Ceiling type air conditioner indoor unit

Abstract

The utility model provides a kind of ceiling type air conditioner indoor unit, comprising: shell, with first air port, second air port and with first air port and second air port all intercommunication air cavity, air cavity includes first flow channel, intercommunication channel and second flow channel connected in turn;First volute tongue has the first flow-limiting position cooperation with fan and the first avoidance position of avoiding fan and forming for airflow flow first avoidance port;Second volute tongue has the second flow-limiting position cooperation with fan and the second avoidance position of avoiding fan and forming for airflow flow second avoidance port;Wherein, when first volute tongue is in first flow-limiting position, second volute tongue is in second avoidance position;When first volute tongue is in first avoidance position, second volute tongue is in second flow-limiting position.Through the technical scheme provided by the utility model, the technical problem that the comfort is lower due to the fixed air supply direction of the ceiling type air conditioner indoor unit in the prior art can be solved.

Description

Technical Field

[0001] This utility model relates to the technical field of ceiling-mounted air conditioner indoor units, and more specifically, to a ceiling-mounted air conditioner indoor unit. Background Technology

[0002] In the field of air conditioning technology, especially in ceiling-mounted air conditioners used in home and office environments, traditional designs typically employ centrifugal fans as the power source, achieving indoor temperature regulation through a single airflow direction. This type of air conditioner has been widely used in the industry due to its simple construction and low cost. However, the airflow characteristics of centrifugal fans dictate that the airflow is blown radially out of the volute, and this fixed directionality reveals significant limitations under different seasons and usage scenarios.

[0003] Specifically, in cooling mode, traditional ceiling-mounted air conditioners effectively meet user comfort needs due to the natural sinking of cool air. However, in heating mode, hot air, due to its rising nature, struggles to sink quickly to the lower part of the room, resulting in poor heating performance. This leads to a temperature distribution where the upper part of the room is warmer than the lower part, reducing comfort and potentially causing the air conditioner to misjudge that the set temperature has been reached and shut down prematurely, increasing energy consumption. Furthermore, a single airflow mode cannot meet the multi-directional airflow needs of users in different situations, especially in scenarios requiring rapid cooling or avoiding direct airflow, where the limitations of existing technology are even more pronounced. Utility Model Content

[0004] The main objective of this invention is to provide a ceiling-mounted air conditioner indoor unit to solve the technical problem of low comfort caused by the fixed air supply direction in existing ceiling-mounted air conditioner indoor units.

[0005] To achieve the above objectives, the present invention provides a ceiling-mounted air conditioner indoor unit, comprising:

[0006] The outer casing has a first air vent, a second air vent, and an air cavity that communicates with both the first air vent and the second air vent. The air cavity includes a first flow channel, a connecting channel, and a second flow channel connected in sequence. The first flow channel communicates with the first air vent, and the second flow channel communicates with the second air vent.

[0007] The fan is installed within the connecting channel;

[0008] The first volute tongue is movably disposed at the first flow guide channel. The first volute tongue has a first flow limiting position that cooperates with the fan and a first clearance position that avoids the fan and forms a first clearance opening for airflow.

[0009] The second volute tongue is movably disposed at the second flow guide channel. The second volute tongue has a second flow limiting position that cooperates with the fan and a second clearance position that avoids the fan and forms a second clearance opening for airflow.

[0010] Specifically, when the first volute tongue is in the first flow-limiting position, the second volute tongue is in the second clearance position, so that the airflow flows sequentially through the second guide channel, the connecting channel and the first guide channel; when the first volute tongue is in the first clearance position, the second volute tongue is in the second flow-limiting position, so that the airflow flows sequentially through the first guide channel, the connecting channel and the second guide channel.

[0011] Furthermore, the ceiling-mounted air conditioner indoor unit also includes:

[0012] A first flow guiding structure is installed on the inner wall of the air cavity. The first flow guiding structure has a first flow guiding surface and a second flow guiding surface. The first flow guiding surface and the inner wall of the air cavity form a first flow guiding channel. The second flow guiding surface is located at the second air outlet and is used to form the second flow guiding channel. The fan is installed on the side of the first flow guiding surface close to the second flow guiding surface. The side of the fan away from the first flow guiding surface is used to form the communicating channel with the inner wall of the air cavity.

