Silencing structure, air suction and exhaust device and integrated cooker

Abstract

The utility model discloses a silencing structure, an air suction and exhaust device and an integrated cooker. The silencing structure comprises an inner pipe and a housing, the inner pipe is suitable for air flow to penetrate through, a through hole is formed in the pipe wall of the inner pipe, the housing surrounds the inner pipe to form a cavity with the inner pipe, and the cavity is communicated with the through hole. According to the technical scheme, the inner pipe is used for transmitting the air flow, in the flowing process of the air flow, noise enters the cavity through the through holes and acts with the cavity to generate resonance, sound energy of the noise is consumed, and through the arrangement, the noise can also be reduced on the premise that the flow speed of the air flow does not need to be reduced. Particularly, noise in a specific frequency band can be eliminated by adjusting the aperture of the through hole, the thickness of the inner pipe and the thickness of the cavity. In addition, the noise elimination structure is designed to be detachably arranged and can be regularly detached for cleaning, and the noise elimination effect of the noise elimination structure is prevented from losing efficacy.

Description

Technical Field

[0001] The present application relates to the technical field of range hoods, and in particular to a sound-absorbing structure, an exhaust device and an integrated stove. Background Art

[0002] Exhaust devices such as range hoods use the operation of the internal fan to extract oil fumes. The extraction effect and noise performance are two main performance indicators. Generally speaking, the noise can be reduced by reducing the fan speed and increasing the air duct resistance to reduce the air volume. However, the extraction effect deteriorates when the air volume becomes smaller, and the deterioration of the extraction effect will affect the user experience. Utility Model Content

[0003] The present application aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the present application proposes a sound-absorbing structure.

[0004] To achieve the above object, the present application discloses a sound-absorbing structure, which comprises:

[0005] an inner tube, adapted for airflow to pass through, wherein a through hole is provided on a tube wall of the inner tube; and

[0006] The cover shell surrounds the inner tube to form a cavity between the cover shell and the inner tube, and the cavity is communicated with the through hole.

[0007] In some embodiments of the present application, a through-hole row is provided on the tube wall of the inner tube, and the through-hole row includes a plurality of through-holes arranged alternately along the axial direction of the inner tube.

[0008] In some embodiments of the present application, a plurality of the through hole rows are alternately arranged along the circumference of the inner tube.

[0009] In some embodiments of the present application, when observed along the axial direction of the inner tube, the tube wall of the inner tube includes a top, a bottom, a left side and a right side, and the through hole is provided at the top, the left side and / or the right side.

[0010] In some embodiments of the present application, the bottom faces the air inlet end or the air outlet end of the inner tube and is inclined relative to a horizontal plane.

[0011] In some embodiments of the present application, the cover shell includes a first ring portion, a second ring portion, and a surrounding plate portion surrounding the inner tube, and the surrounding plate portion is disposed between the first ring portion and the second ring portion.

[0012] In some embodiments of the present application, the enclosure portion, the first ring portion, and the second ring portion constitute a closed wall of the cavity.

[0013] In some embodiments of the present application, the first ring portion, the second ring portion and the inner tube are integrally formed, and the enclosure portion includes a first half shell and a second half shell connected to each other, the first half shell is respectively connected to the first ring portion and the second ring portion, and the second half shell is respectively connected to the first ring portion and the second ring portion.

[0014] In some embodiments of the present application, the aperture of the through hole is 1.8 mm to 2.4 mm; and / or the thickness of the tube wall of the inner tube is 0.8 mm to 1.2 mm; and / or the thickness of the cavity along the radial direction of the inner tube is 10 mm to 70 mm.

[0015] The second aspect of the present application discloses an exhaust device, which includes a fan and the above-mentioned silencer structure, and the inner tube is connected to the outlet of the fan.

[0016] In some embodiments of the present application, the sound-absorbing structure is configured to be detachable.

[0017] In some embodiments of the present application, the exhaust device also includes an exhaust duct, the inner tube connects the outlet of the fan and the exhaust duct; the first ring portion of the silencer structure is suitable for connecting to the fan, one end of the inner tube is exposed from the cover shell to be suitable for the exhaust duct to be installed, and the second ring portion of the silencer structure is suitable for abutting against the exhaust duct when the exhaust duct is installed on the inner tube.

[0018] The third aspect of the present application discloses an integrated stove, which includes a stove and the above-mentioned exhaust device, wherein the outlet of the fan of the exhaust device is open in the transverse direction.

