Air duct assembly, air conditioner indoor unit and air conditioner unit

Abstract

The utility model relates to an air duct assembly, an air conditioner indoor unit and an air conditioner unit, and the air duct assembly comprises a shell, a first opening is formed in the middle area in the first direction; the two centrifugal fans are arranged at the two ends in the shell in the first direction respectively, each centrifugal fan comprises a centrifugal fan blade, the central axis of each centrifugal fan blade is consistent with the first direction, and a fan inlet is formed in the end, along the central axis, of each centrifugal fan; the water receiving component is installed in the shell through the first opening, the water receiving component is of a cylindrical structure and extends in the first direction, the water receiving component is connected between the two centrifugal fans, flow collecting openings are formed in the two ends of the water receiving component and communicate with fan inlets in the same side, a second opening is formed in the side wall, close to the first opening, of the water receiving component in the second direction, and the second opening communicates with the fan inlets in the second direction. The second direction is perpendicular to the first direction; and the heat exchanger is arranged in the second opening and seals the second opening.

Description

Technical Field

[0001] This disclosure relates to the field of air conditioning unit technology, and in particular to a duct assembly, an indoor air conditioning unit, and an air conditioning unit. Background Technology

[0002] Centrifugal fans are widely used in air conditioning devices. Currently, when air conditioning devices are working, the internal air duct components often emit irregular and abnormal noises, which can affect the user experience to some extent. Utility Model Content

[0003] Embodiments of this disclosure provide a duct assembly, an indoor air conditioning unit, and an air conditioning unit that can reduce abnormal noise during the operation of the duct assembly.

[0004] According to a first aspect of this disclosure, a duct assembly is provided, comprising:

[0005] The housing has a first opening in the middle region along a first direction;

[0006] A centrifugal fan is located at the end of the casing along a first direction. The centrifugal fan includes centrifugal fan blades, the central axis of which is aligned with the first direction. The end of the centrifugal fan along the central axis has a fan inlet.

[0007] A water receiving component is installed inside the housing through a first opening. The water receiving component has a cylindrical structure and extends along a first direction. It is positioned on one side of the centrifugal fan along the first direction. A collection port is provided at the end of the water receiving component where the centrifugal fan is located, and this collection port communicates with the fan inlet on the same side. A second opening is provided on the side wall of the water receiving component along a second direction near the first opening, and this second direction is perpendicular to the first direction.

[0008] The heat exchanger is located inside the second opening, and the second opening is closed.

[0009] In some embodiments, the inner wall of the water receiving component is provided with a first guide portion on the side of the middle region near the collection port along the first direction. The first guide portion is configured to guide the airflow through the heat exchanger to the collection port on the corresponding side.

[0010] In some embodiments, the first guide portion includes at least two first ribs, with an airflow guiding channel formed between two adjacent first ribs. The first ribs extend from the bottom region of the water receiving component toward a direction away from the second opening and extend to the end of the water receiving component.

[0011] In some embodiments, the first rib extends in a spiral shape.

[0012] In some embodiments, the water receiving component has an end wall with a collection port facing the fan inlet, a first end of a first rib located in the bottom region of the water receiving component, a second end of the first rib extending to abut against the end wall, and the second ends of at least two first ribs abutting against different positions along the circumference of the end wall.

[0013] In some embodiments, the end wall is inclined toward the centrifugal fan from the radially outer side to the inner side along a first direction.

[0014] In some embodiments, the bottom of the water receiving component is provided with a water collection trough in the middle region along the first direction, and the inner sidewalls around the water collection trough are inclined to guide condensate into the water collection trough.

[0015] In some embodiments, the inner wall of the water receiving component is provided with a second guide portion, which is configured to guide condensate from the inner wall of the water receiving component into the water collection tank.

[0016] In some embodiments, the second guide member includes a second rib, the first end of which is located near the bottom region of the water collection tank;

[0017] The second end of the second rib extends to the top of the middle region of the water receiving component along the first direction, or the second end of the second rib extends to the top of the end of the water receiving component along the first direction.

[0018] In some embodiments, the second guide portion is disposed on the inner wall of the water receiving component on the side away from the second opening.

[0019] In some embodiments, the heat exchanger is an outwardly convex arc-shaped plate.

[0020] In some embodiments, the water receiving component includes a first sidewall segment and a second sidewall segment in the circumferential direction, the radial dimension of the second sidewall segment is larger than the radial dimension of the first sidewall segment, and the second opening is provided on the second sidewall segment.

[0021] In some embodiments, the centrifugal fan outlet is located in the top region, and the fan outlet discharges air in a second direction away from the heat exchanger, the second direction being perpendicular to the first direction;

[0022] The heat exchanger includes at least two heat exchange sections arranged along a third direction, the dimensions of the at least two heat exchange sections gradually decreasing from top to bottom along a first direction, and the third direction being perpendicular to the first and second directions.

[0023] In some embodiments, the heat exchanger is stepped on both sides along the first direction.

[0024] In some embodiments, the heat exchanger includes fins, and an air inlet channel is formed between the fins, the air inlet channel being inclined downward relative to the normal of its location.

[0025] In some embodiments, the centrifugal fan outlet is located in the top region, and the fan outlet discharges air in a second direction away from the heat exchanger.

[0026] The housing includes a top plate, on which a first air outlet and a second air outlet are provided. The first air outlet is located in an area outside the centrifugal fan along a first direction, and the second air outlet covers the fan outlet along the first direction. An air outlet channel is formed between the top of the water receiving component and the top plate, and the fan outlet is connected to the first air outlet through the air outlet channel.

