阅读说明：本技术 喷雾气雾剂点火距离及回火特性的测试装置和方法 (Device and method for testing ignition distance and tempering characteristic of spray aerosol ) 是由 张金梅 陈金合 王亚琴 高月 张向倩 厉鹏 吴保意 于 2020-05-28 设计创作，主要内容包括：本发明公开了一种喷雾气雾剂点火距离及回火特性的测试装置和方法,包括：固定部件,用于固定气雾剂容器位置；触控按压器,通过遥控器来开启或关闭喷嘴上的阀门；燃烧器,燃烧喷出的气雾剂；第一支撑框架、第二支撑框架,均用于固定安装粗棉布。本发明的有益效果是,测试装置取材易得,结构设计合理,采用第一支撑框架、第二支撑框架上固定的粗棉布是否点燃来判断气雾剂是否燃烧或者点火距离的大小,试验现象更加直观,试验结果更准确,对一些燃烧性较差的气雾剂,可避免终点值误判的问题；易燃气雾剂测试风险较高,采用遥控启动控制气雾剂的排放,提高测试过程的安全性。(The invention discloses a device and a method for testing ignition distance and tempering characteristic of a spray aerosol, comprising the following steps: a fixing member for fixing the position of the aerosol container; the touch control pressing device opens or closes a valve on the nozzle through a remote controller; a burner that burns the ejected aerosol; first braced frame, second braced frame all are used for fixed mounting coarse cotton. The invention has the advantages that the testing device is easy to obtain materials, the structural design is reasonable, whether the aerosol burns or the ignition distance is judged by adopting whether the cheesecloth fixed on the first supporting frame and the second supporting frame is ignited, the testing phenomenon is more visual, the testing result is more accurate, and the problem of misjudgment of the end point value can be avoided for some aerosols with poor combustibility; the flammable aerosol test risk is higher, adopts the remote control to start the emission of control aerosol, improves the security of test process.)

1. Testing arrangement of spraying aerosol ignition distance and tempering characteristic, its characterized in that includes:

a fixing member for fixing the position of the aerosol container;

the touch control pressing device opens or closes a valve on the nozzle through a remote controller;

a burner that burns the ejected aerosol;

first braced frame, second braced frame all are used for fixed mounting coarse cotton.

2. The apparatus for testing ignition distance and flashback characteristic of aerosol spray according to claim 1, wherein the fixing member is fixedly disposed on the test stand, the aerosol container is placed in a fixing hole in the fixing member, and the aerosol container sprays the aerosol inside in a horizontal direction.

3. The device for testing ignition distance and backfire characteristics of aerosol as claimed in claim 1, wherein said touch-operated pressing device is connected to the nozzle of the aerosol container, and the remote controller remotely controls the operation of the touch-operated pressing device to open or close the valve on the nozzle.

4. The aerosol ignition distance and backfire characteristics testing device according to claim 1, wherein said burner is vertically fixed on a test stand between the aerosol container and the first supporting frame, and the horizontal distance between the nozzle hole of the burner and the nozzle of the aerosol container is 10-20 cm.

5. The device for testing the ignition distance and the backfire characteristic of a spray aerosol as claimed in claim 1, wherein the first support frame and the second support frame are adjustable in height and are fixedly mounted on the test bed toward the burner, and the horizontal distance between the first support frame and the burner is 10-30 cm and the horizontal distance between the second support frame and the burner is 90-120 cm.

6. The device for testing ignition distance and tempering property of spray aerosol according to claim 1, wherein the first support frame and the second support frame are respectively fixedly provided with cheesecloth, and the mass per unit area of the cheesecloth ranges from (35-65) g/m²。

7. The device for testing the ignition distance and the tempering property of the spray aerosol according to claim 1, wherein the first support frame and the second support frame are made of metal or other non-flammable materials, and space fixing cheesecloth with the length of 20-50 cm and the width of 40-60 cm is reserved respectively.

8. The device for testing the ignition distance and the tempering characteristic of the spray aerosol as claimed in claim 1, wherein the burner is supplied with fuel through a gas supply cylinder connected with the burner, so that the height of the combustion flame of the burner is ensured to be 3-10 cm.

