Air duct assembly and window air conditioner

Abstract

The application provides a wind channel assembly and a window type air conditioner. An air inlet cavity is formed in a shell, a centrifugal fan is installed in the air inlet cavity, and the centrifugal fan is arranged such that an air inlet surface thereof is parallel to a plane in which an air inlet is located, i.e. air flows along the extension direction of the air inlet cavity to the air inlet surface from the air inlet, and is then thrown from the periphery of the centrifugal fan. In addition, a first air outlet cavity, the air inlet cavity and a second air outlet cavity are sequentially connected in the shell, and the three air cavities are arranged on substantially the same horizontal plane, so that the plane in which the air outlet direction of the centrifugal fan is located is coplanar with the plane in which the three air cavities are located. In addition, the air flow thrown from both sides of the centrifugal fan avoids turning in the air inlet cavity during the process of entering the first air outlet cavity and the second air outlet cavity and flowing out through the first air outlet and the second air outlet, thereby reducing the air volume loss caused by the impact of the air flow on the inner wall surface in the air inlet cavity, and the air flow can uniformly flow into the first air outlet cavity and the second air outlet cavity, so that the air volume of the wind channel assembly is more uniform.

Description

Technical Field

[0001] This application relates to the field of air conditioning equipment technology, and more particularly to an air duct assembly and a window air conditioner. Background Technology

[0002] A window air conditioner is a small air conditioner that can be installed in a window.

[0003] Window air conditioners typically include an indoor module located on the indoor side and an outdoor module located on the outdoor side. The air duct assembly of the indoor module is used to draw in return air from the indoor side, perform heat exchange and temperature regulation, and then send it back to the indoor side.

[0004] In the prior art, the flow path of airflow in the duct assembly is relatively complex. The airflow needs to turn multiple times in the duct assembly and is prone to impacting the inner wall of the duct assembly, resulting in a large airflow loss in the duct assembly. Summary of the Invention

[0005] This application provides a duct assembly and a window air conditioner to solve the technical problem of large air volume loss in the duct assembly in the prior art.

[0006] On one hand, this application provides a duct assembly, including:

[0007] The housing has an air inlet cavity, a first air outlet cavity, and a second air outlet cavity formed inside the housing. The first air outlet cavity and the second air outlet cavity are located on both sides of the air inlet cavity, and the air inlet cavity is connected to the first air outlet cavity and the second air outlet cavity, respectively.

[0008] The housing is provided with an air inlet, a first air outlet and a second air outlet. The air inlet is connected to the air inlet cavity, the first air outlet is connected to the first air outlet cavity, and the second air outlet is connected to the second air outlet cavity.

[0009] The airflow direction from the air inlet cavity into the first air outlet cavity is collinear with the airflow direction into the second air outlet cavity;

[0010] A centrifugal impeller is installed inside the air inlet chamber, and the air inlet surface of the centrifugal impeller is parallel to the plane where the air inlet is located.

[0011] A heat exchanger that covers the air inlet.

[0012] In one possible implementation of this application, the air duct assembly further includes a baffle plate disposed on the side of the heat exchanger facing the air outlet;

[0013] The wind deflector includes a first wind deflector and a second wind deflector, the first wind deflector covering part of the first air outlet, and the second wind deflector covering part of the second air outlet;

[0014] The heat exchanger is arranged with both ends extending away from the air inlet and covering the first and second windbreaks.

[0015] In one possible implementation of this application, the first windbreak is arranged on the lower side near the first air outlet, and the second windbreak is arranged on the lower side near the second air outlet.

[0016] In one possible implementation of this application, a fresh air flow channel is formed on the lower side of each end of the shell, and the fresh air outlets of the two fresh air flow channels are respectively arranged on both sides of the heat exchanger;

[0017] The heat exchanger includes a first sub-section and two second sub-sections, with the two second sub-sections respectively disposed on both sides of the first sub-section;

[0018] The fins of the first sub-section are perpendicular to the plane of the air inlet, and the fins of the second sub-section are perpendicular to the plane of the fresh air outlet.

