Ducted fan

Abstract

The application relates to the air conditioner technical field, and discloses a ducted air conditioner. The ducted air conditioner provided by the application comprises a shell, a fan wheel assembly, a volute assembly and a power assembly. The fan wheel assembly comprises a rotating shaft and a fan wheel, the rotating shaft can drive the fan wheel to rotate around a first rotation center; the volute assembly comprises a fixedly connected volute and a sealing partition plate, and the volute cover is arranged on the fan wheel; the power assembly comprises a driving gear and a driven gear which are engaged, the driving gear is rotationally connected to a connecting plate in the shell, and the driven gear is fixedly connected to the sealing partition plate through the connecting plate. The driven gear rotates to drive the volute to rotate around a second rotation center; the driving gear comprises an elliptical gear tooth, so that the driven gear generates displacement in the interference direction away from the volute and the shell during rotation, and the distance between the second rotation center and the first rotation center is adjusted. The application adjusts the position of the rotation center of the volute during rotation through the power assembly, and the interference problem of the volute during rotation in the ducted air conditioner is avoided.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, for example to a ducted air conditioner. Background Technology

[0002] With the improvement of living standards, air conditioners have become an indispensable household appliance for improving the quality of life and are widely used. Air conditioner indoor units installed on the upper wall or ceiling of a room often have side-discharge airflow. When heating, the density of hot air is low, and the side-discharge airflow causes the hot air to rise, failing to reach users in the lower part of the room. This results in uneven temperature distribution within the room, causing the upper part to be hot and the lower part cold, which is particularly unpleasant for users who are prone to cold hands and feet.

[0003] In related technologies, to enable the switching of airflow direction in an air conditioning indoor unit, an air conditioning indoor unit and an air conditioner are disclosed. The air conditioning indoor unit includes a housing and a rotating air duct assembly. The housing has a first air outlet and a second air outlet; the rotating air duct assembly is disposed within the housing and is rotatable relative to the housing to allow the air conditioning indoor unit to switch between a first air outlet mode and a second air outlet mode. When the air conditioning indoor unit is in the first air outlet mode, air from outside the housing enters through the first air outlet and exits through the second air outlet after flowing through the rotating air duct assembly. When the air conditioning indoor unit is in the second air outlet mode, air from outside the housing enters through the second air outlet and exits through the first air outlet after flowing through the rotating air duct assembly. The housing includes a fixed housing portion and a movable housing portion. The movable housing portion can move away from the fixed housing portion, and the movement stroke allows the rotating air duct assembly to rotate freely within the housing. The rotating air duct assembly includes a centrifugal impeller assembly or an axial flow impeller assembly.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0005] Existing reversible airflow indoor unit rotating duct assemblies require additional rotation clearance. When installed on small-sized indoor units, interference can easily occur between the volute casing and the inner wall of the indoor unit housing during centrifugal fan assembly rotation, leading to sluggish operation of the indoor unit. Summary of the Invention

[0006] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0007] This disclosure provides a ducted air conditioner where the driving gear includes elliptical teeth. This allows the driven gear to rotate in a direction away from the interference between the volute and the housing, thereby adjusting the distance between the second rotation center and the first rotation center. Existing ducted air conditioners require a large volute to ensure optimal airflow performance. However, because the volute's profile is non-circular, installing it inside the ducted air conditioner housing can easily cause interference during rotation. This application, by adjusting the relative position of the volute, can meet the needs of small-sized ducted air conditioners while avoiding motion interference.

[0008] In some embodiments, the duct unit includes a housing, a fan assembly, a volute assembly, and a power assembly. A connecting plate is fixed inside the housing; the fan assembly includes a shaft and a fan, the shaft being fixedly inserted through the fan and rotatably disposed within the housing, its rotation driving the fan to rotate around a first rotation center; the volute assembly includes a sealing partition and a volute, the volute covering the fan and being fixedly connected to the sealing partition; the power assembly includes a meshing drive gear and a driven gear, the drive gear being rotatably connected to the connecting plate, the driven gear passing through the connecting plate and fixedly connected to the sealing partition, the drive gear rotating to drive the driven gear to rotate, thereby driving the sealing partition and the volute to rotate around a second rotation center; wherein the drive gear includes elliptical teeth, so that during the rotation of the driven gear, displacement occurs in a first direction, thereby adjusting the distance between the second rotation center and the first rotation center, the first direction being the direction away from the interference between the volute and the housing.

