Noise reduction device and pneumatic system

Abstract

A noise reduction device and a pneumatic system, wherein the noise reduction device is arranged in a pneumatic component (2), the pneumatic component (2) is configured as an air bladder (21) capable of realizing pneumatic adjustment of a seat, a first tube (3) is inserted into the air bladder (21), and air is blown into or discharged from the air bladder (21) via the first tube (3). At least one group of noise reduction devices are arranged in the air bladder (21), each noise reduction device is configured as a fluid distributor (4), and the fluid distributor (4) is arranged at an air vent in an end portion of the first tube (3) and is communicated with the first tube. When the air bladder (21) is inflated, air is blown to the fluid distributors (4) via the first tube (3), and upon passing through the fluid distributors (4), the air is distributed and blown into the air bladder (21). Thus, the air explosion noise generated when air is blown into the air bladder (21) is reduced, achieving noise reduction.

Description

Noise reduction device and pneumatic system

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application No. 2024214205792, filed on June 20, 2024, and entitled "A noise reduction device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the field of pneumatic noise reduction, in particular to a noise reduction device and a pneumatic system. BACKGROUND

[0004] With the development of technology in the field of vehicle transportation, people's requirements for vehicle riding comfort are becoming higher and higher, and the waist and back adjustment and massage device of the seat has emerged as the times require, effectively solving the problem of human waist and back fatigue caused by long-time driving.

[0005] At present, most of the seat waist and back adjustment and massage devices of some vehicles on the market are pneumatic structures. The pneumatic structure uses an air pump as a power source to blow air into a supporting air bag body placed behind the backrest foam pad through a related control valve body. By inflating and deflating the supporting air bag body, the local convexity or flatness of the backrest seat surface is realized, thereby realizing the supporting and massaging effect on the human waist and back.

[0006] However, when air is blown into or discharged from the supporting air bag body, the rapidly flowing air will produce impact and noise, especially when air is blown into the supporting air bag body, the ejected air will produce a large amount of airflow noise. These impacts and noises will affect the comfort of people when adjusting and massaging the waist and back.

[0007] SUMMARY

[0008] In order to solve the above-mentioned part or all of the technical problems, the present application provides a noise reduction device and a pneumatic system.

[0009] In a first aspect, the present application provides a noise reduction device. The noise reduction device is arranged in a gas using assembly, the gas using assembly is configured as a gas bag capable of realizing pneumatic adjustment of a seat, a first pipeline is inserted in the gas bag, and air is blown into or discharged from the gas bag through the first pipeline. At least one set of the noise reduction device is arranged in the gas bag, the noise reduction device is configured as a fluid disperser, the fluid disperser is arranged at an air outlet of an end portion of the first pipeline and communicates with the first pipeline. In the case of inflating the gas bag, air is blown to the fluid disperser through the first pipeline, and after the action of the fluid disperser, the air is dispersed and blown out into the gas bag, thereby weakening the air blast sound generated when the air is blown into the gas bag, so as to realize noise reduction.

[0010] Optionally, the fluid disperser has a porous structure, which is a granular aggregate formed by densely porous polymerization. When the airbag is inflated, air is blown to the fluid disperser through the first pipeline, and when passing through the porous structure, the air sprayed out quickly is preferentially dispersed from the end of the porous structure. At this time, the sound wave energy is partially weakened, and the air hindered by the end of the porous structure is dispersed from the periphery of the porous structure. Finally, the air blast sound generated when the air is blown into the airbag is weakened to achieve noise reduction.

[0011] Optionally, the fluid disperser is configured as a tubular fluid disperser, which includes a noise reduction pipeline arranged at the air inlet at the front end of the first pipeline and in communication with the first pipeline. A plurality of air permeable holes are arranged on the noise reduction pipeline. When the airbag is inflated, air is blown to the noise reduction pipeline through the first pipeline, and is dispersed and blown out from the plurality of air permeable holes on the noise reduction pipeline. Thus, the air blast sound generated when the air is blown into the airbag is weakened to achieve noise reduction.

