CN217339872U

CN217339872U - Aerosol fire extinguisher

Info

Publication number: CN217339872U
Application number: CN202220838751.0U
Authority: CN
Inventors: 李双庆
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2022-09-02
Anticipated expiration: 2032-04-12

Abstract

The utility model relates to an aerosol fire extinguisher, which comprises an inner cylinder, a shell and a starting line, wherein the shell comprises a top wall and a first side wall, one end of the first side wall is connected with the top wall, and the other side of the first side wall forms an opening; the inner tube includes diapire and second lateral wall, and the diapire lid closes the opening, and the second lateral wall is located first lateral wall, and forms annular space with first lateral wall, and the diapire is connected to the one end of second lateral wall, and the other end forms seal structure with the roof, and the area that the inner tube is close to the diapire is provided with the fire extinguishing agent. The fire extinguishing agent is ignited and then releases aerosol, the fire extinguishing agent is sprayed towards the top wall, the aerosol is reflected by the top wall and is restrained by the second side wall, the aerosol can be rebounded to the burning position of the fire extinguishing agent, the flame pressure of the burning position of the fire extinguishing agent is increased, the burning rate of the fire extinguishing agent is further accelerated, the fire extinguishing agent can burn and release the aerosol in a shorter time, the spraying amount and the spraying speed of the aerosol in unit time are improved, and the fire extinguishing effect of the fire extinguisher is improved.

Description

Aerosol fire extinguisher

Technical Field

The utility model relates to a fire extinguisher technical field especially relates to an aerosol fire extinguisher.

Background

The aerosol fire extinguisher is filled with fire extinguishing agent, and when a fire occurs, the fire extinguishing agent is ignited to spray the aerosol outwards, so that the purpose of extinguishing the fire is achieved.

For the fire extinguishing agent, the looser the fire extinguishing agent is, the higher the combustion efficiency is; but the more the agent is loosened for the same mass of agent, the more space it needs to be loaded with. Therefore, for an aerosol fire extinguisher applied to an application scene requiring quick release of aerosol, a powdered fire extinguishing agent is usually loaded in the fire extinguisher to ensure the combustion efficiency of the fire extinguishing agent, and meanwhile, in order to ensure the release amount of the aerosol, the fire extinguishing agent with enough quality needs to be loaded in the aerosol fire extinguisher, so that the aerosol fire extinguisher has a large size; in a small-space use scene, there is not enough installation space, which results in a small size of the aerosol fire extinguisher, and in order to ensure that a sufficient amount of aerosol can be released, such aerosol fire extinguisher is usually loaded with a more compact fire extinguishing agent, such as a block-shaped fire extinguishing agent, but because the combustion efficiency of such fire extinguishing agent is low, a large amount of aerosol cannot be released in a short time, which results in an undesirable fire extinguishing effect.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an aerosol fire extinguisher can set up cubic fire extinguishing agent in the inner tube to can accelerate the combustion efficiency of cubic fire extinguishing agent, with release a large amount of aerosols in the short time, thereby promote fire control effect.

The utility model discloses the technical scheme who adopts:

an aerosol fire extinguisher comprises an inner barrel, a shell and an actuating line, wherein the shell comprises a top wall and a first side wall, one end of the first side wall is connected with the top wall, and an opening is formed in the other side of the first side wall; the inner cylinder comprises a bottom wall and a second side wall, the bottom wall covers the opening, the second side wall is positioned in the first side wall and forms an annular space with the first side wall, one end of the second side wall is connected with the bottom wall, the other end of the second side wall and the top wall form a sealing structure, and a region of the inner cylinder, which is close to the bottom wall, is provided with a fire extinguishing agent;

the second side wall is provided with a plurality of exhaust ports, the exhaust ports are distributed along the circumferential direction of the second side wall, the exhaust ports penetrate through the second side wall in the thickness direction, and a first distance is reserved between the exhaust ports and the top wall;

one end of the starting line is inserted into the fire extinguishing agent, and the other end of the starting line penetrates out of the shell through the air outlet and the annular space;

the first side wall is provided with a plurality of nozzles which are distributed in the circumferential direction of the first side wall, and the nozzles and the exhaust port are staggered in the axial direction of the inner barrel.

