Air duct structure and air conditioner

Abstract

The application relates to an air duct structure and an air conditioner, which comprises a shell, a circulating fan, a fresh air fan and a guide air component. The air inlet side of the circulating fan is communicated with a circulating air inlet, the air inlet side of the fresh air fan is communicated with a fresh air inlet, the air outlet side of the circulating fan and the fresh air fan forms an air outlet duct which simultaneously communicates with multiple air outlets. The guide plate of the guide air component can be unfolded to a position between the circulating fan and the fresh air fan and towards the other side of the shell, and the air outlet side of the guide fan forms parallel fresh air flow and circulating air flow in the air outlet duct to avoid air flow collision. The circulating air and the fresh air maintain independent flow paths in the air outlet stage, and interference or mixed disorder of the two air flows in the outlet area is avoided. The structure can not only effectively reduce the air outlet resistance, but also make the air flow direction more concentrated and stable, so that the overall air supply efficiency of the system is improved.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to an air duct structure and an air conditioner. Background Technology

[0002] In current fresh air systems and air circulation equipment, fresh air and recirculated air typically flow out in the same direction along a single channel at the intersection of the air ducts, resulting in concentrated airflow and excessively high velocity. This concentrated airflow easily generates turbulence and eddies at the air outlet, leading to significant exhaust noise, affecting the user experience, and reducing air circulation efficiency. Especially in confined spaces or where installation location is limited, the turbulence is more pronounced, easily causing uneven temperature distribution and excessively strong localized airflow in the air outlet area.

[0003] In existing technologies, duct structures mostly employ right-angle or simple bend designs, primarily aimed at guiding airflow. They lack optimization techniques for airflow organization, often resulting in significant separation and velocity gradients when airflow passes through turning or converging areas, increasing flow resistance. Simultaneously, the energy output of the fan cannot be fully utilized, leading to a reduction in overall system air delivery efficiency. Under long-term operation, excessively high wind speeds may also impact the vent blades or guide structures, shortening component lifespan. In summary, existing fresh air systems exhibit significant shortcomings in duct design, with simplistic airflow organization methods that fail to balance noise control and uniform air delivery requirements. Utility Model Content

[0004] This application provides a duct structure and an air conditioner to solve the technical problem of low air delivery efficiency in the prior art.

[0005] In a first aspect, this application provides an air duct structure, including: The housing has a circulating air inlet and a fresh air inlet on one side; and multiple air outlets on the other side. A circulating fan and a fresh air fan are installed inside the housing. The air inlet side of the circulating fan is connected to the circulating air inlet, and the air inlet side of the fresh air fan is connected to the fresh air inlet. The air outlet sides of the circulating fan and the fresh air fan form an air outlet duct that simultaneously connects to multiple air outlets. An air guide assembly is installed on the air outlet side of the fan. The air guide plate of the air guide assembly can be extended to a position between the circulating fan and the fresh air fan and facing the other side of the housing, guiding the air outlet side of the fan to form parallel fresh air flow and circulating air flow in the air outlet duct to avoid airflow collision.

[0006] Furthermore, two air outlets are arranged side by side, with the air outlet side of the circulating fan facing one air outlet and the air outlet side of the fresh air fan facing the other air outlet.

[0007] In this embodiment, the air guiding assembly includes: The first air guide plate is rotatably set on the air outlet side of the fresh air fan. The first air guide plate can be rotated from the position where the air outlet side of the fresh air fan is closed to the position between the circulating fan and the fresh air fan and facing the other side of the housing. The driving component drives the first air guide plate to rotate.

[0008] In this embodiment, the air guiding assembly includes: The first air guide plate is rotatably set on the air outlet side of the fresh air fan. The first air guide plate can be rotated from the position where the air outlet side of the fresh air fan is closed to the position between the circulating fan and the fresh air fan and facing the other side of the housing. The second air guide plate is rotatably set on the air outlet side of the circulating fan. The second air guide plate can be rotated from the position where the air outlet side of the circulating fan is closed to a position between the circulating fan and the fresh air fan and extending to the other side of the casing. A driving component is used to drive the first air guide plate and the second air guide plate to rotate respectively.

[0009] Furthermore, the outlet ends of the circulating fan and the fresh air fan are arranged side by side at intervals, and the intervals form a storage position for the air guide plate. The air guide plate can be rotated to the storage position formed between the outlet ends of the circulating fan and the fresh air fan.

