Sound absorption unit, sound absorption module and range hood

Abstract

The utility model relates to the technical field of range hoods, and provides a sound absorption unit, a sound absorption module and a range hood. The sound absorption unit comprises a first sound absorption part, a second sound absorption part and an opening section, the first sound absorption part is provided with a first cavity, the second sound absorption part is provided with a second cavity, the first sound absorption part is connected to the second sound absorption part in an inserted mode, the first sound absorption part can stretch out, draw back and be fixed relative to the second sound absorption part, and the first cavity is communicated with the second cavity. And the opening section is connected and communicated with the first sound absorption part or the second sound absorption part. According to the sound absorption unit, the sound absorption unit is arranged to be the first sound absorption part and the second sound absorption part which are connected in the inserted mode, when the sound absorption unit is machined, the overall length of the sound absorption unit can be changed according to the telescopic length of the first sound absorption part in the second sound absorption part, and therefore the sound absorption unit can filter noise of different frequencies; the applicability of the sound absorption unit is enhanced, and repeated mold opening is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to a sound absorbing unit, a sound absorbing module and a range hood. Background Art

[0002] In the related art, when the range hood is in use, the volute will vibrate and generate noise, but since the frequency of the noise generated by the volute is different, the sound absorbing device in the range hood can only filter the noise in a fixed frequency range. The noise above 400 Hz is significantly reduced, but the reduction of the noise below 400 Hz is relatively limited. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the related art. To this end, the utility model provides a sound absorbing unit, so that the sound absorbing unit can change its own sound absorbing frequency, so as to adapt to different models of range hoods.

[0004] The utility model also provides a sound absorbing module.

[0005] The utility model also provides a range hood.

[0006] The utility model provides a sound absorbing unit, comprising:

[0007] a first sound absorbing part, the first sound absorbing part having a first cavity;

[0008] a second sound absorbing part, wherein the second sound absorbing part has a second cavity, the first sound absorbing part is plugged into the second sound absorbing part, the first sound absorbing part is retractable and fixed relative to the second sound absorbing part, and the first cavity is connected to the second cavity;

[0009] An opening section is connected to and communicated with the first sound absorbing part or the second sound absorbing part.

[0010] According to the sound absorbing unit proposed by the utility model, by arranging the sound absorbing unit into a first sound absorbing part and a second sound absorbing part which are plugged into each other, the overall length of the sound absorbing unit can be changed according to the telescopic length of the first sound absorbing part in the second sound absorbing part during processing, so that the sound absorbing unit can filter noises of different frequencies, thereby enhancing the applicability of the sound absorbing unit and avoiding repeated mold opening.

[0011] According to an embodiment of the present invention, the opening section is provided in the first sound absorbing part, and the opening section protrudes from a wall surface of the first sound absorbing part.

[0012] According to an embodiment of the present invention, the distance from the opening section to one end of the sound absorbing unit is greater than the distance from the opening section to the other end of the sound absorbing unit.

[0013] According to an embodiment of the present invention, the length of the first sound absorbing part is 100 mm-400 mm.

[0014] According to an embodiment of the present invention, the shape of the opening is circular, elliptical or polygonal.

[0015] According to an embodiment of the present invention, both ends of the sound absorbing unit are closed ends.

[0016] According to an embodiment of the present invention, one end of the sound absorbing unit is a closed end, and the other end is provided with a slit; or, both ends of the sound absorbing unit are provided with slits.

[0017] According to an embodiment of the present invention, the cross-section of the sound absorbing unit is circular, elliptical or polygonal.

[0018] The utility model also provides a sound absorbing module, comprising the above-mentioned sound absorbing unit, wherein a plurality of the sound absorbing units are detachably connected.

[0019] According to an embodiment of the present invention, a plurality of the sound absorbing units are arranged side by side.

[0020] The utility model also provides a range hood, comprising:

[0021] A housing, wherein the housing is provided with a connected air duct and a smoking port;

[0022] A volute, the volute is arranged in the housing, and the volute is communicated with the air duct;

[0023] The above-mentioned sound absorbing module is arranged in the volute.