Preferably, an end surface of the other end of the second side wall abuts against the top wall; and a second distance is reserved between the exhaust port and the end face, close to the top wall, of the second side wall.

Preferably, an annular protrusion is arranged on the outer side of the second side wall, and the annular protrusion is located on one side of the exhaust port close to the top wall.

Preferably, the housing further comprises an annular structure extending from the top wall, the annular structure being in clearance fit with the second side wall; the exhaust port is at least partially exposed from the annular structure in an axial direction of the inner cylinder.

Preferably, in the axial direction of the inner cylinder, the distance between the exhaust port and the bottom wall is a fourth distance, the ratio of the fourth distance to the sum of the axial length of the exhaust port and the first distance is 3.5-4.2, and the ratio of the axial length of the exhaust port to the first distance is 1.8-2.2.

Preferably, the volume of the aerosol fire extinguisher is not more than 60cm ³ The compacted volume of fire suppressant is no less than 40% of the volume of the housing.

Preferably, the shape of the exhaust port is rectangular, the size of the exhaust port in the axial direction of the inner cylinder is 2.5-3.5mm, and the circumferential length of the exhaust port in the circumferential direction of the inner cylinder is at least 8 mm.

Preferably, the spout is disposed close to the bottom wall, and a third space is left between the spout and the bottom wall.

Preferably, the roof orientation the mounting groove has been seted up to one side of diapire, install the sensor that is used for detecting the temperature in the mounting groove, the lead-out wire of sensor is through one the gas vent the annular space is worn out the shell.

Preferably, a notch is formed in the end part, close to the bottom wall, of the first side wall, and the outgoing line of the sensor and the starting line penetrate out of the shell through the notch.

The utility model has the advantages that:

in the utility model, when the fire extinguishing agent is ignited, the released aerosol is sprayed towards the top wall, the aerosol is reflected by the top wall and is restrained by the second side wall, and the aerosol can be rebounded to the burning part of the fire extinguishing agent, so that the flame pressure of the burning part of the fire extinguishing agent is increased, the burning rate of the fire extinguishing agent is accelerated, the fire extinguishing agent can burn in a shorter time and release a larger amount of aerosol, the spraying amount and the spraying speed of the aerosol in unit time are improved, and the fire extinguishing effect of the fire extinguisher is improved; and the aerosol reflected again by the fire extinguishing agent enters the annular space from the exhaust port and is sprayed out from the nozzle through the annular space, so that the formed complex path can effectively cool the aerosol, reduce the temperature of the aerosol sprayed out from the nozzle, eliminate residues in the aerosol and reduce the amount of residues contained in the aerosol sprayed out from the nozzle.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural view of a preferred embodiment of an aerosol fire extinguisher according to the present invention;

FIG. 2 is an exploded view of the aerosol fire extinguisher shown in FIG. 1;

FIG. 3 is a top plan view of the aerosol fire extinguisher of FIG. 1;

FIG. 4 is a cross-sectional view taken along line X-X in FIG. 3;

FIG. 5 is another cross-sectional view of an aerosol fire extinguisher;

FIG. 6 is a bottom view of the housing;

FIG. 7 is a cross-sectional view of the inner barrel.

In the figure: 1. a housing; 2. an inner barrel; 3. starting a line; 4. a sensor; 5. a fire extinguishing agent; 6. an inner barrel space; 7. an annular space;

11. a top wall; 12. a first side wall; 13. a spout; 14. a notch; 15. mounting grooves; 16. a cyclic structure;

21. a bottom wall; 22. a second side wall; 23. an exhaust port; 24. an annular projection;

41. a sensor body; 42. an outgoing line;

221. a first belt region; 222. a second belt region; 223. a third annulus region.

Detailed Description

The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth in order to avoid obscuring the spirit of the present invention, well-known methods, procedures, flows, and components have not been described in detail.

Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".

In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified. And the orientations of "upper" and "lower" are described for convenience of description, the relative positions of the outer shell 1 and the inner cylinder 2 are described in the state of fig. 2, and the actual orientation of the aerosol fire extinguisher during use or processing is not limited.

Referring to fig. 1-7, the utility model provides an aerosol fire extinguisher for put out a fire, be particularly useful for the small space and use, if be used for putting out a fire to automatically controlled cabinet, storage battery charging case. The aerosol fire extinguisher comprises an inner cylinder 2, a shell 1 and a starting line 3, wherein the shell 1 comprises a top wall 11 and a first side wall 12, one end of the first side wall 12 is connected with the top wall 11, and the other side of the first side wall 12 forms an opening; the inner cylinder 2 comprises a bottom wall 21 and a second side wall 22, the bottom wall 21 covers the opening, the second side wall 22 is located in the first side wall 12 and forms an annular space 7 with the first side wall 12, one end of the second side wall 22 is connected with the bottom wall 21, the other end and the top wall 11 form a sealing structure, and the area of the inner cylinder 2 close to the bottom wall 21 is provided with a fire extinguishing agent 5.

The second side wall 22 is provided with a plurality of exhaust ports 23, the exhaust ports 23 are distributed along the circumferential direction of the second side wall 22, and the exhaust ports 23 penetrate through the second side wall 22 in the thickness direction (radial direction) and leave a first distance from the top wall 11.

One end of the activation wire 3 is inserted into the extinguishing agent 5 and the other end of the activation wire 3 is passed out of the housing 1 through an exhaust opening 23 and the annular space 7.

The first side wall 12 is provided with a plurality of nozzles 13, the plurality of nozzles 13 are distributed in the circumferential direction of the first side wall 12, and the nozzles 13 and the exhaust port 23 are staggered in the axial direction of the inner tube 2.

Specifically, the housing 1 is located above the inner cylinder 2, the housing 1 includes a top wall 11 and a first side wall 12 extending downward from the top wall 11, and the first side wall 12 is a cylindrical structure, so that the housing 1 forms a downward opening. The inner cylinder 2 comprises a bottom wall 21 and a second side wall 22 extending upwards from the bottom wall 21, the second side wall 22 is a cylindrical structure, the inner cylinder 2 forms an upward opening, the outer shell 1 is sleeved on the outer side of the inner cylinder 2 from top to bottom, so that the first side wall 12 is positioned on the outer side of the second side wall 22, an annular space 7 is formed between the first side wall 12 and the second side wall 22, the bottom wall 21 covers the downward opening of the outer shell 1 from bottom, the upper end of the second side wall 22 extends to the top wall and forms a sealing structure with the top wall 11 to seal the upward opening of the inner cylinder 2 from the upper side, therefore, the upper end of the second side wall 22 is basically sealed by the sealing structure, the lower end is sealed by the bottom wall 21, a relatively closed inner cylinder space 6 is formed in the inner cylinder 2, and the fire extinguishing agent 5 is arranged in the inner cylinder space 6.

The second side wall 22 is provided with a plurality of exhaust ports 23, and the exhaust ports 23 penetrate through the second side wall 22 in the radial direction, so that the inner cylinder space 6 is communicated with the annular space 7 through the exhaust ports 23, and aerosol released when the fire extinguishing agent 5 in the inner cylinder space 6 is combusted can smoothly enter the annular space 7.

The first side wall 12 is provided with a plurality of nozzles 13, the nozzles 13 are communicated with the outside and the annular space 7, when a fire condition exists in the outside, the starting line 3 ignites the fire extinguishing agent 5, the fire extinguishing agent 5 burns to release aerosol, and the aerosol passes through the exhaust port 23 and the annular space 7 from the inner cylinder space 6 and is sprayed out from the nozzles 13, so that the purpose of fire extinguishing is achieved.

