Silencing device and humidifier with same

Abstract

The utility model provides a silencing device and a humidifier with the silencing device, and the silencing device comprises a shell, a silencer, a silencer and a control module, the silencing structure is arranged in the containing cavity and comprises a silencing pipe and partition plates, the silencing pipe and the partition plates are of an integrated structure, the two ends of the silencing pipe communicate with the outside correspondingly, the partition plates are arranged on the periphery of the silencing pipe so as to divide the containing cavity into a plurality of mutually-independent resonant cavities, and the silencing pipe is arranged in the multiple resonant cavities in a penetrating mode. A communicating structure is arranged on the pipe section, corresponding to each resonant cavity, of the hush pipe, and the hush pipe communicates with the multiple resonant cavities through the communicating structures. By means of the technical scheme, the problems that in the prior art, a silencing device is complex in structure and single in noise reduction effect can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cell systems, in particular to a muffler device and a humidifier having the same. Background Art

[0002] At present, hydrogen fuel cell system is an emerging industry. Hydrogen fuel cell system is a device that generates electricity through the electrochemical reaction of hydrogen and oxygen. The oxygen required by the fuel cell system is obtained from the air by the air compressor. The air compressed by the air compressor has a high pressure. This high-pressure air will produce high airflow noise when passing through a complex humidifier. The main sources of noise in the power generation process of the fuel cell system are the radiation noise of the various components of the intake path and the exhaust radiation noise after the reaction.

[0003] Verification shows that, apart from the air compressor, the noise radiated by the humidifier body and the connecting pipes before and after the humidifier are the main noise sources of the air path, which has affected the further improvement of the noise level of the fuel cell system and needs to be reduced. The noise radiated by the humidifier body can be enhanced by increasing the dynamic stiffness value of the humidifier panel to enhance the humidifier body's ability to resist radiation noise. For the convenience of connection, the connecting pipes before and after the humidifier generally use rubber tubes, which are difficult to enhance the ability to resist radiation noise by increasing the dynamic stiffness of the panel. However, the rubber tube has a weak ability to resist radiation noise and is one of the main sources of radiation noise in the fuel cell system.

[0004] In the prior art, usually a method of wrapping the pipeline with acoustic materials is adopted, or an additional silencer is provided on the outside of the humidifier to silence the noise at the air inlet or outlet of the humidifier. The sound-absorbing material used for wrapping traditionally has a relatively single coverage range of the sound-absorbing material's sound-absorbing frequency, and the sound-absorbing effect on the humidifier is not ideal. If complex wrapping materials are used, such as sound-absorbing and sound-insulating combinations, it will bring higher wrapping costs, resulting in the phenomenon of "the skin is more expensive than the filling." The fuel cell system is very compact in structural design, and the space for arranging the silencer at the front and rear ends of the humidifier is relatively small. In addition, the internal structure of most silencers is relatively complex, which is very inconvenient to assemble in the already small installation space. Utility Model Content

[0005] The utility model provides a muffler and a humidifier having the same, so as to solve the problems that the muffler in the prior art has a complex structure and a relatively single noise reduction effect.

[0006] According to one aspect of the present utility model, a silencing device is provided. The silencing device includes: a housing having a receiving cavity; a silencing structure disposed in the receiving cavity. The silencing structure includes a silencing tube and a partition. The silencing tube and the partition are an integral structure. Both ends of the silencing tube communicate with the outside respectively. The partition is disposed on the outer periphery of the silencing tube to divide the receiving cavity into a plurality of mutually independent resonance cavities. The silencing tube passes through the plurality of resonance cavities, and a communication structure is provided on the tube section of the silencing tube corresponding to each resonance cavity. The silencing tube communicates with the plurality of resonance cavities respectively through the communication structure.

[0007] Further, the silencing tube includes a first section and a second section arranged in sequence. There is a gap between the first section and the second section, and the gap forms the communication structure.

[0008] Further, one end of the second section away from the first section has a tapered section, and the diameter of the tapered section gradually increases in the direction away from the first section.

[0009] Further, the second section and the housing are an integral structure.

[0010] Further, the housing includes a cover body and a sealing cover. The cover body has a receiving cavity. The cover body has a first opening and a second opening arranged oppositely. The sealing cover seals the first opening. The silencing tube has an air inlet and an air outlet arranged oppositely. The air inlet is located on the sealing cover, and the air outlet communicates with the second opening.

[0011] Further, a connection structure is provided at the end of the cover body where the first opening is located, and the connection structure is used for installing the silencing device.

[0012] Further, there is an included angle between the extending direction of the air inlet of the silencing tube and the extending direction of the air outlet of the silencing tube.