[0013] Furthermore, the second guide surface and the second volute tongue are respectively disposed on both sides of the second air outlet; when the second volute tongue is in the second clearance position, the second guide surface and the volute tongue surface of the second volute tongue form the second guide channel.

[0014] Furthermore, at least one of the first guide surface, the second guide surface, and the volute surface of the second volute tongue is an arc-shaped surface.

[0015] Furthermore, the ceiling-mounted air conditioner indoor unit also includes:

[0016] A second flow guiding structure is installed on the inner wall of the air cavity and is at least partially opposite and spaced apart from the first flow guiding structure. The first volute tongue is movably disposed on the second flow guiding structure, and one side of the second flow guiding structure is used to form a communication channel with the inner wall of the air cavity.

[0017] Furthermore, one side of the second flow-guiding structure is a third flow-guiding surface, which is an arc-shaped surface; and / or,

[0018] One end of the second flow guiding structure is fixedly connected to the inner wall of the air cavity, and the other end of the second flow guiding structure extends out of the inner wall of the air cavity. One end of the first volute tongue is hinged to the other end of the second flow guiding structure. When the first volute tongue is in the first clearance position, the other end of the first volute tongue is attached to the inner wall of the air cavity so that the second flow guiding structure and the first volute tongue form a flow guiding protrusion.

[0019] Furthermore, when the first volute tongue is in the first avoidance position, at least a portion of the first volute tongue is fitted against the wall of the air cavity; and / or,

[0020] When the second volute tongue is in the second avoidance position, at least a portion of the second volute tongue is fitted against the wall of the air cavity.

[0021] Furthermore, the first volute tongue is rotatably disposed at the first flow channel; and / or,

[0022] The second volute tongue is rotatably disposed at the second air vent.

[0023] Furthermore, the housing has a top and a bottom that are disposed opposite to each other, with the first air vent located between the top and the bottom, and the second air vent located at the bottom.

[0024] Furthermore, the ceiling-mounted air conditioner indoor unit also includes:

[0025] An evaporator is disposed within the first airflow channel, and the evaporator is positioned opposite to the first air outlet.

[0026] By applying the technical solution of this utility model, a unique change in the position of the first and second volute tongues achieves bidirectional airflow. This not only improves comfort in cooling mode, avoiding the discomfort of cold air blowing directly on the body, but also allows hot air to quickly sink in heating mode, improving the overall temperature uniformity of the room, enhancing heating effect, reducing energy consumption, and achieving a more energy-efficient and user-friendly air conditioning experience. Furthermore, by adjusting the position of the volute tongues, this design eliminates the need to increase the number of air vents, simplifying the installation process, reducing costs, and increasing market acceptance. This innovative air duct design provides users with an air conditioning solution that can both quickly cool and evenly heat and cool, greatly enhancing the user experience. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0028] Figure 1A schematic diagram of the downward air outlet of a ceiling-mounted air conditioner indoor unit according to an embodiment of the present invention is shown.

[0029] Figure 2 A schematic diagram of the air outlet of the ceiling-mounted air conditioner indoor unit according to an embodiment of the present invention is shown.

[0030] The above figures include the following reference numerals:

[0031] 10. Outer casing;

[0032] 11. The first opportunity for growth;

[0033] 12. The second wind gap;

[0034] 13. Wind cavity;

[0035] 131. First diversion channel;

[0036] 132. Connecting channel;

[0037] 133. Second diversion channel;

[0038] 20. Fan;

[0039] 31. First cochlear tongue;

[0040] 32. Second cochlear tongue;

[0041] 41. First flow guiding structure;

[0042] 411. First guide surface;

[0043] 412. Second guide surface;

[0044] 42. Second flow guiding structure;

[0045] 421. Third guide surface;

