Indoor unit of air conditioner

Abstract

The utility model discloses an air conditioner indoor unit which comprises a shell structure and a silencing structure, and the shell structure is provided with an air inlet, an air outlet and an air guide channel communicated between the air inlet and the air outlet. And the silencing structure is arranged on at least part of the inner wall surface of the air guide duct. According to the indoor unit of the air conditioner, the noise reduction structure is arranged on at least part of the inner wall face of the air guide duct, noise in the air guide duct can be eliminated or reduced while the aerodynamic performance of the air guide duct is not affected, and the use comfort of a user is improved.

Description

Technical Field

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

[0002] With the improvement of living standards, people have higher and higher requirements for the comfort of air conditioners. The comfort of air conditioners is not only about cooling and heating comfort, but also noise comfort is a very important indicator. Living in a noisy environment for a long time will cause damage to the auditory organs. The noise brought by air conditioners in indoor environments can also cause symptoms such as tinnitus and insomnia.

[0003] In the related art, in order to improve the noise of the air conditioner indoor unit, most of the noise reduction methods adopt changing the air duct itself and its structure to reduce noise. However, for products with a certain duct structure, parameters such as the duct profile, volute tongue, fan blade profile, inlet and outlet areas cannot be changed, and the desired noise reduction effect cannot be achieved through traditional methods. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide an air conditioner indoor unit, which can eliminate or reduce the noise in the air guide duct without affecting the aerodynamic performance of the air guide duct by arranging a silencer structure on at least a part of the inner wall surface of the air guide duct, so as to improve the user's comfort.

[0005] According to an embodiment of the utility model, the indoor unit of an air conditioner includes: a shell structure, the shell structure has an air inlet, an air outlet and an air guide duct connected between the air inlet and the air outlet; and a silencer structure, the silencer structure is arranged on at least a portion of the inner wall surface of the air guide duct.

[0006] According to the air-conditioning indoor unit of the embodiment of the utility model, by arranging a silencer structure on at least a portion of the inner wall surface of the air guide duct, the noise in the air guide duct can be eliminated or reduced without affecting the aerodynamic performance of the air guide duct, thereby improving the user's comfort.

[0007] According to some embodiments of the present utility model, the housing structure includes a shell body and a volute installed in the shell body, and the sound-absorbing structure is provided on at least a portion of the inner wall surface of the volute.

[0008] According to some embodiments of the utility model, the volute includes a front volute portion located at the front side of the fan and a rear volute portion located at the rear side of the fan, and the silencer structure is provided on the front volute portion and / or the rear volute portion.

[0009] According to some embodiments of the utility model, the shell body includes a top wall, a front panel arranged on the front side of the top wall, and a rear panel arranged on the rear side of the top wall, the air inlet is arranged on the top wall, and the sound-absorbing structure is arranged on the inner side surface of the front panel and / or the inner side surface of the rear panel.

[0010] According to some embodiments of the present utility model, the shell structure further includes an air outlet frame, and the sound-absorbing structure is provided on at least a portion of the inner wall surface of the air outlet frame.

[0011] According to some embodiments of the utility model, the silencer structure includes a silencer shell, on which are constructed a plurality of first resonance cavities and a plurality of second resonance cavities, the first resonance cavities and the second resonance cavities being independently arranged, and the first resonance cavity and the second resonance cavity being respectively used to eliminate a first frequency noise generated when the fan runs at a first speed and a second frequency noise generated when the fan runs at a second speed.

[0012] According to some embodiments of the present invention, the volume of the first resonance cavity is different from the volume of the second resonance cavity.

[0013] According to some embodiments of the utility model, the sound-absorbing structure also includes a cover plate, the inner side of the sound-absorbing shell has a plurality of criss-crossed vertical walls, the plurality of criss-crossed vertical walls form the first resonance cavity and / or the second resonance cavity opening inwardly, the cover plate covers the side of the vertical wall away from the sound-absorbing shell, a plurality of sound-absorbing holes are constructed on the cover plate, at least one of the sound-absorbing holes is arranged corresponding to the first resonance cavity, and at least one of the sound-absorbing holes is arranged corresponding to the second resonance cavity.