[0012] Optionally, the fluid disperser is configured as an airbag type fluid disperser, which includes a noise reduction airbag with air permeability. The noise reduction airbag is arranged at the air inlet at the front end of the first pipeline. At least one set of first flexible support bodies with air permeability is arranged in the noise reduction airbag. When the airbag is inflated, air is blown to the noise reduction airbag through the first pipeline, and is dispersed and blown out from the outer wall of the noise reduction airbag. Thus, the air blast sound generated when the air is blown into the airbag is weakened to achieve noise reduction. When the airbag is deflated, the first flexible support body supports the noise reduction airbag to form an air flow channel, and air can smoothly flow out of the noise reduction airbag through the air flow channel and finally out of the airbag.

[0013] Optionally, the first pipeline extends into the first flexible support body. The first flexible support body includes a first support part and a second support part. The first pipeline extends between the first support part and the second support part and is clamped by the first support part and the second support part.

[0014] Optionally, the noise reduction airbag is made of TPU material, and a plurality of holes are arranged on the noise reduction airbag.

[0015] Optionally, a plurality of the holes are arranged at the front end position of the noise reduction airbag away from the first pipeline.

[0016] Optionally, the fluid disperser is configured as a finger sleeve fluid disperser, the finger sleeve fluid disperser comprising a noise reduction finger sleeve arranged at a vent of a front end of the first pipeline, a plurality of air vents being formed on the noise reduction finger sleeve, and at least one set of second flexible supporting bodies with air permeability being arranged in the noise reduction finger sleeve; in the case of inflating the air bag, air is blown to the noise reduction finger sleeve through the first pipeline, and is dispersed and blown out from the plurality of air vents on the noise reduction finger sleeve, thereby weakening the air blast sound generated when air is blown into the air bag, so as to achieve noise reduction; in the case of deflating the air bag, the second flexible supporting bodies support the noise reduction finger sleeve to form an air flow channel, air can smoothly flow out of the noise reduction finger sleeve through the air flow channel, and finally out of the air bag.

[0017] Optionally, the noise reduction pipeline can be configured to be formed by extension via the first pipeline.

[0018] Optionally, the noise reduction pipeline is arranged in plug-in connection with the first pipeline.

[0019] Optionally, an end of the fluid disperser has a communication part configured to communicate with a plug-in pipe arranged at the end of the fluid disperser, one end of the plug-in pipe away from the communication part being inserted into the first pipeline.

[0020] Optionally, a quick plug is mounted at an end of the fluid disperser, and the first pipeline is inserted into the fluid disperser through the quick plug.

[0021] Optionally, the noise reduction pipeline can be configured such that an inner diameter of the noise reduction pipeline is greater than an inner diameter of the first pipeline.

[0022] Optionally, the fluid disperser is further covered with a protective layer made of air-permeable material.

[0023] Optionally, the fluid disperser can be made of metal material, including but not limited to copper, aluminum or stainless steel; or can be made of non-metal material, including but not limited to plastic or ceramic.

[0024] In a second aspect, the embodiments of the present application provide a pneumatic system, comprising a gas supply assembly and the noise reduction device according to any one of the embodiments described above, the gas supply assembly being configured to deliver flowing gas to the gas use assembly.

[0025] Compared with the prior art, the embodiments of the present application have the following beneficial effects, for example:

[0026] In the noise reduction device of the first aspect of the present application, in the case of inflating the air bag, air is blown to the fluid disperser through the first pipeline, and after the action of the fluid disperser, the air is dispersed and blown out to the air bag, thereby weakening the air blast sound generated when the air is blown into the air bag, to achieve noise reduction, and further to bring better massage comfort to the passenger.

[0027] In addition, the noise reduction device of the present application also has the advantages of simple structure, easy assembly, safe and reliable use, and is convenient for implementation and popularization and application. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0029] Fig. 1 is a structural schematic diagram of a fluid disperser with a porous structure;

[0030] Fig. 2 is a schematic diagram showing the state of the fluid disperser with a porous structure placed in an air bag;

[0031] Fig. 3 is a schematic diagram showing the state of the air bag inflated by the porous structure in Fig. 1;

[0032] Fig. 4 is a schematic diagram showing the state of the air being discharged from the air bag through the porous structure in Fig. 1 when deflated;

[0033] Fig. 5 is a structural schematic diagram of a granular polymer;

[0034] Fig. 6 is a schematic diagram showing the state of the granular polymer in Fig. 5 placed in an air bag;

[0035] Fig. 7 is a schematic diagram showing the state of the air bag inflated by the granular polymer in Fig. 5;