The starting wire 3 can be a heat-sensitive wire or an electric initiation wire, and when the starting wire is the heat-sensitive wire, the heat-sensitive wire can be directly ignited by external fire, so that the fire extinguishing agent is ignited through the heat-sensitive wire; when the fire extinguishing agent is an electric initiating wire, the fire extinguishing agent is ignited by controlling the electric initiating wire when a fire occurs.

In the utility model, the fire extinguishing agent 5 adopts the compact block fire extinguishing agent 5, and compared with the powdery fire extinguishing agent 5 with the same mass, the volume of the block fire extinguishing agent 5 is smaller, so that the aerosol fire extinguisher has smaller size and can adapt to the requirement of fire extinguishing in a small space; meanwhile, a relatively closed inner cylinder space 6 is formed in the aerosol fire extinguisher, after the fire extinguishing agent 5 is ignited, the fire extinguishing agent 5 is combusted to release aerosol, the aerosol is sprayed upwards (towards the direction of the top wall 11), a part of the aerosol is rebounded through the top wall 11 and rebounds to a combustion position of the fire extinguishing agent 5, another part of the aerosol is sprayed to the top wall 11 and then diffuses outwards from inside along the radial direction of the top wall 11, and because a first distance is reserved between the exhaust port 23 and the top wall 11, a solid blocking structure (such as a first annular area described below) is formed between the exhaust port 23 and the top wall 11, and under the blocking of the blocking structure, the part of the aerosol cannot continuously diffuse outwards and only flows downwards from top to top and then reaches the combustion position of the fire extinguishing agent 5, the two parts of the aerosol increase the combustion pressure of the combustion position of the fire extinguishing agent 5, and because of the increase of the combustion pressure, thereby promoted the burning rate and the efficiency of fire extinguishing agent 5, and then promoted the injection quantity of unit interval of aerosol for fire extinguishing agent 5 can burn and release aerosol (fire extinguishing agent 5 can finish in 3 s) in the shorter time, consequently, even the fire extinguishing agent is fine and close cubic fire extinguishing agent, also can realize the purpose of releasing a large amount of aerosols in the short time, promotes the fire extinguishing effect who disposes the fire extinguisher of cubic fire extinguishing agent 5. Moreover, the aerosol is sprayed from the air outlet 23 to hit the first side wall 12, flows downwards in the annular space 7 under the guidance of the first side wall 12 and the second side wall 22, and is sprayed out from the spray opening 13 (the position of the spray opening 13 is lower relative to the position of the air outlet 23, so that the spray opening 13 is closer to the bottom wall 21), the path of the aerosol flowing in the aerosol fire extinguisher is increased, the aerosol is effectively cooled, and the temperature of the aerosol sprayed out from the spray opening 13 is reduced; meanwhile, the combustion pressure of the combustion position of the fire extinguishing agent 5 is increased, so that the fire extinguishing agent 5 can be sufficiently combusted, on one hand, the total release amount of aerosol is increased, and the residue amount in the aerosol is also reduced, when the aerosol flows in the aerosol fire extinguisher, the aerosol changes the flow direction for many times, so that a complex airflow path is formed, and when the aerosol changes the flow direction, the residue in the aerosol can be deposited, so that the residue amount contained in the aerosol which is finally sprayed out from the nozzle 13 is reduced.

Referring to fig. 4, in a preferred embodiment of the present invention, the end surface of the other end of the second side wall 22 abuts against the top wall 11; the exhaust port 23 is spaced a second distance from the end of the second side wall 22 adjacent the top wall 11.

