Ignition-filter integrated gas generator

Abstract

The application discloses a kind of ignition-filter function integration gas generator, belong to gas generator field, including shell and setting in shell propellant, and by outlet component the propellant is encapsulated in the shell, and setting ignition-filter component in shell, and setting filter chamber and medicine box chamber respectively in ignition-filter component, to be ignited by ignition propellant in medicine box chamber to propellant, and by filter chamber to the gas generated by propellant ignition is discharged from shell after two-stage filtration, to make full use of the internal space of gas generator, realize ignition-filter integration, and improve the cleanliness of discharge gas, satisfy corresponding actuator work demand.The ignition-filter function integration gas generator of the application, its structure is compact, arrangement is reasonable, can make full use of the space of gas generator to the gas two-stage filtration, with low cost, strong versatility Characteristics, with good application prospect and popularization value.

Description

Technical Field

[0001] This invention belongs to the field of gas generator technology, specifically relating to a gas generator with integrated ignition and filtration functions. Background Technology

[0002] Gas generators are mainly used to provide gas to actuators. However, the gas produced by combustion in a gas generator usually contains a lot of impurities, such as dust, dirt, and grease. If the combustion gas is used directly for the actuator, it may cause problems such as blockage, wear, and corrosion, which will affect the normal operation of the actuator and may even cause malfunctions. Therefore, gas generators usually filter the gas before it is discharged or before it enters the actuator.

[0003] Due to the limited internal space of the gas generator, it is often necessary to install a separate filtration device downstream to filter the gas output from the gas generator in order to ensure the cleanliness of the gas. However, this also results in a bulky and complex system structure, and the limited space on the top floor makes it difficult to meet the system layout requirements.

[0004] Furthermore, the redundancy design of the ignition sequence in gas generators typically only considers the primary pyrotechnic components, neglecting the secondary pyrotechnic component, the ignition cartridge, resulting in low ignition reliability. Therefore, how to improve existing gas generators to overcome these problems is a pressing issue for those skilled in the art. Summary of the Invention

[0005] In view of one or more of the above-mentioned defects or improvement needs of the prior art, the present invention provides an integrated ignition-filtration gas generator, which can filter the gas twice in the limited internal space of the gas generator before discharge, so as to improve the cleanliness of the discharged gas.

[0006] To achieve the above objectives, the present invention provides an integrated ignition-filtration gas generator, which includes a housing and a propellant charge disposed within the housing, and the propellant charge is encapsulated within the housing via an outlet component; It also includes at least one ignition-filter component; The ignition-filtering component is connected and disposed on the side of the outlet component near the housing, including a filter chamber and a medicine box chamber connected and disposed thereon. One end of the medicine box chamber is connected to the igniter and the other end is connected to the inner cavity of the housing, and an ignition tablet is filled in the medicine box chamber. The filter chamber is connected to the housing through a first filter element and to the outside through a second filter element. The gas inside the housing can enter the filter chamber through the first filter element for primary filtration and can be discharged from the housing after secondary filtration through the second filter element.

[0007] As a further improvement of the present invention, the filter chamber is disposed between the outlet component and the medicine box chamber, one end of the filter chamber is fixedly connected to the outlet component, and the other end is connected to the medicine box chamber through a third filter element; The first filter element is disposed around the circumference of the filter chamber, and the gas inside the housing can enter the filter chamber through primary filtration by the first filter element and the third filter element.

[0008] As a further improvement of the present invention, the ignition-filter component further includes an air intake tube and a medicine box holder. One end of the air intake tube is connected to the igniter, and the other end is connected to the medicine box chamber. The medicine box chamber is connected to the igniter through the air intake tube. The medicine box holder is located at the end of the medicine box chamber opposite to the air inlet tube, and at least one vent is provided on the medicine box holder. The medicine box chamber communicates with the inner cavity of the shell through the vent.

[0009] As a further improvement of the present invention, the outlet component includes a flange and a connecting layer. The flange is fixedly connected to the housing, and the connecting layer is disposed on the side of the flange near the housing and is connected to the ignition-filter component through the connecting layer. The flange is provided with at least one vent hole and at least one air duct hole; One end of the air intake tube passes through the air intake hole and is connected to the igniter, and the other end passes through the filter chamber and is connected to the medicine box chamber; and the end of the air intake hole near the igniter is sealed, and the other end is connected to the filter chamber through the second filter element; One end of the vent is connected to the outside, and the other end is connected to the air intake hole.