[0036] Fig. 8 is a schematic diagram showing the state of the air being discharged from the air bag through the granular polymer in Fig. 5 when deflated;

[0037] Fig. 9 is a structural schematic diagram showing another form of the granular polymer in Fig. 5;

[0038] Fig. 10 is a schematic diagram showing the state of the granular polymer in Fig. 9 placed in an air bag;

[0039] Fig. 11 is a schematic diagram showing the state of the air bag inflated by the granular polymer in Fig. 9;

[0040] Fig. 12 is a schematic diagram showing the state of the air being discharged from the air bag through the granular polymer in Fig. 9 when deflated;

[0041] Fig. 13 is a schematic diagram of the structure of a granular polymer;

[0042] Fig. 14 is a schematic diagram showing the state of the granular polymer in a gas bag;

[0043] Fig. 15 is a schematic diagram showing the state of the gas bag being inflated by the granular polymer;

[0044] Fig. 16 is a schematic diagram showing the state of the air being discharged from the gas bag by the granular polymer when the gas bag is deflated;

[0045] Fig. 17 is a schematic diagram showing the structure of a tubular fluid disperser;

[0046] Fig. 18 is a schematic diagram showing the state of the tubular fluid disperser in a gas bag;

[0047] Fig. 19 is a schematic diagram showing the state of the gas bag being inflated by the tubular fluid disperser;

[0048] Fig. 20 is a schematic diagram showing the state of the air being discharged from the gas bag by the tubular fluid disperser when the gas bag is deflated;

[0049] Fig. 21 is a schematic diagram showing the structure of a wide-bore noise reduction pipe;

[0050] Fig. 22 is a schematic diagram showing the state of a first pipe being extended in a gas bag;

[0051] Fig. 23 is a schematic diagram showing the structure of a branched first pipe connecting a plurality of fluid dispersers;

[0052] Fig. 24 is a schematic diagram showing the structure of a fluid disperser cover provided with a protective layer;

[0053] Fig. 25 is a schematic diagram showing the structure of a gas bag-type fluid disperser;

[0054] Fig. 26 is a schematic diagram showing the state of the gas bag being inflated by the gas bag-type fluid disperser;

[0055] Fig. 27 is a schematic diagram showing the state of the air being discharged from the gas bag by the gas bag-type fluid disperser when the gas bag is deflated;

[0056] Fig. 28 is a schematic diagram showing the structure of a first flexible support;

[0057] Fig. 29 is a schematic diagram showing the structure of a finger cot-type fluid disperser;

[0058] Fig. 30 is a schematic diagram showing the state of the gas bag being inflated by the finger cot-type fluid disperser;

[0059] Fig. 31 is a schematic diagram showing the state of the air being discharged from the gas bag by the finger cot-type fluid disperser when the gas bag is deflated;

[0060] Fig. 32 is an installation schematic diagram showing the installation of the noise reduction device in the air using assembly;

[0061] Fig. 33 is an enlarged schematic diagram of Fig. 32.

[0062] Reference sign explanation: 1, pneumatic system; 2, air using assembly; 21, air bag; 3, first pipeline; 4, fluid disperser; 41, porous structure; 411, granular polymer; 42, protective layer; 43, communication part; 5, air tube type fluid disperser; 51, noise reduction pipeline; 52, air hole; 6, air bag type fluid disperser; 61, first flexible support; 611, first support part; 612, second support part; 62, hole; 63, noise reduction air bag; 7, finger sleeve type fluid disperser; 71, noise reduction finger sleeve; 72, air vent; 73, second flexible support; 8, air supply assembly; 9, control assembly; 10, second pipeline. DETAILED DESCRIPTION

[0063] The present application is further described in detail below with reference to Figs. 1-33.

[0064] As mentioned in the background, in order to solve the problems in the prior art, the present application provides a noise reduction device, which is arranged in the air using assembly 2 of the pneumatic system 1;

[0065] The air using assembly 2 is configured as an air bag 21 capable of realizing pneumatic adjustment of a seat, a first pipeline 3 is inserted into the air bag 21, air is blown into or discharged from the air bag 21 through the first pipeline 3, and the first pipeline 3 is provided with at least one group;

[0066] At least one group of noise reduction devices is arranged in the air bag 21, the noise reduction device is configured as a fluid disperser 4, and the fluid disperser 4 is arranged at an air hole at an end of the first pipeline 3 and communicates with the first pipeline 3;

[0067] The noise reduction device and the first pipeline 3 can have a one-to-one correspondence, that is, one group of the first pipeline 3 corresponds to one group of the noise reduction device; the first pipeline 3 can be provided with a branch pipeline at the front end, and the branch pipeline is provided with a noise reduction device at the front end; or the first pipeline 3 can be provided with an air flow communication member at the air hole at the front end, and the noise reduction device is arranged at the end of the air flow communication member.