[0024] 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

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a structural schematic diagram of the sound absorbing module provided by the utility model;

[0027] Figure 2 yes Figure 1 Rear view of the middle sound-absorbing module;

[0028] Figure 3 This is another structural schematic diagram of the sound absorbing module provided by the utility model;

[0029] Figure 4 yes Figure 3 Cross-sectional view of the middle sound-absorbing module along the AA direction;

[0030] Figure 5 It is a structural schematic diagram of the range hood provided by the utility model.

[0031] Reference numerals:

[0032] 10. Range hood; 11. Sound absorption module; 12. Shell; 13. Volute;

[0033] 100, sound absorbing unit; 110, first sound absorbing part; 111, first cavity; 112, opening section; 120, second sound absorbing part; 121, second cavity; 130, gap. DETAILED DESCRIPTION

[0034] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0035] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "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, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying 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 limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0036] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0037] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", 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 embodiment. In this specification, the schematic representations of the above terms do 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. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0039] In the related art, when the range hood is in use, various parts will vibrate and generate noise. However, since the frequency of the noise generated by the volute is different, the sound absorption device in the range hood can only filter the noise in a fixed frequency range. The noise above 400Hz is significantly reduced, but the reduction of the noise below 400Hz is relatively limited. For sound waves, the wavelength is inversely proportional to the frequency. Therefore, the lower the frequency of the sound wave, the longer its wavelength, and the less concentrated the energy. Thicker materials are needed to absorb the energy, but considering the limited size of the range hood, it is not enough to meet the low-frequency sound absorption requirements.

[0040] like Figure 1 As shown, the present invention proposes a sound absorbing unit 100, comprising a first sound absorbing portion 110, a second sound absorbing portion 120 and an opening section 112. It should be noted that when the sound absorbing unit 100 proposed by the present invention is applied to a range hood 10, it can be placed near the volute 13 of the range hood 10 to absorb the noise generated by the vibration of the volute 13, thereby reducing the noise generated when the range hood 10 is working and improving the user experience.

[0041] Specifically, Figure 4As shown, the first sound absorbing part 110 has a first cavity 111, the second sound absorbing part 120 has a second cavity 121, the first sound absorbing part 110 is plugged into the second sound absorbing part 120, and the opening section 112 is connected and communicated with the first sound absorbing part 110 or the second sound absorbing part 120. When the sound absorbing unit 100 is processed, the first sound absorbing part 110 is retractable relative to the second sound absorbing part 120. Since the effective length of the inner cavity of the sound absorbing unit 100 affects the resonant frequency of the sound absorbing unit 100, a longer inner cavity will resonate with a lower frequency, while a shorter inner cavity will resonate with a higher frequency. Therefore, according to different models of the range hood, different lengths of the sound absorbing unit 100 can be preset to filter noises of different frequencies to avoid repeated mold opening.

[0042] After determining the length of the sound absorbing unit 100, the first sound absorbing part 110 and the second sound absorbing part 120 can be fixedly connected. For example, the first sound absorbing part 110 and the second sound absorbing part 120 can be fixed by bonding or bolting to prevent the first sound absorbing part 110 and the second sound absorbing part 120 from falling off due to vibration during use. The first cavity 111 is connected to the second cavity 121. When absorbing sound, the sound waves enter the first cavity 111 and the second cavity 121 from the opening section 112, causing the sound absorbing unit 100 to vibrate. When the frequency of the noise in the sound wave matches the resonant frequency of the sound absorbing unit 100, the energy of the noise will be absorbed by the sound absorbing unit 100, reducing the propagation of the noise of these frequencies into the environment, thereby reducing the noise level of specific frequencies.

[0043] According to the sound absorbing unit 100 of the embodiment of the utility model, by configuring the sound absorbing unit 100 to be plugged into a first sound absorbing portion 110 and a second sound absorbing portion 120, the overall length of the sound absorbing unit 100 can be changed according to the telescopic length of the first sound absorbing portion 110 in the second sound absorbing portion 120 during processing, so that the sound absorbing unit 100 can filter noises of different frequencies, thereby enhancing the applicability of the sound absorbing unit 100 and avoiding repeated mold opening.

