An air duct structure and a ducted fan machine comprising the same

Abstract

The utility model provides a kind of air duct structure and contain its ducted air conditioner, it is related to air conditioning technical field, solve the technical problem that single air outlet of ducted air conditioner needs to dismount suspended ceiling and replace air outlet in different seasons.The air duct structure includes volute, centrifugal fan blade, first air outlet, second air outlet, volute tongue, switching assembly;Centrifugal fan blade is arranged in volute inner chamber middle part, to form first air duct and second air duct respectively in its two sides;First air outlet is communicated with first air duct;Second air outlet is communicated with second air duct;Volute tongue is installed in volute inner chamber by switching assembly, to open any one in two air ducts.This utility model drives volute tongue to rotate by switching assembly, makes volute tongue switch between first air duct and second air duct Conducting state, to realize the alternate air supply of horizontal and vertical direction, can realize the quick conversion of two air outlet air outlet for different mode requirements, to reach the air supply effect of bathing type refrigeration and carpet type heating, improve user comfort.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to a duct structure and a duct air conditioner containing the same. Background Technology

[0002] Currently, ducted air conditioners generally control airflow in one direction only because the air outlet panel needs to match the room decoration. Although ducted air conditioners have two air outlets, only one can be selected when in use, meaning that only one horizontal or vertical direction of air is delivered at any given time. This leads to the awkward situation of hot air not reaching the ground in winter or cold air freezing your feet in summer.

[0003] To solve this problem, you can either disassemble and replace the air vents in the ceiling when the season changes, or add a new air guide plate to the ceiling. However, adding an air guide plate not only makes the structure more complicated, but also increases the number of control components. In addition, the air delivery angle is limited, and it is still impossible to fully achieve the air delivery effect of shower-style cooling and carpet-style heating. Utility Model Content

[0004] The purpose of this utility model is to provide a rotatable air duct structure and an air duct machine containing it, so as to solve the technical problem in the prior art that the single air outlet of the air duct machine needs to be disassembled and the ceiling needs to be replaced in different seasons.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This utility model provides an air duct structure, including a volute, a centrifugal fan blade, a first air outlet, a second air outlet, a volute tongue, and a switching assembly; wherein: The centrifugal fan blades are disposed in the middle of the inner cavity of the volute to form a first air duct and a second air duct on both sides of the volute, respectively. The first air outlet is connected to the first air duct; The second air outlet is connected to the second air duct; The volute tongue is installed in the inner cavity of the volute via the switching assembly to open either of the two air ducts.

[0006] The air duct structure of this utility model drives the volute tongue to rotate through a switching component, allowing the volute tongue to switch between the first and second air ducts, thereby achieving alternating air supply in the horizontal and vertical directions. It can quickly switch the air outlets of the two vents to meet different mode requirements, thus achieving the air supply effect of shower-like cooling and carpet-like heating, improving user comfort.

[0007] As a further improvement of this utility model, the volute tongue has a semi-cylindrical structure.

[0008] The volute of this invention has a semi-cylindrical structure, and its arc-shaped surface maintains a constant gap with the outer edge of the centrifugal fan blade, which effectively guides the airflow direction and reduces vortex loss.

[0009] As a further improvement of this utility model, the switching component includes a motor and a transmission structure; wherein: The motor is connected to the volute tongue via the transmission structure, and can drive the volute tongue to rotate in the inner cavity of the volute.

[0010] This invention utilizes a motor and transmission structure to achieve precise rotation control of the volute, automatically switching the air duct according to cooling or heating modes, thus improving energy efficiency and air delivery accuracy. The transmission structure, consisting of a gear set or worm gear mechanism, ensures smooth operation and low noise. In cooling mode, the volute rotates to the first air duct opening position, achieving horizontal air delivery from the top, with cool air diffusing along the ceiling to avoid direct airflow onto people. In heating mode, the volute switches to the second air duct, delivering air vertically downwards, with hot air reaching the floor directly for carpet-like heating. The entire switching process requires no manual intervention, is compatible with intelligent control systems, and is suitable for the diverse needs of modern homes and commercial spaces.

[0011] As a further improvement of this utility model, the transmission structure includes a gear set and a rack; wherein: The rack is fixed to one end of the axial direction of the volute tongue; The gear set is connected to the motor and the rack, respectively.

