Noise reduction structure for air bladder body and pneumatic system

Abstract

The present application relates to a noise reduction structure for an air bladder body and a pneumatic system. The noise reduction structure is disposed in the air bladder body. The air bladder body is configured as an air pouch capable of implementing pneumatic adjustment of a seat. An airflow conduit is inserted into the air pouch, and an airflow is blown into the air pouch via an air supply assembly and the airflow conduit. The noise reduction structure is configured as a variable airflow dispersion portion, and the variable airflow dispersion portion is in communication with the end of the airflow conduit away from the air supply assembly. During inflation of the air pouch, a high-speed jetted airflow is blown toward the variable airflow dispersion portion via the air supply assembly and the airflow conduit; the variable airflow dispersion portion gradually assumes an expanded state under the dispersing action of the airflow, and the airflow is dispersed and blown into the air pouch. During outward deflation of the air pouch, the variable airflow dispersion portion gradually assumes or has already assumed a collapsed state, and the airflow in the air pouch enters the airflow conduit relatively slowly and is ultimately discharged from the air pouch.

Description

A noise reduction structure and pneumatic system for an airbag

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411416384.5, filed on October 11, 2024, entitled "A Noise Reduction Structure and Pneumatic System for an Airbag".

[0003] Priority to Chinese Patent Application No. 202422458008.4, filed with the Chinese Patent Office on October 11, 2024, entitled "A Seat Pneumatic System with Noise Reduction Structure", the entire contents of which are incorporated herein by reference. Technical Field

[0004] This application relates to the field of pneumatic noise reduction technology, and in particular to a noise reduction structure and pneumatic system for an airbag. Background Technology

[0005] With the continuous development of technology in the field of vehicle transportation, people have higher and higher requirements for vehicle riding comfort. As a result, seat massage devices have emerged, effectively solving the problem of fatigue during long-term driving.

[0006] Most of the massage devices that come with vehicles on the market today use a pneumatic structure. The pneumatic structure uses an air pump as a power source to blow air through a control valve into the support airbag located at the back of the foam pad. By inflating and deflating the support airbag, the seat surface can be partially raised or flattened, thereby achieving a support and massage effect on the human body.

[0007] However, when air is blown into the top support airbag, the rapidly ejected air will produce a loud airflow sound, and these impacts and noises will affect the comfort of the massage.

[0008] Application content

[0009] To address some or all of the aforementioned technical problems, embodiments of this application provide a noise reduction structure and pneumatic system for an airbag.

[0010] In a first aspect, embodiments of this application provide a noise reduction structure for an airbag, wherein the noise reduction structure is disposed within the airbag, and the airbag is configured as an air bag capable of achieving pneumatic adjustment of the seat; an air passage is inserted into the air bag, and air is blown into the air bag via the air supply component and the air passage; the noise reduction structure is configured as a variable airflow dispersion section, which is connected to the end of the air passage away from the air supply component; when the air bag is inflated, high-speed ejected air is blown towards the variable airflow dispersion section via the air supply component and the air passage, and the variable airflow dispersion section gradually expands under the airflow dispersion effect, and the airflow is dispersed and blown into the air bag; when the air bag is deflating, the variable airflow dispersion section gradually becomes or has already become contracted, and the airflow in the air bag will relatively slowly enter the air passage and eventually be discharged from the air bag.

[0011] Optionally, the variable airflow dispersion section is configured as a tubular fluid disperser, which includes N tubular flaps (N≥2) arranged around the port of the ventilation pipe. The N tubular flaps are allowed to move relative to the ventilation pipe in a manner that allows them to converge or disperse. Regardless of whether the air bag is in an inflated or deflated state, the tubular fluid disperser remains in communication with the ventilation pipe. When the air bag is inflated, airflow is blown through the ventilation pipe toward the tubular fluid disperser, and the N tubular flaps disperse and open under the action of the airflow, allowing the airflow to be dispersed and blown into the air bag. When the air bag is deflating, the N tubular flaps retract, the airflow velocity decreases, and the airflow enters the ventilation pipe relatively slowly, eventually exiting the air bag.

[0012] Optionally, the N tracheal valves are configured as multi-valve tracheal bodies formed by cutting along the diameter of the ventilation tubing, i.e., the N tracheal valves and the ventilation tubing are considered as an integrally formed structure.

