Silencer and oxygen generator

Abstract

The present application relates to a silencer and an oxygen generator. The silencer includes at least one sound-absorbing structure, and the sound-absorbing structure is arranged at the air inlet and / or the air outlet of the main body of the noise reduction target. Among them, a plurality of sound-absorbing cavities are formed in the sound-absorbing structure, and at least part of the sound-absorbing cavities are connected in series to form a sound-absorbing channel. The sound-absorbing structure forms an air flow inlet and an air flow outlet communicating with the sound-absorbing channel at both ends of the sound-absorbing channel, and the air flow inlet communicates with the air outlet or the air flow outlet communicates with the air inlet. The above-mentioned silencer includes a sound-absorbing structure formed with a plurality of sound-absorbing cavities, and connects the sound-absorbing structure to the air inlet and the air outlet of the main body. For the noise generated by the noise reduction target and diffused outward along the air flow from the air inlet and the air outlet, after entering the sound-absorbing structure from the air inlet and the air outlet, it is gradually transmitted between different sound-absorbing cavities along the sound-absorbing channel. During the process of the noise being gradually transmitted, the noise will be gradually absorbed and dissipated by the sound-absorbing cavities and continuously weakened, thereby achieving the effect of reducing the operating noise.

Description

Technical Field

[0001] The present application relates to the technical field of oxygen generating equipment, and particularly to a silencer and an oxygen generator. Background Art

[0002] With the continuous improvement of people's living standards, the demand for health has gradually increased, and oxygen inhalation has gradually become an important means in family and community rehabilitation. Because inhaling pure oxygen can promote blood circulation, make the mind fresh, eliminate fatigue, and effectively improve work efficiency.

[0003] According to research, the operating noise of most oxygen generators on the market is usually about 60 dB. When placed indoors at night, the noise will make people irritable, affect sleep, and seriously affect the oxygen therapy experience. Therefore, the size of the noise is a core issue for evaluating an oxygen generator, and reducing the noise of the oxygen generator has become an urgent need to improve product quality and enhance market competitiveness. Summary of the Invention

[0004] Based on this, in view of the problem that the operating noise of the above-mentioned oxygen generator affects the use experience, it is necessary to provide a silencer and an oxygen generator that can reduce the operating noise.

[0005] A silencer, the silencer includes at least one sound absorption structure, and the sound absorption structure is arranged at the air inlet and / or the air outlet of the host of the noise reduction target;

[0006] Wherein, a plurality of sound absorption cavities are formed in the sound absorption structure, and at least part of the sound absorption cavities are connected in series to form a sound absorption channel. The sound absorption structure forms an air flow inlet and an air flow outlet that communicate with the sound absorption channel at both ends of the sound absorption channel, and the air flow inlet communicates with the air outlet or the air flow outlet communicates with the air inlet.

[0007] The above-mentioned silencer includes a sound absorption structure formed with a plurality of sound absorption cavities, and connects the sound absorption structure to the air inlet and the air outlet of the host. For the noise generated by the noise reduction target and diffused outward by the air flow from the air inlet and the air outlet, after it enters the sound absorption structure from the air inlet and the air outlet through the air flow inlet and the air flow outlet, it is gradually transmitted between different sound absorption cavities along the sound absorption channel. During the gradual transmission of the noise, the noise will be gradually absorbed and dissipated by the sound absorption cavities and continuously weakened, thereby achieving the effect of reducing the operating noise.

[0008] In one embodiment, in the series direction pointing to the air flow outlet, the volumes of all the sound absorption cavities forming the sound absorption channel gradually increase one by one.

[0009] In one embodiment, the sound absorption channel extends reciprocally and circuitously.

[0010] In one embodiment, the sound absorption channel is formed by at least three of the sound absorption cavities connected in series. All the sound absorption cavities are arranged adjacent to each other in a first direction, and the longitudinal directions of all the sound absorption cavities are parallel to each other and perpendicular to the first direction.

[0011] The sound absorption cavity located between two of the sound absorption cavities is communicated with one adjacent sound absorption cavity at one end in its own longitudinal direction and with the other adjacent sound absorption cavity at the other end in its own longitudinal direction.

