Silencing structure, fresh air module and air conditioner

Abstract

The embodiment of the utility model provides a noise reduction structure, a fresh air module and an air conditioner, the noise reduction structure comprises a structure body, a plurality of noise reduction sub-cavities are formed in the structure body, and any two noise reduction sub-cavities have different depths; a plurality of first through holes are formed in the surface of the structure body, and each silencing sub-cavity corresponds to the first through holes and communicates with the first through holes.

Description

Technical Field

[0001] The present application relates to the technical field of sound attenuation and noise reduction, and in particular to a sound attenuation structure, a fresh air module and an air conditioner. Background Art

[0002] During the operation of the air conditioner, when a module with a fan such as a fresh air module is running, the airflow will cause pressure pulsation on the blades, thereby generating broadband noise with a wide frequency band. The acoustic noise reduction structure in the related art usually only has a more significant noise reduction effect on a specific narrow frequency band peak noise, but has a poor noise reduction effect on continuous broadband noise, and cannot meet the broadband noise reduction and silencing needs of the air conditioner. Utility Model Content

[0003] The embodiments of the present application provide a sound-absorbing structure, a fresh air module and an air conditioner, which can achieve better sound-absorbing and noise-reducing effects on noise in a wider frequency band, so that the broadband noise in the air conditioner can be effectively controlled, thereby improving the quieting effect of the air conditioner.

[0004] In a first aspect, an embodiment of the present application provides a sound-absorbing structure, including a structural body, wherein a plurality of sound-absorbing sub-cavities are arranged inside the structural body, and any two sound-absorbing sub-cavities have different depths; a plurality of first through holes are arranged on the surface of the structural body, and each sound-absorbing sub-cavity is respectively arranged corresponding to and connected to a plurality of the first through holes.

[0005] In some embodiments, the structural body includes: a silencer having two side surfaces relatively arranged, wherein a groove is provided on one side surface, and a plurality of first through holes are provided on the other side surface, and the plurality of first through holes are respectively connected to the grooves; an insert part embedded in the groove to enclose the silencer together with the silencer to form the plurality of silencer sub-cavities.

[0006] In some embodiments, the side of the insert facing the bottom surface of the groove has multiple surface areas, each surface area is arranged corresponding to a plurality of first through holes; the distances between different surface areas and the bottom surface of the groove are not equal, and each silencer sub-cavity is formed between one of the surface areas and the bottom surface of the groove.

[0007] In some embodiments, the insert has a step surface structure on one side of the bottom surface of the groove, the step surface structure has multiple step surfaces arranged in sequence, and each step surface of the step surface structure is one of the surface areas.

[0008] In some embodiments, a side of the insert facing the bottom surface of the groove has a slope structure, and the slope structure and the bottom surface of the groove are inclined.

[0009] In some embodiments, a plurality of second through holes are disposed on the surface area, a cavity is disposed on a surface of the insert away from the first through holes, and the plurality of second through holes are respectively connected to the cavity.

[0010] In some embodiments, the sound-absorbing structure further includes a first sound-absorbing material layer, and the first sound-absorbing material layer is filled in the cavity.

[0011] In some embodiments, a plurality of recessed portions are provided on a surface of one side of the insert facing the bottom wall of the groove, any two of the recessed portions have different depths, each silencer sub-cavity is formed between the bottom surface of one of the recessed portions and the bottom surface of the groove, and the spacings between the bottom surfaces of different recessed portions and the bottom surface of the groove are not equal.

[0012] In some embodiments, the sound-absorbing structure further includes a second sound-absorbing material layer, and the second sound-absorbing material layer is filled in the sound-absorbing sub-cavity.

[0013] In a second aspect, an embodiment of the present application provides a fresh air module, comprising a module housing and a sound-absorbing structure provided in any one of the above embodiments, wherein the sound-absorbing structure is arranged in the module housing.

[0014] In a third aspect, an embodiment of the present application provides an air conditioner, comprising the fresh air module provided in the above embodiment.

[0015] The embodiment of the present application arranges a plurality of silencer sub-cavities with different depths on the structural body. The silencer sub-cavities with different depths have different resonance frequencies and can absorb noises of different frequency bands. In this way, the silencer structure can utilize the silencer sub-cavity with larger depth to absorb low-frequency noise, and utilize the silencer sub-cavity with smaller depth to absorb high-frequency noise, so that the silencer structure can absorb and eliminate noises of a wider frequency band, effectively control the broadband noise caused by, for example, the operation of the fan in the air conditioner, reduce the operating noise of the air conditioner and improve the quieting effect of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 is an exploded structural diagram of the sound-absorbing structure provided by some embodiments of the present application in a use state;

[0018] Figure 2 is an axonometric structural diagram of an embedded part of a sound-absorbing structure provided in some embodiments of the present application;

