Device for demonstrating fire extinguishing process of microcapsule fire extinguishing agent in narrow space

Abstract

The invention discloses a narrow space microcapsule fire extinguishing agent fire extinguishing process demonstration device, which comprises a combustion device, a ventilation device, a placement device, a wire passing device and a data acquisition system, and is characterized in that the combustion device is used for simulating a narrow space, a fire source is arranged in the middle of the combustion device, and an experimental environment capable of isolating an external environment is provided; the ventilation device is used for providing gas required by combustion in the experiment process; the placing device is used for placing a microcapsule fire extinguishing agent required by combustion in an experiment process; the wire passing device is used for introducing an instrument probe required in the experiment process; and the data acquisition system is used for acquiring experimental data in an experimental process. The device can simulate fire scenes in narrow and small spaces under various typical conditions and different types of fire scenes. Through systematic experiments, fire extinguishing effects under different conditions are evaluated, optimal release parameters suitable for different fire extinguishing application scenes are established, the purpose of preventing or inhibiting initial fire disasters is achieved, and the method has a wide application range.

Description

Technical Field

[0001] This application relates to the technical field of microcapsule fire extinguishing agents, and particularly to a demonstration device for the fire extinguishing process of microcapsule fire extinguishing agents in confined spaces. Background Art

[0002] Microcapsule fire extinguishing agents are a new type of fire extinguishing technology. The principle is to encapsulate the fire extinguishing agent in microcapsules. When a fire occurs, the microcapsules rupture at high temperatures, releasing the fire extinguishing agent to inhibit the spread of the fire. When a fire occurs in a confined space, due to poor air circulation and strong concealment, it is not easily detected in the early stage, and traditional fire detection, fire extinguishing and other prevention and control measures have limited effects and cannot achieve very early fire prevention and control. Therefore, the development of this experimental platform is of crucial significance for in-depth research on the fire extinguishing process of microcapsule fire extinguishing agents in confined spaces and effectively reducing fire risks. The following are the deficiencies of the existing technology in this field: 1. It is not a confined space and cannot make up for the deficiencies of fire protection facilities in the field of confined and enclosed spaces in the market. 2. It cannot simulate the fire scenarios in confined spaces under various typical conditions and different types of fire scenarios.

[0003] Therefore, we propose a demonstration device for the fire extinguishing process of microcapsule fire extinguishing agents in confined spaces to solve the above problems. Summary of the Invention

[0004] The purpose of this application is to simulate the fire scenarios in confined spaces under various typical conditions and different types of fire scenarios in view of the deficiencies of the existing technology. Evaluate the fire extinguishing experimental process of microcapsule fire extinguishing agents under different conditions.

[0005] This application provides a demonstration device for the fire extinguishing process of microcapsule fire extinguishing agents in confined spaces, including: a combustion device, a ventilation device, a placement device, a wire passing device, and a data acquisition system.

[0006] The combustion device is used to simulate a confined space, with a fire source in the middle, and the outer shell is made of fireproof glass with a certain thickness to provide the experimental environment for the fire extinguishing of microcapsule fire extinguishing agents in the confined space that can isolate the external environment;

[0007] The ventilation device is used to provide the gas required for combustion during the fire extinguishing experiment of microcapsule fire extinguishing agents in the confined space;

[0008] The placement device is used to place the microcapsule fire extinguishing agent required for combustion during the fire extinguishing experiment of microcapsule fire extinguishing agents in the confined space;

[0009] The wire passing device is used to introduce the instrument probes required during the fire extinguishing experiment of microcapsule fire extinguishing agents in the confined space;

[0010] The data acquisition system is used to acquire the experimental data during the fire extinguishing experiment of the microcapsule fire extinguishing agent in the narrow space.

[0011] The combustion device (1) includes an upper combustion device (11) and a lower combustion device (12). Both the upper combustion device (11) and the lower combustion device (12) are composed of four transparent heat-resistant side plates. At the central positions on the four sides of the bottom of the upper combustion device (11), a convex structure (111) is provided at each position. At the central positions on the four sides of the top of the lower combustion device (12), a groove structure (121) is provided at each position. The heights of the four groups of convex structures (111) are the same as the depths of the four groups of groove structures (121). The four groups of convex structures (111) and the corresponding four groups of groove structures (121) are closely fitted at their joint parts, achieving seamless splicing. The height of the combustion device (1) can be adjusted by adjusting the height of the lower combustion device (12) with a similar structure to the lower combustion device (12).

