Particulate matter emission reduction device suitable for aerospace vehicle

Abstract

The utility model relates to a particulate matter emission reduction device suitable for an aerospace vehicle. The particulate matter emission reduction device comprises a sound production device, a condensation bin and a sound wave phase adjusting mechanism. The condensation bin is a hollow cylinder with two open opposite ends as a whole, and the sound production device and the sound wave phase adjusting mechanism are installed at the two opposite ends of the condensation bin respectively. The condensation bin comprises a cylinder part; a feeding hole and a discharging hole are formed in the first side wall of the barrel body part; a functional opening is formed in the second side wall of the barrel body part; the feeding port and the discharging port are sequentially arranged in a spaced mode in the direction from the sound production device to the sound wave phase adjusting mechanism. According to the utility model, the sounding device and the sound wave phase adjusting mechanism can be integrated in the condensation bin, and the condensation bin has the advantages of compact structure and small volume, so that the condensation bin can be conveniently mounted at the tail part of the rocket nozzle, discharged fine particles can be settled in time and prevented from flowing back, and the service life of the rocket nozzle is prolonged. Therefore, the safety problem caused by insufficient combustion is avoided.

Description

Technical Field

[0001] The utility model relates to the field of environmental protection dust removal, in particular to a particulate matter reduction device applicable to aerospace vehicles. Background Art

[0002] Carbon solid rocket propellant is composed of putty, rubbery combustible materials, aluminum powder, etc., and is a mixture of fuel and oxidizer. There is a narrow cylindrical gap in the center of the rocket body that runs through the core of the propellant, and this gap is called the combustion chamber, which allows the propellant to burn evenly from top to bottom. The nozzle at the bottom of the rocket can discharge the mixed exhaust gas generated in the combustion chamber. During the combustion process of rocket solid propellant, various particulate matters may be generated, including metal oxides such as aluminum oxide, solid residues of metal components, gunpowder residues, etc. If these particulate matters cannot settle in time, they cannot be quickly discharged through the nozzle at the bottom of the rocket, but will flow back and diffuse inside the rocket, which will not only reduce the fuel combustion efficiency but also affect the performance of the engine. In addition, if the fine particulate matters caused by uneven combustion cannot be discharged in time, it will also cause uneven pressure distribution inside the rocket, which may lead to deformation and rupture of the shell and damage to internal components, resulting in serious safety problems. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a particulate matter reduction device applicable to aerospace vehicles.

[0004] To achieve the above-mentioned utility model purpose, the utility model provides a particulate matter reduction device applicable to aerospace vehicles, including: a sound generating device, a condensation chamber, and a sound wave phase adjustment mechanism;

[0005] The condensation chamber is a hollow cylinder with openings at both opposite ends, and the sound generating device and the sound wave phase adjustment mechanism are respectively installed at the opposite ends of the condensation chamber;

[0006] The condensation chamber includes: a cylinder part;

[0007] A first side wall of the cylinder part is provided with a feed inlet and a discharge outlet;

[0008] A second side wall of the cylinder part is provided with a functional port;

[0009] Along the direction from the sound generating device to the sound wave phase adjustment mechanism, the feed inlet and the discharge outlet are arranged at intervals in sequence.

[0010] According to one aspect of the utility model, the cylinder part is further provided with an observation window and a transparent baffle for closing the observation window;

[0011] The observation window is on the same side as the feed inlet and the discharge outlet, and the observation window is located between the feed inlet and the discharge outlet; alternatively, the observation window is provided on the other side opposite to the feed inlet and the discharge outlet;

[0012] The transparent baffle is detachably arranged with the observation window.

[0013] According to one aspect of the present invention, the hollow part of the cylindrical body part is a hollow part with a regular cross-sectional shape.

[0014] According to one aspect of the present invention, the acoustic wave phase adjustment mechanism includes: a connecting sealing plate, a driving mechanism connected to the connecting sealing plate, and a movable baffle connected to the driving mechanism;

[0015] The movable baffle and the driving mechanism are respectively located on opposite sides of the connecting sealing plate;

[0016] The connecting sealing plate is connected to the end of the agglomeration chamber;

[0017] The movable baffle is movably located inside the agglomeration chamber;

[0018] The driving mechanism is used to drive the movable baffle to reciprocate inside the agglomeration chamber.

