Ceiling-mounted air conditioners and their control methods

Abstract

This application relates to a ceiling-mounted air conditioner and its control method, belonging to the field of air conditioning technology, and aims to solve the problem that hot air from the indoor unit of a ceiling-mounted air conditioner tends to concentrate in the upper part of the room during heating mode, resulting in poor heating performance. The ceiling-mounted air conditioner includes an indoor unit with a ceiling-mounted structure, comprising a casing, an indoor heat exchanger, and a fan assembly. The casing has a first air vent and a second air vent, the first air vent facing downwards, and the second air vent having an angle between its outlet and the vertical direction. The indoor heat exchanger and the fan assembly are housed within the casing. In heating mode, the fan assembly is in a first operating state with the first impeller rotating, driving airflow sequentially through the second air vent and the indoor heat exchanger, and then expelling the airflow from the first air vent. In cooling mode, the fan assembly is in a second operating state with the second impeller rotating, driving airflow sequentially through the first air vent and the indoor heat exchanger, and then expelling the airflow from the second air vent.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to a ceiling-mounted air conditioner and its control method. Background Technology

[0002] Ceiling-mounted air conditioners, a typical type of embedded air conditioner, are widely used in commercial spaces such as shopping malls, hotels, and offices due to their advantages such as ceiling-mountable installation, no floor space occupation, and simple and aesthetically pleasing appearance. Traditional ceiling-mounted air conditioners generally employ a fixed airflow design, using a single airflow organization method of bottom intake and top exhaust in both cooling and heating modes. This structure has significant physical limitations: in heating mode, hot air, being less dense, naturally rises, and since the air conditioner's outlet is located at the top, hot air accumulates in the upper part of the room, making effective circulation difficult. This contradiction between physical characteristics and the fixed airflow design leads to uneven indoor temperature distribution, low temperature regulation efficiency, and severely impacts user comfort. Summary of the Invention

[0003] This application provides a ceiling-mounted air conditioner and its control method, which aims to solve the problem that hot air from the indoor unit of the ceiling-mounted air conditioner will concentrate in the top space of the room during heating mode, resulting in poor heating effect.

[0004] In a first aspect, this application provides a ceiling-mounted air conditioner, including an indoor unit. The indoor unit has a ceiling-mounted structure and includes a casing, an indoor heat exchanger, and a fan assembly. The casing has a first air outlet and a second air outlet. The first air outlet is downward-facing, and the air outlet angle of the second air outlet forms an angle with the vertical direction. The indoor heat exchanger and the fan assembly are disposed within the casing. The fan assembly includes a first impeller and a second impeller, both disposed within the casing. The fan assembly is configured such that: in heating mode, the fan assembly is in a first operating state and the first impeller rotates to drive airflow sequentially through the second air outlet and the indoor heat exchanger, and the airflow is blown out from the first air outlet; in cooling mode, the fan assembly is in a second operating state and the second impeller rotates to drive airflow sequentially through the first air outlet and the indoor heat exchanger, and the airflow is blown out from the second air outlet.

[0005] In some embodiments, the fan assembly includes a drive fan, a first gear, a second gear, a third gear, and a gear shifter. The first gear is coaxially connected to a first impeller, the second gear is coaxially connected to a second impeller, and the third gear is connected to the output end of the drive fan. The gear shifter is configured such that: in a first operating state, the gear shifter is in the first gear position, and the first and third gears are drive-connected; in a second operating state, the gear shifter is in the second gear position, and the second and third gears are drive-connected.

[0006] In some embodiments, the gear shifter includes a first transmission gear, a second transmission gear, and a drive member, the drive member being configured such that: in a first gear position, the drive member drives the first transmission gear to mesh with the first gear and the third gear; and in a second gear position, the drive member drives the second transmission gear to mesh with the second gear and the third gear.

[0007] In some embodiments, the gear shifter further includes a track component, a first shifting component, a second shifting component, and a third transmission gear. The first shifting component is slidably connected to the track component, and the first transmission gear is rotatably connected to the first shifting component. The second shifting component is slidably connected to the track component, and the second transmission gear is rotatably connected to the second shifting component. The first shifting component has a first tooth on its side facing the second shifting component, and the second shifting component has a second tooth on its side facing the first shifting component. The first and second teeth are arranged along the length direction of the track component. The third transmission gear is connected to a drive component and meshes between the first and second teeth. The drive component is a switching motor and is configured such that: the switching motor rotates forward to move the first transmission gear to the meshing engagement position and disengage the second transmission gear from the meshing engagement position; the switching motor rotates in the reverse direction to disengage the first transmission gear from the meshing engagement position and move the second transmission gear to the meshing engagement position.

[0008] In some embodiments, the gear shifter further includes a first connecting rod, a second connecting rod, a third connecting rod, and a fourth connecting rod. The first connecting rod extends along the length of the track component, and a first transmission gear is rotatably connected to a first shifting component via the first connecting rod. The second connecting rod extends along the length of the track component, and a second transmission gear is rotatably connected to a second shifting component via the second connecting rod. One end of the third connecting rod is slidably connected to the track component, and the other end of the third connecting rod is fixedly connected to the first shifting component. One end of the fourth connecting rod is slidably connected to the track component, and the other end of the fourth connecting rod is fixedly connected to the second shifting component.

[0009] In some embodiments, along the axial direction of the third gear, the first gear and the second gear are spaced apart on opposite sides of the third gear, the first impeller is located on the side of the first gear away from the third gear, and the second impeller is located on the side of the second gear away from the third gear.

[0010] In some embodiments, the fan assembly includes a first bushing, a second bushing, and a drive shaft. The two ends of the first bushing are connected to a first gear and a first impeller, and the two ends of the second bushing are connected to a second gear and a second impeller. The drive shaft is inserted into the first and second bushings and is connected to the output end of the drive fan. A third gear is disposed between the first and second bushings and coaxially connected to the drive shaft.

[0011] In some embodiments, the first impeller and the second impeller are centrifugal impellers. The first air outlet, the first impeller, and the second impeller are arranged sequentially from bottom to top.