[0019] The inner tube of the technical solution of the present application is used to transmit airflow. During the flow of airflow, noise enters the cavity through the through hole, resonates with the cavity, and consumes the acoustic energy of the noise. By setting it in this way, the noise can be reduced without reducing the airflow velocity. In particular, by adjusting the aperture of the through hole, the thickness of the inner tube, and the thickness of the cavity, the noise in a specific frequency band can be eliminated. In addition, the noise-reducing structure is designed to be detachable, and can be regularly disassembled for cleaning to prevent the noise-reducing effect of the noise-reducing structure from failing.

[0020] Other advantages of the present application will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other designs can be obtained based on the structures shown in these drawings without paying any creative work.

[0022] Figure 1 Schematic diagram of an integrated stove in some embodiments;

[0023] Figure 2 Schematic diagram of an exhaust device in some embodiments;

[0024] Figure 3 Schematic diagram of the exhaust device in some embodiments (viewing angle and Figure 2 different);

[0025] Figure 4 Schematic diagram of the sound-absorbing structure in some embodiments;

[0026] Figure 5 Schematic diagram of the sound-absorbing structure in some embodiments (viewing angle and Figure 4 different);

[0027] Figure 6 for Figure 5 The enlarged view marked as A in FIG.

[0028] Figure 7 An exploded view of the sound-absorbing structure in some embodiments;

[0029] Figure 8 sectional views of the muffler structures in some embodiments (observed along the axial direction of the inner tube);

[0030] Fig. 9 for Figure 8 The enlarged image marked with B.

[0031] Description of Figure Numbers:

[0032] A sound-absorbing structure 1000, an inner tube 1100, a through hole 1110, a through hole row 1120, a tube wall 1130, a top 1131, a bottom 1132, a left side 1133, a right side 1134, a cover shell 1200, a first ring portion 1210, a second ring portion 1220, a surrounding plate portion 1230, a first half shell 1231, a second half shell 1232, a cavity 1300, an exhaust device 2000, a fan 2100, an exhaust duct 2200, a stove 3000, and an integrated stove 4000.

[0033] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0038] The first aspect of the present application discloses a sound-absorbing structure 1000, Figure 4 , Figure 5 , Figure 6 and Figure 8 As shown, in some embodiments, the sound-absorbing structure 1000 includes an inner tube 1100 and a cover shell 1200. The inner tube 1100 is used for airflow to pass through, and the tube wall 1130 of the inner tube 1100 is provided with a through hole 1110. The cover shell 1200 is designed to surround the inner tube 1100, so that a cavity 1300 is formed between the cover shell 1200 and the inner tube 1100, and the through hole 1110 needs to be connected to the cavity 1300.

[0039] In this embodiment, the inner tube 1100 is used to transmit airflow. During the flow of airflow, noise enters the cavity 1300 through the through hole 1110, resonates with the cavity 1300, and consumes the sound energy of the noise. Through such a setting, the noise can be reduced without reducing the airflow velocity.

[0040] The following description will be made in conjunction with the exhaust device 2000. For example, the exhaust device 2000 is a range hood. The exhaust device 2000 includes a fan 2100. When the fan 2100 is running, it can inhale gas and discharge the gas. The main noise of the exhaust device 2000 comes from the operation of the fan 2100. The airflow at the outlet of the fan 2100 is turbulent, the flow area is reduced, and the airflow speed is relatively large. The outlet of the fan 2100 is the main noise source. The sound-absorbing structure 1000 can be set at the outlet of the fan 2100 and connected to the outlet of the fan 2100, which can effectively reduce noise and minimize the impact on the performance of the fan 2100.

[0041] The silencer structure 1000 includes an inner tube 1100 and a cover shell 1200. The inner tube 1100 can be made of metal material or other materials. The inner tube 1100 is in the shape of a hollow tube, that is, the tube wall 1130 of the inner tube 1100 is surrounded by a channel for airflow transmission. The cover shell 1200 is designed to surround the inner tube 1100. The cover shell 1200 and the inner tube 1100 are fixed to each other, so that a cavity 1300 is surrounded by the cover shell 1200 and the inner tube 1100. A through hole 1110 is provided on the tube wall 1130 of the inner tube 1100, and the through hole 1110 connects the cavity 1300. Since the through hole 1110 is provided on the tube wall 1130 of the inner tube 1100, the through hole 1110 connects the cavity 1300 with the internal space of the inner tube 1100. When the silencer structure 1000 is installed at the outlet of the fan 2100, the airflow discharged from the fan 2100 enters the inner tube 1100 and is transmitted along the inner tube 1100. Along with the transmission of the airflow, the noise enters the cavity 1300 through the through hole 1110, interacts with the cavity 1300 to resonate, thereby consuming the sound energy of the noise and reducing the noise.