[0019] According to one aspect of the present invention, the shape of the movable baffle is set to match the cross-sectional shape of the hollow part of the cylindrical body part;

[0020] The movable baffle is an aluminum plate.

[0021] According to one aspect of the present invention, a circumferential side edge of the movable baffle is provided with an annular groove and an annular seal embedded in the annular groove;

[0022] The annular seal is a rubber seal, and the annular seal is provided with a notch;

[0023] Along the radial direction of the annular seal, the opposite ends of the notch are arranged opposite to each other;

[0024] Along the thickness direction of the annular seal, the opposite ends of the notch are arranged in a staggered manner.

[0025] According to one aspect of the present invention, the driving mechanism includes: a connecting rod, and a driving structure connected to the connecting rod;

[0026] One end of the connecting rod is movably connected to the movable baffle, and the other end is connected to the driving structure;

[0027] The connecting rod passes through the connecting sealing plate and is connected to the connecting sealing plate. Wherein, under the driving action of the driving structure, the connecting rod axially drives the movable baffle to reciprocate.

[0028] According to one aspect of the present invention, the connecting rod is a screw rod, and the driving structure is a handle or a motor; or, the connecting rod is a smooth rod, and the driving structure is a handle or an electric cylinder.

[0029] According to one aspect of the present invention, the sound generating device is a BMS sound generating device.

[0030] According to one aspect of the present invention, a switching valve and / or a light source are detachably arranged on the functional port;

[0031] A sound insulation layer is arranged on the inner side wall of the cylindrical body part;

[0032] The sound insulation layer is located between the discharge port and the end connecting the acoustic wave phase adjustment mechanism.

[0033] According to one solution of the present invention, the present invention can integrate both the sound generating device and the acoustic wave phase adjustment mechanism in the condensation chamber, which has the advantages of compact structure and small volume. Furthermore, it can enable the present invention to be conveniently installed at the tail of the rocket nozzle, and the discharged fine particles can be settled in time to avoid their backflow, thereby avoiding safety problems caused by incomplete combustion.

[0034] According to one solution of the present invention, the present invention can effectively reduce the particulate matter emission in the airflow and avoid the corrosion of the device by chemical absorbents.

[0035] According to one solution of the present invention, the present invention can conveniently adjust the position of the movable baffle through the provided acoustic wave phase adjustment mechanism, so as to flexibly adjust the length of the internal space, thereby changing the phase of the reflected acoustic wave and forming a standing wave in the cylindrical body part to achieve the effect of the strongest standing wave energy in the action area.

[0036] According to one solution of the present invention, the present invention uses sound energy as a "catalyst" for particulate matter condensation and sedimentation, can aggregate small particulate matters into large particulate matters for sedimentation, effectively reduce the content of particulate matters in the airflow, and achieve the effects of pollution-free, safe and stable.

[0037] According to one solution of the present invention, the present invention can design the device size in advance according to the actual emission reduction requirements, screen out the optimal frequency to meet the corresponding requirements. In addition, by adjusting the position of the movable baffle, the size of the internal space can be changed according to the corresponding optimal frequency in different scenarios, making the present invention have good versatility. At the same time, the present invention also has the effects of low price of production materials, simple structure and low cost.

[0038] According to one solution of the present utility model, the structure of the present utility model is refined and concise, the volume of the condensation bin main body is small, and the structure is clear, which is convenient for production and manufacturing, and has practical significance for large-scale industrial production. In addition, the present utility model can achieve particulate matter emission reduction without any additional materials. Without the aid of dust removal agents or chemical catalysts, the emission reduction effect is achieved only by using sound waves of a certain frequency, with good environmental benefits and a simple and reliable operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a schematic structural diagram of a particulate matter emission reduction device according to an embodiment of the present utility model;

[0040] Figure 2 is a schematic structural diagram of a sound generating device according to an embodiment of the present utility model;

[0041] Figure 3 is a schematic structural diagram of a condensation bin according to an embodiment of the present utility model;

[0042] Figure 4 is a schematic structural diagram of a sound wave phase adjustment mechanism according to an embodiment of the present utility model;

[0043] Figure 5 is a schematic structural diagram of an annular seal according to an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0045] When describing the embodiments of the present utility model, the orientation or positional relationships expressed by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" are based on the orientation or positional relationships shown in the relevant drawings. It is only for the convenience of describing the present utility model 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. Therefore, the above terms should not be construed as limitations of the present utility model.