[0013] Optionally, the N tracheal valves are configured such that each tracheal valve is movably connected to the ventilation circuit, that is, the N tracheal valves and the ventilation circuit are considered to be a detachable connection structure.

[0014] Optionally, the length of the N tracheal valves is configured such that its length is greater than 1.5 times the outer diameter of the ventilation tubing.

[0015] Optionally, the lengths of the N tracheal valves can be configured to be all equal, or they can be configured to be non-all equal.

[0016] Optionally, the N tracheal valves are further provided with a number of ventilation holes configured to expand the airflow range.

[0017] Optionally, the shape of the N tracheal valves (13) is configured such that the cross-sectional area of ​​the N tracheal valves (13) remains consistent from the direction close to the ventilation line (3) to the direction away from the ventilation line (3).

[0018] Optionally, the shape of the N tracheal valves (13) is configured such that the cross-sectional area of ​​the N tracheal valves (13) gradually decreases from the direction close to the ventilation line (3) to the direction away from the ventilation line (3).

[0019] Optionally, a pipe silencer can be added to the ventilation pipe. The pipe silencer is located between the air supply component and the noise reduction structure. The pipe silencer is a porous structure composed of densely packed pores. When the air bag is inflated, the airflow first blows towards the pipe silencer through the ventilation pipe and preferentially disperses from the end of the pipe silencer. At this time, the airflow velocity is partially weakened, and some of the airflow obstructed by the porous structure will disperse from the outer periphery of the porous structure, further weakening the airflow velocity, thereby reducing the air burst noise generated when the airflow is ejected, and achieving primary noise reduction.

[0020] Optionally, the pipeline silencer is made of a metallic material, including but not limited to copper, aluminum, or stainless steel; or, the pipeline silencer is made of a non-metallic material, including but not limited to plastic or ceramic.

[0021] This application provides a pneumatic system including the noise reduction structure described in the first aspect above. The pneumatic system includes:

[0022] An airbag body configured to enable pneumatic adjustment of the seat;

[0023] An air supply assembly configured to deliver flowing gas into the airbag;

[0024] A control component configured to control the flow of gas into or out of the airbag;

[0025] A ventilation pipe is placed between the air supply component and the airbag body, and the noise reduction structure is located at the end of the ventilation pipe away from the air supply component.

[0026] Thirdly, embodiments of this application provide a seat pneumatic system with a noise reduction structure, including:

[0027] The air supply assembly is configured as an air bag capable of massaging or supporting the occupant's body.

[0028] A gas supply assembly configured to deliver flowing gas into the gas bag;

[0029] A control component configured to control the flow of gas into or out of the gas bag;

[0030] At least one first conduit is connected between the gas supply component and the control component;

[0031] At least one second conduit is provided between the control component and the air bag, and one end of the second conduit away from the control component extends into the air bag;

[0032] A noise reduction structure is disposed in the air bag, specifically installed at the end of the second pipeline away from the control component, and the noise reduction structure is configured as a variable airflow dispersion section;

[0033] When the air bag is inflated, the high-speed jet of air is delivered to the control component through the first pipeline. After being adjusted by the control component, the air is blown to the variable airflow dispersion section through the second pipeline. The variable airflow dispersion section gradually expands under the action of airflow dispersion, and the airflow is dispersed and blown into the air bag.

[0034] When the air bag is venting air, the variable airflow dispersion section gradually becomes or has already become converging. The airflow in the air bag will enter the second pipeline relatively slowly through the variable airflow dispersion section, be transported back to the control component through the second pipeline, and finally be discharged from the air bag after being adjusted by the control component.

[0035] Compared with existing technologies, the beneficial effects of the embodiments of this application include, for example:

[0036] As can be seen from the above technical solutions, in the noise reduction structure described in the first aspect of this application and the pneumatic system described in the second and third aspects, when the air bag is inflated, the high-speed ejected air is blown towards the variable airflow dispersion part through the air supply component and the ventilation pipe. Under the effect of airflow dispersion, the variable airflow dispersion part gradually becomes an expanded state, and the airflow is dispersed and blown into the air bag, reducing the airflow velocity. This reduces the air pop noise generated when the airflow blows into the air bag, achieving noise reduction and thus providing the occupant with a better massage comfort. When the air bag is expelling air, the variable airflow dispersion part gradually becomes or has already become a contracted state, reducing the airflow velocity. The airflow in the air bag will enter the ventilation pipe relatively slowly and eventually be discharged from the air bag.

