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, the air duct assembly comprises a shell, a reversing air duct is arranged in the shell, and the reversing air duct communicates with a first main air outlet and a second air outlet; the centrifugal fan is arranged in the shell and located at the end, in the first direction, of the shell, the centrifugal fan comprises a volute assembly, the first outlet communicates with the reversing air duct, and the area of the first outlet is smaller than that of the first main air outlet and that of the second air outlet; the first flow guide assembly is arranged in the reversing air duct, the first flow guide assembly is configured to be rotatably switched between a first position and a second position so that the air duct assembly can be switched between an upper air outlet state and a lower air outlet state, under the condition that the first flow guide assembly is located at the first position, the first outlet communicates with the first main air outlet, and under the condition that the first flow guide assembly is located at the second position, the second outlet communicates with the second main air outlet; and when the first flow guide assembly is located at the second position, the first outlet communicates with the second air outlet. According to the air duct assembly, the air outlet face can be widened.

Description

Technical Field

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

[0002] As the application scenarios of centrifugal fans expand, the requirements for the quality of air delivery are becoming increasingly stringent. Conventional centrifugal fans discharge air along the centrifugal direction of the volute, resulting in a long air delivery distance, but the air delivery area is narrow and the air velocity is concentrated, making it difficult to meet the needs of special application scenarios. Utility Model Content

[0003] The embodiments of this disclosure provide a duct assembly, an indoor air conditioning unit, and an air conditioning unit that can widen the air outlet surface of the duct assembly.

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

[0005] The shell has a first main air outlet on its top wall and a second air outlet on its bottom wall. The shell also has a reversing air duct that connects to the first main air outlet and the second air outlet.

[0006] A centrifugal fan is housed within a casing and located at the end of the casing along a first direction. The centrifugal fan includes a volute assembly, and a fan outlet is provided on the circumferential sidewall of the volute assembly. The fan outlet includes a first outlet, which communicates with a reversing air duct. The area of ​​the first outlet is smaller than that of a first main air outlet and a second air outlet.

[0007] A first airflow guiding component is disposed within a reversing air duct. The first airflow guiding component is configured to rotatably switch between a first position and a second position to switch the air duct component between an upper air outlet state and a lower air outlet state. When the first airflow guiding component is in the first position, the first outlet and the first main air outlet are connected. When the first airflow guiding component is in the second position, the first outlet and the second air outlet are connected.

[0008] In some embodiments, the two sidewalls of the reversing duct are spaced apart along a second direction, which is perpendicular to the first direction, and the first flow guide assembly is connected between the two sidewalls of the reversing duct along the second direction.

[0009] In some embodiments, the first diversion component includes:

[0010] A bracket, rotatably connected to the sidewall of the reversing duct about a first axis of rotation, the first axis of rotation extending along a second direction perpendicular to the first direction; and

[0011] The first guide plate is located at the end of the support radially away from the first axis of rotation. The first guide plate is arc-shaped and protrudes in a direction away from the first axis of rotation.

[0012] In some embodiments, the first diversion component further includes:

[0013] The second guide plate is mounted on the support. The second guide plate and the first guide plate are arranged radially apart along the support and located radially inside the first guide plate. The second guide plate is arc-shaped and protrudes in a direction away from the first axis of rotation.

[0014] In some embodiments, the support includes:

[0015] Both the first and second parts extend radially; and

[0016] The third part is arc-shaped and connects the first and second parts. The first, second and third parts together form a fan-shaped structure. The first guide plate and the second guide plate are both connected between the first and second parts.

[0017] In some embodiments, the duct assembly further includes:

[0018] A sealing assembly is provided at the end of the bracket radially away from the first axis of rotation, and the sealing assembly is located between the bracket and the sidewall of the reversing duct.

[0019] In some embodiments, the sealing assembly includes a first sealing portion and a second sealing portion. The first sealing portion is disposed on the side of the bracket away from the first guide plate, and the second sealing portion is disposed on the side wall of the reversing air duct. The first sealing portion and the second sealing portion are in a concave-convex fit.

[0020] In some embodiments,

[0021] The first sealing portion includes a first sealing edge, and the second sealing portion includes a third sealing edge. Both the first and third sealing edges are arc-shaped. In the direction in which the first flow guiding assembly rotates from the first position to the second position, the height of the third sealing edge gradually increases. The third sealing edge is configured to engage with the first sealing edge in a concave-convex fit when the first flow guiding assembly is in the second position; and / or

[0022] The first sealing part includes a second sealing edge, the second sealing part includes a fourth sealing edge, both the second sealing edge and the fourth sealing edge are arc-shaped, the second sealing edge and the first sealing edge are radially spaced apart, the fourth sealing edge and the third sealing edge are radially spaced apart, in the direction in which the first flow guiding assembly rotates from the second position to the first position, the height of the fourth sealing edge gradually increases, and the fourth sealing edge is configured to cooperate with the second sealing edge when the first flow guiding assembly is in the first position.

[0023] In some embodiments, the duct assembly further includes:

[0024] The third sealing part protrudes in an arc shape from the inner side wall of the reversing air duct, and the third sealing part is located radially outside the movement trajectory of the first guide assembly.

[0025] In some embodiments, the duct assembly further includes:

[0026] The second airflow guiding component is fixedly installed in the reversing air duct and is configured to guide the airflow from the first outlet and through the first airflow guiding component to the first main air outlet or the second air outlet.

[0027] In some embodiments, the housing is provided with an end plate at the end away from the centrifugal fan along the first direction, and the second flow guiding assembly includes a third flow guiding plate and a fourth flow guiding plate. The first ends of each are respectively connected to the region of the end plate near the top wall and the region of the end plate near the bottom wall, and the second ends of each form a connecting end in the middle region of the reversing air duct along the third direction. The third direction is perpendicular to the first direction. The third flow guiding plate and the fourth flow guiding plate are inclined, and the second ends of each are closer to the centrifugal fan in the first direction than the first ends.

[0028] In some embodiments, the first flow guiding assembly is rotatable about a first rotation axis. The first flow guiding assembly includes a first flow guiding plate, which is arc-shaped and protrudes in a direction away from the first rotation axis. A first limiting member is provided in the region of the reversing air duct near the top wall. The first limiting member is configured to limit the first flow guiding plate to limit the first flow guiding assembly to a second position. A second limiting member is provided in the region of the reversing air duct near the bottom wall. The second limiting member is configured to limit the first flow guiding plate to limit the second flow guiding assembly to a first position.

[0029] In some embodiments, the first guide plate is provided with a first limiting portion and a second limiting portion at both ends along the circumferential direction. Both the first limiting portion and the second limiting portion are bent in a direction away from the first rotation axis. When the first guide assembly is in the second position, the first limiting portion overlaps with the first limiting member and the second limiting portion overlaps with the connecting end. When the first guide assembly is in the first position, the first limiting portion overlaps with the connecting end and the second limiting portion overlaps with the second limiting member.

[0030] In some embodiments, the duct assembly further includes:

[0031] The third sealing part protrudes in an arc shape from the inner side wall of the reversing air duct, and the third sealing part is sequentially connected to the first limiting member, the connecting end, and the second limiting member.

[0032] In some embodiments, the top wall is provided with a first secondary air outlet, which is configured to open when the air duct assembly is in an upward air outlet state and to close when the air duct assembly is in a downward air outlet state. The fan outlet also includes a second outlet, which is connected to the first secondary air outlet and the reversing air duct. The centrifugal fan also includes a third flow guiding component, which is located between the first outlet and the second outlet along a third direction. The third flow guiding component is configured to separate the upstream airflow and the downstream airflow in the centrifugal fan, and the third direction is perpendicular to the first direction.

[0033] In some embodiments, the centrifugal fan further includes centrifugal impellers, and the third flow guiding assembly includes a fifth flow guide plate and a sixth flow guide plate. The fifth flow guide plate and the centrifugal impellers are coaxially arranged along the airflow direction. The sixth flow guide plate is connected downstream of the fifth flow guide plate, and the end of the sixth flow guide plate away from the fifth flow guide plate is inclined toward the direction close to the top wall.