9. A method for testing the ignition distance and the tempering characteristic of a spray aerosol by using the testing device according to any one of claims 1 to 8, which is characterized by comprising the following steps:

(1) adjusting the test environment temperature to 22 +/-2 ℃, ensuring no obvious air flow, and keeping the aerosol to be tested at the environment temperature for at least 4 hours;

(2) installing a testing device, and before testing, after the aerosol container is discharged for 5-10 seconds, fixing the aerosol container in a fixed part, and ensuring that the vertical distance between the horizontal center position of the aerosol sprayed out of a nozzle and a spray hole is 3-10 cm, and the transverse distance is 10-20 cm;

(3) adjusting the flame height of the burner to be 3-10 cm, and controlling the discharge of the aerosol container to perform a primary test;

(4) fixing the coarse cotton cloth on the reserved spaces of the first supporting frame and the second supporting frame by using a clamp to ensure whether the horizontal distance between the coarse cotton cloth and the jet holes is proper or not;

(5) firstly, adjusting the height of a first supporting frame to enable the coarse cotton cloth to intercept the flame spraying rays of the aerosol;

(6) if the aerosol container needs to be shaken, forcefully shaking for 5-10 seconds, then placing the aerosol container in a fixed hole, and after the shaking is stopped for 15 seconds, controlling a touch control presser to press a valve on a nozzle by a remote controller so as to continuously discharge the aerosol for at least 60 seconds; if the aerosol container does not need to shake, the remote controller controls the touch pressing device to press the valve on the nozzle, so that the aerosol is continuously discharged for at least 60 seconds;

(7) for pressurized aerosol containers, last 5 seconds or until the dry scrim ignites; for spray pump aerosol containers, at least three aerosols were used for the test or until the cheesecloth ignited;

(8) if the cheesecloth on the first support frame is ignited, continuing the test with the cheesecloth on the second support frame according to the above steps;

(9) after each aerosol discharge, the test area must be cleared of all fumes and residue.

10. The aerosol spray ignition distance and flashback behavior testing method of claim 9, wherein in step (2), the first support frame and the second support frame are fixed to the test bed, respectively, and a gap of at least 50cm is reserved outside the second support frame when the testing device is installed.

11. The method for testing ignition distance and backfire characteristics of spray aerosol as claimed in claim 9, wherein in step (3), if no flame jet is generated, the position of the nozzle of the burner is lowered by 5-10 cm, and the burner is adjusted so that the height of the flame is 10-15 cm.

12. A method of testing the ignition distance and flashback characteristic of a spray aerosol as claimed in claim 9, wherein the test results are classified into four cases:

(1) if during the test the injected flame is flashback from the burner, a flashback is occurring.

(2) If during the test the cheesecloth on the first support frame is not lit but there is a flame jet, the ignition distance is less than 15 cm;

(3) if during the test the cheesecloth on the first support frame is lit and the cheesecloth on the second support frame is not lit all the time, the flame throw length ranges from 15cm to 100cm, i.e. the ignition distance is from 15cm to 100 cm;

(4) if the cheesecloth on the second support frame is ignited during the test, the flame throw length is 100cm or more, i.e., the ignition distance is 100cm or more.

13. A method of testing the ignition distance and flashback behavior of a spray aerosol as claimed in claim 9, wherein the results of the test are classified into the following three cases:

(1) the ignition distance is less than 15cm, and no backfire occurs, so that the aerosol is non-flammable.

(2) When the ignition distance is more than 15cm and less than 100cm, and no tempering occurs, the fuel is flammable aerosol;

(3) when the ignition distance is more than or equal to 100cm or tempering occurs, the fuel gas is extremely easy to burn and atomize.

Technical Field

The invention relates to the technical field of aerosol combustion performance testing, in particular to a device and a method for testing ignition distance and tempering characteristics of a spray aerosol.

Background

The aerosol is one of GHS physical danger categories, such as human life, closely related aerosol insecticide, air freshener and the like, and because the aerosol products mostly adopt hydrocarbons as propellants and are stored under pressure, the products are flammable and explosive, which is the main danger of the products. When the aerosol leaks, the combustible aerosol components diffuse into the air, and the explosion accident can occur when the aerosol meets open fire. Fire explosions may also propagate and propagate along the aerosol diffusion path. The flammability of aerosol is mainly caused by the propellant contained in the aerosol, and the different propellants cause the flammability of aerosol to be different, and the aerosol is classified into a category 1 (extremely flammable), a category 2 (flammable) and a category 3 (non-flammable) according to the difference of flammability.