[0009] In some optional embodiments, the side plates and bottom plates of the housing are respectively provided with perpendicular side air vents and down air vents. The sealing partition can rotate to allow the duct air conditioner to switch between a first air outlet mode and a second air outlet mode. In the first air outlet mode, air enters through the side air vents and exits through the down air vents; in the second air outlet mode, air enters through the down air vents and exits through the side air vents. In either the first or second air outlet mode, the second rotation center coincides with the first rotation center, and the volute is located concentrically with the impeller. During the switching between the first and second air outlet modes, the power component adjusts the distance between the second rotation center and the first rotation center, causing the volute to deviate from the center of the impeller.

[0010] In some alternative embodiments, the first direction refers to a direction perpendicular to the base plate; or a direction perpendicular to the side plate.

[0011] In some alternative embodiments, the power assembly further includes a first drive device, which includes a drive output end and a drive gear disposed at the drive output end; wherein the first drive device drives the drive gear to rotate, thereby driving the driven gear to rotate, so that the driven gear drives the sealing partition to rotate relative to the connecting plate.

[0012] In some alternative embodiments, the driving gear further includes a first gear body and a first connecting post. Elliptical teeth are located on the outer periphery of the first gear body and mesh with the driven gear; the first connecting post is fixedly connected to the drive output end and is located at the center of the elliptical teeth.

[0013] In some alternative embodiments, the duct unit further includes a buffer mechanism. The buffer mechanism includes a buffer body and an elastic element. The buffer body is sleeved on the driven gear and located on the side away from the driving gear; the elastic element is located on the buffer body and is used to provide a damping force to dampen the displacement during the displacement of the sealing partition, thereby limiting the meshing of the driving gear and the driven gear; wherein the line connecting the center of the driving gear and the center of the driven gear lies on the extension line of the elastic direction of the elastic element.

[0014] In some alternative embodiments, the duct unit also includes a bearing movably mounted on the connecting plate. The bearing includes an inner bearing ring and an outer bearing ring. The inner bearing ring is fixedly sleeved on the first connecting post, and the outer bearing ring is fixedly connected to the buffer body. The driven gear can rotate to drive the bearing to move in a first direction.

[0015] In some alternative embodiments, the buffer body includes an arc-shaped frame and a protruding post.

[0016] The arc-shaped frame includes a concentric inner arc surface and an outer arc surface, with the inner arc surface fixedly attached to the outer ring of the bearing; the protrusion is fixed on the outer arc surface; the buffer body also includes a spring, with one end of the spring sleeved on the protrusion.

[0017] In some alternative embodiments, the connecting plate has a limiting hole, the first connecting post passes through the limiting hole, and the first gear body and the sealing partition are located on both sides of the connecting plate; wherein, the other end of the spring abuts against the inner wall of the limiting hole, the limiting hole is used to provide a moving track for the first connecting post, so that the driven gear drives the volute to deviate from the center of the wind turbine during rotation, and can return the volute to the concentric position with the wind turbine under the action of the elastic force of the spring.

[0018] In some alternative embodiments, the maximum eccentricity when the volute rotates is the difference between the major and minor semi-axis of the elliptical tooth tip ellipse; the length of the limiting hole in the first direction is greater than or equal to the maximum eccentricity when the volute rotates.

[0019] The duct air handling unit provided in this disclosure can achieve the following technical effects:

[0020] The ducted air conditioner includes a housing, a impeller assembly, a volute assembly, and a power assembly. A connecting plate is fixed inside the housing. The impeller assembly includes a shaft and an impeller; the shaft is fixedly mounted through the impeller and rotatably disposed within the housing, driving the impeller to rotate around a first rotation center. The volute assembly includes a sealing partition and a volute; the volute covers the impeller and is fixedly connected to the sealing partition. The power assembly includes a meshing drive gear and a driven gear. The drive gear is rotatably connected to the connecting plate, and the driven gear passes through the connecting plate and is fixedly connected to the sealing partition. Rotation of the drive gear drives the driven gear, which in turn drives the sealing partition and the volute to rotate around a second rotation center. The drive gear includes elliptical teeth, causing displacement in a first direction during the driven gear's rotation, thereby adjusting the distance between the second rotation center and the first rotation center. The first direction is the direction away from the interference between the volute and the housing. By adjusting the rotation center position of the volute during rotation using the power assembly, interference between the volute and the inner wall of the housing is avoided when operating in a small-sized ducted air conditioner.