[0034] In some embodiments, two centrifugal fans are provided, and the two centrifugal fans are respectively located at both ends of the housing along the first direction.

[0035] In some embodiments, the top wall is provided with two independent first main air outlets along the first direction, and the bottom wall is provided with two independent second air outlets along the first direction. Each centrifugal fan is provided with a corresponding first flow guiding component, and the first outlet of each centrifugal fan can be selectively connected to the first main air outlet or the second air outlet on the same side.

[0036] In some embodiments, the air duct assembly further includes two second flow guiding components, which are fixedly disposed in the middle region of the reversing air duct along the first direction, and the two second flow guiding components are symmetrical with respect to the plane perpendicular to the first direction. The second flow guiding components are configured to guide the airflow of the first outlet to the first main air outlet or the second air outlet. Each centrifugal fan is provided with a first flow guiding component between itself and the second flow guiding component on the same side.

[0037] In some embodiments, the angle between the axial inner side of each centrifugal fan and the side wall of the reversing duct connected to the axial inner side is a first preset angle, which is an obtuse angle.

[0038] In some embodiments, the first preset included angle ranges from 110° to 120°.

[0039] In some embodiments, each centrifugal fan has a fan inlet on its axial inner side, and the duct assembly further includes:

[0040] The heat exchanger assembly is disposed between the two centrifugal fans along the first direction, with the windward side of the heat exchanger assembly facing away from the reversing air duct.

[0041] In some embodiments, the heat exchanger assembly includes two heat exchange plates, each with a first end close to the ends of the two centrifugal fans away from the reversing duct, and a second end forming a connection end in the middle region along a first direction. Both heat exchange plates are inclined, and their second ends are closer to the reversing duct in a second direction than their first ends, with the second direction perpendicular to the first direction.

[0042] In some embodiments, the two centrifugal fans and the two heat exchange plates are symmetrically arranged with respect to the plane perpendicular to the first direction. The acute angle between the heat exchange plate and the axial outer side of the centrifugal fan on the same side is a second preset angle, and the value of the second preset angle ranges from 10° to 20°.

[0043] According to a second aspect of this disclosure, an indoor air conditioning unit is provided, comprising:

[0044] The casing, including the front panel; and

[0045] In the above embodiment, the air duct assembly is located inside the casing and the reversing air duct is close to the front panel. The indoor unit of the air conditioner is configured to use an upper air outlet state in the cooling mode and a lower air outlet state in the heating mode.

[0046] In some embodiments, the housing further includes a top plate and a bottom plate. The top plate has a first opening and a second opening, with the first opening being closer to the front plate than the second opening. The bottom plate has a third opening and a fourth opening, with the third opening being closer to the front plate than the fourth opening. The second and fourth openings are used for air intake, and the first and third openings are used for air exhaust.

[0047] According to a third aspect of this disclosure, an air conditioning unit is proposed, including the air duct assembly of the above embodiments, or including the air conditioning indoor unit of the above embodiments.

[0048] Based on the above technical solution, in the air duct assembly of this embodiment, the area of ​​the first outlet is smaller than that of the first main air outlet and the second air outlet, so that the airflow from the first outlet to the upper and lower air outlets is a gradually expanding flow channel, which can widen the air supply surface, balance the air supply, and improve the air supply quality to meet various application scenarios; by setting air outlets on the top and bottom walls, the height difference of the reversing air duct can be fully utilized to arrange a longer gradually expanding flow channel, so that the air supply surface can be smoothly and gradually widened, increasing the stability of the airflow in the reversing air duct; the air duct assembly uses a centrifugal fan and cooperates with the position switching of the first flow guiding component to achieve upward or downward air supply. Compared with fixed air supply, the air supply direction can be changed according to actual needs, improving the user experience. Attached Figure Description

[0049] 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:

[0050] Figure 1 This is a structural schematic diagram of some embodiments of the air duct assembly of this disclosure in the upward air outlet state.

[0051] Figure 2 This is a structural schematic diagram of some embodiments of the housing of the air duct assembly disclosed herein.

[0052] Figure 3 This is a schematic diagram of the external structure of some embodiments of the air duct assembly disclosed herein.

[0053] Figure 4This is a structural schematic diagram of some embodiments of the air duct assembly of this disclosure in the downward air outlet state.

[0054] Figure 5 This is a structural schematic diagram of some embodiments of the volute assembly of the air duct assembly of this disclosure.

[0055] Figure 6 This is a schematic diagram of the structure of some embodiments of the reversing air duct of the air duct assembly of this disclosure.

[0056] Figure 7 This is a schematic diagram of the structure of some embodiments of the first airflow guiding component of the air duct assembly of this disclosure.

[0057] Figure 8 This is a top sectional view of some embodiments of the air duct assembly disclosed herein.

[0058] Figure 9 for Figure 8 An enlarged schematic diagram of region A in the middle.

[0059] Figure 10 This is a schematic diagram of the airflow direction in the upper air outlet state of the air duct assembly of this disclosure.

[0060] Figure 11 This is a schematic diagram of the airflow direction in the downward air outlet state of the air duct assembly of this disclosure.

[0061] Figure 12 This is a first-view structural schematic diagram of some other embodiments of the air duct assembly disclosed herein.

[0062] Figure 13 This is a second-view structural schematic diagram of some other embodiments of the air duct assembly disclosed herein.

[0063] Figure 14 This is a top sectional view of some other embodiments of the air duct assembly disclosed herein.

[0064] Figure 15 This is a top view of some embodiments of the air duct assembly disclosed herein.

[0065] Figure 16 This is a schematic diagram showing other angle settings for the air duct assembly disclosed herein.

[0066] Figure 17 This is a first-view structural schematic diagram of some embodiments of the indoor unit of the air conditioner disclosed herein.

[0067] Figure 18 This is a second-view structural schematic diagram of some embodiments of the indoor unit of the air conditioner disclosed herein.

[0068] Explanation of reference numerals in the attached figures

[0069] 1. Shell; 2. Centrifugal fan; 3. First air guide assembly; 4. Sealing assembly; 5. Second air guide assembly; 6. Heat exchanger assembly; 10. First main air outlet; 20. Second air outlet; 30. First auxiliary air outlet; 200. Fan outlet; 201. First outlet; 202. Second outlet; 220. Fan inlet; 11. Top wall; 12. Bottom wall; 13. Reversing air duct; 130. Side wall; 131. First limiting component; 132. Second limiting component; 14. End plate; 21. Volute assembly; 22. Centrifugal fan blade; 23. Third air guide assembly; 235. Fifth air guide plate; 236. Sixth air guide plate; 24. Axial inner side; 25. Axial outer side; 31. First air guide plate; 311. First limiting part; 312. Second limiting part; 32. Second guide plate; 33. Support; 331. First part; 332. Second part; 333. Third part; 41. First sealing part; 411. First sealing edge; 412. Second sealing edge; 42. Second sealing part; 423. Third sealing edge; 424. Fourth sealing edge; 43. Third sealing part; 53. Third guide plate; 54. Fourth guide plate; 60. Heat exchange plate; 100. Housing; 110. Front plate; 120. Top plate; 140. Bottom plate; 121. First opening; 122. Second opening; 143. Third opening; 144. Fourth opening; x, first direction; y, second direction; z, third direction. Detailed Implementation

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] First, this disclosure proposes an air duct component, such as Figures 1 to 16 As shown, it includes:

[0077] The housing 1 has a first main air outlet 10 on its top wall 11 and a second air outlet 20 on its bottom wall 12. The housing 1 has a reversing air duct 13 inside, which is connected to the first main air outlet 10 and the second air outlet 20.

[0078] Centrifugal fan 2 is disposed inside housing 1 and located at the end of housing 1 along the first direction x. Centrifugal fan 2 includes a volute assembly 21. A fan outlet 200 is provided on the circumferential sidewall of the volute assembly 21. The fan outlet 200 includes a first outlet 201, which is connected to the reversing air duct 13. The area of ​​the first outlet 201 is smaller than that of the first main air outlet 10 and the second air outlet 20.