[0042] In the related art, noise reduction is mainly achieved by reducing the rotation speed of the fan 2100. However, after the rotation speed of the fan 2100 is reduced, the air volume will become smaller, resulting in a poor exhaust effect. For example, the range hood cannot exhaust the oil smoke to the outside world well. In this embodiment, noise reduction is carried out simultaneously in the process of transmitting the airflow. While reducing the noise, the airflow is still transmitted through the inner tube 1100. Compared with the related art, under the premise of providing the same air volume, the noise in this embodiment is lower, and under the premise of providing the same noise level, the air volume of this embodiment is larger. In other words, by setting the noise structure, noise reduction can be achieved without reducing the airflow velocity, thereby minimizing the impact on the performance of the fan 2100.

[0043] Combination Figure 5 and Figure 6 As shown, in some embodiments, the tube wall 1130 of the inner tube 1100 is provided with a through hole row 1120, and the through hole row 1120 includes a plurality of through holes 1110, and the plurality of through holes 1110 are arranged along the axial direction of the inner tube 1100, and the plurality of through holes 1110 are designed to be arranged alternately, that is, the through hole row 1120 extends along the axial direction of the inner tube 1100. As the noise propagates, a part of the noise enters the cavity 1300 through the through holes 1110 close to the outlet of the fan 2100, and the noise that does not have time to enter the cavity 1300 from the through holes 1110 close to the outlet of the fan 2100 can enter the cavity 1300 through the through holes 1110 far from the outlet of the fan 2100. By such a configuration, more noise can enter the cavity 1300, thereby further improving the noise reduction effect.

[0044] Further, continue to combine Figure 5 and Figure 6 As shown, in some embodiments, there are multiple through hole rows 1120, where multiple means two or more, and the multiple through hole rows 1120 are designed to be alternately arranged along the circumference of the inner tube 1100. It can be understood that when the airflow is transmitted along the inner tube 1100, the airflow almost occupies the entire space in the inner tube 1100. In this embodiment, by providing alternately arranged through hole rows 1120 on the circumference of the inner tube 1100, noise can enter the cavity 1300 from more directions, so that the silencing effect can be improved within a limited space range, which is conducive to reducing the space occupied by the silencing structure 1000.

[0045] Combination Figure 8As shown, in some embodiments, along the axial direction of the inner tube 1100, the inner tube 1100 includes a top 1131, a bottom 1132, a left side 1133 and a right side 1134. For example, the outlet of the fan 2100 is open in the horizontal direction, and the muffler structure 1000 is roughly installed in the horizontal direction to the outlet of the fan 2100. This solution is suitable for the form of the integrated stove 4000. In this case, along the axial direction of the inner tube 1100, the inner tube 1100 includes a top 1131, a bottom 1132, a left side 1133 and a right side 1134. It can be understood that the inner tube 1100 can be an integrally formed structure, and the top 1131, the bottom 1132, the left side 1133 and the right side 1134 are artificially divided parts.

[0046] Taking the exhaust device 2000 as a range hood as an example, the through hole 1110 is set to the top 1131, the left side 1133 and / or the left side 1133, that is, the bottom 1132 does not need to be provided with a through hole 1110. When oil stains adhere to the tube wall 1130 of the inner tube 1100, the oil stains will flow downward to the bottom 1132 under the action of gravity, thereby reducing the risk of oil stains entering the top 1131, the left side 1133 and / or the through holes 1110 on the left side 1133 and reducing the risk of oil stains entering the cavity 1300. If the oil stains block the through hole 1110, the noise will be prevented from entering the cavity 1300 through the through hole 1110. When the oil stains enter the cavity 1300, it will affect the resonance of the cavity 1300 and the noise. Through such a setting, the adverse effect on the noise reduction effect of the sound-absorbing structure 1000 can be minimized.

[0047] Furthermore, combined with Figure 4 and Figure 7 As shown, in some embodiments, the bottom 1132 is inclined relative to the horizontal plane toward the air inlet end or the air outlet end of the inner tube 1100, so that the oil accumulated at the bottom 1132 of the inner tube 1100 under the action of gravity flows toward the air inlet end or the air outlet end and then discharged from the inner tube 1100.