[0046] The present utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments cannot be elaborated one by one here, but the embodiments of the present utility model are not limited to the following embodiments.

[0047] Combined with Figure 1 、 Figure 2 、 Figure 3 and Figure 4 shown, according to an embodiment of the present utility model, a particulate matter emission reduction device applicable to aerospace vehicles of the present utility model includes: a sound generating device 1, a condensation chamber 2, and a sound wave phase adjustment mechanism 3; wherein, the condensation chamber 2 is an overall hollow cylinder with openings at both opposite ends, and the sound generating device 1 and the sound wave phase adjustment mechanism 3 are respectively installed at opposite ends of the condensation chamber 2. In this embodiment, the condensation chamber 2 includes: a cylindrical part 21; wherein, a first side wall of the cylindrical part 21 is provided with a feed inlet 21a and a discharge outlet 21b; a second side wall of the cylindrical part 21 is provided with a functional port 21c. In this embodiment, along the direction from the sound generating device 1 to the sound wave phase adjustment mechanism 3, the feed inlet 21a and the discharge outlet 21b are arranged at intervals in sequence.

[0048] In this embodiment, the first side wall is located on one side in the horizontal direction of the cylindrical part 21, and the second side wall is located on the upper side in the vertical direction of the cylindrical part 21; of course, in order to achieve the overall sealing of the cylindrical part 21, the other side walls of the cylindrical part 21 are closed to ensure the integrity of the entire cylindrical part 21.

[0049] In this embodiment, the cylindrical part 21 can be made of a metal material, for example, aluminum alloy, and the specific material of the material can be selected according to actual needs.

[0050] In this embodiment, the condensation chamber 2 further includes: a first flange 22 and a second flange 23; wherein, the first flange 22 and the second flange 23 are fixedly connected at opposite ends of the cylindrical part 21. In this embodiment, the sound generating device 1 is connected to the cylindrical part 21 based on the first flange 22, and among them, the sound generating device 1 can be connected to the first flange 22 by means of a threaded connection. Similarly, the sound wave phase adjustment mechanism 3 is connected to the cylindrical part 21 based on the second flange 23, and among them, the sound wave phase adjustment mechanism 3 can be connected to the second flange 23 by means of a threaded connection.

[0051] With the above settings, the utility model can realize feeding and discharging on the same side by arranging the feeding port 21a and the discharging port 21b on the same side, so that the utility model can be more easily installed on the corresponding engine structure. Furthermore, the gas with particles can be conveniently introduced into the interior of the utility model, and the processed gas can be conveniently reintroduced into the engine through the discharging port arranged on the same side. It is not only convenient to install, but also effectively reduces the entire conveying path, which is more beneficial to the miniaturization of the utility model and enables it to be more easily integrated on the engine.

[0052] Combined with Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, according to an embodiment of the present utility model, the cylindrical part 21 is further provided with an observation window 21d and a transparent baffle 21e for closing the observation window 21d; wherein, the observation window 21d is on the same side as the feeding port 21a and the discharging port 21b, and the observation window 21d is located between the feeding port 21a and the discharging port 21b; in this embodiment, the transparent baffle 21e is detachably arranged with the observation window 21d. In another embodiment, the observation window 21d is arranged on the other side opposite to the feeding port 21a and the discharging port 21b; in this embodiment, the transparent baffle 21e is detachably arranged with the observation window 21d; wherein, the size of the observation window 21d can be set as a rectangular window of 30mm×20mm.

[0053] With the above settings, by arranging the observation window 21d, the internal working state can be conveniently observed, and the working performance of the utility model can be monitored in a timely manner. In addition, through the arranged observation window 21d, the internal part can be conveniently cleaned and maintained by removing the transparent baffle 21e, so as to ensure the maintenance convenience of the utility model.

[0054] Combined with Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, according to an embodiment of the present utility model, the hollow part of the cylindrical part 21 is a hollow part with a regular cross-sectional shape. In this embodiment, the hollow part of the cylindrical part 21 can be set as a hollow part with a rectangular cross-section, a hollow part with a regular polygon cross-section, a hollow part with a circular cross-section, etc. In this embodiment, when the hollow part of the cylindrical part 21 is set as a hollow part with a rectangular cross-section, the size of the hollow part can be 65×65×420mm.