[0046] 50. Evaporator;

[0047] 60. Suspended ceiling;

[0048] 70. Water tray;

[0049] 80. Hanging rod;

[0050] 90. Ceiling;

[0051] 100. Wall. Detailed Implementation

[0052] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0053] like Figure 1 and Figure 2 As shown, an embodiment of this utility model provides a ceiling-mounted air conditioner indoor unit, which includes: a housing 10, a fan 20, a first volute 31, and a second volute 32. The housing 10 has a first air outlet 11, a second air outlet 12, and an air cavity 13 that communicates with both the first air outlet 11 and the second air outlet 12. The air cavity 13 includes a first guide channel 131, a connecting channel 132, and a second guide channel 133 connected in sequence. The first guide channel 131 communicates with the first air outlet 11, and the second guide channel 133 communicates with the second air outlet 12. The fan 20 is installed in the connecting channel 132. The first volute 31 is movably disposed at the first guide channel 131. The first volute 31 has a first flow-limiting position that cooperates with the fan 20 and a first clearance position that avoids the fan 20 and forms a first clearance opening for airflow. The second volute tongue 32 is movably disposed at the second flow guide channel 133. The second volute tongue 32 has a second flow-limiting position that cooperates with the fan 20 and a second clearance position that avoids the fan 20 and forms a second clearance opening for airflow. Specifically, when the first volute tongue 31 is in the first flow-limiting position, the second volute tongue 32 is in the second clearance position, so that the airflow sequentially flows through the second flow guide channel 133, the connecting channel 132, and the first flow guide channel 131; when the first volute tongue 31 is in the first clearance position, the second volute tongue 32 is in the second flow-limiting position, so that the airflow sequentially flows through the first flow guide channel 131, the connecting channel 132, and the second flow guide channel 133.

[0054] The ceiling-mounted air conditioner indoor unit provided in this embodiment adjusts the airflow direction by changing the positions of the first volute tongue 31 and the second volute tongue 32. In principle, the change in the position of the volute tongue affects the airflow guidance, thereby changing the airflow outlet direction. In terms of effect, the technology in this embodiment achieves multi-angle airflow of hot and cold air by adjusting the position of the volute tongue, improving the comfort and heating effect of the air conditioner and reducing operating energy consumption. In other embodiments, the shape of the volute tongue or different types of fan blades can be changed to adapt to different airflow needs and environmental conditions, solving the problem of a single airflow mode.

[0055] Specifically, the first air vent 11 is located on the side between the top and bottom of the housing 10, and the second air vent is located at the bottom of the housing 10, thereby realizing a bidirectional air supply mode of side air outlet and bottom air outlet.

[0056] It should be noted that "the first volute tongue 31 has a first flow-limiting position that cooperates with the fan 20" can be understood as the first volute tongue 31 moving to a position where the gap between it and the fan 20 is smaller. Specifically, this position where the gap is smaller can be understood as allowing the cross-flow fan blades of the fan 20 to rotate normally, while effectively preventing excessive airflow from flowing out between the cross-flow fan blades of the fan 20 and the first volute tongue 31, thus ensuring the sealing between the cross-flow fan blades of the fan 20 and the first volute tongue 31 as much as possible.

[0057] It should be noted that "the first volute tongue 31 is in the first avoidance position" can be understood as having a large gap between the first volute tongue 31 and the cross-flow fan blade of the fan 20, so that the airflow can flow smoothly between the first volute tongue 31 and the cross-flow fan blade of the fan 20.

[0058] It should be noted that the explanation of the second flow restriction position can refer to the explanation of the first flow restriction position.

[0059] It should be noted that the explanation of the second avoidance position can refer to the explanation of the second limit position.