[0010] Furthermore, the air guide plate is arc-shaped, and when the air guide plate is extended to a position between the circulating fan and the fresh air fan and facing the other side of the housing, its end faces the other side of the housing.

[0011] Furthermore, when both the first and second air guide plates rotate to a position between the circulating fan and the fresh air fan and facing the other side of the casing, they form a V-shape.

[0012] Furthermore, one side of the housing is arranged opposite to the other side; the interior of the housing is divided into a fresh air inlet chamber and a circulating air inlet chamber arranged side by side, and an air outlet chamber arranged between the fan outlet side and the other side of the housing.

[0013] Furthermore, the surface of the air guide plate is provided with a concave-convex structure.

[0014] Secondly, this application provides an air conditioner including the above-mentioned air duct structure, wherein a heat exchanger is provided in the air outlet cavity of the air duct structure.

[0015] The technical solutions provided in this application have the following advantages compared with the prior art: The method provided in this application embodiment uses an air guiding component within its duct structure to ensure that the circulating air and fresh air maintain independent flow paths during the outlet phase, preventing interference or turbulent mixing of the two airflows in the outlet area. This structure not only effectively reduces outlet resistance but also makes the airflow direction more concentrated and stable, thereby improving the overall air supply efficiency of the system. Attached Figure Description

[0016] 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.

[0017] 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.

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the existing technology; Figure 2 This is a schematic diagram of the air mixing mode in the second embodiment of this application; Figure 3 This is a schematic diagram of the silent air mixing mode in the second embodiment of this application; Figure 4 This is a schematic diagram of the circulating air mode in the second embodiment of this application; Figure 5 This is a schematic diagram of the fresh air mode in the second embodiment of this application; Figure 6 This is a schematic diagram of the silent air mixing mode in the first embodiment of this application; Figure 7 This is a schematic diagram of the circulating air mode in the first embodiment of this application; Figure 8 This is a schematic diagram of the air mixing mode in the first embodiment of this application; Explanation of reference numerals in the attached figures: 1. Housing; 111. Circulating air inlet cavity; 112. Fresh air inlet cavity; 113. Air outlet cavity; 12. Air outlet; 13. Recirculating air inlet; 14. Fresh air inlet; 21. Circulating fan; 22. Fresh air fan; 3. Air guide assembly; 31. First air guide plate; 32. Second air guide plate; 4. Heat exchanger. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] In existing technologies, such as Figure 1As shown, the fresh air unit may include a mixing housing 10, a mixing fan 20, and a mixing valve 30. The mixing housing 10 is provided with a first ventilation chamber, a second ventilation chamber, a third ventilation chamber, and a bypass valve 40. The bypass valve 40 is located between the first ventilation chamber and the second ventilation chamber, and the mixing valve 30 is located between the first ventilation chamber and the third ventilation chamber. The mixing valve 30 can rotate between a first position and a second position. The mixing fan 20 can draw air from the third ventilation chamber and the first ventilation chamber. After the indoor air and outdoor air are mixed inside the unit, they are sent to the room through the second ventilation chamber.

[0024] As can be seen from the above description of the prior art and its accompanying drawings, the air duct structure still uses a right angle or simple bend design to guide the air direction. When the airflow passes through the confluence area, i.e. the second ventilation cavity, there is often obvious separation and velocity gradient. Moreover, the air is discharged from the side, which further increases the flow resistance. The structure clearly lacks the means to optimize the airflow organization.

[0025] To address the technical problems of high noise and limited air delivery range caused by concentrated airflow when fresh air and recirculated air meet in the prior art, this application provides a duct structure and an air conditioner. By adding a guide vane in the duct to separate fresh air and recirculated air, the airflow collision is reduced, which can effectively reduce local wind speed, reduce the generation of turbulence and eddies, and thus reduce the noise of the air outlet.