[0012] In one embodiment, all the sound absorption structures include an intake sound absorption structure and an exhaust sound absorption structure. The intake sound absorption structure is provided at the intake port. The intake sound absorption structure is communicated with the intake port through the air flow outlet. The exhaust sound absorption structure is provided at the exhaust port. The exhaust sound absorption structure is communicated with the exhaust port through the air flow inlet.

[0013] In one embodiment, the muffler further includes a hood housing. The hood housing covers the main body. The intake sound absorption structure and the exhaust sound absorption structure are respectively provided on both sides of the hood housing.

[0014] In one embodiment, the air flow outlet at the end of the exhaust sound absorption structure in its own sound absorption channel is configured as a dispersion hole group. The dispersion hole group includes a plurality of breathable small holes.

[0015] In one embodiment, the muffler further includes a base. The main body is provided on the base. The hood housing covers the main body and is connected to the base.

[0016] The muffler further includes a fan. The fan is provided on the top of the hood housing and is used to send air to the base. The base is formed with an air discharge port. The dispersion hole group is configured on the side of the exhaust sound absorption structure facing the inside of the hood housing.

[0017] In one embodiment, the muffler further includes a sound absorption member. The sound absorption member is made of a sound absorption material and is provided in each of the sound absorption cavities.

[0018] In one embodiment, the sound absorption structure includes a structure body and a cover plate. The cover plate covers the structure body and together encloses the plurality of sound absorption cavities.

[0019] In one embodiment, the sound absorption members are covered on both inner walls of the structure body and the cover plate facing each other, and the sound absorption members covered on the two inner walls are spaced apart from each other.

[0020] In one embodiment, one of the structure body and the cover plate is configured with a buckle, and the other is configured with a slot cooperating with the buckle.

[0021] In one embodiment, the silencer further includes a sealing ring disposed at the connection between the structural body and the cover plate.

[0022] In one embodiment, the sound-absorbing structure is configured with a tapered pipe head, and the air flow inlet is formed within the tapered pipe head.

[0023] An oxygen generator includes the above silencer. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic structural diagram of an oxygen generator with a silencer in an embodiment of the present application.

[0026] Figure 2 It is Figure 1 Another perspective structural diagram of the illustrated oxygen generator.

[0027] Figure 3 It is Figure 2 A cross-sectional schematic diagram of the illustrated oxygen generator at A-A.

[0028] Figure 4 It is Figure 1 Another perspective structural diagram of the illustrated oxygen generator.

[0029] Figure 5 It is Figure 4 A cross-sectional schematic diagram of the illustrated oxygen generator at B-B.

[0030] Figure 6 It is Figure 5 An enlarged structural schematic diagram of the illustrated oxygen generator at D.

[0031] Figure 7 It is Figure 1 An exploded structural schematic diagram of the illustrated oxygen generator.

[0032] Figure 8 It is Figure 1 A schematic structural diagram of the sound-absorbing structure and the base of the illustrated oxygen generator with the cover plate and the sound-absorbing member hidden.

[0033] Figure 9 It is Figure 8 Another perspective structural diagram of the sound-absorbing structure and the base shown.

[0034] Figure 10 Another schematic diagram of the soundproof structure and the base shown in the figure, from another angle. Figure 8 Another schematic diagram of the soundproof structure and the base shown in the figure, from another angle.

[0035] Figure 11 Another schematic diagram of the middle cover plate of the oxygen generator shown in the figure. Figure 1 Another schematic diagram of the middle cover plate of the oxygen generator shown in the figure.

[0036] Figure 12 Another schematic diagram of the cover plate shown in the figure, from another angle. Figure 11 Another schematic diagram of the cover plate shown in the figure, from another angle.

[0037] Figure 13 Another schematic diagram of the cover plate shown in the figure, from another angle. Figure 11 Another schematic diagram of the cover plate shown in the figure, from another angle.