[0079] The first airflow guiding component 3 is disposed in the reversing air duct 13. The first airflow guiding component 3 is configured to rotatably switch between a first position and a second position so that the air duct component switches between an upper air outlet state and a lower air outlet state. When the first airflow guiding component 3 is in the first position, the first outlet 201 and the first main air outlet 10 are connected. When the first airflow guiding component 3 is in the second position, the first outlet 201 and the second air outlet 20 are connected.

[0080] Specifically, the housing 1 includes a top wall 11 and a bottom wall 12 spaced apart along a third direction z (such as the height direction). The top wall 11 is provided with one or more first main air outlets 10, and the bottom wall 12 is provided with one or more second air outlets 20. The area of ​​the first outlet 201 is smaller than that of the first main air outlet 10 and the second air outlet 20, that is, the flow from the first outlet 201 to the first main air outlet 10 or the second air outlet 20 is a gradually expanding flow channel, which can widen the air supply surface.

[0081] Specifically, the centrifugal fan 2 includes a volute assembly 21 and centrifugal impellers 22. The volute assembly includes a volute and a volute tongue. From upstream to downstream, a gradually expanding flow channel is formed between the volute and the centrifugal impellers 22. The bottom end of the volute tongue is connected to the bottom wall 12, and the top end of the volute tongue extends towards the top wall 11. A fan outlet 200 is formed between the volute and the volute tongue. The fan outlet 200 includes a first outlet 201 that communicates with the reversing air duct 13. The arrangement direction of the centrifugal impellers 22 is such that the air duct assembly discharges air in the direction of the impellers in the upward air outlet state and in the direction of the impellers in the downward air outlet state.

[0082] Specifically, the first airflow guiding component 3 rotates to change its position, thereby smoothly guiding the airflow channel between the first outlet 201 and the first main air outlet 10 or the second air outlet 20. In the case where the fan outlet 200 in the following embodiment includes a second outlet 202, the first airflow guiding component 3 can also smoothly guide the airflow channel between the second outlet 202 and the second air outlet 20 in the downward airflow state. The rotation axis of the first airflow guiding component 3 can extend along the second direction y, which is perpendicular to the first direction x.

[0083] Optionally, the volute and the housing 1 can be set separately or as a single unit. The first flow guide assembly 3 can have only one flow guide plate along its rotational radial direction, or it can have two or more flow guide plates spaced apart.

[0084] Optionally, in the projection plane perpendicular to the third direction z, the turning angle between the air outlet direction of the first outlet 201 and the air inlet direction of the reversing duct 13 is an acute angle, for example, 60° to 70°, and the third direction z is perpendicular to the first direction x. An acute turning angle can significantly reduce airflow energy loss compared to a right angle or an obtuse angle.

[0085] In this embodiment, the area of ​​the first outlet 201 of the duct assembly is smaller than that of the first main air outlet 10 and the second air outlet 20, so that the airflow from the first outlet 201 to the upper and lower air outlets is a gradually expanding flow channel, which can widen the air supply surface, balance the air supply, and improve the air supply quality. By setting air outlets on the top wall 11 and the bottom wall 12, the height difference of the reversing duct can be fully utilized to arrange a longer gradually expanding flow channel, so that the air supply surface can be smoothly and gradually widened, increasing the stability of the airflow in the reversing duct. The duct assembly uses a centrifugal fan 2 and cooperates with the first flow guide component 3 to switch the position to achieve upward or downward air supply. Compared with fixed air supply, the air supply direction can be changed according to actual needs, improving the user experience.

[0086] In some embodiments, such as Figures 1 to 14 As shown, the two side walls 130 of the reversing air duct 13 are spaced apart along the second direction y, which is perpendicular to the first direction x. The first flow guiding component 3 is connected between the two side walls 130 of the reversing air duct 13 along the second direction y.

[0087] Optionally, both sidewalls 130 of the reversing duct 13 are perpendicular to the second direction y. Optionally, the dimensions of the first flow guide assembly 3 along the second direction y are similar to the dimensions of the reversing duct 13 along the second direction y.

[0088] In this embodiment, the first flow guiding component 3 is connected between the two side walls 130 of the reversing air duct 13 along the second direction y, which enables the first flow guiding component 3 to form a sealed guiding surface along the second direction y, guiding all the gas entering the reversing air duct 13 to the air outlet, thereby improving the air delivery efficiency of the air duct component.

[0089] In some embodiments, such as Figures 1 to 7 As shown, the first flow guiding component 3 includes:

[0090] The bracket 33 is rotatably connected to the side wall 130 of the reversing duct 13 about a first rotation axis, the first rotation axis extending along a second direction y, the second direction y being perpendicular to the first direction x; and

[0091] The first guide plate 31 is located at the end of the support 33 that is radially away from the first rotation axis. The first guide plate 31 is arc-shaped and protrudes in a direction away from the first rotation axis.

[0092] Specifically, the first guide plate 31 is disposed on the side of the bracket 33 opposite to the side wall 130. The guide surface formed by the first guide plate 31 is used to guide the airflow from the first outlet 201 to the first main air outlet 10, or to guide the airflow from the fan outlet 200 to the second air outlet 20. The bracket 33 switches between the first position and the second position, so that the first guide assembly 3 as a whole switches between the first position and the second position.

[0093] Optionally, the guiding surface of the first guide plate 31 can coincide with the outermost motion trajectory circle of the support 33 in the circumferential direction, that is, the guiding surface is an arc with the center of the circle falling on the first rotation axis; the guiding surface of the first guide plate 31 can also coincide with the motion trajectory circle only at both ends in the circumferential direction, with the main body located inside the motion trajectory circle, in order to provide a better guiding angle. For example, the first guide plate 31 can have a certain thickness, the radial inner side of the first guide plate 31 is used to guide the airflow to change direction, and the radial outer side of the first guide plate 31 is used to assist in guiding the rotation and sealing of the support 33.

[0094] Optionally, the bracket 33 is provided with a rotating shaft that can rotate around a first rotation axis. The rotating shaft can completely penetrate the side wall 130 or partially penetrate a blind hole in the side wall 130. The rotating shaft can be provided on only one side wall 130 or on both side walls 130 simultaneously to improve the rotational stability of the bracket 33. Optionally, a semi-circular groove surface, such as a sliding groove, can be provided on the side wall 130 to guide the rotation of the bracket. Optionally, the bracket 33 can be any structural form that can realize rotational switching, such as a solid or hollow fan-shaped plate, a tubular or plate-shaped bracket, etc.

[0095] In this embodiment, the first guide plate 31 switches the guide position by rotating the bracket 33, so that the airflow can be discharged up and down in the reversing air duct 13. This can guide the airflow to be discharged evenly and achieve balanced airflow, thereby improving the air supply quality and efficiency of the air duct assembly.

[0096] In some embodiments, such as Figures 1 to 7 As shown, the first flow guiding component 3 also includes:

[0097] The second guide plate 32 is disposed on the bracket 33. The second guide plate 32 and the first guide plate 31 are arranged radially apart along the bracket 33 and are located radially inside the first guide plate 31. The second guide plate 32 is arc-shaped and protrudes in a direction away from the first rotation axis.

[0098] Specifically, the second guide plate 32 can divide the airflow entering the reversing duct 13 into two streams along the radial direction of the support 33. The first guide plate 31 acts as the main guide plate to guide the main airflow out, and the second guide plate 32 acts as the auxiliary guide plate to guide the branch airflow out.

[0099] Specifically, the dual-channel dual-guide surface formed by the first guide plate 31 and the second guide plate 32 is used to guide the airflow from the first outlet 201 to the first main air outlet 10, or to guide the airflow from the fan outlet 200 to the second air outlet 20.

[0100] Optionally, the guiding surface of the second guide plate 32 can be an arc shape with its center falling on the first rotation axis. Optionally, the guiding surfaces of the first guide plate 31 and the second guide plate 32 can both be concentric arcs.