[0055] Combined with Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, according to an embodiment of the present utility model, the acoustic wave phase adjustment mechanism 3 includes: a connecting sealing plate 31, a driving mechanism 32 connected to the connecting sealing plate 31, and a movable baffle 33 connected to the driving mechanism 32; wherein, the connecting sealing plate 31 is connected to the second flange 23 to fix the acoustic wave phase adjustment mechanism 3. In this embodiment, the movable baffle 33 and the driving mechanism 32 are respectively located on opposite sides of the connecting sealing plate 31; wherein, the movable baffle 33 is movably located inside the condensation chamber 2; the driving mechanism 32 is located outside the condensation chamber 2 to drive the movable baffle 33 to reciprocate inside the condensation chamber 2.

[0056] Combined with Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, according to an embodiment of the present utility model, the shape of the movable baffle 33 is set to match the cross-sectional shape of the hollow part of the cylindrical part 21, so as to realize the reciprocating movement of the movable baffle 33 inside the cylindrical part 21 to control the length of the hollow part of the cylindrical part 21 and adjust the acoustic wave phase. In this embodiment, the movable baffle 33 is made of aluminum plate.

[0057] Combined with Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, according to an embodiment of the present utility model, a circumferential side of the movable baffle 33 is provided with an annular groove and an annular seal 331 embedded in the annular groove; in this embodiment, the cross-sectional shape of the annular groove is set to match at least a part of the cross-sectional shape of the annular seal 331; wherein, the provided annular seal 331 is used to eliminate the gap between the sliding baffle 33 and the cylindrical part 21 while keeping the movable baffle 33 sliding, so as to ensure that the acoustic wave is effectively blocked, which is beneficial to ensuring the working performance of the present utility model.

[0058] In this embodiment, the annular seal 331 is a rubber seal. By setting the annular seal 331 as a rubber seal, it has high elasticity. Thus, the surface protrusion height of the annular seal 331 can be adjusted by the depth of the provided annular groove, and based on its elastic deformation ability, the gap can be eliminated, realizing both ensuring the stable movement of the movable baffle 33 and effectively reducing the leakage of acoustic waves to ensure its effect on acoustic wave adjustment.

[0059] As Figure 5As shown, in this embodiment, the annular seal 331 is provided with a notch 331a. Among them, along the radial direction of the annular seal 331, the opposite ends of the notch 331a are arranged opposite to each other; along the thickness direction of the annular seal 331, the opposite ends of the notch 331a are arranged in a staggered manner, that is, the notch 331a is inclined with respect to the annular seal 331. Thus, the openings formed on the opposite sides of the notch 331a in the thickness direction of the annular seal 331 are vertically staggered.

[0060] In this embodiment, the two opposite side surfaces of the notch 331a can be set as rough surfaces or wavy surfaces.

[0061] By the above settings, setting the annular seal 331 in a way with a notch can enable the annular seal 331 to have a certain movement space when being extruded, so as to ensure that the annular seal 331 can be fully accommodated between the movable baffle 33 and the cylindrical part 21, and avoid the obstruction of the movement of the movable baffle 33 caused by excessive extrusion of the annular seal 331. In addition, through the provided notch, the annular seal 331 can also have a certain elongation space when thermally deformed, which is beneficial to ensuring its stable installation.

[0062] By the above settings, the openings on the opposite sides of the notch 331a on the annular seal 331 in the thickness direction are vertically staggered, which can have a certain blocking effect on the movable baffle 33 in the moving direction, so that the set notch 331a does not affect the overall sealing performance, and the surrounding of the movable baffle 33 still has good sealing performance. In addition, the inclined notch 331a arranged on the annular seal 331 can also, based on its inclined manner, cause the notch 331a to be misaligned with the propagation path of the sound wave. Even if the sound wave enters the notch 331a, it can also achieve an inhibitory effect on the transmission of the sound wave, which is beneficial to avoiding the leakage of the sound wave.

[0063] By the above settings, by setting the two opposite side surfaces of the notch 331a as rough surfaces or wavy surfaces, the inhibition of sound wave leakage can be further realized, making the use effect of the present utility model more beneficial.