[0012] In this invention, the gear set converts the rotational motion of the motor into the rotational motion of the rack around its axis, thereby driving the volute tongue to rotate around its axis, achieving precise control of duct switching. The rack and gear set mesh stably, resulting in high transmission efficiency and ensuring the volute tongue accurately stops at two limit positions within its semi-circular trajectory, guaranteeing complete connection or closure of the first and second air ducts. This structure facilitates the integration of position sensors, enabling feedback closed-loop control of the switching state and further enhancing the system's intelligence. The overall structure is compact, suitable for space-constrained indoor unit designs, balancing performance and reliability.

[0013] As a further improvement of this utility model, the switching component also includes limiting members installed at both ends of the worm tongue axis.

[0014] This invention, by setting a limiting component, ensures that the volute tongue will not deviate during rotation and can accurately stop at two preset working positions, thus ensuring the repeatability and sealing of the air duct switching.

[0015] As a further improvement of this utility model, the limiting member includes a limiting groove disposed on the inner wall of the volute for limiting the sliding connection of the volute tongue, an axial limiting wheel and a radial limiting wheel abutting against the inner wall of the volute.

[0016] As a further improvement of this utility model, the limiting groove is formed by folding the edge of the volute; the shape of the limiting groove is the same as the rotation path of the volute tongue.

[0017] This invention utilizes a limiting groove, an axial limiting wheel, and a radial limiting wheel to not only lock the worm tongue position and ensure smooth and stable movement, but also effectively suppress vibration and sway, improving structural durability. The limiting groove aligns with the worm tongue's rotation path, ensuring precise alignment of the motion trajectory and preventing jamming or interference. The axial limiting wheel constrains the worm tongue's axial movement, while the radial limiting wheel controls its radial runout; this dual limiting mechanism ensures stable operation of the worm tongue during high-frequency reciprocating switching. The limiting wheels also effectively reduce frictional resistance during worm tongue rotation, extending the service life of transmission components. Simultaneously, in conjunction with the gear set, they achieve position control, ensuring error-free air duct switching. The limiting groove is integrally formed from the worm housing with folded edges, resulting in a robust structure that saves space and facilitates mass production and assembly.

[0018] As a further improvement of this utility model, the number of axial limiting wheels is two, which are installed at both ends of the circumferential direction of the worm tongue.

[0019] This invention effectively balances the axial force on the volute tongue during rotation by setting axial limiting wheels at both ends, preventing unilateral load distribution or axial movement. The two limiting wheels are symmetrically arranged on the circumference of the volute tongue and fit tightly with the inner wall of the volute casing, further improving rotational stability and structural rigidity.

[0020] As a further improvement of this utility model, the radial limiting wheels are of several kinds and are spaced apart along the circumferential direction of the worm tongue.

[0021] As a further improvement of this utility model, it also includes a sealing strip disposed on the inner wall of the volute.

[0022] To ensure a good seal, a sealing strip is installed on the side away from the motor to seal the channel between the volute tongue and the volute housing. The sealing strip is made of elastic material and fits the edge contour of the volute tongue. It achieves a seamless seal through an interference fit, effectively preventing air leakage.

[0023] As a further improvement of this utility model, the first air outlet is a horizontal air outlet.

[0024] As a further improvement of this utility model, the second air outlet is a vertical air outlet.

[0025] This utility model provides a duct air conditioner, including the aforementioned duct structure.

[0026] In this duct air conditioner, the axial and radial limiting wheels work together during the rotation of the volute tongue to ensure stable positioning along the rotation path and prevent displacement due to airflow impact. The limiting groove, in conjunction with the sliding connection structure, guides the volute tongue along a preset trajectory, improving switching accuracy. A sealing strip forms a seal between the volute tongue and the inner wall of the volute housing, preventing air leakage and improving airflow utilization. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a structural schematic diagram of the duct air conditioner of this utility model; Figure 2 This is a three-dimensional structural diagram (a) of the volute tongue in the air duct structure of this utility model; Figure 3 This is a three-dimensional structural diagram (II) of the volute tongue in the air duct structure of this utility model; Figure 4 This is a front view of the volute tongue in the air duct structure of this utility model; Figure 5 This is a structural diagram of the duct air conditioner of this utility model when it is in a horizontal air outlet state; Figure 6 This is a structural diagram of the duct air conditioner of this utility model when it is in the vertical air outlet state; Figure 7 This is a structural diagram of the air duct structure of this utility model in the horizontal air supply state; Figure 8 This is a structural diagram of the air duct structure of this utility model when it is in the vertical air outlet state; Figure 9 This is the control logic diagram of the duct air conditioner of this utility model; Figure 10 This is a half-sectional view of the volute in the air duct structure of this utility model; Figure 11 This is a front sectional view of the duct air conditioner of this utility model.