[0012] The ventilation device (2) has an air inlet cylinder (21). The air inlet cylinder (21) is arranged horizontally on the outer wall surface of the right side of the upper combustion device (11). At the connection position between the ventilation device (2) and the upper combustion device (11), a wind tunnel plate (22) is provided. The wind tunnel plate (22) is located at a position slightly above the right side wall surface of the upper combustion device (11). Inside the ventilation device (2), a rotating blade (23) that helps promote gas flow is equipped.

[0013] The placement device (3) includes the wire mesh (31), the patch (32), and the microcapsule fire extinguishing agent (33). The size of the patch (32) is the same as the size of the wire mesh (31), and both are slightly larger than the length and width of the combustion device (1). The upper surface of the patch (32) is attached to the lower surface of the wire mesh (31). The microcapsule fire extinguishing agent (33) is adhered to the lower surface of the patch (32). The microcapsule fire extinguishing agent (33) is arranged at the central position of the patch (32). The placement device (3) is arranged on the top of the upper combustion device (11).

[0014] The wire passing device (4) includes an upper wire passing device (41) and a lower wire passing device (42). Both the upper wire passing device (41) and the lower wire passing device (42) are arranged horizontally on the outer wall surface of the left side of the upper combustion device (11). The upper wire passing device (41) is located at the uppermost position of the left side wall surface of the upper combustion device (11). The lower wire passing device (42) is located at the central position of the left side wall surface of the upper combustion device (11). The upper wire passing device (41) is installed directly above the lower wire passing device (42).

[0015] Optionally, the data acquisition system (5) includes a temperature measurement system (51), a gas measurement system (52), a camera system (53), a weighing system (54), and a timing system (55).

[0016] The temperature measurement system (51) includes a thermocouple data collector (511), a thermocouple 1 (512), and a thermocouple 2 (513); the thermocouple 1 (512) passes through the upper wire passing device (41) to measure the temperature change on the surface of the microcapsule fire extinguishing agent (33), and the thermocouple 2 (513) passes through the lower wire passing device (42) and extends to the bottom of the combustion device (1) to measure the ambient temperature change in the combustion device (1) during the fire extinguishing experiment of the microcapsule fire extinguishing agent in a narrow space.

[0017] The gas measurement system (52) uses a high-precision gas concentration analyzer (521), and the high-precision gas concentration analyzer (521) passes through the lower wire passing device (42) and extends to the bottom of the combustion device (1) to measure the gas concentration change in the combustion device (1) during the fire extinguishing experiment of the microcapsule fire extinguishing agent in a narrow space.

[0018] The camera system (53) includes a high-speed camera (531) and a schlieren apparatus (532); the high-speed camera (531) is used to monitor in real time the rupture process of the fire extinguishing agent in a high-temperature environment during the fire extinguishing experiment of the microcapsule fire extinguishing agent in a narrow space and capture the instantaneous changes of the fire extinguishing agent; the schlieren apparatus (532) is used to observe and study the gas distribution during the fire extinguishing experiment of the microcapsule fire extinguishing agent in a narrow space.

[0019] The weighing system (54) includes an electronic balance (541) with a precision of 0.001 g. The electronic balance (541) is placed under the combustion device (1), and the electronic balance (541) is used to record in real time the mass change of the experimental sample during the fire extinguishing experiment of the microcapsule fire extinguishing agent in a narrow space.

[0020] The timing system (55) refers to a high-precision electronic timer (551), and the electronic timer (551) is used to accurately measure the fire extinguishing time of the fire source during the fire extinguishing experiment of the microcapsule fire extinguishing agent in a narrow space.

[0021] The fire source is a candle (6) with a certain specification, and the flame of the burning candle is used as the fire source for the fire extinguishing experiment of the microcapsule fire extinguishing agent in a narrow space.