[0048] For example, the air inlet end of the inner tube 1100 is connected to the outlet of the fan 2100, so the bottom 1132 is inclined relative to the horizontal plane toward the air inlet end of the inner tube 1100, so that the oil can be discharged to the volute of the fan 2100. Generally speaking, the volute of the fan 2100 has an oil leakage hole, and the oil is discharged through the oil leakage hole and enters the oil collection box. For another example, the air outlet end of the inner tube 1100 is connected to the exhaust pipe 2200 (described in detail below), and the bottom 1132 is inclined relative to the horizontal plane toward the air outlet end of the inner tube 1100, so that the oil can be discharged to the exhaust pipe 2200.

[0049] Combination Figure 7As shown, in some embodiments, the cover shell 1200 includes a surrounding plate portion 1230, a first ring portion 1210 and a second ring portion 1220, the first ring portion 1210 surrounds the inner tube 1100, the second ring portion 1220 surrounds the inner tube 1100, the surrounding plate portion 1230 surrounds the inner tube 1100, and the inner tube 1100, the first ring portion 1210, the second ring portion 1220 and the surrounding plate portion 1230 jointly enclose a cavity 1300.

[0050] For example, the first ring portion 1210 is arranged on the inner tube 1100 and protrudes relative to the inner tube 1100 along the radial direction of the inner tube 1100, the second ring portion 1220 is arranged on the inner tube 1100 and protrudes relative to the inner tube 1100 along the radial direction of the inner tube 1100, one end of the surrounding plate portion 1230 is arranged on the first ring portion 1210 and the other end is arranged on the second ring portion 1220 so as to surround the inner tube 1100, and through the arrangement of the first ring portion 1210 and the second ring portion 1220, the surrounding plate portion 1230 is spaced a certain distance from the inner tube 1100 so as to form a cavity 1300.

[0051] Continue to combine Figure 7 As shown, in some embodiments, the first ring portion 1210, the second ring portion 1220 and the apron portion 1230 constitute a closed wall of the cavity 1300. The so-called closed wall means that the first ring portion 1210, the second ring portion 1220 and the apron portion 1230 do not have a hole structure for airflow to pass through (the gaps formed between the first ring portion 1210 and the inner tube 1100, between the second ring portion 1220 and the inner tube 1100, between the first ring portion 1210 and the apron portion 1230, between the second ring portion 1220 and the apron portion 1230 due to assembly are not considered as hole structures). By setting it in this way, after the noise enters the cavity 1300, almost all of the noise energy resonates with the cavity 1300 and consumes sound energy, and the noise is prevented from leaking out from the hole structure on the first ring portion 1210, the second ring portion 1220 or the apron portion 1230 as much as possible.

[0052] Continue to combine Figure 7 As shown, in some embodiments, the inner tube 1100, the first ring portion 1210 and the second ring portion 1220 are designed to be integrally formed, for example, the inner tube 1100, the first ring portion 1210 and the second ring portion 1220 are made of plastic and are prepared by injection molding, and of course, other materials can also be used. It is understandable that when the inner tube 1100, the first ring portion 1210 and the second ring portion 1220 are integrally formed, the enclosing plate portion 1230 is an independent component, and the enclosing plate portion 1230 needs to be connected to the first ring portion 1210 and the second ring portion 1220 by connecting means.

[0053] In other embodiments, the first ring portion 1210, the second ring portion 1220 and the apron portion 1230 can be formed as one piece (i.e., the housing 1200 is a separate component). Then, when the housing 1200 and the inner tube 1100 are assembled, the inner tube 1100 needs to pass from one end of the housing 1200 to the other end. When the inner tube 1100 passes to the other end, it may be difficult to align and cannot pass smoothly (get stuck). In this embodiment, the first ring portion 1210 and the second ring portion 1220 are designed to be formed as one piece with the inner tube 1100, and the apron portion 1230 includes a first half shell 1231 and a second half shell 1232. The first half shell 1231 and the second half shell 1232 are relatively connected to facilitate assembly.