[0027] In some embodiments, there are two centrifugal fans, which are respectively located at both ends of the housing along the first direction. The water receiving component is located between the two centrifugal fans, and the water receiving component has a collection port at both ends along the first direction.

[0028] In some embodiments, the central axis of the centrifugal fan blades is aligned with the first direction, and the heat exchanger as a whole extends along the first direction.

[0029] According to a second aspect of this disclosure, an air conditioning indoor unit is provided, including the fan assembly of the above embodiments.

[0030] According to a third aspect of this disclosure, an air conditioning unit is proposed, including the indoor unit of the above-described embodiments.

[0031] Based on the above technical solution, the air duct assembly of this embodiment designs the water receiving component as a cylindrical structure extending along a first direction, and the water receiving component is located on one side of the centrifugal fan. The heat exchanger closes the second opening on the water receiving component, so the heat exchanger and the water receiving component together form a cylindrical structure, serving as an air guiding structure. After the return airflow passes through the heat exchanger for heat exchange, it enters the inner cavity of the cylindrical water receiving component. When the airflow reaches the inner wall of the water receiving component, it flows into the fan inlet under the guidance of the inner wall, playing a pre-swirl role. This makes the gas flow field entering the centrifugal fan more uniform, and the upstream airflow in the centrifugal fan can reach the lower area more smoothly and be discharged in a timely manner. This prevents the downstream airflow from squeezing the upstream airflow, thereby preventing the centrifugal fan from vibrating or the downstream airflow from irregularly surging inside the centrifugal fan blades and forming a whistling sound. Therefore, by improving the air intake effect of the centrifugal fan, the abnormal noise generated during operation can be improved, and the user experience can be enhanced. Attached Figure Description

[0032] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this application, illustrate exemplary embodiments of this disclosure and are used to explain this disclosure, but do not constitute an undue limitation of this disclosure. In the drawings:

[0033] Figure 1 This is a schematic diagram of the structure of some embodiments of the air duct assembly disclosed herein.

[0034] Figure 2This is a schematic diagram of the structure of some embodiments of the water receiving component in the air duct assembly of this disclosure.

[0035] Figure 3 This is a schematic diagram of the structure of some embodiments of the heat exchanger in the air duct assembly of this disclosure.

[0036] Figure 4 for Figure 3 The side view of the heat exchanger shown.

[0037] Figure 5 This is a side view of some embodiments of the air duct assembly disclosed herein.

[0038] Figure 6 This is a schematic diagram of the structure of some other embodiments of the water receiving component in the air duct assembly of this disclosure.

[0039] Figure 7 for Figure 6 Side view of the water receiving component shown.

[0040] Figure 8 for Figure 6 A schematic diagram of the water-receiving component from another angle.

[0041] Explanation of reference numerals in the attached figures

[0042] 1. Casing; 11. Top plate; 12. Bottom plate; 13. Rear plate; 14. Front plate; 15. First opening; 10. First air outlet; 20. Second air outlet;

[0043] 2. Centrifugal fan; 21. Fan inlet; 22. Fan outlet; 23. Curved wall; 24. Volute tongue; 25. Centrifugal fan blade;

[0044] 3. Heat exchanger; 30. Air inlet duct; 31. First heat exchange section; 32. Second heat exchange section; 33. Third heat exchange section;

[0045] 4. Water receiving component; 40. Second opening; 41. First side wall section; 42. Second side wall section; 43. Inlet; 44. End wall; 45. First rib; 46. Water collection trough; 47. Second rib; 48. Flanged edge;

[0046] x, first direction; y, second direction; z, third direction. Detailed Implementation

[0047] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present disclosure or its application or use. The present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that the present disclosure will be thorough and complete, and will fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless specifically stated otherwise, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0048] The terms "first," "second," and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0049] In this disclosure, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0050] All terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0051] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0052] Based on the embodiments disclosed above, in the absence of explicit denial or conflict, the technical features of one embodiment may be advantageously combined with one or more other embodiments.

[0053] The inventors discovered through research that the ductwork components inside current air conditioning devices emit irregular and abnormal noise during operation. The main reason for this is the poor air delivery effect of the centrifugal fan within the ductwork component. For example, when the centrifugal fan outlet is located in the top region, the downstream airflow near the outlet is in the upper region, while the upstream intake airflow is in the lower region. If the intake airflow is uncoordinated or the flow field is uneven, the upstream airflow will accumulate in the upper region and cannot be smoothly discharged, thus causing abnormal noise from the centrifugal fan. Furthermore, if the downstream airflow forces the upstream airflow out, it will cause the fan to vibrate, or the downstream airflow will irregularly swirl within the centrifugal fan blades, creating a whistling sound. Therefore, this disclosure aims to improve the abnormal noise by improving the airflow of the centrifugal fan.

[0054] First, such as Figures 1 to 8 As shown, this disclosure proposes a duct assembly, which in some embodiments includes:

[0055] The housing 1 has a first opening 15 in the middle region along the first direction x;

[0056] Centrifugal fan 2 is located at the end of the housing 1 along the first direction x. Centrifugal fan 2 includes centrifugal fan blade 25. The central axis of centrifugal fan blade 25 is consistent with the first direction x. Centrifugal fan 2 has a fan inlet 21 at the end along the central axis.

[0057] A water receiving component 4 is installed inside the housing 1 through a first opening 15. The water receiving component 4 has a cylindrical structure and extends along a first direction x. It is located on one side of the centrifugal fan 2 along the first direction x. The water receiving component 4 has a collection port 43 at the end where the centrifugal fan 2 is located, which communicates with the fan inlet 21 on the same side. The water receiving component 4 has a second opening 40 along a second direction y near the side wall of the first opening 15, where the second direction y is perpendicular to the first direction x.

