Silencing device and drying cabinet

Abstract

The embodiment of the utility model provides a silencing device and a drying cabinet. The silencing device comprises a gas leading-in device and a silencing device, wherein the gas leading-in device is suitable for leading in gas; the silencing structure is made of a porous material and communicated with external gas, and the silencing structure is suitable for wrapping the gas outlet end of the gas leading-in device so that the gas can flow out through the silencing structure. By arranging the silencing device, the silencing structure wrapping the air outlet end absorbs sound waves, and therefore silencing of the air outlet end is achieved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of silencing, and in particular to a silencing device and a drying cabinet. Background Art

[0002] Gases at the outlet of a pipe tend to generate noise due to turbulence and friction. For gases with high flow rates or pressures, the noise is more noticeable, so noise reduction is necessary. Generally, this can be achieved by using a pipe silencer.

[0003] Chinese patent document CN116181610A provides a pipeline silencer, including an air inlet end, a cavity, a silencer pipe, a silencer filter, and an air outlet end. Based on the combined silencer of the silencer pipe and the silencer filter, the buffer volume in the cavity is increased, so that part of the sound energy of the gas is converted into internal energy consumption by friction with the inner surface of the cavity, and part of the sound energy of the gas is converted into kinetic energy consumption through the silencer filter, thereby achieving silence and noise reduction; however, the silencer requires a larger cavity volume as a buffer, which takes up more space and has a more complex structure.

[0004] Chinese patent document CN207438769U provides a pipeline silencer, wherein the noise reduction component is arranged in the inner cavity of the shell, and the replacement and removal of the noise reduction component is relatively inconvenient.

[0005] Therefore, it is necessary to develop a new silencer. Utility Model Content

[0006] An embodiment of the present disclosure provides a silencer device, which includes: a gas introduction device, suitable for introducing gas; a silencer structure, made of a porous material, connected to the external gas, and suitable for wrapping the gas outlet end of the gas introduction device so that the gas can flow out through the silencer structure.

[0007] In some embodiments, the muffler structure includes at least two inner surfaces, the gas outlet end of the gas introduction device is suitable for being placed between the at least two inner surfaces, and at least one of the inner surfaces is concave-convex.

[0008] In some embodiments, the sound-absorbing structure includes a first sound-absorbing portion and a second sound-absorbing portion that are stacked together, the first sound-absorbing portion includes a first surface with a concave-convex shape, the second sound-absorbing portion includes a second surface with a concave-convex shape, the first surface and the second surface are arranged opposite to each other and have a gas channel between them, and the gas is suitable for flowing out of the sound-absorbing structure through the gas channel.

[0009] In some embodiments, the sound-absorbing structure further includes: at least one connecting portion, wherein the connecting portion is used to connect one end of the first sound-absorbing portion with one end of the second sound-absorbing portion.

[0010] In some embodiments, at least one through hole is provided on one of the connecting parts, so that a gas pipeline passes through the through hole and enters between the first muffler part and the second muffler part.

[0011] In some embodiments, the connecting portion, the first muffler portion, and the second muffler portion are an integral structure.

[0012] In some embodiments, the gas introduction device includes: an air duct, the air outlet end of the air duct is arranged between the first silencer part and the second silencer part; and a gas regulating valve connected to the air duct, for regulating the gas flow passing through the air duct.

[0013] In some embodiments, the silencing device further includes: a box body, adapted to accommodate the silencing structure, the box body having an opening to allow the gas passing through the silencing structure to communicate with the outside.

[0014] In some embodiments, the sound-absorbing structure is made of a flexible material.

[0015] In some embodiments, the material of the sound-absorbing structure is sound-insulating cotton.

[0016] An embodiment of the present disclosure also provides a drying cabinet for drying samples by introducing gas, the drying cabinet comprising: a cabinet body suitable for accommodating samples; at least one air inlet provided in the cabinet body so that gas can be introduced into the cabinet body through the air inlet; any of the above silencers is provided in the cabinet body, and the gas introduction device is connected to the at least one air inlet.

[0017] In some embodiments, the cabinet includes a multi-layer rack suitable for placing the samples; and the silencer is detachably connected to the multi-layer rack.

[0018] Compared with the prior art, the technical solution of the embodiment of the present disclosure has the following beneficial effects:

[0019] The silencer structure of the embodiment of the present disclosure is made of a porous material, which wraps the gas outlet end of the gas introduction device. The silencer structure absorbs sound waves to achieve silence at the gas outlet end.