[0029] In the picture: 1. First air outlet; 2. Second air outlet; 3. Cochlear tongue; 4. Gear rack; 5. Axial limiting wheel; 6. Radial limit wheel; 7. Pulleys; 9. Sealing strip; 10. Electric motor; 11. Gear set; 12. Install the limit plate; 100. Centrifugal fan blades; 200. Evaporator; 300. Snail shell; 301. Folded edge. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] Example 1: like Figures 1-9 As shown, this utility model provides an air duct structure, including a volute 300, a centrifugal fan blade 100, a first air outlet 1, a second air outlet 2, a volute tongue 3, and a switching assembly; wherein: Centrifugal fan blades 100 are disposed in the middle of the inner cavity of volute 300 to form a first air duct and a second air duct on both sides thereon, respectively. The first air outlet 1 is connected to the first air duct; specifically, the first air outlet 1 is a horizontal air outlet. The second air outlet 2 is connected to the second air duct; the second air outlet 2 is a vertical air outlet. The volute tongue 3 is installed in the inner cavity of the volute housing 300 via a switching component to open either of the two air ducts.

[0032] It should be noted that the volute tongue 3 can move to both sides of the centrifugal fan blade 100 under the drive of the switching component, so as to open the first air duct or the second air duct respectively, thereby realizing the horizontal air outlet 1 or the vertical air outlet 2.

[0033] The air duct structure of this utility model drives the volute tongue 3 to rotate through the switching component, so that the volute tongue 3 switches the conduction state between the first air duct and the second air duct, thereby realizing the alternating air supply in the horizontal and vertical directions. It can realize the rapid switching of the air outlets of the two air outlets according to different mode requirements, thereby achieving the air supply effect of shower-style cooling and carpet-style heating, and improving user comfort.

[0034] like Figures 2-4 As shown, considering the shape of the volute 300, in this embodiment, the volute tongue 3 is a semi-cylindrical structure.

[0035] The volute tongue 3 of this invention has a semi-cylindrical structure, and its arc-shaped surface maintains a constant gap with the outer edge of the centrifugal fan blade 100, which effectively guides the airflow direction and reduces eddy current loss.

[0036] As an optional embodiment of this utility model, such as Figures 2-6 As shown, the switching assembly includes a motor 10 and a transmission structure; wherein: The motor 10 is connected to the worm tongue 3 through a transmission structure, and can drive the worm tongue 3 to rotate in the inner cavity of the worm housing 300.

[0037] This invention utilizes the coordinated operation of the motor 10 and the transmission structure to achieve precise rotation control of the volute tongue 3, thereby automatically switching the air duct according to the cooling or heating mode, improving energy efficiency and air delivery accuracy. The transmission structure is a gear set 11 or a worm gear mechanism, ensuring smooth operation and low noise. In cooling mode, the volute tongue 3 rotates to the first air duct opening position, achieving horizontal air delivery from the top, with cool air diffusing along the ceiling to avoid direct airflow onto people; in heating mode, the volute tongue 3 switches to the second air duct, delivering air vertically downwards, with hot air reaching the floor directly, creating carpet-like heating. The entire switching process requires no manual intervention, is compatible with intelligent control systems, and is suitable for the diverse needs of modern homes and commercial spaces.

[0038] Specifically, the transmission structure includes a gear set 11 and a rack 4; wherein: Rack 4 is fixed to one axial end of volute tongue 3; The gear set 11 is connected to the motor 10 and the rack 4 respectively.

[0039] In this example, the gear set 11 includes three gears, one of which is connected to the output shaft of the motor 10, the second and third gears are coaxially arranged, the second gear meshes with the first gear, and the third gear meshes with the rack 4.