[0060] Specifically, the ceiling-mounted air conditioner indoor unit further includes: a first airflow guiding structure 41, which is installed on the inner wall of the air cavity 13. The first airflow guiding structure 41 has a first airflow guiding surface 411 and a second airflow guiding surface 412. The first airflow guiding surface 411 and the inner wall of the air cavity 13 form a first airflow guiding channel 131. The second airflow guiding surface 412 is located at the second air outlet 12 and is used to form the second airflow guiding channel 133. The fan 20 is installed on the side of the first airflow guiding surface 411 near the second airflow guiding surface 412. The side of the fan 20 away from the first airflow guiding surface 411 is used to form the communicating channel 132 with the inner wall of the air cavity 13. The first airflow guiding structure 41 optimizes the airflow guiding path and ensures smooth airflow in different air supply modes. In principle, the specific shape of the airflow guiding structure can guide the airflow to flow along a predetermined path, reducing turbulence and resistance. In terms of effectiveness, the technology in this embodiment improves the air delivery efficiency and comfort of the air conditioner through precise airflow guidance, avoiding the discomfort that may be caused by hot or cold air blowing directly on the human body. In other embodiments, the airflow distribution can be further optimized by adjusting the size, shape, or material of the airflow guiding structure to solve the problem of uneven airflow distribution.

[0061] Furthermore, the second guide surface 412 and the second volute tongue 32 are respectively disposed on both sides of the second air outlet 12; when the second volute tongue 32 is in the second clearance position, the second guide surface 412 and the volute tongue surface of the second volute tongue 32 form the second guide channel 133. The cooperation between the second guide surface 412 and the second volute tongue 32 forms a second airflow guiding path, enabling the airflow to circulate more effectively in the downward air outlet mode. In principle, the relative position of the volute tongue surface and the guide surface determines the direction of airflow. In other embodiments, the curvature of the second guide surface 412 or the size of the second volute tongue 32 can be changed to adapt to different room sizes and heights, thus solving the problem of poor heating performance.

[0062] In terms of effectiveness, the technology in this embodiment, through the formation of the second airflow channel 133, ensures that the hot air flowing out through the second air outlet 12 at the bottom in the downflow mode can quickly sink to the lower part of the room, thereby improving the heating effect and comfort.

[0063] Specifically, the second volute tongue 32 is located on the side of the second guide surface 412 away from the first air outlet 11, so as to ensure that the second volute tongue 32 can effectively guide the air at the second air outlet 12 stably, whether in the second flow-limiting position or the second avoidance position.

[0064] Furthermore, at least one of the first guide surface 411, the second guide surface 412, and the volute surface of the second volute tongue 32 is an arc-shaped surface. The arc-shaped surface design reduces resistance during airflow and improves airflow efficiency. In principle, the arc-shaped surface can guide airflow more smoothly, reducing turbulence and thus lowering noise and energy consumption. In terms of effectiveness, the technology in this embodiment, through the arc-shaped surface design, improves the operating efficiency and quietness of the air conditioner, enhancing the user experience. In other embodiments, arc-shaped surfaces with different curvatures can be used to adapt to different air delivery distances and angles, solving the problems of short air delivery distances and limited air delivery angles.

[0065] Furthermore, the ceiling-mounted air conditioner indoor unit also includes a second airflow guiding structure 42. The second airflow guiding structure 42 is installed on the inner wall of the air cavity 13 and is at least partially opposite and spaced from the first airflow guiding structure 41. The first volute tongue 31 is movably disposed on the second airflow guiding structure 42. One side of the second airflow guiding structure 42 is used to form a communicating channel 132 with the inner wall of the air cavity 13. The addition of the second airflow guiding structure 42 provides additional airflow guidance, enhancing the controllability of the airflow. In principle, the relative arrangement of the second airflow guiding structure 42 and the first airflow guiding structure 41 forms a complete airflow circulation path. In terms of effect, the technology in this embodiment, through the setting of the second airflow guiding structure 42, improves the flexibility and stability of the air conditioner when changing air supply modes, avoiding airflow turbulence. In other embodiments, the layout of the second airflow guiding structure 42 can be increased or adjusted to adapt to more varied air supply needs, solving the problem of inflexible airflow control.