[0026] Figure 2 An air duct structure provided in this application embodiment is mainly used for fresh air air conditioning, including a housing 1, a fan assembly and an air guide assembly 3, wherein; One side of the housing 1 is provided with a circulating air inlet 13 and a fresh air inlet 14 to respectively introduce indoor circulating air and outside fresh air; the other side of the housing 1 is provided with multiple air outlets 12 to achieve multi-point air output. A complete airflow channel from air intake to air outlet is formed inside the housing 1 to guide airflow from different sources to converge and be discharged within the housing 1. A circulating fan 21 and a fresh air fan 22 are installed inside the housing 1, arranged adjacent to each other. The air intake side of the circulating fan 21 is connected to the circulating air inlet 13 to draw in indoor air and circulate it; the air intake side of the fresh air fan 22 is connected to the fresh air inlet 14 to introduce outdoor air for air replacement. The air outlet sides of the circulating fan 21 and the fresh air fan 22 are adjacent and connected in parallel to form a common air outlet duct, which is connected to multiple air outlets 12. The air guide assembly 3 is arranged on the outlet side of the fan, and its air guide plate can be deployed to the position between the circulating fan 21 and the fresh air fan 22 during use, and extends to the other side of the housing 1. Figure 3 , 6As shown, after the air guide plate of the air guide assembly 3 is deployed, it isolates and guides the airflow in space, causing the circulating airflow and the fresh airflow to be discharged in parallel directions, avoiding the collision and turbulence of different airflows in the fan outlet area. Through the guiding effect of the air guide assembly 3, the airflow line inside the duct is more stable, effectively reducing airflow turbulence and noise, and improving the stability and comfort of the air outlet.

[0027] This duct structure, through the rational arrangement of the circulating fan 21, the fresh air fan 22, and the air guide assembly 3, enables the fresh air and circulating air to flow in parallel in space, avoiding energy loss and noise problems caused by airflow collision. The overall structure is compact and the airflow organization is clear, which not only improves the air supply effect and air mixing uniformity, but also improves the quietness and energy efficiency of the air system operation.

[0028] In a specific embodiment of this application, a fresh air inlet 14 and a recirculating air inlet 13 are arranged side-by-side on the air intake side, respectively connecting to the outdoor and indoor spaces for introducing fresh or returning air as needed. Multiple air outlets 12 are arranged in pairs, corresponding to the air outlet directions of the recirculating fan 21 and the fresh air fan 22, respectively. The air outlet side of the recirculating fan 21 faces one of the air outlets, allowing the circulating airflow to be directly discharged along a shorter path, reducing energy loss due to airflow turning; the air outlet side of the fresh air fan 22 faces the other air outlet to deliver fresh air.

[0029] This parallel arrangement of dual air outlets, combined with the air guide plate of the air guide component 3, ensures that the circulating air and fresh air maintain independent flow paths during the air outlet phase, preventing interference or turbulence between the two airflows in the outlet area. This structure not only effectively reduces air outlet resistance but also makes the airflow direction more concentrated and stable, thereby improving the overall air supply efficiency of the system.

[0030] Furthermore, the relative position of the air outlet 12 can be adjusted according to the installation direction of the fan and the structure of the casing 1 to adapt to the air supply needs in different scenarios. By reasonably configuring the air outlet angle and spacing, the airflow diffusion pattern can be further optimized, allowing the circulating air to cover the indoor space, while the fresh air is delivered to the target area through a more straight path, achieving a coordinated and unified air renewal and airflow distribution.

[0031] In this application, the air guide component 3 has multiple embodiments to enable the new air ventilator using the air duct structure to have multiple different mode switching.

[0032] In the first embodiment, as Figures 6 to 8 As shown, the air guide assembly 3 includes: a first air guide plate 31 and a driving component (not shown in the figure).

[0033] The first air guide plate 31 is rotatably mounted on the edge of the air outlet side of the fresh air fan 22, switching between multiple positions around a preset rotating axis: one is a closed position, used to block the air outlet side of the fresh air fan 22; the other is an extended position, where the air guide plate rotates between the two fans and extends towards the other side of the housing 1, spatially separating and guiding the fresh air flow from the circulating air flow, allowing the two airflows to enter the air outlet area in parallel. To ensure stable switching, the edge of the first air guide plate 31 can form a surface contact seal with the peripheral interface of the air outlet side of the fresh air fan 22, reducing leakage and backflow when closed; when extended, the surface of the air guide plate is basically parallel to the air outlet duct, allowing the airflow to pass smoothly. The driving component is connected to the first air guide plate 31 and can output controllable torque to drive the air guide plate to rotate between the closed and extended positions. The driving component can be in the form of a micro motor with a gear structure, or it can be combined with a positioning stop to achieve angle limiting, so as to ensure that a stable positioning angle is reached each time switching, avoiding turbulence and additional resistance caused by partial opening and closing.