[0014] According to some embodiments of the present invention, a plurality of sound-absorbing walls are constructed on the cover plate, and the sound-absorbing walls are connected to the outer peripheral wall of the sound-absorbing hole and extend toward a direction close to the first resonance cavity or the second resonance cavity.

[0015] According to some embodiments of the present invention, at least two of the plurality of sound-absorbing holes have different diameters; and / or at least two of the plurality of sound-absorbing walls have different lengths.

[0016] According to some embodiments of the present invention, at least two of the plurality of silencer holes have different diameters and / or lengths.

[0017] According to some embodiments of the present invention, the silencer structure is integrally formed on the inner wall surface of the air guide duct.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a front view of an air conditioner indoor unit according to some embodiments of the utility model;

[0021] Figure 2 yes Figure 1 A bottom view of an indoor unit of an air conditioner;

[0022] Figure 3 yes Figure 1 A three-dimensional diagram of an indoor unit of an air conditioner;

[0023] Figure 4 yes Figure 1 A cross-sectional view of an indoor unit of an air conditioner;

[0024] Figure 5 is a top view of a sound-absorbing structure according to some embodiments of the utility model;

[0025] Figure 6 yes Figure 5 A top cross-sectional view of the sound-absorbing structure in FIG.

[0026] Figure 7 yes Figure 5 The front cross-sectional view of the sound-absorbing structure in FIG.

[0027] Reference numerals:

[0028] 100. Air conditioner indoor unit; 101. Fan; 102. Heat exchanger;

[0029] 10. Shell structure; 11. Air inlet; 12. Air outlet; 13. Air guide duct; 14. Shell body; 141. Top wall; 142. Front panel; 143. Rear panel; 15. Volute; 151. Front volute part; 152. Rear volute part; 16. Air outlet frame;

[0030] 20. Silencing structure; 21. Silencing shell; 211. First resonance cavity; 212. Second resonance cavity; 213. Vertical wall; 22. Cover plate; 221. Silencing hole; 222. Silencing wall. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0033] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] Reference below Figure 1-Figure 7 An air conditioner indoor unit 100 according to an embodiment of the present invention is described.

[0035] Reference Figure 1-Figure 7 According to the air conditioner indoor unit 100 of the embodiment of the utility model, the housing structure 10 includes an air inlet 11, an air outlet 12 and an air guide duct 13, and the air guide duct 13 is connected between the air inlet 11 and the air outlet 12. The airflow can enter the air guide duct 13 through the air inlet 11, and then flow out of the air guide duct 13 through the air outlet 12. In this process, the airflow will generate noise in the air guide duct 13, and the user experience is poor.

[0036] Specifically, the air conditioner indoor unit 100 includes a fan 101 and a heat exchanger 102, both of which are arranged in the shell structure 10, and the wind wheel and the heat exchanger 102 are arranged in the air guide duct 13. The fan 101 drives the airflow to enter the shell structure 10 through the air inlet 11, and after heat exchange in the heat exchanger 102, it flows into the room through the air outlet 12, so as to adjust the indoor temperature. The fan 101 will produce abnormal noise when driving the airflow, and when the airflow passes through the heat exchanger 102, the airflow will directly hit the inner wall of the shell structure 10, forming secondary noise, which affects the user experience.

[0037] The air conditioner indoor unit 100 further includes a silencer structure 20, which is disposed on at least a portion of the inner wall surface of the air guide duct 13. The silencer structure 20 may be disposed on a portion of the inner wall surface of the air guide duct 13, or may be disposed on the entire inner wall surface of the air guide duct 13. Designers may design the silencer structure 20 based on their own air conditioner indoor unit products, which will not be described in detail here. By disposing the silencer structure 20 on at least a portion of the inner wall surface of the air guide duct 13, the aerodynamic performance of the air guide duct 13 will not be affected, and the noise in the air guide duct 13 may be eliminated or reduced to improve the user's comfort.