[0013] Further, the communication structure includes silencing holes, and the silencing holes are annularly distributed on the silencing tube.

[0014] Further, the silencing structure includes a plurality of partitions, and the plurality of partitions are spaced along the extending direction of the silencing tube on the outer periphery of the silencing tube.

[0015] According to another aspect of the present utility model, a humidifier is provided. The humidifier includes: a main body having a fluid inlet and a fluid outlet, and the main body is used for humidifying air; a silencing device, the silencing device being the above-mentioned silencing device, the silencing device is detachably connected to the main body, the silencing device is disposed at the fluid inlet and / or the fluid outlet, and the silencing device communicates with the main body through the silencing tube.

[0016] Applying the technical solution of the present utility model, the sound-absorbing structure includes a sound-absorbing pipe and a partition. The composition of the sound-absorbing structure is simple, occupies less space, and can save the manufacturing cost of the sound-absorbing device. Moreover, the sound-absorbing structure is arranged inside the accommodation cavity, with a high degree of integration and will not affect the layout of the fuel cell system. The sound-absorbing pipe and the partition are of an integral structure, which facilitates the installation and disassembly of the sound-absorbing pipe and the partition in the accommodation cavity, and improves the convenience of assembling the housing and the sound-absorbing structure. The partition is arranged on the outer periphery of the sound-absorbing pipe to divide the accommodation cavity into a plurality of independent resonance cavities. A communication structure is arranged on the pipe section of the sound-absorbing pipe corresponding to each resonance cavity. Compared with using sound-absorbing materials for noise reduction, the technical solution of this application can adjust the center frequency of the resonance cavity by adjusting the volume of the resonance cavity, the diameter of the sound-absorbing pipe, and the flow area of the communication structure for different noise frequencies, so that the center frequency of the resonance cavity is close to or the same as the frequency of the noise, so as to cause the air in the resonance cavity to resonate, and then consume the energy of the noise to reduce the noise. In this way, the noise reduction frequency range of the sound-absorbing device can be increased, and the flexibility and applicability of the sound-absorbing device for noise reduction can be improved. And the sound-absorbing materials are prone to aging, and the subsequent maintenance cost is relatively high. The sound-absorbing device of this application will not have the problem that the material aging affects the noise reduction effect, and at the same time saves the later maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0018] Figure 1 shows an assembly schematic diagram of the sound-absorbing device and the humidifier provided by the present utility model;

[0019] Figure 2 shows a structural schematic diagram of the sound-absorbing device provided by the present utility model.

[0020] Among them, the above-mentioned accompanying drawings include the following reference numerals:

[0021] 10, housing;

[0022] 11, resonance cavity; 12, interval;

[0023] 13, cover body; 131, connection structure;

[0024] 14, sealing cover;

[0025] 15, sound-absorbing hole;

[0026] 20, sound-absorbing structure;

[0027] 21, sound-absorbing pipe;

[0028] 211, first section;

[0029] 212. Second section; 2121. Conical section

[0030] 213. Air inlet; 214. Air outlet

[0031] 22. Partition board

[0032] 300. Body

[0033] 301. Fluid inlet; 302. Fluid outlet Specific implementation mode

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way constitutes a limitation on the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] As Figure 1 and Figure 2 shown, the embodiment of the present invention provides a silencing structure and a humidifier having the same. The silencing device includes: a housing 10 and a silencing structure 20. Among them, the housing 10 has a receiving cavity. The silencing structure 20 is disposed in the receiving cavity. The silencing structure 20 includes a silencing tube 21 and a partition board 22. The silencing tube 21 and the partition board 22 are an integral structure. The two ends of the silencing tube 21 are respectively communicated with the outside. The partition board 22 is disposed on the outer periphery of the silencing tube 21 to divide the receiving cavity into a plurality of mutually independent resonance cavities 11. The silencing tube 21 passes through the plurality of resonance cavities 11. A communication structure is disposed on the pipe section of the silencing tube 21 corresponding to each resonance cavity 11. The silencing tube 21 is respectively communicated with the plurality of resonance cavities 11 through the communication structure.