[0040] For easy fixing, the motor 10 is fixed inside the volute 300 by the mounting limit plate 12, and the shafts of the second and third gears in the gear set 11 are also fixed on the mounting limit plate 12.

[0041] In this invention, the gear set 11 converts the rotational motion of the motor 10 into the rotational motion of the rack 4 around its axis, thereby driving the volute tongue 3 to rotate around its axis, achieving precise control of duct switching. The rack 4 and gear set 11 mesh stably, resulting in high transmission efficiency and ensuring that the volute tongue 3 accurately stops at two limit positions within a semi-circular trajectory, guaranteeing complete connection or closure of the first and second ducts. This structure facilitates the integration of position sensors, enabling feedback closed-loop control of the switching state and further enhancing the system's intelligence. The overall structure is compact, suitable for space-constrained indoor unit designs, balancing performance and reliability.

[0042] To ensure the stability of the worm tongue 3 during movement, the switching assembly also includes a limiting member installed at the other end of the worm tongue 3 along its axis.

[0043] This invention, by setting a limiting component, ensures that the volute tongue 3 will not deviate during rotation and can accurately stop at two preset working positions, thus ensuring the repeatability and sealing of the air duct switching.

[0044] Specifically, the limiting components include a limiting groove provided on the inner wall of the volute 300 for limiting the sliding connection of the volute tongue 3, an axial limiting wheel 5 and a radial limiting wheel 6 that abut against the inner wall of the volute 300.

[0045] As a further improvement of this utility model, the limiting groove is formed by folding the volute 300 by folding the edge 301; the extension shape of the limiting groove is the same as the rotation path of the volute tongue 3.

[0046] This invention not only locks the position of the worm tongue 3 through a limiting groove, an axial limiting wheel 5, and a radial limiting wheel 6, ensuring smooth and stable movement, but also effectively suppresses vibration and sway, improving structural durability. The limiting groove aligns with the rotation path of the worm tongue 3, ensuring precise alignment of the motion trajectory and preventing jamming or interference. The axial limiting wheel 5 constrains the axial movement of the worm tongue 3, while the radial limiting wheel 6 controls its radial runout; this dual limiting mechanism ensures stable operation of the worm tongue 3 during high-frequency reciprocating switching. The limiting wheels also effectively reduce frictional resistance during the rotation of the worm tongue 3, extending the service life of transmission components. Simultaneously, in conjunction with the gear set 11, they achieve position control, ensuring error-free air duct switching. The limiting groove is integrally formed from the worm housing 300mm folded edge, resulting in a robust structure that saves space and facilitates mass production and assembly.

[0047] In this embodiment, there are two axial limiting wheels 5, which are installed at both ends of the circumference of the volute tongue 3.

[0048] This invention effectively balances the axial force on the volute tongue 3 during rotation by setting axial limiting wheels 5 at both ends, preventing unilateral load distribution or axial movement. The two limiting wheels are symmetrically arranged on the circumference of the volute tongue 3 and fit tightly with the inner wall of the volute housing 300, further improving rotational stability and structural rigidity.

[0049] In this embodiment, there are several radial limiting wheels 6, which are spaced apart along the circumference of the volute tongue 3.

[0050] To ensure a good seal, a sealing strip 9 is also provided on the inner wall of the volute 300.

[0051] To ensure a good seal, a sealing strip 9 is provided on the side away from the motor 10 to seal the channel between the volute tongue 3 and the volute housing 300. The sealing strip 9 is made of elastic material and fits the edge contour of the volute tongue 3. It achieves a seamless seal through interference fit, effectively preventing air leakage.

[0052] Example 2 like Figures 1-9 As shown, the present invention provides a duct air conditioner, which includes an air duct structure.

[0053] Specifically, the air duct structure includes a volute 300, a centrifugal fan blade 100, a first air outlet 1, a second air outlet 2, a volute tongue 3, and a switching assembly; wherein: Centrifugal fan blades 100 are disposed in the middle of the inner cavity of volute 300 to form a first air duct and a second air duct on both sides thereon, respectively. The first air outlet 1 is connected to the first air duct; specifically, the first air outlet 1 is a horizontal air outlet. The second air outlet 2 is connected to the second air duct; the second air outlet 2 is a vertical air outlet. The volute tongue 3 is installed in the inner cavity of the volute housing 300 via a switching component to open either of the two air ducts.