[0038] According to the air-conditioning indoor unit 100 of the embodiment of the utility model, by providing a silencer structure 20 on at least a portion of the inner wall surface of the air guide duct 13, the noise in the air guide duct 13 can be eliminated or reduced without affecting the aerodynamic performance of the air guide duct 13, thereby improving the user's comfort.

[0039] According to some embodiments of the present invention, referring to Figure 1-Figure 4 The shell structure 10 includes a shell body 14 and a volute 15. The volute 15 is installed in the shell body 14. A silencer structure 20 is provided on at least a portion of the inner wall surface of the volute 15. The silencer structure 20 may be provided on a portion of the inner wall surface of the volute 15, or may be provided on the inner wall surface of the entire volute 15. Designers can design it according to their own air-conditioning indoor unit products, which will not be repeated here.

[0040] When the fan 101 drives the airflow after heat exchange in the heat exchanger 102 to flow to the air outlet 12, the airflow will flow through the volute 15, and the airflow flowing through the volute 15 will directly hit the inner wall surface of the volute 15, generating noise. A silencer structure 20 is provided on at least a portion of the inner wall surface of the volute 15, which can directly eliminate or reduce the noise generated when the airflow flows through the volute 15.

[0041] According to some embodiments of the present invention, referring to Figure 4 The volute 15 includes a front volute portion 151 and a rear volute portion 152, wherein the front volute portion 151 is located at the front side of the fan 101, and the rear volute portion 152 is located at the rear side of the fan 101. A sound-absorbing structure 20 is provided on the front volute portion 151; or, a sound-absorbing structure 20 is provided on the rear volute portion 152; or, a sound-absorbing structure 20 is provided on both the front volute portion 151 and the rear volute portion 152.

[0042] The airflow after heat exchange in the heat exchanger 102 will be blown from between the front volute 151 and the rear volute 152 to the air outlet 12, and the airflow will directly hit the inner wall surface of the front volute 151 and the rear volute 152, generating noise. The noise reduction structure 20 is provided on the front volute 151 and / or the rear volute 152, which can directly eliminate or reduce the noise generated by the airflow hitting the inner wall surface of the front volute 151 and the rear volute 152.

[0043] According to some embodiments of the present invention, referring to Figure 1-Figure 4 The shell body 14 includes a top wall 141, a front panel 142 and a rear panel 143. The front panel 142 is arranged on the front side of the top wall 141, the rear panel 143 is arranged on the rear side of the top wall 141, and the air inlet 11 is arranged on the top wall 141. The inner side surface of the front panel 142 is provided with a sound absorbing structure 20; or the inner side surface of the rear panel 143 is provided with a sound absorbing structure 20; or the inner side surface of the front panel 142 and the inner side surface of the rear panel 143 are both provided with a sound absorbing structure 20.

[0044] The fan 101 generates noise when driving the airflow, and when the airflow passes through the heat exchanger 102, the airflow directly hits the inner side of the front panel 142 and the inner side of the rear panel 143, forming secondary noise, which affects the user experience. By providing a silencer structure 20 on the inner side of the front panel 142 and / or the inner side of the rear panel 143, the silencer structure 20 can absorb the noise, thereby reducing or eliminating the noise, thereby improving the user experience.

[0045] According to some embodiments of the present invention, referring to Figure 1-Figure 4 The shell structure 10 also includes an air outlet frame 16, and a silencer structure 20 is provided on at least a portion of the inner wall surface of the air outlet frame 16. The silencer structure 20 may be provided on a portion of the inner wall surface of the air outlet frame 16, or may be provided on the entire inner wall surface of the air outlet frame 16. Designers can design it according to their own air conditioner indoor unit products, which will not be repeated here.