[0101] In this embodiment, the first guide plate 31 and the second guide plate 32 work together to form a dual-channel guide. The second guide plate 32 assists in guiding the airflow near the turning center, which can improve the uniformity of the airflow after the reversal, achieve balanced airflow, and improve the air delivery quality and efficiency of the air duct assembly.

[0102] In some embodiments, the support 33 includes:

[0103] Part 331 and Part 332 both extend radially; and

[0104] The third part 333 is arc-shaped and connected between the first part 331 and the second part 332. The first part 331, the second part 332 and the third part 333 form a fan-shaped structure. The first guide plate 31 and the second guide plate 32 are both connected between the first part 331 and the second part 332.

[0105] Specifically, the first guide plate 31 is located in the area of ​​the bracket 33 near the circumference to make full use of the space of the reversing air duct 13, give full play to the main flow function of the first guide plate 31, and increase the air volume of the air duct assembly.

[0106] Optionally, the first guide vane 31 can be integrally mounted on the third part 333 to improve the reliability of the first guide vane 31. Optionally, the first part 331, the second part 332, and the third part 333 can all be plate-shaped structures or other suitable shapes.

[0107] In this embodiment, the first part 331, the second part 332, and the third part 333 of the bracket 33 form a fan-shaped structure, which can not only enable the bracket 33 to rotate and switch between the first position and the second position, but also improve the stability of the first guide plate 31 and the second guide plate 32 set on it by utilizing the stability of the fan shape, thereby improving the reliability of the moving parts in the air duct assembly.

[0108] In some embodiments, such as Figures 1 to 14 As shown, the air duct assembly also includes:

[0109] The sealing assembly 4 is located at the end of the bracket 33 that is radially away from the first rotation axis, and the sealing assembly 4 is located between the bracket 33 and the side wall 130 of the reversing air duct 13.

[0110] Specifically, the first flow guiding component 3 rotates within the reversing air duct 13. Due to the presence of moving parts, internal gaps are easily generated. Air leakage from these gaps can easily cause airflow loss and abnormal noise. By setting a sealing component 4 between the bracket 33 and the side wall 130, the above problems can be solved.

[0111] Optionally, the sealing component 4 can be provided only on one side of the reversing duct 13 along the second direction y, or it can be provided on both sides of the reversing duct 13 along the second direction y to improve the sealing effect.

[0112] In this embodiment, the sealing component 4 is located at the end of the bracket 33 that is radially away from the first rotation axis. This not only avoids affecting the rotation of the bracket 33 but also achieves a reliable seal. The sealing component 4 can prevent airflow leakage in the reversing duct 13, avoid causing airflow loss and abnormal noise, and improve the air supply reliability of the duct assembly.

[0113] In some embodiments, such as Figure 2 and Figure 7 As shown, the sealing assembly 4 includes a first sealing part 41 and a second sealing part 42. The first sealing part 41 is located on the side of the bracket 33 away from the first guide plate 31, and the second sealing part 42 is located on the side wall 130 of the reversing air duct 13. The first sealing part 41 and the second sealing part 42 are in a concave-convex fit.

[0114] Specifically, the first sealing part 41 is provided on the side of the third part 333 of the bracket 33 facing away from the first guide plate 31. Optionally, the first sealing part 41 may be provided on only one side wall 130 of the reversing air duct 13, or it may be provided on both side walls 130 of the reversing air duct 13. Correspondingly, the second sealing part 42 may also be provided on one or both sides of the bracket 33 facing away from the first guide plate 31 along the second direction y.

[0115] In this embodiment, the first sealing part 41 is provided on the bracket 33 and the second sealing part 42 is provided on the side wall 130. This can both avoid affecting the rotation of the bracket 33 and achieve reliable sealing. The first sealing part 41 and the second sealing part 42 are in concave-convex cooperation, which can prevent airflow leakage in the reversing air duct 13, avoid air volume loss and abnormal noise, and improve the air supply reliability of the air duct assembly.

[0116] In some embodiments, such as Figure 2 and Figure 7 As shown,

[0117] The first sealing portion 41 includes a first sealing edge 411, and the second sealing portion 42 includes a third sealing edge 423. Both the first sealing edge 411 and the third sealing edge 423 are arc-shaped. In the direction in which the first flow guiding assembly 3 rotates from the first position to the second position, the height of the third sealing edge 423 gradually increases. The third sealing edge 423 is configured to engage with the first sealing edge 411 in a concave-convex fit when the first flow guiding assembly 3 is in the second position; and / or

[0118] The first sealing part 41 includes a second sealing edge 412, and the second sealing part 42 includes a fourth sealing edge 424. Both the second sealing edge 412 and the fourth sealing edge 424 are arc-shaped. The second sealing edge 412 and the first sealing edge 411 are arranged radially spaced apart, and the fourth sealing edge 424 and the third sealing edge 423 are arranged radially spaced apart. In the direction in which the first flow guiding assembly 3 rotates from the second position to the first position, the height of the fourth sealing edge 424 gradually increases. The fourth sealing edge 424 is configured to cooperate with the second sealing edge 412 when the first flow guiding assembly 3 is in the first position.

[0119] Specifically, the first sealing edge 411 and the second sealing edge 412 are both located on the side wall 130, and the third sealing edge 423 and the fourth sealing edge 424 are both located on the bracket 33. More specifically, the third sealing edge 423 and the fourth sealing edge 424 are both located on the third part 333 of the bracket 33.

[0120] Specifically, the first sealing edge 411 is used to engage with the third sealing edge 423 in the second position, and the second sealing edge 412 is used to engage with the fourth sealing edge 424 in the first position. The first sealing edge 411 and the third sealing edge 423 engage in a face seal to form an end face seal, and the second sealing edge 412 and the fourth sealing edge 424 engage in a face seal to form an end face seal.

[0121] Specifically, the first sealing edge 411, the second sealing edge 412, the third sealing edge 423, and the fourth sealing edge 424 all extend circumferentially, for example, they all extend in a circular direction. Optionally, the first sealing edge 411, the second sealing edge 412, the third sealing edge 423, and the fourth sealing edge 424 all include a sloped surface, which can be an arc surface or a straight surface.

[0122] In this embodiment, the first sealing edge 411 and the third sealing edge 423 are in a concave-convex fit, and the second sealing edge 412 and the fourth sealing edge 424 are in a concave-convex fit. The sealing edges are set as sloping surfaces in height, which will not hinder the rotation of the bracket 33, but can form an effective seal, thereby improving the air supply reliability of the air duct assembly.

[0123] In some embodiments, such as Figure 2 and Figure 9 As shown, the air duct assembly also includes:

[0124] The third sealing part 43 protrudes in an arc shape from the inner side of the side wall 130 of the reversing air duct 13, and the third sealing part 43 is located radially outside the movement trajectory of the first guide assembly.

[0125] Specifically, the third sealing part 43 protrudes from the side wall 130 along the second direction y, and the height of the third sealing part 43 along the second direction y is greater than the distance between the bottom surface of the bracket 33 and the side wall 130.

[0126] Optionally, the third sealing part 43 can be a semi-circular limiting rib, which can both guide the rotation of the bracket 33 and protrude to form a stepped surface to block the airflow from flowing to the sealed side.

[0127] In this embodiment, the third sealing part 43 protrudes from the inner side of the side wall 130 of the reversing air duct 13 along the second direction y, and can cooperate with the sealing component 4 to form multiple effective seals, thereby improving the air supply reliability of the air duct component.

[0128] In some embodiments, such as Figures 1 to 14 As shown, the air duct assembly also includes:

[0129] The second airflow guiding component 5 is fixedly installed in the reversing air duct 13 and is configured to guide the airflow from the first outlet 201 and through the first airflow guiding component 3 to the first main air outlet 10 or the second air outlet 20.

[0130] Specifically, the second flow guiding assembly 5 is located on the side of the reversing duct 13 away from the centrifugal fan 2 along the first direction x, and the second flow guiding assembly 5 is connected between the two side walls 130 of the reversing duct 13 along the second direction y. The second flow guiding assembly 5 may include a guide plate for guiding airflow.