[0019] In one possible implementation of this application, the heat exchanger includes a heat exchange section and a leak-proof section, the heat exchange section is in the shape of a rectangular plate, and the leak-proof section is disposed on the upper side of the heat exchange section;

[0020] The heat exchange section covers the first windbreak section, the second windbreak section, and part of the air inlet, and the leak-proof section covers the remaining part of the air inlet.

[0021] In one possible implementation of this application, the leak-proof part is detachably connected to the heat exchange part.

[0022] In one possible implementation of this application, a flow guide groove is formed on the side surface of the baffle plate facing the heat exchanger.

[0023] In one possible implementation of this application, a transition cavity is formed between the air inlet cavity and the first air outlet cavity and the second air outlet cavity, and the flow cross-sectional area of ​​the transition cavity is smaller than the flow cross-sectional area of ​​the air inlet cavity, the first air outlet cavity and the second air outlet cavity.

[0024] In one possible implementation of this application, an arc-shaped air guide surface is provided on the inner wall of the housing forming the transition cavity.

[0025] On the other hand, this application also provides a window air conditioner, which includes an outdoor module and an indoor module, the outdoor module being connected to the indoor module, the indoor module including a cover and the aforementioned air duct assembly, the cover being mounted on the air duct assembly.

[0026] This application provides an air duct assembly and a window air conditioner. An air inlet cavity is formed within the housing, and a centrifugal impeller is installed within the air inlet cavity. The centrifugal impeller is positioned such that its air inlet surface is parallel to the plane of the air inlet. Airflow flows from the air inlet along the extension direction of the air inlet cavity to the air inlet surface, and then exits from around the centrifugal impeller. Furthermore, a first air outlet cavity, an air inlet cavity, and a second air outlet cavity are sequentially connected within the housing, and these three cavities are approximately arranged on the same horizontal plane. This ensures that the plane of the centrifugal impeller's air outlet direction is coplanar with the planes of the three air cavities. Consequently, the airflow ejected from both sides of the centrifugal impeller enters the first and second air outlet cavities and exits through the first and second air outlets, avoiding airflow deflection within the air inlet cavity. This reduces airflow loss caused by airflow impacting the inner wall of the air inlet cavity, and allows the airflow to flow evenly into the first and second air outlet cavities, resulting in a more uniform airflow distribution within the air duct assembly. Attached Figure Description

[0027] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0028] Figure 1 This is a schematic diagram of the structure of the air duct assembly provided in the embodiments of this application;

[0029] Figure 2 An exploded view of the air duct assembly provided in the embodiments of this application;

[0030] Figure 3 This is a schematic diagram of the structure of the shell provided in an embodiment of this application;

[0031] Figure 4 This is a schematic diagram of the structure of a heat exchanger provided in an embodiment of this application;

[0032] Figure 5 This is a schematic diagram of the structure of the wind deflector provided in an embodiment of this application.

[0033] Figure label:

[0034] The components include: air duct assembly 100, housing 200, air inlet cavity 210, air inlet 211, first air outlet cavity 220, first air outlet 221, second air outlet cavity 230, second air outlet 231, fresh air flow channel 240, fresh air outlet 241, transition cavity 250, arc-shaped air guide surface 251, centrifugal impeller 300, heat exchanger 400, first sub-section 410, second sub-section 420, heat exchange section 430, leak-proof section 440, wind baffle 500, first wind baffle section 510, second wind baffle section 520, guide groove 530, and main body 540. Detailed Implementation

[0035] 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 a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0036] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. 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, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, 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. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0040] Please refer to Figures 1 to 5 This application provides an air duct assembly 100, including: a housing 200, the housing 200 having an air inlet 210, a first air outlet 220, and a second air outlet 230 formed inside, the first air outlet 220 and the second air outlet 230 being located on opposite sides of the air inlet 210, and the air inlet 210 being connected to the first air outlet 220 and the second air outlet 230 respectively; the housing 200 having an air inlet 211, a first air outlet 221, and a second air outlet 231, the air inlet 211 being connected to... An air inlet 210 is connected to an air outlet 221, and a second air outlet 231 is connected to an air outlet 230. The airflow direction from the air inlet 210 into the first air outlet 220 is collinear with the airflow direction into the second air outlet 230. A centrifugal impeller 300 is installed inside the air inlet 210, and the air inlet surface of the centrifugal impeller 300 is parallel to the plane where the air inlet 211 is located. A heat exchanger 400 covers the air inlet 211.

