JPS5847379B2 - gas - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combustion type gas generator used to inflate passenger protection air cushions, water rescue equipment, etc. by burning a gas generating agent such as gunpowder to rapidly generate gas. The present invention relates to a method of filling a gas coolant (hereinafter referred to as coolant).

This type of gas generator is roughly divided into two types, radial jet gas generator and axial jet gas generator, depending on the direction of gas flow.

The method for manufacturing the radial jet gas generator will be described below with reference to FIG.

(1) Casing 1 having multiple gas nozzles 2 on the circumferential side
A filter 3 for capturing solid combustion by-products and a wire mesh 4a for preventing coolant from spilling are placed immediately inside.

A breathable cylindrical member 5 is disposed in the center of the casing 1,
The inside of the casing 1 is divided into a combustion chamber 6 and a cooling chamber 7.

A wire mesh 4 for preventing coolant from spilling is placed on the outside of the breathable cylindrical member 5.
b, and spacer wire mesh 8 is placed on the inside.

(2) Fill the cooling chamber 7 with the coolant 9 to a predetermined height.

(3) After filling the cooling chamber 7 with the coolant 9, the disc-shaped lid 1
0 to the casing 1 all around to seal the cooling chamber 7.

(4) Next, after loading the gas generating agent 12 into the combustion chamber 6 from the ignition mounting hole 11 of the casing 1,
3 and sealing the combustion chamber 6 completes the process.

The method for manufacturing the axially ejected gas generator is similar, and will be explained below based on FIG. 3.

(1) Insert the spacer wire mesh 28, the ventilation disk 25, and the coolant spill prevention wire mesh 24b into the casing 21 in this order, and connect the inside of the casing 21 to the combustion chamber 26 and the cooling chamber 27.
I will refrain from doing so.

(2) Fill the cooling chamber 27 with the coolant 9 to a predetermined height.

(3) After filling the cooling chamber 27 with the coolant 9, insert the wire mesh 24a1 filter 23 for preventing coolant spillage, and then insert the disk-shaped lid 30 having a large number of gas nozzles 22 into the casing 21 completely. The cooling chamber 27 is sealed by circumferential welding.

(4) After loading the gas generating agent 12 into the combustion chamber 26 from the igniter mounting hole 31 of the casing 21, the igniter 1
3 and sealing the combustion chamber 26 completes the process.

Next, the gas generating function of the gas generator manufactured as described above will be described as follows, taking a radial jet type gas generator as an example.

(1) An external signal causes current to flow through the ignition 13, causing it to ignite.

(2) This ignition energy ignites and burns the generator 12 loaded in the combustion chamber 6.

(3) The high-temperature gas produced by combustion and containing solid combustion byproducts passes through the spacer wire mesh 8, the breathable cylindrical member 5, and the coolant spill prevention wire mesh 4b, and passes through the coolant 9.
enters the cooling chamber 7, which is filled with

(4) When the gas entering the cooling chamber 7 passes through the coolant 9 filled in the cooling chamber 7, it is cooled by contact heat exchange, and at the same time most of the solid combustion byproducts are captured.

(5) The gas cooled by the coolant 9 to a low temperature and with most of the solids and combustion byproducts captured passes through the coolant spill prevention wire mesh 4a and enters the filter 3.

Most of the solid combustion by-products that could not be captured by the coolant 9 are captured by the filter 3, and are ejected to the outside of the gas generator through the gas nozzle 2 on the 1st circumference side of the casing, and are used as air cushions to protect passengers and water rescue equipment. etc. is inflated.

The same applies to the axially ejected gas generator.

The above-mentioned passenger protection air cushions, water rescue equipment, etc. are usually made of woven fabrics of organic fibers such as nylon, and membranes of organic polymer materials such as rubber and resin, so the gas ejected from the combustion type gas generating agent is The gas must be low enough to not cause thermal damage to organic materials.

However, since combustion type gas generators involve the combustion of a gas generating agent, the gas produced by combustion is extremely hot and contains a large amount of solid combustion byproducts.

Therefore, it is necessary for combustion type gas generators to have a cooling capture function that cools the high-temperature gas and captures solid combustion byproducts.

The coolant 9 and filter 3 provide this cooling capture function to the combustion gas generator.

The coolant 9 is made of granular materials having high thermal conductivity and heat capacity, such as metals such as iron and aluminum, metal oxides such as alumina and magnesia, and other compounds such as charcoal silicon.