[0044] In one embodiment of the present invention, Figure 1 and Figure 4 As shown, the opening section 112 is provided in the first sound absorbing part 110, and the wall surface of the opening section 112 protrudes from the wall surface of the first sound absorbing part 110. The protruding opening section 112 can help guide the sound waves into the sound absorbing unit 100, thereby improving the efficiency of the sound waves entering the first cavity 111 and the second cavity 121. This helps to reduce the loss of sound wave energy and ensure that the energy of the sound waves is concentrated into the sound absorbing unit 100 for effective absorption. In addition, through the protruding design of the wall surface of the opening section 112, the behavior of the sound waves inside the resonance cavity can be changed, thereby generating a stronger resonance effect on the sound waves of a specific frequency, thereby improving the absorption efficiency of the sound absorbing unit 100 for noise of a specific frequency.

[0045] In one embodiment of the present invention, Figures 1 to 4 As shown, the distance from the opening section 112 to one end of the sound absorbing unit 100 is greater than the distance from the opening section 112 to the other end of the sound absorbing unit 100. In this way, the telescopic distance of the first sound absorbing portion 110 in the second sound absorbing portion 120 can be increased, thereby increasing the adjustable length range of the entire sound absorbing unit 100, thereby increasing the absorption range of the sound wave frequency of the sound absorbing unit 100, and increasing the applicability of the sound absorbing unit 100.

[0046] In some embodiments of the present invention, the length of the first sound absorbing portion 110 is 100 mm-400 mm, so that the sound absorbing unit 100 has a larger adjustment range.

[0047] like Figures 1 to 4 As shown, in some embodiments of the present invention, the shape of the opening section 112 is circular. The circular opening section 112 will produce less acoustic diffraction and reflection, which helps to improve the efficiency of sound waves entering the sound absorbing unit 100. In addition, the circular opening section 112 is relatively simple to manufacture and has a low processing cost. Of course, the shape of the opening section 112 is not limited to this. In other embodiments of the present invention, the shape of the opening section 112 can be elliptical, or the shape of the opening section 112 can also be polygonal.

[0048] like Figures 1 to 4 As shown, in some embodiments of the present invention, both ends of the sound absorbing unit 100 are closed ends. The closed-end sound absorbing unit 100 can be similar to a closed resonance cavity, and such a structure can produce a significant resonant sound absorption effect at a specific frequency. During resonance, the sound wave energy is effectively absorbed in the sound absorbing unit 100, thereby reducing the noise level. Compared with the open design, the closed sound absorbing unit 100 generally performs better in absorbing low-frequency noise. Low-frequency sound waves have a longer wavelength and are therefore more difficult to absorb. The closed-end design can increase the reflection of sound waves in the unit, and improve the low-frequency sound absorption efficiency by increasing the length of the sound wave path or forming standing waves in the closed cavity. In addition, the closed-end design can prevent sound waves from leaking out from the end of the sound absorbing unit 100, ensuring that the sound waves mainly enter through the opening section 112, so that the propagation path of the sound waves can be more effectively controlled, thereby improving the sound absorption efficiency.

[0049] Since the sound absorbing unit 100 is placed inside the housing 12 of the range hood 10, the sound absorbing unit 100 will be stained with oil during operation, and the oil inside the cavity of the sound absorbing unit 100 will affect the sound absorption effect of the sound absorbing unit 100. Figure 2As shown, in some embodiments of the present invention, one end of the sound absorbing unit 100 is a closed end, and a gap 130 is opened at the other end, so that the oil inside the cavity of the sound absorbing unit 100 can be discharged from the gap 130, thereby preventing oil from accumulating inside the cavity of the sound absorbing unit 100 and affecting the sound absorption effect of the sound absorbing unit 100.

[0050] Of course, the arrangement of the gap 130 is not limited thereto. In some other embodiments of the present invention, the gaps 130 are formed at both ends of the sound absorbing unit 100 .

[0051] like Figures 1 to 4 As shown, in some embodiments of the present invention, the cross-section of the sound absorbing unit 100 is polygonal. Of course, the cross-sectional shape of the sound absorbing unit 100 is not limited thereto. In other embodiments of the present invention, the cross-sectional shape of the sound absorbing unit 100 may be circular or elliptical.