[0019] Figure 3 is a cross-sectional structural diagram of a sound-absorbing structure provided in some embodiments of the present application;

[0020] Figure 4 is an axonometric structural diagram of another embedding component of the sound-absorbing structure provided in some embodiments of the present application in a top view;

[0021] Figure 5 is an axonometric structural diagram of another embedding component of the sound-absorbing structure provided in some embodiments of the present application when viewed from a bottom perspective;

[0022] Figure 6 is an axonometric structural diagram of another kind of inserting member of the sound-absorbing structure provided by some embodiments of the present application in a top view;

[0023] Figure 7 is another cross-sectional structural diagram of the sound-absorbing structure provided in some embodiments of the present application;

[0024] Figure 8 It is an exploded structural diagram of the fresh air module provided in some embodiments of the present application.

[0025] Description of main component symbols:

[0026] 1-silencing structure, 10-silencing member, 11-groove, 12-first through hole, 20-embedded member, 21-step surface structure, 211-surface area, 212-second through hole, 22-cavity, 23-recessed portion, 30-silencing sub-cavity, 2-module housing, 201-air inlet cavity, 202-volute, 203-filter rack, 3-fresh air fan. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, 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. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0029] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0030] The use of "suitable for" or "configured to" in this application is meant to be open and inclusive language, which does not exclude devices that are suitable for or configured to perform additional tasks or steps. In addition, the use of "based on" is meant to be open and inclusive, because the process, step, calculation or other action "based on" one or more stated conditions or values ​​can be based on additional conditions or values ​​beyond the stated values ​​in practice.

[0031] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present application.

[0032] like Figures 1 to 3 As shown, in the first aspect, the embodiment of the present application provides a sound-absorbing structure 1, which can achieve a better sound-absorbing and noise-reducing effect on noise in a wider frequency band, so that the broadband noise in the air conditioner can be effectively controlled, thereby improving the quiet effect of the air conditioner.

[0033] The sound-absorbing structure 1 includes a structural body, and a plurality of sound-absorbing sub-cavities are arranged inside the structural body, and any two sound-absorbing sub-cavities 30 have different depths. Here, two adjacent sound-absorbing sub-cavities 30 can be isolated from each other or kept in communication, and the embodiment of the present application does not limit this. A plurality of first through holes 12 are arranged on the surface of the structural body, and each sound-absorbing sub-cavity 30 is respectively arranged and connected with a plurality of first through holes 12. Here, the depth direction of the sound-absorbing sub-cavity 30 can be the direction from the first through hole 12 to the bottom of the sound-absorbing sub-cavity 30.

[0034] Here, the muffler sub-cavities 30 of different depths have different resonance frequencies and can absorb noises of different frequency bands. If the depth of the muffler sub-cavity 30 is large, the resonance frequency of the muffler sub-cavity 30 is small, and the muffler sub-cavity 30 can better absorb low-frequency noise; if the depth of the muffler sub-cavity 30 is small, the resonance frequency of the muffler sub-cavity 30 is large, and high-frequency noise can be better absorbed.

[0035] In this way, the silencer structure 1 provided in the embodiment of the present application can utilize the silencer sub-cavity 30 with a larger depth to absorb low-frequency noise, and utilize the silencer sub-cavity 30 with a smaller depth to absorb high-frequency noise, thereby being able to absorb and eliminate noise in a wider frequency band, so that the broadband noise caused by, for example, fan operation in the air conditioner can be effectively controlled, thereby reducing the operating noise of the air conditioner and improving the quieting effect of the air conditioner.

[0036] In some embodiments, the muffler structure 1 may include a muffler 10 and an insert 20. The muffler 10 has two side surfaces that are arranged opposite to each other, wherein a groove 11 is provided on one side surface, and the aforementioned multiple first through holes 12 are provided on the other side surface, and the multiple first through holes 12 are respectively connected to the groove 11. Here, the first through holes 12 penetrate the side wall of the muffler 10 from the surface of the muffler 10, and then extend to the bottom surface of the groove 11 and connect with the groove 11. The shape of the muffler 10 can be determined according to actual needs, and can be, for example, sheet-shaped, block-shaped, etc., which is not limited in the embodiments of the present application.

[0037] The insert 20 is embedded in the groove 11 to enclose the muffler 10 to form the above-mentioned multiple muffler sub-cavities 30. The shape of the insert 20 can be determined according to actual needs, and can be, for example, a sheet or block, etc., which is not limited in the embodiment of the present application. Here, the depth direction of the muffler sub-cavity 30 is the direction from the first through hole 12 to the insert 20.