[0037] In addition, the noise reduction structure of this application has the advantages of simple structure, easy assembly, and safe and reliable use, which facilitates implementation and promotion. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0039] Figure 1 is a schematic diagram showing the structure of a tubular fluid disperser (4 tubular flaps);

[0040] Figure 2 is a schematic diagram showing the state time shift of the noise reduction structure in Figure 1 from the contracted state to the expanded state and back to the contracted state.

[0041] Figure 3 is a schematic diagram showing the initial state of the noise reduction structure and air bag in Figure 1;

[0042] Figure 4 is a schematic diagram showing the state of the noise reduction structure and air bag in Figure 1 when in the expanded state;

[0043] Figure 5 is a schematic diagram showing the state of the noise reduction structure and air bag in Figure 1 when the air bag is near full.

[0044] Figure 6 is a schematic diagram showing the state of the noise reduction structure and air bag in Figure 1 when fully filled;

[0045] Figure 7 is a schematic diagram showing the state of the noise reduction structure and air bag in Figure 1 when the pressure is maintained;

[0046] Figure 8 is a schematic diagram showing the state of the noise reduction structure and air bag in Figure 1 when the air is deflated;

[0047] Figure 9 is a schematic diagram showing the state of the noise reduction structure and the air bag in Figure 1 when the gas in the air bag is about to be emptied;

[0048] Figure 10 is a schematic diagram showing the structure of a tracheal fluid disperser (6 tracheal flaps);

[0049] Figure 11 is a schematic diagram showing the state time shift of the noise reduction structure in Figure 10 from the contracted state to the expanded state and back to the contracted state.

[0050] Figure 12 is a schematic diagram showing the state of the noise reduction structure and air bag in Figure 10 when fully filled;

[0051] Figure 13 is a schematic diagram showing the detachable connection between the ventilation duct and the noise reduction structure.

[0052] Figure 14 is a schematic diagram showing other detachable forms of the structure shown in Figure 13;

[0053] Figure 15 is a schematic diagram of the noise reduction structure in Figure 10 when the tracheal valves are of unequal length;

[0054] Figure 16 is a schematic diagram of the noise reduction structure in Figure 10 when showing different shapes of the tracheal valve;

[0055] Figure 17 is a schematic diagram showing the structure of the seat pneumatic system provided in the embodiment of this application;

[0056] Figure 18 is an enlarged schematic diagram intended to clearly show the noise reduction structure in Figure 17.

[0057] Explanation of reference numerals in the attached drawings: 1. Noise reduction structure; 11. Variable airflow dispersion section; 12. Tracheal fluid disperser; 13. Tracheal valve; 14. Multi-valve tracheal body; 18. Ventilation hole; 19. Airflow gap; 2. Airbag body; 21. Air bag; 3. Ventilation pipeline; 4. Air supply assembly; 5. Pipeline silencer; 51. Porous structure; 6. Control assembly; 7. Backrest; 8. First pipeline. Detailed Implementation

[0058] The present application will be further described in detail below with reference to Figures 1-18.

[0059] As mentioned in the background section, in view of the problems in the prior art, this application proposes a noise reduction structure for an airbag, wherein the noise reduction structure is disposed in the airbag, wherein:

[0060] The airbag 2 is configured as an air bag 21 capable of pneumatic adjustment of the seat; an air passage 3 is inserted into the air bag 21, and airflow is blown into the air bag 21 through the air supply component 4 and the air passage 3;

[0061] The noise reduction structure 1 is configured as a variable airflow dispersion section 11, which is connected to the end of the ventilation pipe 3 away from the air supply component 4.

[0062] When the air bag 21 is inflated, the high-speed airflow is blown through the air supply component 4 and the air pipe 3 to the variable airflow dispersion part 11. Under the effect of airflow dispersion, the variable airflow dispersion part 11 gradually expands and the airflow is dispersed and blown into the air bag 21. The airflow velocity is reduced, thereby reducing the air explosion sound generated when the airflow blows into the air bag 21, achieving noise reduction, and thus bringing better massage comfort to the occupants.

[0063] When the air bag 21 is venting air outward, the variable airflow dispersion section 11 gradually becomes or has already become converging, the airflow velocity decreases, the gas is slowly released, and the airflow in the air bag 21 will enter the ventilation pipe 3 relatively slowly and finally be discharged from the air bag 21.