[0058] Heat exchanger 3 is disposed within the second opening 40 and the second opening 40 is closed.

[0059] Specifically, the housing 1 includes a front plate 14 and a rear plate 13 spaced apart along a second direction y, which is perpendicular to the first direction x. The first direction x can be the length direction of the housing 1, and the second direction y can be the width direction of the housing 1. The housing 1 may also include a top plate 11 and a bottom plate 12 spaced apart along a third direction z, which is perpendicular to the first direction x and the second direction y. The third direction z can be the height direction. The front plate 14 and the rear plate 13 are connected between the top plate 11 and the bottom plate 12. A first opening 15 may be provided on the front plate 14 and the bottom plate 12.

[0060] For example, one centrifugal fan 2 may be provided, or two centrifugal fans 2 may be provided, with the two centrifugal fans 2 respectively located at both ends of the housing 1 along the first direction x. The centrifugal fan 2 includes a volute assembly and centrifugal fan blades 25. The volute assembly may be formed by a structural member provided within the housing 1, or a portion of the wall of the housing 1 may be used as part of the volute assembly. The end of the volute assembly along the central axis has a fan inlet 21. For example, the housing 1 may be closed with side plates at both ends along the first direction x, so that the fan inlet 21 is located at the inner end of the centrifugal fan 2.

[0061] The water receiving component 4 has a cylindrical structure, which can be a cylindrical structure, or have different radial dimensions in different circumferential regions, or different radial dimensions in different axial regions, and cylindrical structures with different cross-sectional shapes are all protected within the scope of this disclosure.

[0062] After the airflow with a higher indoor temperature enters the shell 1 through the heat exchanger 3, condensation will be generated. Therefore, a water receiving component 4 is set up to collect the condensation. The existing water receiving component is generally designed in the form of a water receiving tray, which is located below the heat exchanger 3. In this way, after the return airflow passes through the heat exchanger 3, it flows freely in the return air cavity, resulting in uneven airflow into the fan inlet 21 of the centrifugal fan 2.

[0063] In this embodiment, the water receiving component 4 is designed as a cylindrical structure extending along the first direction x, and is located on one side of the centrifugal fan 2. The heat exchanger 3 closes the second opening 40 on the water receiving component 4. Thus, the heat exchanger 3 and the water receiving component 4 together form a cylindrical structure, serving as an air guiding structure. After the return airflow passes through the heat exchanger 3 for heat exchange, it enters the inner cavity of the cylindrical water receiving component 4. When the airflow reaches the inner wall of the water receiving component 4, it flows into the fan inlet 21 under the guidance of the inner wall, playing a pre-swirl role. This allows the gas to enter the centrifugal fan 2 evenly and orderly, and evenly distributes the airflow volume, thereby making the gas flow field entering the centrifugal fan 2 more uniform. The upstream airflow in the centrifugal fan 2 can reach the lower area more smoothly and be discharged in time, preventing the downstream airflow from squeezing the upstream airflow, thereby preventing the centrifugal fan 2 from vibrating or the downstream airflow from irregularly surging inside the centrifugal fan blades 25 and forming a whistling sound. Therefore, by improving the air intake effect of the centrifugal fan 2, the abnormal noise generated during operation can be improved, and the user experience can be enhanced.

[0064] In some embodiments, such as Figure 2 As shown, the inner wall of the water receiving component 4 is provided with a first guide portion on the side near the collection port 43 in the middle region along the first direction x. The first guide portion is configured to guide the airflow through the heat exchanger 3 to the collection port 43 on the corresponding side.

[0065] This embodiment, by providing a first guide on the inner wall of the water receiving component 4, can further guide the airflow through the first guide to enter the fan inlet 21 along a pre-set path, making the airflow more uniform and orderly before entering the fan inlet 21. The upstream airflow in the centrifugal fan 2 can reach the lower area more smoothly and be discharged in time, which can prevent the downstream airflow in the centrifugal fan 2 from squeezing the upstream airflow and reduce the abnormal noise generated when the centrifugal fan 2 is working.

[0066] In some embodiments, such as Figure 2 As shown, the first guide portion includes at least two first ribs 45, and an airflow guiding channel is formed between two adjacent first ribs 45. The first ribs 45 extend from the bottom region of the water receiving component 4 toward a direction away from the second opening 40 and extend to the end of the water receiving component 4.

[0067] In this embodiment, the first guide portion is designed as at least two first ribs 45. After the return airflow is heated by the heat exchanger 3, it enters the bottom area of ​​the water receiving component 4 or the area away from the second opening 40 along the second direction y. The airflow can flow towards the end of the water receiving component 4 along the airflow guide channel between the two adjacent first ribs 45 and outside the outermost first rib 45, and enter the fan inlet 21 in an orderly manner, reducing abnormal noise when the centrifugal fan 2 is working. Moreover, this first guide component has a simple structure, which makes it easy to limit the airflow guide path through the extension path of the first ribs 45.

[0068] In some embodiments, such as Figure 2 As shown, the first rib 45 extends in a spiral shape. A spiral through groove is formed between adjacent first ribs 45.

[0069] Alternatively, the first rib 45 may also be arc-shaped, straight-shaped, or a combination of different shapes.

