Air duct component for air conditioner indoor unit and air conditioner indoor unit

By designing air duct parts for air conditioning indoor units, and using raised ribs to support air duct skeletons and heat exchangers, the vertical placement of air duct parts is achieved, solving the problem of space occupation and storage difficulties during transportation and maintenance, and improving the Transport safety and quality assurance.

CN222504252UActive Publication Date: 2025-02-18QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD +2
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Patent Information

Application Number
CN202421175332.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-27
Publication Date
2025-02-18
Estimated Expiration
2034-05-27

AI Technical Summary

Technical Problem

When transporting or repairing air duct parts, existing air conditioners need to be placed horizontally, which will occupy a large space and increase storage difficulty.

Method used

An air duct component for an air conditioning indoor unit is designed, including a heat exchanger, an air duct skeleton and a raised rib. The air duct skeleton consists of a first pallet, a second pallet, a first connecting column, a second connecting column and a third connecting column. The raised ribs include a first raised rib and a plurality of second raised ribs for supporting the air The duct skeleton and heat exchanger ensure that the air duct parts can be placed vertically during transportation or maintenance.

Benefits of technology

By placing air duct parts vertically, storage and transportation space is saved, storage difficulty of air duct parts is simplified, and the heat exchanger is avoided being squeezed by the support surface during storage, reducing the risk of damage and improving quality assurance.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides an air duct component for an air conditioner indoor unit and the air conditioner indoor unit. The air duct component comprises a heat exchanger, an air duct framework and protruding ribs. The heat exchanger comprises a body and a refrigerant inlet and outlet pipe. The air duct framework comprises a first tray and a second tray which are arranged at intervals in the vertical direction. The body is mounted between the first tray and the second tray. The protruding rib is vertically arranged and fixedly connected to the side, away from the body, of the first tray. The protruding ribs comprise the first protruding rib and the multiple second protruding ribs, and the first protruding rib is located on one side of the refrigerant inlet and outlet pipe in the length direction. The tops of the first protruding ribs and the tops of the second protruding ribs are located on the same plane so that the air duct framework can be supported when the heat exchanger is not installed on the air duct framework, the air duct framework, the heat exchanger and the air duct component can be supported to be vertically placed when the heat exchanger is installed on the air duct framework, the use space is saved, and the storage difficulty is lowered. The air duct component is supported through the protruding ribs, and toppling caused by gravity center change of the air duct component when the heat exchanger is disassembled and assembled is avoided.
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Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to an air duct component for an indoor unit of an air conditioner and the indoor unit of the air conditioner. Background Art

[0002] The air conditioner includes an indoor unit, and the air duct of the indoor unit is in the air duct component. The indoor unit realizes air intake and air supply through the air duct, and a heat exchanger is arranged in the air duct to adjust the air supply temperature. When transporting or repairing the air duct component of the existing air conditioner, the air duct component usually needs to be placed horizontally.

[0003] However, if the air duct components are placed horizontally during transportation or maintenance, the air duct components will occupy a larger usable space, which increases the difficulty of storing the air duct components. Utility Model Content

[0004] In view of the above problems, the present utility model is proposed to provide an air duct component for an air conditioner indoor unit and an air conditioner indoor unit that overcome the above problems or at least partially solve the above problems, and can solve the problem that the air duct component occupies a large usable space during transportation or maintenance, thereby increasing the difficulty of storing the air duct component.

[0005] Specifically, the utility model provides an air duct component for an indoor unit of an air conditioner, comprising:

[0006] A heat exchanger comprises a main body and vertically arranged refrigerant inlet and outlet pipes.

[0007] The air duct frame comprises a first tray and a second tray arranged in a vertical interval. The body is installed between the first tray and the second tray.

[0008] The raised rib is vertically arranged and fixedly connected to a side of the first tray away from the main body.

[0009] The raised ribs include a first raised rib and a plurality of second raised ribs, wherein the first raised rib is located at one side of the length direction of the refrigerant inlet and outlet pipe. The tops of the first raised rib and the plurality of second raised ribs are located at the same plane to support the duct frame when the heat exchanger is not installed on the duct frame, and to support the duct frame and the heat exchanger when the heat exchanger is installed on the duct frame.

[0010] Optionally, the first tray and the second tray are both arranged horizontally, and the first tray is located on the upper side of the second tray.

[0011] The lower end of the refrigerant inlet and outlet pipe is located at the lower side of the second tray.

[0012] Optionally, the main body is mounted on the air duct frame from the rear side.

[0013] The upper end of the refrigerant inlet and outlet pipe is fixedly connected to the front side of one lateral side of the body.

