets; such as Figure 2 , Figure 4 , Figure 5 As shown, there are three fixed volutes 20, three moving volutes 510, and three air outlets; and four baffles 520 and four return air outlets, with the four baffles 520 having different lengths.

[0074] like Figure 1 , Figure 3 As shown, in some embodiments, the first air duct outlet 210 faces and is connected to the first air inlet 110, and the second air duct outlet 220 faces and is connected to the second air inlet 120.

[0075] By aligning the first air duct outlet 210 with the first air outlet 110 and connecting it, and aligning the second air duct outlet 220 with the second air outlet 120 and connecting it with the air outlet, two independent airflow delivery paths are formed. This reduces the detour and backflow of airflow within the housing 10, lowers airflow resistance within the duct, and achieves physical isolation between the two air ducts. This prevents airflow from flowing across the housing 10 under different airflow conditions, providing a reliable structural foundation for stable switching between the two airflow conditions. At the same time, the orientation matching design of the air duct outlet and the corresponding air outlet allows the airflow to be accurately delivered to the target area along a preset direction, enhancing the directionality of air supply, further optimizing indoor airflow organization, and helping to improve temperature control uniformity and user comfort. In addition, the second air duct outlet 220 is oriented towards the second air outlet 120 and connected to the air outlet, which provides a basis for the moving volute 510 to synchronously control the opening and closing of the second air duct outlet 220 and the air outlet. This allows the moving volute 510 to simultaneously open and close the second air duct outlet 220 and the air outlet with a single rotation, without the need for independent drive and control design for the two.

[0076] like Figure 6 As shown, in some embodiments, the second filter assembly 40 includes a frame 430, which includes a plurality of return air grilles 4301 and outlet air grilles 4302 arranged alternately along the length direction; wherein, the return air grilles 4301 are provided with filters 440 to form a filter section 420; and the outlet air grilles 4302 are open to form a ventilation section 410.

[0077] The frame 430, by alternately arranging return air grilles 4301 and outlet air grilles 4302, simultaneously achieves return air filtration and outlet airflow guidance functions within the same component. This eliminates the need for separate return air and outlet air components, significantly simplifying the second filter component 40 and the overall structure of the indoor unit, reducing the number of components and assembly complexity. The differentiated design of the return air grille 4301 with its filter 440 and the open outlet air grille 4302 precisely divides the filtration section 420 and the ventilation section 410. This ensures that the return airflow is effectively filtered when passing through the return air grille 4301, intercepting dust and impurities to protect the core components of the indoor unit. Simultaneously, it ensures that the outlet airflow is unobstructed by the filter 440 when flowing through the open outlet air grille 4302, significantly reducing airflow resistance, avoiding airflow loss, and balancing air purification effect and airflow efficiency. The alternating grille structure along the length direction can form a precise one-to-one matching relationship with the air outlets, return air outlets, and corresponding moving volutes 510 and baffles 520 distributed along the length direction of the indoor unit. This ensures that each air outlet corresponds to an open air outlet grille 4302 and each return air outlet corresponds to a return air grille 4301 with a filter 440, thereby achieving precise zoned control of filtration and air outlet functions, effectively avoiding airflow crosstalk between different functional areas, and ensuring the stability of the airflow path.

[0078] like Figure 1 , Figure 3 As shown, in some embodiments, the first filter assembly 30 includes an upper filter element 310 and a lower filter element 320. Both the upper filter element 310 and the lower filter element 320 include an adapter end and a free end. The adapter end is rotatably disposed on the housing 10. In the first air outlet state, the free ends of the upper filter element 310 and the lower filter element 320 are far apart from each other to avoid the first air outlet 110. In the second air outlet state, the free ends of the upper filter element 310 and the lower filter element 320 are engaged with each other to cover the first air outlet 110.