[0036] Applying the technical solution of the present utility model, the sound absorption structure 20 includes a sound absorption pipe 21 and a partition plate 22. The composition of the sound absorption structure is simple, occupies less space, and can save the manufacturing cost of the sound absorption device. And the sound absorption structure 20 is arranged inside the accommodation cavity, with a high degree of integration and will not affect the layout of the fuel cell system. The sound absorption pipe 21 and the partition plate 22 are of an integral structure, which is convenient for the installation and disassembly of the sound absorption pipe 21 and the partition plate 22 in the accommodation cavity, and improves the convenience of assembling the housing 10 and the sound absorption structure 20. The partition plate 22 is arranged on the outer periphery of the sound absorption pipe 21 to divide the accommodation cavity into a plurality of independent resonance cavities 11. A communication structure is arranged on the pipe section of the sound absorption pipe 21 corresponding to each resonance cavity 11. Compared with using sound absorption materials for noise reduction, the technical solution of the present application can adjust the central frequency of the resonance cavity 11 by adjusting the volume of the resonance cavity 11, the diameter of the sound absorption pipe 21, and the flow area of the communication structure for different noise frequencies, so that the central frequency of the resonance cavity 11 is close to or the same as the frequency of the noise, so as to cause the air in the resonance cavity 11 to resonate, and then consume the energy of the noise to reduce the noise. In this way, the noise reduction frequency range of the sound absorption device can be increased, and the flexibility and applicability of the noise reduction of the sound absorption device can be improved. And the sound absorption materials are prone to aging, and the subsequent maintenance cost is relatively high. The sound absorption device of the present application will not have the problem that the aging of the material affects the noise reduction effect, and at the same time saves the later maintenance cost.

[0037] Among them, the number of the resonance cavities 11 is not limited either, and can be set to 2, 3, 5 or more. In the embodiment, 3 resonance cavities 11 are arranged in the accommodation cavity, and the volumes of the 3 resonance cavities 11 decrease sequentially along the direction of noise propagation.

[0038] In this solution, the volume of the resonance cavity 11, the diameter of the sound absorption pipe 21, and the flow area of the communication structure are not limited, and can be selectively adjusted according to the actual application scenario and noise reduction requirements. Generally, the larger the volume of the resonance cavity 11, the lower the noise frequency eliminated. The 3 resonance cavities 11 can respectively eliminate noises with frequencies in the range of 1000 - 2000 Hz, 2000 - 3000 Hz, and 3000 - 4000 Hz.

[0039] Specifically, the sound absorption pipe 21 and the partition plate 22 are made of plastic material, and nylon material can be specifically selected. The nylon material can meet the required structural strength of the sound absorption structure 20 while having a low cost and being suitable for mass production. At the same time, the sound absorption pipe 21 and the partition plate 22 are integrally formed by an injection molding process. The injection molding process can meet the production requirements of various shapes and can save production costs.

[0040] Such as Figure 2As shown, the silencing pipe 21 includes a first section 211 and a second section 212 arranged in sequence. There is a gap 12 between the first section 211 and the second section 212, and the gap 12 forms a communication structure. Such a structure of the flow-through structure is convenient for processing and simplifies the production process of the silencing pipe 21. At the same time, dividing the silencing pipe 21 into two sections can avoid inconvenient installation when the length of the silencing pipe 21 is relatively long, and improves the convenience of disassembly and assembly of the silencing pipe 21.

[0041] In this embodiment, the gap 12 is arranged in the resonance cavity 11 with the smallest volume. The flow area of the flow-through structure is relatively large. Thus, the resonance cavity 11 formed at the communication structure can eliminate higher-frequency noise compared with the resonance cavity 11 with a smaller flow area of the flow-through structure. The noise frequency that the corresponding resonance cavity 11 can eliminate can be changed by changing the size of the gap between the first section 211 and the second section 212.

[0042] Among them, there is no limitation on the size of the gap between the first section 211 and the second section 212 and the lengths of the first section 211 and the second section 212, and they can be selected according to actual application requirements.

[0043] As Figure 2 shown, one end of the second section 212 away from the first section 211 has a tapered section 2121, and the diameter of the tapered section 2121 gradually increases in the direction away from the first section 211. In this way, the tapered section 2121 can guide the flow of the fluid. While facilitating the discharge of the fluid, it increases the flow area of the air outlet 214, and further improves the flow rate of the gas at the second opening of the cover body 13.

[0044] Specifically, as Figure 2 shown, the second section 212 and the housing 10 are of an integral structure. With such a setting, the disassembly and assembly steps between the second section 212 and the housing 10 are omitted, and thus the disassembly and assembly steps between the silencing pipe 21 and the housing 10 are simplified. Only the first section 211 needs to be installed, which is convenient for the assembly operation of the silencing pipe 21.

[0045] In other embodiments, the second section 212 can also be welded to the housing 10.

