Temperature self-adaptive gas generator

Abstract

The utility model discloses a temperature self-adaptation type gas generator which comprises a generator body, a mounting plate, a gas outlet hole, a gas generating cavity, an igniter and a pressure relief hole are arranged on the generator body, the mounting plate surrounds the outer side face of the generator body, and the mounting plate is fixedly connected with the outer side face of the generator body. The gas generating cavity is formed in the generator body, the multiple gas outlets are evenly distributed in the generator body, the gas outlets are formed in the rear portion of the mounting plate and communicated with the interior of the gas generating cavity, the igniter is arranged in the gas generating cavity, and the front end of the igniter penetrates through the front end face of the generator body and then is arranged in front of the generator body. The igniter is fixedly connected with the generator body, the pressure relief holes are distributed in the front end face of the generator body, and the pressure relief holes communicate with the gas generation cavity. The intelligent pressure regulating valve has the beneficial effects that the internal pressure is intelligently regulated according to the temperature change, so that the stability and the safety in the working process are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of airbag accessories, in particular to a temperature adaptive gas generator. Background Art

[0002] In the prior art, an airbag needs a gas generator to work and inflate. The substances inside the gas generator are relatively dangerous. However, the temperature inside the vehicle will change with the outdoor temperature, and both high and low temperatures will affect the stability and safety of the airbag during operation.

[0003] The gas generator assembly, airbag and vehicle with the Chinese patent publication number CN221293393U and the authorized publication date of July 9, 2024 are disclosed. The utility model discloses a gas generator assembly, an airbag and a vehicle. The gas generator assembly includes: a gas generator, a connecting bracket, a housing and an elastic member. The connecting bracket and the housing are respectively installed at both ends of the gas generator, and the connecting bracket and the housing are connected. The elastic member is clamped between the gas generator and the housing and / or between the gas generator and the connecting bracket. In the gas generator assembly of the embodiment of the utility model, by clamping the elastic member between the gas generator and the housing and / or between the gas generator and the connecting bracket, the elastic member can absorb the vibration of the gas generator, which is beneficial to eliminating abnormal noises and improving the practicability of the gas generator assembly. The disadvantage of this utility model is that it does not consider the change of temperature on the stability and safety of the airbag during operation. Summary of the Utility Model

[0004] The utility model aims to overcome the deficiency in the prior art that the change of temperature on the stability and safety during operation is not considered, and provides a temperature adaptive gas generator that can intelligently adjust the internal pressure according to the temperature change so as to improve the stability and safety during operation.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A temperature adaptive gas generator, comprising a generator body, on which there are an installation plate, an air outlet hole, a gas generation chamber, an igniter and a pressure relief hole. The installation plate surrounds the outer side surface of the generator body and is fixedly connected to the outer side surface of the generator body. The gas generation chamber is arranged inside the generator body. There are several air outlet holes which are evenly distributed on the generator body. The air outlet holes are arranged behind the installation plate and are internally communicated with the gas generation chamber. The igniter is arranged inside the gas generation chamber. The front end of the igniter passes through the front end face of the generator body and is arranged in front of the generator body. The igniter is fixedly connected to the generator body. There are several pressure relief holes which are distributed on the front end face of the generator body. The pressure relief holes are communicated with the gas generation chamber.

[0007] During installation, use the installation plate to install it at the position corresponding to the airbag on the vehicle. Then, ensure that the airbag covers the part of the generator body with the air outlet holes. Connect the igniter to the system controller. During use, when the generator is in a high-temperature working state, the internal pressure of the gas generation chamber is relatively large, and all the pressure relief holes will open simultaneously to effectively release the excess pressure and ensure safety and stability. When the working temperature is normal temperature, only some of the pressure relief holes with larger apertures will open to moderately release the pressure and maintain the system balance. In a low-temperature working state, since the internal pressure is relatively small, all the pressure relief holes will remain closed to prevent unnecessary pressure release, achieving the purpose of intelligently adjusting the internal pressure according to temperature changes to improve the stability and safety during operation.

[0008] Preferably, the inner diameters of the pressure relief holes are different. There is a thin film on the pressure relief holes. The shape of the thin film corresponds to the shape of the pressure relief holes. The front end face of the thin film is connected to the inner wall of the gas generation chamber. Different inner diameters of the pressure relief holes can control the size of the gas outlet volume.