[0022] Thus, the present application has the following beneficial effects:

[0023] In this application, the placement device is arranged on the top of the combustion device, and the microcapsule fire extinguishing agent is attached to the silicone patch. At the same time, a high-speed camera and a schlieren instrument are set up outside the combustion device. Through the thermocouple, high-precision gas concentration analyzer, high-speed camera and schlieren instrument, this application can demonstrate and analyze the fire extinguishing process of the microcapsule fire extinguishing agent in a narrow space during the experiment, which has strong practicability.

[0024] In the lower-layer combustion device of this application, distance adjustment can be carried out. Different fire extinguishing scenarios can be provided by changing the height of the lower-layer combustion device and the parameters of the microcapsule fire extinguishing agent according to the experimental needs, and the fire scenarios in narrow spaces and different types of fire scenarios under various typical conditions can be analyzed, which has a wide range of applications. Description of the Drawings

[0025] Figure 1 is the overall side view of a demonstration device for the fire extinguishing process of a microcapsule fire extinguishing agent in a narrow space in an embodiment of this application;

[0026] Figure 2 is the combustion device of a demonstration device for the fire extinguishing process of a microcapsule fire extinguishing agent in a narrow space in an embodiment of this application;

[0027] Figure 3 is the bottom view of the placement device of a demonstration device for the fire extinguishing process of a microcapsule fire extinguishing agent in a narrow space in an embodiment of this application. Detailed Description of the Invention

[0028] The following further describes this application in detail with reference to the drawings and specific preferred embodiments.

[0029] In the description of this application, it should be understood that the orientation or positional relationship indicated by terms such as "left side", "right side", "upper side", "lower side", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application. The specific dimensions adopted in this embodiment are only for illustrating the technical solution by way of example and do not limit the protection scope of this application.

[0030] Please refer to Figure 1 , Figure 1 which is the overall side view of a demonstration device for the fire extinguishing process of a microcapsule fire extinguishing agent in a narrow space in an embodiment of this application. The demonstration device for the fire extinguishing process of a microcapsule fire extinguishing agent in a narrow space includes a combustion device (1), a ventilation device (2), a placement device (3), a wire passing device (4) and a data acquisition system (5).

[0031] Please refer to Figure 2 , Figure 2It is a combustion device of a demonstration device for the fire extinguishing process of a microcapsule fire extinguishing agent in a narrow space in an embodiment of the present application. In the present application, the combustion device (1) preferably adopts a cuboid structure without an upper bottom and a lower bottom. The combustion device (1) includes an upper-layer combustion device (11) and a lower-layer combustion device (12). Both the upper-layer combustion device (11) and the lower-layer combustion device (12) are composed of four transparent heat-resistant side plates. At the central position on the four sides of the bottom of the upper-layer combustion device (11), there is a convex structure (111) respectively. At the central position on the four sides of the top of the lower-layer combustion device (12), there is a groove structure (121) respectively. The heights of the four groups of convex structures (111) are the same as the depths of the four groups of groove structures (121). The four groups of convex structures (111) and the corresponding four groups of groove structures (121) are closely fitted at their joint parts, realizing seamless splicing. The height of the upper-layer combustion device is fixed at 6 cm. The height of the combustion device (1) can be adjusted by adjusting the height of the lower-layer combustion device (12) with a similar structure to the lower-layer combustion device (12) to control the distance of the fire source.

[0032] The ventilation device (2) has an air inlet cylinder (21). The air inlet cylinder (21) is arranged horizontally on the outer wall surface of the right side of the upper-layer combustion device (11). At the connection position between the ventilation device (2) and the upper-layer combustion device (11), there is a wind tunnel plate (22). The wind tunnel plate (22) is located at a position slightly above the right side wall surface of the upper-layer combustion device (11). Inside the ventilation device (2), there are rotating four blades (23) that help promote gas flow.

[0033] The wire passing device (4) includes an upper wire passing device (41) and a lower wire passing device (42). Both the upper wire passing device (41) and the lower wire passing device (42) are arranged horizontally on the outer wall surface of the left side of the upper-layer combustion device (11). The upper wire passing device (41) is located at the uppermost position of the left side wall surface of the upper-layer combustion device (11). The lower wire passing device (42) is located at the central position of the left side wall surface of the upper-layer combustion device (11). The upper wire passing device (41) is installed directly above the lower wire passing device (42).