The coolant 9 cools the high-temperature gas by heat exchange when the combustion-generated high-temperature gas passes through it, turning it into a low-temperature gas, while at the time of combustion, it is a gas or liquid, and by cooling the combustion by-products, it becomes a solid. Then, this solid combustion sub-precept is attached to the surface and captured.

However, the coolant 9 has extremely good air permeability, and as mentioned above, it only has a simple solid trapping function of attaching solid combustion byproducts to its surface and trapping them. The solids contained within cannot be completely captured.

When the gas generator is used in a vehicle interior where people live, such as a gas generator used in an air cushion for passenger protection, it is desirable to emit as little solid as possible.
Usually metal fibers, ceramic fibers,
Filter 3 made of woven or non-woven fabric such as organic fibers
is provided to capture solids that could not be captured by the coolant 9.

In addition to the granular gas coolant 9 described above, iron,
Stainless steel, copper, or brass wire mesh may be used, but granular gas refrigerants are commonly used.

The reason why granular gas coolants are widely used is that they have the following advantages compared to coolants made of wire mesh made of iron, brass, etc., and are easy to use.

(1) The material itself has a large heat capacity, and since the voids are small, the heat capacity per volume is large.

(2) The gas flow path is complex and the cooling efficiency and solid trapping efficiency are high.

(3) The price is low.

(4) Fewer assembly steps.

Such granular gas coolant 8 is packed as densely as possible in the cooling chamber 7.
It is desirable to fill the

In other words, among the air cushions for passenger protection, the air cushion device installed in the center of the steering wheel for the driver's seat of a car has to be compact in its stored state, and of course the gas generator is also required to be compact. be done.

However, in order to obtain the required amount of gas, the amount of gas generating agent,
In other words, since the volume of the combustion chamber cannot be reduced, the volume of the cooling chamber is inevitably restricted.

Therefore, conventionally, as a method of densely filling the cooling chamber 7 with the coolant 9, excitation, that is, cupping has been performed.

However, conventional gas generators filled with coolant by cupping have the following drawbacks.

(1) Using a transparent container with the same shape as the gas generator, we observed the movement of the coolant during chopping using a high-speed camera.
By tapping, the coolant bounces around and settles in the corners of the container, but it was found that the individual particles of coolant could not be packed very tightly.

In particular, granules used as coolants in combustion gas generators are often used with less sphericity in order to increase the surface area and increase cooling efficiency and solid trapping efficiency. The state is considered to be such that the sharp ends of the granules enter into the very slight acute-angled spaces formed by adjacent granules, and the granules are in close contact with each other as much as possible.

However, when clipping is performed, the granules bounce around, so that at one time the sharp ends of the granules enter the acute-angled spaces formed by adjacent granules, but this state is easily lost again, making it impossible to pack them densely.

Therefore, particulate matter is moved due to large combustion pressure.

Also, the coolant spill prevention wire mesh or its equivalent is compressed and deformed by the combustion pressure, facilitating the movement of particulate matter.

As a result, passages are created between the particulates that allow gas to easily flow out, and a portion of the combustion gas that is high in temperature and has a high solids content during combustion is hardly cooled, and the solids are not captured and ejected. As a result, the overall cooling efficiency and solids trapping efficiency of the coolant decreases,
The temperature of the ejected gas increases and the amount of ejected solids increases.

Furthermore, the relative position of the granular gas coolant fluctuates due to vibrations, shocks, etc., creating voids, making the passage through which gas easily flows out wider, and as a result, cooling efficiency and solid trapping efficiency are further reduced.

In particular, when the number of vibrations increases, the coolant rubs against each other and becomes abraded into powder, further expanding the gap, and as the gap expands, it becomes more susceptible to wear, so the gap expands at an accelerated rate.

As a result, the cooling efficiency is significantly reduced, and the temperature of the ejected gas becomes extremely high, possibly causing the bag to burst.

(2) Differences in the amount of movement of the coolant, that is, the formation of passages through which gas easily escapes, occur due to differences in the tightness of the wire mesh to prevent coolant spillage, the filter and other parts, and the clipping method.
As a result, the cooling efficiency and solid trapping efficiency vary depending on the product, the internal pressure of the bag is not constant, and the occupant restraint performance of the air cushion for protecting the occupant is not stable.

That is, if the air cushion internal pressure is too low, it will not be able to support the occupant moving at high speed, and the occupant will crash into the front of the vehicle.