[0046] The air outlet 12 is located on the air outlet frame 16. When the airflow after heat exchange flows out of the air guide duct 13 from the air outlet 12, the airflow will hit the air outlet frame 16, and noise will be generated at the air outlet 12. By providing a silencer structure 20 on at least a portion of the inner wall surface of the air outlet frame 16, the silencer structure 20 can directly absorb or eliminate the noise, so as to reduce or eliminate the noise of the airflow passing through the air outlet 12.

[0047] According to some embodiments of the present invention, referring to Figure 1-Figure 7The muffler structure 20 includes a muffler housing 21, and a plurality of first resonance cavities 211 and a plurality of second resonance cavities 212 are constructed on the muffler housing 21. The first resonance cavities 211 and the second resonance cavities 212 are independently arranged. The first resonance cavities 211 are used to eliminate the first frequency noise generated when the fan 101 is running at a first speed, and the second resonance cavities 212 are used to eliminate the second frequency noise generated when the fan 101 is running at a second speed. Therefore, the muffler structure 20 no longer only reduces noise of a single frequency, but is conducive to eliminating noise of different frequencies generated at different speeds of the fan 101, so as to eliminate as many different noises generated when the fan 101 is running as possible, and the noise reduction effect is better.

[0048] The fan 101 can drive the air flow when it is running. When the air flow flows, it will hit the inner wall surface of the front volute part 151 or the rear volute part 152, and may also hit the front panel 142 or the rear panel 143, and may also hit the air outlet frame 16, thereby generating noise.

[0049] The first resonance cavity 211 and the second resonance cavity 212 may be provided on at least a portion of the inner wall surface of the air guide duct 13, on at least a portion of the inner wall surface of the volute 15, on the front volute portion 151 and / or the rear volute portion 152, on the inner side surface of the front panel 142 and / or the inner side surface of the rear panel 143, or on at least a portion of the air outlet frame 16.

[0050] The first frequency noise can enter the first resonance cavity 211, causing the first frequency noise to oscillate inside the first resonance cavity 211, thereby weakening or eliminating the energy of the sound wave of the first frequency noise itself. The sound wave propagates and reflects in the first resonance cavity 211, causing the movement of air molecules in the first resonance cavity 211. The internal friction of the air causes the internal energy inside the first resonance cavity 211 to increase, thereby consuming the mechanical energy of the sound wave, achieving the purpose of weakening or eliminating the sound, which can effectively reduce the noise value during the operation of the air conditioner indoor unit 100 and improve the user's comfort.

[0051] The second frequency noise can enter the second resonance cavity 212, causing the second frequency noise to oscillate inside the second resonance cavity 212, thereby weakening or eliminating the energy of the sound wave of the second frequency noise itself. The sound wave propagates and reflects in the second resonance cavity 212, causing the movement of air molecules in the second resonance cavity 212. The internal friction of the air causes the internal energy inside the second resonance cavity 212 to increase, thereby consuming the mechanical energy of the sound wave, achieving the purpose of weakening or eliminating the sound, which can effectively reduce the noise value during the operation of the air conditioner indoor unit 100 and improve the user's comfort.

[0052] According to some embodiments of the present invention, referring to Figure 1-Figure 7The volume of the first resonance cavity 211 is different from the volume of the second resonance cavity 212. The different volumes can eliminate noises of different sound wave frequencies, so as to eliminate as many different noises generated by the fan 101 when it is running as possible.

[0053] According to some embodiments of the present invention, referring to Figure 1-Figure 7 The sound-absorbing structure 20 also includes a cover plate 22. The inner side of the sound-absorbing shell 21 has a plurality of criss-cross vertical walls 213. The plurality of criss-cross vertical walls 213 form a first resonance cavity 211 and / or a second resonance cavity 212 that are open toward the inside. Two adjacent first resonance cavities 211 can be separated by the vertical walls 213, and two adjacent second resonance cavities 212 can be separated by the vertical walls 213. Adjacent first resonance cavities 211 and second resonance cavities 212 can be separated by the vertical walls 213, so that the design of the first resonance cavity 211 and / or the second resonance cavity 212 is simpler and more reliable.