[0014] Optionally, the air duct skeleton further includes a first connecting column and a second connecting column vertically arranged, and the first connecting column and the second connecting column are both fixedly connected between the first tray and the second tray; the first connecting column and the second connecting column are respectively located at the two lateral ends of the front end of the first tray.

[0015] Optionally, the first raised rib is located on an upper side of the first connecting column.

[0016] Optionally, in the left-right direction, there are at least two second protruding ribs between the first connecting column and the second connecting column.

[0017] Optionally, a third connecting column is vertically arranged, and the third connecting column is fixedly connected between the first tray and the second tray.

[0018] The third connecting post is located at the rear end of the first tray and between the first connecting post and the second connecting post in the left-right direction.

[0019] In the front-to-back direction, all of the second raised ribs are located between the third connecting column and the two connecting columns.

[0020] Optionally, there are three second protruding ribs. In the left-right direction, one second protruding rib is located between the first connecting column and the third connecting column, another second protruding rib is located between the third connecting column and the second connecting column, and the third second protruding rib is located at the rear side of the second connecting column.

[0021] Optionally, the first tray, the second tray, the raised ribs, the two connecting posts and the third connecting post are all integrally formed.

[0022] Optionally, the first raised rib is a laterally extending trapezoidal plate, and a first reinforcing rib connected to the first tray is provided on the rear side of the trapezoidal plate. And / or

[0023] The second raised rib is cylindrical. The circumferential side of the second raised rib is connected to a second reinforcing rib connected to the first tray. The second reinforcing rib is triangular. There are multiple second reinforcing ribs, and the multiple second reinforcing ribs are evenly and spacedly distributed along the circumferential direction of the second raised rib.

[0024] Optionally, at least one wind wheel mounting structure for mounting a wind wheel of a crossflow blower is provided on the first tray.

[0025] The two wind wheel mounting structures are respectively located on the left and right sides of the third connecting column.

[0026] The utility model also provides an air conditioner indoor unit, comprising a casing and the above-mentioned air duct component. The air duct component is installed in the casing.

[0027] In the air duct component of the utility model, the first raised rib and the plurality of second raised ribs can support the air duct component during the process of transporting or repairing the air duct component.

[0028] Since the center of gravity of the air duct component will change after the heat exchanger is disassembled, the first raised rib and multiple second raised ribs of the utility model can prevent the air duct component from tipping over due to the change in the center of gravity. Moreover, the air duct component is transported or stored vertically through the raised ribs, which saves storage and transportation space and simplifies the storage difficulty of the air duct component. The vertical transportation or storage of the air duct component also prevents the heat exchanger from being squeezed by the supporting surface during storage, reduces the risk of damage to the heat exchanger during storage or transportation, and improves quality assurance.

[0029] Based on the detailed description of the specific embodiments of the present invention in combination with the accompanying drawings below, those skilled in the art will become more aware of the above and other purposes, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0031] Figure 1 is a schematic front view of an air duct component according to an embodiment of the utility model;

[0032] Figure 2 is a schematic structural diagram of an air duct component according to an embodiment of the utility model;

[0033] Figure 3 It is a schematic partial structural diagram of an air duct component according to an embodiment of the utility model.

[0034] List of reference numerals: 100, heat exchanger; 110, main body; 120, refrigerant inlet and outlet pipes; 200, air duct frame; 210, first tray; 220, second tray; 230, first connecting column; 240, second connecting column; 250, third connecting column; 300, raised rib; 310, first raised rib; 311, first reinforcing rib; 320, second raised rib; 321, second reinforcing rib. DETAILED DESCRIPTION

[0035] Refer to the following Figures 1 to 3 To describe the air duct component for an air conditioner indoor unit and the air conditioner indoor unit of an embodiment of the utility model. In the description of this embodiment, it should be understood that the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a feature "includes or contains" one or some of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and other features may be further included.

[0036] Unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix", "couple" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. A person of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present utility model according to the specific circumstances.

[0037] In addition, in the description of this embodiment, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. That is, in the description of this embodiment, the first feature being "above", "above", and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below", or "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] In the description of the present embodiment, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0039] Figure 1 is a schematic front view of an air duct component according to an embodiment of the utility model, as shown Figure 1 As shown, and refer to Figures 2 to 3 The embodiment of the utility model provides an air duct component for an indoor unit of an air conditioner. The air duct component includes a heat exchanger 100 , an air duct frame 200 and a protruding rib 300 .