[0070] Among them, such as Figure 2 As shown, the distance between two adjacent first ribs 45 from the beginning to the end of the airflow can be kept consistent to make the gas flow more uniform. Or, as... Figure 6 As shown, the distance between two adjacent first ribs 45 can gradually decrease from the beginning to the end of the airflow. In this way, as the gas flows to the end of the water receiving component 4, the gradually narrowing airflow guide channel can accelerate the airflow, compensate for the speed reduction of the gas during the flow process, and increase the speed and improve the air intake efficiency on the basis of orderly entry into the fan inlet 21.

[0071] In this embodiment, the first rib 45 is designed as a spiral extension structure. Based on the pre-swirl of the airflow through the cylindrical water receiving component 4, the airflow can be further directed to the end of the water receiving component 4 along the airflow guide channels on both sides of the first rib 45 in a spiral path. The spiral first rib 45 can reduce the flow loss of the airflow after passing through the heat exchanger 3, so that the airflow can maintain a certain air intake speed while entering the fan inlet 21 in an orderly manner, thereby improving the air intake efficiency.

[0072] In some embodiments, such as Figure 2 As shown, the water receiving component 4 has an end wall 44, on which a collection port 43 is provided that is directly opposite to the fan inlet 21. The first end of the first rib 45 is located in the bottom area of ​​the water receiving component 4, and the second end of the first rib 45 extends to abut against the end wall 44. At least two second ends of the first rib 45 abut against different positions along the circumference of the end wall 44.

[0073] At least two first ribs 45 have their first ends located in the bottom region of the water receiving component 4 and are spaced apart along the first direction x. Then, the second ends of the first ribs 45 extend upward from the inner wall away from the second opening 40 along the second direction y, for example, in a spiral shape, until the second ends of the first ribs 45 extend to the radial outer end of the end wall 44. The second ends of at least two first ribs 45 abut at different positions along the circumference of the end wall 44.

[0074] In this embodiment, after the return airflow undergoes heat exchange in the heat exchanger 3, it enters the bottom area of ​​the water receiving component 4 or the area opposite the heat exchanger 3. The airflow flows along the airflow guide channel between the two adjacent first ribs 45 and outside the outermost first rib 45 until it reaches the inner side of the end wall 44, and flows along the end wall 44 to the collection port 43, finally entering the fan inlet 21 in an orderly manner, which can improve the air intake effect of the centrifugal fan 2. By setting the end wall 44, the size of the collection port 43 can be matched with the fan inlet 21, and since the airflow moves along the inner wall of the water receiving component 4, when it reaches the end of the water receiving component 4, it can converge along the inner surface of the end wall 44 towards the middle area, which facilitates entry into the fan inlet 21.

[0075] In some embodiments, the end wall 44 is inclined toward the centrifugal fan 2 from the radially outer side to the inner side along the first direction x.

[0076] In this embodiment, the end wall 44 is set as an inclined structure, so that the end wall 44 forms a cone shape. When the airflow flows along the first rib 45 to the end of the water receiving component 4, it is further guided by the end wall 44 to flow towards the fan inlet 21 in the first direction x, and converges towards the collection port 43 during the flow, so as to flow into the fan inlet 21 more concentratedly.

[0077] In some embodiments, such as Figure 2 and Figure 6As shown, a water collecting trough 46 is provided in the middle region of the bottom of the water receiving component 4 along the first direction x. The inner sidewalls around the water collecting trough 46 are inclined to guide condensate into the water collecting trough 46. The inclined inner sidewalls gradually converge towards the water collecting trough 46 from top to bottom.

[0078] The water collection tank 46 is located in the middle area, and the two first guide parts are respectively located on both sides of the water collection tank 46 along the first direction x. This can guide the airflow passing through the heat exchanger 3 to flow directly to both ends of the water receiving component 4, avoiding the area where the water collection tank 46 is located, and can reduce the airflow from carrying the condensate in the water collection tank 46 into the centrifugal fan 2.

[0079] like Figure 2 As shown, the water receiving component 4 is cylindrical in shape, and the radial dimensions are different in different circumferential regions. The side walls of the water collecting trough 46 along the second direction y are naturally formed into inclined inner side walls by the cylindrical structure. On this basis, the side walls of the water collecting trough 46 along the first direction x can also be additionally provided with inclined inner side walls.

[0080] like Figure 6 As shown, with Figure 2 The difference lies in that the sidewalls of the water receiving component 4 and the second opening 40 have different radial dimensions along the first direction x. The radial dimension of the middle region where the water collecting tank 46 is located is greater than that of the two sides. As a result, the radial dimension of the sidewalls on both sides of the water collecting tank 46 along the first direction x gradually decreases from the middle to the sides, forming a conical structure. This structure is beneficial to make the sidewalls of the water collecting tank 46 along the first direction x also form an inclined structure, so that the entire circumference of the water collecting tank 46 forms an inclined structure, which facilitates the full entry of condensate into the water collecting tank 46.

[0081] A drain outlet can be installed at the bottom of the water collection tank 46 to drain the condensate in a timely manner.

[0082] In this embodiment, a water collecting trough 46 is provided in the middle area of ​​the bottom of the water receiving component 4 along the first direction x. The inner sidewall of the water collecting trough 46 is inclined to guide condensate into the water collecting trough 46. In this way, after the low temperature and humid air inside the water receiving component 4 condenses to form condensate, the condensate can flow along the inner sidewall of the water receiving component 4 into the water collecting trough 46 and be discharged from the water collecting trough 46. This prevents the condensate from being blown onto the human body by the violent movement of the airflow into the centrifugal fan 2 and being sent to the air outlet, thus improving the user experience. Furthermore, when a first guide part, such as a first protrusion 45, is provided on the inner wall of the water receiving component 4, the airflow colliding with the first guide part can also promote the condensation of water vapor in the humid air into condensate. The condensate can also flow along the first guide part to the bottom area of ​​the water receiving component 4 and finally flow into the water collecting trough 46.