[0010] As a further improvement of the present invention, two ignition-filter components are provided inside the housing, and two air intake holes and one vent hole are correspondingly provided on the outlet component; The ventilation hole includes a horizontal hole and two inclined holes. The two inclined holes are arranged corresponding to the two air intake holes. One end of the inclined hole is connected to the horizontal hole, and the other end is connected to the corresponding air intake hole, forming a "Y"-shaped ventilation hole.

[0011] As a further improvement of the present invention, the first filter element and the third filter element are coarse filter screens, and the second filter element is a fine filter screen; The coarse filter screen is made of stainless steel with a diameter of φ0.35mm, with a compression rate of 25%~30% and a filtration accuracy of not less than 100μm, for coarse filtration of the gas. The fine filter screen is made of stainless steel wire with a diameter of φ0.25mm, with a compression rate of 35% to 50% and a filtration accuracy of not less than 50μm, so as to further fine filter the gas after coarse filtration.

[0012] As a further improvement of the present invention, the end of the igniter away from the gas vent tube is connected to the ignition cable to receive the ignition command through the ignition cable. and / or The end of the vent facing away from the housing is connected to the gas storage device via a conduit component to store the filtered gas.

[0013] As a further improvement of the present invention, a plurality of fixed lugs are provided axially at intervals on the outer peripheral wall of the housing to axially limit the gas generator.

[0014] As a further improvement of the present invention, an insulation layer and a liner are sequentially provided between the housing and the drug cartridge, the liner being provided between the insulation layer and the drug cartridge to bond the drug cartridge to the insulation layer through the liner.

[0015] As a further improvement of the present invention, the shell is made of carbon fiber or epoxy composite material and is formed by mesh winding method.

[0016] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0017] In summary, the beneficial effects of the above-described technical solutions conceived by this invention compared with the prior art include: (1) The ignition-filtration integrated gas generator of the present invention provides an ignition-filtration component in the housing, and provides a filter chamber and a medicine box chamber in the ignition-filtration component respectively, so that the medicine column is ignited by the ignition tablet in the medicine box chamber, and the gas generated by the ignition of the medicine column is filtered in two stages by the filter chamber before being discharged from the housing, so as to make full use of the internal space of the gas generator, realize the integration of ignition and filtration, improve the cleanliness of the discharged gas, and meet the working requirements of the corresponding actuator.

[0018] (2) The ignition-filtration integrated gas generator of the present invention connects one end of the filter chamber to the medicine box chamber through a third filter element so that after the ignition tablet in the medicine box chamber is ignited, filtered gas is introduced into the filter chamber through the medicine box chamber, so as to make full use of the medicine box chamber to expand the gas discharge channel and improve the gas discharge efficiency.

[0019] (3) The integrated ignition-filtration gas generator of the present invention, by setting two ignition-filtration components in the housing and adopting a dual-circuit redundant design, realizes the primary and secondary ignition sequences, thereby improving the reliability of the gas generator ignition. By setting the first and third filter elements as coarse filters and the second filter element as a fine filter, multi-stage filtration of gas is realized, thereby improving filtration efficiency.

[0020] (4) The integrated ignition-filtration gas generator of the present invention provides thermal protection for the shell by setting an insulation layer between the shell and the propellant, thereby reducing the impact of high-temperature gas on the shell; and provides a liner between the insulation layer and the propellant to firmly bond the propellant to the insulation layer, thereby mitigating stress transmission between the propellant and the insulation layer. The shell is constructed by winding carbon fiber or epoxy composite material to improve its heat resistance, specific strength / specific modulus, and reduce its mass. (5) The integrated ignition-filtration gas generator of the present invention has a compact structure and reasonable layout. It can make full use of the space of the gas generator to filter the gas. It has the characteristics of low cost and strong versatility, and has good application prospects and promotion value. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the integrated ignition-filtration gas generator in an embodiment of the present invention; Figure 2 This is an enlarged view of part A of the integrated ignition-filtration gas generator in this embodiment of the invention; Figure 3 This is a schematic diagram of the propellant loading component structure of the integrated ignition-filtration gas generator in an embodiment of the present invention; Figure 4 This is a schematic diagram of the ignition-filtration component structure of the integrated ignition-filtration gas generator in an embodiment of the present invention; Figure 5 This is a schematic diagram of the outlet component structure of the integrated ignition-filtration gas generator in an embodiment of the present invention; In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. Propellant loading component; 101. End cap; 102. Shell; 103. Fixing lug; 104. Insulation layer; 105. Liner; 106. Propellant charge; 2. Outlet component; 201. Flange; 202. Connecting layer; 203. Vent; 204. Air vent; 3. Ignition-filtration component; 301. Propellant cartridge body; 3011. Propellant cartridge chamber; 3012. Filter chamber; 302. Propellant charge. 303. Air intake tube; 304. First filter element; 305. Second filter element; 306. Third filter element; 307. First aluminum foil sheet; 308. Second aluminum foil sheet; 309. Ignition tablet; 4. Ignition device; 5. Ignition cable; 6. Adapter; 7. First seal; 8. Second seal; 9. Third seal; 10. Fourth seal; 11. Stud; 12. Nut; 13. Conduit assembly; 14. Gas storage device; 15. Fifth seal. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0024] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 invention 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 invention.