[0040] The heat exchanger 100 includes a body 110 and a vertically arranged refrigerant inlet and outlet pipe 120;

[0041] The air duct frame 200 includes a first tray 210 and a second tray 220 arranged vertically at intervals; the body 110 is installed between the first tray 210 and the second tray 220;

[0042] The raised rib 300 is vertically arranged and fixedly connected to a side of the first tray 210 away from the main body 110;

[0043] The raised ribs 300 include a first raised rib 310 and a plurality of second raised ribs 320, the first raised rib 310 being located on one side of the length direction of the refrigerant inlet and outlet pipe 120; the tops of the first raised rib 310 and the plurality of second raised ribs 320 are both in the same plane, so as to support the air duct frame 200 when the heat exchanger 100 is not installed on the air duct frame 200, and to support the air duct frame 200 and the heat exchanger 100 when the heat exchanger 100 is installed on the air duct frame 200.

[0044] In this embodiment, the first raised rib 310 and the plurality of second raised ribs 320 can support the air duct component when the air duct component needs to be transported or repaired.

[0045] Since the center of gravity of the air duct component will change after the heat exchanger 100 is disassembled, the provision of the first raised rib 310 and the plurality of second raised ribs 320 of the utility model can prevent the air duct component from tipping over due to the change in the center of gravity.

[0046] Moreover, if the air duct components are placed horizontally, on the one hand, they will occupy a large space during transportation, resulting in low space utilization, and on the other hand, they will cause damage such as crushing to the main body 110 of the heat exchanger 100, making it difficult to ensure the transportation safety of the air duct components. Transporting or storing the air duct components vertically through the raised ribs 300 saves storage and transportation space for the air duct components and simplifies the storage difficulty of the air duct components. Vertical transportation or storage of the air duct components also avoids the heat exchanger 100 being squeezed by the supporting surface during storage, reduces the risk of damage to the heat exchanger 100 during storage or transportation, and improves quality assurance.

[0047] In some embodiments of the air duct component of the present invention, Figure 2As shown, the first tray 210 and the second tray 220 are both arranged horizontally, and the first tray 210 is located on the upper side of the second tray 220;

[0048] The lower end of the refrigerant inlet and outlet pipe 120 is located at the lower side of the second tray 220 .

[0049] When transporting or storing the air duct component, the first raised rib 310 and the plurality of second raised ribs 320 contact the support surface. At this time, the second tray 220 is located on the upper side of the first tray 210, and the refrigerant inlet and outlet pipe 120 extends upward to avoid contact with the support surface.

[0050] In this embodiment, the lower end of the refrigerant inlet and outlet pipe 120 is located at the lower side of the second tray 220. Compared with the case where the protruding rib 300 is disposed on the first tray 210, the protruding rib 300 can be disposed on the second tray 220 to avoid interference caused by the excessive length of the refrigerant inlet and outlet pipe 120, which results in the protruding rib 300 being too long. Moreover, the protruding rib 300 having an excessive length is not conducive to the stability of the air duct component when it is placed.

[0051] In some embodiments of the air duct component of the present invention, Figure 2 As shown, the body 110 is mounted on the air duct frame 200 from the rear side;

[0052] The upper end of the refrigerant inlet and outlet pipe 120 is fixedly connected to the front side of one lateral side of the body 110 .

[0053] In this embodiment, the air duct frame 200 is placed on the support surface, and when the heat exchanger 100 needs to be installed, the body 110 of the heat exchanger 100 is mounted on the air duct frame 200 from the rear side, and because the upper end of the refrigerant inlet and outlet pipes 120 of the heat exchanger 100 is connected to the front side of the body 110, the overall center of gravity of the air duct frame 200 before and after the heat exchanger 100 is installed is different, and due to the setting of the refrigerant inlet and outlet pipes 120, the center of gravity is offset toward the first raised rib 310. However, the utility model is provided with a first raised rib 310 and a second raised rib 320 that cooperates with the first raised rib 310, which avoids the tilting of the air duct component after the center of gravity changes.

[0054] In some embodiments of the air duct component of the present invention, Figure 1 and Figure 2 As shown, the air duct skeleton 200 also includes a first connecting column 230 and a second connecting column 240 which are vertically arranged, and the first connecting column 230 and the second connecting column 240 are both fixedly connected between the first tray 210 and the second tray 220; the first connecting column 230 and the second connecting column 240 are respectively located at the two lateral ends of the front end of the first tray 210.

[0055] In this embodiment, the first tray 210 is connected to the second tray 220 through the first connecting column 230 and the second connecting column 240. The first connecting column 230 and the second connecting column 240 are respectively located at the two ends of the front end of the first tray 210 in the horizontal direction, so as to avoid interference with the installation of the body 110 of the heat exchanger 100 when the body 110 is installed on the air duct frame 200 from the rear side.