[0064] Optionally, the noise reduction structure 1 and the ventilation pipe 3 can have a one-to-one correspondence, that is, one set of ventilation pipes 3 corresponds to one set of noise reduction structures 1; alternatively, a branch pipe can be set at the front end of the ventilation pipe 3, and the noise reduction structure 1 can be configured at the front end of the branch pipe. For the air bag 21, the ventilation pipe 3 and the noise reduction structure 1 can be set in any level of air bag 21, or the ventilation pipe 3 and the noise reduction structure 1 can be set in a specified level of air bag 21. The specific setting needs to be set according to the actual situation.

[0065] Optionally, the variable airflow dispersion section 11 is configured as a tubular fluid disperser 12, which is formed by a flexible pipeline. The tubular fluid disperser 12 includes N tubular flaps 13 (N≥2) arranged around the port of the ventilation pipeline 3. The N tubular flaps 13 form airflow gaps 19 between each other. The N tubular flaps 13 are allowed to move relative to the ventilation pipeline 3 in a manner that allows them to converge or disperse (the attached figures mainly show schematic diagrams of 4 tubular flaps 13 and 6 tubular flaps 13). The N tubular flaps 13 are completely inserted into the air bag 21 to ensure that the N tubular flaps 13 can move in the manner described above. It should also be noted that the tubular fluid disperser 12 always remains connected to the ventilation pipeline 3, whether the air bag 21 is in an inflated or deflated state.

[0066] When the air bag 21 is inflated, the airflow is blown through the ventilation pipe 3 toward the air tube fluid disperser 12. The N air tube flaps 13 are dispersed and opened under the action of the airflow, and the airflow is dispersed and blown into the air bag 21. Since the airflow range at the port is relatively larger, the airflow velocity is weakened, which ultimately reduces the air pop noise generated when the airflow blows into the air bag 21, thus achieving noise reduction.

[0067] When the air bag 21 is venting air outward, the N air valves 13 retract and shrink, the airflow velocity decreases, the gas is released slowly, and the airflow in the air bag 21 will enter the ventilation pipe 3 relatively slowly and eventually be discharged from the air bag 21.

[0068] Optionally, the N tracheal flaps 13 can be configured as multi-flap tracheal bodies 14 formed by cutting along the diameter of the ventilation pipe 3. That is, the N tracheal flaps 13 and the ventilation pipe 3 are regarded as an integral structure. The advantage of this arrangement is that no additional parts need to be added. Noise reduction can be achieved by relying solely on the improvement of the ventilation pipe 3 itself. The design concept is ingenious and the noise reduction effect is also good.

[0069] Optionally, the N tracheal flaps 13 can be configured such that each tracheal flap 13 is movably connected to the ventilation tube 3, that is, the N tracheal flaps 13 and the ventilation tube 3 are considered to be a detachable connection structure. The detachable connection method includes, but is not limited to, plugging or snapping. The advantage of this arrangement is that the noise reduction structure 1 can be regarded as a separate component and installed at the end of the ventilation tube 3 in some way, which greatly increases the flexibility of use.

[0070] Optionally, the length of the N tracheal flaps 13 can be configured such that its length is greater than 1.5 times the outer diameter of the ventilation tube 3. The advantage of this setting is that when the air bag 21 is inflated, the N tracheal flaps 13 can have a better opening angle, the airflow range is larger, and the noise reduction effect is better.

[0071] Optionally, the lengths of the N tracheal valves 13 can be configured to be all of equal length or not all of equal length, that is, the lengths of the tracheal valves 13 can be flexibly configured.

[0072] Optionally, the shape of the N tracheal valves 13 can be flexibly configured, such as rectangular, triangular or trapezoidal, but not limited to these.

[0073] Optionally, several ventilation holes 18 may be added to the N tracheal valves 13. When the air bag 21 is inflated, part of the airflow flowing through the tracheal fluid diffuser 12 can be dispersed outward along the ventilation holes 18 and blown into the air bag 21 to expand the airflow range and further reduce the air pop sound.

[0074] Optionally, the shape of the N tracheal flaps 13 is configured such that the cross-sectional area of ​​the N tracheal flaps 13 remains consistent from the direction close to the ventilation line 3 to the direction away from the ventilation line 3.