[0079] By rotating the upper filter element 310 and the lower filter element 320, they can accurately coordinate with the first and second air outlet states of the indoor unit. In the first air outlet state, they avoid the first air vent 110 to reduce airflow resistance; in the second air outlet state, they cover the first air vent 110 to achieve filtration. This solves the problem that existing filter structures cannot adapt to the air outlet switching of bidirectional air duct units. Through the structure of the rotating adapter end engaging and separating with the free end, the first air vent 110 can be completely covered or completely avoided. When covered, there are no gaps for airflow leakage, ensuring complete filtration of the incoming air; at the same time, when avoiding, there are no parts obstructing the airflow, ensuring smooth airflow from the first air vent 110 and improving airflow efficiency. In addition, the upper filter element 310 and the lower filter element 320 adopt a split rotating design, which can fit against the inner wall of the housing 10 when avoiding the first air vent 110, without occupying too much additional installation space. This is compatible with the layout of components such as the heat exchanger 80 and the volute inside the indoor unit, further optimizing the overall spatial structure.

[0080] It should be noted that, as Figure 1 , Figure 4 As shown, the rotation axes of the upper filter element 310 and the lower filter element 320 are parallel to the X direction; in addition, the rotation axes of the upper filter element 310 and the lower filter element 320 can have a gap in the Y direction to be compatible with the layout of components such as the heat exchanger 80 and the volute inside the indoor unit, while saving internal space as much as possible.

[0081] It should also be noted that the free ends of the upper filter element 310 and the lower filter element 320 are provided with an overlapping structure to prevent gaps between the free ends of the upper filter element 310 and the lower filter element 320 in the first air outlet state, thus preventing unfiltered airflow from directly entering through the gaps; for example, as Figure 3 As shown, the overlapping structure includes an overlapping notch disposed at the free end of the upper filter element 310 and an overlapping plate disposed at the free end of the lower filter element 320, with the overlapping notch abutting against the overlapping plate.

[0082] like Figure 1 , Figure 3As shown, in some embodiments, the first air vent 110 is located on the side wall of the housing 10, and the second air vent 120 is located on the bottom wall of the housing 10; the indoor unit also includes a mounting base 60 and a water tray 70; the mounting base 60 is disposed on the top wall of the housing 10; the water tray 70 is disposed on the bottom wall of the housing 10; wherein, the adapter end of the upper filter 310 is rotatably disposed on the mounting base 60, and the adapter end of the lower filter 320 is rotatably disposed on the water tray 70.

[0083] By placing the first air vent 110 on the side wall of the housing 10 and the second air vent 120 on the bottom wall of the housing 10, and coordinating the layout of the mounting base 60 on the top wall and the water collection tray 70 on the bottom wall, the three-dimensional space of the housing 10 is fully utilized, avoiding interference with components such as the heat exchanger 80 and the volute. This also allows the airflow path to better suit indoor temperature control requirements and improves airflow uniformity. The mounting base 60 and the water collection tray 70, respectively, install the first and second filter elements, ensuring their stability during rotation and preventing loosening, shifting, or deformation over long-term use. Furthermore, when the upper filter element 310 and the lower filter element 320 are joined to cover the first air vent 110, their upper and lower gaps are blocked by the upper cover plate and the water collection tray 70, forming a closed filtration channel. This ensures that airflow can only enter through the upper filter element 310 and the lower filter element 320, preventing unfiltered airflow from seeping in through gaps and improving filtration reliability and air purification effect.

[0084] It should be noted that the indoor unit also includes an upper filter drive assembly and a lower filter drive assembly. The upper filter drive assembly is used to drive the upper filter element 310 to rotate, and the lower filter drive assembly is used to drive the lower filter element 320 to rotate. Both the upper filter drive assembly and the lower filter drive assembly include a motor and a gear transmission mechanism connected to the motor shaft. The specific structure and working principle of the upper filter drive assembly and the lower filter drive assembly are existing technologies and will not be described in detail in this application. Of course, the upper filter drive assembly and the lower filter drive assembly can also adopt other transmission mechanisms to achieve rotation, and this application does not make specific limitations.