[0054] The cover plate 22 covers the side of the vertical wall 213 away from the muffler housing 21. The cover plate 22 is configured with a plurality of muffler holes 221. At least one muffler hole 221 is arranged corresponding to the first resonance cavity 211. It can be that one muffler hole 221 is arranged corresponding to the first resonance cavity 211, or that multiple muffler holes 221 are arranged corresponding to the first resonance cavity 211, that is, one or more muffler holes 221 can be arranged on the first resonance cavity 211. At least one muffler hole 221 is arranged corresponding to the second resonance cavity 212. It can be that one muffler hole 221 is arranged corresponding to the second resonance cavity 212, or that multiple muffler holes 221 are arranged corresponding to the second resonance cavity 212, that is, one or more muffler holes 221 can be arranged on the second resonance cavity 212.

[0055] The first frequency noise can enter the first resonance cavity 211 through a muffler hole 221, and oscillate in the first resonance cavity 211, thereby weakening or eliminating the energy of the sound wave of the first frequency noise. The first frequency noise can also enter the first resonance cavity 211 through multiple muffler holes 221 at the same time, and oscillate in the first resonance cavity 211, thereby weakening or eliminating the energy of the sound wave of the first frequency noise.

[0056] The second frequency noise can enter the second resonance cavity 212 through a muffler hole 221, and oscillate in the second resonance cavity 212, thereby weakening or eliminating the energy of the sound wave of the second frequency noise. The second frequency noise can also enter the second resonance cavity 212 through multiple muffler holes 221 at the same time, and oscillate in the second resonance cavity 212, thereby weakening or eliminating the energy of the sound wave of the second frequency noise.

[0057] In a specific example, referring to Figure 5-Figure 7, a plurality of silencer holes 221 may be provided on each of the first resonance cavities 211, and the plurality of silencer holes 221 are arranged in a determinant manner on the cover plate 22. The silencer holes 221 on a first resonance cavity 211 may be arranged in two rows and two columns, and the silencer holes 221 on a first resonance cavity 211 are sequentially connected to form a rectangle. A plurality of silencer holes 221 may be provided on each of the second resonance cavities 212, and the plurality of silencer holes 221 are arranged in a determinant manner on the cover plate 22. The silencer holes 221 on a second resonance cavity 212 may be arranged in two rows and two columns, and the silencer holes 221 on a second resonance cavity 212 are sequentially connected to form a rectangle.

[0058] According to some embodiments of the present invention, referring to Figure 1-Figure 7 A plurality of sound-absorbing walls 222 are constructed on the cover plate 22. The sound-absorbing walls 222 are connected to the outer peripheral wall of the sound-absorbing hole 221 and extend toward the direction close to the first resonance cavity 211 or the second resonance cavity 212. When the first frequency noise can enter the first resonance cavity 211 through the sound-absorbing hole 221, and the second frequency noise can enter the second resonance cavity 212 through the sound-absorbing hole 221, the noise can generate viscous damping on the inner wall surface of the sound-absorbing wall 222, converting the sound energy into heat energy. When the resonant frequency of the sound is reached in the first resonance cavity 211 and the second resonance cavity 212, the movement in the sound-absorbing wall 222 is the most intense, the energy dissipation is the largest, and the sound-absorbing effect is the most obvious at this time.

[0059] According to some embodiments of the present invention, referring to Figure 1-Figure 7 , the diameters of at least two of the multiple silencer holes 221 are different; the lengths of at least two of the multiple silencer walls 222 are different.

[0060] The volumes of the first resonance cavity 211 and the second resonance cavity 212 and the number and diameter of the silencer holes 221 and the length of the silencer walls 222 are designed according to the required sound absorption frequency, and combined optimization is performed on this basis to eliminate and reduce noises of different frequencies.