Furthermore, if the internal pressure of the air cushion is too high, the occupant moving at high speed will be thrown off, causing the occupant to suffer from so-called whiplash.

The present invention relates to a method for filling a coolant in a combustion type gas generator, which improves the conventional method of filling a coolant by cupping and more densely fills the coolant. When filling the cooling chamber with a coolant such as metals, metal oxides such as alumina and magnesia, and other compounds such as silicon carbide, the gas is flowed in the gas generator's gas jet direction or the opposite direction, and the coolant is The second invention is a method of densely filling the coolant with directionality by applying vibration to the coolant, and the second invention is a method of at least performing the work of causing the gas to flow through the coolant and applying vibration, and the work of applying a load. This is a method of filling the coolant more densely by performing the process once at a time.

One embodiment of this invention will be described below with reference to the radial jet type gas generator shown in FIGS. 1 and 2.

(1) Put the coolant 9 into the cooling chamber 7 to a predetermined height.

(2) A cylindrical gas leak prevention plug 16 whose outer diameter is slightly smaller than the inner diameter of the spacer wire mesh 8 is inserted into the combustion chamber 6 to a position slightly lower than the position where the coolant 9 is filled.

(3) At the same time, the outer diameter is the wire mesh 4a for preventing coolant from spilling.
A donut-shaped disk 15 is disposed on the coolant 9, and has an inner diameter slightly larger than the outer diameter of the metal mesh 4b for preventing coolant spillage, and has a hole through which the vibrator 14 can pass. 14 into the coolant 9.

(4) Gas is caused to flow from the igniter mounting hole 11 of the casing 1 in the direction of the arrow in the figure or from the gas nozzle 2 in the direction opposite to the direction of the arrow in the figure, and the vibrator 14 directly vibrates the coolant 9.

(5) Repeat the above operation several times by changing the position of the vibrator 14.

(6) Stop the gas flow, remove the plug 16, the vibrator 14, and the disc 15, and replenish the coolant 9, and perform the steps (4) and (5) above.
Repeat the steps.

(7) Once the coolant 9 has been densely filled to a predetermined height, the disk-shaped lid 10 is welded to the casing 1 all around to seal it.

The same applies to the axial jet type gas generator, which will be explained below based on FIGS. 3 and 4.

(1) Put the coolant 9 into the cooling chamber 27 to a predetermined height.

(2) A disk 35 whose outer diameter is slightly smaller than the inner diameter of the casing 21 and has a large number of small holes and holes through which the vibrator 34 can pass.
is placed on the coolant 9, and the vibrator 34 is inserted into the coolant 9.

(3) From the ignition mounting hole 31 of the casing 21 in the direction of the arrow in the figure or from the opening of the casing 21 to the disc 3
Gas is caused to flow in the direction opposite to the arrow in the figure through the small holes 5, and the coolant 1 is directly vibrated by the vibrator 34.

(4) Repeat the above operation several times by changing the position of the vibrator 34.

(5) Stop the gas flow, remove the vibrator 34 and disk 35, replenish the coolant 9, and repeat the operations (3) and (4) above.

(6) When the coolant 9 is densely filled to a predetermined height, the coolant spill prevention wire mesh 24a and the filter 23 are inserted, and the disk-shaped lid 30 is welded to the casing 21 all around to seal it.

In the above embodiment, the vibrator 14 . vibrates directly vibrating the coolant 9 . 34 is desirably as small as possible so that when the vibrator 14.34 is removed, the gap is small, thereby reducing the movement of the coolant 9.

Further, the vibrations may be applied to the entire casings 1 and 21 without using the vibrators 14 and 34 as in the above embodiment.

Furthermore, instead of filling the cooling chamber with a predetermined amount of coolant little by little by dividing it into several parts as in the above embodiment, the coolant may be filled at once to a predetermined height.

In addition to the above methods, the coolant filling method of the present invention includes the following.

The following will explain the radial ejection type gas generator shown in FIGS. 1 and 2 as an example.

(1) Vibrate the coolant 9 while flowing gas, and then form a cylindrical shape whose outer diameter is slightly smaller than the inner diameter of the coolant spill prevention wire mesh 4a and whose inner diameter is slightly larger than the outer diameter of the coolant spill prevention wire mesh 4b. The pressing die 17 is placed on the coolant 9 and a load is applied using a hydraulic press 18 or the like.

After repeating the above operation several times and filling the coolant to a predetermined height, the lid 10 is welded to the casing 1 all around to seal it.