[0085] It should also be noted that, such as Figure 1 , Figure 3 As shown, the transition ends of the upper filter element 310 and the lower filter element 320 are both arc-shaped, and the mounting base 60 and the water receiving tray 70 are provided with arc-shaped grooves that match their shapes; in addition, the transition end of the upper filter element 310 is provided with an upper positioning member, and the transition end of the lower filter element 320 is provided with a lower positioning member; in the second air outlet state, the upper filter element 310 rotates until the upper positioning member abuts against the mounting base 60, and the lower filter element 320 rotates until the lower positioning member abuts against the water receiving tray 70.

[0086] like Figure 7As shown, in some embodiments, the indoor unit also includes a heat exchanger 80 disposed within the housing 10, the heat exchanger 80 being located between the first filter assembly 30 and the fixed volute 20; wherein, the side of the heat exchanger 80 facing the first air outlet 110 has a preset distance from the first air outlet 110.

[0087] By placing the heat exchanger 80 between the first filter assembly 30 and the fixed volute 20, a filtration-heat exchange-air supply airflow path is formed. The clean airflow filtered by the first filter assembly 30 flows directly through the heat exchanger 80, reducing impurities adhering to the surface of the heat exchanger 80 and preventing a decrease in heat exchange efficiency. A preset distance is maintained between the heat exchanger 80 and the first air outlet 110 to prevent congestion and eddies when the airflow enters due to excessive proximity, ensuring smooth airflow through the heat exchanger 80 and balancing heat exchange effect and airflow efficiency. Furthermore, the layout of the heat exchanger 80 is highly compatible with the structural design of the fixed volute 20 and the moving volute 510. It does not occupy the installation space of the air duct switching mechanism, nor does it obstruct the rotation of the moving volute 510, ensuring that the function of the moving volute 510 in simultaneously controlling the opening and closing of the first air duct outlet 210, the second air duct outlet 220, and the air outlet through a single rotation remains unaffected.

[0088] It should be noted that, as Figure 7 As shown, the preset spacing is L.

[0089] In some embodiments, the preset spacing is 70mm to 100mm.

[0090] By limiting the preset spacing to 70mm to 100mm, airflow and heat exchange efficiency can be guaranteed, while providing sufficient space for movable parts such as the first filter component 30. This avoids the problem of the preset spacing being too small, which would cause airflow congestion, generate eddies, and increase wind resistance. It also avoids the problem of the preset spacing being too large, which would cause airflow loss or an excessively large heat exchange path, resulting in reduced heat exchange efficiency and occupying space in the housing 10.

[0091] like Figure 1 , Figure 3 As shown, in some embodiments, the heat exchanger 80 includes an upper heat exchanger 810 and a lower heat exchanger 820 arranged sequentially in the height direction of the housing 10; the upper heat exchanger 810 has a first angle with the housing 10 in the width direction, and in the width direction, the distance between the end of the upper heat exchanger 810 away from the lower heat exchanger 820 and the first air outlet 110 is greater than the distance between the end of the upper heat exchanger 810 near the lower heat exchanger 820 and the first air outlet 110; the lower heat exchanger 820 has a second angle with the width direction, and in the width direction, the distance between the end of the lower heat exchanger 820 away from the upper heat exchanger 810 and the first air outlet 110 is greater than the distance between the end of the lower heat exchanger 820 near the upper heat exchanger 810 and the first air outlet 110; wherein, the first angle is smaller than the second angle.