[0075] Optionally, the shape of the N tracheal valves 13 is configured such that the cross-sectional area of ​​the N tracheal valves 13 gradually decreases from the direction close to the ventilation line 3 to the direction away from the ventilation line 3.

[0076] Here, the principle of noise reduction is explained further:

[0077] Assuming the air pressure output from the air supply component 4 is P, the air pressure entering the ventilation pipe 3 is P1, and the air pressure flowing into the air bag 21 through the ventilation pipe 3 is P2, since the area of ​​the ventilation pipe 3 is smaller than the area of ​​the air bag 21, P2 is much smaller than P1. According to the Bernoulli effect, when fluid flows from a high-pressure area to a low-pressure area, the increase in flow velocity will lead to a decrease in local pressure. This pressure difference can generate airflow.

[0078] When the airflow passes through the narrow section of the ventilation pipe 3, the flow velocity increases, and the pressure recovers at the outlet or downstream area. This pressure will produce a popping sound, so the pressure difference is one of the main factors causing the popping sound. When the airflow flows into the air bag 21 through the ventilation pipe 3, under the action of the noise reduction structure 1, the ventilation range when the airflow enters the air bag 21 will be gradually expanded, so that the pressure P1 slowly becomes P2, the airflow velocity decreases, and thus the popping sound is reduced.

[0079] Optionally, a pipe silencer 5 may be added to the ventilation pipe 3. The pipe silencer 5 is a porous structure 51 formed by the aggregation of dense pores. The pipe silencer 5 may be made of metal materials, including but not limited to copper, aluminum or stainless steel; or it may be made of non-metallic materials, including but not limited to plastic or ceramic.

[0080] When the air bag 21 is inflated, the airflow first blows through the ventilation pipe 3 to the pipe silencer 5, and preferentially disperses from the end of the pipe silencer 5. At this time, the airflow velocity is partially weakened, and some of the airflow obstructed by the porous structure 51 will disperse from the outer periphery of the porous structure 51, further weakening the airflow velocity, thereby weakening the air explosion noise generated when the airflow is ejected, achieving primary noise reduction. The airflow after primary noise reduction then undergoes secondary noise reduction through the noise reduction structure 1 at the end of the ventilation pipe 3, further weakening the air explosion noise when the airflow is ejected.

[0081] This application provides a pneumatic system including the aforementioned noise reduction structure 1. The noise reduction device can be incorporated into pneumatic systems 6 such as lumbar supports, leg supports, back massagers, and shoulder massagers, but is not limited to these. The pneumatic system 6 includes:

[0082] Airbag 2, wherein the gas assembly is configured to achieve pneumatic adjustment of the seat;

[0083] Gas supply assembly 4, which is configured to supply flowing gas into the airbag body 2;

[0084] Control component 6, configured to control the flow of gas into or out of the airbag 2;

[0085] Ventilation pipe 3 is placed between the air supply component 4 and the airbag body 2, and the noise reduction structure 1 is located at the end of the ventilation pipe 3 away from the air supply component 4.

[0086] When the airbag 2 is inflated, the air supply component 4 provides the flowing gas, and the control component 6 conducts the flowing gas to the airbag 2 through the ventilation pipe 3, and reduces the air pop noise when air is blown into the airbag 2 through the noise reduction structure 1 at the end of the ventilation pipe 3, so as to achieve noise reduction.

[0087] Furthermore, this application also proposes a seat pneumatic system with a noise reduction structure, the seat pneumatic system comprising:

[0088] Air supply component 2, which is configured as an air bag 21 capable of massaging or supporting the occupant's body;

[0089] Gas supply assembly 4, which is configured to supply flowing gas into the gas bag 21;

[0090] Control component 6, which is configured to control the flow of gas into or out of the gas bag 21;

[0091] At least one first pipeline 5, which is connected between the gas supply component 4 and the control component 6;

[0092] At least one second pipe 3 is provided between the control component 6 and the air bag 21, and one end of the second pipe 3 away from the control component 6 extends into the air bag 21;

[0093] Noise reduction structure 1 is configured in the air bag 21 and is specifically installed at the end of the second pipeline 3 away from the control component 6. The noise reduction structure 1 is configured as a variable airflow dispersion section 11.