[0021] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0022] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0023] Figure 1 This is an exploded view of a partial structure of the ducted air handling unit provided in this embodiment of the disclosure;

[0024] Figure 2 This is a partial structural schematic diagram of the duct air conditioner provided in an embodiment of this disclosure;

[0025] Figure 3 This is a schematic diagram of the overall structure of the buffer mechanism and bearing provided in the embodiments of this disclosure;

[0026] Figure 4 This is a schematic diagram of the overall structure of the sealing partition and baffle provided in the embodiments of this disclosure;

[0027] Figure 5 This is another partial structural schematic diagram of the duct air conditioner provided in the embodiments of this disclosure;

[0028] Figure 6 This is a partial structural schematic diagram of another ducted air handling unit provided in an embodiment of this disclosure;

[0029] Figure 7 This is a partial structural schematic diagram of another duct unit provided in an embodiment of this disclosure;

[0030] Figure 8 This is a schematic diagram of the overall structure of the driving gear and driven gear provided in the embodiments of this disclosure.

[0031] Figure label:

[0032] 1: Housing; 101: Side air vent; 102: Downwind vent; 2: Sealing partition; 21: Limiting hole; 22: Clearance notch; 3: Volute; 41: First drive device; 42: Driving gear; 421: First gear body; 422: First connecting column; 43: Driven gear; 431: Second gear body; 432: Second connecting column; 5: Rotating shaft; 6: Wind wheel; 7: Baffle; 71: Pivot shaft; 8: Second drive device; 9: Bearing; 10: Fixed seat; 11: Fixed frame; 12: Third drive device; 13: Connecting plate; 131: Clearance guide rail; 14: Buffer mechanism; 141: Buffer body; 142: Elastic element. Detailed Implementation

[0033] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0034] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0035] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0036] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0037] Unless otherwise stated, the term "multiple" means two or more.

[0038] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0039] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0041] Combination Figure 1-8 As shown in the figure, this disclosure provides a duct air conditioner.

[0042] Traditional ducted air conditioners can achieve two air outlet modes by adding a rotating duct assembly: one with air intake at the bottom and air outlet at the side, and the other with air intake at the side and air outlet at the bottom. The housing includes a fixed housing and a movable housing. The movable housing can move away from the fixed housing, and its movement allows the rotating duct assembly to rotate freely within the housing. The rotating duct assembly includes a centrifugal impeller assembly. While existing ducted air conditioners can switch air outlets, they occupy a large space, making them unsuitable for the limited ceiling space in low-rise buildings. Installing them on smaller ducted units requires making the volute as large as possible to ensure air delivery performance. However, because the volute's outline is not circular, interference occurs at the bottom during rotation, leading to jamming or even malfunction of the ducted unit.

[0043] The duct air handling unit provided in this embodiment includes a housing 1, a fan assembly, a volute assembly, and a power assembly. A connecting plate 13 is fixed inside the housing 1; the impeller assembly includes a rotating shaft 5 and an impeller 6, the rotating shaft 5 is fixedly inserted through the impeller 6, and the rotating shaft 5 is rotatably disposed inside the housing 1. The rotation of the rotating shaft 5 can drive the impeller 6 to rotate around a first rotation center; the volute assembly includes a sealing partition 2 and a volute 3, the volute 3 covers the impeller 6, and the volute 3 is fixedly connected to the sealing partition 2; the power assembly includes a meshing drive gear 42 and a driven gear 43, the drive gear 42 is rotatably connected to the connecting plate 13, and the driven gear 43 passes through the connecting plate 13 and is fixedly connected to the sealing partition 2. The rotation of the drive gear 42 drives the driven gear 43 to rotate, thereby driving the sealing partition 2 and the volute 3 to rotate around a second rotation center; wherein, the drive gear 42 includes elliptical teeth, so that the driven gear 43 generates displacement in a first direction during rotation, thereby adjusting the distance between the second rotation center and the first rotation center, the first direction being the direction away from the interference between the volute 3 and the housing 1.

[0044] Specifically, the rotating shaft 5 is rotatably mounted inside the housing 1. Rotation of the rotating shaft 5 drives the impeller 6 to rotate around a first rotation center. Since the position of the rotating shaft 5 is limited, the position of the first rotation center is fixed. The volute 3 houses the impeller 6 and is fixed to the sealing partition 2. The driven gear 43 passes through the connecting plate 13 and is fixedly connected to the sealing partition 2. The connecting plate 13 is fixed inside the housing 1, allowing the driven gear 43 to drive the sealing partition 2 and the volute 3 to rotate relative to the connecting plate 13. The driving gear 42 is rotatably mounted on the connecting plate 13 and meshes with the driven gear 43 for transmission. Thus, the rotation of the driving gear 42 enables the driven gear 43 to drive the volute 3 to rotate around a second rotation center.