[0012] In some embodiments, there are multiple second air vents, located outside the first air vent. The casing contains a first flow guide cavity and a second flow guide cavity, the second flow guide cavity communicating with the second air vents. The first flow guide cavity includes an upper chamber and a lower chamber, with a vent between the upper and lower chambers; the lower chamber communicates with the first air vent, and a first impeller is disposed within the lower chamber, with its air inlet side facing upwards and adapted to the vent. The upper chamber and the second flow guide cavity are connected via an indoor heat exchanger, with the second impeller located within the upper chamber.

[0013] Secondly, this application provides a control method for a ceiling-mounted air conditioner, applied to the ceiling-mounted air conditioner mentioned in the first aspect, the control method comprising the following steps:

[0014] Obtain the mode switching command from the air conditioner.

[0015] If the mode switching command is to switch to heating mode, the control fan assembly is switched to the first operating state so that airflow flows in from the second air vent and blows out from the first air vent downwards.

[0016] If the mode switching command is to switch to cooling mode, the control fan assembly is switched to the second operating state so that airflow enters from the first air vent and is blown out from the second air vent.

[0017] Thirdly, this application provides a control device for a ceiling-mounted air conditioner, including at least one communication interface, at least one bus connected to the at least one communication interface, at least one processor connected to the at least one bus, and at least one memory connected to the at least one bus. The processor is configured to execute the operational steps of the control method for the ceiling-mounted air conditioner described in the second aspect.

[0018] Fourthly, this application also provides a computer storage medium storing computer-executable instructions for executing the operational steps of the control method for the ceiling-mounted air conditioner in the second aspect.

[0019] The technical solutions provided in this application have the following advantages compared with the prior art:

[0020] The fan assembly in this embodiment is configured to have a first operating state and a second operating state. When the indoor unit is in heating mode, the fan assembly is in the first operating state, driving airflow into the casing from the second air vent, heating it through the indoor heat exchanger, and then blowing it vertically downwards from the first air vent. This helps to create a carpet-like heating effect and utilizes the natural rising characteristics of hot air to form circulating convection, thereby improving the uniformity of temperature distribution.

[0021] When the indoor unit is in cooling mode, the fan assembly operates in a second state, drawing indoor air in through the first air vent, cooling it through the indoor heat exchanger, and then blowing it out through the second air vent. The angle of the air guide plate or the second air vent is designed to allow cool air to be blown into the room in a near-horizontal manner. This allows the cool air to diffuse along the ceiling and then naturally sink, creating a waterfall-like cooling effect, avoiding direct airflow onto people while achieving rapid cooling and improving the uniformity of temperature distribution.

[0022] Traditional ceiling-mounted air conditioners only have unidirectional airflow and cannot optimize airflow organization according to heating and cooling load characteristics. This solution achieves a reversible airflow path design through the configuration of the fan components. While maintaining the compactness of the equipment, it effectively delivers hot air downwards in heating mode and preferentially diffuses cold air upwards in cooling mode. Combined with the natural convection law of rising hot air and sinking cold air, it creates a carpet-like heating effect and a waterfall-like cooling effect. This dynamic airflow adjustment method significantly improves the uniformity of temperature field distribution compared to a fixed airflow mode. In other words, this solution effectively solves the problem of low heating efficiency caused by fixed airflow direction in ceiling-mounted air conditioners by intelligently switching the airflow direction between heating and cooling modes, and avoids direct cold air blowing in cooling mode to improve comfort.

[0023] Furthermore, since the air output efficiency is low when the impeller rotates in the reverse direction, by configuring two impellers, the first impeller can drive air downward from the first air outlet in the first operating state of forward rotation, and the second impeller can drive air out in all directions from the second air outlet in the second operating state of forward rotation, which has a higher air supply efficiency. This further improves the overall energy efficiency ratio of the ceiling-mounted air conditioner and helps the ceiling-mounted air conditioner to have a larger air supply distance and air volume in both cooling and heating conditions. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0025] To more clearly illustrate the technical solutions in the embodiments of this application 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.

[0026] 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.

[0027] Figure 1 This is a structural schematic diagram of a ceiling-mounted air conditioner in a related technical solution;

[0028] Figure 2 This is a schematic diagram of a ceiling-mounted air conditioner in heating mode, provided as an embodiment of this application.

[0029] Figure 3 This is a schematic diagram of a ceiling-mounted air conditioner in cooling mode, provided in an embodiment of this application.

[0030] Figure 4 for Figure 3 A schematic diagram of a wind turbine assembly shown in the figure;

[0031] Figure 5 for Figure 2 A schematic diagram of a wind turbine assembly shown in the figure;

[0032] Figure 6 for Figure 4 A partially enlarged schematic diagram of the wind turbine assembly at the third gear;

[0033] Figure 7 for Figure 4 A partially enlarged schematic diagram of the wind turbine assembly at the third drive wheel;

[0034] Figure 8 A schematic diagram of the electrical connections of the main control component of a ceiling-mounted air conditioner provided in an embodiment of this application;

[0035] Figure 9 This is a schematic diagram of the structure of a control device for a ceiling-mounted air conditioner provided in an embodiment of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100. Indoor unit; 10. Casing; 11. First air vent; 12. Second air vent; 13. First air guide cavity; 131. Upper chamber; 132. Lower chamber; 133. Ventilation outlet; 14. Second air guide cavity; 20. Indoor heat exchanger; 30. Fan assembly; 31. First impeller; 32. Second impeller; 33. Drive fan; 341. First gear; 342. Second gear; 343. Third gear; 344. First bushing; 345. Second bushing; 346. Drive shaft; 35. Gear shifter; 351. 352. First transmission gear; 353. Second transmission gear; 354. Drive component; 355. Track component; 356. First switching component; 357. First strip tooth; 358. Second switching component; 359. Second strip tooth; 350. Third transmission gear; 351. First connecting rod; 352. Second connecting rod; 353. Third connecting rod; 354. Fourth connecting rod; 3585. Drive rod; 36. Main control module; 361. Processor; 362. Communication interface; 363. Memory; 364. Communication bus. Detailed Implementation

[0038] 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.

[0039] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. 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 this application. 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.

[0040] 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.