[0025] Furthermore, the terms "first" and "second" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this invention, unless otherwise explicitly 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] Example: Please see Figures 1-5 The integrated ignition-filtration gas generator in a preferred embodiment of the present invention includes a charging component 1, an outlet component 2, and an ignition-filtration component 3. The outlet component 2 is fixedly disposed at one end of the charging component 1. One end of the ignition-filtration component 3 is connected to the outlet component 2, and the other end is placed inside the charging component 1. It is used to ignite the charging component 1, filter the gas generated by the charging component 1, and discharge it through the outlet component 2.

[0029] Specifically, such as Figure 3 As shown, in the preferred embodiment, the charge component 1 includes a housing 102 and a charge 106. The housing 102 is a cylindrical structure with one end open and the other end closed. It has a certain internal space for filling the charge 106 and accommodating the ignition-filter component 3. The charge 106 is sealed in the housing 102 through the outlet component 2.

[0030] Preferably, a heat insulation layer 104 is provided between the shell 102 and the propellant 106 to provide thermal protection for the inner wall of the shell 102. More preferably, the heat insulation layer 104 is vulcanized EPDM rubber. At the same time, a liner 105 is provided between the heat insulation layer 104 and the propellant 106 to firmly bond the propellant 106 to the heat insulation layer 104, thereby mitigating stress transmission between the propellant 106 and the heat insulation layer 104. The liner 105 is preferably an LN128 formulation with strong adhesive properties.

[0031] In the preferred embodiment, the shell 102 is preferably made of carbon fiber / epoxy composite material with high specific strength / specific modulus and good molding process, and is formed by mesh winding method, which has the characteristics of light weight, good heat resistance and high specific strength / specific modulus; the propellant 106 is preferably fixed by wall casting and integral molding.

[0032] Meanwhile, a cap 101 is provided at the open end of the shell 102 to achieve a fixed connection with the outlet component 2. The cap 101 is preferably made of titanium alloy material with low density and high strength.

[0033] Preferably, a plurality of fixing lugs 103 are axially spaced protruding on the outer peripheral wall of the housing 102 to axially limit the gas generator. In the preferred embodiment, the fixing lugs 103 are T-shaped, with one end embedded and fixed inside the housing 102, such as... Figure 2 As shown, four fixed lugs 103 are symmetrically arranged on the upper and lower sides of the housing 102 and spaced apart along the axial direction. More preferably, the material of the fixed lugs 103 is titanium alloy.

[0034] Further, in the preferred embodiment, the ignition-filtering component 3 is configured to be at least one, which is connected to the side of the outlet component 2 near the housing 102, including a medicine box body 301, and dividing the medicine box body 301 into a filter chamber 3012 and a medicine box chamber 3011; wherein, one end of the medicine box chamber 3011 is connected to the igniter 4, and the other end is connected to the inner cavity of the housing 102, and an ignition tablet 309 is filled in the medicine box chamber 3011 so that the ignition tablet 309 is ignited by the igniter 4, and the ignition tablet 309 ignites the propellant column 106 in the housing 102.

[0035] Accordingly, the filter chamber 3012 is connected to the housing 102 through the first filter element 304 and to the outside through the second filter element, so that the gas generated after the ignition of the propellant column 106 can first pass through the first filter element 304 for a first filtration before entering the filter chamber 3012, and then pass through the second filter element 305 for a second filtration before being discharged from the housing 102.