[0094] When the air bag 21 is inflated, the high-speed airflow is delivered to the control component 6 through the first pipe 5. After being adjusted by the control component 6, the airflow is blown to the variable airflow dispersion section 11 through the second pipe 3. Under the effect of airflow dispersion, the variable airflow dispersion section 11 gradually expands and the airflow is dispersed and blown into the air bag 21. The airflow velocity is reduced, thereby reducing the air explosion sound generated when the airflow blows into the air bag 21, achieving noise reduction, and thus bringing a better massage comfort to the occupants.

[0095] When the air bag 21 is venting air outward, the variable airflow dispersion section 11 gradually becomes or has already become converging. The airflow in the air bag 21 will enter the second pipeline 3 relatively slowly through the variable airflow dispersion section 11, and be transported back to the control component 6 through the second pipeline 3. After being adjusted by the control component 6, it will finally be discharged from the air bag 21.

[0096] The air-using component 2 mentioned here and there can be the airbag 2 described above, or other structures, which are not limited here. The second pipeline mentioned here and there is equivalent to the ventilation pipeline mentioned above.

[0097] Optionally, the gas supply component 4 is an air pump that supplies flowing gas into the air bag 21; the control component 6 is a controller with a valve body configured to regulate gas flow; the first pipeline 5 is connected between the air pump and the controller, and the second pipeline 3 is connected between the controller and the air bag 21. Of course, other gas supply structures can also be used for the gas supply component 4, and are not limited here.

[0098] Optionally, the noise reduction structure 1 and the second pipeline 3 can have a one-to-one correspondence, that is, one set of the second pipeline 3 corresponds to one set of the noise reduction structure 1; or the second pipeline 3 can be provided with a branch pipeline at the front end, and the noise reduction structure 1 can be configured at the front end of the branch pipeline; for the air bag 21, the second pipeline 3 and the noise reduction structure 1 can be set in any level air bag 21, or the second pipeline 3 and the noise reduction structure 1 can be set in a specified level air bag 21, and the specific setting needs to be set according to the actual situation.

[0099] Optionally, the variable airflow dispersion section 11 is configured as a tubular fluid disperser 12, which is formed by a flexible pipeline. The tubular fluid disperser 12 includes N tubular flaps 13 (N≥2) arranged around the port of the second pipeline 3. The N tubular flaps 13 form airflow gaps 19 between each other. The N tubular flaps 13 are allowed to move relative to the second pipeline 3 in a manner that allows them to converge or disperse (the attached figures mainly show schematic diagrams of 4 tubular flaps 13 and 6 tubular flaps 13). The N tubular flaps 13 are completely inserted into the air bag 21 to ensure that the N tubular flaps 13 can move in the manner described above. It should also be noted that the tubular fluid disperser 12 always remains in communication with the second pipeline 3, regardless of whether the air bag 21 is in an inflated or deflated state.

[0100] When the air bag 21 is inflated, the airflow regulated by the control component 6 is blown to the air tube fluid disperser 12 through the second pipe 3. The N air tube flaps 13 are dispersed and opened under the action of the airflow, and the airflow is dispersed and blown into the air bag 21. Since the airflow range at the port is relatively larger, the airflow velocity is weakened, which ultimately reduces the air pop noise generated when the airflow blows into the air bag 21, thereby achieving noise reduction.

[0101] When the air bag 21 is venting air, the N air valves 13 retract and shrink, the airflow velocity decreases and enters the second pipe 3 relatively slowly, and is transported back to the control component 6 via the second pipe 3. After being adjusted by the control component 6, the air bag 21 is finally discharged.

[0102] Optionally, the N tracheal valves 13 can be configured as multi-valve tracheal bodies 14 formed by cutting along the diameter of the second conduit 3. That is, the N tracheal valves 13 and the second conduit 3 are regarded as an integral structure. The advantage of this arrangement is that no additional parts need to be added. Noise reduction can be achieved by relying solely on the improvement of the second conduit 3 itself. The design concept is ingenious and the noise reduction effect is also good.

[0103] Optionally, the N tracheal valves 13 can be configured such that each tracheal valve 13 is movably connected to the second tubing 3, that is, the N tracheal valves 13 and the second tubing 3 are considered to be a detachable connection structure. The detachable connection method includes, but is not limited to, plugging or snapping. The advantage of this arrangement is that the noise reduction structure 1 can be regarded as a separate component and installed at the end of the second tubing 3 in some way, which greatly increases the flexibility of use.