[0009] Preferably, there are several grooves on the inner wall of the gas generation chamber. The grooves correspond to the pressure relief holes one by one. The thin film is placed in the grooves. The front end face of the thin film is connected to the inner wall of the grooves. The grooves facilitate the fixation of the thin film.

[0010] Preferably, the thickness of the thin film becomes thinner as the inner diameter of the pressure relief hole becomes larger. The thicknesses of the thin films are different and can become thinner as the inner diameter of the pressure relief hole becomes larger, which is convenient for the large pressure relief holes to release gas under low pressure, and the thin films of the small pressure relief holes are thick and not easy to release gas, meeting the requirements for pressure.

[0011] Preferably, there is a connecting wire on the igniter. One end of the connecting wire is arranged inside the igniter and is fixedly connected to the igniter. The other end of the connecting wire passes through the front end face of the generator body and is arranged in front of the generator body. The connecting wire facilitates the connection between the igniter and the system controller.

[0012] Preferably, a plurality of mounting holes are provided on the mounting plate, and the mounting holes are evenly distributed on the mounting plate. The mounting holes facilitate the installation of the gas generator.

[0013] The beneficial effects of the present utility model are as follows: the internal pressure is intelligently adjusted according to temperature changes to improve the stability and safety during operation; different inner diameters of the pressure relief holes can control the amount of gas output; the grooves facilitate the fixing of the film; the thicknesses of the films are different, and the film becomes thinner as the inner diameter of the pressure relief hole increases, which facilitates the gas release of the large pressure relief hole under low pressure, and the thick film of the small pressure relief hole is not easily deflated, meeting the pressure requirements; the connecting wires facilitate the connection between the igniter and the system controller; the mounting holes facilitate the installation of the gas generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural view of the present utility model;

[0015] Figure 2 is the front view of the present utility model;

[0016] Figure 3 is Figure 2 the sectional view taken along A-A of

[0017] Figure 4 is Figure 3 the enlarged view of detail C of

[0018] In the figure: 1. Generator body, 2. Mounting plate, 3. Air outlet hole, 4. Gas generation chamber, 5. Igniter, 6. Pressure relief hole, 7. Film, 8. Groove, 9. Connecting wire, 10. Mounting hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following further describes the present utility model in conjunction with the accompanying drawings and specific embodiments.

[0020] As Figures 1 to 3 in the embodiment of, a temperature adaptive gas generator includes a generator body 1, on which there are provided a mounting plate 2, an air outlet hole 3, a gas generation chamber 4, an igniter 5 and a pressure relief hole 6. The mounting plate 2 surrounds the outer side surface of the generator body 1 and is fixedly connected to the outer side surface of the generator body 1. The gas generation chamber 4 is disposed inside the generator body 1. There are a plurality of air outlet holes 3 which are evenly distributed on the generator body 1. The air outlet holes 3 are disposed behind the mounting plate 2 and are internally communicated with the gas generation chamber 4. The igniter 5 is disposed inside the gas generation chamber 4. The front end of the igniter 5 passes through the front end face of the generator body 1 and is disposed in front of the generator body 1. The igniter 5 is fixedly connected to the generator body 1. There are a plurality of pressure relief holes 6 which are distributed on the front end face of the generator body 1. The pressure relief holes 6 are communicated with the gas generation chamber 4.

[0021] AsFigures 1 to 4 As shown, the inner diameters of the pressure relief holes 6 are different. A thin film 7 is provided on the pressure relief holes 6. The shape of the thin film 7 corresponds to the shape of the pressure relief holes 6. The front end face of the thin film 7 is connected to the inner wall of the gas generating chamber 4.

[0022] As Figure 3 and Figure 4 As shown, a number of grooves 8 are provided on the inner wall of the gas generating chamber 4. The grooves 8 correspond to the pressure relief holes 6 one by one. The thin film 7 is placed in the grooves 8. The front end face of the thin film 7 is connected to the inner wall of the grooves 8.

[0023] As Figure 1 and Figure 2 As shown, the thickness of the thin film 7 becomes thinner as the inner diameter of the pressure relief hole 6 becomes larger.