[0054] Combination Fig. 9 As shown, in this embodiment, the aperture of the through hole 1110 is D, and the value range of D is 1.8mm-2.4mm, for example, D is 1.8mm, 2.0mm, 2.2mm or 2.4mm, the thickness of the tube wall 1130 of the inner tube 1100 is T1, and the value range of T1 is 0.8mm-1.2mm, for example, T1 is 0.8mm, 1.0mm or 1.2mm, and the radial thickness of the cavity 1300 along the inner tube 1100 is T2, and the value range of T2 is 10mm-70mm, for example, T2 is 10mm, 20mm, 30mm, 40mm, 50mm, 60mm or 70mm. By adjusting D, T1 and T2, the noise in the frequency band of 700Hz-1700Hz is effectively eliminated, and the noise in this frequency band is the part with the largest noise sound energy, which greatly improves the overall noise reduction effect.

[0055] Based on GB / T 17713-2022 Range hoods and other cooking smoke exhaust devices, Examples 1 to 3 and Comparative Example 1 were tested. In Example 1, D is 1.8 mm, T1 is 0.8 mm, and T2 is 10 mm. In Example 2, D is 2 mm, T1 is 1 mm, and T2 is 30 mm. In Example 3, D is 2.4 mm, T1 is 1.2 mm, and T2 is 70 mm. Comparative Example 1 does not have a muffler structure 1000. At an air volume of 18 m 3 / min, the noise performance in the 700Hz~1700Hz frequency band is as shown in the following table, which shows that the application scheme can effectively reduce the noise:

[0056] project RMS (effective noise value) Example 1 62.6dB(A) Example 2 61.15dB(A) Example 3 62.1dB(A) Comparative Example 1 63.6dB(A)

[0057] The second aspect of the present application further discloses an exhaust device 2000, for example, the exhaust device 2000 is a range hood, and the exhaust device is used to extract the airflow in the kitchen and discharge it to the outside. Figure 2 and Figure 3As shown, the exhaust device 2000 includes a fan 2100 and the above-mentioned silencer structure 1000, the silencer structure 1000 is arranged at the outlet of the fan 2100, the silencer structure 1000 includes an inner tube 1100 and a cover shell 1200, the inner tube 1100 is connected with the outlet of the fan 2100, the airflow output by the fan 2100 is transmitted through the inner tube 1100, the tube wall 1130 of the inner tube 1100 is provided with a through hole 1110, the cover shell 1200 is designed to surround the inner tube 1100, so that a cavity 1300 is formed between the cover shell 1200 and the inner tube 1100, and the through hole 1110 needs to be connected with the cavity 1300.

[0058] The inner tube 1100 can be made of metal material or other materials. The inner tube 1100 is in the shape of a hollow tube, that is, the tube wall 1130 of the inner tube 1100 is provided with a channel for airflow transmission. The cover shell 1200 is designed to surround the inner tube 1100. The cover shell 1200 and the inner tube 1100 are fixed to each other, so that a cavity 1300 is surrounded by the cover shell 1200 and the inner tube 1100. A through hole 1110 is provided on the tube wall 1130 of the inner tube 1100, and the through hole 1110 connects the cavity 1300. Since the through hole 1110 is provided on the tube wall 1130 of the inner tube 1100, the through hole 1110 connects the cavity 1300 with the internal space of the inner tube 1100. When the silencer structure 1000 is installed at the outlet of the fan 2100, the airflow discharged by the fan 2100 enters the inner tube 1100 and is transmitted along the inner tube 1100. Along the transmission of the airflow, the noise enters the cavity 1300 through the through hole 1110, interacts with the cavity 1300 to resonate, thus consuming the acoustic energy of the noise, thereby reducing the noise. It can be understood that the silencer structure 1000 of the exhaust device 2000 of this embodiment adopts the technical solution of the above embodiment, and therefore has at least the beneficial effects brought by the technical solution of the above embodiment, which will not be repeated here.

[0059] In some embodiments, the muffler structure 1000 is configured to be detachable, that is, the muffler structure 1000 can be installed at a predetermined position or removed from a predetermined position. It is understandable that, due to the presence of through holes 1110 in the inner tube 1100, after the exhaust device 2000 is used for a long time, some of the through holes 1110 may be blocked by oil, or the oil may enter the cavity 1300. When the oil blocks the through holes 1110, the noise cannot enter the cavity 1300 through the blocked through holes 1110. When the oil enters the cavity 1300, it will affect the resonance between the cavity 1300 and the noise, thereby reducing the noise reduction effect. For this reason, in this embodiment, the muffler structure 1000 is designed to be detachable. When it is found that the noise reduction effect is weakened or after a period of use, the muffler structure 1000 can be disassembled for cleaning, and then the cleaned muffler structure 1000 can be installed back to the outlet of the fan 2100. By setting it in this way, the noise reduction effect of the muffler structure 1000 can be restored.