(2) The work of applying vibration to the coolant 9 while flowing gas and the work of applying a load to the coolant 9 with the press die 17 are performed at the same time.

After repeating this operation several times and filling the coolant to a predetermined height, the cover 10 is welded to the casing 1 all around to seal it.

(3) After filling the coolant 9 to a predetermined height by repeating the process of applying vibration while flowing gas to the coolant 9 several times,
The lid body 10 is placed on the coolant 9, and a press mold 1 is placed on the lid body 10.
A load is applied at step 7, and in that state, the lid body 10 is welded to the casing 1 all around to seal it.

The above method is the same in the case of the axial jetting type gas generator shown in Figs. A cylindrical pressing mold 37 with a slightly smaller outer diameter is loaded with a hydraulic press 38 or the like.

In this case, if the air permeable disk 25 is excessively deformed due to the load, it is preferable to make the holder 40 protrude from the holder 39 of the hydraulic press 37 through the igniter mounting hole 31 to absorb the load.

As described above, in the present invention, the flow rate of gas applied to the coolant varies depending on the vibration acceleration, frequency, and load of the vibrations simultaneously applied, as well as the shape and particle size of the coolant, but a gas flow rate of Il/min or more is appropriate. .

If the gas flow rate is low, the coolant cannot have directionality.

Also, the vibration applied varies depending on the particle size, shape, density of the coolant, size of the cooling chamber, etc., but when applied at the same time as the load, the vibration acceleration is ±0.3 to ±20G1 vibration frequency 10 to 100
0 0Hz, if applied separately from load, vibration acceleration ±5
G or less and a frequency of 5 to 3000 Hz would be good.

Furthermore, the magnitude of the load to be applied varies depending on the strength and shape of the coolant, the thickness of the layer to be filled, the vibration acceleration and frequency of the vibrations applied at the same time, etc., but in a cross section perpendicular to the direction in which the load is applied to the cooling chamber, If applied at the same time as vibration, 0.2~
100kg/Cr? In case of L load, 10 kg/i or more is desirable.

According to the coolant filling method of the present invention as described above, the following effects are achieved.

(1) Since the coolant is filled by applying vibration while flowing the gas in the direction of the combustion gas or the opposite direction, the irregularly shaped coolant is oriented in the direction where the combustion gas or gas flows easily during the vibration. It is changed and filled.

Therefore, the combustion pressure decreases because the combustion products or gases flow easily.
It has become possible to reduce the thickness of the casing, lid, etc., making the gas generator smaller and lighter, and the gas used for the air cushion for protecting the driver's seat, which is stored in a narrow space such as the steering column of a vehicle. Manufacture of the generator becomes easier.

(2) Cooling efficiency and solid trapping efficiency are improved because the combustion gas flow paths are uniformly distributed.

Therefore, the amount of coolant can be reduced, the gas generator is smaller,
Can be made lighter.

(3) By applying vibration to the coolant while flowing gas and further applying a load to the directional coolant, the coolant can be filled more densely.

Therefore, the cooling efficiency and solid trapping efficiency are further improved, and the gas generator can be easily made smaller and lighter.

(4) Wire mesh to prevent coolant from spilling due to product variations;
Even if the filter, casing, etc. are not in close contact with each other before the coolant is filled, the coolant will not move due to combustion pressure because the components will be in close contact with each other when vibration and load are applied to the coolant.

As a result, the cooling efficiency, solid trapping efficiency, and air cushion internal pressure are kept constant, improving the stability of the gas generator.

(5) In addition to being densely filled with coolant, the wire mesh to prevent coolant spillage and the filter are compressed when pressurizing the coolant.
After filling, the repulsive force presses the coolant, so
The relative position of the coolant becomes less likely to fluctuate, and even long-term vibrations do not cause changes in the cooling capacity or solid trapping capacity, and stable operation of the gas generator can be expected.

Experimental example 1 In the radial jet gas generator shown in Figures 1 and 2,
Immediately inside a casing 1 having a large number of gas nozzles 2 on the circumferential side, a filter 3 made of glass fiber or woven cloth and a wire mesh 4a for preventing coolant spillage made of a wire mesh of 40 meshes are placed.

A breathable cylindrical member 5 is disposed in the center of the casing 1,
It is separated into a combustion chamber 6 and a cooling chamber 7.

A wire mesh 4b made of a 40-mesh wire mesh for preventing spillage of coolant is placed on the outside of the breathable cylindrical member 5, and a spacer wire mesh 8 made of a 12-mesh wire mesh is placed on the inside.