[0020] Furthermore, the sound-absorbing structure of the embodiment of the present disclosure includes at least two inner surfaces, at least one of which is concave-convex. The outlet end of the gas introduction device is suitable for being placed between the at least two inner surfaces. The concave-convex inner surface has a larger specific surface area, which further enhances the absorption efficiency of sound waves and improves the sound-absorbing effect.

[0021] Furthermore, the material of the sound-absorbing structure of the embodiment of the present disclosure is a porous flexible material. The porous flexible material has strong adaptability and can be used for sound absorption under various air pressure conditions. The pore structure of the porous flexible material changes under environmental changes such as force or temperature and humidity. When the pressure is high, the pores expand, thereby increasing the adsorption amount of gas. The expanded pores increase the specific surface area within the pores, which is more conducive to the absorption of sound waves, thereby having a good sound-absorbing effect when the air pressure is high.

[0022] Furthermore, there is a gas channel between the first silencer part and the second silencer part of the embodiment of the present disclosure, and the gas can flow out of the silencer structure from the gas channel, thereby improving the gas exhaust efficiency while reducing noise, avoiding the pressure increase caused by untimely gas discharge and affecting the silencer effect, and the exhausted gas has a certain flow rate and can be used for drying samples, etc.

[0023] In the drying cabinet of the disclosed embodiment, a silencer is arranged inside the cabinet, a gas introduction device is connected to the air inlet of the drying cabinet, and a silencer structure is connected to the external gas, so that the gas used to dry the sample flows out through the air inlet and the gas introduction device and through the silencer structure. The silencer structure achieves silence and noise reduction at the air inlet, and the gas flowing out through the silencer structure flows inside the cabinet of the drying cabinet to dry the sample.

[0024] Furthermore, the box body of the silencer device inside the drying cabinet has two openings, and the silencer device is connected to the air inlet of the drying cabinet one by one, so that the gas is divided into two paths through the silencer device and discharged from the two openings, thereby increasing the uniformity of the gas in the cabinet, and improving the drying efficiency of the sample while achieving silence and noise reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features and advantages of the present disclosure will be better understood through the following detailed description of the optional embodiments in conjunction with the accompanying drawings, in which the same reference numerals represent the same or similar components, wherein:

[0026] Figure 1 A schematic diagram of the three-dimensional structure of a silencer according to an embodiment of the present disclosure is shown.

[0027] Figure 2-Figure 4 A schematic diagram of the explosion structure of a silencer according to an embodiment of the present disclosure is shown.

[0028] Figure 5 A structural schematic diagram of a drying cabinet according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0029] Embodiments of the present disclosure are described in detail below, with examples of the embodiments illustrated in the accompanying drawings. In the accompanying drawings, the same or similar reference numerals 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 illustrative and are intended only to explain the present disclosure and are not to be construed as limiting the present disclosure.

[0030] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meanings understood by persons having ordinary skills in the field to which the present disclosure belongs. In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present disclosure.

[0031] Gas noise is a problem when flowing through a pipeline and at the pipeline outlet. This is especially noticeable for gases with high flow rates or pressures, necessitating noise reduction. To address the noise problem generated by gas flow, the present disclosure provides a silencer device comprising: a gas introduction device adapted to introduce gas; and a silencer structure, made of a porous material and connected to the external gas, adapted to wrap around the outlet end of the gas introduction device to facilitate gas outflow through the silencer structure.

[0032] The following is a detailed description of the silencer device according to the embodiment of the present disclosure with reference to the accompanying drawings.

[0033] Figure 1 FIG. 1 shows a schematic diagram of the three-dimensional structure of a muffler device according to an embodiment of the present disclosure. Figure 2 FIG2 shows a schematic diagram of the explosion structure of the silencer according to an embodiment of the present disclosure. Figure 1 and Figure 2 The embodiment of the present disclosure provides a silencer 1, which includes a gas introduction device 11 and a silencer structure 12. The gas introduction device 11 is suitable for introducing gas into the silencer structure 12, and the silencer structure 12 is suitable for wrapping the gas outlet end of the gas introduction device 11. The silencer structure 12 is made of a porous material and is connected to the external gas. The gas introduction device 11 is suitable for introducing gas into the silencer structure 12 and flowing out through the silencer structure 12, thereby achieving silence and exhaust.