The ignition distance is an important evaluation parameter of the combustibility of the spray aerosol, and some ignition distance test devices for aerosol have been disclosed, for example, the Chinese patent CN101788550B discloses an aerosol spray ignition distance test device, the CN106383197B discloses a spray aerosol ignition distance tester, the CN201340414Y discloses a spray aerosol ignition distance tester, the CN206450645U discloses a spray aerosol ignition distance tester, the above invention patent or utility model is designed according to the ignition distance test standard in the recommendation-test and standard manual about dangerous goods transportation, judging the ignition distance by judging whether the content of the aerosol is combusted under the condition of an ignition source, observing whether the content of the aerosol is ignited without a reference background, for the aerosol with poor combustion performance, the combustion phenomenon is not obvious, and misjudgment is easy to occur by visual observation. Meanwhile, in the ignition distance testing process, the jet flame generated by the combustion of the aerosol content can be tempered, and the device can only test the ignition distance and cannot test the tempering characteristic of the aerosol.

Therefore, it is required to develop a test apparatus for testing the flammability of the aerosol spray, which is more intuitive in test phenomenon and can comprehensively test the ignition distance and the tempering property.

Disclosure of Invention

The invention discloses a device and a method for testing ignition distance and tempering characteristic of spray aerosol, aiming at solving the technical problem that the test of the ignition distance and the tempering characteristic of the aerosol is incomplete.

In order to achieve the purpose, the invention adopts the following technical scheme:

testing arrangement of spraying aerosol ignition distance and tempering characteristic, its characterized in that includes:

a fixing member for fixing the position of the aerosol container;

the touch control pressing device opens or closes a valve on the nozzle through a remote controller;

a burner that burns the ejected aerosol;

and the first supporting frame or the second supporting frame is used for fixedly mounting the coarse cotton cloth.

Preferably, the fixing member is fixedly provided on the test stand, the aerosol container is placed in a fixing hole in the fixing member, and the aerosol container sprays the aerosol inside in a horizontal direction.

Preferably, the touch depressor is connected with the nozzle of the aerosol container, and the remote controller remotely controls the touch depressor to act to open or close the valve on the nozzle.

Preferably, the burner is vertically fixed on the test bed and positioned between the aerosol container and the first support frame, and the horizontal distance between the spray hole of the burner and the nozzle of the aerosol container is 10-20 cm.

Preferably, the heights of the first supporting frame and the second supporting frame are adjustable and are fixedly mounted on the test bed towards the combustor, the horizontal distance between the first supporting frame and the combustor is 10-30 cm, and the horizontal distance between the second supporting frame and the combustor is 90-120 cm.

Preferably, the first supporting frame and the second supporting frame are respectively and fixedly provided with coarse cotton cloth, and the mass range of the coarse cotton cloth per unit area is (35-65) g/m²。

Preferably, the first supporting frame and the second supporting frame are made of metal or other non-combustible materials, and space fixing coarse cotton cloth with the length of 20-50 cm and the width of 40-60 cm is reserved respectively.

Preferably, the burner supplies fuel through an air supply cylinder connected with the burner, and the height of the burning flame of the burner is ensured to be 3-10 cm.

The invention also aims to disclose a method for testing the ignition distance and the tempering characteristic of the spray aerosol, which adopts the testing device and specifically comprises the following steps:

(1) adjusting the test environment temperature to 22 +/-2 ℃, ensuring no obvious air flow, and keeping the aerosol to be tested at the environment temperature for at least 4 hours;

(2) installing a testing device, and before testing, after the aerosol container is discharged for 5-10 seconds, fixing the aerosol container in a fixed part, and ensuring that the vertical distance between the horizontal center position of the aerosol sprayed out of a nozzle and a spray hole is 3-10 cm, and the transverse distance is 10-20 cm;

(3) adjusting the flame height of the burner to be 3-10 cm, and controlling the discharge of the aerosol container to perform a primary test;

(4) fixing the coarse cotton cloth on the reserved spaces of the first supporting frame and the second supporting frame by using a clamp to ensure whether the horizontal distance between the coarse cotton cloth and the jet holes is proper or not;