[0131] This embodiment uses a fixed second flow guide component 5 and a movable first flow guide component 3. The connection between the dynamic arc-shaped flow guide plate and the static flow guide plate can reduce the airflow loss and flexibly change the airflow direction to achieve the upper and lower airflow states of the air duct component. The second flow guide component 5 is connected between the two side walls 130 of the reversing air duct 13 along the second direction y, which can make the second flow guide component 5 form a sealed guide surface along the second direction y, guiding all the gas guided by the first flow guide component 3 to the air outlet, thereby improving the air delivery efficiency of the air duct component.

[0132] In some embodiments, such as Figures 1 to 14 As shown, the housing 1 has an end plate 14 at the end away from the centrifugal fan 2 along the first direction x. The second flow guiding assembly 5 includes a third flow guiding plate 53 and a fourth flow guiding plate 54. The first ends of each are respectively connected to the area of ​​the end plate 14 near the top wall 11 and the area of ​​the end plate 14 near the bottom wall 12. The second ends of each form a connection end in the middle area of ​​the reversing air duct 13 along the third direction z. The third direction z is perpendicular to the first direction x. The third flow guiding plate 53 and the fourth flow guiding plate 54 are inclined, and their second ends are closer to the centrifugal fan 2 in the first direction x than their first ends.

[0133] Specifically, both the third guide plate 53 and the fourth guide plate 54 are straight plates. The arc-shaped first guide plate 31 of the first guide assembly 3 connects with the third guide plate 53 or the fourth guide plate 54, which can reduce airflow loss and flexibly realize airflow reversal. The end plate 14 is connected between the first ends of the third guide plate 53 and the fourth guide plate 54, and the end plate 14 extends along the third direction z. The second guide assembly 5 forms a triangular structure, which has better structural strength.

[0134] In this embodiment, a second airflow guiding assembly 5 is formed by a third guide plate 53 and a fourth guide plate 54. In the upward airflow state, the airflow can be guided by the third guide plate 53, and the tilt direction of the third guide plate 53 allows the airflow from the first outlet 201 to smoothly reach the first main air outlet 10, reducing airflow resistance. In the downward airflow state, the airflow can be guided by the fourth guide plate 54, and the tilt direction of the fourth guide plate 54 allows the airflow from the first outlet 201 to smoothly reach the second air outlet 20, reducing airflow resistance. The second ends of the third guide plate 53 and the fourth guide plate 54 form a connection end in the middle region of the reversing air duct 13 along the third direction z, so that the guiding effect of the second airflow guiding assembly 5 on the airflow is symmetrical in the upward and downward airflow states.

[0135] In some embodiments, such as Figures 1 to 6 As shown, the first flow guiding component 3 is rotatable about the first rotation axis. The first flow guiding component 3 includes a first flow guiding plate 31, which is arc-shaped and protrudes in a direction away from the first rotation axis. The reversing air duct 13 is provided with a first limiting member 131 in the area near the top wall 11. The first limiting member 131 is configured to limit the first flow guiding plate 31 to limit the first flow guiding component 3 to a second position. The reversing air duct 13 is provided with a second limiting member 132 in the area near the bottom wall 12. The second limiting member 132 is configured to limit the first flow guiding plate 31 to limit the first flow guiding component 3 to a first position.

[0136] Specifically, the first main air outlet 10 is located between the end plate 14 and the first limiting member 131 along the first direction x, and the second air outlet 20 is located between the end plate 14 and the second limiting member 132 along the first direction x.

[0137] This embodiment limits the first flow guiding component 3 to the second position by the first limiting member 131 and to the first position by the second limiting member 132, thereby achieving reliable limiting of the first flow guiding component 3 and improving the air outlet stability and reliability of the air duct component.

[0138] In some embodiments, such as Figure 6 and Figure 7As shown, the first guide plate 31 has a first limiting part 311 and a second limiting part 312 at both ends along the circumferential direction. Both the first limiting part 311 and the second limiting part 312 are bent in a direction away from the first rotation axis. When the first guide assembly 3 is in the second position, the first limiting part 311 overlaps with the first limiting member 131, and the second limiting part 312 overlaps with the connecting end. When the first guide assembly 3 is in the first position, the first limiting part 311 overlaps with the connecting end, and the second limiting part 312 overlaps with the second limiting member 132.

[0139] This embodiment, through the cooperation of the first limiting part 311 and the second limiting part 312 with the first limiting member 131, the connecting end and the second limiting member 132, can firmly limit the first flow guiding component 3 to the first position or the second position, thereby achieving reliable limiting of the first flow guiding component 3 and improving the air outlet stability and reliability of the air duct component; at the same time, the bent portions of the first limiting part 311 and the second limiting part 312, in addition to the limiting function, can further increase the air tightness and achieve the reversing and balanced air outlet of the air duct component.

[0140] In some embodiments, such as Figure 2 and Figure 9 As shown, the air duct assembly also includes:

[0141] The third sealing part 43 protrudes in an arc shape from the inner side of the side wall 130 of the reversing air duct 13, and the third sealing part 43 is sequentially connected to the first limiting member 131, the connecting end and the second limiting member 132.

[0142] In this embodiment, the third sealing part 43 is sequentially connected to the first limiting member 131, the connecting end, and the second limiting member 132, which has high sealing reliability and can cooperate with the sealing assembly 4 to form multiple effective seals, thereby improving the air supply reliability of the air duct assembly.

[0143] In some embodiments, such as Figures 1 to 10 As shown, the top wall 11 is provided with a first secondary air outlet 30. The first secondary air outlet 30 is configured to open when the air duct assembly is in the upward air outlet state and to close when the air duct assembly is in the downward air outlet state. The fan outlet 200 also includes a second outlet 202, which is connected to the first secondary air outlet 30 and the reversing air duct 13. The centrifugal fan 2 also includes a third flow guiding component 23, which is located between the first outlet 201 and the second outlet 202 along a third direction z. The third flow guiding component 23 is configured to separate the upstream airflow and the downstream airflow in the centrifugal fan 2. The third direction z is perpendicular to the first direction x.

[0144] Specifically, the second outlet 202 is located on the side of the third flow guide assembly 23 near the top wall 11, and the first outlet 201 is located on the side of the third flow guide assembly 23 near the volute tongue. The third flow guide assembly 23 is connected between the two sides of the volute along the axial direction. Optionally, the third flow guide assembly 23 may include one or more sections.

[0145] Since the air intake and operating area of ​​the centrifugal fan blade 22 are fixed, airflow turbulence easily forms at the fan outlet 200 regardless of whether it is in the upward or downward airflow state. That is, the upstream airflow impacts the downstream airflow, resulting in a surging sound. The third guide component 23, as an auxiliary diffuser, can separate the upstream and downstream airflows, suppress the influence of the upstream airflow on the downstream airflow, and improve the air delivery quality. In the upward airflow state, the gas flowing out from the second outlet 202 flows directly out from the first auxiliary outlet 30, which can widen the airflow surface; in the downward airflow state, the airflow from the second outlet 202 is guided by the first guide component 3 and then flows out through the second outlet 20.

[0146] This embodiment, by setting a third flow guiding component 23 inside the volute, can separate the upstream airflow and the downstream airflow at the fan outlet 200, suppress the influence of the upstream airflow on the downstream airflow, stabilize the gas flow, and improve the air delivery quality; by cooperating with the first main air outlet 10 and the first secondary air outlet 30, the air outlet surface of the air duct component can also be further widened.

[0147] In some embodiments, such as Figure 4 and Figure 5 As shown, the centrifugal fan 2 also includes a centrifugal fan blade 22, and the third flow guiding assembly 23 includes a fifth flow guiding plate 235 and a sixth flow guiding plate 236. The fifth flow guiding plate 235 and the centrifugal fan blade 22 are coaxially arranged. Along the airflow direction, the sixth flow guiding plate 236 is connected downstream of the fifth flow guiding plate 235, and the end of the sixth flow guiding plate 236 away from the fifth flow guiding plate 235 is inclined towards the direction close to the top wall 11.