[0038] Explanation of reference numerals in the drawings: 100, oxygen generator; 10, silencer; 11, soundproof structure; 111, conical pipe head; 113, structure body; 1131, partition structure; 1133, card slot; 115, cover plate; 1151, buckle; 117, intake soundproof structure; 119, exhaust soundproof structure; 13, soundproof part; 15, sealing ring; 17, machine cover shell; 171, upper cover; 30, base; 50, fan; J, air inlet; C, air outlet; Q, soundproof cavity; T, through hole; M, diffusion hole group. Detailed implementation manners

[0039] In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0040] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0041] In addition, the term "and / or" is merely a description of the association relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this text, the character " / " generally indicates that the associated objects before and after are in an "or" relationship. The terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" can explicitly or implicitly include at least one such feature. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In this application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be construed in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0044] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0045] Please refer to Figures 1 to 3, an embodiment of the present application provides a silencer 10, including at least one sound-absorbing structure 11, and the sound-absorbing structure 11 is arranged at the air inlet and / or the exhaust port of the host of the noise reduction target. Wherein, a plurality of sound-absorbing cavities Q are formed in the sound-absorbing structure 11, and at least part of the sound-absorbing cavities Q are connected in series to form a sound-absorbing channel. The sound-absorbing structure 11 forms an air flow inlet J and an air flow outlet C for communicating with the sound-absorbing channel at both ends of the sound-absorbing channel, and the air flow inlet J communicates with the exhaust port or the air flow outlet C communicates with the air inlet.

[0046] It can be understood that the noise reduction target is the target with a noise source for which the silencer 10 performs noise reduction. The silencer 10 may have only one sound-absorbing structure 11, and arrange it at the air inlet of the host, so that its air flow outlet C communicates with the air inlet, or arrange it at the exhaust port of the host, so that its air flow inlet J communicates with the exhaust port. The silencer 10 may also include at least two sound-absorbing structures 11, so that both the air inlet and the exhaust port of the host are provided with sound-absorbing structures 11. Among them, the noise reduction target may be, but is not limited to, equipment such as an oxygen generator 100 with an air inlet and / or an exhaust port, and no specific limitation is made here.

[0047] Taking the oxygen generator 100 as an example below, to achieve its normal function, the oxygen generator 100 includes a host, a filter (not shown in the figure), etc. The host is used to realize the oxygen generation function, and specifically includes a conventional compressor (not shown in the figure), a molecular sieve (not shown in the figure), etc. During the oxygen generation work, the air filtered by the filter enters the host from the air inlet, passes through the compressor and the molecular sieve, and the separated nitrogen is discharged as waste gas from the exhaust port of the host.

[0048] Each sound-absorbing structure 11 forms a plurality of sound-absorbing cavities Q, and part or all of the sound-absorbing cavities Q together form a sound-absorbing channel, and at both ends of the sound-absorbing channel, that is, at the two sound-absorbing cavities Q at the head and tail, an air flow inlet J and an air flow outlet C are respectively formed. The sound-absorbing channel allows air flow to pass through. The air flow can flow into the sound-absorbing channel from the air flow inlet J, and be transmitted step by step therein, flowing through all the sound-absorbing cavities Q in sequence, and then flowing out of the sound-absorbing channel from the air flow outlet C. For the air inlet provided with the sound-absorbing structure 11, after being filtered, the air will first flow through the sound-absorbing channel inside the sound-absorbing structure 11, and then flow into the air inlet of the host from its air flow outlet C. For the exhaust port provided with the sound-absorbing structure 11, the waste gas such as nitrogen generated by the host will be discharged from the exhaust port to the sound-absorbing channel of the sound-absorbing structure 11 through the air flow inlet J, and then discharged from the air flow outlet C of the sound-absorbing structure 11.

[0049] It can be understood that the air inlet and the exhaust port may be respectively provided with the sound-absorbing structure 11, or only one of them may be provided with the sound-absorbing structure 11. Each sound-absorbing channel may be formed by connecting two, three, four or more than four sound-absorbing cavities Q in series, and no specific limitation is made here.

[0050] The noise that enters the soundproof structure 11 will also be transmitted along the soundproof channel host in different soundproof cavities Q, where the noise will be emitted and collided within the soundproof cavity Q, and then absorbed and dissipated in the form of heat energy.