[0045] Understandably, as rotation begins, the outer contour of the top of the volute 3 gradually decreases, while the top space increases. To ensure the fan size and air delivery performance, the teeth on the drive gear 42 are set to elliptical. This way, when the driven gear 43 rotates, it will displace relative to the drive gear 42 in a direction opposite to the interference direction between the volute 3 and the housing 1. This allows for timely adjustment of the rotation center position of the volute 3 during rotation, fully utilizing the top space of the volute 3 and avoiding interference between the volute 3 and the inner wall of the housing 1. Furthermore, it allows for a thinner duct unit, meeting the needs of smaller duct units.

[0046] Optionally, the side plate and bottom plate of the housing 1 are respectively provided with perpendicular side air inlets 101 and down air inlets 102. The sealing partition 2 can be rotated to allow the duct unit to switch between a first air outlet mode and a second air outlet mode. In the first air outlet mode, air enters through the side air inlet 101 and exits through the down air inlet 102. In the second air outlet mode, air enters through the down air inlet 102 and exits through the side air inlet 101. In either the first or second air outlet mode, the second rotation center coincides with the first rotation center, and the volute 3 is located concentrically with the impeller 6. During the switching between the first and second air outlet modes, the power component adjusts the distance between the second rotation center and the first rotation center, so that the volute 3 deviates from the center of the impeller 6.

[0047] Specifically, when the ducted air conditioner is operating in heating mode, it is in the first air outlet mode, with air entering through the side vent 101 and exiting through the bottom vent 102. The air outlet direction of the ducted air conditioner is downward. Since hot air is lighter, it tends to float at the top of the room. By discharging the air downwards, the hot air can be delivered to the area where people live, improving the comfort of the user's area. When the ducted air conditioner is operating in cooling mode, it is in the second air outlet mode, with air entering through the bottom vent 102 and exiting through the side vent 101. By discharging the air sideways, the cool air can be directed downwards, making the cooling and air distribution more even. When the ducted air conditioner is discharging air, the volute 3 is stationary. At this time, the power component is not active, and the second rotation center coincides with the first rotation center. During the airflow direction switching process of the ducted air conditioner, the volute 3 rotates to align its air outlet with the side air outlet 101 or the downflow outlet 102. During this rotation, the power unit continuously adjusts the spatial distance between the bottom of the volute 3 and the inner wall of the ducted air conditioner housing 1. This prevents interference between the snail-shell-like structure of the volute 3 and the inner wall, which could lead to jamming or shutdown issues. During the rotation of the volute 3, the first rotation center remains fixed, while the distance between the second rotation center and the first rotation center gradually increases and then decreases. This eliminates the need for additional clearance space for the volute 3's rotation and ensures the air delivery performance and operational stability of the ducted air conditioner.

[0048] Optionally, the first direction refers to the direction perpendicular to the bottom plate of the housing 1; or the direction perpendicular to the side plate of the housing 1. The first airflow direction can be selected specifically according to the installation location of the ducted air conditioner. Understandably, when the ducted air conditioner is installed on the ceiling, due to the limited ceiling space, a higher thickness is required for the ducted air conditioner. For thinner ducted air conditioners, interference may easily occur between the bottom of the volute 3 and the inner wall of the bottom plate of the ducted air conditioner. Therefore, the first direction of the ducted air conditioner is perpendicular to the bottom plate of the housing 1.

[0049] Optionally, the power assembly further includes a first drive device 41. The first drive device 41 is fixed to the connecting plate 13 and includes a drive output end, on which a drive gear 42 is disposed. The first drive device 41 drives the drive gear 42 to rotate, thereby driving the driven gear 43 to rotate, so that the driven gear 43 drives the sealing partition 2 to rotate relative to the connecting plate 13.

[0050] Specifically, connecting plates 13 are fixed to both sides of the inner wall of the duct unit housing 1, and a sealing partition 2 is rotatably disposed between the two connecting plates 13. A driven gear 43 and the sealing partition 2 are located on either side of one of the connecting plates 13, and are fixedly connected. The first driving device 41 drives the driving gear 42 to rotate, which in turn drives the driven gear 43 to rotate, causing the sealing partition 2 to rotate relative to the connecting plate 13.

[0051] Optionally, the driving gear 42 further includes a first gear body 421 and a first connecting post 422. Elliptical teeth are located on the outer periphery of the first gear body 421 and mesh with the driven gear 43; the first connecting post 422 is fixedly connected to the drive output end and is located at the center of the elliptical teeth.