[0052] like Figures 1 to 4 As shown, the utility model also proposes a sound absorbing module 11, including the above-mentioned sound absorbing unit 100, and multiple sound absorbing units 100 are detachably connected. Different types of sound absorbing units 100 have better absorption effects on sound waves within a specific frequency range. By combining different types of sound absorbing units 100, complex noise problems can be solved in a targeted manner and wide-band noise control can be achieved. In addition, the detachable design makes it easier to install and replace each sound absorbing unit 100. When maintenance or upgrading of the system is required, damaged or degraded sound absorbing units 100 can be replaced individually without replacing the entire sound absorbing module 11, which can reduce maintenance costs and time.

[0053] According to the sound absorbing module 11 proposed by the present invention, since it includes the above-mentioned sound absorbing unit 100, it also has the beneficial effects of the above-mentioned sound absorbing unit 100, which will not be repeated here. In addition, by combining different types of sound absorbing units 100, the sound absorbing module 11 can solve complex noise problems in a targeted manner and achieve wide-band noise control.

[0054] like Figure 1 As shown, in some embodiments of the present invention, multiple sound absorbing units 100 are arranged side by side. By arranging the sound absorbing units 100 side by side, uniform coverage of the sound field can be achieved, avoiding acoustic "dead corners". This helps to ensure that sound waves can be absorbed more evenly.

[0055] like Figure 5As shown, the utility model further proposes a range hood 10, comprising a shell 12, a volute 13 and the above-mentioned sound absorbing module 11. The shell 12 is provided with a connected air duct and a smoke inlet, the volute 13 is arranged in the shell 12, the volute 13 is connected to the air duct, the sound absorbing module 11 is arranged in the shell 12, and the sound absorbing module 11 is arranged near the volute 13. The volute 13 is the main part of the range hood 10 that generates noise when the fan is running. The sound absorbing module 11 is directly arranged near the volute 13, which can absorb noise near the sound source, thereby effectively reducing the overall noise level of the range hood 10 and improving the quiet performance of the range hood 10. Among them, the sound absorbing module 11 can be multiple groups, for example, the sound absorbing module 11 can be two groups, so as to further increase the noise absorption effect.

[0056] Finally, it should be noted that the above implementation modes are only used to illustrate the present invention, rather than to limit the present invention. Although the present invention is described in detail with reference to the embodiments, a person skilled in the art should understand that various combinations, modifications or equivalent replacements of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. A sound absorbing unit, characterized in that: include: a first sound absorbing part, the first sound absorbing part having a first cavity; a second sound absorbing part, wherein the second sound absorbing part has a second cavity, the first sound absorbing part is plugged into the second sound absorbing part, the first sound absorbing part is retractable and fixed relative to the second sound absorbing part, and the first cavity is connected to the second cavity; An opening section is connected to and communicates with the first sound absorbing part or the second sound absorbing part.

2. The sound absorbing unit according to claim 1, characterized in that: The opening section is provided on the first sound absorbing part, and the opening section protrudes from the wall surface of the first sound absorbing part.

3. The sound absorbing unit according to claim 1, characterized in that The distance from the opening section to one end of the sound absorbing unit is greater than the distance from the opening to the other end of the sound absorbing unit.

4. The sound absorbing unit according to claim 1, characterized in that: The cross section of the opening section is in the shape of a circle, an ellipse or a polygon.

5. The sound absorbing unit according to any one of claims 1 to 4, characterized in that: The length of the first sound absorbing part is 100 mm-400 mm.

6. The sound absorbing unit according to any one of claims 1 to 4, characterized in that: Both ends of the sound absorbing unit are closed ends.

7. The sound absorbing unit according to any one of claims 1 to 4, characterized in that: One end of the sound absorbing unit is a closed end, and the other end is provided with a slit; or, both ends of the sound absorbing unit are provided with slits.

8. The sound absorbing unit according to any one of claims 1 to 4, characterized in that: The cross section of the sound absorbing unit is circular, elliptical or polygonal.

9. A sound absorbing module, characterized in that: The invention comprises a plurality of sound absorbing units according to any one of claims 1 to 8, wherein the plurality of sound absorbing units are detachably connected.

10. The sound absorbing module according to claim 9, characterized in that: A plurality of the sound absorbing units are arranged side by side.

11. A range hood, characterized in that: include: A housing, wherein the housing is provided with a connected air duct and a smoking port; A volute, the volute is arranged in the housing, and the volute is communicated with the air duct; The sound absorbing module according to any one of claims 9 to 10 is arranged in the shell.

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