[0066] Furthermore, one side of the second flow guiding structure 42 is a third flow guiding surface 421, which is an arc-shaped surface; and / or, one end of the second flow guiding structure 42 is fixedly connected to the inner wall of the air cavity 13, and the other end of the second flow guiding structure 42 extends out of the inner wall of the air cavity 13, with one end of the first volute tongue 31 hinged to the other end of the second flow guiding structure 42; when the first volute tongue 31 is in the first clearance position, the other end of the first volute tongue 31 is attached to the inner wall of the air cavity 13, so that the second flow guiding structure 42 and the first volute tongue 31 form a flow guiding protrusion. The formation of the flow guiding protrusion optimizes the flow path of the airflow in the air cavity 13 and improves the guiding accuracy of the airflow. In principle, the arc-shaped design of the third flow guiding surface 421 and the hinged structure of the first volute tongue 31 work together to form an effective airflow guiding structure. In terms of effectiveness, the technology in this embodiment, through the formation of the guide protrusion, can effectively guide the airflow so that the airflow can be blown evenly to the evaporator 50 which is set opposite to the first air outlet 11, thereby improving the uniformity of the air outlet.

[0067] Specifically, by ensuring a stable airflow from the first air vent 11, the side-mounted first air vent 11 can deliver air, improving the distribution of cool air in side-discharge mode by ensuring a higher point of output and enhancing comfort. In other embodiments, the curvature of the third guide surface 421 or the hinge point position of the first volute tongue 31 can be changed to adapt to different room layouts and user preferences, thus solving the problem of uneven cool air distribution.

[0068] Furthermore, when the first volute tongue 31 is in the first clearance position, at least a portion of the first volute tongue 31 is fitted against the wall of the air cavity 13; and / or, when the second volute tongue 32 is in the second clearance position, at least a portion of the second volute tongue 32 is fitted against the wall of the air cavity 13.

[0069] This structural design, with its tight fit between the volute and the wall of the air chamber 13, reduces airflow leakage and improves airflow concentration. In principle, this tight fit effectively prevents airflow leakage along unintended paths, ensuring that the airflow follows a predetermined path. In terms of effect, the technology in this embodiment, through the close fit between the volute and the wall, improves the airflow concentration of the air conditioner in different air supply modes, thus enhancing the air supply effect. In other embodiments, the airtightness can be further improved by modifying the sealing material of the volute or adding sealing devices, thus solving the problem of reduced air supply effect caused by airflow leakage.

[0070] Furthermore, the first volute 31 is rotatably disposed at the first airflow channel 131; and / or, the second volute 32 is rotatably disposed at the second air outlet 12. The rotatable design of the volute allows the airflow direction to be adjusted as needed, increasing the flexibility of the air conditioner. In principle, the rotation of the volute changes its relative position to the airflow, thereby altering the airflow direction. In terms of effect, the technology in this embodiment improves the airflow flexibility of the air conditioner in both cooling and heating modes through the rotatability of the volute, meeting the user's need for multi-angle airflow. In other embodiments, automatic control can be achieved by using a motor to drive the volute rotation, solving the problem of inconvenience in manually adjusting the volute.

[0071] Furthermore, the outer casing 10 has a top and a bottom that are positioned opposite each other, with the first air vent 11 located between the top and the bottom, and the second air vent 12 located at the bottom. The different positions of the air vents determine the initial direction of the airflow, thus affecting the final air delivery direction. In terms of effectiveness, the technology in this embodiment improves the diversity of air delivery modes of the air conditioner and enhances comfort and heating performance by rationally arranging the air vent positions. In other embodiments, the height or angle of the air vents can be adjusted to adapt to different room structures and user needs, solving the problem of a single air delivery mode.

[0072] Furthermore, the ceiling-mounted air conditioner indoor unit also includes an evaporator 50, which is disposed within the first airflow channel 131 and is positioned opposite the first air outlet 11. The evaporator 50 achieves cooling or heating of the airflow and is the core heat exchange component of the air conditioner. In principle, when the airflow passes through the evaporator 50, it exchanges heat with the surface of the evaporator 50, thereby changing the temperature. In terms of effect, the technology in this embodiment improves the contact efficiency between the airflow and the evaporator 50 through the precise positioning design of the evaporator 50, enhancing the heat exchange capacity of the air conditioner. In other embodiments, the heat exchange efficiency can be improved by modifying the structure or material of the evaporator 50, thus solving the problem of poor heat exchange effect.