That is, the upper end surface of the second sidewall 22 abuts against the top wall 11, so that the upper end surface of the second sidewall 22 abuts against the lower side surface of the top wall 11, that is, the top wall 11 covers the upward opening of the inner cylinder 2 from the upper side, a second distance is left between the exhaust port 23 and the upper end surface of the second sidewall 22, so that the second sidewall 22 is divided into three annular belt regions along the axial direction thereof, the portion of the second sidewall 22 where the exhaust port 23 is located forms the first annular belt region 221, the portion of the second sidewall 22 where the exhaust port 23 is located forms the second annular belt region 222, the portion of the second sidewall 22 where the exhaust port 23 is located forms the third annular belt region 223, the fire extinguishing agent 5 is preferably disposed in the space surrounded by the third annular belt region 223, the fire extinguishing agent 5 may be a block-shaped fire extinguishing agent 5, the shape of the fire extinguishing agent 5 is adapted to the space surrounded by the third annular belt region 223, thereby realizing the largest amount of fire extinguishing agent 5, and the fire suppressant 5 does not affect the entry of aerosol from the exhaust port 23 into the annular space 7. After the fire extinguishing agent 5 is ignited, the fire extinguishing agent 5 burns to release aerosol, the aerosol is sprayed upwards (towards the direction of the top wall 11), a part of the aerosol rebounds through the top wall 11 and rebounds to the burning position of the fire extinguishing agent 5, another part of the aerosol is sprayed to the top wall 11 and then diffuses outwards from inside along the radial direction of the top wall 11, when reaching the first annular zone 221, the aerosol is blocked by the first annular zone 221 and flows downwards from top to bottom along the first annular zone 221 (the second side wall 22) and also reaches the burning position of the fire extinguishing agent 5, and therefore the purpose of increasing the burning pressure of the burning position of the fire extinguishing agent 5 is achieved.

Since the upper end surface of the second side wall 22 abuts against the top wall 11, the first pitch is equal to the second pitch.

Referring to fig. 2 and 4, preferably, the second side wall 22 is provided with an annular protrusion 24 on the outer side, the annular protrusion 24 is located on the side of the exhaust port 23 close to the top wall 11, and the annular protrusion 24 is in clearance fit with the first side wall 12.

The annular projection 24 is located in the first annular band region 221, i.e. the annular projection 24 is located on the upper side of the exhaust opening 23, so that the annular projection 24 does not affect the flow of aerosol ejected from the exhaust opening 23 in the annular space 7. After the assembly of the outer shell 1 and the inner cylinder 2 is completed, the bottom wall 21 covers the lower port of the first side wall 12, and meanwhile, the upper side of the inner cylinder 2 is in clearance fit with the first side wall 12 through the annular protrusion 24, so that the upper part and the lower part of the inner cylinder 2 are limited, the upper area of the inner cylinder 2 is basically fixed, and the inner cylinder can be relatively stably located in the outer shell 1.

The clearance fit between the annular protrusion 24 and the first sidewall 12, or both, is no greater than 0.5mm, such as 0.1mm, 0.2mm, 0.3mm, 0.4mm, or 0.5 mm.

The annular projection 24 may be formed by bulging the entire first ring belt region 221 outward, the height of the annular projection 24 in the axial direction (up-down direction) is the same as the height of the first ring belt region 221 in the axial direction (up-down direction), the upper end face of the annular projection 24 is flush with the upper end face of the first ring belt region 221, and the lower end face of the annular projection 24 is flush with the lower end face of the first ring belt region 221.

The annular projection 24 may also be replaced by a plurality of projections distributed along the circumference of the first ring belt region 221, the outer sides of which are in clearance fit with the first sidewall 12.

Referring to fig. 5 and 6, in another preferred embodiment of the present invention, the housing 1 further includes a ring structure 16 extending from the top wall 11, the ring structure 16 being in clearance fit with the second side wall 22; the exhaust port 23 is at least partially exposed from the annular structure 16 in the axial direction of the inner cylinder 2.

The ring structure 16 may be located outside the second side wall 22 or inside the second side wall 22, the ring structure 16 extends downward, and the lower end surface of the ring structure 16 is lower than the upper end surface of the second side wall 22, so that even if a distance is left between the upper end surface of the second side wall 22 and the top wall 11, the ring structure 16 can seal the gap formed by the distance, i.e., the gap can be substantially sealed between the upper portion (the first ring belt region as described above) of the second side wall 22 and the top wall, so as to prevent aerosol from directly entering the annular space 7 along the top wall 11, and ensure that the aerosol released by the burning of the fire extinguishing agent 5 can enhance the flame pressure at the burning of the fire extinguishing agent 5.