[0148] Optionally, both the fifth deflector 235 and the sixth deflector 236 can be straight plates or curved plates.

[0149] In this embodiment, the fifth guide plate 235 is a dividing section, and the sixth guide plate 236 is a gradually expanding section along the rotation direction. The fifth guide plate 235 and the sixth guide plate 236 work together to divide the upstream airflow and the downstream airflow into two channels for discharge along the gas flow direction, which can enhance the uniformity of the centrifugal fan's air outlet, improve the air supply quality, and widen the air outlet surface of the air duct assembly.

[0150] Specifically, such as Figure 10As shown, in the upward air outlet state, the first flow guide component 3 is in the first position. The first flow guide component 3 limits the flow direction of the first part of the gas flowing out from the first outlet 201 of the centrifugal fan 2, so that the airflow is generally upward and flows out under the action of the second flow guide component 5 near the first main air outlet 10. When the first flow guide component 3 includes the first guide plate 31 and the second guide plate 32, the first part of the gas is further divided into the first airflow and the second airflow. The third flow guide component 23 limits the flow direction of the second part of the gas flowing out from the second outlet 202 of the centrifugal fan 2, so that the airflow flows directly out through the first auxiliary air outlet 30 to form the third airflow. The airflow direction is shown by the arrow.

[0151] like Figure 11 As shown, in the downward air outlet state, the first flow guide component 3 is in the first position. The first flow guide component 3 limits the flow direction of the gas flowing out from the first outlet 201 and the second outlet 202 of the centrifugal fan 2, so that the airflow is downward and flows out under the action of the second flow guide component 5 near the second air outlet 20. When the first flow guide component 3 includes the first guide plate 31 and the second guide plate 32, the overall airflow is divided into the first airflow and the second airflow, and the airflow direction is shown by the arrow.

[0152] like Figure 2 and Figure 15 As shown, when the duct assembly is used in an indoor air conditioning unit, the duct assembly also includes a heat exchanger assembly 6. The first end of the heat exchanger assembly 6 is located near the end plate 14 of the reversing duct 13, and the second end of the heat exchanger assembly 6 is located near the rear end of the centrifugal fan 2. The rear end of the centrifugal fan 2 is the end of the centrifugal fan 2 furthest from the reversing duct 13. The heat exchanger assembly 6 exchanges heat with the return air entering the fan inlet 220.

[0153] In some embodiments, such as Figures 12 to 14 As shown, two centrifugal fans 2 are provided, located at opposite ends of the housing 1 along the first direction x. Specifically, the centrifugal fan blades 22 of the centrifugal fans 2 are connected to the drive mechanism. Optionally, the drive mechanism may include a power component, a reducer, etc.

[0154] This embodiment, by setting two centrifugal fans 2 at both ends of the housing 1, can generate greater driving force for the return airflow, allowing the airflow to pass more smoothly through the heat exchanger assembly 6, thereby improving heat exchange efficiency and increasing the air outlet rate. By setting centrifugal fans 2 at both ends along the first direction x, airflow can be introduced into both sides of the reversing duct 13 along the first direction x, so that the air is delivered evenly on both sides. This facilitates setting a larger air outlet on the housing 1 along the first direction x, thereby improving the air outlet efficiency.

[0155] In some embodiments, such as Figures 12 to 14As shown, the top wall 11 is provided with two independent first main air outlets 10 along the first direction x, and the bottom wall 12 is provided with two independent second air outlets 20 along the first direction x. Each centrifugal fan 2 is provided with a corresponding first flow guiding component 3. The first outlet 201 of each centrifugal fan 2 can be selectively connected to the first main air outlet 10 or the second air outlet 20 on the same side.

[0156] In this embodiment, a first airflow guiding component 3 is provided for each centrifugal fan 2, which allows the airflow discharged from the first outlet 201 of each centrifugal fan 2 to be controlled independently and discharged from the first main air outlet 10 or the second air outlet 20 corresponding to the centrifugal fan 2. This can improve the uniformity of the airflow and ensure the basic airflow function of the duct assembly even if one centrifugal fan 2 or its corresponding first airflow guiding component 3 fails.

[0157] In some embodiments, such as Figures 12 to 14 As shown, each centrifugal fan 2 includes a third flow guide assembly 23, which is located between the first outlet 201 and the second outlet 202 along a third direction z. The third flow guide assembly 23 is configured to separate the upstream airflow and the downstream airflow within the centrifugal fan 2. In the upward airflow state, the airflow from the second outlet 202 flows out through the first auxiliary air outlet 30. In the downward airflow state, the airflow from the second outlet 202 is guided by the first flow guide assembly 3 and then flows out through the second air outlet 20.

[0158] In some embodiments, such as Figures 12 to 14 As shown, the air duct assembly also includes two second flow guiding components 5, which are fixedly installed in the middle area of ​​the reversing air duct 13 along the first direction x. The two second flow guiding components 5 are symmetrical with respect to the plane perpendicular to the first direction x. The second flow guiding components 5 are configured to guide the airflow of the first outlet 201 to the first main air outlet 10 or the second air outlet 20. Each centrifugal fan 2 is provided with a first flow guiding component 3 between itself and the second flow guiding component 5 on the same side.

[0159] Specifically, the outer contours of the two second flow guide components 5 are joined to form a rhomboid structure. Optionally, the third flow guide plate 53 and the fourth flow guide plate 54 can be straight inclined plates or arc-shaped and concave inward. Thus, each centrifugal fan 2 is provided with a first flow guide component 3 between itself and the second flow guide component 5 on the same side.

[0160] In this embodiment, a second flow guiding component 5 is provided for each centrifugal fan 2, ensuring that the airflow from each centrifugal fan 2 is guided to the first main air outlet 10 or the second air outlet 20. Furthermore, the symmetrical arrangement of the two second flow guiding components 5 ensures that the airflow areas corresponding to the airflow from the two centrifugal fans 2 are consistent, resulting in uniform airflow from the two first main air outlets 10 or the two second air outlets 20. In addition, each second flow guiding component 5 is correspondingly provided with a first flow guiding component 3, allowing for independent control of the airflow from each centrifugal fan 2, enabling the second flow guiding component 5 and the first flow guiding component 3 to work together to achieve airflow distribution.

[0161] In some embodiments, such as Figures 12 to 15 As shown, the angle between the inner axial side surface 24 of each centrifugal fan 2 and the side wall 130 of the reversing duct 13 connected to the inner axial side surface 24 is a first preset angle, which is an obtuse angle.

[0162] Specifically, when the first preset included angle α is an obtuse angle, the angle between the second rotation axis of the centrifugal fan 2 and the first direction x forms an acute angle. Optionally, an arc-shaped transition can be used between the fan outlet 200 and the air inlet of the reversing duct 13.

[0163] This embodiment sets the first preset angle α to an obtuse angle. In the projection plane perpendicular to the third direction z, the turning angle between the air outlet direction of the first outlet 201 and the air inlet direction of the reversing duct 13 can be an acute angle. Compared with a right angle or an obtuse angle, this can significantly reduce the kinetic energy loss during the airflow turning process.

[0164] In some embodiments, the first preset included angle ranges from 110° to 120°.

[0165] This embodiment sets the first preset angle to a range of 110° to 120°. In the projection plane perpendicular to the third direction z, the turning angle between the air outlet direction of the first outlet 201 and the air inlet direction of the reversing duct 13 is between 60° and 70°. This not only makes full use of the space to arrange the centrifugal fan 2 and reduces the length occupied by the centrifugal fan 2 in the first direction x, but also minimizes the kinetic energy loss during the airflow turning process.

[0166] In some embodiments, such as Figures 12 to 14 As shown, each centrifugal fan 2 has a fan inlet 220 on its axial inner surface 24, and the duct assembly also includes:

[0167] The heat exchanger assembly 6 is disposed between the two centrifugal fans 2 along the first direction x, with the windward side of the heat exchanger assembly 6 facing away from the reversing air duct 13.