[0073] like Figure 1 As shown, the ceiling-mounted air conditioner indoor unit of this utility model includes: a casing 10, a suspension rod 80, a back panel (second volute 32), a first volute 31, a cross-flow fan (fan 20), a first air outlet 11, a second air outlet 12, an evaporator 50, and a drip tray 70. The unit is suspended from the indoor ceiling by the suspension rod 80 and concealed by a ceiling 60. Ventilation holes in the ceiling connect to the first air outlet 11 and the second air outlet 12 of the unit. The first air outlet 11 is on the side of the unit, and the second air outlet 12 is below the unit. The back panel is connected to the second air outlet 12. A first rotating shaft is designed in the lower middle part of the back panel. The first volute 31 is designed to connect to the top of the unit, and a second rotating shaft is installed on the first volute 31. The cross-flow fan 20 is disposed between the first volute 31 and the back panel. On the other side of the fan 20, which is connected to the first volute tongue 31 and the back plate, there is an air duct profile (corresponding to the first guide structure 41), which is an integral fixed design and serves as the reference air duct for the airflow reversal of the fan 20.

[0074] like Figure 1 The unit's air outlet is located at the bottom. The back plate and the first volute 31 rotate around the first and second rotating shafts, respectively, so that the back plate is in the second flow-limiting position and the first volute 31 is in the first clearance position. The flow fan 20 rotates counterclockwise, and the airflow enters from the first air outlet 11, passes through the evaporator 50, and is blown out from the second air outlet 12 by the cross-flow system formed by the combination of the back plate and the air duct profile.

[0075] like Figure 2 The unit has side-discharge airflow. The back plate and the first volute 31 rotate around the first and second rotating shafts, respectively, so that the back plate is in the second clearance position and the first volute 31 is in the first flow-limiting position. The flow fan 20 rotates counterclockwise, and the airflow enters from the second air outlet 12. The cross-flow system formed by the combination of the first volute 31 and the air duct profile passes through the evaporator 50, and the air is blown out from the second air outlet 12.

[0076] By changing the position of the back panel and the first volute 31, the unit can form a system including two fans 20, enabling both bottom and side airflow. In cooling mode, the unit operates with side airflow, blowing air parallel to the ceiling, allowing the cold air to sink freely, achieving the comfort requirement of cool air not blowing directly on people. In cooling mode, the unit operates with bottom airflow, causing the cold air to quickly sink to the lower part of the room, rapidly lowering body surface temperature and achieving rapid cooling. After achieving rapid cooling, it can automatically switch to side airflow operation, providing even better temperature control and comfort.

[0077] By changing the position of the back panel and the first volute 31, the unit can form a system including two fans 20, enabling both bottom and side airflow. In heating mode, the unit operates with bottom airflow, quickly blowing hot air to the lower part of the room, where it slowly rises and is transferred, significantly improving the overall heat transfer efficiency, resulting in better heating performance and more energy-efficient operation. When the room temperature has reached a comfortable level, the unit can switch to side airflow mode to avoid direct, excessively hot air blowing on people, preventing discomfort.

[0078] The air duct design in this embodiment is simple and effective. Specifically, the ceiling-mounted air conditioner indoor unit in this embodiment is installed on the wall 100 and the ceiling 90.

[0079] During use, the ceiling-mounted air conditioner indoor unit can change the airflow direction by adjusting the positions of the first volute 31 and the second volute 32 according to different operating modes (cooling or heating) and user needs (side air outlet or bottom air outlet). When the air conditioner is operating in cooling mode and side air outlet is required, the first volute 31 is in the first flow-limiting position and the second volute 32 is in the second clearance position. At this time, the airflow enters from the second air outlet 12, is cooled by the evaporator 50, and is blown out laterally from the first air outlet 11 through the connecting channel 132 and the first guide channel 131. The cold air sinks freely, meeting the comfort requirement of not blowing cold air directly on people.