[0034] Through the controlled action of the driving components, the first air guide plate 31 can quickly switch according to the operating mode: such as Figure 7 As shown, when the first air guide plate 31 rotates to the position of closing the fresh air fan 22 outlet side, the fresh air fan 22 can stop running, and only the circulating fan 21 operates; as Figure 6 As shown, when the first air guide plate 31 rotates to the position where it unfolds and extends to the other side of the housing 1, the fresh air and the circulating air are discharged in parallel under the constraint of the air guide surface, reducing convection and noise. The air guide assembly 3 is simple and reliable in both structure and control, providing a mechanical basis and flow field guarantee for smooth switching between different air supply conditions.

[0035] In the second embodiment, as Figures 2 to 5 As shown, the air guiding assembly 3 includes a first air guiding plate 31, a second air guiding plate 32, and a driving component. The first air guiding plate 31 is rotatably mounted on the air outlet edge of the fresh air fan 22, and its angle changes around a preset rotating shaft. The second air guiding plate 32 is rotatably mounted on the air outlet edge of the circulating fan 21, forming a spatially opposite air guiding pair with the first air guiding plate 31. The rotating shafts of the two air guiding plates can be fixed to mounting bases inside the housing 1 to ensure structural stability.

[0036] The first air guide plate 31 can switch between multiple positions around a preset rotating axis: such as Figure 4 As shown, the first position is the closed air outlet side of the fresh air fan 22, used to block the fresh air passage when needed; as Figure 3As shown, the second position extends between the two fans and to the other side of the casing 1, forming a planar flow guide interface after unfolding, guiding fresh air into the outlet area along a parallel path. The second guide plate 32 is configured the same as the first guide plate 31: the first position is on the outlet side of the closed-loop fan 21, used to block the circulation air passage when needed; the second position extends between the two fans and to the other side of the casing 1, also forming a planar flow guide interface after unfolding, guiding the circulation air out along a parallel path. The two guide plates are parallel or substantially parallel to each other in the unfolded state, corresponding to the outlet directions of fresh air and circulation air respectively, enabling the two airflows to achieve spatial separation and parallel discharge within the outlet section, reducing convection, weakening eddies, and stabilizing the flow pattern. The driving component is connected to the two guide plates and is used to output controlled torque to drive the guide plates to rotate between closing and unfolding. The driving component (specifically, two driving components are used to drive the two guide plates respectively) can be a micro motor with gear transmission to drive the two guide plates.

[0037] Through the coordinated action of the first air guide plate 31 and the second air guide plate 32, multiple air supply modes can be switched according to different operating conditions: when both plates are deployed simultaneously, fresh air and recirculated air enter the two parallel exhaust vents 12 along parallel channels, and the airflow does not interfere with each other, i.e., mixed air silent mode; when the first air guide plate 31 is closed and the second air guide plate 32 is deployed, only recirculated air is discharged, which is suitable for scenarios where only recirculation ventilation is required, i.e., recirculated air mode; when the second air guide plate 32 is closed and the first air guide plate 31 is deployed, only fresh air is discharged, which is suitable for scenarios where fresh air is centrally introduced, i.e., fresh air mode. The drive components achieve rapid and repeatable angle switching under the overall machine control strategy, allowing the air outlet path and airflow organization to be flexibly adjusted according to demand, while maintaining a stable operating state with low noise and low resistance.

[0038] In the embodiments of this application, such as Figure 2 , 8 As shown, the outlet ends of the circulating fan 21 and the fresh air fan 22 are arranged side by side at intervals, forming a gap between the two outlet ends as the storage position for the air guide plate. When the air guide plate rotates around the shaft, it can rotate from the working angle and fit into this storage position, basically flush with the leading edge of the outlet end, avoiding protrusion into the main channel and generating additional resistance. A small installation gap is reserved at the storage position to ensure smooth rotation and thermal expansion and contraction compensation. To improve positioning stability, limiting edges and positioning stops are set on both sides of the storage position. After the air guide plate rotates in, it achieves terminal positioning by contacting the end face with the stop. Specifically, a snap-fit ​​can be set to form a slight pre-tightening to reduce vibration and abnormal noise. The two ends of the shaft are installed on the mounting base inside the housing 1, and axial retaining rings or shoulders are provided to prevent axial movement, ensuring the reliability of the air guide plate when repeatedly switching between storage and unfolding.