[0168] In this embodiment, the heat exchanger assembly 6 is located between two centrifugal fans 2, which can exchange heat with the return air entering the fan inlet 220 along the left and right sides of the first direction x, thereby improving the heat exchange efficiency.

[0169] In some embodiments, such as Figures 12 to 14 As shown, the heat exchanger assembly 6 includes two heat exchange plates 60. The first end of each of the two heat exchange plates 60 is close to the ends of the two centrifugal fans 2 away from the reversing air duct 13. The second end of each of them forms a connection end in the middle region along the first direction x. Both heat exchange plates 60 are inclined, and their second ends are closer to the reversing air duct 13 in the second direction y than their first ends. The second direction y is perpendicular to the first direction x.

[0170] This embodiment, by setting two heat exchange plates 60 in a bent shape, can make full use of the space between the two centrifugal fans 2, and can also fully exchange heat with the return air entering the fan inlet 220 along both sides of the first direction x, thereby improving the heat exchange efficiency of the heat exchanger assembly 6 and achieving a balance between the two.

[0171] In some embodiments, such as Figures 12 to 15 As shown, the two centrifugal fans 2 and the two heat exchange plates 60 are symmetrically arranged with respect to the plane perpendicular to the first direction x. The acute angle between the heat exchange plate 60 and the outer axial side 25 of the centrifugal fan 2 on the same side is the second preset angle, and the value of the second preset angle is from 10° to 20°.

[0172] Specifically, such as Figure 15 and Figure 16 As shown, the larger the angle between the heat exchanger assembly 6 and the fan inlet 220, the larger the area of ​​the heat exchanger projected onto the fan inlet surface, which is more conducive to heat exchange. However, an excessively large angle will exacerbate the uneven flow velocity at the inlet surface, affecting the fan's air intake. For example, the turning radius of airflow B is small, while that of airflow C is large, and the flow velocity of airflow B will be significantly greater than that of airflow C.

[0173] This embodiment, by setting the value of the second preset included angle β to be in the range of 10° to 20°, can take into account both the heat exchanger area projected on the fan inlet surface and the uniformity of air intake, thereby improving the uniformity of air output of the air duct assembly.

[0174] Secondly, such as Figure 17 and Figure 18 As shown, this disclosure proposes an indoor unit for an air conditioner, comprising:

[0175] Casing 100, including front panel 110; and

[0176] The air duct assembly of the above embodiment is located inside the housing 100 and the reversing air duct 13 is close to the front panel 110. The indoor unit of the air conditioner is configured to use an upper air outlet state in the cooling mode and a lower air outlet state in the heating mode.

[0177] The indoor unit of the air conditioner in this embodiment has a wide air supply surface of its air duct assembly, which provides balanced air supply and high air quality, and good airflow stability, which can meet various application scenarios. It can switch between the upper air supply state in cooling mode and the lower air supply state in heating mode, and can realize cold air blowing upward and hot air blowing downward, thereby optimizing the cooling and heating effect and improving user comfort.

[0178] In some embodiments, such as Figures 1 to 18 As shown, the housing 100 also includes a top plate 120 and a bottom plate 140. The top plate 120 is provided with a first opening 121 and a second opening 122. The first opening 121 is closer to the front plate 110 than the second opening 122. The bottom plate 140 is provided with a third opening 143 and a fourth opening 144. The third opening 143 is closer to the front plate 110 than the fourth opening 144. The second opening 122 and the fourth opening 144 are used for air intake, and the first opening 121 and the third opening 143 are used for air exhaust.

[0179] In this embodiment, the rear area of ​​the indoor unit is the air intake area, and the front area is the air outlet area. During operation, the rear air intake and front air outlet of the indoor unit can be separated, thereby optimizing the indoor airflow circulation and improving user comfort.

[0180] In addition, this disclosure also proposes an air conditioning unit, including the air duct assembly of the above embodiments, or the air conditioning indoor unit of the above embodiments.

[0181] The air conditioning unit of this embodiment has a wide air supply surface of its air duct component, balanced air supply and high air quality, and good airflow stability, which can meet various application scenarios. Its indoor air conditioning unit can switch between the upper air supply state in cooling mode and the lower air supply state in heating mode, and can realize cold air blowing upward and hot air blowing downward, thereby optimizing the cooling and heating effect and improving user comfort.

[0182] 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 main air outlet (10) on its top wall (11) and a second air outlet (20) on its bottom wall (12). The housing (1) is provided with a reversing air duct (13), which is connected to the first main air outlet (10) and the second air outlet (20). A centrifugal fan (2) is disposed within the housing (1) and located at the end of the housing (1) along a first direction (x). The centrifugal fan (2) includes a volute assembly (21). A fan outlet (200) is provided on the circumferential sidewall of the volute assembly (21). The fan outlet (200) includes a first outlet (201). The first outlet (201) is connected to the reversing air duct (13). The area of ​​the first outlet (201) is smaller than that of the first main air outlet (10) and the second air outlet (20). A first airflow guiding component (3) is disposed within the reversing air duct (13). The first airflow guiding component (3) is configured to rotatably switch between a first position and a second position so that the air duct assembly switches between an upper air outlet state and a lower air outlet state. When the first airflow guiding component (3) is in the first position, the first outlet (201) and the first main air outlet (10) are connected. When the first airflow guiding component (3) is in the second position, the first outlet (201) and the second air outlet (20) are connected.

2. The air duct assembly according to claim 1, characterized in that, The two sidewalls (130) of the reversing air duct (13) are spaced apart along the second direction (y), which is perpendicular to the first direction (x). The first flow guide assembly (3) is connected between the two sidewalls (130) of the reversing air duct (13) along the second direction (y).

3. The air duct assembly according to claim 1, characterized in that, The first flow guiding component (3) includes: A bracket (33) is rotatably connected to the sidewall (130) of the reversing duct (13) about a first rotation axis extending along a second direction (y), the second direction (y) being perpendicular to the first direction (x); and A first guide plate (31) is disposed at the end of the bracket (33) radially away from the first axis of rotation. The first guide plate (31) is arc-shaped and protrudes in a direction away from the first axis of rotation.

4. The air duct assembly according to claim 3, characterized in that, The first flow guiding component (3) further includes: The second guide plate (32) is disposed on the bracket (33). The second guide plate (32) and the first guide plate (31) are arranged radially apart along the bracket (33) and located radially inside the first guide plate (31). The second guide plate (32) is arc-shaped and protrudes in a direction away from the first rotation axis.

5. The air duct assembly according to claim 4, characterized in that, The support (33) includes: Both the first part (331) and the second part (332) extend radially; and The third part (333) is arc-shaped and connected between the first part (331) and the second part (332). The first part (331), the second part (332) and the third part (333) form a fan-shaped structure. The first guide plate (31) and the second guide plate (32) are both connected between the first part (331) and the second part (332).

6. The air duct assembly according to claim 3, characterized in that, Also includes: A sealing assembly (4) is disposed at the end of the bracket (33) radially away from the first rotation axis, and the sealing assembly (4) is located between the bracket (33) and the sidewall (130) of the reversing air duct (13).

7. The air duct assembly according to claim 6, characterized in that, The sealing assembly (4) includes a first sealing part (41) and a second sealing part (42). The first sealing part (41) is located on the side of the bracket (33) away from the first guide plate (31), and the second sealing part (42) is located on the side wall (130) of the reversing air duct (13). The first sealing part (41) and the second sealing part (42) are in a concave-convex fit.

8. The air duct assembly according to claim 7, characterized in that, The first sealing portion (41) includes a first sealing edge (411), and the second sealing portion (42) includes a third sealing edge (423). Both the first sealing edge (411) and the third sealing edge (423) are arc-shaped. In the direction in which the first flow guiding assembly (3) rotates from the first position to the second position, the height of the third sealing edge (423) gradually increases. The third sealing edge (423) is configured to engage with the first sealing edge (411) in a concave-convex fit when the first flow guiding assembly (3) is in the second position; and / or The first sealing portion (41) includes a second sealing edge (412), the second sealing portion (42) includes a fourth sealing edge (424), both the second sealing edge (412) and the fourth sealing edge (424) are arc-shaped, the second sealing edge (412) and the first sealing edge (411) are arranged radially spaced apart, the fourth sealing edge (424) and the third sealing edge (423) are arranged radially spaced apart, the height of the fourth sealing edge (424) gradually increases in the direction in which the first flow guiding assembly (3) rotates from the second position to the first position, and the fourth sealing edge (424) is configured to cooperate with the second sealing edge (412) when the first flow guiding assembly (3) is in the first position.