[0054] It should be noted that the volute tongue 3 can move to both sides of the centrifugal fan blade 100 under the drive of the switching component, so as to open the first air duct or the second air duct respectively, thereby realizing the horizontal air outlet 1 or the vertical air outlet 2.

[0055] The air duct structure of this utility model drives the volute tongue 3 to rotate through the switching component, so that the volute tongue 3 switches the conduction state between the first air duct and the second air duct, thereby realizing the alternating air supply in the horizontal and vertical directions. It can realize the rapid switching of the air outlets of the two air outlets according to different mode requirements, thereby achieving the air supply effect of shower-style cooling and carpet-style heating, and improving user comfort.

[0056] like Figures 2-4 As shown, considering the shape of the volute 300, in this embodiment, the volute tongue 3 is a semi-cylindrical structure.

[0057] The volute tongue 3 of this invention has a semi-cylindrical structure, and its arc-shaped surface maintains a constant gap with the outer edge of the centrifugal fan blade 100, which effectively guides the airflow direction and reduces eddy current loss.

[0058] As an optional embodiment of this utility model, such as Figures 2-6 As shown, the switching assembly includes a motor 10 and a transmission structure; wherein: The motor 10 is connected to the worm tongue 3 through a transmission structure, and can drive the worm tongue 3 to rotate in the inner cavity of the worm housing 300.

[0059] This invention utilizes the coordinated operation of the motor 10 and the transmission structure to achieve precise rotation control of the volute tongue 3, thereby automatically switching the air duct according to the cooling or heating mode, improving energy efficiency and air delivery accuracy. The transmission structure is a gear set 11 or a worm gear mechanism, ensuring smooth operation and low noise. In cooling mode, the volute tongue 3 rotates to the first air duct opening position, achieving horizontal air delivery from the top, with cool air diffusing along the ceiling to avoid direct airflow onto people; in heating mode, the volute tongue 3 switches to the second air duct, delivering air vertically downwards, with hot air reaching the floor directly, creating carpet-like heating. The entire switching process requires no manual intervention, is compatible with intelligent control systems, and is suitable for the diverse needs of modern homes and commercial spaces.

[0060] Specifically, the transmission structure includes a gear set 11 and a rack 4; wherein: Rack 4 is fixed to one axial end of volute tongue 3; The gear set 11 is connected to the motor 10 and the rack 4 respectively.

[0061] In this example, the gear set 11 includes three gears, one of which is connected to the output shaft of the motor 10, the second and third gears are coaxially arranged, the second gear meshes with the first gear, and the third gear meshes with the rack 4.

[0062] For easy fixing, the motor 10 is fixed inside the volute 300 by the mounting limit plate 12, and the shafts of the second and third gears in the gear set 11 are also fixed on the mounting limit plate 12.

[0063] In this invention, the gear set 11 converts the rotational motion of the motor 10 into the rotational motion of the rack 4 around its axis, thereby driving the volute tongue 3 to rotate around its axis, achieving precise control of duct switching. The rack 4 and gear set 11 mesh stably, resulting in high transmission efficiency and ensuring that the volute tongue 3 accurately stops at two limit positions within a semi-circular trajectory, guaranteeing complete connection or closure of the first and second ducts. This structure facilitates the integration of position sensors, enabling feedback closed-loop control of the switching state and further enhancing the system's intelligence. The overall structure is compact, suitable for space-constrained indoor unit designs, balancing performance and reliability.

[0064] To ensure the stability of the worm tongue 3 during movement, the switching assembly also includes a limiting member installed at the other end of the worm tongue 3 along its axis.

[0065] This invention, by setting a limiting component, ensures that the volute tongue 3 will not deviate during rotation and can accurately stop at two preset working positions, thus ensuring the repeatability and sealing of the air duct switching.

[0066] Specifically, the limiting components include a limiting groove provided on the inner wall of the volute 300 for limiting the sliding connection of the volute tongue 3, an axial limiting wheel 5 and a radial limiting wheel 6 that abut against the inner wall of the volute 300.