[0051] The above-mentioned muffler 10 includes a soundproof structure 11 formed with multiple soundproof cavities Q, and connects the soundproof structure 11 to the air inlet and exhaust port of the host. For the noise generated by the noise reduction target and diffused outward by the air flow from the air inlet and exhaust port, after it enters the soundproof structure 11 through the air flow inlet J and air flow outlet C from the air inlet and exhaust port, it is transmitted step by step between different soundproof cavities Q along the soundproof channel. During the step-by-step transmission of the noise, the noise will be absorbed and dissipated step by step by the soundproof cavity Q, and continuously weakened, thereby achieving the effect of reducing the operating noise.

[0052] Furthermore, the soundproof structure 11 is configured with a conical pipe head 111, and the air flow inlet J is formed within the conical pipe head 111.

[0053] It can be understood that the conical pipe head 111 is a hollow pipe with at least the outer diameter of one end deviating from the soundproof cavity Q shrinking, and its hollow interior forms the air flow inlet J. The oxygen generator 100 also includes an air delivery pipe (not shown in the figure), and the soundproof structure 11 is connected to other structures (such as: filter, host, etc.) through the air delivery pipe, and the air flow is transferred between different structures through the air delivery pipe. Among them, the air delivery pipe can be a silica gel pipe.

[0054] The conical pipe head 111 is convenient for plugging and unplugging cooperation with an air delivery pipe such as a silica gel pipe. The air delivery pipe such as a silica gel pipe is sleeved on the conical pipe head 111, and the formed sealing with the air flow inlet J is relatively good, which helps to fully introduce the air flow into the soundproof structure 11 for noise reduction and soundproofing.

[0055] In some embodiments, in the series direction pointing to the air flow outlet C, the volumes of all the soundproof cavities Q forming the soundproof channel increase one by one, that is, in the direction close to the air flow outlet C of the soundproof channel, the volumes of its soundproof cavities Q increase step by step, and the soundproof channel shows a multi-stage soundproof cavity Q structure with progressive volume.

[0056] In other words, in the air flow direction (as shown by the arrow in Figure 3 ) where the air flow flows from the air flow inlet J to the air flow outlet C, among two adjacent soundproof cavities Q, the volume of the soundproof cavity Q located upstream is larger than the volume of the soundproof cavity Q located downstream. All the soundproof cavities Q are connected in sequence, the volume increases one by one, and the volume of the soundproof cavity Q with the air flow inlet J at the head end is the smallest, and the volume of the soundproof cavity Q with the air flow outlet C at the tail end is the largest.

[0057] In the same thickness direction of all the soundproof cavities Q (corresponding to Figure 3On the premise that the thickness (in the direction perpendicular to the paper surface) of the sound-absorbing cavity Q is consistent, the gradual increase in the volume of the sound-absorbing cavity Q can be specifically manifested as the gradual increase in the cross-sectional area perpendicular to the thickness direction. Taking the example that four sound-absorbing cavities Q: sound-absorbing cavity Q1, sound-absorbing cavity Q2, sound-absorbing cavity Q3, and sound-absorbing cavity Q4 are successively formed in the series direction of the sound-absorbing structure 11 pointing to the air flow outlet C, their volumes are V1, V2, V3, V4 in sequence, and the cross-sectional areas perpendicular to the thickness direction are S1, S2, S3, S4 in sequence, then V1 < V2 < V3 < V4, and S1 < S2 < S3 < S4.

[0058] When the gas enters from the air flow inlet J and successively passes through the multi-stage sound-absorbing cavities Q of the sound-absorbing channel, the noise can be reduced through the expansion ratio of the cavity. The reason is as follows:

[0059] According to the noise reduction formula: ΔL = 10lg[1 + 1 / 4·(m - 1 / m)·sin2(kl)];

[0060] ΔL - - sound reduction; m - - expansion ratio; m = S n / S 通 , S 通 and S n are respectively the cross-sectional areas perpendicular to the same direction of the through hole T and the sound-absorbing cavity Q communicating with the through hole T and located downstream of it. Among them, S 通 is the diameter of the through hole T × the extended length of the through hole T, and S n is the cross-sectional area of the sound-absorbing cavity Q perpendicular to the thickness direction; k = 2πf / c, f is the natural wavelength of the noise, c is the period; l is the depth of the sound-absorbing cavity Q. It can be seen that when the values of k and l are fixed, the magnitude of the sound reduction is related to the expansion ratio m of the gas. When the sound reduction is determined, the expansion ratio can be inversely deduced according to the sound reduction formula, and the volume of the sound-absorbing cavity Q that meets the sound reduction requirements can be quantified and designed according to the expansion ratio.