[0056] Preferably, the first tray 210 , the second tray 220 , the first connecting column 230 and the second connecting column 240 are an integrally formed structure.

[0057] In some embodiments of the air duct component of the present invention, Figure 2 As shown, the first protruding rib 310 is located on the upper side of the first connecting column 230 .

[0058] In this embodiment, the refrigerant inlet and outlet pipe 120 is arranged close to the first connecting column 230, and the first protruding rib 310 is arranged on the upper side of the first connecting column 230 to prevent the air duct component from tipping over due to the change in center of gravity after the heat exchanger 100 is installed or removed.

[0059] Preferably, the first protruding rib 310 and the first connecting column 230 are an integrally formed structure.

[0060] In some embodiments of the air duct component of the present invention, Figure 1 As shown, in the left-right direction, there are at least two second raised ribs 320 between the first connecting column 230 and the second connecting column 240 to improve the support for the middle part of the duct component, thereby improving the stability of the duct component when placed vertically during transportation or storage.

[0061] In some embodiments of the air duct component of the present invention, Figure 1 and Figure 2 As shown, the air duct component further includes a third connecting column 250 vertically arranged, and the third connecting column 250 is fixedly connected between the first tray 210 and the second tray 220;

[0062] The third connecting post 250 is located at the rear end of the first tray 210 and between the first connecting post 230 and the second connecting post 240 in the left-right direction;

[0063] In the front-to-back direction, all the second protruding ribs 320 are located between the third connecting column 250 and the two connecting columns.

[0064] In this embodiment, the third connecting column 250 is provided at the rear end of the first tray 210 and is connected between the first tray 210 and the second tray 220. After the body 110 of the heat exchanger 100 is mounted on the air duct frame 200 from the rear side, the third connecting column 250 is located at the front side of the body 110, which can limit the installation of the body 110 to remind the installation operator that the heat exchanger 100 is installed in place. In addition, the third connecting column 250 can also be used to improve the stability of the connection between the first tray 210 and the second tray 220.

[0065] In some embodiments of the air duct component of the present invention, Figure 2 and Figure 3 As shown, there are three second protruding ribs 320; in the left-right direction, one second protruding rib 320 is located between the first connecting column 230 and the third connecting column 250, another second protruding rib 320 is located between the third connecting column 250 and the second connecting column 240; the third second protruding rib 320 is located at the rear side of the second connecting column 240. The distribution of the protruding ribs 300 in this embodiment can play a better supporting role, helping the air duct component to be placed vertically on the supporting surface more stably.

[0066] In some embodiments of the air duct component of the utility model, two wind wheel mounting structures for mounting the wind wheel of the crossflow fan are provided on the first tray 210; the wind wheel mounting structures are respectively located on the left and right sides of the third connecting column 250;

[0067] In this embodiment, there are two wind wheel installation structures, so the two wind wheels are respectively arranged in the two wind wheel installation structures, and the two wind wheels are arranged symmetrically. Specifically, the double wind wheel arrangement can expand the air distribution range, increase the air supply volume, and improve the efficiency of cooling or heating.

[0068] In some embodiments of the air duct component of the present invention, the first tray 210, the second tray 220, the raised ribs 300, the two connecting columns and the third connecting column 250 are all integrally formed to improve the structural strength of the air duct component and avoid low production efficiency of the air duct component due to installation errors.

[0069] In some embodiments of the air duct component of the present invention, Figure 3 As shown, the first raised rib 310 is a trapezoidal plate extending laterally, and a first reinforcing rib 311 connected to the first tray 210 is provided on the rear side of the trapezoidal plate;

[0070] In this embodiment, the first raised rib 310 is set as a trapezoidal plate, which saves materials, has low cost, and is easy to process and manufacture. The first reinforcing rib 311 can support the first raised rib 310, helping the first raised rib 310 to play a better supporting role when supporting the air duct component. In addition, the first reinforcing rib 311 can reinforce the structure of the first raised rib 310, making the structure of the first raised rib 310 more stable and reliable.

[0071] In some embodiments of the air duct component of the present invention, Figure 3 As shown, the second protruding rib 320 is cylindrical; the circumferential side of the second protruding rib 320 is connected to a second reinforcing rib 321 connected to the first tray 210; preferably, the second reinforcing rib 321 is triangular;

[0072] In this embodiment, the second reinforcing rib 321 can support the second protruding rib 320, helping the second protruding rib 320 to better support the air duct component. In addition, the second reinforcing rib 321 can reinforce the structure of the second protruding rib 320, making the structure of the second protruding rib 320 more stable and reliable.