[0052] Specifically, the teeth of the driving gear 42 are elliptical, with the tooth tip ellipse centered on the first connecting post 422. The tooth tip ellipse includes a minor axis and a major axis. The two intersection points of the minor axis and the tooth tip ellipse are points A and C, respectively, and one intersection point of the major axis and the tooth tip ellipse is point B. When the driven gear 43 meshes at point A, the duct unit operates in the first air outlet mode; when the driven gear 43 meshes at point C, the duct unit operates in the second air outlet mode. By controlling the rotation angle of the driving gear 42, the switching between different air outlet modes can be controlled. Compared to traditional duct units with reversible air supply, this application eliminates the need for additional components, such as microswitches, to switch between different air outlet modes, saving on component costs and internal space of the duct unit.

[0053] During the switching between the first and second air outlet modes, the driving gear 42 drives the driven gear 43 to rotate. The elliptical arc of the tooth tip from point A through point B to point C is the first circular arc. As the driving gear 42 rotates, the driven gear 43 meshes with it along the path of the first circular arc, causing the rotation center of the volute 3 to gradually deviate from the rotation center of the impeller 6 along the first circular arc, and then gradually return to its original position. This avoids interference between the bottom of the volute 3 and the bottom wall of the housing 1 during the rotation of the volute 3.

[0054] Optionally, the driven gear 43 includes a second gear body 431 and a second connecting post 432. The outer periphery of the second gear body 431 is a circular tooth, and the second connecting post 432 is located at the center of the circular tooth. The second connecting post 432 passes through the connecting plate 13 and is fixedly connected to the sealing partition 2, thereby realizing the operation mode of the sealing partition 2 relative to the connecting plate 13.

[0055] Optionally, the duct unit also includes a bearing 9, which is movably mounted on the connecting plate 13. The bearing 9 includes an inner ring and an outer ring. The inner ring is fixedly sleeved on the second connecting post 432, and the outer ring is fixedly connected to the buffer body 141. Rotation of the driven gear 43 can drive the bearing 9 to rotate in the first direction. This avoids friction when the sealing partition 2 rotates relative to the connecting plate 13, preventing unnecessary damage to components; and also avoids deformation of the buffer body 141 in the rotation direction of the volute 3 during its rotation.

[0056] Optionally, the duct unit also includes a buffer mechanism 14. The buffer mechanism 14 includes a buffer body 141 and an elastic element 142 located on the buffer body 141. The buffer body 141 is sleeved on the driven gear 43, and the buffer body 141 is located on the side away from the driving gear 42. The elastic element 142 provides a damping force to prevent displacement during the displacement of the sealing partition 2, thereby limiting the meshing of the driving gear 42 and the driven gear 43. The line connecting the center of the driving gear 42 and the center of the driven gear 43 lies on the extension line of the elastic direction of the elastic element 142. This avoids the problem of the driven gear 43 deviating from the driving gear 42, ensuring that the two are always in a meshing transmission relationship. The elastic direction of the elastic element 142 is on the extension line of the centers of the driven gear 43 and the driving gear 42, thus enabling the elastic element 142 to adjust the spacing more stably.

[0057] Optionally, the buffer body 141 includes an arc-shaped frame and protruding posts. The arc-shaped frame includes a concentric inner arc surface and an outer arc surface, with the inner arc surface fixedly attached to the outer ring of the bearing 9; the protruding post is fixed to the outer arc surface; the buffer body 141 also includes a spring, one end of which is sleeved on the protruding post. The arc-shaped frame is sleeved on the outer bearing 9 of the second connecting post 432 of the driven gear 43, and is located on the side away from the driving gear 42. There are multiple protruding posts, and springs are sleeved on multiple protruding posts. The length of the spring in its natural state is much greater than the length of the protruding post. One end of the spring is on the protruding post and presses against the outer arc surface, while the other end of the spring abuts against the limiting hole 21 opened in the connecting plate 13, thereby adjusting the vertical displacement of the sealing partition 2, and thus adjusting the rotation center position of the volute 3, avoiding operational interference during the rotation of the volute 3, and improving the operational stability and air outlet performance of the duct fan.