[0104] Optionally, the shape of the N tracheal valves 13 can be configured such that the cross-sectional area of ​​the N tracheal valves 13 remains consistent from the direction close to the second conduit 3 to the direction away from the second conduit 3, that is, the N tracheal valves 13 are arranged on the second conduit 3 with regular dimensions.

[0105] Optionally, the shape of the N tracheal valves 13 can be configured such that the cross-sectional area of ​​the N tracheal valves 13 gradually decreases from the direction close to the second conduit 3 to the direction away from the second conduit 3, that is, the ends of the N tracheal valves 13 are narrowed. It can also be understood that the shape of the N tracheal valves 13 can be flexibly configured, such as being rectangular, triangular or trapezoidal, but not limited to these.

[0106] Optionally, the length of the N tracheal valves 13 can be configured such that their length is greater than 1.5 times the outer diameter of the second tube 3. The advantage of this configuration is that when the air bag 21 is inflated, the N tracheal valves 13 can have a better opening angle, a larger airflow range, and a better noise reduction effect.

[0107] Optionally, the lengths of the N tracheal valves 13 can be configured to be all of equal length or not all of equal length, that is, the lengths of the tracheal valves 13 can be flexibly configured.

[0108] Optionally, several ventilation holes 18 configured to expand the airflow range can be added to the N tracheal valves 13. When the air bag 21 is inflated, part of the airflow flowing through the tracheal fluid diffuser 12 can be dispersed outward along the ventilation holes 18 and blown into the air bag 21 to further reduce the air pop sound.

[0109] Optionally, the seat pneumatic system can be applied to pneumatic systems for seat massage such as lumbar support massage, leg support massage, back massage, and shoulder massage.

[0110] In the description of this application, it should be understood that the terms "vertical," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0111] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly defined.

[0112] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims. Industrial applicability

[0114] In summary, the embodiments of this application provide a noise reduction structure for an airbag, a pneumatic system, and a seat pneumatic system with a noise reduction structure, which can reduce the air burst noise generated when airflow blows into the airbag, thereby achieving noise reduction and bringing better massage comfort to the occupant. Moreover, the noise reduction structure is simple in structure, easy to assemble, and safe and reliable to use.

Claims

1. A noise reduction structure for an airbag, characterized in that, The noise reduction structure (1) is disposed in the airbag body (2), and the airbag body (2) is configured as an air bag (21) capable of realizing pneumatic adjustment of the seat; an air passage (3) is inserted in the air bag (21), and airflow is blown into the air bag (21) through the air supply component (4) and the air passage (3); The noise reduction structure (1) is configured as a variable airflow dispersion section (11), which is connected to one end of the ventilation pipe (3) away from the air supply component (4); When the air bag (21) is inflated, the high-speed jet of air is blown through the air supply component (4) and the air passage (3) to the variable airflow dispersion part (11). Under the action of airflow dispersion, the variable airflow dispersion part (11) gradually expands and the airflow is dispersed and blown into the air bag (21). When the air bag (21) is venting outwards, the variable airflow dispersion section (11) gradually becomes or has already become closed, and the airflow in the air bag (21) will enter the ventilation pipe (3) relatively slowly and eventually be discharged from the air bag (21).

2. The noise reduction structure according to claim 1, characterized in that: The variable airflow dispersion section (11) is configured as a tubular fluid disperser (12). The tubular fluid disperser (12) includes N tubular flaps (13) (N≥2) arranged around the port of the ventilation pipe (3), and the N tubular flaps (13) are allowed to move in a way that they converge or disperse relative to the ventilation pipe (3); the tubular fluid disperser (12) is always in communication with the ventilation pipe (3) regardless of whether the air bag (21) is in an inflated or deflated state; When the air bag (21) is inflated, the airflow is blown through the ventilation pipe (3) to the air tube fluid disperser (12), and the N air tube flaps (13) are dispersed and opened under the action of the airflow, and the airflow is dispersed and blown into the air bag (21); When the air bag (21) is venting outward, the N air valves (13) retract and shrink, the airflow velocity decreases and enters the ventilation pipe (3) relatively slowly, and finally the air bag (21) is discharged.

3. The noise reduction structure according to claim 2, characterized in that: The N tracheal valves (13) are configured as multi-valve tracheal bodies (14) formed by cutting along their own diameter direction via the ventilation conduit (3), that is, the N tracheal valves (13) and the ventilation conduit (3) are regarded as an integrally formed structure.