[0041] Ceiling-mounted air conditioners, as a typical type of embedded air conditioner, are widely used in commercial spaces such as shopping malls, hotels, and offices due to their advantages such as being able to be installed in the ceiling, not occupying indoor floor space, and having a simple and aesthetically pleasing appearance. For example... Figure 1 As shown, traditional ceiling-mounted air conditioners generally employ a fixed airflow design, using a single airflow organization method of bottom intake and top exhaust in both cooling and heating modes. This structure has significant physical limitations: in heating mode, hot air, being less dense, naturally rises, and since the air conditioner's outlet is located at the top, hot air tends to accumulate in the upper part of the room, hindering effective circulation. This contradiction between physical characteristics and the fixed airflow design leads to uneven indoor temperature distribution, low temperature regulation efficiency, and severely impacts user comfort.

[0042] Based on this, please refer to Figures 1 to 9 This application provides a ceiling-mounted air conditioner and its control method, aiming to solve the problem that hot air from the indoor unit of the ceiling-mounted air conditioner will concentrate in the top space of the room during heating mode, resulting in poor heating effect.

[0043] Firstly, such as Figure 2 and Figure 3As shown in the illustration, this application provides a ceiling-mounted air conditioner, including an indoor unit 100. The indoor unit 100 has a ceiling-mounted structure and includes a casing 10, an indoor heat exchanger 20, and a fan assembly 30. The casing 10 has a first air outlet 11 and a second air outlet 12. The first air outlet 11 is downward-facing, and the air outlet angle of the second air outlet 12 forms an angle with the vertical direction. The indoor heat exchanger 20 and the fan assembly 30 are disposed inside the casing 10. The fan assembly 30 is configured such that: in heating mode, the fan assembly 30 is in a first operating state to drive airflow sequentially through the second air outlet 12 and the indoor heat exchanger 20, and to blow airflow out from the first air outlet 11; in cooling mode, the fan assembly 30 is in a second operating state to drive airflow sequentially through the first air outlet 11 and the indoor heat exchanger 20, and to blow airflow out from the second air outlet 12.

[0044] The ceiling-mounted structure refers to the installation method where the main body of the indoor unit 100 is embedded in the building ceiling. It can be integrated with the building structure through a pre-embedded installation frame, providing a good decorative effect. The first air vent 11 is positioned downwards to form a near-vertical air duct, allowing air to enter and exit downwards. The second air vent 12 has an angle between its outlet angle and the vertical direction (or the up-down direction), allowing it to achieve a near-horizontal air outlet effect through the air guide plate, and also allowing air to enter. The indoor heat exchanger 20 and fan assembly 30 are mounted on the casing 10, enabling the fan assembly 30 to drive airflow through the indoor heat exchanger 20 for cooling or heating.

[0045] Based on this, in order to solve the above-mentioned technical problems, the fan assembly 30 in this embodiment is configured to have a first operating state and a second operating state. When the indoor unit 100 is in heating mode, the fan assembly 30 is in the first operating state, driving airflow from the second air outlet 12 into the casing 10, which, after being heated by the indoor heat exchanger 20, is blown vertically downwards from the first air outlet 11. This helps to create a carpet-like heating effect and utilizes the natural rising characteristics of hot air to form circulating convection to improve the uniformity of temperature distribution.

[0046] When the indoor unit 100 is in cooling mode, the fan assembly 30 is in its second operating state, drawing indoor air in through the first air vent 11, cooling it through the indoor heat exchanger 20, and then blowing it out through the second air vent 12. Due to the design of the air guide plate or the air outlet angle of the second air vent 12, the cool air is blown into the room in a nearly horizontal manner. This allows the cool air to diffuse along the ceiling and then naturally sink, creating a waterfall-like cooling effect, avoiding direct airflow onto people while achieving rapid cooling and improving the uniformity of temperature distribution.

[0047] Traditional ceiling-mounted air conditioners only have unidirectional airflow and cannot optimize airflow organization according to heating and cooling load characteristics. This solution achieves a reversible airflow path design through the configuration of the fan assembly 30. While maintaining the compactness of the equipment, it effectively delivers hot air downwards in heating mode and preferentially diffuses cold air upwards in cooling mode. Combined with the natural convection law of rising hot air and sinking cold air, it creates a carpet-like heating effect and a waterfall-like cooling effect. This dynamic airflow adjustment method significantly improves the uniformity of temperature field distribution compared to a fixed airflow mode. In other words, this solution effectively solves the problem of low heating efficiency caused by fixed airflow direction in ceiling-mounted air conditioners by intelligently switching the airflow direction between heating and cooling modes, and avoids direct cold air blowing in cooling mode to improve comfort.

[0048] There are several ways to change the airflow direction in the indoor unit 100 using the fan assembly 30. For example, by switching between the air duct and the air guide plate, the indoor air can be blown out from the first air outlet 11 or the second air outlet 12 after flowing through the indoor heat exchanger 20. Alternatively, the rotation direction of the fan impeller can be adjusted to change the airflow direction inside the casing 10.

[0049] In some embodiments, such as Figure 2 and Figure 3 As shown, the fan assembly 30 includes a first impeller 31 and a second impeller 32 disposed within the casing 10. In a first operating state, the first impeller 31 rotates to drive airflow out of the first air outlet 11, allowing indoor air to flow sequentially through the second air outlet 12, the indoor heat exchanger 20, and the first air outlet 11. In a second operating state, the second impeller 32 rotates to drive airflow out of the second air outlet 12, allowing indoor air to flow sequentially through the first air outlet 11, the indoor heat exchanger 20, and the second air outlet 12.

[0050] In heating mode, the first impeller 31 drives airflow out of the first air outlet 11. In cooling mode, the second impeller 32 drives airflow out of the second air outlet 12. The independent rotation of the first and second impellers 31 and 32 can be controlled by configuring different motors at the first and second impellers 31 and 32 respectively. Alternatively, a speed-switching component can be used to independently control the rotation of the first and second impellers 31 and 32; this is not limited.

[0051] For example, both the first impeller 31 and the second impeller 32 can be configured as centrifugal impellers. Alternatively, the first impeller 31 and the second impeller 32 can be any structure of centrifugal impeller or axial impeller.