[0038] The specific shape of the insert 20 can be set according to actual needs, so as to form multiple silencer sub-cavities 30 with different depths between the insert and the silencer 10, and the embodiment of the present application is not limited to this. In some embodiments, the insert 20 may have multiple surface areas 211 on one side facing the bottom surface of the groove 11, and each surface area 211 is correspondingly arranged with a plurality of first through holes 12. Here, the spacing between different surface areas 211 and the bottom surface of the groove 11 is not equal, and each silencer sub-cavity 30 is formed between one of the above-mentioned surface areas 211 and the bottom surface of the groove 11.

[0039] In this way, a muffler sub-cavity 30 is formed between each of the surface regions 211 and the bottom surface of the groove 11, and the depth of the muffler sub-cavity 30 is the distance between the corresponding surface region 211 and the bottom surface of the groove 11. Since the distances between different surface regions 211 and the bottom surface of the groove 11 are not equal, the depths of the muffler sub-cavities 30 corresponding to different surface regions 211 are also different.

[0040] The surface shape of one side of the bottom surface of the insert 20 facing the groove 11 can be set according to actual needs, and can be, for example, a step surface, a slope surface, a continuously bent surface or other special-shaped curved surface types, which is not limited in the embodiment of the present application. Figure 2 and Figure 3 As shown, in some examples, the side of the insert 20 facing the bottom surface of the groove 11 may have a step surface structure 21, and the step surface structure 21 has multiple step surfaces arranged in sequence; each step surface of the step surface structure 21 is a surface area 211, which can ensure that the spacing between different surface areas 211 and the bottom surface of the groove 11 is not equal. The number of surface steps of the step surface structure 21 can be determined according to actual needs, and the embodiment of the present application is not limited to this.

[0041] In other examples, the side of the insert 20 facing the bottom surface of the groove 11 may have a slope structure, and the slope structure and the bottom surface of the groove 11 are arranged at an angle. Accordingly, the slope structure can be divided into the above-mentioned multiple surface areas 211 in sequence along its slope direction, so that the distances between different surface areas 211 and the bottom surface of the groove 11 are not equal.

[0042] like Figure 4 and Figure 5As shown, illustratively, a plurality of second through holes 212 may be provided on the surface area 211; a cavity 22 is provided on the surface of the insert 20 on one side away from the first through hole 12, and the plurality of second through holes 212 are respectively connected to the cavity 22. illustratively, a plurality of second through holes 212 may be provided only on part of the surface area 211, while no second through holes 212 may be provided on the remaining surface area 211; illustratively, a plurality of second through holes 212 may be provided on each surface area 211. In this way, another level of resonant silencing cavity may be formed in the cavity 22; when there is noise that cannot be completely absorbed by the silencing sub-cavity 30, the part of the noise may pass through the second through holes 212 and enter the cavity 22, and then be eliminated in the cavity 22 by resonant silencing.

[0043] Exemplarily, the sound-absorbing structure 1 may further include a first sound-absorbing material layer, which is filled in the cavity 22. The material of the first sound-absorbing material layer can be determined according to actual needs, and can be a flexible material type such as sponge, cotton cloth, knitted cotton, etc., which is not limited in the embodiment of the present application. By filling the first sound-absorbing material layer in the cavity 22, the first sound-absorbing material layer can be used to absorb the noise entering the cavity 22, thereby further improving the sound-absorbing and noise-reducing effect.

[0044] like Figure 6 and Figure 7 As shown, in some examples, a plurality of recessed portions 23 may be provided on the surface of one side of the insert 20 facing the bottom wall of the groove 11. Any two recessed portions 23 have different depths, and each muffler sub-cavity 30 is formed between the bottom surface of a recessed portion 23 and the bottom surface of the groove 11, and the spacings between the bottom surfaces of different recessed portions 23 and the bottom surfaces of the groove 11 are not equal. Accordingly, the depth of the muffler sub-cavity 30 is the spacing between the bottom surface of the corresponding recessed portion 23 and the bottom surface of the groove 11. Since the recessed portions 23 have different depths, and the spacings between the bottom surfaces of different recessed portions 23 and the bottom surfaces of the groove 11 are not equal, the depths of the muffler sub-cavities 30 corresponding to different recessed portions 23 are also different.

[0045] The formation method of the recessed portion 23 can be determined according to actual needs, and the embodiment of the present application does not limit this. In some examples, a plurality of transverse ribs can be arranged on the side of the insert 20 facing the bottom wall of the groove 11, and the plurality of transverse ribs are arranged crisscross to form a plurality of grooves 11 having a grid shape.

[0046] In some examples, one side of the insert 20 facing the bottom wall of the groove 11 may be disposed in contact with the bottom surface of the groove 11. In other embodiments, one side of the insert 20 facing the bottom wall of the groove 11 may be disposed spaced from the bottom surface of the groove 11.