[0083] In some embodiments, such as Figure 2 and Figure 6As shown, the inner wall of the water receiving component 4 is provided with a second guide portion, which is configured to guide the condensate on the inner wall of the water receiving component 4 into the water collection tank 46.

[0084] This embodiment, by providing a second guide section on the inner wall of the water receiving component 4, facilitates the collision of the incoming airflow with the second guide section, promoting the condensation of water vapor in the humid air into condensate. The condensate can flow along the second guide section into the water collection tank 46 and be promptly discharged from the water collection tank 46, preventing the condensate from being violently moved within the centrifugal fan 2 by the airflow and then blown onto the human body through the air outlet, thus improving the user experience. Furthermore, in embodiments where both a first guide section and a second guide section are provided within the water receiving component 4, the first guide section can guide the airflow into the fan inlet 21 in an orderly manner, and the first and second guide sections can jointly guide the condensate into the water collection tank 46.

[0085] In some embodiments, the second guide member includes a second rib 47, the first end of which is located near the bottom region of the water collection tank 46;

[0086] The second end of the second rib 47 extends to the top of the middle region of the water receiving component 4 along the first direction x, or the second end of the second rib 47 extends to the top of the end of the water receiving component 4 along the first direction x.

[0087] like Figure 2 As shown, the second end of the second rib 47 extends to the top of the middle region of the water receiving component 4 along the first direction x. This allows condensate in the middle region of the water receiving component 4 to flow directly down the second rib 47 into the water collection tank 46, while condensate in the side regions can flow down the first rib 45 into the water collection tank 46. The first end of the second rib 47 is located near the bottom of the water collection tank 46, ensuring smooth flow of condensate into the tank and preventing splashing of condensate from the tank into the airflow.

[0088] like Figure 6 and Figure 8 As shown, the second end of the second rib 47 extends to the top of the end of the water receiving component 4 along the first direction x. This second rib 47 also helps guide the airflow through the heat exchanger 3 to the end of the water receiving component 4. In addition, it can also cause water vapor in the gas about to flow out of the collection port 43 to condense. The formed condensate can flow along the first rib 45 and the second rib 47 into the water collection tank 46. The first end of the second rib 47 is located in the area near the bottom of the water collection tank 46, which allows the condensate to flow smoothly into the water collection tank 46 and prevents the condensate in the water collection tank 46 from splashing and mixing into the airflow.

[0089] In some embodiments, the second guide portion is disposed on the inner wall of the water receiving component 4 on the side away from the second opening 40.

[0090] In this embodiment, the second guide section is located on the inner wall of the water receiving component 4 on the side away from the second opening 40. This area has a large and continuous area for the second guide section, allowing it to extend along a certain path and ultimately guide the condensate into the water collection tank 46. Moreover, the second guide section is located on the side away from the heat exchanger 3, which prevents the airflow from directly impacting the second guide section and the condensate in the surrounding area after passing through the heat exchanger 3, thereby reducing the amount of condensate carried into the centrifugal fan 2 by the airflow.

[0091] In some embodiments, such as Figure 3 As shown, the heat exchanger 3 is an outwardly convex arc-shaped plate, for example, it can be arc-shaped. For example, the shape of the heat exchanger 3 can match the water receiving part 4, forming a smooth transition between the two to reduce gas flow resistance.

[0092] In this embodiment, the heat exchanger 3 is designed as an outwardly protruding arc-shaped plate, which allows for a smooth transition between the shape of the heat exchanger 3 and the cylindrical water receiving component 4. After passing through the heat exchanger 3, the airflow can flow smoothly along the inner wall of the water receiving component 4 to be guided to the end of the water receiving component 4 and enter the fan inlet 21, thereby reducing airflow loss. Moreover, the arc-shaped plate of the heat exchanger 3 increases the heat exchange surface area and improves the heat exchange efficiency.

[0093] In some embodiments, the water receiving component 4 includes a first sidewall segment 41 and a second sidewall segment 42 in the circumferential direction, the radial dimension of the second sidewall segment 42 is greater than the radial dimension of the first sidewall segment 41, and the second opening 40 is provided on the second sidewall segment 42.

[0094] like Figure 2 As shown, the rear area of ​​the water receiving component 4 is the first sidewall section 41, and the front area is the second sidewall section 42. Both of these sidewall sections can be arc-shaped.

[0095] like Figure 6 As shown, the middle region of the first sidewall segment 41 along the first direction x is arc-shaped, and the two side regions are conical walls that gradually taper from the middle to both ends. The second sidewall segment 42 can be arc-shaped, and its radial dimension can be greater than the maximum radial dimension of the middle region of the first sidewall segment 41.

[0096] In this embodiment, the water receiving component 4 is divided into two side wall sections along the circumference, and the second side wall section 42 used to house the heat exchanger 3 has a larger size. The increased surface area of ​​the second side wall section 42 helps to increase the heat exchange area of ​​the heat exchanger 3 and improve the heat exchange efficiency. Moreover, the centrifugal fan 2 is located at both ends of the water receiving component 4, and the increased radial size of the second side wall section 42 can match the size of the centrifugal fan 2.

[0097] In some embodiments, such as Figure 5As shown, the fan outlet 22 of the centrifugal fan 2 is located in the top region, and the fan outlet 22 discharges air in the direction away from the heat exchanger 3 along the second direction y, which is perpendicular to the first direction x.