[0041] It should be noted that the air duct assembly 100 provided in this application embodiment is particularly suitable for window air conditioners (not shown in the figure). Alternatively, the air duct assembly 100 provided in this application embodiment is also suitable for wall-mounted air conditioners or cabinet air conditioners, etc. The air inlet surface of the centrifugal impeller 300 is a plane perpendicular to the rotation axis of the centrifugal impeller 300. The airflow enters the centrifugal impeller 300 from the air inlet surface. The air inlet surface of the centrifugal impeller is parallel to the plane where the air inlet 211 is located, that is, the air inlet surface of the centrifugal impeller 300 is set directly opposite the air inlet 211, so that the airflow can flow directly from the air inlet 211 into the centrifugal impeller 300.

[0042] By creating an air inlet cavity 210 within the housing 200, a centrifugal impeller 300 is installed within the air inlet cavity 210, and the centrifugal impeller 300 is positioned such that its air inlet surface is parallel to the plane of the air inlet 211. This means that airflow passes through the air inlet 211 along the extension direction of the air inlet cavity 210 towards the air inlet surface, and then exits from around the centrifugal impeller 300. Furthermore, a first air outlet cavity 220, an air inlet cavity 210, and a second air outlet cavity 230 are sequentially connected within the housing 200, and these three cavities are approximately arranged on the same horizontal plane, allowing the centrifugal impeller to... The plane of the air outlet direction of 300 is coplanar with the plane of the three air chambers mentioned above. As a result, the airflow thrown out from both sides of the centrifugal impeller 300 will enter the first air outlet chamber 220 and the second air outlet chamber 230 and flow out through the first air outlet 221 and the second air outlet 231. This avoids the airflow turning in the air inlet chamber 210, thereby reducing the air volume loss caused by the airflow impacting the inner wall surface in the air inlet chamber 210. Moreover, the airflow can flow evenly into the first air outlet chamber 220 and the second air outlet chamber 230, making the air volume of the air duct assembly 100 more uniform.

[0043] In particular, in the prior art, the air duct assembly 100 using a cross-flow fan has a smaller air volume on both sides of the cross-flow fan compared to the air volume in the middle, resulting in a smaller air volume on both sides of the air outlet of the air duct assembly 100. However, in this application, because a centrifugal fan 300 is provided, and the air inlet surface of the centrifugal fan 300 is parallel to the plane where the air inlet 211 is located, the first air outlet 221 and the second air outlet 231 can be set on both sides of the air inlet 211, so that the airflow exits from both sides of the air duct assembly 100, resulting in a more uniform distribution of indoor airflow.

[0044] Specifically, the housing 200 is rectangular, which makes it well-suited for window air conditioners; and the air inlet cavity 210, the first air outlet cavity 220 and the second air outlet cavity 230 are all cubic, so that the three side-by-side air cavities can make greater use of the internal space of the rectangular housing 200, thereby improving the space utilization rate of the internal cavity of the housing 200.

[0045] Furthermore, the adjacent inner sidewalls connecting the air inlet cavity 210, the first air outlet cavity 220, and the second air outlet cavity 230 are chamfered, making the interior of the three parallel air cavities smoother, effectively reducing the impact loss of airflow when flowing in the three cavities, and increasing the air supply volume.

[0046] Furthermore, in some other embodiments, the air inlet cavity 210, the first air outlet cavity 220 and the second air outlet cavity 230 may also be cylindrical cavities, without further limitation here.