[0060] Combination Figure 2 and Figure 3 As shown, in some embodiments, the exhaust device 2000 also includes an exhaust duct 2200, which is used to connect to the silencer structure 1000, that is, the silencer structure 1000 is arranged between the fan 2100 and the exhaust duct 2200, and one end of the inner tube 1100 is connected to the exhaust duct 2200, and the other end of the inner tube 1100 is connected to the outlet of the fan 2100.

[0061] Specifically, the exhaust device 2000 is generally installed indoors. Taking the exhaust device 2000 as a range hood as an example, the exhaust device 2000 is installed in the kitchen, and the silencer structure 1000 is at the outlet of the fan 2100. Since the silencer structure 1000 is not convenient to directly cooperate with the public flue, in order to achieve the connection between the silencer structure 1000 and the public flue, in this embodiment, an exhaust duct 2200 is provided. For example, the exhaust duct 2200 is a corrugated pipe. The exhaust duct 2200 is connected to the silencer structure 1000. The airflow output by the fan 2100 enters the inner tube 1100 for transmission, and then enters the exhaust duct 2200, and enters the public flue from the exhaust duct 2200.

[0062] One of the ends of the inner tube 1100 is exposed relative to the cover shell 1200 along the axial direction of the inner tube 1100, and the connection between the exhaust duct 2200 and the silencer structure 1000 is achieved by plugging the exhaust duct 2200 and the inner tube 1100 together. The exhaust duct 2200 can be inserted into the corresponding end of the inner tube 1100 to achieve the connection between the exhaust duct 2200 and the inner tube 1100, or the exhaust duct 2200 can be sleeved onto the corresponding end of the inner tube 1100 to achieve the connection between the exhaust duct 2200 and the inner tube 1100. The plug-in connection between the exhaust duct 2200 and the inner tube 1100 facilitates the installation and coordination of the exhaust duct 2200 and the silencer structure 1000.

[0063] The first ring portion 1210 of the silencer structure 1000 is designed to be connected to the fan 2100, and the second ring portion 1220 of the silencer structure 1000 is designed to abut against the exhaust duct 2200 when the exhaust duct 2200 is plugged and connected to the inner tube 1100, thereby achieving assembly between the fan 2100, the silencer structure 1000 and the exhaust duct 2200.

[0064] For example, the first ring portion 1210 is arranged on the end surface of one end of the inner tube 1100 and is flush with the end surface of one end of the inner tube 1100, and the other end of the inner tube 1100 is exposed from the cover shell 1200. When the fan 2100, the silencer structure 1000 and the exhaust duct 2200 are connected and assembled, the first ring portion 1210 is connected to the fan 2100, so that the silencer structure 1000 and the fan 2100 are connected and fixed together. Since the first ring portion 1210 is located on the end surface of one end of the inner tube 1100, the inner tube 1100 does not need to be inserted into the interior of the fan 2100 to affect the air performance of the fan 2100. The exhaust duct 2200 is sleeved onto the other end of the inner tube 1100. Since the other end of the inner tube 1100 is exposed from the cover shell 1200, the second ring portion 1220 can block and position the exhaust duct 2200, that is, the exhaust duct 2200 is blocked by the second ring portion 1220 when it is sleeved onto the inner tube 1100 to the extreme position.

[0065] The third aspect of the present application discloses an integrated stove 4000, Figure 1 The integrated stove 4000 includes a stove 3000 and the exhaust device 2000. The stove 3000 and the exhaust device 2000 are integrated together. The stove 3000 is a device for cooking food. When the stove 3000 cooks food, oil smoke is generated. The exhaust device 2000 sucks the oil smoke and discharges it to the outside. The exhaust device 2000 of the integrated stove 4000 in this embodiment adopts the technical solution of the above embodiment, so it has at least the beneficial effects brought by the technical solution of the above embodiment, which will not be repeated here.