[0098] The heat exchanger 3 includes at least two heat exchange sections arranged along a third direction z. The dimensions of the at least two heat exchange sections gradually decrease from top to bottom along a first direction x. The third direction z is perpendicular to the first direction x and the second direction x.

[0099] Specifically, a volute tongue 24 is provided on the inner side of the rear plate 13 of the housing 1. The volute tongue 24 is arc-shaped, with one end connected to the middle region of the rear plate 13 along the third direction x, and the other end extending towards the top plate 11 and away from the rear plate 13. An arc-shaped wall 23 is provided between the front plate 14 and the rear plate 13 at the bottom region of the centrifugal fan 25. The arc-shaped wall 23 and the front plate 14 together form the volute of the centrifugal fan 2, and the volute and the volute tongue 24 together form the volute assembly. After the airflow enters the centrifugal fan 2, it flows in the direction of the arrow. The bottom region is the upstream section A of the airflow, the middle region is the midstream section B of the airflow, and the upper region is the downstream section C of the airflow.

[0100] Specifically, such as Figure 5 As shown, the downstream section C of the airflow inside centrifugal fan 2 is close to the fan outlet 22. The airflow velocity in the downstream section C is greater than that in the midstream section B, and the airflow velocity in the midstream section B is greater than that in the upstream section A. Figure 3 As shown, the heat exchanger 3 includes three heat exchange sections arranged along the third direction z: a first heat exchange section 31, a second heat exchange section 32, and a third heat exchange section 33. The dimensions of these three heat exchange sections gradually decrease from top to bottom along the first direction x, forming a three-stage stepped heat exchange. Optionally, the heat exchanger 3 can have an arc-shaped structure, which ensures uniform heat exchange in the circumferential direction of the arc-shaped structure.

[0101] This embodiment takes into account that the airflow velocity is the highest near the top fan outlet 22 of the centrifugal fan 2. Therefore, the heat exchanger 3 is set with at least two heat exchange sections along the height direction, and the size of the at least two heat exchange sections gradually decreases from top to bottom along the first direction x. This makes the heat exchange area of ​​the heat exchanger 3 decrease from top to bottom, which corresponds to the airflow velocity distribution in the centrifugal fan 2. The heat exchange area is increased in the area with higher airflow velocity so that the gas passing through the heat exchanger 3 can be fully heat exchanged, while the heat exchange area is reduced in the area with lower airflow velocity. This makes the airflow temperature passing through the heat exchanger 3 more uniform, which can avoid the local airflow temperature alternation in the centrifugal fan 2 causing condensation and noise, or water vapor being discharged from the air duct affecting comfort.

[0102] In some embodiments, the heat exchanger 3 is stepped on both sides along the first direction x.

[0103] The heat exchanger 3 is symmetrically arranged relative to the cross-section of the middle region along the first direction x, which can make the heat exchanger 3 uniform in the first direction x and make the inlet air temperature of the centrifugal fans 2 on both sides consistent.

[0104] In this embodiment, the heat exchanger 3 is designed in a stepped shape on both sides along the first direction x. This ensures that the length of each heat exchange section along the first direction x remains consistent, facilitating manufacturing and avoiding sharp corners in each heat exchange section. This also makes installation easier and improves structural strength. Furthermore, the shape of the second opening 40 matches the heat exchanger 3 in a stepped shape. When the heat exchanger 3 is installed onto the second opening 40, each step of the second opening 40 provides support to both sides of the heat exchange section above, improving installation stability and robustness.

[0105] In some embodiments, such as Figure 4 As shown, the heat exchanger 3 includes fins, and an air inlet channel 30 is formed between the fins. The air inlet channel 30 is inclined downward relative to the normal of its location.

[0106] The heat exchanger 3 includes heat exchange tubes with multiple fins. An air inlet channel 30 can be formed between the fins of adjacent heat exchange tubes, and airflow can enter through the air inlet channel 30.

[0107] If the return airflow enters the water receiving component 4 along the normal direction of the heat exchanger 3, the airflow will be distributed on the inner wall of the water receiving component 4 on the opposite side of the heat exchanger 3, resulting in a relatively dispersed airflow. However, this embodiment allows the return airflow to enter at a preset angle α, tilted downwards relative to the normal direction of its location. This allows the airflow passing through the heat exchanger 3 to reach the bottom area of ​​the water receiving component 4. The airflow can then follow the first rib 45 from the first end at the bottom along a specific guide path to the fan inlet 21. After a more complete guide path, the airflow can enter more orderly and evenly, effectively improving the air intake efficiency of the centrifugal fan 2, improving the uneven internal flow field, preventing abnormal noise during the operation of the centrifugal fan 2, and avoiding condensation caused by localized hot and cold airflow alternation, preventing condensate from being discharged through the air outlet, and improving human comfort. Optionally, the first rib 45 is spiral-shaped, allowing the airflow passing through the heat exchanger 3 to spirally enter the centrifugal fan 2 axially, guiding the airflow to enter in an orderly and even manner.

[0108] In some embodiments, such as Figure 1 As shown, the fan outlet 22 of the centrifugal fan 2 is located in the top region, and the fan outlet 22 discharges air in the second direction y toward the direction away from the heat exchanger 3.

[0109] The housing 1 includes a top plate 11, on which a first air outlet 10 and a second air outlet 20 are provided. The first air outlet 10 is located in the area outside the centrifugal fan 2 along the first direction x, and the second air outlet 20 covers the fan outlet 22 along the first direction x. An air outlet channel is formed between the top of the water receiving component 4 and the top plate 11, and the fan outlet 22 is connected to the first air outlet 10 through the air outlet channel.