[0052] Since the air output efficiency is low when the impeller rotates in the reverse direction, by configuring two impellers, the first impeller 31 and the second impeller 32, the first impeller 31 can drive air to blow downward from the first air outlet 11 in the first operating state of forward rotation, and the second impeller 32 can drive air to blow out to all directions from the second air outlet 12 in the second operating state of forward rotation, which has a higher air supply efficiency. This further improves the overall energy efficiency ratio of the ceiling-mounted air conditioner and helps the ceiling-mounted air conditioner to have a larger air supply distance and air volume in both cooling and heating conditions.

[0053] like Figure 3 and Figure 4 As shown, both the first impeller 31 and the second impeller 32 can be configured as centrifugal impellers. Along the vertical direction, the first air outlet 11, the first impeller 31, and the second impeller 32 are arranged sequentially from bottom to top. Thus, when the first impeller 31 rotates to drive air downwards from the first air outlet 11, it will not be obstructed by the second impeller 32. When the second impeller 32 rotates to drive air out from the second air outlet 12, the air blown out by the second impeller 32 will not be obstructed by the first impeller 31.

[0054] Furthermore, the centrifugal impeller features high wind pressure and a compact structure, which is beneficial for increasing the air outlet distance and for the miniaturized and compact design of the indoor unit 100.

[0055] In some other embodiments, since the first air outlet 11 is located directly below the first impeller 31, the first impeller 31 can also be configured as an axial flow impeller, which has the advantages of large flow rate and simple structure, thereby improving air outlet efficiency and air volume.

[0056] In some embodiments, such as Figure 2 and Figure 3 As shown, there are multiple second air vents 12, which are located outside the first air vent 11. That is, at least two or more second air vents 12 are distributed at intervals around the first air vent 11. The first air vent 11 is located directly below the housing 10, and the second air vents 12 are located around the first air vent 11.

[0057] Thus, the first air vent 11 is positioned downwards so that indoor air can flow upwards into the casing 10 through the first air vent 11 in cooling mode. Alternatively, indoor air can also be blown downwards from the first air vent 11 in heating mode.

[0058] The opening direction of the second air vent 12 can be set downwards. In this case, a guide vane is provided at the second air vent 12 to adjust the air outlet angle of the second air vent 12, so that the cold air blown out by the second air vent 12 in cooling mode can be blown out towards the periphery of the indoor unit 100, thereby forming a waterfall-like cooling effect. Alternatively, the opening direction of the second air vent 12 can be set horizontally outwards, or at an angle to the vertical direction and outwards; there is no limitation on this.

[0059] Taking a case where both the first impeller 31 and the second impeller 32 are centrifugal impellers as an example, the axial air inlet side of the first impeller 31 faces the second impeller 32. The second impeller 32 can have air inlet on both sides along the axial direction, or it can have its axial air inlet side facing the first impeller 31.

[0060] Continue to refer to Figure 2 and Figure 3 The casing 10 contains a first guide cavity 13 and a second guide cavity 14, with the second guide cavity 14 communicating with the second air outlet 12. The first guide cavity 13 includes an upper chamber 131 and a lower chamber 132, with a vent 133 between the upper chamber 131 and the lower chamber 132. The lower chamber 132 communicates with the first air outlet 11, and a first impeller 31 is disposed within the lower chamber 132, with the air inlet side of the first impeller 31 facing upward and adapted to the vent 133. The upper chamber 131 and the second guide cavity 14 are connected via an indoor heat exchanger 20, with the second impeller 32 located within the upper chamber 131.

[0061] For example, within the casing 10, the second guide cavity 14 is located outside and surrounds the first guide cavity 13. Multiple spaced connecting ribs can be provided within the second guide cavity 14 to improve the structural strength of the casing 10. A continuous or spaced notch is provided between the upper chamber 131 and the second guide cavity 14 for installing the indoor heat exchanger 20. That is, the second impeller 32 is located inside the indoor heat exchanger 20, so that the air outlet side of the centrifugal structure of the second impeller 32 faces the indoor heat exchanger 20. Driven by the second impeller 32, indoor air flows sequentially through the first air outlet 11, the lower chamber 132, the first impeller 31, the vent 133, the upper chamber 131, the second impeller 32, the indoor heat exchanger 20, and the second guide cavity 14, and is blown out through the second air outlet 12.

[0062] The first impeller 31 is axially oriented upwards and is adapted to the vent 133. Specifically, the vent 133 can be slightly larger or smaller than the air inlet side of the first impeller 31, allowing the forward-rotating first impeller 31 to drive indoor air sequentially through the second air inlet 12, the second guide cavity 14, the indoor heat exchanger 20, the upper chamber 131, the vent 133, the lower chamber 132, and the first impeller 31, before being blown downwards from the first air inlet 11. The adapted arrangement of the vent 133 prevents the forward-rotating first impeller 31 from drawing air from the lower chamber 132, ensuring that indoor air flows smoothly from the second air inlet 12 to the indoor heat exchanger 20 within the casing 10 and is then blown downwards from the first air inlet 11.

[0063] Thus, through the partitioned design of the second guide cavity 14, upper chamber 131, lower chamber 132, and vent 133, the airflow path is clearly defined, avoiding airflow interference in different modes. The layered arrangement of the first impeller 31 and the second impeller 32 further optimizes space utilization while ensuring efficient and smooth airflow in both modes. In heating mode, it helps hot air form a carpet-like heating effect and utilizes the natural rising characteristics of hot air to form circulating convection to improve the uniformity of temperature distribution. In cooling mode, after the cold air diffuses along the ceiling, it naturally sinks to form a waterfall-like cooling effect, avoiding direct airflow onto the human body while achieving rapid cooling to improve the uniformity of temperature distribution.

[0064] It should be noted that in the heating mode, within the lower chamber 132, the first impeller 31 of the centrifugal structure rotates with the airflow direction approximately perpendicular to the vertical direction. In this case, a guide wall can be provided around the lower chamber 132 to guide the airflow blown horizontally by the first impeller 31 to change direction and blow it downwards along the periphery of the first air outlet 11.