(5) firstly, adjusting the height of a first supporting frame to enable the coarse cotton cloth to intercept the flame spraying rays of the aerosol;

(6) if the aerosol container needs to be shaken, forcefully shaking for 5-10 seconds, then placing the aerosol container in a fixed hole, and after the shaking is stopped for 15 seconds, controlling a touch control presser to press a valve on a nozzle by a remote controller so as to continuously discharge the aerosol for at least 60 seconds; if the aerosol container does not need to shake, the remote controller controls the touch pressing device to press the valve on the nozzle, so that the aerosol is continuously discharged for at least 60 seconds;

(7) for pressurized aerosol containers, last 5 seconds or until the dry scrim ignites; for spray pump aerosol containers, at least three aerosols were used for the test or until the cheesecloth ignited;

(8) if the cheesecloth on the first support frame is ignited, continuing the test with the cheesecloth on the second support frame according to the above steps;

(9) after each aerosol discharge, the test area must be cleared of all fumes and residue.

Preferably, in the step (2), when the testing device is installed, the first supporting frame and the second supporting frame are respectively fixed on the test bed, and a gap of at least 50cm is reserved on the outer side of the second supporting frame.

Preferably, in the step (3), if no flame jet is generated, the position of the spray hole of the burner is lowered by 5-10 cm, and the burner is adjusted to enable the height of the flame to be 10-15 cm.

Preferably, the results of the test method fall into the following four cases:

(1) if during the test the injected flame is flashback from the burner, a flashback is occurring.

(2) If during the test the cheesecloth on the first support frame is not lit but there is a flame jet, the ignition distance is less than 15 cm;

(3) if during the test the cheesecloth on the first support frame is lit and the cheesecloth on the second support frame is not lit all the time, the flame throw length ranges from 15cm to 100cm, i.e. the ignition distance is from 15cm to 100 cm;

(4) if the cheesecloth on the second support frame is ignited during the test, the flame throw length is 100cm or more, i.e., the ignition distance is 100cm or more.

Preferably, the result of the test method is judged in the following three cases:

the result judgment of the test method is divided into the following three conditions:

(1) the ignition distance is less than 15cm, and no backfire occurs, so that the aerosol is non-flammable.

(2) When the ignition distance is more than 15cm and less than 100cm, and no tempering occurs, the fuel is flammable aerosol;

(3) when the ignition distance is more than or equal to 100cm or tempering occurs, the fuel gas is extremely easy to burn and atomize.

The invention has the advantages that the testing device is easy to obtain materials, the structural design is reasonable, whether the aerosol burns or the ignition distance is judged by adopting whether the cheesecloth fixed on the first supporting frame and the second supporting frame is ignited, the test phenomenon is more intuitive, and the problem of misjudgment of the end point value can be avoided for some aerosols with poor combustibility; in addition, the flammable aerosol test risk is higher, and the remote control starting is adopted to control the emission of the aerosol, so that the safety of the test process is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic representation of the structure of the cheesecloth used in the present invention;

wherein, 1-a stationary part; 2-test bed; 3-a remote controller; 4-touch depressor; 5-a burner; 6-a first support frame; 7-a second support; 8-a nozzle; 9-a gas supply cylinder; 10-coarse cotton cloth; 11-aerosol container.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in the figure, the device for testing the ignition distance and the tempering characteristic of the spray aerosol comprises: an aerosol container for spraying an aerosol to be tested; a fixing member for fixing the position of the aerosol container; the touch control pressing device opens or closes a valve on the nozzle through a remote controller; a burner that burns the ejected aerosol; first braced frame, second braced frame all are used for fixed mounting coarse cotton.

Particularly, the heights of the first supporting frame and the second supporting frame are adjustable, the first supporting frame and the second supporting frame are fixedly arranged on the test bed towards the combustor, the horizontal distance between the first supporting frame and the combustor is 15cm, and the horizontal distance between the second supporting frame and the combustor is 100 cm.

Particularly, the first supporting frame and the second supporting frame are respectively and fixedly provided with coarse cotton cloth, and the mass range of the coarse cotton cloth per unit area is (35-65) g/m²。

Particularly, the first supporting frame and the second supporting frame are made of metal or other non-combustible materials, and space fixing coarse cotton cloth with the length of 35cm and the width of 45cm is reserved respectively.