[0034] To better absorb sound waves and enhance the sound-absorbing effect, in some embodiments, the sound-absorbing structure 12 is made of a porous flexible material. The pore structure of a porous flexible material changes under stress or environmental changes such as temperature and humidity. At high pressures, the pores expand, increasing the amount of gas adsorbed. The expanded pores increase the specific surface area within the pores, further facilitating the absorption of sound waves, thereby achieving a good sound-absorbing effect at high air pressures. Porous flexible materials are highly adaptable and can be used for sound absorption under various air pressure conditions.

[0035] In some embodiments, the sound-absorbing structure 12 is made of sound-insulating cotton, such as rock wool, glass wool, rubber plastic, aluminum silicate, sponge, etc.

[0036] In some embodiments, the sound-absorbing structure 12 is made of a porous rigid material. The porous rigid material has good mechanical strength. The porous rigid material may be a composite material containing graphene.

[0037] In some embodiments, the muffler structure 12 includes at least two inner surfaces, and the gas outlet end of the gas introduction device 11 is disposed between the at least two inner surfaces.

[0038] In some embodiments, at least one inner surface is concave-convex. Compared with a flat surface, the concave-convex surface has a larger specific surface area, thereby having a larger contact area with sound waves, thereby improving the absorption efficiency of sound waves.

[0039] In some embodiments, the silencer structure 12 includes a first silencer portion 121 and a second silencer portion 122 arranged in a stacked manner, the first silencer portion 121 includes a concave-convex first surface, the second silencer portion 122 includes a concave-convex second surface, the first surface of the first silencer portion 121 and the second surface of the second silencer portion 122 are arranged opposite to each other and have a gas channel between them; the gas outlet end of the gas introduction device 11 is suitable for being placed between the first surface and the second surface, and the gas is discharged through the gas channel between the first surface and the second surface after passing through the silencer structure 12, thereby improving the gas discharge efficiency and avoiding the pressure increase caused by untimely gas discharge and affecting the silencer effect, and the discharged gas has a certain flow rate and can be used in a variety of gas application scenarios, such as drying samples.

[0040] In some embodiments, the sound-absorbing structure 12 further includes at least one connecting portion 123, which is used to connect one end of the first sound-absorbing portion 121 to one end of the second sound-absorbing portion 122. In some embodiments, the connecting portion 123 is provided at an end of the first sound-absorbing portion 121 corresponding to one end of the second sound-absorbing portion 122, and is connected to the first sound-absorbing portion 121 and the second sound-absorbing portion 122, respectively.

[0041] In some embodiments, the connecting portion 123 includes a third surface that is adjacent to the first surface of the first muffler 121 and the second surface of the second muffler 122. In some embodiments, the third surface of the connecting portion 123 is concave-convex, providing a larger contact area for sound waves than a planar surface. In some embodiments, the first surface of the first muffler 121, the second surface of the second muffler 122, and the third surface of the connecting portion 123 are all concave-convex, so that the outlet end of the gas introduction device 11 is surrounded by multiple concave-convex surfaces, thereby improving the efficiency of sound wave absorption.

[0042] In some embodiments, the silencer structure 12 includes two or more connecting parts 123, and the third surface of the two or more connecting parts 123 together with the first surface and the second surface constitute the inner surface of the air outlet end of the gas introduction device 11. The larger inner surface area increases the absorption efficiency of sound waves and improves the silencer effect.

[0043] In some embodiments, at least one through hole is provided on one of the connecting portions 123 , so that the gas pipeline passes through the through hole and enters between the first muffler portion 121 and the second muffler portion 122 .

[0044] In some embodiments, the connecting portion 123 is an integral structure with the first muffler portion 121 and the second muffler portion 122 .

[0045] In some embodiments, the connection portion 123, the first muffler portion 121, and the second muffler portion 122 may be made of the same or different porous flexible materials. In some embodiments, the connection portion 123, the first muffler portion 121, and the second muffler portion 122 may be made of sound insulation cotton.

[0046] In some embodiments, the silencer device 1 of the disclosed embodiment further includes a box body 13, which is suitable for accommodating the silencer structure 12. The box body 13 has an opening to allow the gas passing through the silencer structure 12 to communicate with the outside, thereby avoiding problems such as excessive pressure or affecting the silencer effect due to untimely discharge of gas.

[0047] For scenarios where gas is used, such as using gas to dry a sample, the structure of the box body 13 and the size, number, and position of the openings can be set according to the requirements for the direction and position of the gas outlet, so that the gas can be discharged from the silencer 1 in a specific direction. In some embodiments, the openings of the box body 13 are provided on one or more walls of the box body 13; in some embodiments, such as Figure 1 As shown, the box body 13 includes four walls, and the opening 135 of the box body 13 is defined by the edges of the four walls.