[0064] Combined Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, according to an embodiment of the present utility model, the driving mechanism 32 includes: a connecting rod 321 and a driving structure 322 connected to the connecting rod 321; wherein, one end of the connecting rod 321 is movably connected to the movable baffle 33, and the other end is connected to the driving structure 322; in this embodiment, the connecting rod 321 passes through the connecting sealing plate 31 and is connected to the connecting sealing plate 31, and wherein, under the driving action of the driving structure 322, the connecting rod 321 drives the movable baffle 33 to reciprocate axially.

[0065] Combined with Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, according to an embodiment of the present utility model, the connecting rod 321 is a screw rod, and wherein, the connecting rod 321 can be threadedly connected to the connecting sealing plate 31 to realize the reciprocating movement of the connecting rod 321 relative to the connecting sealing plate 31 through the rotation of the connecting rod 321. In this embodiment, the end of the connecting rod 321 can be connected to the central position of the movable baffle 33 in a rotating manner, so as to ensure that the movable baffle 33 only makes reciprocating movement. In this embodiment, the end of the connecting rod 321 and the movable baffle 33 can adopt a rotating bearing to realize the corresponding rotating function, so as to improve the reliability of the connection position and effectively avoid wear during long-term use. In this embodiment, the driving structure 322 is a handle or a motor.

[0066] In another embodiment, the connecting rod 321 is a smooth rod, and wherein, the connecting rod 321 is connected to the connecting sealing plate 31 by means of a sliding connection. In this embodiment, a sliding bearing is arranged at the position where the connecting rod 321 is connected to the connecting sealing plate 31 to avoid wear at the sliding position and improve the service life of the present utility model. In this embodiment, the end of the connecting rod 321 is connected to the central position of the movable baffle 33 by means of a fixed connection, and further, the position of the movable baffle 33 can be adjusted by means of pushing and pulling. In this embodiment, the driving structure 322 is a handle or an electric cylinder.

[0067] As Figure 2 shown, according to an embodiment of the present utility model, the sound generating device 1 is a BMS sound generating device; wherein, the sound generating device 1 can be connected to a low-frequency signal generator to emit sound waves at a specified frequency through the sound generating device 1.

[0068] Through the above settings, by adopting the BMS sound generating device, the present utility model can integrate a power supply by itself, which can further miniaturize the present utility model and effectively improve the convenience of use of the present utility model. In addition, the adopted BMS sound generating device has the advantages of being easy to disassemble and assemble and convenient to maintain, so that the present utility model has higher convenience of use.

[0069] Combined with Figure 1 andFigure 3 As shown, according to an embodiment of the present utility model, a switching valve and / or a light source are detachably arranged on the functional port 21c. In this embodiment, the switching valve can be set as an electric switching valve or a pressure relief valve. In this embodiment, the switching valve or the light source is connected to the functional port 21c in a detachable manner. In another embodiment, the switching valve and the light source can be installed on the functional port 21c at the same time. Specifically, a round tube can be arranged on the functional port 21c, wherein one end of the round tube is butted against the functional port 21c, the other end is installed with the light source, and the switching valve can be arranged on the side wall of the round tube, thereby realizing the integrated installation of the switching valve and the light source.

[0070] Through the above settings, the present utility model can effectively ensure the convenience and safety of use by arranging the functional port 21 above. When arranging the switching valve on the functional port 21, the problem of excessive internal pressure can be effectively avoided. And by arranging the light source on the functional port 21, the internal working space can be illuminated, so as to clearly obtain the internal working conditions from the position of the observation window 21d, so as to realize the accurate monitoring of the internal working conditions of the present utility model.

[0071] According to an embodiment of the present utility model, a sound insulation layer is arranged on the inner side wall of the cylinder part 21; wherein, the sound insulation layer is located between the discharge port 21b and the end of the cylinder part 21 connected to the acoustic wave phase adjustment mechanism 3. Specifically, one end of the sound insulation layer is arranged flush with the end of the cylinder part 21, and the other end is arranged flush with the edge of the discharge port 21b.

[0072] In this embodiment, the edge of the movable baffle 33 is in contact with the sound insulation layer, so as to further fill the gap at the edge position of the movable baffle 33 through the sound insulation layer, so as to effectively increase the sealing performance at the edge position. In this embodiment, the moving distance of the movable baffle 33 is less than or equal to the length of the sound insulation layer, so that the moving range of the movable baffle 33 matches the length of the sound insulation layer, so as to realize that the entire moving range of the movable baffle 33 can have reliable sealing performance. In addition, the arranged sound insulation layer can also generate a sound absorption effect at the edge position of the movable baffle 33, which can further effectively avoid the leakage of sound waves, so that the effect of the adjustment structure of the present utility model is better.