[0092] By limiting the distance between the upper heat exchanger 810 and the first air outlet 110, and the distance between the lower heat exchanger 820 and the first air outlet 110, an inclined arrangement with the outer end farther and the inner end closer is formed. This allows the airflow entering from the first air outlet 110 to be evenly diffused to the entire surface of the heat exchanger 80, avoiding local airflow concentration or dead corners and improving heat exchange efficiency. At the same time, the upper and lower heat exchangers 820 are arranged in layers along the height direction of the shell 10. Combined with the inclined design with different included angles, the three-dimensional space inside the shell 10 can be fully utilized, avoiding interference with components such as filter components and volutes. Moreover, the inclined structure can reduce the obstruction of the first air outlet 110 and ensure smooth airflow. By limiting the first included angle to be smaller than the second included angle, the relatively smaller first included angle provides installation space for the first filter screen 440 component, while the relatively larger second included angle ensures heat exchange. Furthermore, it allows for precise matching of heat exchange requirements based on the airflow intensity differences between the upper and lower regions—the upper airflow is relatively weaker, so a smaller included angle reduces airflow resistance; the lower airflow is relatively concentrated, so a larger included angle enhances airflow diffusion and heat exchange contact, achieving an optimized balance in the overall heat exchange effect. This allows the evenly diffused airflow to achieve a more balanced temperature distribution after stratified heat exchange through the upper and lower heat exchange components 820, resulting in a more stable exhaust airflow temperature. This effectively avoids excessive local temperature differences in the room, improving user comfort. Additionally, the tilted arrangement of the heat exchange components guides condensate along the surface to the drip tray 70, preventing condensate accumulation or dripping onto other components, reducing corrosion and mold problems caused by water accumulation, and extending the service life of the heat exchanger 80 and the entire unit.

[0093] It should be noted that, as Figure 7 As shown, the first included angle is α, and the second included angle is β.

[0094] In some embodiments, the first included angle is 30° to 45° and the second included angle is 70° to 85°.

[0095] Setting a first angle of 30°-45° reduces resistance to the weaker airflow above, ensuring smooth flow, while preventing insufficient flaring due to an excessively small angle, thus ensuring uniform airflow diffusion to the upper heat exchange area. A second angle of 70°-85° efficiently flares and guides the concentrated airflow below, enhancing the contact area between the airflow and the lower heat exchange components, while avoiding airflow turbulence or increased resistance due to an excessively large angle, achieving a precise balance between upper and lower heat exchange efficiency. Furthermore, this angle range is highly compatible with the internal space of most indoor unit housings 10, ensuring heat exchange performance while avoiding interference with surrounding components such as filter components and drip trays 70. It also meets industry-standard processing precision requirements, enabling mass production without special molds, which helps control production costs and improve product versatility and stability.

[0096] It should be noted that the angle (α+β) between the upper heat exchanger 80 and the lower heat exchanger 80 should be as large as possible to improve airflow distribution, reduce air resistance, and increase heat exchange capacity; for example, the angle between the upper heat exchanger 80 and the lower heat exchanger 80 is 130°.

[0097] Example 4 This application also provides an air conditioner, including the indoor unit provided in the foregoing embodiments of this application.

[0098] It should be noted that the indoor unit can be, but is not limited to, a ducted air conditioner.

[0099] 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.

[0100] 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.

[0101] 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. An indoor unit, characterized in that, include: The casing includes a first air vent and a second air vent facing different directions; A fixed volute is disposed within the housing, and the fixed volute includes a first air duct outlet and a second air duct outlet; A first filter component is movably disposed at the first air outlet, and the first filter component is configured to selectively cover or avoid the first air outlet. The second filter assembly is disposed at the second air outlet. The second filter assembly includes a ventilation section and a filter section that are isolated from each other, so as to divide the second air outlet into an air outlet that corresponds to and communicates with the ventilation section and an air return outlet that corresponds to and communicates with the filter section. A switching component is movably disposed on the fixed volute; the switching component is configured to selectively open and close the first air duct outlet, the second air duct outlet, the return air inlet, and the air outlet. The indoor unit has a first air outlet state and a second air outlet state. In the first air outlet state, the switching component opens the first air duct outlet and closes the second air duct outlet, and opens the return air vent and closes the air outlet, with the first filter component avoiding the first air outlet. In the second air outlet state, the switching component closes the first air duct outlet and opens the second air duct outlet, and closes the return air vent and opens the air outlet, with the first filter component covering the first air outlet.