[0034] Please refer to Figure 3 , Figure 3 It is a bottom view of a placement device of a demonstration device for the fire extinguishing process of a microcapsule fire extinguishing agent in a narrow space in an embodiment of the present application. The placement device (3) includes a wire mesh (31), a patch (32), and a microcapsule fire extinguishing agent (33). The wire mesh (31) provides a bottom environment for the microcapsule fire extinguishing agent (33) during the fire extinguishing experiment of the microcapsule fire extinguishing agent in a narrow space.

[0035] In this application, the wire mesh (31) preferably uses a 21-wire 60-mesh temperature-resistant wire mesh, and the patch (32) preferably uses a silicone patch; the size of the patch (32) is the same as that of the wire mesh (31), and both are slightly larger than the length and width of the combustion device (1). The upper surface of the patch (32) is attached to the lower surface of the wire mesh (31), and the microcapsule fire extinguishing agent (33) is adhered to the lower surface of the patch (32). The microcapsule fire extinguishing agent (33) is arranged at the center of the patch (32); the placement device (3) is arranged on the top of the upper combustion device (11).

[0036] The data acquisition system (5) includes a temperature measurement system (51), a gas measurement system (52), a camera system (53), a weighing system (54), and a timing system (55).

[0037] The temperature measurement system (51) includes a thermocouple data collector (511), a thermocouple 1 (512), and a thermocouple 2 (513); the thermocouple 1 (512) passes through the upper wire passing device (41) to measure the temperature change on the surface of the microcapsule fire extinguishing agent (33), and the thermocouple 2 (513) passes through the lower wire passing device (42) and extends to the bottom of the combustion device (1) to measure the ambient temperature change in the combustion device (1) during the microcapsule fire extinguishing agent fire extinguishing experiment in a narrow space. The extension wires of the thermocouple 1 (512) and the thermocouple 2 (513) are connected to the thermocouple data collector (511) and the computer. In this application, a K-type armored thermocouple is preferably used.

[0038] The gas measurement system (52) uses a high-precision gas concentration analyzer (521), and the extension wire of the high-precision gas concentration analyzer (521) is connected to the computer. The high-precision gas concentration analyzer (521) passes through the lower wire passing device (42) and extends to the bottom of the combustion device (1) to measure the gas concentration change in the combustion device (1) during the microcapsule fire extinguishing agent fire extinguishing experiment in a narrow space.

[0039] The camera system SiO 2 includes a high-speed camera (531) and a schlieren apparatus (532); the high-speed camera (531) is used to monitor in real time the rupture process of the fire extinguishing agent in a high-temperature environment during the microcapsule fire extinguishing agent fire extinguishing experiment in a narrow space, and capture the instantaneous changes of the fire extinguishing agent; the schlieren apparatus (532) is used to observe and study the gas distribution during the microcapsule fire extinguishing agent fire extinguishing experiment in a narrow space. In this application, a liftable schlieren apparatus is preferably used.

[0040] The weighing system (54) includes an electronic balance (541) with a precision of 0.001 g. The electronic balance (541) is placed under the combustion device (1), and the electronic balance (541) is used to record in real time the mass change of the experimental sample during the microcapsule fire extinguishing agent fire extinguishing experiment in a narrow space.

[0040] The timing system (55) refers to a high-precision electronic timer (551), which is used to accurately measure the time when the fire source extinguishes during the fire extinguishing experiment of microcapsule fire extinguishing agent in a narrow space.

[0041] The fire source is a candle (6) with a certain specification, and the height of the candle is 5 cm. The flame of the burning candle is used as the fire source for the fire extinguishing experiment of microcapsule fire extinguishing agent in a narrow space.

[0042] The transparent heat-resistant side plates selected in this application facilitate the observation and recording of the fire extinguishing experiment phenomena of microcapsule fire extinguishing agent in a narrow space during the experiment. The upper combustion device (11) and the lower combustion device (12) can be moved according to the experimental conditions, which is convenient for the installation, layout, recovery and cleaning of materials.