[0047] Please refer to Figure 1 , Figure 2 and Figure 5In some embodiments, the air duct assembly 100 further includes a baffle plate 500, which is disposed on the side of the heat exchanger 400 facing the air outlet. The baffle plate 500 includes a first baffle portion 510 and a second baffle portion 520. The first baffle portion 510 covers a portion of the first air outlet 221, and the second baffle portion 520 covers a portion of the second air outlet 231. Both ends of the heat exchanger 400 extend away from the air inlet 211 and cover the first baffle portion 510 and the second baffle portion 520.

[0048] Understandably, since the air inlet 210, the first air outlet 220 and the second air outlet 230 are arranged side by side, the air inlet 211 occupies only about one-third of the front panel space of the air duct assembly 100, which results in a small area of ​​the heat exchanger 400 covering only the air inlet 211, leading to a low heat exchange efficiency of the air duct assembly 100.

[0049] It should be noted that during the process of the air entering the air inlet cavity 210 through the air inlet 211, the airflow on the indoor side gradually narrows into the air inlet 211 in a "trumpet shape".

[0050] It should also be noted that, in order to maximize the use of the internal space of the housing 200, the first air outlet 221 and the second air outlet 231 in this embodiment have a large area, which will reduce the speed of the airflow flowing out through the first air outlet 221 and the second air outlet 231, thereby reducing the diffusion radiation range of the air outlet of the air duct assembly 100.

[0051] By setting up a baffle plate 500, and having the first baffle 510 cover part of the first air outlet 221 and the second baffle 520 cover part of the second air outlet 231, and further extending both ends of the heat exchanger 400 to cover the first baffle 510 and the second baffle 520; on the one hand, under the condition of the same air volume in the first air outlet cavity 220, the first baffle 510 reduces the area of ​​the first air outlet 221, thereby increasing the airflow velocity through the first air outlet 221 and expanding the diffusion and radiation range of the air outlet 221; on the other hand, since the first baffle 510 is set between the heat exchanger 400 and the first air outlet cavity 220, it avoids the mutual interference between the airflow in the first air outlet cavity 220 and the airflow through the air inlet cavity 210 of the heat exchanger 400, thereby increasing the air volume of the first air outlet 221; the effect and principle achieved by the second baffle 520 are the same as those of the first baffle 510 described above, and will not be elaborated on further here.

[0052] In particular, since the first baffle 510 and the second baffle 520 are respectively arranged on both sides of the air inlet 211, and the two ends of the heat exchanger 400 extend and cover the first baffle 510 and the second baffle 520, heat exchange channels (not shown in the figure) are formed between the first baffle 510 and the second baffle 520 and the heat exchanger 400, extending to the air inlet 211. This makes the "trumpet-shaped" airflow on the indoor side match the shape of the heat exchanger 400. Consequently, the airflow at the center of the "trumpet-shaped" airflow on the indoor side can directly enter the air inlet cavity 210, while the airflow at the two side edges can enter the air inlet cavity 210 through the heat exchange channels. This can increase the contact area between the indoor airflow and the heat exchanger 400, prolong the time that some airflow spends in the heat exchanger 400, and improve the heat exchange efficiency of the heat exchanger 400.

[0053] Specifically, the wind deflector 500 also includes a main body 540, and the first wind deflector 510 and the second wind deflector 520 are both disposed on the main body 540.

[0054] In some embodiments, the first windbreak 510 is arranged near the lower side of the first air outlet 221, and the second windbreak 520 is arranged near the lower side of the second air outlet 231.

[0055] It is understandable that window air conditioners are usually only in cooling mode most of the time, and cold air tends to sink. Therefore, those skilled in the art usually choose to point the air outlet of the air conditioner upwards when the cooling mode is on in order to improve the cooling effect.

[0056] By arranging a first windbreak 510 near the lower side of the first air outlet 221 and a second windbreak 520 near the lower side of the second air outlet 231, the remaining portions of the first air outlet 221 and the second air outlet 231 are located on the upper side of the heat exchanger 400, thereby causing the airflow of the duct assembly 100 to blow upwards, making the cold air blown out by the window air conditioner more evenly distributed on the indoor side.

[0057] In some embodiments, a fresh air flow channel 240 is formed on the lower side of both ends of the housing 200, and the fresh air outlets 241 of the two fresh air flow channels 240 are respectively arranged on both sides of the heat exchanger 400.