[0061] Therefore, the sound-absorbing channel adopts a structure of volume progressive multi-stage sound-absorbing cavities Q. Each sound-absorbing cavity Q can form an expansion with the upstream through hole T connected to it, and the expansion ratio can be calculated according to the foregoing method to achieve progressive expansion, sound absorption and noise reduction, and effectively reduce noise.

[0062] In some embodiments, the sound-absorbing channel extends reciprocally and circuitously. In other words, adjacent sound-absorbing cavities Q are connected in a U shape, and the air flow directions in adjacent sound-absorbing cavities Q are opposite.

[0063] After the air flow enters the sound-absorbing channel, it will flow reciprocally along the sound-absorbing channel. The reciprocally and circuitously extending sound-absorbing channel can increase the travel of noise propagation and improve the noise reduction effect.

[0064] Further, the sound-absorbing channel is formed by at least three sound-absorbing cavities Q connected in series, and all the sound-absorbing cavities Q are along the first direction (corresponding to Figure 3They are arranged adjacent to each other in the X direction (in the figure), and the longitudinal directions of all the sound absorption cavities Q are parallel to each other and perpendicular to the first direction. The sound absorption cavity Q located between two sound absorption cavities Q is connected to one adjacent sound absorption cavity Q at one end in its own longitudinal direction, and is connected to the other adjacent sound absorption cavity Q at the other end in its own longitudinal direction.

[0065] The cavity wall structure of the sound absorption cavity Q has through holes T (as Figure 6 and Figure 8 shown), adjacent sound absorption cavities Q are connected through the through holes T, and the hole axes of adjacent through holes T are parallel but not collinear. It can be understood that the sound absorption cavity Q in the middle is respectively connected to two adjacent sound absorption cavities Q through two through holes T, and the two through holes T are respectively located on two side walls at both ends.

[0066] Preferably, the sound absorption cavity Q located at the head end of the sound absorption channel is connected to the air flow inlet J or the air flow outlet C through one end in the longitudinal direction, and a through hole T is formed at the other end opposite in the longitudinal direction to be connected to the adjacent sound absorption cavity Q.

[0067] In this way, the sound absorption cavity Q can form a connection with the adjacent sound absorption cavity Q in a staggered area, so that the formed sound absorption channel in series can form a reciprocating and circuitous extension.

[0068] Please refer to Figures 4 to 6 together. In some embodiments, the silencer 10 further includes a sound absorption member 13, and the sound absorption member 13 is made of a sound absorption material and is disposed in each sound absorption cavity Q.

[0069] It can be understood that the sound absorption material includes but is not limited to sponge, fiber material, foam material, etc. The sound absorption member 13 is disposed in each sound absorption cavity Q, but should not block the connectivity of the sound absorption channel. Therefore, the sound absorption material can be a breathable material, or the sound absorption member 13 only partially fills the sound absorption cavity Q, leaving sufficient air flow channels.

[0070] The sound absorption member 13 is disposed in the sound absorption cavity Q, and can absorb the noise propagating in the sound absorption cavity Q, enhancing the noise reduction effect of the silencer 10.

[0071] Please refer to Figures 7 to 13 together. Further, the sound absorption structure 11 includes a structure body 113 and a cover plate 115. The cover plate 115 covers the structure body 113, and they jointly enclose to form a plurality of sound absorption cavities Q.

[0072] It can be understood that the sound absorption cavity Q is formed by the splicing of the structure body 113 and the cover plate 115. The inner wall of the structure body 113 facing the cover plate 115 and / or the inner wall of the cover plate 115 facing the structure body 113 can protrude to form a partition structure 1131, and the partition structure 1131 divides to form adjacent sound absorption cavities Q. At the same time, the through hole T is opened on the partition structure 1131 to connect adjacent sound absorption cavities Q.