[0043] Example 1: According to the experimental requirements, the convex structure of the upper combustion device and the groove structure of the lower combustion device are closely spliced into a combustion device. The combustion device and the candle are placed on the electronic balance, and the candle is placed in the middle of the combustion device. The probe of thermocouple 1 passes through the upper wire passing device and extends to the surface of the microcapsule fire extinguishing agent. The probes of thermocouple 2 and the high-precision gas concentration analyzer pass through the lower wire passing device and extend to the bottom of the combustion device. The upper surface of the patch is attached under the wire mesh, and the microcapsule fire extinguishing agent is adhered under the patch according to the experimental requirements, so that the three form a placement device. Turn on the ventilation device, high-speed camera, schlieren instrument, data acquisition instrument, high-precision gas concentration analyzer, electronic balance and computer, light the candle, arrange the whole placement device above the combustion device, and turn on the electronic timer at the same time. The experiment starts to record the process of the fire extinguishing experiment of microcapsule fire extinguishing agent in a narrow space.

[0044] Example 2: According to the experimental requirements, the distance of the fire source is used as a variable, and other experimental parameters remain the same. Five lower combustion devices with groove structures with heights of 1 cm, 1.5 cm, 2 cm, 2.5 cm, and 3 cm respectively and the upper combustion device with a fixed height are spliced to form a combustion device. The rest is the same as that in Example 1, and the experiment starts to record the process of the fire extinguishing experiment of microcapsule fire extinguishing agent in a narrow space.

[0045] Example 3: According to the experimental requirements, the area of the microcapsule fire extinguishing agent is used as a variable, and other experimental parameters remain the same. Five groups of microcapsule fire extinguishing agents with areas of 1 cm 2 , 1.5 cm 2 , 2 cm 2 , 2.5 cm 2 , 3 cm 2 are set on the patch respectively. The rest is the same as that in Example 1, and the experiment starts to record the process of the fire extinguishing experiment of microcapsule fire extinguishing agent in a narrow space.

[0046] Example 4: According to the experimental requirements, the fire source power in the microcapsule fire extinguishing agent was used as a variable, and other experimental parameters were kept consistent. Four groups of candles with different fire source powers were set up respectively. The rest was the same as in Example 1, and the process of the fire extinguishing experiment of the microcapsule fire extinguishing agent in a confined space was recorded at the beginning of the experiment.

[0047] The above embodiments are only for illustrating the technical concept and features of the present application, and the purpose is to enable those who are familiar with this technology to understand the content of the present application and implement it accordingly, and it cannot be used to limit the protection scope of the present application. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present application.

Claims

1. A demonstration device for the fire extinguishing process of a microcapsule fire extinguishing agent in a narrow space, characterized by: The invention comprises a combustion device (1), a ventilation device (2), a placement device (3), a wiring device (4) and a data acquisition system (5). The combustion device (1) is used to simulate a narrow space, a fire source is arranged in the middle, and the outer shell is made of fireproof glass with a certain thickness, so as to provide a microcapsule fire extinguishing agent fire extinguishing experimental environment in the narrow space that can be isolated from the external environment; The ventilation device (2) is used to provide the gas required for combustion during the fire extinguishing experiment of the microcapsule fire extinguishing agent in the narrow space; The placement device (3) is used to place the microcapsule fire extinguishing agent required for combustion during the microcapsule fire extinguishing agent fire extinguishing experiment in the narrow space; The wire-passing device (4) is used to introduce the instrument probes required in the narrow space microcapsule fire extinguishing agent fire extinguishing experiment; The data acquisition system (5) is used to collect experimental data during the narrow space microcapsule fire extinguishing agent fire extinguishing experiment.

2. The fire extinguishing process demonstration device of microcapsule fire extinguishing agent in a narrow space according to claim 1 is characterized in that: The combustion device (1) comprises an upper combustion device (11) and a lower combustion device (12), wherein the upper combustion device (11) and the lower combustion device (12) are both composed of four transparent heat-resistant side panels; a protruding structure (111) is provided at the center of the four sides of the bottom of the upper combustion device (11), and a groove structure (121) is provided at the center of the four sides of the top of the lower combustion device (12); the heights of the four groups of protruding structures (111) and the depths of the four groups of groove structures (121) are consistent, and the four groups of protruding structures (111) and the corresponding four groups of groove structures (121) are tightly matched at their intersections, thereby achieving seamless splicing; the height of the combustion device (1) can be adjusted by adjusting the height of the lower combustion device (12) having a similar structure to the lower combustion device (12).