[0048] In some embodiments, the size of the opening of the box body 13 is larger than the size of the gas channel between the first surface of the first muffler part 121 and the second surface of the second muffler part 122 so that the gas can be discharged quickly; in some embodiments, the size of the opening of the box body 13 is consistent with the size of the gas channel between the first surface of the first muffler part 121 and the second surface of the second muffler part 122 to accurately control the discharge rate of the gas of the muffler device 1.

[0049] In some embodiments, the silencer structure 12 is snugly arranged in the box body 13, that is, there is no gap between the two. On the one hand, the fixing effect of the box body 13 on the silencer structure 12 is increased, and on the other hand, the gas is prevented from flowing between the box body 13 and the silencer structure 12 to reduce the gas exhaust speed. In addition, the overall volume of the silencer device 1 is reduced, so that more silencer devices 1 can be arranged in a certain space.

[0050] In some embodiments, the box body 13 includes: a first wall 131, which is arranged on the same side of the first silencer 121 and the second silencer 122, and a first through hole 1311 is provided on the first wall 131 so that the gas pipeline passes through the first through hole 1311 and enters between the first surface of the first silencer 121 and the second surface of the second silencer 122.

[0051] In some embodiments, the box body 13 also includes a second wall 132, which is arranged on one side of the outer surface of the first silencer 121, the outer surface of the first silencer 121 is arranged opposite to the first surface, and the second wall 132 is interconnected with the first wall 131; in some embodiments, the box body 13 also includes a third wall 133, the third wall 133 and the second wall 132 are arranged on opposite sides of the silencer structure 12, and the third wall 133 is interconnected with the first wall 131.

[0052] In some embodiments, the box body 13 further includes a fourth wall 134 , which is disposed opposite to the first wall 131 and connected to the second wall 132 and the third wall 133 , respectively.

[0053] In some embodiments, corresponding edges of the connected first wall 131 , second wall 132 , third wall 133 , and fourth wall 134 form two openings on both sides of the box body 13 without cavity walls, and the two openings are arranged on opposite sides of the sound-absorbing structure 12 .

[0054] In some embodiments, the material of the box body 13 is a sound-absorbing material, thereby further improving the sound-absorbing effect. In some embodiments, the material of the box body 13 is acrylic, iron, aluminum alloy, etc.

[0055] The gas introduction device 11 of the embodiment of the present disclosure can be directly a gas pipeline, or can be connected to the outlet of the gas pipeline, and the gas is introduced into the silencer structure 12 through the gas introduction device 11.

[0056] Continue to refer Figure 2 In some embodiments, the gas introduction device 11 of the embodiment of the present disclosure includes an air duct 111, and the outlet end of the air duct 111 serves as the air outlet end of the gas introduction device 11, and is arranged between the first silencer 121 and the second silencer 122, specifically between the first surface of the first silencer 121 and the second surface of the second silencer 122; the gas introduction device 11 also includes a gas regulating valve 112, which is connected to the air duct 111 and is used to adjust the gas flow passing through the air duct 111, so as to control the gas flow entering the silencer structure 12 as needed, to avoid excessive flow affecting the silencer effect or too small flow resulting in low silencer efficiency.

[0057] In some embodiments, the gas introduction device 11 also includes a threaded joint 113, which is respectively connected to the gas guide tube 111 and the gas regulating valve 112; in some embodiments, the threaded joint 113 includes a sealing structure provided therein, and the sealing structure is suitable for connecting with the gas guide tube 111 to ensure airtightness during gas transportation, avoiding gas leakage problems and noise problems caused by gas leakage.

[0058] In some embodiments, the internal sealing structure of threaded connector 113 is a sealing ring that matches the diameter of air tube 111. Air tube 111 is adapted to be inserted into and secured to threaded connector 113. The sealing ring ensures the airtightness of the connection between air tube 111 and threaded connector 113. In some embodiments, threaded connector 113 is threadedly connected to gas regulating valve 112.

[0059] In some embodiments, the silencer 1 can be fixedly connected to the outside world through a fixing member, and the fixed connection can be a detachable connection. Figure 2 Taking the silencer device shown as an example, the fixing member is a magnet assembly 14, which is composed of a plurality of magnets and is provided on the surface of the third wall 133 of the box body 13 close to the silencer structure 12 or embedded in the third wall 133, and is used to fix the silencer 1 to a magnetic plane; in some embodiments, the fixing member is an adhesive, and the silencer 1 is bonded to a desired position by applying the adhesive to an outer surface of the box body 13, such as the outer surface of the third wall 133. In some embodiments, the fixing member is a screw, and the box body is provided with a threaded hole suitable for cooperating with the screw, so that the silencer can be fixed to a flat or non-flat object by threaded cooperation. The fixed connection method of the silencer 1 to the outside world is only for illustration here and does not constitute a limitation to the technical solution of the embodiments of the present disclosure.