[0073] In this way, during assembly, the sound-absorbing member 13 can be installed first, and then the cover body can be covered on the structural body 113, and the assembly method is simple.

[0074] Furthermore, sound-absorbing members 13 are provided on both inner walls of the structural body 113 and the cover plate 115 facing each other, and the sound-absorbing members 13 provided on the two inner walls are spaced apart from each other.

[0075] In other words, a sound-absorbing member 13 is provided on the inner wall of the structural body 113 facing the cover plate 115, and a sound-absorbing member 13 is also provided on the inner wall of the cover plate 115 facing the structural body 113, and the sound-absorbing members 13 provided on both are spaced apart.

[0076] The sound-absorbing member 13 being provided on the structural body 113 and the cover plate 115 is equivalent to being provided on two opposite side walls of the sound-absorbing cavity Q at the same time, which can fully absorb noise. At the same time, a gap is left between the two for the air flow to pass through smoothly.

[0077] Even further, the muffler 10 further includes a sealing ring 15, and the sealing ring 15 is provided at the connection between the structural body 113 and the cover plate 115.

[0078] The sealing ring 15 can be a rubber ring, and the sealing ring 15 can enhance the sealing performance of the connection between the two, so that the sound-absorbing structure 11 has good sealing performance and reduces the possibility of leakage when the air flow passes through the sound-absorbing channel formed in its sound-absorbing cavity Q.

[0079] Even further, one of the structural body 113 and the cover plate 115 is configured with a buckle 1151, and the other is configured with a card slot 1133 that cooperates with the buckle 1151.

[0080] Specifically, a card slot 1133 is configured on each partition structure 1131 of the structural body 113, and the cover plate 115 is configured with buckles 1151 corresponding to the number and position of the card slots 1133. In addition, screw holes are configured on the periphery of the cover plate 115, and after being clamped on the structural body 113 through the cooperation of the buckles 1151 and the card slots 1133, it is further fixed on the structural body 113 by screws. It can be understood that in some other embodiments, the structural body 113 and the cover plate 115 can also be connected by other means such as bonding and welding, which are not specifically limited herein.

[0081] The cooperation mode formed by the buckle 1151 and the card slot 1133 is simple and the operation is convenient, and it can quickly form a positioning connection between the structural body 113 and the cover plate 115.

[0082] In some embodiments, the entire sound insulation structure 11 includes an intake sound insulation structure 117 and an exhaust sound insulation structure 119. The intake sound insulation structure 117 is provided at the intake port. The intake sound insulation structure 117 communicates with the intake port through the air flow outlet C. The exhaust sound insulation structure 119 is provided at the exhaust port. The exhaust sound insulation structure 119 communicates with the exhaust port through the air flow inlet J.

[0083] The muffler 10 may include two sound insulation structures 11, namely the intake sound insulation structure 117 and the exhaust sound insulation structure 119, which are respectively provided at and communicate with the intake port and the exhaust port of the main machine. Air flows into the main machine through the intake sound insulation structure 117, and the waste gas generated by the main machine is discharged through the exhaust sound insulation structure 119.

[0084] In this way, sound insulation structures 11 are provided at both the intake port and the exhaust port of the main machine, which can reduce noise at both the intake and exhaust ends respectively, achieving the effect of sufficient noise reduction.

[0085] Furthermore, the muffler 10 further includes a hood housing 17. The hood housing 17 covers the main machine, and the intake sound insulation structure 117 and the exhaust sound insulation structure 119 are respectively provided on both sides of the hood housing 17.

[0086] The intake sound insulation structure 117 and the exhaust sound insulation structure 119 are respectively integrated on both sides of the hood housing 17. Specifically, the structural bodies 113 of the intake sound insulation structure 117 and the exhaust sound insulation structure 119 are integrated on both sides of the hood housing 17 and serve as two side walls of the hood housing 17.