[0061] For example, the diameters of the multiple silencing holes 221 on a first resonance cavity 211 are the same, and the lengths of the multiple silencing walls 222 are also the same. The diameters of the multiple silencing holes 221 on a second resonance cavity 212 are the same, and the lengths of the multiple silencing walls 222 are also the same.

[0062] According to some embodiments of the present invention, referring to Figure 1-Figure 7 The silencer structure 20 is integrally formed on the inner wall surface of the air guide duct 13. The silencer structure 20 can be added on the basis of the existing air guide duct 13 without affecting the flow of air in the air guide duct 13, and can also eliminate or reduce noise.

[0063] In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" or "some examples" etc. 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 can be combined in any one or more embodiments or examples in a suitable manner.

[0064] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air conditioner indoor unit, characterized in that: include: A shell structure, the shell structure having an air inlet, an air outlet, and an air guide duct connected between the air inlet and the air outlet; A sound-absorbing structure, the sound-absorbing structure being arranged on at least a portion of the inner wall surface of the air-guiding duct; The shell structure further includes an air outlet frame, and the sound-absorbing structure is arranged on at least a portion of the inner wall surface of the air outlet frame.

2. The air conditioner indoor unit according to claim 1, characterized in that: The housing structure comprises a housing body and a volute installed in the housing body, and the sound-absorbing structure is arranged on at least a part of the inner wall surface of the volute.

3. The air conditioner indoor unit according to claim 2, characterized in that: The volute comprises a front volute portion located at the front side of the fan and a rear volute portion located at the rear side of the fan, and the silencer structure is arranged on the front volute portion and / or the rear volute portion.

4. The air conditioner indoor unit according to claim 2, characterized in that: The shell body includes a top wall, a front panel arranged on the front side of the top wall, and a rear panel arranged on the rear side of the top wall. The air inlet is arranged on the top wall, and the inner side surface of the front panel and / or the inner side surface of the rear panel are provided with the sound-absorbing structure.

5. The air conditioner indoor unit according to any one of claims 1 to 4, characterized in that: The silencer structure includes a silencer shell, on which a plurality of first resonance cavities and a plurality of second resonance cavities are constructed. The first resonance cavities and the second resonance cavities are independently arranged, and the first resonance cavities and the second resonance cavities are respectively used to eliminate a first frequency noise generated when the fan runs at a first speed and a second frequency noise generated when the fan runs at a second speed.

6. The air conditioner indoor unit according to claim 5, characterized in that: The volume of the first resonant cavity is different from the volume of the second resonant cavity.

7. The air conditioner indoor unit according to claim 5, characterized in that: The sound-absorbing structure also includes a cover plate, and the inner side of the sound-absorbing shell has a plurality of criss-cross vertical walls, and the plurality of criss-cross vertical walls form the first resonance cavity and / or the second resonance cavity opening inwardly, and the cover plate covers the side of the vertical wall away from the sound-absorbing shell, and a plurality of sound-absorbing holes are constructed on the cover plate, at least one of the sound-absorbing holes is arranged corresponding to the first resonance cavity, and at least one of the sound-absorbing holes is arranged corresponding to the second resonance cavity.

8. The air conditioner indoor unit according to claim 7, characterized in that: A plurality of sound-absorbing walls are constructed on the cover plate. The sound-absorbing walls are connected to the outer peripheral wall of the sound-absorbing hole and extend toward a direction close to the first resonance cavity or the second resonance cavity.

9. The air conditioner indoor unit according to claim 8, characterized in that: The diameters of at least two of the plurality of sound-absorbing holes are different; and / or the lengths of at least two of the plurality of sound-absorbing walls are different.

10. The air conditioner indoor unit according to claim 1, characterized in that: The noise reduction structure is integrally formed on the inner wall surface of the air guide duct.

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