[0036] It is understood that "connection to the outside world" in this application refers to connection to the outside of the housing 102. It is not limited to the external environment, but can also be connected to other external devices, etc. The key point is to distinguish between the inside and outside of the housing 102.

[0037] like Figure 4In the preferred embodiment shown, the filter chamber 3012 is disposed between the outlet component 2 and the medicine box chamber 3011. One end of the filter chamber 3012 is fixedly connected to the outlet component 2, and the other end is connected to the medicine box chamber 3011 through a third filter element. The first filter element 304 is disposed around the circumference of the filter chamber 3012, so that the gas in the housing 102 can not only directly enter the filter chamber 3012 through the first filter element 304, but also, after the ignition tablet 309 in the medicine box chamber 3011 has burned out, the gas in the housing 102 first enters the medicine box chamber 3011, and then enters the filter chamber 3012 through the third filter element 306. At the same time, the gas is filtered for the first time by the first filter element 304 and the third filter element 306, so as to make full use of the medicine box chamber 3011, expand the gas discharge channel, and improve the gas discharge efficiency.

[0038] In actual setup, the first filter element 304 and the third filter element 306 are both filter screens made of stainless steel with a diameter of φ0.35mm, with a compression rate of 25%~30% and a filtration accuracy of not less than 100μm, for coarse filtration of the gas; correspondingly, the second filter element 305 is a filter screen made of stainless steel wire with a diameter of φ0.25mm, with a compression rate of 35%~50% and a filtration accuracy of not less than 50μm, for further fine filtration of the coarsely filtered gas.

[0039] Preferably, a cross-shaped skeleton feature is provided inside the filter chamber 3012 corresponding to the third filter element 306 to provide auxiliary support for the third filter element 306.

[0040] Furthermore, in the preferred embodiment, the ignition-filter component 3 further includes an air intake pipe 303 and a medicine box holder 302. One end of the air intake pipe 303 is connected to the igniter 4, and the other end is connected to the medicine box chamber 3011, so as to achieve communication between the medicine box chamber 3011 and the igniter 4 through the air intake pipe 303. Correspondingly, the medicine box holder 302 is connected to the end of the medicine box chamber 3011 opposite to the air intake pipe 303, and at least one vent hole is provided on the medicine box holder 302, so as to achieve communication between the medicine box chamber 3011 and the inner cavity of the housing 102 through the vent hole.

[0041] In a preferred embodiment, 25 vent holes are provided on the medicine box holder 302 and are evenly arranged in a spoke-like pattern along the circumference to ensure that the gas generated by the ignition tablet 309 can quickly enter the housing 102. Accordingly, during venting, the gas can quickly enter the medicine box chamber 3011 through multiple vent holes and enter the filter chamber 3012 through the third filter element 306.

[0042] Preferably, a first aluminum foil 307 and a second aluminum foil 308 are respectively provided at both ends of the medicine box chamber 3011 corresponding to the air inlet tube 303 and the medicine box base 302, so as to achieve self-sealing and moisture-proofing of the medicine box chamber 3011.

[0043] like Figure 1 In the preferred embodiment shown, two ignition-filter components 3 are provided in the propellant loading component 1, and two igniters 4 are provided for each ignition-filter component 3, so as to adopt a dual-circuit redundancy design to ensure the reliability of gas generator ignition.

[0044] In actual installation, the medicine box body 301, medicine box base 302 and air inlet tube 303 are all made of stainless steel 310s. The air inlet tube 303 is fixed to the second filter element 305 and the third filter element 306 and the circumferential seam of the medicine box body 301 by argon arc welding. The first filter element 304, which is arranged around the circumference, is fixed to the flange at the other end of the medicine box body 301 by screwing the medicine box base 302.

[0045] Furthermore, in the preferred embodiment, the outlet component 2 includes a flange 201 and a connecting layer 202, so as to be fixedly connected to the housing 102 through the flange 201; correspondingly, the connecting layer 202 is disposed on the side of the flange 201 near the housing 102, so as to fix the ignition-filter component 3 to the outlet component 2 through the connecting layer 202 and seal with the end face of the ignition-filter component 3.

[0046] like Figure 5 In the preferred embodiment shown, threaded holes are provided at corresponding positions on the flange 201 and the end cap 101, and a fastening connection between the two is achieved using studs 11 and nuts 12.