[0068] In the case of inflating the air bag 21, air is blown to the fluid disperser 4 through the first pipeline 3, and after the action of the fluid disperser 4, the air is dispersed and blown out into the air bag 21, thereby weakening the air blast sound generated when the air is blown into the air bag 21, so as to achieve noise reduction, and further to bring better massage comfort to the passenger; in the case of deflating the air bag 21, air is blown to the first pipeline 3 through the fluid disperser 4, and finally the air bag 21 is discharged from the first pipeline 3.

[0069] Optionally, the fluid disperser 4 has a porous structure 41, which is a granular aggregate 411 aggregated by densely distributed pores. The granular aggregate 411 can be made by sintering or lost wax method, and the granular aggregate 411 can be further provided with a protective layer 42 made of air-permeable material. Optionally, the protective layer 42 can be a protective air bag. In addition, the protective layer 42 can also be designed as a protective cover, but is not limited thereto. Each hole of the porous structure 41 is in a honeycomb shape, and of course, the holes of the porous structure 41 can also be designed in other shapes, such as circular holes, square holes, triangular holes, etc., which are not limited herein. The shape of each hole can be the same or different, which is not limited herein. A plurality of holes can be closely arranged or arranged at a certain distance, which is determined according to the actual noise reduction requirement, which is not limited herein.

[0070] In the case of inflating the air bag 21, air is blown to the fluid disperser 4 through the first pipeline 3, and after the action of the fluid disperser 4, the air is dispersed and blown out into the air bag 21, thereby weakening the air blast sound generated when the air is blown into the air bag 21, so as to achieve noise reduction, and further to bring better massage comfort to the passenger; in the case of deflating the air bag 21, air is blown to the first pipeline 3 through the fluid disperser 4, and finally the air bag 21 is discharged from the first pipeline 3.

[0071] Optionally, the granular aggregate 411 can be made of metal materials, including but not limited to copper, aluminum or stainless steel, etc. Optionally, the granular aggregate 411 is designed as a frustum, and the end with larger cross-sectional area of the granular aggregate 411 is in communication with and fixed to the first pipeline 3. Of course, the granular aggregate can also be designed in other shapes such as a cylinder, which is not limited herein.

[0072] Optionally, the granular polymer 411 is provided with a communication part 43 at the end thereof, and the first pipeline 3 is fixedly connected with the granular polymer 411 through the communication part 43. The communication part 43 can be a plug-in pipe arranged at the end of the granular polymer 411, and the plug-in pipe is inserted into the first pipeline 3 away from the granular polymer 411. The connection between the plug-in pipe and the first pipeline 3 can be a clamping connection or a threaded connection, but is not limited thereto. Of course, the communication part 43 can also be designed in other forms, and the communication part 43 can be detachably connected with the first pipeline 3 through plug-in, clamping, threaded connection, etc. The communication part 43 can also be fixedly connected with the first pipeline 3 through welding, etc., which is not limited herein.

[0073] Optionally, the granular polymer 411 is provided with a quick plug-in connector at the end thereof, and the first pipeline 3 is inserted into the granular polymer 411 through the quick plug-in connector. The quick plug-in connector is a conventional connector in the art, which is not described herein again. In use, it can be selected according to actual needs.

[0074] Optionally, the granular polymer 411 can also be made of non-metallic materials, including but not limited to plastics or ceramics, etc. The connection between the granular polymer 411 and the first pipeline 3 can refer to the above description, which is not described herein again.