[0060] Figure 3 and Figure 4 The exploded structure diagram of the silencer according to the embodiment of the present disclosure is shown. Figure 2 The difference is, Figure 2In the embodiment of the silencer device 1, the gas is introduced into the interior of the silencer structure 12 from the through hole of the connecting portion 123; and Figure 3 In the muffler device 1 of the embodiment, the gas is introduced from the gas channel between the first surface of the first muffler portion 121 and the second surface of the second muffler portion 122, and no through hole is provided on the connecting portion 123; Figure 4 In the silencer device 1 of the embodiment, gas is introduced from the gas channel between the first surface of the first silencer portion 121 and the second surface of the second silencer portion 122, and the silencer structure 12 does not include a connecting portion. Figure 2 and Figure 3 In the embodiment of the sound-absorbing structure 12, the first sound-absorbing part 121, the second sound-absorbing part 122 and the connecting part 123 can be an integrally formed sound-absorbing cotton. Figure 4 The first muffler 121 and the second muffler 122 of the embodiment are two independent parts. Figure 2 and Figure 3 The sound-absorbing structure 12 has a larger inner surface area due to the connection portion 123, and has a higher efficiency in absorbing sound waves, which is beneficial to further improve the sound-absorbing effect.

[0061] The silencer of the disclosed embodiment can be used for silencing and reducing noise in various gas pipelines and pipeline outlets. For example, for air compressors widely used in industrial production, due to the high gas pressure, the air compressor will generate a large noise during operation. The silencer of the disclosed embodiment can be set at the gas pipeline outlet of the air compressor, directly wrapping the gas pipeline outlet in the silencer structure, or connecting the gas pipeline outlet of the air compressor through a gas introduction device, so that the gas outlet end of the gas introduction device is wrapped in the silencer structure, thereby achieving silencing and reducing noise for the gas pipeline outlet of the air compressor. In some embodiments, the noise at the gas pipeline outlet of the air compressor is reduced to below 65 decibels by setting the silencer.

[0062] Furthermore, a gas channel is provided between the first silencer portion and the second silencer portion of the embodiment of the present disclosure, and the gas is discharged from the silencer device through the gas channel. On the premise of achieving silence and noise reduction at the gas outlet of the air compressor, the normal use of the compressed air discharged by the air compressor is not affected, and the original exhaust direction of the gas can be changed according to the structural design of the silencer structure and the box body. For example, the gas outlet of the air compressor has one exhaust direction, but after passing through the silencer structure, it can be discharged in two directions. The silencer device can be applied to a variety of scenarios where air compressors are used.

[0063] The embodiment of the present disclosure also provides a drying cabinet for passing gas to dry samples. Figure 5 FIG2 shows a schematic structural diagram of a drying cabinet according to an embodiment of the present disclosure. Figure 5The drying cabinet includes: a cabinet 2 suitable for accommodating samples; at least one air inlet 3 provided in the cabinet 2 so that gas can be passed into the cabinet 2 through the air inlet 3; any of the above silencer devices 1 is provided in the cabinet 2, and the gas introduction device of the silencer device 1 is connected to the at least one air inlet 3, so that the gas outlet end is wrapped in the silencer structure, so that the gas flows out into the cabinet 2 through the silencer structure.

[0064] In some embodiments, the cabinet 2 includes a multi-layer rack 21 suitable for placing samples to be dried; the muffler 1 is detachably connected to the multi-layer rack 21. In some embodiments, the muffler 1 can be connected to the multi-layer rack 21 via fasteners, such as magnets to connect the housing 13 of the muffler 1 to the multi-layer rack 21, adhesives to secure the housing 13 to the multi-layer rack 21, or screws to secure the housing 13, which has screw holes, to the multi-layer rack 21. Because the muffler 1 is detachably connected to the multi-layer rack 21, the muffler can be positioned at specific locations based on the shape, quantity, and distribution of the samples to be dried. This allows the drying cabinet to be used for drying a variety of sample types while ensuring the muffler effect of the air inlet 3.