[0046] As Figure 2As shown in the figure, the housing 10 includes a cover body 13 and a sealing cover 14. The cover body 13 has a receiving cavity. The cover body 13 has a first opening and a second opening which are oppositely arranged. The sealing cover 14 seals the first opening. The silencing tube 21 has an air inlet 213 and an air outlet 214 which are oppositely arranged. The air inlet 213 is located on the sealing cover 14, and the air outlet 214 is communicated with the second opening. With the above arrangement, the installation position of the silencing tube 21 can be fixed by the sealing cover 14, which is convenient for the installation and disassembly of the silencing tube 21 with the housing 10, and improves the convenience of placing the silencing tube 21 into the receiving cavity. At the same time, the sealing cover 14 can cooperate with the housing 10 and the silencing tube 21 to form a resonance cavity 11 to eliminate noise. The fluid can only enter the resonance cavity 11 formed by the cooperation of the sealing cover 14, the housing 10 and the silencing tube 21 from the air inlet 213, avoiding air leakage in the resonance cavity 11 and ensuring the accuracy of noise reduction in the resonance cavity 11.

[0047] Among them, the sealing cover 14 is fixedly connected to the first opening of the housing 10. The connection form can be welding, bonding, fastener connection or non-connection, and the position of the sealing cover 14 is fixed by the fastening force when the housing 10 is assembled with other components.

[0048] Furthermore, as Figure 2 shown, a connection structure 131 is provided at the end of the cover body 13 where the first opening is located. The connection structure 131 is used to install a silencing device. With the above arrangement, the silencing device can be connected to the component that needs to reduce noise to reduce the noise of the component. The structure is simple and the operation is very convenient.

[0049] Among them, the connection structure 131 can be set as flange connection, interference fit or threaded connection. In this embodiment, flange connection is adopted, which is convenient for disassembly.

[0050] Specifically, there is an included angle between the extending direction of the air inlet 213 of the silencing tube 21 and the extending direction of the air outlet 214 of the silencing tube 21. With the above arrangement, the silencing tube 21 is a bent pipe section, which can effectively reduce the space volume of the silencing tube 21, miniaturize the silencing device, and avoid interference between the silencing device and other components.

[0051] As Figure 2 shown, the communication structure includes a silencing hole 15. The silencing holes 15 are annularly distributed on the silencing tube 21. In this way, the propagation speed of noise can be increased. At the same time, the silencing holes 15 cooperate with the silencing tube 21 and the cover body 13 to form a resonance cavity 11 to eliminate noise.

[0052] Among them, the specific shape of the silencing hole 15 is not limited, and it can be set as a circular hole, a square hole, a polygonal hole or other special-shaped holes.

[0053] As Figure 2As shown, the muffler structure 20 includes a plurality of partitions 22, which are arranged at intervals on the outer periphery of the muffler pipe 21 along the extension direction of the muffler pipe 21. Through the above arrangement, the accommodating cavity is divided into a plurality of independent resonance cavities 11 by the cooperation of the plurality of partitions 22, the muffler pipe 21 and the shell. The structure is simple, the complexity of the muffler structure 20 is reduced, and processing and molding are convenient.

[0054] The specific location of the partition 22 is not limited and can be adjusted according to the required volume of the resonance cavity 11. The partition 22 can be arranged on the first section 211 or on the second section 212. The partition 22 can be arranged on both the first section 211 and the second section 212.

[0055] In this embodiment, the partitions 22 are all arranged on the first section 211, the length of the first section 211 is greater than the length of the second section 212, and the interval 12 is arranged close to the air outlet 214. In this way, the partitions 22 are all arranged on the first section 211, which can reduce the length of the second section 212 and the components on the second section 212, thereby facilitating the connection between the second section 212 and the shell 10.

[0056] Preferably, the inner side of the partition 22 is arranged in contact with the outer wall of the muffler pipe 21, and the outer side of the partition 22 is arranged in contact with the inner wall of the shell 10. Through the above arrangement, it is possible to avoid the occurrence of cross-talk between adjacent resonance cavities 11 and the influence on the center frequency of the resonance cavity 11, so as to ensure the accuracy of the muffler pipe 21 in eliminating different noise frequencies, and improve the noise reduction effect of the muffler structure 20.

[0057] The technical solution provided by this application has the following advantages:

[0058] 1. Flexible frequency range of silencer: The silencer can be adjusted according to the frequency range of noise to be eliminated;

[0059] 2. Controllable cost: Using complex wrapping materials, such as sound-absorbing and sound-insulating combinations, will result in higher wrapping costs, causing the phenomenon of "the skin is more expensive than the filling", and it will be more difficult to recover the cost later;

[0060] 3. Compact structure: The muffler is integrated inside the shell, with a high degree of integration, and does not affect the layout of other systems;

[0061] 4. Good durability: The wrapping material will gradually age and lose its noise reduction ability as the usage time increases, but the muffler has no aging problem.