[0075] Optionally, the fluid disperser 4 is a tracheal fluid disperser 5, which includes a noise reduction pipeline 51 arranged at the air inlet of the front end of the first pipeline 3 and in communication with the first pipeline 3. A plurality of air holes 52 are formed in the noise reduction pipeline 51. The plurality of air holes 52 can disperse the concentrated airflow into a plurality of small airflows, reduce the risk of high-speed airflow directly impacting the inside of the air bag, and reduce local turbulence and noise. The dispersed airflow is more likely to maintain a laminar flow state, thereby reducing vortex and turbulent noise. The plurality of air holes 52 can also serve as a micro-silencing structure, which consumes sound energy through reflection, interference and friction loss of sound waves at the edges of the air holes 52. The sizes of the plurality of air holes 52 can be the same, different or partially different, which is not limited herein. The air holes 52 of different sizes can absorb noise of different frequencies, thereby improving the broadband noise reduction effect. The noise reduction pipeline 51 and the first pipeline 3 are fixedly connected through a quick plug-in connector, which is a conventional connector in the art, which is not described herein again. In use, it can be selected according to actual needs.

[0076] Optionally, the noise reduction pipeline 51 can be extended through the first pipeline 3, that is, the noise reduction pipeline 51 is regarded as a part of the structure of the first pipeline 3.

[0077] Optionally, the noise reduction pipeline 51 can be configured such that the inner diameter of the noise reduction pipeline 51 is greater than the inner diameter of the first pipeline 3, and the specific size difference therebetween can be designed according to actual needs.

[0078] In the case of inflating the air bag 21, air is blown to the noise reduction pipeline 51 through the first pipeline 3, and is blown out to the surrounding from the plurality of air-permeable holes 52 on the noise reduction pipeline 51, thereby weakening the air blast sound generated when air is blown into the air bag 21, so as to achieve noise reduction.

[0079] Optionally, in order to improve the noise reduction effect and make the air flow entering the air using assembly 2 more dispersed and more uniform, the first pipeline 3 in the embodiment can be connected with one or more noise reduction pipelines 51. In the embodiment, the first pipeline 3 is connected with two noise reduction pipelines 51, and of course, the first pipeline 3 can also be connected with three, four, five or more noise reduction pipelines 51, which is not limited herein.

[0080] Optionally, the fluid disperser 4 is configured as an air bag type fluid disperser 6, which includes a noise reduction air bag 63 having air permeability, which is arranged at the air inlet of the front end of the first pipeline 3. In order to further improve the noise reduction effect of the noise reduction air bag 63, at least one set of first flexible support bodies 61 having air permeability is arranged in the noise reduction air bag 63 in the embodiment, which can be selected as sponge balls or sponge blocks, but is not limited thereto.

[0081] In the case of inflating the air bag 21, air is blown to the noise reduction air bag 63 through the first pipeline 3, and is blown out to the surrounding from the outer wall of the noise reduction air bag 63, thereby weakening the air blast sound generated when air is blown into the air bag 21, so as to achieve noise reduction.

[0082] In the case of deflating the air bag 21, the first flexible support bodies 61 support the noise reduction air bag 63 to form an air flow channel, and air can smoothly flow out of the noise reduction air bag 63 through the air flow channel, and finally out of the air bag 21.

[0083] Optionally, the noise reduction air bag 63 can be made of non-woven fabric or TPU material (thermoplastic polyurethane). When the noise reduction air bag 63 is made of TPU material, a plurality of holes 62 are formed on the noise reduction air bag 63 to maintain the air permeability of the noise reduction air bag 63, and the plurality of holes 62 are concentrated on the front end of the noise reduction air bag 63 away from the first pipeline 3. The holes 62 can reduce the air flow speed through the throttling effect, avoid the pressure pulsation caused by the instantaneous inflow of high-pressure air flow, and thus reduce structural vibration and noise. Of course, the holes 62 can also be formed on other positions of the noise reduction air bag, which are not limited herein. The noise reduction air bag can also be made of other materials, which are not limited herein.

[0084] Optionally, the first pipeline 3 extends into the first flexible support 61, and the first flexible support 61 includes a first support portion 611 and a second support portion 612. The first support portion 611 and the second support portion 612 can be sponge blocks, but are not limited thereto. The first pipeline 3 extends between the first support portion 611 and the second support portion 612 and is clamped by the first support portion 611 and the second support portion 612.