[0087] The two sound insulation structures 11, namely the intake sound insulation structure 117 and the exhaust sound insulation structure 119, are integrally integrated on one hood housing 17, which can facilitate overall disassembly and assembly and improve the assembly efficiency. In addition, the intake sound insulation structure 117 and the exhaust sound insulation structure 119, as two side walls of the hood housing 17, can cover the entire side of the oxygen generator 100, make full use of the side space of the oxygen generator 100, and extend the length of the sound insulation channel as much as possible.

[0088] Preferably, the sound insulation member 13 is also provided on the inner wall of the hood housing 17.

[0089] The hood housing 17 itself is also a sound insulation cover of the main machine. Covering the main machine, the sound insulation member 13 provided on its inner wall can absorb the noise directly leaked from the main machine, achieving the effect of reducing the operating noise of the main machine.

[0090] Furthermore, the air flow outlet C at the end of the sound insulation channel of the exhaust sound insulation structure 119 is configured as a dispersion hole group M, and the dispersion hole group M includes a plurality of breathable small holes.

[0091] The dispersion hole group M is a community of holes formed by dispersing a plurality of breathable small holes, and each breathable small hole can independently communicate the inside and outside of the sound insulation channel.

[0092] The exhaust gas discharged by the main engine passes through the silencer channel and is dispersed by the diffused hole group M before being discharged. The noise transmitted here is also diffused by the diffused hole group M before being discharged, thereby achieving a noise reduction effect.

[0093] Furthermore, the muffler 10 further includes a base 30, on which the main unit is mounted, and a hood housing 17 is mounted over the main unit and connected to the base 30. The muffler 10 further includes a fan 50, which is mounted on the top of the hood housing 17 and is used to supply air to the base 30. The base 30 is formed with an exhaust port (not shown), and a diffusion hole group M is constructed on the side of the exhaust muffler structure 119 facing the inside of the hood housing 17.

[0094] The hood housing 17 is connected to the base 30 via screws. The hood housing 17 includes an upper cover 171. A fan 50 is mounted on the upper cover 171 and supplies air into the hood housing 17 toward the base 30. The airflow passes through the hood housing 17 and is blown out of the exhaust port of the base 30. During this process, the airflow carries exhaust gas discharged from the diffused hole clusters M along with it and is blown out of the exhaust port. Simultaneously, as the airflow passes over the sidewalls where the diffused hole clusters M are formed, it creates a low pressure on the surface, helping the exhaust gas to be discharged through the diffused hole clusters M.

[0095] The muffler 10 has a housing 17 that covers the main engine. An intake muffler structure 117 and an exhaust muffler structure 119 are mounted on either side of the housing 17. The intake muffler structure 117 communicates with the main engine's air intake, while the exhaust muffler structure 119 communicates with the main engine's exhaust. The exhaust muffler structure 119 includes a diffusion hole group M that serves as an airflow outlet C. Each muffler structure 11 has a muffler channel formed by a series of multiple muffler cavities Q. The muffler channel is specifically a multi-stage muffler Q structure with progressively increasing volumes, extending back and forth in a circuitous manner. Each muffler cavity Q is provided with a muffler 13, which is respectively mounted on the structural body 113 and the cover plate 115. The mufflers 13 are spaced apart from each other on the structural body 113 and the cover plate 115.

[0096] In this way, filtered air can smoothly flow into the air intake silencer structure 117 through its air inlet J, and then into the main unit's air intake through its air outlet C. During this process, noise is gradually expanded and silenced within the silencer channel of the silencer structure 11 through multiple silencer cavities Q. Simultaneously, the noise is absorbed and silenced by the silencer element 13. Similarly, exhaust gas from the main unit's exhaust port flows into the exhaust silencer structure 119 through its air inlet J, is then diffused and discharged into the housing 17 by the diffusion holes M of the exhaust silencer structure 119, and is then blown out of the exhaust port of the base 30 under the air supply of the fan 50. Furthermore, the air intake silencer structure 117 and the exhaust silencer structure 119 cover the entire side of the oxygen concentrator 100, fully utilizing the side space of the oxygen concentrator 100 and maximizing the length of the silencer channel.