[0065] To facilitate switching between the first and second operating states of the fan assembly 30. For example... Figure 4 and Figure 5 As shown, the fan assembly 30 includes a drive fan 33, a first gear 341, a second gear 342, a third gear 343, and a gear shifter 35. The first gear 341 is coaxially connected to the first impeller 31, the second gear 342 is coaxially connected to the second impeller 32, and the third gear 343 is connected to the output end of the drive fan 33. The gear shifter 35 is configured to have a first gear and a second gear. In a first operating state, the gear shifter 35 is in the first gear, and the first gear 341 and the third gear 343 are drive-connected. In a second operating state, the gear shifter 35 is in the second gear, and the second gear 342 and the third gear 343 are drive-connected.

[0066] The drive fan 33 refers to the rotating device that provides power. It can drive the third gear 343 to rotate via a motor and transmit power to the first gear 341 or the second gear 342. The first gear 341 is connected to the first impeller 31 and can be a helical or spur gear structure to transmit the rotational power of the third gear 343 to the first impeller 31. The second gear 342 is connected to the second impeller 32 and can be a helical or spur gear structure to transmit the rotational power of the third gear 343 to the second impeller 32. The third gear 343 can be a spur gear or helical gear with a matching structure, or the first gear 341, second gear 342, and third gear 343 can be configured with a splined matching gear structure. The gear shifter 35 refers to the mechanism that changes the gear meshing state. It can adjust the meshing state of the third gear 343 through various driving and switching methods.

[0067] In heating mode, the gear selector 35 switches to the first gear, engaging the first gear 341 with the third gear 343. The axial position of either the first gear 341 or the third gear 343 can be changed, or their meshing can be achieved through a third gear structure. This drives the fan 33 to rotate the third gear 343, transmitting power through the first gear 341 to the first impeller 31, causing it to rotate and generate a downward-blowing heating airflow. At this time, the second gear 342 disengages from the third gear 343, and the second impeller 32 remains stationary or rotates under the influence of the air; this is not limited.

[0068] In cooling mode, the gear selector 35 switches to the second gear, engaging the second gear 342 with the third gear 343. This changes the axial position of either the second gear 342 or the third gear 343, or the meshing transmission can be achieved through a third gear structure. At this time, the drive fan 33 rotates the third gear 343, and power is transmitted through the second gear 342 to the second impeller 32, driving the second impeller 32 to rotate and blow cold air out of the second air outlet 12. Simultaneously, the first gear 341 disengages from the third gear 343, and the first impeller 31 remains stationary or rotates under the influence of the air; this is not limited.

[0069] This solution, through a combination of gear transmission and a gear shifter 35, requires only a single drive fan 33 to achieve selective drive of the dual impellers, significantly simplifying the mechanical structure while ensuring the airflow direction switching function. Specifically, the mechanical linkage design of gear transmission and gear shifting enables independent drive of different impellers in cooling and heating modes. This ensures that hot air in heating mode is blown downwards through the first air vent 11, while cold air in cooling mode is blown outwards to the top and around the perimeter through the second air vent 12. This structure reduces the number of drive components while maintaining the airflow direction switching function, thereby lowering equipment manufacturing costs and the probability of failure.

[0070] For example, such as Figure 5 and Figure 6 As shown, along the axial direction of the third gear 343, the first gear 341 and the second gear 342 are spaced apart on opposite sides of the third gear 343. The first impeller 31 is located on the side of the first gear 341 away from the third gear 343, and the second impeller 32 is located on the side of the second gear 342 away from the third gear 343.

[0071] Thus, by sequentially arranging a first gear 341 and a second gear 342 on both sides of the axial direction of the third gear 343, the axial positions of the first gear 341 and the second gear 342 can be adjusted to mesh and drive with the third gear 343 via a spline structure, used for switching between the first and second gears. At this time, the first gear 341, while coaxially connected to the first impeller 31, can also move axially relative to the first impeller 31 to switch the first gear. Correspondingly, the second gear 342, while coaxially connected to the second impeller 32, can also move axially relative to the second impeller 32 to switch the second gear. Alternatively, the third gear 343 can be slidably arranged axially to mesh with either the first gear 341 or the second gear 342; this is not limited.

[0072] Alternatively, a third-party gear structure can be added so that the first gear 341 (or the second gear 342) meshes with the third gear 343 through the third-party gear structure, thereby driving the first impeller 31 or the second impeller 32 to rotate. This is not limited.

[0073] In some embodiments, such as Figure 6 As shown, the fan assembly 30 includes a first bushing 344, a second bushing 345, and a drive shaft 346. The two ends of the first bushing 344 are connected to a first gear 341 and a first impeller 31, and the two ends of the second bushing 345 are connected to a second gear 342 and a second impeller 32. The drive shaft 346 is inserted into the first bushing 344 and the second bushing 345, and is connected to the output end of the drive fan 33. A third gear 343 is disposed between the first bushing 344 and the second bushing 345 and is coaxially connected to the drive shaft 346.

[0074] For example, the first bushing 344 refers to a tubular structure connecting the first gear 341 and the first impeller 31, used to transmit power and maintain coaxial rotation. The second bushing 345 refers to a tubular structure connecting the second gear 342 and the second impeller 32. The first bushing 344 and the second bushing 345 can be made of metal or high-strength plastic to achieve stability in power transmission.

[0075] By arranging the drive shaft 346 through the first bushing 344 and the second bushing 345, the first gear 341, the second gear 342, and the third gear 343 can rotate independently without interfering with each other while being axially spaced. Furthermore, the drive fan 33 can drive the first gear 341, the second gear 342, the first impeller 31, and the second impeller 32 to rotate coaxially via the drive shaft 346 and the third gear 343, thereby reducing vibration and energy loss.