[0058] It should be noted that the fresh air duct 240 extends to the outdoor side at one end and to the indoor side at the other end; wherein, the fresh air duct 240 has a fresh air inlet at the outdoor end and a fresh air outlet 241 at the indoor end.

[0059] In addition, as mentioned above, since a heat exchange channel is formed between the first wind baffle 510, the second wind baffle 520 and the heat exchanger 400, a fresh air channel 240 is provided on the lower side of both ends of the shell 200, and the fresh air outlet 241 is arranged on the side of the heat exchanger 400. Under the action of negative pressure in the air inlet cavity 210, the airflow from the outside can enter the heat exchange channel through the fresh air outlet 241, and finally enter the air inlet cavity 210 through the air inlet 211.

[0060] In this way, the air duct component 100 can draw in fresh outdoor air and deliver it to the indoor side, improving the air quality delivered by the air duct component 100; and the fresh air flows through the heat exchanger 400, which can regulate the temperature of the fresh air, thereby reducing large fluctuations in indoor temperature difference when the heat exchange module turns on the fresh air mode, resulting in a better user experience.

[0061] Furthermore, in some other embodiments, a damper (not shown in the figure) can be provided in the fresh air duct 240 to open and close the fresh air duct 240, so that the user can choose whether to turn on the fresh air mode as needed.

[0062] Please refer to Figure 1 , Figure 2 and Figure 4 In some embodiments, the heat exchanger 400 includes a first sub-section 410 and two second sub-sections 420, which are respectively disposed on both sides of the first sub-section; the fins of the first sub-section 410 are perpendicular to the plane of the air inlet 211, and the fins of the second sub-sections 420 are perpendicular to the plane of the fresh air outlet 241.

[0063] It should be noted that, since the fresh air outlet 241 is located on the lower side of both ends of the housing 200, the plane of the fresh air outlet 241 is perpendicular to the plane of the air inlet 211, that is, the air outlet direction of the fresh air outlet 241 is perpendicular to the air inlet direction of the air inlet 211.

[0064] It should also be noted that the heat exchanger 400 typically consists of condenser tubes and finned plates. The heat in the condenser tubes is transferred to the fins, and the fins radiate heat to the surrounding air. After the airflow passes over the surface of the fins, it exchanges heat with the surrounding air, thereby changing the temperature of the airflow passing through the heat exchanger 400.

[0065] Therefore, by setting a first sub-section 410 and a second sub-section 420, with the second sub-section 420 corresponding to the fresh air outlet 241 and the first sub-section 410 corresponding to the air inlet 211; since most of the indoor return air enters the air inlet cavity 210 through the first sub-section 410, setting the fins of the first sub-section 410 located in the middle perpendicular to the air inlet 211 can improve the heat exchange effect of the indoor return air. In addition, setting the fins of the second sub-section 420 located on both sides perpendicular to the fresh air outlet 241 can improve the heat exchange effect of the fresh air.

[0066] Preferably, the first sub-section 410 and / or the second sub-section 420 are parallel flow heat exchangers.

[0067] The fins of the parallel flow heat exchanger are V-shaped, which can increase the heat exchange area of ​​the parallel flow heat exchanger and improve the structural strength of the parallel flow heat exchanger according to the principle of triangular stability. In addition, compared with other types of fins, the V-shaped fins can better disperse the limited air boundary, promote the lengthening of the air flow path, and improve the heat exchange effect of the heat exchanger 400.

[0068] Furthermore, in some other embodiments, the first sub-part 410 and / or the second sub-part 420 may also be a toothed heat exchanger, etc., without further limitation.

[0069] In some embodiments, the heat exchanger 400 includes a heat exchange section 430 and a leak-proof section 440. The heat exchange section 430 is in the shape of a rectangular plate, and the leak-proof section 440 is disposed on the upper side of the heat exchange section 430. The heat exchange section 430 covers the first windbreak section 510, the second windbreak section 520 and part of the air inlet 211, and the leak-proof section 440 covers the remaining part of the air inlet 211.