In particular, the burner is supplied with fuel through a gas supply cylinder connected with the burner, and the height of a combustion flame of the burner is ensured to be 5 cm.

Test object of this example: flammability of certain moisturizing spray aerosols

A method for testing ignition distance and tempering characteristics of a spray aerosol specifically comprises the following steps:

(1) adjusting the test environment temperature to 22 +/-2 ℃, ensuring no obvious air flow, and keeping the aerosol to be tested at the environment temperature for at least 4 hours; and fixing the first support frame on the test bed.

(2) Before testing, the aerosol container for moisturizing spray was discharged for 5 seconds and then fixed in the fixed hole, and the vertical distance between the horizontal center position of the aerosol sprayed from the nozzle and the spray hole was 5cm, the lateral distance was 15cm, and the nozzle was directed to the burner.

(3) Adjusting the flame height of the burner to 5cm, and controlling the discharge of the aerosol container to perform a primary test; the moisture-preserving spray aerosol generates flame spray, and the flame height of a burner does not need to be adjusted.

(4) Fixing the coarse cotton cloth on a reserved space on the first supporting frame by using a clamp to ensure whether the horizontal distance between the coarse cotton cloth and the jet hole is proper or not;

(5) the height of the first support frame is adjusted so that the cheesecloth can intercept the aerosol flame rays.

(6) The requirement of shaking is not described in the specification of the moisturizing spray aerosol, and the remote controller controls the touch-control pressing device to press the valve on the nozzle to continuously discharge the aerosol for at least 60 seconds.

(7) The moisturizing spray aerosol was discharged for 5 s.

(7) The cheesecloth on the first support frame was tested and tempering occurred and the test was stopped.

(8) After each aerosol discharge, the test area must be cleared of all fumes and residue.

And (4) judging a result:

when the test was carried out using the first support frame installed at a distance of 15cm from the burner, backfire occurred, and the spray aerosol was judged to be extremely flammable.

Example 2

As shown in the figure, the device for testing the ignition distance and the tempering characteristic of the spray aerosol comprises: an aerosol container for spraying an aerosol to be tested; a fixing member for fixing the position of the aerosol container; the touch control pressing device opens or closes a valve on the nozzle through a remote controller; a burner that burns the ejected aerosol; first braced frame, second braced frame all are used for fixed mounting coarse cotton.

Particularly, the heights of the first supporting frame and the second supporting frame are adjustable, the first supporting frame and the second supporting frame are fixedly arranged on the test bed towards the combustor, the horizontal distance between the first supporting frame and the combustor is 15cm, and the horizontal distance between the second supporting frame and the combustor is 100 cm.

Particularly, the first supporting frame and the second supporting frame are respectively and fixedly provided with coarse cotton cloth, and the mass range of the coarse cotton cloth per unit area is (35-65) g/m²。

Particularly, the first supporting frame and the second supporting frame are made of metal or other non-combustible materials, and space fixing coarse cotton cloth with the length of 35cm and the width of 45cm is reserved respectively.

In particular, the burner is supplied with fuel through a gas supply cylinder connected with the burner, and the height of a combustion flame of the burner is ensured to be 5 cm.

Test object of this example: flammability of certain insecticidal aerosols

A method for testing ignition distance and tempering characteristics of a spray aerosol specifically comprises the following steps:

(1) adjusting the test environment temperature to 22 +/-2 ℃, ensuring no obvious air flow, and keeping the aerosol to be tested at the environment temperature for at least 4 hours; and fixing the first support frame on the test bed.

(2) Mounting a testing device, before testing, discharging the aerosol container for 5 seconds, fixing the aerosol container in a fixed part, and ensuring that the vertical distance between the horizontal center position of the aerosol sprayed out of a nozzle and a spray hole is 5cm, the transverse distance is 15cm, and the nozzle points to a combustor;

(3) adjusting the flame height of the burner to 5cm, and controlling the discharge of the aerosol container to perform a primary test; the aerosol insecticide generates a flame spray without the need to readjust burner orifice height.