9. The air duct assembly according to claim 1, characterized in that, Also includes: The third sealing part (43) protrudes in an arc shape from the inner side of the side wall (130) of the reversing air duct (13), and the third sealing part (43) is located radially outside the movement trajectory of the first guide assembly.

10. The air duct assembly according to claim 1, characterized in that, Also includes: The second airflow guiding component (5) is fixedly disposed in the reversing air duct (13) and is configured to guide the airflow from the first outlet (201) and via the first airflow guiding component (3) to the first main air outlet (10) or the second air outlet (20).

11. The air duct assembly according to claim 10, characterized in that, The housing (1) has an end plate (14) at the end away from the centrifugal fan (2) along the first direction (x). The second flow guiding assembly (5) includes a third flow guiding plate (53) and a fourth flow guiding plate (54). The first ends of each are respectively connected to the area of ​​the end plate (14) near the top wall (11) and the area of ​​the end plate (14) near the bottom wall (12). The second ends of each form a connection end in the middle area of ​​the reversing air duct (13) along the third direction (z). The third direction (z) is perpendicular to the first direction (x). The third flow guiding plate (53) and the fourth flow guiding plate (54) are inclined, and their second ends are closer to the centrifugal fan (2) in the first direction (x) than their first ends.

12. The air duct assembly according to claim 11, characterized in that, The first flow guiding component (3) is rotatable about a first rotation axis. The first flow guiding component (3) includes a first flow guiding plate (31), which is arc-shaped and protrudes in a direction away from the first rotation axis. The reversing air duct (13) is provided with a first limiting member (131) in the area near the top wall (11). The first limiting member (131) is configured to limit the first flow guiding plate (31) to limit the first flow guiding component (3) to the second position. The reversing air duct (13) is provided with a second limiting member (132) in the area near the bottom wall (12). The second limiting member (132) is configured to limit the first flow guiding plate (31) to limit the first flow guiding component (3) to the first position.

13. The air duct assembly according to claim 12, characterized in that, The first guide plate (31) is provided with a first limiting part (311) and a second limiting part (312) at both ends along the circumferential direction. The first limiting part (311) and the second limiting part (312) are both bent in a direction away from the first rotation axis. When the first guide assembly (3) is in the second position, the first limiting part (311) overlaps with the first limiting member (131) and the second limiting part (312) overlaps with the connecting end. When the first guide assembly (3) is in the first position, the first limiting part (311) overlaps with the connecting end and the second limiting part (312) overlaps with the second limiting member (132).

14. The air duct assembly according to claim 13, characterized in that, Also includes: The third sealing part (43) protrudes in an arc shape from the inner side of the side wall (130) of the reversing air duct (13), and the third sealing part (43) is sequentially connected to the first limiting member (131), the connecting end and the second limiting member (132).

15. The air duct assembly according to claim 1, characterized in that, The top wall (11) is provided with a first secondary air outlet (30), which is configured to open when the air duct assembly is in the upper air outlet state and to close when the air duct assembly is in the lower air outlet state. The fan outlet (200) also includes a second outlet (202), which is connected to the first secondary air outlet (30) and the reversing air duct (13). The centrifugal fan (2) also includes a third flow guide assembly (23), which is located between the first outlet (201) and the second outlet (202) along a third direction (z). The third flow guide assembly (23) is configured to separate the upstream airflow and the downstream airflow in the centrifugal fan (2), and the third direction (z) is perpendicular to the first direction (x).

16. The air duct assembly according to claim 15, characterized in that, The centrifugal fan (2) further includes a centrifugal fan blade (22), and the third flow guiding assembly (23) includes a fifth flow guiding plate (235) and a sixth flow guiding plate (236). The fifth flow guiding plate (235) and the centrifugal fan blade (22) are coaxially arranged along the airflow direction. The sixth flow guiding plate (236) is connected downstream of the fifth flow guiding plate (235), and the end of the sixth flow guiding plate (236) away from the fifth flow guiding plate (235) is inclined towards the direction close to the top wall (11).

17. The air duct assembly according to any one of claims 1 to 11, 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).

18. The air duct assembly according to claim 17, characterized in that, The top wall (11) is provided with two independent first main air outlets (10) along the first direction (x), and the bottom wall (12) is provided with two independent second air outlets (20) along the first direction (x). Each centrifugal fan (2) is provided with a corresponding first flow guiding component (3). The first outlet (201) of each centrifugal fan (2) can be selectively connected to the first main air outlet (10) or the second air outlet (20) on the same side.

19. The air duct assembly according to claim 17, characterized in that, It also includes two second flow guiding components (5), which are fixedly disposed in the middle region of the reversing air duct (13) along the first direction (x), and the two second flow guiding components (5) are symmetrical with respect to the plane perpendicular to the first direction (x). The second flow guiding components (5) are configured to guide the airflow of the first outlet (201) to the first main air outlet (10) or the second air outlet (20). Each centrifugal fan (2) is provided with the first flow guiding component (3) between it and the second flow guiding component (5) on the same side.

20. The air duct assembly according to claim 17, characterized in that, The angle between the axial inner side (24) of each centrifugal fan (2) and the side wall (130) of the reversing duct (13) connected to the axial inner side (24) is a first preset angle, which is an obtuse angle.

21. The air duct assembly according to claim 20, characterized in that, The first preset included angle ranges from 110° to 120°.

22. The air duct assembly according to claim 20, characterized in that, Each of the centrifugal fans (2) has a fan inlet (220) on its axial inner side (24), and the duct assembly further includes: A heat exchanger assembly (6) is disposed between the two centrifugal fans (2) along the first direction (x), with the windward side of the heat exchanger assembly (6) facing away from the reversing duct (13).

23. The air duct assembly according to claim 20, characterized in that, The heat exchanger assembly (6) includes two heat exchange plates (60). The first end of each of the two heat exchange plates (60) is close to the ends of the two centrifugal fans (2) away from the reversing air duct (13). The second end of each of them forms a connection end in the middle region along the first direction (x). Both heat exchange plates (60) are inclined, and the second end of each of them is closer to the reversing air duct (13) in the second direction (y) than the first end. The second direction (y) is perpendicular to the first direction (x).

24. The air duct assembly according to claim 23, characterized in that, The two centrifugal fans (2) and the two heat exchange plates (60) are symmetrically arranged with respect to the plane perpendicular to the first direction (x). The acute angle between the heat exchange plate (60) and the axial outer side (25) of the centrifugal fan (2) on the same side is a second preset angle, and the value of the second preset angle is in the range of 10° to 20°.

25. An indoor unit for an air conditioner, characterized in that, include: The housing (100) includes the front panel (110); and The air duct assembly according to any one of claims 1 to 24, wherein the air duct assembly is disposed within the housing (100) and the reversing air duct (13) is close to the front panel (110), and the indoor unit of the air conditioner is configured to use the upper air outlet state in the cooling mode and the lower air outlet state in the heating mode.

26. The indoor unit of the air conditioner according to claim 25, characterized in that, The housing (100) further includes a top plate (120) and a bottom plate (140). The top plate (120) is provided with a first opening (121) and a second opening (122). The first opening (121) is closer to the front plate (110) than the second opening (122). The bottom plate (140) is provided with a third opening (143) and a fourth opening (144). The third opening (143) is closer to the front plate (110) than the fourth opening (144). The second opening (122) and the fourth opening (144) are used for air intake, and the first opening (121) and the third opening (143) are used for air exhaust.

27. An air conditioning unit, characterized in that, It includes the air duct assembly as described in any one of claims 1 to 24, or the air conditioning indoor unit as described in claim 25 or 26.

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