[0047] In some embodiments, the sound-absorbing structure 1 may further include a second sound-absorbing material layer, which is filled in the sound-absorbing sub-cavity 30. The material of the second sound-absorbing material layer can be determined according to actual needs, and can be a flexible material type such as sponge, cotton cloth, knitted cotton, etc., which is not limited in the embodiment of the present application. By filling the second sound-absorbing material layer in the sound-absorbing sub-cavity 30, the second sound-absorbing material layer can be used to absorb the noise entering the sound-absorbing sub-cavity 30, thereby further improving the sound-absorbing and noise-reducing effect.

[0048] like Figure 8 As shown, in the second aspect, an embodiment of the present application provides a fresh air module, which includes a module housing 2 and a silencing structure 1 provided in any of the above embodiments, and the silencing structure 1 is arranged in the module housing 2. Since the fresh air module has the above silencing structure 1, it can achieve a better silencing and noise reduction effect on noise in a wider frequency band, and effectively control the broadband noise problem when the fan is running.

[0049] The structure of the module housing 2 can be determined according to actual needs, and the embodiments of the present application are not limited thereto. In some examples, the module housing 2 may include an air inlet chamber 201 and a volute 202, and the fresh air module may include a fresh air fan 3; the muffler structure 1 may be disposed in the air inlet chamber 201, and the fresh air fan 3 may be disposed in the volute 202. Exemplarily, the module housing 2 may also include a filter rack 203, and the filter rack 203 is disposed between the air inlet chamber 201 and the volute 202.

[0050] like Figures 1 to 8 As shown, in the third aspect, the embodiment of the present application provides an air conditioner, which includes the fresh air module provided in the above embodiment. The type of air conditioner can be determined according to actual needs, and can be, for example, a wall-mounted air conditioner, a cabinet air conditioner, a window air conditioner, etc., which is not limited in the embodiment of the present application. The air conditioner provided in the embodiment of the present application has the above-mentioned silencing structure 1, which can achieve a better silencing and noise reduction effect on noise in a wider frequency band, and effectively control the broadband noise problem.

[0051] The above is a detailed introduction to the silencer structure, fresh air module and air conditioner provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A sound-absorbing structure, characterized in that: It comprises a structural body, wherein a plurality of muffler sub-cavities are arranged inside the structural body, and any two muffler sub-cavities have different depths; a plurality of first through holes are arranged on the surface of the structural body, and each muffler sub-cavity is respectively arranged corresponding to and connected with a plurality of the first through holes.

2. The sound absorbing structure according to claim 1, characterized in that: The structural body comprises: The muffler has two oppositely disposed surfaces, one of which is provided with a groove, and the other is provided with the plurality of first through holes, the plurality of first through holes being connected to the grooves respectively; The embedding piece is embedded in the groove to enclose with the muffler piece to form the multiple muffler sub-cavities.

3. The sound absorbing structure according to claim 2, characterized in that: The insert has a plurality of surface areas on one side facing the bottom surface of the groove, and each surface area is arranged corresponding to a plurality of first through holes; the spacings between different surface areas and the bottom surface of the groove are not equal, and each silencer sub-cavity is formed between one of the surface areas and the bottom surface of the groove.

4. The sound absorbing structure according to claim 3, characterized in that: The inserting part has a step surface structure on one side facing the bottom surface of the groove. The step surface structure has multiple step surfaces arranged in sequence. Each step surface of the step surface structure is one of the surface areas.

5. The sound absorbing structure according to claim 3, characterized in that: The inserting part has a slope structure on one side facing the bottom surface of the groove, and the slope structure and the bottom surface of the groove are arranged obliquely.

6. The sound absorbing structure according to any one of claims 3 to 5, characterized in that: A plurality of second through holes are arranged on the surface area, a cavity is arranged on a surface of the inserting part which is away from the first through holes, and the plurality of second through holes are respectively connected with the cavity.

7. The sound absorbing structure according to claim 6, characterized in that: The sound-absorbing structure further includes a first sound-absorbing material layer, and the first sound-absorbing material layer is filled in the cavity.

8. The sound absorbing structure according to claim 2, characterized in that: A plurality of recessed portions are provided on the surface of one side of the insert facing the bottom wall of the groove, any two of the recessed portions have different depths, each silencer sub-cavity is formed between the bottom surface of a recessed portion and the bottom surface of the groove, and the spacings between the bottom surfaces of different recessed portions and the bottom surface of the groove are not equal.

9. The sound absorbing structure according to claim 1, characterized in that: The sound-absorbing structure further includes a second sound-absorbing material layer, and the second sound-absorbing material layer is filled in the sound-absorbing sub-cavity.

10. A fresh air module, characterized in that: The invention comprises a module housing and the sound absorbing structure according to any one of claims 1 to 9, wherein the sound absorbing structure is arranged in the module housing.

11. An air conditioner, characterized in that: Including the fresh air module described in claim 10.

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