[0024] As Figure 1 , Figure 3 and Figure 4 As shown, a connecting wire 9 is provided on the igniter 5. One end of the connecting wire 9 is placed inside the igniter 5 and fixedly connected to the igniter 5. The other end of the connecting wire 9 passes through the front end face of the generator body 1 and is placed in front of the generator body 1.

[0025] As Figures 1 to 3 As shown, a number of mounting holes 10 are provided on the mounting plate 2. The mounting holes 10 are evenly distributed on the mounting plate 2.

[0026] During installation, the mounting holes 10 on the mounting plate 2 are used to mount the generator body 1 at the corresponding position of the airbag on the vehicle. Then, it is determined that the airbag covers the part of the generator body 1 with the air outlet 3. The air outlet 3 is communicated with the inside of the airbag cover. The igniter 5 is connected to the system controller by the connecting wire 9. During use, due to the different inner diameters of the pressure relief holes 6, the thickness and material of the thin film 7 in the grooves 8 are different, and the thickness of the thin film 7 becomes thinner as the inner diameter of the pressure relief hole 6 becomes larger. When the generator is in a high-temperature working state, the pressure inside the gas generating chamber 4 is relatively large, and all the pressure relief holes 6 will be opened simultaneously to effectively release the excess pressure and ensure safety and stability. When the working temperature is normal temperature, only some of the pressure relief holes 6 with thinner thin films 7 and larger apertures will be opened to moderately release the pressure and maintain the system balance. In the low-temperature working state, since the internal pressure is small, all the pressure relief holes 6 will remain closed to prevent unnecessary pressure release, achieving the purpose of intelligently adjusting the internal pressure according to temperature changes to improve the stability and safety during operation.

Claims

1. A temperature-adaptive gas generator, characterized in that: The generator body (1) comprises a mounting plate (2), an air outlet (3), a gas generating chamber (4), an igniter (5) and a pressure relief hole (6), wherein the mounting plate (2) surrounds the outer surface of the generator body (1), the mounting plate (2) is fixedly connected to the outer side surface of the generator body (1), the gas generating chamber (4) is disposed in the generator body (1), the air outlet (3) is provided in a plurality and is evenly distributed on the generator body (1), and the air outlet (5) is arranged on the outer surface of the generator body (1). (3) is placed behind the mounting plate (2), the gas outlet hole (3) is connected to the interior of the gas generating chamber (4), the igniter (5) is placed in the gas generating chamber (4), the front end of the igniter (5) passes through the front end surface of the generator body (1) and is placed in front of the generator body (1), the igniter (5) is fixedly connected to the generator body (1), there are a plurality of pressure relief holes (6) distributed on the front end surface of the generator body (1), and the pressure relief holes (6) are connected to the gas generating chamber (4).

2. A temperature-adaptive gas generator according to claim 1, characterized in that: The inner diameters of the pressure relief holes (6) are different. A film (7) is provided on the pressure relief holes (6). The shape of the film (7) corresponds to the shape of the pressure relief holes (6). The front end surface of the film (7) is connected to the inner wall of the gas generating chamber (4).

3. A temperature-adaptive gas generator according to claim 2, characterized in that: A plurality of grooves (8) are provided on the inner wall of the gas generating chamber (4), the grooves (8) corresponding to the pressure relief holes (6) one by one, the film (7) is placed in the grooves (8), and the front end surface of the film (7) is connected to the inner wall of the grooves (8).

4. A temperature-adaptive gas generator according to claim 3, characterized in that: The thickness of the film (7) becomes thinner as the inner diameter of the pressure relief hole (6) increases.

5. A temperature-adaptive gas generator according to claim 1, characterized in that: The igniter (5) is provided with a connecting wire (9), one end of the connecting wire (9) is placed inside the igniter (5) and fixedly connected to the igniter (5), and the other end of the connecting wire (9) passes through the front end surface of the generator body (1) and is placed in front of the generator body (1).

6. A temperature-adaptive gas generator according to claim 1, characterized in that: The mounting plate (2) is provided with a plurality of mounting holes (10), and the mounting holes (10) are evenly distributed on the mounting plate (2).

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