[0047] Preferably, a first sealing element 7 is provided between the connecting end faces of the flange 201 and the end cap 101 to seal the connecting end faces between the two. In a preferred embodiment, the first sealing element 7 is a hollow metal O-ring, and more preferably, the hollow metal O-ring is a perforated stainless steel material; at the same time, corresponding to the setting of the O-ring, an annular groove is also provided on the connecting end face of the end cap 101 to place the O-ring in the annular groove.

[0048] Meanwhile, in the preferred embodiment, the connecting layer 202 is a vulcanized layer, preferably vulcanized from EPDM rubber, and is sealed to the end face of the medicine box body 301 by hard contact pressing to prevent gas from entering the gas flow channel from the top of the medicine box body 301.

[0049] Furthermore, at least one vent hole 203 and at least one air intake hole 204 are sequentially provided on the flange 201; wherein, one end of the air intake pipe 303 passes through the air intake hole 204 and communicates with the igniter 4, the other end passes through the filter chamber 3012 and through the third filter element 306 and communicates with the medicine box chamber 3011, and seals the end of the air intake hole 204 near the igniter 4, and the other end communicates with the filter chamber through the second filter element 305.

[0050] Accordingly, one end of the vent 203 is connected to the air intake 204, and the other end is connected to the outside, thereby realizing the connection between the filter chamber 3012 and the outside.

[0051] Preferably, the inner diameter of the vent 203 is at least 11 mm to ensure that the gas does not become blocked when it flows out through the vent 203.

[0052] Preferably, flange 201 is made of titanium alloy.

[0053] like Figure 2 In the preferred embodiment shown, the gas vent pipe 303 and the igniter 4 are connected via an adapter 6, and the adapter 6 is fixed to the end of the gas vent 204. Simultaneously, the adapter 6 is sealed to the igniter 4 via a second seal 8, sealed to the gas vent 204 via a third seal 9, and sealed to the gas vent pipe 303 via a fourth seal 10, thereby achieving a seal at one end of the gas vent 204 and preventing gas leakage from the housing 102.

[0054] Meanwhile, in the preferred embodiment, two air intake holes 204 and one vent hole 203 are provided on the flange 201 for the two ignition-filter components 3. The vent hole 203 includes a horizontal hole and two inclined holes. The two inclined holes are provided for the two air intake holes 204 respectively. One end of each inclined hole is connected to the corresponding air intake hole 204, and the other end is connected to the horizontal hole, so as to form a "Y"-shaped vent hole 203 on the flange 201.

[0055] Furthermore, in a preferred embodiment, the end of the igniter 4 facing away from the outlet component 2 is connected to the ignition cable 5 so as to receive the ignition command through the ignition cable 5 and transmit it to the igniter 4 for ignition.

[0056] Furthermore, in an embodiment of the present invention, a gas storage device 14 is provided corresponding to the discharged gas to store the discharged gas.

[0057] like Figure 1 As shown, the gas storage device 14 is connected to the end of the vent 203 away from the drug loading component 1 via the conduit component 13, and the two ends of the conduit component 13 are sealed with the fifth sealing element 15 to ensure the airtightness of the connection between the vent 203 and the gas storage device 14.

[0058] Further, the working principle of a specific embodiment of the present invention is as follows: After the gas generator receives the ignition signal, it transmits it to the igniter 4 via the ignition cable 5. The gas generated by the igniter 4 breaks the membrane ignition and ignites the first aluminum foil 307 in the filter component 3, and ignites the ignition tablet 309. The gas generated by the ignition tablet 309 breaks the membrane of the second aluminum foil 308, and passes through the exhaust hole on the medicine box seat 302 to ignite the medicine column 106 in the medicine loading component 1. Due to the action of the high-temperature gas, the first aluminum foil 307 and the second aluminum foil 308 melt and burn out in this process. The gas generated by the ignition of the medicine column 106 not only enters the filter chamber 3012 from the periphery of the filter chamber 3012 and through the first filter element 304 for coarse filtration, but also enters the medicine box chamber 3011 from the exhaust hole of the medicine box seat 302 and enters the filter chamber 3012 through the third filter element 306 for coarse filtration. Accordingly, after entering the filter chamber 3012, the gas is finely filtered by the second filter element 305 and then output as clean gas downstream through the vent 203 on the outlet component 2 to meet the working requirements of the corresponding actuator.