[0070] It is understood that the first windshield 510 and the second windshield 520 are preferably located near one side edge.

[0071] Therefore, in order to reduce the interference between the airflow entering the heat exchanger 400 at the air inlet 211 and the airflow exiting at the first air outlet 221 and the second air outlet 231, the heat exchange section 430 is set as a rectangular plate. The heat exchange section 430 only covers part of the air inlet 211, and a leak-proof section 440 is provided to cover the remaining air inlet 211. On the one hand, the structure of the heat exchange section 430 can be simplified. On the other hand, the area where the airflow entering the heat exchanger 400 is located is all close to one side of the shell 200, so that the area where the airflow entering the heat exchanger 400 is located and the area where the airflow exits are located are spaced apart and have no overlapping areas, which effectively avoids the interference between the airflow entering the heat exchanger 400 and the airflow exiting the air duct assembly 100.

[0072] Furthermore, in some other embodiments, the heat exchange section 430 of the heat exchanger 400 is convex, that is, the heat exchange section 430 completely covers the air inlet 211 without the need to provide a leak-proof section 440, which is not further limited here.

[0073] In some embodiments, the leak-proof part 440 is detachably connected to the heat exchange part 430.

[0074] By making the leak-proof part 440 and the heat exchange part 430 detachably connected, the heat exchanger 400 can be divided into the heat exchange part 430 and the leak-proof part 440, which are both rectangular plates. This simplifies the structure of the heat exchange part 430 and the leak-proof part 440 and facilitates the assembly and installation of the heat exchanger 400.

[0075] In some embodiments, a guide groove 530 is formed on the side surface of the baffle 500 facing the heat exchanger 400.

[0076] It is understandable that fresh air needs to flow through the surfaces of the first windbreak 510 and the second windbreak 520 before entering the air inlet 211. Therefore, the flow path of fresh air is relatively long, and fresh air is prone to diffuse in all directions during the process of flowing through the windbreak 500.

[0077] By setting a guide channel 530 on the surface of the baffle 500, fresh air can be guided to converge at the deepest recess in the middle of the guide channel 530, which effectively reduces the diffusion loss of fresh air and indoor return air and increases the air volume of the duct assembly 100.

[0078] Preferably, guide grooves 530 are formed on the surfaces of both the first windbreak portion 510 and the second windbreak portion 520.

[0079] Specifically, the surface shape of the heat exchanger 400 matches the surface shape of the baffle plate 500, which can increase the heat exchange area of ​​the heat exchanger 400 and improve the heat exchange effect of the air duct assembly 100.

[0080] In some embodiments, a transition cavity 250 is formed between the air inlet cavity 210 and the first air outlet cavity 220 and the second air outlet cavity 230, and the flow cross-sectional area of ​​the transition cavity 250 is smaller than the flow cross-sectional area of ​​the air inlet cavity 210, the first air outlet cavity 220 and the second air outlet cavity 230.

[0081] It should be noted that the cross section of the tube orifice perpendicular to the flow stream is called the flow passage cross section, and its size is called the flow passage cross area. In this application, the airflow flows from the air inlet cavity 210 into the first air outlet cavity 220 and the second air outlet cavity 230 respectively. Therefore, the cross area in the direction of the airflow from the air inlet cavity 210 into the first air outlet cavity 220 or the second air outlet cavity 230 is the flow passage cross area.

[0082] It should also be noted that the airflow speed increases when air flows from a pipe with a larger flow cross-sectional area into a pipe with a smaller flow cross-sectional area.

[0083] Therefore, by setting the transition cavity 250, the airflow velocity in the first air outlet cavity 220 and the second air outlet cavity 230 can be increased, thereby expanding the air outlet diffusion range of the air duct assembly 100. In addition, since the airflow directions thrown out from the centrifugal impeller 300 are different, the transition cavity 250 can constrain and adjust the airflow direction entering the first air outlet cavity 220 and the second air outlet cavity 230, so that most of the airflow direction is roughly the same, which has a certain rectification effect, effectively reducing the generation of vortices in the first air outlet cavity 220 and the second air outlet cavity 230, thereby reducing the airflow loss of the air duct assembly 100 and reducing air noise.