[0058] Optionally, the connecting plate 13 has a limiting hole 21, through which the first connecting column 422 passes. The second gear body 431 and the sealing partition 2 are located on both sides of the connecting plate 13. The other end of the spring abuts against the inner wall of the limiting hole 21. The limiting hole 21 provides a running track for the second connecting column 432, allowing the driven gear 43 to rotate and drive the volute 3 away from the center of the impeller 6. Under the elastic force of the spring, the volute 3 can return to a position concentric with the impeller 6. Thus, when the ducted air conditioner is discharging air, the second rotation center coincides with the first rotation center, causing the rotation axis 5 of the volute 3 and the impeller 6 to coincide, improving the air delivery stability of the ducted air conditioner. During switching, the volute 3 can rotate and move upwards simultaneously, saving space and avoiding interference between the bottom of the volute 3 and the inner wall of the housing 1.

[0059] Optionally, the maximum eccentricity of the volute 3 during rotation is the difference between the major and minor semi-axis of the elliptical tooth tip ellipse; the length of the limiting hole 21 in the first direction is greater than or equal to the maximum eccentricity of the volute 3 during rotation. This provides clearance space for the movement of the bearing 9.

[0060] Optionally, the following dimensional relationships exist between some components of the ducted air conditioning unit: , h represents the maximum eccentricity of the volute 3 during rotation, and D represents the diameter of the impeller 6. The formula for the maximum eccentricity of the volute 3 during rotation is: The length of the major semi-axis of the tooth tip ellipse is sd0, and the length of the minor semi-axis of the tooth tip ellipse is sd1. In this way, it can ensure that the driving gear 42 and the driven gear 43 are in a meshing transmission state, and can better control the maximum eccentricity of the volute 3 when rotating according to the size of the impeller 6 and the gear teeth, so as to make reasonable use of the internal space of the duct machine.

[0061] Optionally, the spacing between the limiting holes 21 located on the surface of the connecting plate 13 and perpendicular to the spring elastic direction is greater than or equal to the outer diameter of the outer ring of the bearing 9; or, the spacing between the limiting holes 21 located on the surface of the connecting plate 13 and perpendicular to the spring elastic direction is greater than or equal to the spacing between the two ends of the arc-shaped frame. This allows the second rotation center to shift only vertically relative to the first rotation center, improving the stability of the duct machine.

[0062] Optionally, the sealing partition 2 is provided with multiple clearance notches 22, and the air outlets of multiple volutes 3 are snapped onto the multiple clearance notches 22. The sealing partition 2 includes a first partition and a second partition. The first partition has clearance notches 22, and the air outlets of the volutes 3 are fixed to the clearance notches 22; the second partition is perpendicularly fixed to the first partition; there are two second partitions, located on both sides of the air inlet of the volute 3, and the first partition is located between the two second partitions. In this way, the connection between the first partition and the second partition is more reliable and the positioning is more accurate. The sealing partition 2 not only plays a certain role in bearing and supporting the multiple volutes 3 and preventing the housing 1 from deforming, but also drives the volutes 3 to rotate, so that the duct air conditioner can switch the air outlet without additional air duct switching elements.

[0063] Optionally, multiple centrifugal fans can be used, with multiple impellers 6 of the centrifugal fans fixedly mounted on a rotating shaft 5. Axial rotation of the shaft 5 can drive the multiple impellers 6 to rotate. The rotating shaft 5 and the sealing partition 2 are independent of each other, allowing the volute 3 and the impellers 6 to operate independently, thus achieving multiple air outlet modes. The number of centrifugal fans is not specifically limited here; it can be set arbitrarily according to actual usage.

[0064] Optionally, the volute 3 includes an upper volute portion and a lower volute portion. The upper volute portion includes a volute outlet and an upper shell surface, and is integrally formed. Multiple upper volute portions are fixedly snapped onto multiple clearance notches 22 of the sealing partition 2, and the lower volute portions are connected to the upper volute portions one by one. The lower volute portions and the upper volute portions can be connected by snap-fit ​​or other detachable connection methods, which are not limited here. To enhance the strength of the upper volute portion, an L-shaped fixing plate can be added, with its two sides fixed to the air outlet position of the upper volute portion and the sealing partition 2, respectively.