[0085] The fluid dispenser 4 is configured as a finger sleeve fluid dispenser 7, which includes a noise reduction finger sleeve 71. The noise reduction finger sleeve 71 can be a plastic sleeve formed by one-step molding. The noise reduction finger sleeve 71 is arranged at the air vent of the front end of the first pipeline 3. A plurality of ventilation holes 72 are formed on the noise reduction finger sleeve 71. At least one set of second flexible supports 73 with air permeability is arranged in the noise reduction finger sleeve 71. The second flexible supports 73 can be sponge balls or sponge blocks, but are not limited thereto.

[0086] When the air bag 21 is inflated, air is blown to the noise reduction finger sleeve 71 through the first pipeline 3 and is dispersed and blown out from the plurality of ventilation holes 72 on the noise reduction finger sleeve 71, thereby weakening the air blast sound generated when air is blown into the air bag 21 to achieve noise reduction.

[0087] When the air bag 21 is deflated, the second flexible supports 73 support the noise reduction finger sleeve 71 to form an air flow channel. Air can smoothly flow out of the noise reduction finger sleeve 71 through the air flow channel and finally out of the air bag 21.

[0088] In conclusion, the noise reduction device of the embodiment of the application, when the air bag 21 is inflated, air is blown to the fluid disperser 4 through the first pipeline 3, and after the action of the fluid disperser 4, the air is dispersed and blown into the air bag 21, thereby weakening the air blast sound generated when the air is blown into the air bag 21, to achieve noise reduction, and further to bring better massage comfort to the passenger.

[0089] In addition, the embodiment of the application also provides a pneumatic system 1, which comprises the above-mentioned noise reduction device, and the noise reduction device can be arranged in a pneumatic system such as a waist support, a leg support, back massage, shoulder massage, but is not limited thereto, and the pneumatic system 1 comprises:

[0090] a gas using assembly 2, which is configured to realize pneumatic adjustment of a seat;

[0091] a gas supply assembly 8, which is configured to deliver flowing gas into the gas using assembly 2;

[0092] a control assembly 9, which is configured to control the flowing gas to enter or discharge from the gas using assembly 2;

[0093] at least one first pipeline 3, which is arranged between the control assembly 9 and the gas using assembly 2, and the noise reduction device is arranged at an end of the first pipeline 3 away from the control assembly 9;

[0094] at least one second pipeline 10, which is arranged between the gas supply assembly 8 and the control assembly 9.

[0095] In the case of inflating the gas using assembly 2, the gas supply assembly 8 provides the flowing air, the flowing air is conducted to the control assembly 9 through the second pipeline 10, and the control assembly 9 conducts the flowing gas into the gas using assembly 2 through the first pipeline 3; in the case of needing to discharge the gas using assembly 2, the flowing gas is conducted into the control assembly 9 through the first pipeline 3, and the control assembly 9 discharges the flowing gas through the second pipeline 10.

[0096] In the description of the application, it should be understood that the orientations or positional relationships indicated by the terms “vertical”, “horizontal” and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0097] In addition, the terms "first", "second", etc. are only used for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0098] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0099] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims. Industrial applicability

[0100] In summary, the embodiment of the present application provides a noise reduction device which can weaken the air blast sound generated when air is blown into the air bag to achieve noise reduction, thereby bringing better massage comfort to the occupant. Moreover, the structure is simple, easy to assemble, safe and reliable to use.

Claims

1. A noise reduction device, characterized in that, the noise reduction device is arranged in a gas using assembly (2), the gas using assembly (2) is configured to have a gas bag (21) capable of realizing seat pneumatic adjustment, a first pipeline (3) is arranged in the gas bag (21), and air is blown into or discharged from the gas bag (21) through the first pipeline (3); at least one set of the noise reduction device is arranged in the gas bag (21), and the noise reduction device is configured as a fluid disperser (4) arranged at a vent of an end of the first pipeline (3) and in communication with the first pipeline (3); in the case of inflating the gas bag (21), air is blown to the fluid disperser (4) through the first pipeline (3), and after the action of the fluid disperser (4), the air is dispersed and blown out into the gas bag (21), thereby weakening the air blast sound generated when the air is blown into the gas bag (21), so as to realize noise reduction.