[0097] The present application also provides an oxygen generator 100, including the above muffler 10.

[0098] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0099] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A silencer, characterized in that, The silencer includes at least one sound-absorbing structure (11), and the sound-absorbing structure (11) is arranged at the air inlet and / or the air outlet of the main body of the noise reduction target; Wherein, a plurality of sound-absorbing cavities (Q) are formed in the sound-absorbing structure (11), and at least part of the sound-absorbing cavities (Q) are connected in series to form a sound-absorbing channel. The sound-absorbing structure (11) forms an air flow inlet (J) and an air flow outlet (C) that communicate with the sound-absorbing channel at both ends of the sound-absorbing channel, and the air flow inlet (J) communicates with the air outlet or the air flow outlet (C) communicates with the air inlet; The sound-absorbing channel extends reciprocally and circuitously; the sound-absorbing channel is formed by at least three of the sound-absorbing cavities (Q) connected in series. All the sound-absorbing cavities (Q) are arranged adjacent to each other in a first direction, and the longitudinal directions of all the sound-absorbing cavities (Q) are parallel to each other and perpendicular to the first direction; The sound-absorbing cavity (Q) located between two of the sound-absorbing cavities (Q) is communicated with one adjacent sound-absorbing cavity (Q) at one end in its own longitudinal direction and communicated with another adjacent sound-absorbing cavity (Q) at the other end in its own longitudinal direction; All the sound-absorbing structures (11) include an intake sound-absorbing structure (117) and an exhaust sound-absorbing structure (119). The intake sound-absorbing structure (117) is arranged at the air inlet, and the intake sound-absorbing structure (117) communicates with the air inlet through the air flow outlet (C). The exhaust sound-absorbing structure (119) is arranged at the air outlet, and the exhaust sound-absorbing structure (119) communicates with the air outlet through the air flow inlet (J); The silencer further includes a hood housing (17), the hood housing (17) covers the main body, and the intake sound-absorbing structure (117) and the exhaust sound-absorbing structure (119) are respectively arranged on both sides of the hood housing (17); The sound-absorbing structure (11) includes a structure body (113) and a cover plate (115). The cover plate (115) covers the structure body (113) and jointly encloses the plurality of sound-absorbing cavities (Q); One of the structure body (113) and the cover plate (115) is constructed with a buckle (1151), and the other is constructed with a slot (1133) that cooperates with the buckle (1151).

2. The silencer according to claim 1, characterized in that, In the series connection direction pointing to the air flow outlet (C), the volumes of all the sound-absorbing cavities (Q) forming the sound-absorbing channel gradually increase one by one.

3. The muffler according to claim 1, characterized in that, The air flow outlet (C) at the end of the sound-absorbing channel of the exhaust sound-absorbing structure (119) is constructed as a dispersion hole group (M), and the dispersion hole group (M) includes a plurality of air-permeable small holes.

4. The muffler according to claim 3, characterized in that, The silencer further includes a base (30), the main body is arranged on the base (30), the hood housing (17) covers the main body and is connected to the base (30); The silencer further includes a fan (50). The fan (50) is arranged on the top of the hood housing (17) and is used to send air to the base (30). The base (30) is formed with an air exhaust port, and the dispersion hole group (M) is constructed on the side of the exhaust sound-absorbing structure (119) facing the inside of the hood housing (17).

5. The muffler according to claim 1, characterized in that, The silencer further includes a silencing member (13), which is made of a silencing material and is disposed in each of the silencing chambers (Q).

6. The muffler according to claim 5, characterized in that, The silencing member (13) is provided on both inner walls of the structural body (113) and the cover plate (115) facing each other, and the silencing members (13) provided on the two inner walls are spaced apart from each other.

7. The muffler according to claim 1, characterized in that, The silencer further includes a sealing ring (15), and the sealing ring (15) is disposed at the connection between the structural body (113) and the cover plate (115).

8. The silencer according to claim 1, characterized in that, The silencing structure (11) is configured with a tapered pipe head (111), and the air flow inlet (J) is formed in the tapered pipe head (111).

9. An oxygen generator, characterized in that, A silencer according to any one of claims 1-8 is included.

Images