[0062] In another embodiment of the present invention, Figure 1 and Figure 2As shown, a humidifier is provided, which includes: a main body 300 and a noise elimination device. Among them, the main body 300 has a fluid inlet 301 and a fluid outlet 302, and the main body 300 is used for humidifying air. The noise elimination device is the noise elimination device mentioned in the above embodiment. The noise elimination device is detachably connected to the main body 300. The noise elimination device is arranged at the fluid inlet 301 or the fluid outlet 302, and the noise elimination device is communicated with the main body 300 through a silencing pipe 21. In this way, the noise elimination device can eliminate the noise generated by the humidifier. The above noise elimination device can effectively solve the problems of complex structure and single noise reduction effect of the noise elimination device in the prior art. The humidifier with the above noise elimination device also has the above advantages.

[0063] In some feasible embodiments, noise elimination devices can be arranged at both the fluid inlet 301 and the fluid outlet 302 to reduce the noise at the fluid inlet 301 and the fluid outlet 302 of the humidifier.

[0064] The noise elimination device provided in this application is not limited to being applied to the humidifier itself, and can also be applied to other components that require noise reduction.

[0065] It should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0066] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps described in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that for the convenience of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0067] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present utility model; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0068] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above-mentioned", etc. can be used here to describe the spatial positional relationship between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation other than the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding explanations should be made for the spatial relative descriptions used here.

[0069] In addition, it should be noted that using words such as "first", "second", etc. to limit components is only for the convenience of differentiating the corresponding components. Without additional statement, the above-mentioned words have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present utility model.

[0070] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A noise elimination device, characterized in that, The noise elimination device includes: A housing (10) having a receiving cavity; A noise elimination structure (20) disposed in the receiving cavity. The noise elimination structure (20) includes a silencing tube (21) and a partition (22). The silencing tube (21) and the partition (22) are of an integral structure. Both ends of the silencing tube (21) are respectively communicated with the outside. The partition (22) is disposed on the outer periphery of the silencing tube (21) to divide the receiving cavity into a plurality of mutually independent resonance cavities (11). The silencing tube (21) passes through a plurality of the resonance cavities (11). A communication structure is provided on the pipe segment of the silencing tube (21) corresponding to each of the resonance cavities (11). The silencing tube (21) is communicated with a plurality of the resonance cavities (11) respectively through the communication structure.

2. The noise elimination device according to claim 1, characterized in that, The silencing tube (21) includes a first section (211) and a second section (212) arranged in sequence. There is a gap (12) between the first section (211) and the second section (212), and the gap (12) forms the communication structure.

3. The sound-absorbing device according to claim 2, characterized in that, One end of the second section (212) away from the first section (211) has a tapered section (2121), and the diameter of the tapered section (2121) gradually increases in the direction away from the first section (211).

4. The soundproofing device according to claim 2, characterized in that, The second section (212) and the housing (10) are of an integral structure.

5. The noise elimination device according to claim 4, characterized in that, The housing (10) includes a cover body (13) and a sealing cover (14). The cover body (13) has the receiving cavity. The cover body (13) has a first opening and a second opening arranged oppositely. The sealing cover (14) seals the first opening. The silencing tube (21) has an air inlet (213) and an air outlet (214) arranged oppositely. The air inlet (213) is located on the sealing cover (14), and the air outlet (214) is communicated with the second opening.

6. The noise elimination device according to claim 5, characterized in that, A connection structure (131) is provided at the end of the cover body (13) where the first opening is located, and the connection structure (131) is used for installing the noise elimination device.

7. The sound insulation device according to claim 5, characterized in that, The extending direction of the air inlet (213) of the silencing tube (21) and the extending direction of the air outlet (214) of the silencing tube (21) form an included angle.

8. The noise elimination device according to claim 1, characterized in that, The communication structure includes a silencing hole (15), and the silencing holes (15) are annularly distributed on the silencing tube (21).

9. The noise elimination device according to claim 1, characterized in that, The noise elimination structure (20) includes a plurality of the partitions (22), and the plurality of the partitions (22) are spaced along the extending direction of the silencing tube (21) on the outer periphery of the silencing tube (21).

10. A humidifier, characterized in that, The humidifier includes: A body (300) having a fluid inlet (301) and a fluid outlet (302), and the body (300) is used for humidifying air; A noise elimination device, which is the noise elimination device according to any one of claims 1 to 9. The noise elimination device is detachably connected to the body (300). The noise elimination device is disposed at the fluid inlet (301) and / or the fluid outlet (302), and the noise elimination device is communicated with the body (300) through the silencing tube (21).

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