[0067] like Figure 10 As shown, as a further improvement of this utility model, the limiting groove is formed by folding the edge of the volute 300; the extended shape of the limiting groove is the same as the rotation path of the volute tongue 3. In order to facilitate the sliding of the volute tongue 3, a pulley 7 is also provided on the side of the volute tongue 3 to facilitate the movement of the volute tongue 3 in the limiting groove.

[0068] In use, the axial and radial limiting wheels are arranged at the edge of the volute tongue. The axial limiting wheels at both ends of the volute tongue can engage with the inner wall of the volute casing (e.g., Figure 11 The view shown (left and right directions) fits and limits the movement, the radial limiting wheel on the radial direction of the volute tongue and the volute shell folded edge structure and the inner wall of the volute shell ( Figure 11 The view shown is limited in the vertical direction, at which point the worm tongue can only rotate.

[0069] This invention not only locks the position of the worm tongue 3 through a limiting groove, an axial limiting wheel 5, and a radial limiting wheel 6, ensuring smooth and stable movement, but also effectively suppresses vibration and sway, improving structural durability. The limiting groove aligns with the rotation path of the worm tongue 3, ensuring precise alignment of the motion trajectory and preventing jamming or interference. The axial limiting wheel 5 constrains the axial movement of the worm tongue 3, while the radial limiting wheel 6 controls its radial runout; this dual limiting mechanism ensures stable operation of the worm tongue 3 during high-frequency reciprocating switching. The limiting wheels also effectively reduce frictional resistance during the rotation of the worm tongue 3, extending the service life of transmission components. Simultaneously, in conjunction with the gear set 11, they achieve position control, ensuring error-free air duct switching. The limiting groove is integrally formed from the worm housing 300mm folded edge, resulting in a robust structure that saves space and facilitates mass production and assembly.

[0070] In this embodiment, there are two axial limiting wheels 5, which are installed at both ends of the circumference of the worm tongue 3.

[0071] This invention effectively balances the axial force on the volute tongue 3 during rotation by setting axial limiting wheels 5 at both ends, preventing unilateral load distribution or axial movement. The two limiting wheels are symmetrically arranged on the circumference of the volute tongue 3 and fit tightly with the inner wall of the volute housing 300, further improving rotational stability and structural rigidity.

[0072] In this embodiment, there are several radial limiting wheels 6, which are spaced apart along the circumference of the volute tongue 3.

[0073] To ensure a good seal, a sealing strip 9 is also provided on the inner wall of the volute 300.

[0074] To ensure a good seal, a sealing strip 9 is provided on the side away from the motor 10 to seal the channel between the volute tongue 3 and the volute housing 300. The sealing strip 9 is made of elastic material and fits the edge contour of the volute tongue 3. It achieves a seamless seal through interference fit, effectively preventing air leakage.

[0075] Furthermore, the ducted air conditioner also includes an evaporator 200 installed inside the casing.

[0076] This utility model redesigns the original air duct of the ducted air conditioner, incorporating a rotatable volute 3. When cooling is needed, it rotates to the horizontal air outlet (first air outlet 1) to achieve a shower-like cooling effect; when heating is needed, it rotates to the vertical air outlet (second air outlet 2) to achieve a carpet-like heating effect. Figure 1 As shown.

[0077] The volute tongue 3 is a hollow semi-cylindrical structure. One side of its axial end face is provided with an annular rack 4, and the other end face is provided with limiting wheels, including an axial limiting wheel 5 and a radial limiting wheel 6. (See...) Figure 2 .

[0078] Of course, limit wheels can also be set at both ends of the worm tongue 3 axis as needed.

[0079] The volute 300 component is equipped with an integrally formed air duct, and the centrifugal fan blade 100 is disposed within the air duct, thereby forming a first air duct and a second air duct at both ends of the centrifugal fan blade 100, respectively. The motor 10 and the gear set 11 are mounted on the mounting limit plate 12. The mounting limit plate 12 also restricts the gear rack 4 from fully meshing, ensuring that when the motor 10 drives the gear set 11 to rotate, the volute tongue 3 rotates within the entire volute 300 component. A sealing strip 9 is also provided within the volute 300 component. The sealing strip 9 ensures the airtightness of the entire air duct when the volute tongue 3 rotates to the horizontal or vertical air outlet. Figure 5 and Figure 6 As shown.