[0076] For example, the first bushing 344 and the second bushing 345 respectively connect the first impeller 31 and the second impeller 32 to the corresponding first gear 341 and second gear 342. The drive shaft 346, as the core transmission component, passes through the two bushings. The power output from the drive fan 33 is transmitted to the third gear 343 through the drive shaft 346. The third gear 343 further drives the first gear 341 or the second gear 342 to rotate. In heating mode, the meshing first gear 341 drives the first impeller 31 to rotate through the first bushing 344, so that the airflow is blown downward from the first air outlet 11. In cooling mode, the meshing second gear 342 drives the second impeller 32 to rotate through the second bushing 345, so that the airflow is blown laterally from the second air outlet 12. The insertion and engagement of the bushings and the drive shaft 346 simplifies the transmission structure and avoids the space occupation and assembly complexity caused by multi-axis independent drive.

[0077] This solution achieves coaxial drive of the two impellers through the cooperation of a single drive shaft and two bushings, reducing the number of transmission components and lowering friction loss. Simultaneously, the centrally positioned third gear 343 ensures balanced power distribution, improving system reliability and stability. This results in a compact structure and improved transmission efficiency, while also helping to reduce manufacturing costs and operating noise.

[0078] In some embodiments, such as Figure 6 and Figure 7 As shown, the gear shifter 35 includes a first transmission gear 351, a second transmission gear 352, and a drive member 353. The drive member 353 is configured such that: in the first gear position, the drive member 353 drives the first transmission gear 351 to mesh with the first gear 341 and the third gear 343; in the second gear position, the drive member 353 drives the second transmission gear 352 to mesh with the second gear 342 and the third gear 343.

[0079] The first transmission gear 351 refers to the gear assembly used to transmit power in the first gear position, and the second transmission gear 352 refers to the gear assembly used to transmit power in the second gear position. The first transmission gear 351 establishes a power transmission path between the first gear 341 and the third gear 343, and the second transmission gear 352 establishes a power transmission path between the second gear 342 and the third gear 343. The drive unit 353 can be a linear motor, a rotary motor, an electromagnetic drive structure, or a cylinder structure, capable of driving the first transmission gear 351 and the second transmission gear 352 to switch between the first and second gear positions. It is an actuator used to control the position changes of the transmission gears, so as to push the transmission gears into or out of engagement through linear displacement.

[0080] When the air conditioner is in heating mode, the drive component 353 pushes the first transmission gear 351 to move linearly, causing it to mesh with both the first gear 341 and the third gear 343, i.e., in the first gear position. At this time, the rotational power of the third gear 343 is transmitted to the first gear 341 through the first transmission gear 351, thereby driving the first impeller 31 to rotate. When the air conditioner is in cooling mode, the drive component 353 disengages the first transmission gear 351 and pushes the second transmission gear 352 to a position where it meshes with the second gear 342 and the third gear 343. At this time, the rotational power of the third gear 343 is transmitted to the second gear 342 through the second transmission gear 352, driving the second impeller 32 to rotate. This achieves the switching adjustment between the first and second gear positions.

[0081] For example, the drive unit 353 can be two linear motors or two cylinders. One drive unit is connected to the first transmission gear 351 to drive the first transmission gear 351 into the meshing position in a linear direction, or to disengage it from the meshing position in the opposite direction. The other drive unit is connected to the second transmission gear 352 to drive the second transmission gear 352 into the meshing position in a linear direction, or to disengage it from the meshing position in the opposite direction.

[0082] Or, such as Figure 6 and Figure 7As shown, the gear shifter 35 also includes a track component 354, a first shifting component 355, a second shifting component 356, and a third transmission gear 357. The first shifting component 355 is slidably connected to the track component 354, and the first transmission gear 351 is rotatably connected to the first shifting component 355. The second shifting component 356 is slidably connected to the track component 354, and the second transmission gear 352 is rotatably connected to the second shifting component 356. The first shifting component 355 has a first tooth 3551 on the side facing the second shifting component 356, and the second shifting component 356 has a second tooth 3561 on the side facing the first shifting component 355. The first tooth 3551 and the second tooth 3561 are arranged along the length direction of the track component 354. The third transmission gear 357 is connected to the drive component 353, and the third transmission gear is meshed between the first tooth 3551 and the second tooth 3561. The drive unit 353 is a switching motor and is configured to: rotate the switching motor in the forward direction to drive the first transmission gear 351 to move to the meshing and mating position and to disengage the second transmission gear 352 from the meshing and mating position; and rotate the switching motor in the reverse direction to drive the first transmission gear 351 to disengage from the meshing and mating position and to move the second transmission gear 352 to the meshing and mating position.

[0083] The track component 354 is provided to guide the first switching component 355 and the second switching component 356 to slide along a predetermined path (or direction). Specifically, a slide rail or guide groove can be used as the track component to provide stable guidance for the movement of the switching components.

[0084] The first rack tooth 3551 and the second rack tooth 3561 refer to the rack structures respectively set on the opposite sides of the first switching member 355 and the second switching member 356. Specifically, they can adopt straight tooth or helical tooth tooth structures, which are used to mesh with the mating third transmission gear 357 to transmit power.

[0085] The third transmission gear 357 is connected to the output end of the switching motor and can be a cylindrical gear, bevel gear, spur gear, or helical gear that meshes with the rack gear. This causes the driving member 353 to drive the third transmission gear 357 to rotate, and simultaneously causes the first switching member 355 and the second switching member 356 to move in opposite directions. For example, the switching motor can be a stepper motor or a servo motor. When the switching motor rotates forward, it drives the first switching member 355 and the first transmission gear 351 towards the meshing and mating position, while the second switching member 356 and the second transmission gear 352 move away from the meshing and mating position. Conversely, when the switching motor rotates in the opposite direction, it drives the second switching member 356 and the second transmission gear 352 towards the meshing and mating position, while the first switching member 355 and the first transmission gear 351 move away from the meshing and mating position.

[0086] For example, when it is necessary to switch to the first gear, the switching motor rotates in the forward direction, driving the third transmission gear 357 to rotate. The third transmission gear 357 meshes with the first strip tooth 3551 and pushes the first switching member 355 to slide along the track member 354, so that the first transmission gear 351 meshes with the first gear 341 and the third gear 343. At the same time, the second strip tooth 3561 meshes with the third transmission gear 357 synchronously. The second switching member 356 and the second transmission gear 352 move in opposite directions to disengage from the meshing and mating position.