[0080] When the air conditioner is in cooling mode and downward airflow is required, the first volute 31 is in the first clearance position and the second volute 32 is in the second flow-limiting position. The airflow enters from the first air outlet 11, is cooled by the evaporator 50, and is blown downward from the second air outlet 12 through the connecting channel 132 and the second guide channel 133. The cold air quickly sinks to the lower part of the room to achieve the need for rapid cooling.

[0081] In heating mode, when downward airflow is required, the first volute 31 is in the first clearance position, and the second volute 32 is in the second flow-limiting position. Hot air can be quickly blown to the lower part of the room, where it slowly rises and is transferred, greatly improving the heat transfer efficiency of the entire room, resulting in better heating performance and more energy-efficient unit operation. When the room temperature has reached a relatively comfortable level, the unit can also switch to side airflow operation to avoid direct, excessively hot air blowing on people and causing discomfort. The entire process demonstrates the flexibility and efficiency of this invention in terms of airflow mode, as well as its focus on user comfort.

[0082] Specifically, in this embodiment, the air conditioning system consists of two fan systems forming a bottom-discharge and side-discharge airflow system. The two fan systems with different airflow directions are formed by the combination of the first volute 31 and the back plate. In fact, the duct profile is composed of the first volute 31 of one fan system and the back plate of the other. The first fan system, consisting of the back plate and the duct profile, blows downwards, which is a suction type for the evaporator. This results in more even airflow to the evaporator, and the airflow is directly downwards. In heating mode, the air travels further, which is beneficial for heat exchange between the upper and lower layers of air.

[0083] The second fan system, formed by the combination of the first volute 31 and the duct profile, features a short duct profile that creates a divergent airflow that evenly passes through the evaporator, preventing high-speed airflow from directly impacting it. This results in a more uniform and gentle airflow, making it more suitable for cooling mode. In this design, the duct profile consists of the first volute 31 of one fan system and the backplate of the other. This significantly reduces the space required for the two fans 20 within the unit. The optimized spatial layout allows for the formation of two high-efficiency cross-flow airflow systems.

[0084] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects: bidirectional airflow and multi-angle air delivery, meeting users' needs for directional airflow. It improves heating performance and reduces energy consumption during air conditioning operation. The above embodiments solve the problems of traditional ceiling-mounted air conditioners failing to blow hot air down, their poor heating performance, and their single airflow mode and poor comfort. The air duct design in this embodiment, with its rotatable and swingable backplate and volute combined with a flow-through fan blade design, enables side and bottom airflow from the air conditioner. Both cold and hot air from the air conditioner can be discharged from the side and bottom, meeting users' multi-directional airflow needs, improving air conditioner comfort and increasing energy efficiency.

[0085] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0086] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0087] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0088] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0089] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0090] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A ceiling-mounted air conditioner indoor unit, characterized in that, include: The outer casing (10) has a first air vent (11), a second air vent (12), and an air cavity (13) that communicates with both the first air vent (11) and the second air vent (12). The air cavity (13) includes a first flow channel (131), a connecting channel (132), and a second flow channel (133) connected in sequence. The first flow channel (131) communicates with the first air vent (11), and the second flow channel (133) communicates with the second air vent (12). A fan (20) is installed in the connecting channel (132); The first volute tongue (31) is movably disposed at the first flow guide channel (131). The first volute tongue (31) has a first flow limiting position that cooperates with the fan (20) and a first clearance position that avoids the fan (20) and forms a first clearance opening for airflow. The second volute tongue (32) is movably disposed at the second flow guide channel (133). The second volute tongue (32) has a second flow limiting position that cooperates with the fan (20) and a second clearance position that avoids the fan (20) and forms a second clearance opening for airflow. When the first volute tongue (31) is in the first flow-limiting position, the second volute tongue (32) is in the second clearance position, so that the airflow flows through the second guide channel (133), the connecting channel (132) and the first guide channel (131) in sequence; when the first volute tongue (31) is in the first clearance position, the second volute tongue (32) is in the second flow-limiting position, so that the airflow flows through the first guide channel (131), the connecting channel (132) and the second guide channel (133) in sequence.