[0065] Optionally, the duct unit also includes a baffle 7 and a second drive device 8. The baffle 7 includes a pivot shaft 71, and the baffle 7 is pivotally connected to the sealing partition 2 via the pivot shaft 71. The second drive device 8 is fixed on the sealing partition 2 and is used to drive the pivot shaft 71 to rotate axially, thereby rotating the baffle 7. The baffle 7 is used to isolate the inlet and outlet airflow of the volute 3. Specifically, the sealing partition 2 separates the air outlet of the volute 3 from the air inlets on both sides of the volute 3, and the lower part of the sealing partition 2 can be pivotally connected to the baffle 7 via the pivot shaft 71. The sealing baffle 2 can drive the volute 3 to rotate, so that the air outlet direction of the volute 3 is switched from the downflow outlet 102 to the side outlet 101. Then, by adjusting the rotation angle of the baffle 7, the air duct forms a complete air duct curve, thereby separating the air inlet air duct and the air outlet air duct. This avoids the problem of turbulence and flow caused by mutual interference due to gaps between the air inlet air duct and the air outlet air duct. It is beneficial to reduce the noise in the duct air conditioner and improve the air supply performance of the duct air conditioner.

[0066] Optionally, the baffle 7 is an arc-shaped plate, and the arc angle of the baffle 7 matches the curvature of the air duct. The rotatable baffle 7 enables the duct air conditioner to form a complete air duct curve in both the first and second air outlet modes, which not only avoids the mutual interference between the air inlet and outlet airflow of the volute 3, but also optimizes the air supply duct and improves the air supply performance.

[0067] Optionally, the connecting plate 13 is provided with a clearance guide rail 131, which is an arc-shaped groove. The sealing partition 2 drives the second drive device 8 to rotate, and the clearance guide rail 131 provides a track for the rotation of the second drive device 8. At the same time, the clearance guide rail 131 can limit the movement of the second drive device 8 during the switching between the first and second air outlet modes. By setting the arc-shaped groove, a larger air duct space can be obtained within the 200mm thickness of the duct unit.

[0068] Optionally, the ducted air conditioner also includes a control unit configured to, during the switching from the second air outlet mode to the first air outlet mode, first control the baffle 7 to rotate relative to the sealing partition 2 by a first preset angle, then control the sealing partition 2 to drive the baffle 7 to rotate as a whole by a second preset angle, and then control the baffle 7 to rotate relative to the sealing partition 2 by a third preset angle; during the switching from the first air outlet mode to the second air outlet mode, first control the baffle 7 to rotate relative to the sealing partition 2 by a third preset angle, then control the sealing partition 2 to drive the baffle 7 to rotate as a whole by a second preset angle, and then control the baffle 7 to rotate relative to the sealing partition 2 by a first preset angle; wherein, during the rotation of the baffle 7 driven by the sealing partition 2, the second rotation center first gradually deviates from the first rotation center, and then gradually adjusts back to the position of the first rotation center. This avoids airflow turbulence and allows the height of the volute 3 to be set within the range of 180mm to 190mm without interference within a 200mm overall thickness, thus improving the air outlet performance of the ducted air conditioner.

[0069] Optionally, the duct unit also includes a sealing gasket fixed to the sealing partition 2, which can rotate. The housing 1 also includes a second base plate parallel to the first base plate. When the duct unit exhausts air from the side air outlet 101, the sealing gasket adheres to the second base plate. In the first exhaust mode, the upper surface of the volute 3 is offset from the first base plate, resulting in a gap between the sealing partition 2 and the first base plate. By adding a sealing gasket to fill this gap, the inlet and outlet airflows of the volute 3 are better isolated.

[0070] Optionally, the ducted air conditioner also includes a sealing gasket and a top plate. The top plate is parallel to the bottom plate, and the sealing gasket is fixed to the second bottom plate. When the ducted air conditioner discharges air from the side air outlet 101, the sealing partition 2 abuts against the sealing gasket, thereby sealing the gap between the sealing partition 2 and the top plate, avoiding turbulence between the inlet and outlet airflows, and improving air delivery performance.

[0071] Optionally, the duct unit also includes a fixed base 10 and a third drive device 12. The fixed base 10 is fixed to the housing 1, and the rotating shaft 5 passes through the fixed base 10; the third drive device 12 is used to drive the rotating shaft 5 to rotate axially, thereby causing the impeller 6 to rotate and discharge air.

[0072] Optionally, the duct unit also includes a mounting bracket 11 and a rolling bearing 9. The mounting bracket 11 is fixed to the housing 1; the outer ring of the rolling bearing 9 is fixedly connected to the mounting bracket 11, and the inner ring is fixedly connected to the rotating shaft 5. The mounting bracket 11 is fixed to the housing 1 of the duct unit, and the mounting bracket 11 is fitted with the rolling bearing 9. The outer ring of the rolling bearing 9 is fixedly connected to the mounting bracket 11, and the inner ring of the bearing 9 is fixedly connected to the rotating shaft 5, so that the rotating shaft 5 is rotatably connected to the housing 1. The mounting bracket 11 and the mounting base 10 jointly bear the load of the rotating shaft 5, thereby making the rotating shaft 5 operate more stably.