[0087] When it is necessary to switch to the second gear, the switching motor rotates in the opposite direction to drive the third transmission gear 357 to rotate in the opposite direction. The third transmission gear 357 meshes with the second strip tooth 3561 and pushes the second switching member 356 to slide along the track member 354, so that the second transmission gear 352 meshes with the second gear 342 and the third gear 343. At the same time, the first strip tooth 3551 meshes with the third transmission gear 357 synchronously. The first switching member 355 and the first transmission gear 351 move in opposite directions to disengage from the meshing and mating position.

[0088] Thus, through the adaptation of the mechanical structure, the first transmission gear 351 and the second transmission gear 352 can move synchronously in opposite directions under the drive of a drive component 353, so as to switch between the first gear and the second gear. While one of the first impeller 31 and the second impeller 32 is connected to the drive fan 33, the other is disconnected from the drive fan 33, thereby changing the air outlet direction of the indoor unit 100, so as to provide a better user experience in both heating and cooling modes. The structure is simple and compact.

[0089] Furthermore, such as Figure 6 and Figure 7 As shown, the gear shifter 35 also includes a first connecting rod 3581, a second connecting rod 3582, a third connecting rod 3583, and a fourth connecting rod 3584. The first connecting rod 3581 and the second connecting rod 3582 extend along the length of the track member 354. The first transmission gear 351 is rotatably connected to the first switching member 355 via the first connecting rod 3581, and the second transmission gear 352 is rotatably connected to the second switching member 356 via the second connecting rod 3582. One end of the third connecting rod 3583 is slidably connected to the track member 354, and the other end of the third connecting rod 3583 is fixedly connected to the first switching member 355. One end of the fourth connecting rod 3584 is slidably connected to the track member 354, and the other end of the fourth connecting rod 3584 is fixedly connected to the second switching member 356.

[0090] For example, such as Figure 7 As shown, the gear shifter 35 also includes a drive rod 3585. The drive component 353 is connected to the third transmission gear 357 via the drive rod 3585, which facilitates the flexible arrangement of the drive component 353.

[0091] The rotatable connection between the first transmission gear 351 and the first switching member 355 can be achieved through a rotatable connection between the first transmission gear 351 and the first connecting rod 3581, or through a rotatable connection between the first connecting rod 3581 and the first switching member 355. Similarly, the rotatable connection between the second transmission gear 352 and the second switching member 356 can be achieved through a rotatable connection between the second transmission gear 352 and the second connecting rod 3582, or through a rotatable connection between the second connecting rod 3582 and the second switching member 356. These rotatable connections can be achieved through an insertion connection between a shaft and a sleeve, or by using a bearing structure between the two components; there is no limitation on this.

[0092] The third connecting rod 3583 and the fourth connecting rod 3584 can be sequentially arranged along the length of the track component 354 and slidably connected to the track component 354, so that the sliding direction of the third connecting rod 3583 and the fourth connecting rod 3584 is restricted by the guide rail or guide rail groove on the track component 354, so that the first switching component 355 and the second switching component 356 can be slidably arranged along the length of the track component 354, thereby switching between the first gear and the second gear.

[0093] Based on this, by setting the first connecting rod 3581, the second connecting rod 3582, the third connecting rod 3583 and the fourth connecting rod 3584, the length of the connecting rods can be flexibly adjusted as needed within the first guide cavity 13 to adjust the installation position of the first switching component 355, the second switching component 356 and the driving component 353, which facilitates the flexible design and configuration of the components inside the housing 10.

[0094] It should be noted that, in the embodiments of this application, the structural shapes of the first gear 341, the second gear 342, the third gear 343, the first transmission gear 351, the second transmission gear 352, and the third transmission gear 357 can be flexibly configured as needed, such as spur gears, helical gears, worm gears, bevel gears, or bevel gears, as long as the corresponding gears can meet the meshing transmission requirements, and there is no limitation on this.

[0095] Secondly, embodiments of this application also provide a control method for a ceiling-mounted air conditioner, applied to the ceiling-mounted air conditioner mentioned in the first aspect. The control method includes the following steps:

[0096] Obtain the mode switching command from the air conditioner.

[0097] This mode switching command includes switching between cooling and heating modes. It can be a cooling switch while the air conditioner is running, or a mode synchronization command when the air conditioner is turned on.

[0098] If the mode switching command is to switch to heating mode, the control fan assembly is switched to the first operating state so that airflow flows in from the second air vent and blows out from the first air vent downwards.

[0099] For example, such as Figure 8 As shown, the indoor unit 100 also includes a main control module 36, which is electrically connected to the drive fan 33 and the drive component 353. When the mode switching command is to switch to the heating mode, the main control module 36 controls the drive component 353 to rotate forward, so that the first transmission gear 351 (e.g., Figure 5 (As shown) It meshes with the first gear 341 and the third gear 343, thereby driving the first impeller 31 to rotate and causing air to be blown downward from the first air outlet 11. This helps to create a carpet-like heating effect with hot air and utilizes the natural rising characteristics of hot air to form circulating convection to improve the uniformity of temperature distribution.

[0100] If the mode switching command is to switch to cooling mode, the control fan assembly is switched to the second operating state so that airflow enters from the first air vent and is blown out from the second air vent.

[0101] Correspondingly, when the mode switching command is to switch to cooling mode, the main control module 36 controls the drive component 353 to rotate in the opposite direction, so that the second transmission gear 352 meshes with the second gear 342 and the third gear 343, thereby driving the second impeller 32 to rotate and causing air to be blown out from the side of the second air outlet 12. This allows the cold air to diffuse along the ceiling and then naturally sink to form a waterfall-like cooling effect, avoiding direct airflow onto the human body while achieving rapid cooling and improving the uniformity of temperature distribution.

[0102] If the air conditioner is on, the drive fan 33 will start after switching to the first or second speed setting to rotate the first impeller 31 or the second impeller 32. If the air conditioner is running, the drive fan 33 can be stopped before switching to the first or second speed setting, and restarted after switching to the first or second speed setting to avoid gear jamming during speed switching.