[0039] Specifically in the first embodiment, such as Figure 8 As shown, in the single air guide plate configuration, the storage position is used to accommodate the first air guide plate 31. Specifically in the second embodiment, such as Figure 2 As shown, in the dual-guide plate configuration, the two guide plates can rotate towards each other and fit together or nearly fit together within the gap to avoid interference. After the guide plates are retracted, the air outlet maintains a clear cross-section, facilitating low-resistance passage of circulating or fresh air in single-mode operation. Simultaneously, it reserves stroke and angle space for rapid switching to parallel airflow mode. Since there are no guide plates obstructing the flow, the fresh airflow from the fresh air fan 22 mixes directly with the circulating airflow from the circulating fan 21, i.e., operating in mixed-air mode.

[0040] In the embodiments of this application, the air guide plate adopts an arc-shaped cross-section structure. As it extends along the rotation axis to the space between the circulating fan 21 and the fresh air fan 22 and then extends to the other side of the housing 1, its end points to the other side of the housing 1, forming a continuous guide surface. The arc shape allows the incoming flow to remain attached to the guide surface, reducing the separation and recirculation areas. The airflow transitions along the arc surface into the outlet section, resulting in a smoother flow direction.

[0041] In addition, to ensure the rigidity and shape accuracy of the curved surface, the air guide plate can adopt a composite configuration of outer arc surface and outer reinforcing rib, and a thickened edge is set near the rotating shaft to improve the resistance to torsion and flexure.

[0042] Specifically in the second embodiment, such as Figure 3 As shown, when the first air guide plate 31 and the second air guide plate 32 simultaneously unfold between the two fans and extend to the other side of the casing 1, they form a V-shaped airflow pair in space. The leading edges of the two air guide plates are close together between the two fans, and the trailing edges open downstream, forming a V-shaped airflow surface with the apex facing the fan and the opening facing the air outlet area. The V-shaped geometry makes the two airflow surfaces mirror each other, respectively defining the near-wall side boundaries of the fresh air and the circulating air. The air outlet section is thus divided into two adjacent parallel channels, avoiding initial section collision and reducing shear layer entrainment.

[0043] During operation, the airflow slides along the herringbone-shaped guide surface, suppressing the vortex in the central region. The streamlines extend smoothly to the outlet 12 in the parallel section, resulting in a more balanced outlet velocity distribution and reduced superimposed noise and additional drag. The overall herringbone arrangement maintains a compact structure while achieving spatial isolation and directional guidance of the two airflows, providing a geometric basis for stable air supply under multiple operating conditions.

[0044] In the embodiments of this application, such as Figure 2As shown, the housing 1 is arranged opposite to each other on one side. Internally, it is divided by a partition into a fresh air inlet chamber 112 and a recirculating air inlet chamber 111, forming a continuous outlet chamber 113 between the fan outlet side and the other side of the housing 1. The fresh air inlet chamber 112 is adjacent to the inlet end of the fresh air fan 22, and the recirculating air inlet chamber 111 is adjacent to the inlet end of the recirculating fan 21. The two inlet chambers are arranged side-by-side in the transverse direction of the housing 1. The partition extends from the inlet side to the fan installation area, defining two independent air intake paths and reducing mutual interference and crossflow. The outlet chamber 113 is located at the fan outlet end and extends along the depth direction of the housing 1 to the other side, serving as a space for the convergence and rectification of recirculating and fresh airflows, and is connected to the area of ​​the two side-by-side outlets 12.

[0045] To facilitate assembly and maintenance, an inspection window or detachable fastening point is reserved between the partition and the housing 1 to ensure the assembly and disassembly of the fan and the air guide assembly 3. The structure of the inlet chamber and the outlet chamber allows the two air intakes to be spatially isolated upstream and discharged in parallel downstream within a controlled boundary, maintaining a stable flow pattern and outlet velocity distribution.

[0046] In the embodiments of this application, the surfaces of the air guide plates (first air guide plate 31 and second air guide plate 32) are provided with concave and convex structures, such as micron-level grooves or fine protrusions, forming a biomimetic drag-reducing interface. The texture is arranged along the main airflow direction or at a small angle, so that the near-wall layer forms a stable quasi-laminar flow zone within the grooves, weakening lateral shear and secondary flow, and reducing adhesion friction and boundary layer separation tendency. When the airflow passes through the textured surface, the near-wall vorticity is suppressed, the streamlines are more closely attached to the guide surface, and the components caused by turbulent pressure pulsation in the noise source term are reduced, thereby improving the flow stability and outlet velocity distribution consistency in the parallel discharge stage.