[0065] In some embodiments, the sound-absorbing structure has a gas channel, such as a gas channel between the first sound-absorbing portion and the second sound-absorbing portion. The gas channel is connected to the external gas, so that the gas flows out of the cabinet through the sound-absorbing structure.

[0066] In some embodiments, the silencer structure is housed in a box body, which has an opening. By setting the direction and size of the opening, the gas is discharged from the silencer 1 from one or more specific directions; in some embodiments, the sample is located at a position corresponding to the opening of the box body of the silencer 1, thereby improving the drying efficiency.

[0067] In some embodiments, the silencer 1 is connected to multiple air inlets 3, so that one silencer silences the air outlet ends of multiple air inlets, thereby improving the efficiency of silencing and noise reduction.

[0068] In some embodiments, the silencer 1 corresponds to the air inlet 3 on a one-to-one basis, so as to ensure both the silencer effect and the drying efficiency of the gas discharged through the silencer 1 on the sample.

[0069] In some embodiments, the box body of the silencer 1 is provided with two openings, and the silencer 1 is connected to the air inlet one by one, so that the gas is discharged in two ways through the silencer 1, which increases the uniformity of the gas in the drying cabinet and is conducive to improving the drying efficiency.

[0070] In some embodiments, the drying cabinet is adapted to allow compressed air to dry the sample, and the noise level at the drying cabinet's air inlet 3 is reduced to below 65 decibels by the muffler 1. In some embodiments, the muffler structure is made of sound-insulating cotton. Under the pressure of compressed air, the pores of the cotton expand, increasing the specific surface area within the pores, thereby increasing the contact area with the gas and improving the efficiency of sound wave absorption.

[0071] The above description is merely an exemplary embodiment for illustrating the principles of the present disclosure and is not intended to limit the scope of protection of the present disclosure. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present disclosure, and such modifications and improvements are also within the scope of protection of the present disclosure.

Claims

1. A silencer, characterized in that: include: A gas introduction device, suitable for introducing gas; The silencer structure is made of a porous material and is connected to the external gas. The silencer structure is suitable for wrapping the gas outlet end of the gas introduction device so that the gas flows out through the silencer structure.

2. The silencing device according to claim 1, characterized in that: The muffler structure includes at least two inner surfaces, the gas outlet end of the gas introduction device is suitable for being placed between the at least two inner surfaces, and at least one of the inner surfaces is concave-convex.

3. The silencing device according to claim 1, wherein: The silencer structure includes a first silencer portion and a second silencer portion which are stacked together. The first silencer portion includes a first surface with a concave-convex shape, and the second silencer portion includes a second surface with a concave-convex shape. The first surface and the second surface are arranged opposite to each other and have a gas channel between them. The gas is suitable for flowing out of the silencer structure through the gas channel.

4. The silencing device according to claim 3, characterized in that: The noise reduction structure further includes: at least one connecting portion, wherein the connecting portion is used to connect one end of the first noise reduction portion with one end of the second noise reduction portion.

5. The silencing device according to claim 4, characterized in that: One of the connecting parts is provided with at least one through hole, so that the gas pipeline passes through the through hole and enters between the first muffler part and the second muffler part.

6. The silencing device according to claim 4, characterized in that: The connecting portion, the first muffler portion, and the second muffler portion are integrated into one structure.

7. The silencing device according to claim 3, characterized in that: The gas introduction device comprises: an air duct, wherein an air outlet end of the air duct is arranged between the first muffler portion and the second muffler portion; A gas regulating valve is connected to the air duct and is used to regulate the gas flow passing through the air duct.

8. The silencing device according to claim 1, wherein: Also includes: The box body is adapted to accommodate the sound-absorbing structure, and the box body has an opening for allowing the gas passing through the sound-absorbing structure to communicate with the outside.

9. The silencing device according to any one of claims 1 to 8, characterized in that: The sound-absorbing structure is made of flexible material.

10. The silencing device according to any one of claims 1 to 8, characterized in that: The material of the sound-absorbing structure is sound-insulating cotton.

11. A drying cabinet for drying samples by passing gas, characterized in that: include: a cabinet suitable for accommodating samples; at least one air inlet provided in the cabinet so as to allow gas to enter the cabinet through the air inlet; At least one silencer according to any one of claims 1 to 10 is disposed in the cabinet, and the gas introduction device is connected to the at least one air inlet.

12. The drying cabinet according to claim 11, characterized in that: The cabinet includes a multi-layer shelf suitable for placing the samples; The silencer is detachably connected to the multi-layer storage rack.

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