[0103] Thirdly, such as Figure 9 As shown in the figure, this application embodiment provides a control device for a ceiling-mounted air conditioner, namely a main control module 36. The main control module 36 includes a processor 361, a communication interface 362, a memory 363, and a communication bus 364. The processor 361, communication interface 362, and memory 363 communicate with each other via the communication bus 364. The memory 363 is used to store computer programs.

[0104] In one embodiment of this application, when the processor 361 executes the computer program stored in the memory 363, it implements the operation steps of the control method for the ceiling-mounted air conditioner in the second aspect.

[0105] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the operation steps of the control method for a ceiling-mounted air conditioner as described in the second aspect.

[0106] 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.

[0107] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a general-purpose hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM (Read-Only Memory) / RAM (Random Access Memory), magnetic disk, optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of various embodiments or certain parts of embodiments. Although the terms first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may only be used to distinguish one element, component, region, layer, or section from another region, layer, or section. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used in this document 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.

[0108] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. 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 this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A ceiling-mounted air conditioner, characterized in that, Includes an indoor unit, which is a ceiling-mounted structure, and the indoor unit includes: The housing is provided with a first air vent and a second air vent, the first air vent is arranged downwards, and the air outlet angle of the second air vent is at an angle to the vertical direction; An indoor heat exchanger is disposed inside the casing; And a fan assembly, the fan assembly including a first impeller and a second impeller, the first impeller and the second impeller being disposed within the housing, the fan assembly being configured as follows: In heating mode, the fan assembly is in the first operating state and the first impeller rotates to drive the airflow through the second air outlet and the indoor heat exchanger in sequence, and to blow the airflow out from the first air outlet. In cooling mode, the fan assembly is in a second operating state and the second impeller rotates to drive the airflow through the first air outlet and the indoor heat exchanger in sequence, and to blow the airflow out from the second air outlet; The first impeller and the second impeller are centrifugal impellers; the casing is provided with a first guide cavity and a second guide cavity, and the second guide cavity is connected to the second air outlet; The first flow guiding cavity includes an upper chamber and a lower chamber, with a vent provided between the upper chamber and the lower chamber; the lower chamber is connected to the first air outlet, and the first impeller is disposed in the lower chamber with the air inlet side of the first impeller facing upward and adapted to the vent; the upper chamber and the second flow guiding cavity are connected through the indoor heat exchanger, and the second impeller is located in the upper chamber; Along the axial direction of the second impeller, the first air outlet, the first impeller, the vent, and the second impeller are arranged sequentially from bottom to top, and along the radial direction of the second impeller, the second guide cavity is located outside the upper chamber.

2. The ceiling-mounted air conditioner according to claim 1, characterized in that, The wind turbine assembly includes: Drive the fan; The first gear is coaxially connected to the first impeller; The second gear is coaxially connected to the second impeller; The third gear is connected to the output end of the drive fan; and a gear shifter, the gear shifter being configured to: In the first operating state, the gear switch is in the first gear position, and the first gear and the third gear are connected in a transmission connection; In the second operating state, the gear shifter is in the second gear position, and the second gear is connected to the third gear in a transmission connection.

3. The ceiling-mounted air conditioner according to claim 2, characterized in that, The gear shifter includes a first transmission gear, a second transmission gear, and a driving component, wherein the driving component is configured as follows: In the first gear position, the driving component drives the first transmission gear to mesh with the first gear and the third gear; In the second gear position, the drive unit drives the second transmission gear to mesh with the second gear and the third gear.

4. The ceiling-mounted air conditioner according to claim 3, characterized in that, The gear shifter also includes: Track components; A first switching component is slidably connected to the track component, and a first transmission gear is rotatably connected to the first switching component; The second switching component is slidably connected to the track component, and the second transmission gear is rotatably connected to the second switching component; the first switching component has a first strip tooth on the side facing the second switching component, and the second switching component has a second strip tooth on the side facing the first switching component, and the first strip tooth and the second strip tooth are arranged along the length direction of the track component; And a third transmission gear, which is connected to the driving member and meshes between the first strip tooth and the second strip tooth; The drive unit is a switching motor and is configured as follows: The switching motor rotates in the forward direction to move the first transmission gear to the meshing and fitting position, and to disengage the second transmission gear from the meshing and fitting position. The switching motor rotates in the opposite direction to disengage the first transmission gear from its meshing position and move the second transmission gear to its meshing position.

5. The ceiling-mounted air conditioner according to claim 4, characterized in that, The gear shifter also includes: A first connecting rod extends along the length of the track component, and the first transmission gear is rotatably connected to the first switching component through the first connecting rod. The second connecting rod extends along the length of the track component, and the second transmission gear is rotatably connected to the second switching component through the second connecting rod. The third connecting rod has one end slidably connected to the track component and the other end fixedly connected to the first switching component; And a fourth connecting rod, one end of which is slidably connected to the track component, and the other end of which is fixedly connected to the second switching component.

6. The ceiling-mounted air conditioner according to any one of claims 2-5, characterized in that, Along the axial direction of the third gear, the first gear and the second gear are spaced apart on opposite sides of the third gear, the first impeller is located on the side of the first gear away from the third gear, and the second impeller is located on the side of the second gear away from the third gear.

7. The ceiling-mounted air conditioner according to claim 6, characterized in that, The wind turbine assembly includes: The first bushing has two ends connected to the first gear and the first impeller; The second bushing has two ends connected to the second gear and the second impeller; The transmission shaft is inserted into the first bushing and the second bushing and is connected to the output end of the drive fan. The third gear is disposed between the first bushing and the second bushing and is coaxially connected to the transmission shaft.

8. The ceiling-mounted air conditioner according to any one of claims 1-5, characterized in that, There are multiple second air vents, and multiple second air vents are set outside the first air vent.

9. A control method for a ceiling-mounted air conditioner, characterized in that, The control method, applied to the ceiling-mounted air conditioner as described in any one of claims 1-8, comprises: Obtain the mode switching command from the air conditioner; If the mode switching command is to switch to heating mode, control the fan assembly to switch to the first operating state so that airflow flows in from the second air outlet and blows out downward from the first air outlet; If the mode switching command is to switch to cooling mode, the fan assembly is controlled to switch to the second operating state so that airflow flows in from the first air outlet and is blown out from the second air outlet.

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