[0110] The top plate 11 can be provided with two first air outlets 10, which extend along the first direction x and can be rectangular strips or other shapes. The two first air outlets 10 are independent of each other and are arranged adjacent to each other along the first direction x, respectively supplying air to the centrifugal fans 2 on both sides. There are also two second air outlets 20, which are located outside the corresponding first air outlets 10 along the first direction x. The second air outlets 20 can be provided with grilles.

[0111] In this embodiment, the fan outlet 22 is located at the top of the centrifugal fan 2, and the first air outlet 10 and the second air outlet 20 are located on the top plate 11. The airflow from the centrifugal fan 2 can be discharged more smoothly from the air outlet. Moreover, an air outlet channel is formed between the top of the water receiving component 4 and the top plate 11. The airflow from the fan outlet 22 can reach the first air outlet 10 through the air outlet channel to achieve the main air outlet. At the same time, the airflow from the fan outlet 22 can also be discharged through the second air outlet 20 to achieve auxiliary air outlet. This allows the airflow from the centrifugal fan 2 to be discharged quickly and improves the air outlet efficiency.

[0112] In some embodiments, there are two centrifugal fans 2, which are respectively located at both ends of the housing 1 along the first direction x. The water receiving component 4 is located between the two centrifugal fans 2, and the water receiving component 4 is provided with a collection port 43 at both ends along the first direction x.

[0113] Specifically, in this embodiment, the collection ports 43 at both ends of the water receiving component 4 are respectively connected to the fan inlet 21 of the centrifugal fan 2 on the same side. The inner wall of the water receiving component 4 is provided with a first guide portion on both sides of the middle area along the first direction x. The first guide portion is configured to guide the airflow through the heat exchanger 3 to the collection port 43 on the corresponding side.

[0114] In this embodiment, centrifugal fans 2 are installed at both ends of the housing 1 along the first direction x. The airflow after heat exchange through the heat exchanger 3 can flow to both sides simultaneously and enter the centrifugal fans 2 through the corresponding side collection port 43 to achieve air outlet. This can improve the air outlet efficiency after heat exchange. Moreover, a longer air outlet can be provided on the housing 1 along the first direction x, which can improve the air outlet uniformity in the first direction x.

[0115] In some embodiments, the central axis of the centrifugal fan blade 25 is aligned with the first direction x, and the heat exchanger 3 extends along the first direction x as a whole.

[0116] In this embodiment, the centrifugal fan 2 and the heat exchanger 3 are arranged side by side in the first direction x, and the maximum dimension in the second direction y is the size of the centrifugal fan 2, which can reduce the thickness of the wall-mounted unit. Moreover, the heat exchanger 3 extends entirely along the first direction x, which allows the distance between the heat exchanger 3 and the fan inlet 21 of the centrifugal fan 2 to be greater. This prevents the large suction at the fan inlet 21 from causing the airflow to concentrate at the end of the heat exchanger 3, thereby improving the heat exchange uniformity of the heat exchanger 3 along the first direction x and also reducing the diameter of the cylindrical water receiving component 4. In addition, after the airflow passes through the heat exchanger 3 and flows out from the collection port 43, it can directly enter the fan inlet 21, which can reduce the gas flow resistance. Furthermore, this type of air duct assembly is relatively easy to manufacture.

[0117] Alternatively, the central axis of the centrifugal fan blade 25 may also be at an angle to the first direction x.

[0118] Optionally, centrifugal fans 2 are respectively provided at both ends of the shell 1, and the heat exchanger 3 can be designed in a bent shape. For example, the heat exchanger 3 is bent inward in the central area along the first direction x to form a V shape, which can make full use of the space between the two centrifugal fans 2 and increase the area of ​​the heat exchanger 3 to fully exchange heat with the return air entering the fan inlet 21 along both sides of the first direction x, thereby improving the heat exchange efficiency of the heat exchanger 3.

[0119] Secondly, this disclosure also provides an air conditioning indoor unit, including the air duct assembly of the above embodiments.

[0120] Because the air duct assembly in this embodiment can prevent the centrifugal fan 2 from vibrating or the downstream airflow from irregularly surging inside the centrifugal fan blades 25, thus preventing the abnormal noise generated by the indoor unit of the air conditioner during operation by improving the air intake effect of the centrifugal fan 2, improving the sound quality of the air supply of the indoor unit of the air conditioner, making the operation of the indoor unit of the air conditioner more stable, and improving the user experience.

[0121] Finally, this disclosure also provides an air conditioning unit, including the indoor unit of the above embodiments.

[0122] Since the indoor unit of the air conditioner in this embodiment can improve the abnormal noise generated during the operation of the indoor unit by improving the air intake effect of the centrifugal fan 2, the indoor unit of the air conditioner can operate more stably, thereby improving the working performance of the air conditioning unit and enhancing the user experience.

[0123] The duct assembly, indoor air conditioning unit, and air conditioning unit provided in this disclosure have been described in detail above. Specific embodiments have been used to illustrate the principles and implementation methods of this disclosure. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this disclosure. It should be noted that those skilled in the art can make various improvements and modifications to this disclosure without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this disclosure.