4. The noise reduction structure according to claim 2, characterized in that: The N tracheal valves (13) are configured such that each tracheal valve (13) is movably connected to the ventilation line (3), that is, the N tracheal valves (13) and the ventilation line (3) are considered to be a detachable connection structure.

5. The noise reduction structure according to claim 3 or 4, characterized in that: The lengths of the N tracheal valves (13) are configured such that their lengths are greater than 1.5 times the outer diameter of the ventilation tubing (3).

6. The noise reduction structure according to claim 3 or 4, characterized in that: The lengths of the N tracheal valves (13) are configured to be all equal or not all equal.

7. The noise reduction structure according to claim 3 or 4, characterized in that: Several ventilation holes (18) are added to each of the N tracheal valves (13) to expand the airflow range.

8. The noise reduction structure according to any one of claims 3-7, characterized in that: The shapes of the N tracheal valves (13) are configured such that the cross-sectional area of ​​the N tracheal valves (13) remains consistent from the direction close to the ventilation line (3) to the direction away from the ventilation line (3).

9. The noise reduction structure according to any one of claims 3-7, characterized in that: The N tracheal valves (13) are configured such that the cross-sectional area of ​​the N tracheal valves (13) gradually decreases from the direction close to the ventilation line (3) to the direction away from the ventilation line (3).

10. The noise reduction structure according to any one of claims 1-9, characterized in that: A pipe silencer (5) may also be added to the ventilation pipe (3). The pipe silencer (5) is located between the air supply component (4) and the noise reduction structure (1). The pipe silencer (5) is a porous structure (51) formed by the aggregation of densely packed pores. When the air bag (21) is inflated, the airflow first blows through the ventilation pipe (3) to the pipe silencer (5) and is preferentially dispersed from the end of the pipe silencer (5). At this time, the airflow velocity is partially weakened, and the airflow partially blocked by the porous structure (51) will be dispersed from the outer periphery of the porous structure (51), further weakening the airflow velocity, thereby weakening the air explosion sound generated when the airflow is ejected, and achieving primary noise reduction.

11. The noise reduction structure according to claim 10, characterized in that: The pipeline silencer (5) is made of metal materials, including but not limited to copper, aluminum or stainless steel; or, the pipeline silencer (5) is made of non-metal materials, including but not limited to plastic or ceramic.

12. A pneumatic system, characterized in that: The pneumatic system includes the noise reduction structure as described in any one of claims 1-11, comprising: Airbag body (2), the airbag body (2) is configured to realize pneumatic adjustment of the seat; An air supply assembly (4) is configured to deliver flowing gas into the airbag body (2); A control component (6) configured to control the flow of gas into or out of the airbag (2); Ventilation pipe (3) is placed between the air supply component (4) and the airbag body (2), and the noise reduction structure (1) is located at the end of the ventilation pipe (3) away from the air supply component (4).

13. A seat pneumatic system with a noise reduction structure, characterized in that, include: Air supply assembly (2), which is configured as an air bag (21) capable of massaging or supporting the occupant's body; Gas supply assembly (4), which is configured to supply flowing gas into the gas bag (21); A control component (6) configured to control the flow of gas into or out of the gas bag (21); At least one first pipeline (5) is provided between the gas supply assembly (4) and the control assembly (6); At least one second pipe (3) is connected between the control component (6) and the air bag (21), and one end of the second pipe (3) away from the control component (6) extends into the air bag (21); A noise reduction structure (1) is disposed in the air bag (21) and specifically installed at the end of the second pipeline (3) away from the control component (6). The noise reduction structure (1) is configured as a variable airflow dispersion section (11). When the air bag (21) is inflated, the high-speed jet of air is delivered to the control component (6) through the first pipe (5). After being adjusted by the control component (6), the air is blown to the variable airflow dispersion section (11) through the second pipe (3). The variable airflow dispersion section (11) gradually expands under the action of airflow dispersion, and the airflow is dispersed and blown into the air bag (21). When the air bag (21) is venting outwards, the variable airflow dispersion section (11) gradually becomes or has already become converging. The airflow in the air bag (21) will enter the second pipeline (3) relatively slowly through the variable airflow dispersion section (11), and be transported back to the control component (6) through the second pipeline (3). After being adjusted by the control component (6), the air bag (21) is finally discharged.

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