2. The noise reduction device according to claim 1, characterized in that: the fluid disperser (4) has a porous structure (41), and the porous structure (41) is a granular aggregate (411) aggregated by densely distributed pores, in the case of inflating the gas bag (21), air is blown to the fluid disperser (4) through the first pipeline (3), and when passing through the porous structure (41), the air sprayed quickly is preferentially dispersed and blown out from the end of the porous structure (41), at this time, the sound wave energy is partially weakened, and the air partially hindered by the end of the porous structure (41) is dispersed and blown out from the periphery of the porous structure (41), finally weakening the air blast sound generated when the air is blown into the gas bag (21), so as to realize noise reduction.

3. The noise reduction device according to claim 1, characterized in that: the fluid disperser (4) is configured as a tubular fluid disperser (5), the tubular fluid disperser (5) includes a noise reduction pipeline (51) arranged at a vent of a front end of the first pipeline (3) and in communication with the first pipeline (3), and a plurality of air permeable holes (52) are formed on the noise reduction pipeline (51); in the case of inflating the gas bag (21), air is blown to the noise reduction pipeline (51) through the first pipeline (3), and is dispersed and blown out to the surrounding from the plurality of air permeable holes (52) on the noise reduction pipeline (51), thereby weakening the air blast sound generated when the air is blown into the gas bag (21), so as to realize noise reduction.

4. The noise reduction device according to claim 1, characterized in that: the fluid disperser (4) is configured as a gas bag type fluid disperser (6), the gas bag type fluid disperser (6) includes a noise reduction gas bag (63) having air permeability, the noise reduction gas bag (63) is arranged at a vent of a front end of the first pipeline (3), and at least one set of first flexible support bodies (61) having air permeability is arranged in the noise reduction gas bag (63). In the case of inflating the air bag (21), air is blown to the noise reduction air bag (63) through the first pipeline (3), and is blown out from the outer wall of the noise reduction air bag (63) to the surroundings, thereby weakening the air blast sound generated when air is blown into the air bag (21), so as to achieve noise reduction. In the case of deflating the air bag (21), the first flexible support (61) supports the noise reduction air bag (63) to form an air flow channel, and air can smoothly flow out of the noise reduction air bag (63) through the air flow channel, and finally out of the air bag (21).

5. The noise reduction device according to claim 4, wherein: the first pipeline (3) extends into the first flexible support (61), the first flexible support (61) comprises a first support part (611) and a second support part (612), and the first pipeline (3) extends between the first support part (611) and the second support part (612) and is clamped by the first support part (611) and the second support part (612).

6. The noise reduction device according to claim 1, wherein: the fluid disperser (4) is configured as a finger sleeve type fluid disperser (7), the finger sleeve type fluid disperser (7) comprises a noise reduction finger sleeve (71) arranged at a vent of a front end of the first pipeline (3), a plurality of air vents (72) are formed in the noise reduction finger sleeve (71), and at least one set of second flexible supports (73) with air permeability are arranged in the noise reduction finger sleeve (71); in the case of inflating the air bag (21), air is blown to the noise reduction finger sleeve (71) through the first pipeline (3), and is blown out from the plurality of air vents (72) on the noise reduction finger sleeve (71) to the surroundings, thereby weakening the air blast sound generated when air is blown into the air bag (21), so as to achieve noise reduction; in the case of deflating the air bag (21), the second flexible support (73) supports the noise reduction finger sleeve (71) to form an air flow channel, and air can smoothly flow out of the noise reduction finger sleeve (71) through the air flow channel, and finally out of the air bag (21).

7. The noise reduction device according to claim 3, wherein: the noise reduction pipeline (51) can be configured to be extended via the first pipeline (3).

8. The noise reduction device according to claim 3, wherein: the noise reduction pipeline (51) is inserted with the first pipeline (3).

9. The noise reduction device according to claim 3, wherein: the noise reduction pipeline (51) can be configured such that an inner diameter of the noise reduction pipeline (51) is greater than an inner diameter of the first pipeline (3).

10. The noise reduction device according to any one of claims 2-9, wherein: a protective layer (42) made of air permeable material is further arranged outside the fluid disperser (4).

11. The noise reduction device according to claim 2, wherein: ​ ​ ​ ​ ​ ​ The fluid disperser (4) can be made of a metallic material, including but not limited to copper, aluminum or stainless steel; or a non-metallic material, including but not limited to plastic or ceramic.

12. A pneumatic system, characterized by The noise reduction device of any one of claims 1-11, comprising a gas supply assembly (8) configured to deliver a flowing gas into the gas user assembly (2).

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