[0073] Furthermore, there are multiple second reinforcing ribs 321 , and the multiple second reinforcing ribs 321 are evenly and spacedly distributed along the circumferential direction of the second raised rib 320 .

[0074] In some embodiments of the air duct component of the utility model, the interior of the second raised rib 320 is hollow to reduce the weight of the second raised rib 320 and avoid affecting the supporting effect of the second raised rib 320, saving material costs and achieving a lightweight design.

[0075] The embodiment of the utility model further provides an air conditioner indoor unit. In some embodiments of the air conditioner indoor unit of the utility model, the air conditioner indoor unit comprises a casing and an air duct component in any of the above embodiments. The air duct component is installed in the casing.

[0076] In this embodiment, the first raised rib 310 and the plurality of second raised ribs 320 can support the air duct component when the air duct component needs to be transported or repaired. Since the center of gravity of the air duct component will change after the heat exchanger 100 is disassembled, the provision of the first raised rib 310 and the plurality of second raised ribs 320 of the utility model can prevent the air duct component from tipping over due to the change in the center of gravity. Moreover, the air duct component is transported or stored vertically through the raised ribs 300, which saves storage and transportation space and simplifies the storage difficulty of the air duct component. The vertical transportation or storage of the air duct component also avoids the heat exchanger 100 from being squeezed by the supporting surface during storage, reduces the risk of damage to the heat exchanger 100 during storage or transportation, and improves quality assurance.

[0077] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the contents disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. An air duct component for an indoor unit of an air conditioner, characterized in that: include: A heat exchanger, the heat exchanger comprising a body and vertically arranged refrigerant inlet and outlet pipes; An air duct frame, the air duct frame comprising a first tray and a second tray arranged vertically at intervals; the body is installed between the first tray and the second tray; A raised rib, the raised rib is vertically arranged and fixedly connected to a side of the first tray away from the main body; The raised ribs include a first raised rib and a plurality of second raised ribs, the first raised rib being located on one side of the length direction of the refrigerant inlet and outlet pipe; the tops of the first raised rib and the plurality of second raised ribs are all in the same plane, so as to support the air duct frame when the heat exchanger is not installed on the air duct frame, and to support the air duct frame and the heat exchanger when the heat exchanger is installed on the air duct frame.

2. The air duct component according to claim 1, characterized in that: The first tray and the second tray are both arranged horizontally, and the first tray is located on the upper side of the second tray; The lower end of the refrigerant inlet and outlet pipe is located at the lower side of the second tray.

3. The air duct component according to claim 2, characterized in that: The main body is mounted on the air duct frame from the rear side; The upper end of the refrigerant inlet and outlet pipe is fixedly connected to the front side of one lateral side of the body.

4. The air duct component according to claim 1, characterized in that: The air duct skeleton also includes a first connecting column and a second connecting column arranged vertically, and the first connecting column and the second connecting column are both fixedly connected between the first tray and the second tray; the first connecting column and the second connecting column are respectively located at the two lateral ends of the front end of the first tray.

5. The air duct component according to claim 4, characterized in that: The first protruding rib is located on the upper side of the first connecting column.

6. The air duct component according to claim 4, characterized in that: In the left-right direction, there are at least two second protruding ribs between the first connecting column and the second connecting column.

7. The air duct component according to claim 4, characterized in that: It also includes a third connecting column arranged vertically, wherein the third connecting column is fixedly connected between the first tray and the second tray; The third connecting post is located at the rear end of the first tray and between the first connecting post and the second connecting post in the left-right direction; In the front-to-back direction, all of the second raised ribs are located between the third connecting column and the two connecting columns.

8. The air duct component according to claim 7, characterized in that: There are three second protruding ribs; in the left-right direction, one second protruding rib is located between the first connecting column and the third connecting column, and another second protruding rib is located between the third connecting column and the second connecting column; The third of the second raised ribs is located at the rear side of the second connecting column.

9. The air duct component according to claim 1, characterized in that: The first raised rib is a laterally extending trapezoidal plate, and a first reinforcing rib connected to the first tray is provided on the rear side of the trapezoidal plate; and / or The second raised rib is cylindrical; the circumferential side of the second raised rib is connected to a second reinforcing rib connected to the first tray; the second reinforcing rib is triangular; there are multiple second reinforcing ribs, and the multiple second reinforcing ribs are evenly and spacedly distributed along the circumferential direction of the second raised rib.

10. An air conditioner indoor unit, characterized in that: The invention comprises a casing and the air duct component according to any one of claims 1 to 9; the air duct component is installed in the casing.