[0084] In some embodiments, an arc-shaped air guide surface 251 is provided on the inner wall of the housing 200 forming the transition cavity 250.

[0085] The airflow can flow smoothly over the arc-shaped air guide surface 251, reducing the impact loss when the airflow flows through the transition cavity 250 and increasing the air volume of the air duct assembly 100.

[0086] This application also provides a window air conditioner, which includes an outdoor module (not shown in the figure) and an indoor module (not shown in the figure). The outdoor module is connected to the indoor module. The indoor module includes a cover (not shown in the figure) and the air duct assembly 100 described above. The cover is placed over the air duct assembly 100. Since this window air conditioner has the aforementioned air duct assembly 100, it has all the same beneficial effects, which will not be described again here.

[0087] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0088] The above provides a detailed description of the air duct assembly 100 and window air conditioner provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A duct assembly, characterized in that, include: The housing has an air inlet cavity, a first air outlet cavity, and a second air outlet cavity formed inside the housing. The first air outlet cavity and the second air outlet cavity are located on both sides of the air inlet cavity, and the air inlet cavity is connected to the first air outlet cavity and the second air outlet cavity, respectively. The housing is provided with an air inlet, a first air outlet and a second air outlet. The air inlet is connected to the air inlet cavity, the first air outlet is connected to the first air outlet cavity, and the second air outlet is connected to the second air outlet cavity. The airflow direction from the air inlet cavity into the first air outlet cavity is collinear with the airflow direction into the second air outlet cavity; A centrifugal impeller is installed inside the air inlet chamber, and the air inlet surface of the centrifugal impeller is parallel to the plane where the air inlet is located. A heat exchanger that covers the air inlet; A transition cavity is formed between the air inlet cavity and the first air outlet cavity and the second air outlet cavity. The flow cross-sectional area of ​​the transition cavity is smaller than that of the air inlet cavity, the first air outlet cavity and the second air outlet cavity. An arc-shaped air guide surface is provided on the inner side wall of the shell forming the transition cavity. The air duct assembly also includes a baffle plate, which is disposed on the side of the heat exchanger facing the air outlet; The wind deflector includes a first wind deflector and a second wind deflector, the first wind deflector covering part of the first air outlet, and the second wind deflector covering part of the second air outlet; The heat exchanger is arranged so that both ends extend away from the air inlet and cover the first and second windbreaks.

2. The air duct assembly as described in claim 1, characterized in that, The first windbreak is arranged on the lower side near the first air outlet, and the second windbreak is arranged on the lower side near the second air outlet.

3. The air duct assembly as described in claim 1, characterized in that, A fresh air flow channel is formed on the lower side of each end of the shell, and the fresh air outlets of the two fresh air flow channels are respectively arranged on both sides of the heat exchanger. The heat exchanger includes a first sub-section and two second sub-sections, with the two second sub-sections respectively disposed on both sides of the first sub-section; The fins of the first sub-section are perpendicular to the plane of the air inlet, and the fins of the second sub-section are perpendicular to the plane of the fresh air outlet.

4. The air duct assembly as described in claim 1, characterized in that, The heat exchanger includes a heat exchange section and a leak-proof section. The heat exchange section is in the shape of a rectangular plate, and the leak-proof section is located on the upper side of the heat exchange section. The heat exchange section covers the first windbreak section, the second windbreak section, and part of the air inlet, and the leak-proof section covers the remaining part of the air inlet.

5. The air duct assembly as described in claim 4, characterized in that, The leak-proof part is detachably connected to the heat exchange part.

6. The air duct assembly as claimed in claim 1, characterized in that, A flow guide groove is formed on the side surface of the baffle plate facing the heat exchanger.

7. A window air conditioner, characterized in that, The window air conditioner includes an outdoor module and an indoor module, the outdoor module being connected to the indoor module, the indoor module including a cover and a duct assembly as described in any one of claims 1-6, the cover being fitted over the duct assembly.

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