3. The fire extinguishing process demonstration device of microcapsule fire extinguishing agent in a narrow space according to claim 1 is characterized in that: The ventilation device (2) has an air inlet pipe (21), and the air inlet pipe (21) is arranged horizontally on the right outer wall of the upper combustion device (11). A wind tunnel plate (22) is provided at the connection position between the ventilation device (2) and the upper combustion device (11), and the wind tunnel plate (22) is located slightly above the right wall of the upper combustion device (11). The ventilation device (2) is internally equipped with rotating blades (23) that help promote gas flow.

4. The fire extinguishing process demonstration device of microcapsule fire extinguishing agent in a narrow space according to claim 1 is characterized in that: The placement device (3) comprises the wire mesh (31), the patch (32) and the microcapsule fire extinguishing agent (33); the size of the patch (32) is consistent with the size of the wire mesh (31) and both are slightly larger than the length and width of the combustion device (1); the top of the patch (32) is attached to the bottom of the wire mesh (31); the microcapsule fire extinguishing agent (33) is attached to the bottom of the patch (32); the microcapsule fire extinguishing agent (33) is arranged at the center of the patch (32); the placement device (3) is arranged on the top of the upper combustion device (11).

5. The fire extinguishing process demonstration device of microcapsule fire extinguishing agent in a narrow space according to claim 1 is characterized in that: The wire-passing device (4) comprises an upper wire-passing device (41) and a lower wire-passing device (42); the upper wire-passing device (41) and the lower wire-passing device (42) are both arranged in a horizontal direction on the left outer wall of the upper combustion device (11); the upper wire-passing device (41) is located at the top of the left wall of the upper combustion device (11); the lower wire-passing device (42) is located at the center of the left wall of the upper combustion device (11); and the upper wire-passing device (41) is installed directly above the lower wire-passing device (42).

6. The fire extinguishing process demonstration device of microcapsule fire extinguishing agent in a narrow space according to claim 1 is characterized in that: The data acquisition system (5) comprises a temperature measurement system (51), a gas measurement system (52), an imaging system (53), a weighing system (54) and a timing system (55).

7. The fire extinguishing process demonstration device of microcapsule fire extinguishing agent in a narrow space according to claim 6 is characterized in that: The temperature measurement system (51) comprises a thermocouple data acquisition instrument (511) and a thermocouple 1 (512) and a thermocouple 2 (513); the thermocouple 1 (512) passes through an upper wire-through device (41) to measure the temperature change on the surface of the microcapsule fire extinguishing agent (33), and the thermocouple 2 (513) passes through a lower wire-through device (42) and extends to the bottom of the combustion device (1) to measure the ambient temperature change in the combustion device (1) during a microcapsule fire extinguishing agent fire extinguishing experiment in a narrow space. The gas measurement system (52) utilizes a high-precision gas concentration analyzer (521), and the high-precision gas concentration analyzer (521) extends through the lower wire device (42) to the bottom of the combustion device (1) to measure the change in gas concentration in the combustion device (1) during the microcapsule fire extinguishing agent fire extinguishing experiment in a narrow space. The camera system (53) comprises a high-speed camera (531) and a schlieren instrument (532); the high-speed camera (531) is used to monitor in real time the rupture process of the fire extinguishing agent in a high-temperature environment during a fire extinguishing experiment of a microcapsule fire extinguishing agent in a narrow space, and to capture instantaneous changes of the fire extinguishing agent; the schlieren instrument (532) is used to observe and study the gas distribution during the fire extinguishing experiment of a microcapsule fire extinguishing agent in a narrow space. The weighing system (54) comprises an electronic balance (541) with an accuracy of 0.001 g. The electronic balance (541) is placed under the combustion device (1). The electronic balance (541) is used to record in real time the mass change of the experimental sample during the fire extinguishing experiment of the microcapsule fire extinguishing agent in a narrow space. The timing system (55) refers to a high-precision electronic timer (551), which is used to accurately measure the time it takes for a fire source to be extinguished during a fire extinguishing experiment using a microcapsule fire extinguishing agent in a narrow space.

8. The fire extinguishing process demonstration device of microcapsule fire extinguishing agent in a narrow space according to claim 7 is characterized in that: The fire source is a candle (6) of certain specifications, and the flame of the burning candle is used as the fire source to carry out a fire extinguishing experiment using a microcapsule fire extinguishing agent in a narrow space.

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