Claims

1. A duct assembly, characterized in that, include: The housing (1) has a first opening (15) in the middle region along the first direction (x); Centrifugal fan (2) is provided at the end of the housing (1) along a first direction (x), the centrifugal fan (2) includes centrifugal fan blades (25), and the centrifugal fan (2) has a fan inlet (21) at the end along the central axis; A water receiving component (4) is installed inside the housing (1) through the first opening (15). The water receiving component (4) has a cylindrical structure and extends along the first direction (x). The water receiving component (4) is located on one side of the centrifugal fan (2) along the first direction (x). The water receiving component (4) has a collection port (43) at the end where the centrifugal fan (2) is located. The collection port (43) is connected to the fan inlet (21) on the same side. The water receiving component (4) has a second opening (40) on the side wall near the first opening (15) along the second direction (y). The second direction (y) is perpendicular to the first direction (x). A heat exchanger (3) is disposed within the second opening (40) and the second opening (40) is closed.

2. The air duct assembly according to claim 1, characterized in that, The inner wall of the water receiving component (4) is provided with a first guide portion on the side of the middle region along the first direction (x) near the flow collection port (43). The first guide portion is configured to guide the airflow through the heat exchanger (3) to the flow collection port (43) on the corresponding side.

3. The air duct assembly according to claim 2, characterized in that, The first guide portion includes at least two first ribs (45), and an airflow guiding channel is formed between two adjacent first ribs (45). The first ribs (45) extend from the bottom region of the water receiving component (4) toward the direction away from the second opening (40) and extend to the end of the water receiving component (4).

4. The air duct assembly according to claim 3, characterized in that, The first rib (45) extends in a spiral shape.

5. The air duct assembly according to claim 3, characterized in that, The water receiving component (4) has an end wall (44) on which a collection port (43) is provided, which is directly opposite to the fan inlet (21). The first end of the first rib (45) is located in the bottom area of ​​the water receiving component (4), and the second end of the first rib (45) extends to abut against the end wall (44). The second ends of at least two first ribs (45) abut against different positions of the end wall (44) in the circumferential direction.

6. The air duct assembly according to claim 5, characterized in that, The end wall (44) is inclined toward the centrifugal fan (2) from the radial outer side to the inner side along the first direction (x).

7. The air duct assembly according to claim 1, characterized in that, The bottom of the water receiving component (4) is provided with a water collection trough (46) in the middle area along the first direction (x), and the inner sidewall around the water collection trough (46) is inclined to guide condensate into the water collection trough (46).

8. The air duct assembly according to claim 7, characterized in that, The inner wall of the water receiving component (4) is provided with a second guide portion, which is configured to guide the condensate on the inner wall of the water receiving component (4) into the water collection tank (46).

9. The air duct assembly according to claim 8, characterized in that, The second guide component includes a second rib (47), the first end of which is located near the bottom region of the water collection tank (46); The second end of the second rib (47) extends to the top position of the middle region of the water receiving component (4) along the first direction (x), or the second end of the second rib (47) extends to the top position of the end of the water receiving component (4) along the first direction (x).

10. The air duct assembly according to claim 8, characterized in that, The second guide portion is located on the inner wall of the water receiving component (4) on the side away from the second opening (40).

11. The air duct assembly according to any one of claims 1 to 10, characterized in that, The heat exchanger (3) is an outwardly convex arc-shaped plate.

12. The air duct assembly according to claim 11, characterized in that, The water receiving component (4) includes a first sidewall section (41) and a second sidewall section (42) in the circumferential direction. The radial dimension of the second sidewall section (42) is greater than the radial dimension of the first sidewall section (41). The second opening (40) is provided on the second sidewall section (42).

13. The air duct assembly according to any one of claims 1 to 10, characterized in that, The centrifugal fan (2) has its outlet (22) located in the top region. The outlet (22) discharges air in a second direction (y) away from the heat exchanger (3), and the second direction (y) is perpendicular to the first direction (x). The heat exchanger (3) includes at least two heat exchange sections arranged along a third direction (z), the dimensions of the at least two heat exchange sections gradually decreasing from top to bottom along the first direction (x), and the third direction (z) is perpendicular to the first direction (x) and the second direction (x).

14. The air duct assembly according to claim 13, characterized in that, The heat exchanger (3) is stepped on both sides along the first direction (x).

15. The air duct assembly according to any one of claims 1 to 10, characterized in that, The heat exchanger (3) includes fins, and an air inlet channel (30) is formed between the fins, the air inlet channel (30) being inclined downward relative to the normal of its location.

16. The air duct assembly according to any one of claims 1 to 10, characterized in that, The centrifugal fan (2) has its outlet (22) located in the top region, and the outlet (22) discharges air in the second direction (y) away from the heat exchanger (3); The housing (1) includes a top plate (11), on which a first air outlet (10) and a second air outlet (20) are provided. The first air outlet (10) is located in the area outside the centrifugal fan (2) along the first direction (x), and the second air outlet (20) covers the fan outlet (22) along the first direction (x). An air outlet channel is formed between the top of the water receiving component (4) and the top plate (11), and the fan outlet (22) is connected to the first air outlet (10) through the air outlet channel.

17. The air duct assembly according to any one of claims 1 to 10, characterized in that, Two centrifugal fans (2) are provided, and the two centrifugal fans (2) are respectively located at both ends of the housing (1) along the first direction (x). The water receiving component (4) is located between the two centrifugal fans (2), and the water receiving component (4) is provided with the collection port (43) at both ends along the first direction (x).

18. The air duct assembly according to any one of claims 1 to 10, characterized in that, The central axis of the centrifugal fan (25) is aligned with the first direction (x), and the heat exchanger (3) extends along the first direction (x) as a whole.

19. An indoor unit for an air conditioner, characterized in that, Includes the air duct assembly as described in any one of claims 1 to 18.

20. An air conditioning unit, characterized in that, Includes the air conditioner indoor unit as described in claim 19.

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