[0059] The integrated ignition-filtration gas generator of this invention has a simple structure and can be reliably and safely tested simultaneously under high pressure and motion environments. It features a wide testing range, a simple and convenient testing process, and high testing speed. Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A gas generator integrating ignition and filtration functions, comprising a housing and a propellant charge disposed within the housing, wherein the propellant charge is encapsulated within the housing via an outlet component; characterized in that, It also includes at least one ignition-filter component; The ignition-filtering component is connected and disposed on the side of the outlet component near the housing, including a filter chamber and a medicine box chamber connected and disposed thereon. One end of the medicine box chamber is connected to the igniter and the other end is connected to the inner cavity of the housing, and an ignition tablet is filled in the medicine box chamber. The filter chamber is disposed between the outlet component and the medicine box chamber. The filter chamber is connected to the inner cavity of the housing through a first filter element and to the outside through a second filter element. One end of the filter chamber is fixedly connected to the outlet component, and the other end is connected to the medicine box chamber through a third filter element. The first filter element is disposed around the circumference of the filter chamber. The gas in the housing can enter the filter chamber through the first and third filter elements for primary filtration, and can be discharged from the housing after secondary filtration through the second filter element.

2. The integrated ignition-filtration gas generator according to claim 1, characterized in that, The ignition-filtering component also includes an air intake tube and a medicine box holder. One end of the air intake tube is connected to the igniter, and the other end is connected to the medicine box chamber. The medicine box chamber is connected to the igniter through the air intake tube. The medicine box holder is located at the end of the medicine box chamber opposite to the air inlet tube, and at least one vent is provided on the medicine box holder. The medicine box chamber is connected to the inner cavity of the shell through the vent.

3. The integrated ignition-filtration gas generator according to claim 2, characterized in that, The outlet component includes a flange and a connecting layer. The flange is fixedly connected to the housing, and the connecting layer is disposed on the side of the flange near the housing and is connected to the ignition-filter component through the connecting layer. The flange is provided with at least one vent hole and at least one air duct hole; One end of the air intake tube passes through the air intake hole and is connected to the igniter, and the other end passes through the filter chamber and is connected to the medicine box chamber; and the end of the air intake hole near the igniter is sealed, and the other end is connected to the filter chamber through the second filter element; One end of the vent is connected to the outside, and the other end is connected to the air intake hole.

4. The integrated ignition-filtration gas generator according to claim 3, characterized in that, Two ignition-filter components are provided inside the housing, and two air intake holes and one vent hole are correspondingly provided on the outlet component; The ventilation hole includes a horizontal hole and two inclined holes. The two inclined holes are provided corresponding to the two air intake holes. One end of the inclined hole is connected to the horizontal hole, and the other end is connected to the corresponding air intake hole, forming a "Y"-shaped ventilation hole.

5. The integrated ignition-filtration gas generator according to claim 1, characterized in that, The first filter element and the third filter element are coarse filters, and the second filter element is a fine filter. The coarse filter screen is made of stainless steel with a diameter of φ0.35mm, with a compression rate of 25%~30% and a filtration accuracy of not less than 100μm, for coarse filtration of the gas. The fine filter screen is made of stainless steel wire with a diameter of φ0.25mm, with a compression rate of 35% to 50% and a filtration accuracy of not less than 50μm, so as to further fine filter the gas after coarse filtration.

6. The integrated ignition-filtration gas generator according to claim 2, characterized in that, The end of the igniter away from the gas vent tube is connected to the ignition cable to receive the ignition command through the ignition cable; and / or The end of the vent facing away from the housing is connected to the gas storage device via a conduit component to store the filtered gas.

7. The integrated ignition-filtration gas generator according to any one of claims 1 to 6, characterized in that, Multiple fixed lugs are provided axially at intervals on the outer peripheral wall of the housing to axially limit the gas generator.

8. The integrated ignition-filtration gas generator according to claim 7, characterized in that, An insulation layer and a liner are sequentially disposed between the housing and the drug cartridge. The liner is disposed between the insulation layer and the drug cartridge to bond the drug cartridge to the insulation layer.

9. The integrated ignition-filtration gas generator according to claim 8, characterized in that, The shell is made of carbon fiber or epoxy composite material and is formed by mesh winding.

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