2. The indoor unit according to claim 1, characterized in that, The switching component includes: A movable volute is rotatably disposed within the fixed volute, and the movable volute is configured to selectively open or close the first air duct outlet, the second air duct outlet, and the air outlet by rotation; A baffle is connected to the moving volute and located outside the fixed volute. The baffle is configured to rotate synchronously with the moving volute to selectively open or close the return air inlet. In the first air outlet state, the moving volute opens the first air duct outlet and closes the second air duct outlet and the air outlet, and the baffle opens the return air outlet; In the second air outlet state, the moving volute closes the first air duct outlet and opens the second air duct outlet and the air outlet, and the baffle closes the return air outlet.

3. The indoor unit according to claim 2, characterized in that, The fixed volute is a plurality of those arranged at intervals along the length of the housing, and each fixed volute is provided with a moving volute. The baffles are multiple and are arranged at intervals along the length direction; the multiple moving volutes and the multiple baffles are arranged alternately along the length direction. The second filter assembly includes a plurality of ventilation sections and a plurality of filter sections arranged alternately along the length direction to divide the second air outlet into a plurality of air outlets and a plurality of air return outlets arranged alternately along the length direction. The baffles correspond one-to-one with the return air inlets, and the baffles are configured to control the opening and closing of the corresponding return air inlets; the moving volutes correspond one-to-one with the air outlets, and the moving volutes are configured to control the opening and closing of the corresponding air outlets.

4. The indoor unit according to any one of claims 1-3, characterized in that, The first air duct outlet faces and is connected to the first air inlet, and the second air duct outlet faces and is connected to the second air inlet.

5. The indoor unit according to claim 3, characterized in that, The second filter assembly includes a frame, the frame comprising a plurality of return air grilles and outlet air grilles arranged alternately along the length direction; The return air grille is equipped with a filter screen to form the filtration section; the outlet air grille is open to form the ventilation section.

6. The indoor unit according to any one of claims 1-3, characterized in that, The first filter assembly includes an upper filter element and a lower filter element, both of which include an adapter end and a free end, and the adapter end is rotatably disposed on the housing; In the first air outlet state, the free ends of the upper filter and the lower filter are far apart from each other to avoid the first air outlet; in the second air outlet state, the free ends of the upper filter and the lower filter are connected to each other to cover the first air outlet.

7. The indoor unit according to claim 6, characterized in that, The first air vent is located on the side wall of the housing, and the second air vent is located on the bottom wall of the housing; the indoor unit further includes: Mounting base, disposed on the top wall of the housing; A water receiving tray is disposed on the bottom wall of the shell; The upper filter element's adapter end is rotatably mounted on the mounting base, and the lower filter element's adapter end is rotatably mounted on the water receiving tray.

8. The indoor unit according to claim 1, characterized in that, The indoor unit also includes a heat exchanger disposed within the housing, the heat exchanger being located between the first filter assembly and the fixed volute; wherein the side of the heat exchanger facing the first air outlet has a predetermined distance from the first air outlet.

9. The indoor unit according to claim 8, characterized in that, The preset spacing is 70mm to 100mm.

10. The indoor unit according to claim 8, characterized in that, The heat exchanger includes an upper heat exchanger and a lower heat exchanger arranged sequentially along the height direction of the shell. The upper heat exchanger has a first angle with the width direction of the shell. In the width direction, the distance between the end of the upper heat exchanger away from the lower heat exchanger and the first air outlet is greater than the distance between the end of the upper heat exchanger closer to the lower heat exchanger and the first air outlet. The lower heat exchanger has a second angle with the width direction. In the width direction, the distance between the end of the lower heat exchanger away from the upper heat exchanger and the first air outlet is greater than the distance between the end of the lower heat exchanger closer to the upper heat exchanger and the first air outlet. Wherein, the first included angle is smaller than the second included angle.

11. The indoor unit according to claim 10, characterized in that, The first included angle is 30° to 45°, and the second included angle is 70° to 85°.

12. An air conditioner, characterized in that, Including the indoor unit as described in any one of claims 1-11.

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