[0080] in, Figure 5 and Figure 7 The diagram shows the volute tongue 3 rotating to the horizontal air outlet position, at which point air is supplied from the horizontal air outlet. Figure 7 This is a schematic diagram of airflow direction. At this time, the air is drawn in from the middle of the volute 300 component, and after passing through the centrifugal fan 100, it is thrown out from the horizontal air outlet. In the cooling mode, it ensures that the cold air is delivered in the horizontal direction at all times, achieving the effect of shower-like cooling.

[0081] Figure 6 and Figure 8 The diagram shows the volute tongue 3 rotating to the vertical air outlet position, at which point air is supplied from the vertical air outlet. Figure 8 This is a schematic diagram of airflow direction. At this time, the air is drawn in from the middle of the volute 300 component, passes through the centrifugal fan 100, and is thrown out from the vertical air outlet. In heating mode, it ensures that the hot air is delivered vertically at all times, achieving a carpet-like heating effect.

[0082] The control method of the duct air conditioner of this utility model is as follows: Figure 9As shown, when starting a ducted air conditioner, the first step is to check if the currently open air vent is a horizontal outlet. Once confirmed to be horizontal, the operating mode is determined. If it is in cooling mode, the fan can be turned on directly, and the user can enjoy a shower-like cooling experience. If it is in heating mode, to experience a carpet-like heating effect, the motor 10 needs to be started to rotate the volute 3 to change the airflow direction to vertical. The reverse is also true.

[0083] In this duct air conditioner, during the rotation of the volute tongue 3, the axial limiting wheel 5 and the radial limiting wheel 6 work together to ensure stable positioning along the rotation path and prevent displacement due to airflow impact. The limiting groove cooperates with the sliding connection structure to guide the volute tongue 3 along a preset trajectory, improving switching accuracy. The sealing strip 9 forms a seal between the volute tongue 3 and the inner wall of the volute housing 300 to prevent air leakage and improve airflow utilization.

[0084] First, it should be noted that "inward" refers to the direction towards the center of the storage space, while "outward" refers to the direction away from the center of the storage space.

[0085] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing this utility model and simplifying the description, and are not intended to 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 of this utility model.

[0086] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0087] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0088] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0090] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A duct structure, characterized in that, Includes a volute, centrifugal fan blades, a first air outlet, a second air outlet, a volute tongue, and a switching assembly; wherein: The centrifugal fan blades are disposed in the middle of the inner cavity of the volute to form a first air duct and a second air duct on both sides of the volute, respectively. The first air outlet is connected to the first air duct; The second air outlet is connected to the second air duct; The volute tongue is installed in the inner cavity of the volute via the switching assembly to open either of the two air ducts.

2. The air duct structure according to claim 1, characterized in that, The volute tongue has a semi-cylindrical structure.

3. The air duct structure according to claim 2, characterized in that, The switching component includes a motor and a transmission structure; wherein: The motor is connected to the volute tongue via the transmission structure, and can drive the volute tongue to rotate in the inner cavity of the volute.

4. The air duct structure according to claim 3, characterized in that, The transmission structure includes a gear set and a rack; wherein: The rack is fixed to one end of the axial direction of the volute tongue; The gear set is connected to the motor and the rack, respectively.

5. The air duct structure according to claim 3, characterized in that, The switching assembly also includes limiting members installed at both ends of the worm tongue axis.

6. The air duct structure according to claim 5, characterized in that, The limiting component includes a limiting groove disposed on the inner wall of the volute for limiting the sliding connection of the volute tongue, an axial limiting wheel and a radial limiting wheel that abut against the inner wall of the volute.

7. The air duct structure according to claim 6, characterized in that, The number of axial limiting wheels is two, which are installed at both ends of the circumference of the volute tongue.

8. The air duct structure according to claim 6, characterized in that, The radial limiting wheels are of several types, and are spaced apart along the circumference of the volute tongue.

9. The air duct structure according to claim 1, characterized in that, It also includes a sealing strip disposed on the inner wall of the volute.

10. A ducted air conditioner, characterized in that, Includes the air duct structure as described in any one of claims 1-9.

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