Next, the total amount of coolant 9, which is alumina particles with a particle size of about 1, is about 5
00g divided into four equal parts is filled into the cooling chamber 7 and placed on the vibration table 19.

A donut-shaped disk 15 is disposed on top of the alumina grains, and a stopper 16 for preventing gas leakage is inserted into the combustion chamber 6 to a position slightly lower than the height of the coolant 9. While flowing gas at 10 l/min from the casing 1, the vibration acceleration ±201 vibration frequency 1.
Apply vibration at O O Hz for about 30 seconds.

After repeating this operation three times to complete filling with a predetermined amount of coolant 9, the disk 15 and plug 16 are removed, and the lid 10 is welded to the casing 1 all around to seal the cooling chamber 7.

Next, add about 130 g of gas generating agent 12 consisting of sodium azide and potassium perchlorate to the igniter mounting hole 1.
1 was loaded into the combustion chamber 6, and the ignite 13 was attached to manufacture a gas generator.

Experimental Example 2 A radial jet gas generator was manufactured using a method different from Experimental Example 1 only in the following points.

That is, 1 0 67 gas is supplied from the igniter mounting hole 11.
Vibration acceleration ± throughout the casing 1 while pouring min.
The operation of applying a load of 10 kg/1 to the coolant 9 while applying vibrations of 3 G and a frequency of 500 Hz continues for about 30 seconds.

This operation is repeated three times to fill a predetermined amount of coolant.

The rest is exactly the same as Experimental Example 1. Experimental Example 3 In the axial jet gas generator shown in FIGS. 3 and 4, the casing 21 includes a spacer wire mesh 28 made of a 12-mesh wire mesh, a permeable disk 25. A coolant spill prevention wire mesh 24b made of a 40-mesh wire mesh is sequentially inserted to separate the inside of the casing 21 into a combustion chamber 26 and a cooling chamber 27.

Next, a total amount of about 500 g of the coolant 9, which is silicon carbide with a particle size of about 1 mrtt, is divided into four equal parts and filled into the cooling chamber 27.
A disc 35 is arranged on this, and a vibrator 34 with a diameter of about 2 mm
into the coolant 9.

Pour gas from the igniter mounting hole 31 in the direction of the arrow in the figure.
While pouring water at a rate of 0 l/min, the vibrator 34 is subjected to vibration at a vibration acceleration ±IG1 frequency of 300 Hz for about 15 seconds.

This operation is repeated 12 times in total while changing the position of the vibrator 34.

After repeating the above operation three times and filling the predetermined amount of coolant 9, a wire mesh 24a for preventing coolant spillage made of a 40-mesh wire mesh, a filter 2 made of wool felt.
3 and a lid 30 are installed in this order, and the lid 30 is welded to the casing 21 all around to seal the cooling chamber 27.

The rest is exactly the same as Experimental Example 1.

Experimental Example 4 An axial jet gas generator was manufactured using a method different from Experimental Example 3 only in the following points.

That is, the total amount of the coolant 9, which is silicon carbide with a particle size of about 1.
00g divided into four equal parts is filled in the cooling chamber 27, a disc 35 is placed on top of the disc 35, and the vibrator 34 is inserted into the coolant 9.

Next, gas is supplied from the igniter mounting hole 31 at a rate of 10 l/m.
Vibration acceleration ±IG by the vibrator 34 while pouring
Vibration at a frequency of 300 Hz is applied to the coolant 9 for about 15 seconds.

After performing this vibration 12 times in total by changing the position of the vibrator 34,
The vibrator 34 and the disc 35 are removed, and a load of about 100 kg/crj- is applied to the coolant 9 using the press die 37.

The above operations of applying vibration while flowing gas and applying loads are repeated 3 times each to obtain a predetermined amount of coolant 9.
When the filling is completed, the wire mesh 24a1 for preventing coolant spillage, the filter 23, and the lid 30 are installed in this order, and the lid 30 is welded around the entire circumference to the casing 21 with an additional load of about 100 kg/1 applied to the press die 37. do.

The rest is exactly the same as Experimental Example 1.

Comparative Example 1 A gas generator was manufactured using the same construction and materials as in Experimental Example 1, except for the following differences.

That is, about 500 g of alumina grains, which are the same as in Experimental Example 1, are prepared, most of them are placed in the cooling chamber 7 to a predetermined height, the lid is covered with the lid 10, and the cutting is performed.