[0073] The above content is only an example of the specific scheme of the present utility model. For the equipment and structures not described in detail therein, it should be understood that the existing general equipment and general methods in the art are adopted for implementation.

[0074] The above is only one solution of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A particle emission reduction device suitable for aerospace vehicles, characterized in that: include: A sound generating device (1), a condensation chamber (2) and a sound wave phase adjustment mechanism (3); The condensation chamber (2) is in the form of a hollow cylinder with openings at two opposite ends, and the sound generating device (1) and the sound wave phase adjustment mechanism (3) are respectively installed at two opposite ends of the condensation chamber (2); The coagulation bin (2) comprises: a cylinder part (21); The first side wall of the barrel portion (21) is provided with a feed inlet (21a) and a discharge outlet (21b); The second side wall of the cylindrical portion (21) is provided with a functional opening (21c); Along the direction from the sound generating device (1) to the sound wave phase adjustment mechanism (3), the feed port (21a) and the discharge port (21b) are arranged in sequence with intervals.

2. The particulate matter reduction device according to claim 1, characterized in that: The cylinder part (21) is also provided with an observation window (21d) and a transparent baffle (21e) for closing the observation window (21d); The observation window (21d) is located on the same side as the feed port (21a) and the discharge port (21b), and the observation window (21d) is located between the feed port (21a) and the discharge port (21b); or, the observation window (21d) is arranged on the other side opposite to the feed port (21a) and the discharge port (21b); The transparent baffle (21e) and the observation window (21d) are detachably arranged.

3. The particulate matter reduction device according to claim 2, characterized in that: The hollow portion of the cylindrical part (21) is a hollow portion with a regular cross-section.

4. The particulate matter reduction device according to claim 3, characterized in that: The sound wave phase adjustment mechanism (3) comprises: a connecting sealing plate (31), a driving mechanism (32) connected to the connecting sealing plate (31), and a movable baffle (33) connected to the driving mechanism (32); The movable baffle (33) and the driving mechanism (32) are respectively located on two opposite sides of the connecting sealing plate (31); The connecting sealing plate (31) is connected to the end of the condensation bin (2); The movable baffle (33) is movably located inside the condensation bin (2); The driving mechanism (32) is used to drive the movable baffle (33) to move back and forth inside the condensation bin (2).

5. The particulate matter reduction device according to claim 4, characterized in that: The shape of the movable baffle (33) is arranged to match the cross-sectional shape of the hollow portion of the barrel portion (21); The movable baffle (33) is an aluminum plate.

6. The particulate matter reduction device according to claim 5, characterized in that: The circumferential side edge of the movable baffle (33) is provided with an annular groove and an annular sealing member (331) embedded in the annular groove; The annular seal (331) is a rubber seal, and the annular seal (331) is provided with a notch (331a); Along the radial direction of the annular seal (331), opposite ends of the notch (331a) are arranged opposite to each other; Along the thickness direction of the annular seal (331), the opposite ends of the notch (331a) are arranged in a staggered manner.

7. The particulate matter reduction device according to claim 6, characterized in that: The driving mechanism (32) comprises: a connecting rod (321), and a driving structure (322) connected to the connecting rod (321); One end of the connecting rod (321) is movably connected to the movable baffle (33), and the other end is connected to the driving structure (322); The connecting rod (321) passes through the connecting sealing plate (31) and is connected to the connecting sealing plate (31), wherein, under the driving action of the driving structure (322), the connecting rod (321) drives the movable baffle (33) to move back and forth in the axial direction.

8. The particulate matter reduction device according to claim 7, characterized in that: The connecting rod (321) is a screw rod, and the driving structure (322) is a handle or a motor; or, the connecting rod (321) is a bare rod, and the driving structure (322) is a handle or an electric cylinder.

9. The particulate matter reduction device according to claim 8, characterized in that: The sound-generating device (1) is a BMS sound-generating device.

10. The particulate matter reduction device according to claim 9, characterized in that: The functional port (21c) is detachably provided with a switch valve and / or a light source; A sound insulation layer is provided on the inner side wall of the cylinder part (21); The sound insulation layer is located between the discharge port (21b) and the end connected to the sound wave phase adjustment mechanism (3).

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