[0066] Furthermore, combined with Figure 1As shown, the outlet of the fan 2100 is open in the horizontal direction. For example, with the orientation of the integrated stove 4000 installed in the kitchen as a reference, when the user uses the integrated stove 4000, the side of the integrated stove 4000 close to the user is the front, the side away from the user is the back, the side corresponding to the user's left hand is the left, the side corresponding to the user's right hand is the right, the side close to the ground is the bottom, and the side away from the ground is the top. The outlet of the fan 2100 is open to the left or right side, and the muffler structure 1000 is roughly installed to the outlet of the fan 2100 in the horizontal direction, and then connected to the exhaust pipe 2200 to discharge the oil smoke.

[0067] The above description is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. All equivalent structural changes made based on the concept of the present application and the contents of the present application description and drawings, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A sound-absorbing structure (1000), characterized in that: include: An inner tube (1100) adapted to allow airflow to pass through, wherein a tube wall (1130) of the inner tube (1100) is provided with a through hole (1110); and The cover shell (1200) surrounds the inner tube (1100) to form a cavity (1300) between the cover shell and the inner tube (1100), and the cavity (1300) is communicated with the through hole (1110).

2. The sound-absorbing structure (1000) according to claim 1, characterized in that: The tube wall (1130) of the inner tube (1100) is provided with a through hole row (1120), and the through hole row (1120) includes a plurality of through holes (1110) arranged alternately along the axial direction of the inner tube (1100).

3. The sound-absorbing structure (1000) according to claim 2, characterized in that: The plurality of through hole rows (1120) are arranged alternately along the circumference of the inner tube (1100).

4. The sound-absorbing structure (1000) according to claim 1, characterized in that: When observed along the axial direction of the inner tube (1100), the tube wall (1130) of the inner tube (1100) includes a top (1131), a bottom (1132), a left side (1133) and a right side (1134), and the through hole (1110) is provided at the top (1131), the left side (1133) and / or the right side (1134).

5. The sound-absorbing structure (1000) according to claim 4, characterized in that: The bottom (1132) faces the air inlet end or the air outlet end of the inner tube (1100) and is inclined relative to a horizontal plane.

6. The sound-absorbing structure (1000) according to claim 1, characterized in that: The cover shell (1200) includes a first ring portion (1210), a second ring portion (1220) and a surrounding plate portion (1230) surrounding the inner tube (1100), and the surrounding plate portion (1230) is arranged between the first ring portion (1210) and the second ring portion (1220).

7. The sound-absorbing structure (1000) according to claim 6, characterized in that: The enclosure portion (1230), the first ring portion (1210) and the second ring portion (1220) constitute a closed wall of the cavity (1300).

8. The sound-absorbing structure (1000) according to claim 6, characterized in that: The first ring portion (1210), the second ring portion (1220) and the inner tube (1100) are integrally formed, and the enclosure portion (1230) includes a first half shell (1231) and a second half shell (1232) that are connected to each other, the first half shell (1231) is respectively connected to the first ring portion (1210) and the second ring portion (1220), and the second half shell (1232) is respectively connected to the first ring portion (1210) and the second ring portion (1220).

9. The sound-absorbing structure (1000) according to claim 1, characterized in that: The aperture of the through hole (1110) is 1.8 mm to 2.4 mm; and / or the thickness of the tube wall (1130) of the inner tube (1100) is 0.8 mm to 1.2 mm; and / or the thickness of the cavity (1300) along the radial direction of the inner tube (1100) is 10 mm to 70 mm.

10. An exhaust device (2000), characterized in that: It comprises a fan (2100) and the sound-absorbing structure (1000) according to any one of claims 1 to 9, wherein the inner tube (1100) is connected to an outlet of the fan (2100).

11. The exhaust device (2000) according to claim 10, characterized in that: The sound-absorbing structure (1000) is configured to be detachable.

12. The exhaust device (2000) according to claim 11, characterized in that: The exhaust device (2000) also includes an exhaust pipe (2200), and the inner pipe (1100) is connected to the outlet of the fan (2100) and the exhaust pipe (2200); the first ring portion (1210) of the silencer structure (1000) is suitable for connection with the fan (2100), one end of the inner pipe (1100) is exposed from the cover shell (1200) to be suitable for the exhaust pipe (2200) to be installed, and the second ring portion (1220) of the silencer structure (1000) is suitable for abutting against the exhaust pipe (2200) when the exhaust pipe (2200) is installed on the inner pipe (1100).

13. An integrated stove (4000), characterized in that: It comprises a stove (3000) and the exhaust device (2000) according to any one of claims 10 to 12, wherein the outlet of the fan (2100) of the exhaust device (2000) is open in the transverse direction.

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