Next, the lid 10 is removed and a part of the remaining alumina grains is replenished into the part where the alumina grains have settled due to cupping, and then the lid 10 is further covered and cupping is performed.

After repeating this operation four times, all remaining alumina grains are filled and tapped, and the lid body 10 is welded to the casing 1 all around.

The rest is exactly the same as Experimental Example 1.

Comparative Example 2 A gas generator was manufactured using the same structure and materials as in Experimental Example 3, except for the following differences.

That is, about 500 g of the same silicon carbide particles as in Experimental Example 3 are prepared, most of them are put into the cooling chamber 27 up to a predetermined height, and the lid is tapped with a cylinder having a diameter slightly smaller than the inner diameter of the casing 21.

Next, the cylinder is removed and a portion of the remaining silicon carbide grains is replenished into the part where the silicon carbide grains have settled due to the tapping, and then the part is further covered with a cylinder and tapping is performed.

After repeating this operation four times, all the remaining silicon carbide grains are filled, and on top of this, the same coolant spill prevention wire mesh 24a1 as in Experimental Example 3, the filter 23 and the lid 30 are installed in order, and the lid 30 and the casing are 21 is welded all around.

The rest is manufactured in exactly the same manner as in Experimental Example 3.

For each of the gas generators manufactured by the above methods,
The following experiment was conducted and the following points were investigated.

1. Operate each gas generator and check the combustion pressure, ejected gas temperature, and amount of ejected solids.

2. Vibration acceleration ±4G, vibration frequency 151-Iz 3
×106 times, and then disassemble the gas generator to obtain particle size distribution, that is, opening 0. Examine the coolant passing through a 7 1 mm sieve.

3. After the above vibration test, the gas generator is operated, and the combustion pressure, temperature of the ejected gas, and amount of ejected solids are examined.

4. An impact test is performed in which the gas generator is dropped 10 times in succession from a height of 5 m onto a concrete floor, after which the gas generator is disassembled to examine the particle size distribution, that is, the coolant passing through a sieve with an opening of 0.71 mm.

5. After the above impact test, the gas generator is operated, and the combustion pressure, temperature of the ejected gas, and amount of ejected solids are examined.

The results of the above comparative experiments are summarized in the following table.

As is clear from the table above, in Comparative Examples 1 and 2 using the conventional coolant filling method, the performance of the gas generator after vibration and impact tests deteriorated, whereas the gas generator produced using the coolant filling method of the present invention deteriorated. The gas generator tested showed no deterioration in performance even after vibration and impact tests, and the gas was extremely low temperature and clean even before the test.

[Brief explanation of the drawing]

1 and 2 are explanatory sectional views of a radial ejection type gas generator, and FIGS. 3 and 4 are explanatory sectional views of an axial ejection type gas generator. 1, 21... Casing, 2, 22...
・Gas nozzle, 3, 23...Filter, 4a,
4b, 24a, 24b...Wire mesh for preventing coolant from collapsing, 5...Breathable cylindrical member, 6, 26...
... Combustion chamber, 7, 27 ... Cooling chamber, 8, 28
...Spacer wire mesh, 9... Coolant,
10.30... Lid body, 11.31...
Igniter mounting hole, 12...Gas generating agent, 1
3...Ignike, 14.34...Vibrator, 15,35...Disc, 16...
Plug, 17.37...Press type, 18.38...
... Hydraulic press, 19.39 ... Vibration table, 2
5... Breathable disc, 40... Receiver.

Claims (1)

[Scope of Claims] 1. In the coolant filling process of a gas generator in which a cooling chamber is provided between a casing having a gas nozzle and a combustion chamber in which a combustion type gas generating agent is loaded, the cooling chamber is filled with a coolant. 1. A method of filling a coolant in a gas generator, which comprises: introducing a coolant into the coolant, causing gas to flow through the coolant in the gas ejection direction of the gas generator or in the opposite direction, and applying vibration to the coolant. 2. In the coolant filling process of a gas generator in which a cooling chamber for filling a coolant is provided between a casing having a gas nozzle and a combustion chamber in which a combustion type gas generating agent is loaded, the coolant is charged into the cooling chamber. , a method of controlling a coolant in a gas generator, characterized in that an operation of causing gas to flow through the coolant in the gas ejection direction of the gas generator or in the opposite direction thereof and applying vibration, and an operation of applying a load are performed at least once each. Filling method.