[0073] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A ducted air conditioner, characterized in that, include: The casing contains a connecting plate fixed inside. A wind turbine assembly includes a rotating shaft and a wind turbine. The rotating shaft is fixedly inserted through the wind turbine and is rotatably disposed within the housing. Rotation of the rotating shaft can drive the wind turbine to rotate around a first rotation center. A volute assembly includes a sealing partition and a volute, the volute being disposed over the impeller and fixedly connected to the sealing partition; and, The power assembly includes a driving gear and a driven gear that mesh with each other. The driving gear is rotatably connected to the connecting plate, and the driven gear passes through the connecting plate and is fixedly connected to the sealing partition. The driving gear rotates so that the driven gear drives the sealing partition and the volute to rotate around the second rotation center. The driving gear includes elliptical teeth, which causes the driven gear to rotate and generate displacement in a first direction, thereby adjusting the distance between the second rotation center and the first rotation center. The first direction is the interference direction away from the volute and the shell.

2. The duct air conditioner according to claim 1, characterized in that, The side plate and bottom plate of the housing are respectively provided with perpendicular side air vents and down air vents. The sealing partition can be rotated to allow the air duct machine to switch between a first air outlet mode and a second air outlet mode. In the first air outlet mode, air enters through the side air vents and exits through the down air vents; in the second air outlet mode, air enters through the down air vents and exits through the side air vents. In either the first or second air outlet mode, the second rotation center coincides with the first rotation center, and the volute is located concentrically with the impeller. During the switching between the first and second air outlet modes, the power component adjusts the distance between the second rotation center and the first rotation center, causing the volute to deviate from the impeller center.

3. The duct air conditioner according to claim 2, characterized in that, The first direction includes: A direction perpendicular to the base plate; or, The direction perpendicular to the side plate.

4. The duct air conditioner according to claim 1, characterized in that, The power assembly also includes: A first driving device is fixed on the connecting plate. The first driving device includes a driving output end, and the driving gear is disposed on the driving output end. The first driving device drives the driving gear to rotate, which in turn drives the driven gear to rotate, so that the driven gear drives the sealing partition to rotate relative to the connecting plate.

5. The duct air conditioner according to claim 4, characterized in that, The driving gear also includes: A first gear body, wherein the elliptical teeth are located on the outer periphery of the first gear body, and the elliptical teeth mesh with the driven gear; and, The first connecting post is fixedly connected to the drive output end, and the first connecting post is located at the center of the elliptical gear tooth.

6. The duct air conditioner according to claim 5, characterized in that, It also includes a buffer mechanism, which comprises: A buffer body is fitted onto the driven gear and located on the side away from the driving gear; and, An elastic element, located on the buffer body, is used to provide a damping force to dampen the displacement during the displacement of the sealing partition, thereby limiting the meshing of the driving gear and the driven gear; The line connecting the center of the driving gear and the center of the driven gear is on the extension line of the elastic direction of the elastic element.

7. The duct air conditioner according to claim 6, characterized in that, Also includes: A bearing is movably mounted on the connecting plate. The bearing includes an inner ring and an outer ring. The inner ring is fixedly sleeved on the first connecting post, and the outer ring is fixedly connected to the buffer body. The driven gear can rotate to drive the bearing to move in the first direction.

8. The duct air conditioner according to claim 7, characterized in that, The buffer body includes: The arc-shaped frame includes a concentric inner arc surface and an outer arc surface, wherein the inner arc surface is fixedly fitted onto the outer ring of the bearing; and, A protruding post is fixed to the outer arc surface; The buffer body also includes a spring, one end of which is sleeved on the protruding post.

9. The duct air conditioner according to claim 8, characterized in that, The connecting plate has a limiting hole, the first connecting post passes through the limiting hole, and the first gear body and the sealing partition are located on both sides of the connecting plate; The other end of the spring abuts against the inner wall of the limiting hole. The limiting hole provides a moving track for the first connecting column so that the driven gear drives the volute to deviate from the center of the wind turbine during rotation, and can return the volute to the concentric position with the wind turbine under the elastic force of the spring.

10. The duct air conditioner according to claim 9, characterized in that, The maximum eccentricity when the volute rotates is the difference between the major and minor semi-axis of the elliptical tooth tip ellipse; the length of the limiting hole in the first direction is greater than or equal to the maximum eccentricity when the volute rotates.

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