[0047] Specifically, surface microstructures can be obtained on the air guide plate substrate through methods such as in-mold texturing, laser etching, chemical etching, sandblasting, or thin film coating. The depth and pitch of the texture are designed to transition smoothly with the curvature of the air guide plate, avoiding additional separation caused by abrupt edge changes. When the air guide plate is recessed into the gap between the outlet ends of the two fans, the texture does not affect the end-position fit and seal. The material can be an engineering plastic or metal substrate with wear-resistant, anti-fouling, and easy-to-clean properties, coated with a wear-resistant coating, maintaining the geometric stability of the texture and the drag reduction effect during long-term operation.

[0048] This application also proposes an air conditioner, which can be a fresh air unit of a fresh air system, including the above-mentioned air duct structure. The air outlet cavity of the air duct structure is equipped with a heat exchanger to regulate the temperature of fresh air and circulating air. In addition, a filter screen can be installed in the air outlet of the shell or inside the shell to filter the air and improve the air supply quality.

[0049] By employing this duct structure, along with the air guide vanes of the air guide assembly, air conditioners or fresh air units maintain independent flow paths for recirculated and fresh air during the air outlet phase, preventing interference or turbulence between the two airflows in the outlet area. This structure not only effectively reduces outlet resistance but also makes the airflow direction more focused and stable, thereby improving the overall air delivery efficiency of the system.

[0050] 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.

[0051] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0052] 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 duct structure, characterized in that, include: The housing has a circulating air inlet and a fresh air inlet on one side; and multiple air outlets on the other side. A circulating fan and a fresh air fan are installed inside the housing. The air inlet side of the circulating fan is connected to the circulating air inlet, and the air inlet side of the fresh air fan is connected to the fresh air inlet. The air outlet sides of the circulating fan and the fresh air fan form an air outlet duct that simultaneously connects to multiple air outlets. An air guide assembly is installed on the air outlet side of the fan. The air guide plate of the air guide assembly can be extended to a position between the circulating fan and the fresh air fan and facing the other side of the housing, so that the fresh air flow and the circulating air flow are formed in parallel in the air outlet duct to avoid airflow collision.

2. The air duct structure according to claim 1, characterized in that, The air outlets are arranged side by side, with the air outlet side of the circulating fan facing one air outlet and the air outlet side of the fresh air fan facing the other air outlet.

3. The air duct structure according to claim 2, characterized in that, The air guide assembly includes: The first air guide plate is rotatably set on the air outlet side of the fresh air fan. The first air guide plate can be rotated from the position where the air outlet side of the fresh air fan is closed to the position between the circulating fan and the fresh air fan and facing the other side of the housing. The driving component drives the first air guide plate to rotate.

4. The air duct structure according to claim 2, characterized in that, The air guide assembly includes: The first air guide plate is rotatably set on the air outlet side of the fresh air fan. The first air guide plate can be rotated from the position where the air outlet side of the fresh air fan is closed to the position between the circulating fan and the fresh air fan and facing the other side of the housing. The second air guide plate is rotatably set on the air outlet side of the circulating fan. The second air guide plate can be rotated from the position where the air outlet side of the circulating fan is closed to a position between the circulating fan and the fresh air fan and extending to the other side of the casing. A driving component is used to drive the first air guide plate and the second air guide plate to rotate respectively.

5. The air duct structure according to claim 3 or 4, characterized in that, The outlets of the circulating fan and the fresh air fan are arranged side by side at intervals, and the intervals form a storage position for the air guide plate. The air guide plate can be rotated to the storage position formed between the outlets of the circulating fan and the fresh air fan.

6. The air duct structure according to any one of claims 1 to 4, characterized in that, The air guide plate is arc-shaped. When the air guide plate is extended to the position between the circulating fan and the fresh air fan and facing the other side of the housing, its end faces the other side of the housing.

7. The air duct structure according to claim 4, characterized in that, When both the first and second air guide plates rotate to a position between the circulating fan and the fresh air fan and facing the other side of the casing, they form a V-shape.

8. The air duct structure according to any one of claims 1 to 4, characterized in that, The housing is arranged opposite to each other on one side; the interior of the housing is divided into a fresh air inlet chamber and a circulating air inlet chamber arranged side by side, and an air outlet chamber arranged between the fan outlet side and the other side of the housing.

9. The air duct structure according to any one of claims 1 to 4, characterized in that, The surface of the air guide plate is provided with a concave-convex structure.

10. An air conditioner, characterized in that, include: The air duct structure as described in any one of claims 1 to 9, wherein a heat exchanger is provided in the air outlet cavity of the air duct structure.

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