2. The ceiling-mounted air conditioner indoor unit according to claim 1, characterized in that, The ceiling-mounted air conditioner indoor unit also includes: A first flow guiding structure (41) is installed on the inner wall of the air cavity (13). The first flow guiding structure (41) has a first flow guiding surface (411) and a second flow guiding surface (412). The first flow guiding surface (411) and the inner wall of the air cavity (13) form a first flow guiding channel (131). The second flow guiding surface (412) is located at the second air outlet (12) and is used to form the second flow guiding channel (133). The fan (20) is installed on the side of the first flow guiding surface (411) close to the second flow guiding surface (412). The side of the fan (20) away from the first flow guiding surface (411) is used to form the communicating channel (132) with the inner wall of the air cavity (13).

3. The ceiling-mounted air conditioner indoor unit according to claim 2, characterized in that, The second guide surface (412) and the second volute tongue (32) are respectively disposed on both sides of the second air outlet (12); when the second volute tongue (32) is in the second clearance position, the second guide surface (412) and the volute tongue surface of the second volute tongue (32) form the second guide channel (133).

4. The ceiling-mounted air conditioner indoor unit according to claim 3, characterized in that, At least one of the first guide surface (411), the second guide surface (412), and the volute surface of the second volute tongue (32) is an arc-shaped surface.

5. The ceiling-mounted air conditioner indoor unit according to claim 2, characterized in that, The ceiling-mounted air conditioner indoor unit also includes: The second flow guide structure (42) is installed on the inner wall of the air cavity (13) and is at least partially opposite and spaced from the first flow guide structure (41). The first volute tongue (31) is movably disposed on the second flow guide structure (42). One side of the second flow guide structure (42) is used to form the communicating channel (132) with the inner wall of the air cavity (13).

6. The ceiling-mounted air conditioner indoor unit according to claim 5, characterized in that, One side of the second flow guiding structure (42) is a third flow guiding surface (421), which is an arc-shaped surface; and / or, One end of the second flow guiding structure (42) is fixedly connected to the inner wall of the air cavity (13), and the other end of the second flow guiding structure (42) extends out of the inner wall of the air cavity (13). One end of the first volute tongue (31) is hinged to the other end of the second flow guiding structure (42). When the first volute tongue (31) is in the first clearance position, the other end of the first volute tongue (31) is attached to the inner wall of the air cavity (13) so that the second flow guiding structure (42) and the first volute tongue (31) form a flow guiding protrusion.

7. The ceiling-mounted air conditioner indoor unit according to claim 1, characterized in that, When the first volute tongue (31) is in the first clearance position, at least a portion of the first volute tongue (31) is fitted against the wall of the air cavity (13); and / or, When the second volute tongue (32) is in the second avoidance position, at least a portion of the second volute tongue (32) is fitted against the wall of the air cavity (13).

8. The ceiling-mounted air conditioner indoor unit according to claim 1, characterized in that, The first volute tongue (31) is rotatably disposed at the first guide channel (131); and / or, The second volute (32) is rotatably disposed at the second air vent (12).

9. The ceiling-mounted air conditioner indoor unit according to any one of claims 1 to 8, characterized in that, The housing (10) has a top and a bottom that are disposed opposite to each other, the first air vent (11) is located between the top and the bottom, and the second air vent (12) is located at the bottom.

10. The ceiling-mounted air conditioner indoor unit according to any one of claims 1 to 8, characterized in that, The ceiling-mounted air conditioner indoor unit also includes: An evaporator (50) is disposed in the first air guide channel (131), and the evaporator (50) is disposed opposite to the first air outlet (11).

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