(4) Fixing the coarse cotton cloth on a reserved space of the first supporting frame by using a clamp to ensure whether the horizontal distance between the coarse cotton cloth and the jet hole is proper or not;

(5) adjusting the height of the first support frame so that the cheesecloth can intercept the aerosol flame spray rays;

(6) the specification of the insecticidal aerosol requires shaking, the container is placed in a fixed hole after being shaken for 5 seconds, and after the shaking is stopped for 15 seconds, the remote controller controls the touch control pressing device to press a valve on a nozzle, so that the aerosol is continuously discharged for at least 60 seconds;

(7) the insecticide is pressurized for 5 seconds or until the dry scrim is ignited;

(8) igniting the cheesecloth on the first support frame;

(9) continuing the test using the cheesecloth mounted on the second support frame, the cheesecloth on the second support frame being lit without tempering during the test;

(10) after each aerosol discharge, the test area must be cleared of all fumes and residue.

And (4) judging a result:

the ignition of the cheesecloth on the second support frame indicates a flame projected length of 100cm or more, indicating that the ignition distance of the insecticidal aerosol is more than 100cm, and the aerosol is judged to be extremely flammable.

Example 3

As shown in the figure, the device for testing the ignition distance and the tempering characteristic of the spray aerosol comprises: an aerosol container for spraying an aerosol to be tested; a fixing member for fixing the position of the aerosol container; the touch control pressing device opens or closes a valve on the nozzle through a remote controller; a burner that burns the ejected aerosol; first braced frame, second braced frame all are used for fixed mounting coarse cotton.

Particularly, the heights of the first supporting frame and the second supporting frame are adjustable, the first supporting frame and the second supporting frame are fixedly arranged on the test bed towards the combustor, the horizontal distance between the first supporting frame and the combustor is 15cm, and the horizontal distance between the second supporting frame and the combustor is 100 cm.

Particularly, the first supporting frame and the second supporting frame are respectively and fixedly provided with coarse cotton cloth, and the mass range of the coarse cotton cloth per unit area is (35-65) g/m²。

Particularly, the first supporting frame and the second supporting frame are made of metal or other non-combustible materials, and space fixing coarse cotton cloth with the length of 35cm and the width of 45cm is reserved respectively.

In particular, the burner is supplied with fuel through a gas supply cylinder connected with the burner, and the height of a combustion flame of the burner is ensured to be 5 cm.

Test object of this example: flammability of certain air fresheners

A method for testing ignition distance and tempering characteristics of a spray aerosol specifically comprises the following steps:

(1) adjusting the test environment temperature to 22 +/-2 ℃, ensuring no obvious air flow, and keeping the aerosol to be tested at the environment temperature for at least 4 hours; and fixing the first support frame on the test bed.

(2) Mounting a testing device, before testing, discharging the aerosol container for 5 seconds, fixing the aerosol container in a fixed part, and ensuring that the vertical distance between the horizontal center position of the aerosol sprayed out of a nozzle and a spray hole is 5cm, the transverse distance is 15cm, and the nozzle points to a combustor;

(3) adjusting the flame height of a burner to be 5cm, and controlling the discharge of an air freshener aerosol container to perform a preliminary test; the aerosol insecticide generates a flame spray without the need to readjust burner orifice height.

(4) Fixing the coarse cotton cloth on a reserved space of the first supporting frame by using a clamp to ensure whether the horizontal distance between the coarse cotton cloth and the jet hole is proper or not;

(5) adjusting the height of the first support frame so that the cheesecloth can intercept the aerosol flame spray rays;

(6) the specification of the air freshener requires shaking, the aerosol container is placed in a fixed hole after the air freshener is vigorously shaken for 5 seconds, and after the shaking is stopped for 15 seconds, the remote controller controls the touch control pressing device to press a valve on a nozzle, so that the aerosol of the air freshener is continuously discharged for at least 60 seconds;

(7) the air freshener is pressurized and lasts for 5 seconds or until the dry coarse cloth is ignited;

(8) igniting the cheesecloth on the first support frame;

(9) continuing the test using the cheesecloth mounted on the second support frame, the cheesecloth on the second support frame not being lit, according to the above steps;

(10) after each aerosol discharge, the test area must be cleared of all fumes and residue.

And (4) judging a result:

the ignition distance is more than 15cm and less than 100cm, and the aerosol is flammable.

It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.