Taking the annular structure 16 located inside the second side wall 22 as an example, the fire extinguishing agent 5 burns to release aerosol, the aerosol is sprayed upwards (towards the direction of the top wall 11), a part of the aerosol bounces through the top wall 11, the part of the aerosol bounces to the burning position of the fire extinguishing agent 5, another part of the aerosol is sprayed to the top wall 11 and then diffuses from inside to outside along the top wall 11 in the radial direction, and when reaching the annular structure 16, the aerosol is blocked by the annular structure 16 and flows from top to bottom along the annular structure 16 to reach the burning position of the fire extinguishing agent 5, and the two parts of the aerosol increase the burning pressure of the burning position of the fire extinguishing agent 5.

In this embodiment, for each outlet opening 23, the annular structure 16 is at least partially exposed, ensuring that the annular structure 16 does not block the outlet opening 23, ensuring that aerosol in the inner cartridge 2 can enter the annular space 7. Preferably, the ring structure 16 completely avoids the exhaust opening 23, i.e. the lower end surface of the ring structure 16 is located within the first ring belt region 221.

Since the annular structure 16 and the annular second side wall 22 are sleeved with each other, the annular structure 16 is a part of the housing 1, so that the housing 1 radially limits the upper part of the inner cylinder 2 through the annular structure 16, so that the inner cylinder 2 is relatively stably connected with the housing 1, and the annular protrusion 24 can be eliminated.

Referring to fig. 7, preferably, in the axial direction of the inner cylinder 2, the distance between the exhaust port 23 and the bottom wall 21 is a fourth distance, the ratio of the fourth distance to the sum of the axial length of the port of the exhaust port 23 and the first distance is 3.5-4.2, and the ratio of the axial length of the exhaust port 23 to the first distance is 1.8-2.2.

Taking the example where the upper end surface of the second side wall 22 abuts the top wall 11, in this case, the axial length of the first belt region 221 is a (corresponding to the first pitch), the axial length of the second belt region 222 is B (corresponding to the axial length of the exhaust port), the axial length of the third belt region 223 is C (corresponding to the fourth pitch),

3.5-4.2, it can be seen that the space surrounded by the third annular zone 223 accounts for 77% -81% of the whole inner cylinder space 6, so that most of the space in the inner cylinder 2 can be used for containing the fire extinguishing agent 5, the loading amount of the fire extinguishing agent 5 is increased, the total release amount of the aerosol is increased, and the fire extinguishing effect of the aerosol fire extinguisher is improved.

By "the ratio of the axial length of the exhaust port 23 in the area of the second sidewall 22 to the first spacing is 1.8-2.2", it is meant that the B/a is 1.8-2.2, such that the axial length of the exhaust port 23 is greater than the axial length of the first annulus 221, such that the exhaust port 23 is of sufficient size to pass through the aerosol and prevent debris in the aerosol from clogging the exhaust port 23.

The number of the exhaust ports 23 is plural, and the plural exhaust ports 23 may be arranged in a line around the axis of the second side wall 22, or may be arranged in two or more lines.

Preferably, the volume of the aerosol fire extinguisher is no greater than 60cm ³ The compacted volume of the fire extinguishing agent 5 is not less than 40% of the volume of the housing 1.

The volume of the aerosol fire extinguisher is not more than 60cm ³ The aerosol fire extinguisher has small integral size and can be applied to small space, and under some conditions, the aerosol fire extinguisher can be 35-50cm ³ For example, the volume of the aerosol fire extinguisher is 37. + -.1 cm ³ Outside, inThe volume of the shell 1 is 26 +/-1 cm ³ The volume of the fire extinguishing agent 5 (the space surrounded by the third annular zone 223) is 13. + -.1 cm ³ So that about half the volume of the housing 1 is used to contain the fire extinguishing agent 5, the remaining space occupied by the second side wall 22, the annular space 7 and the space enclosed by the first annular zone 221 and the second annular zone 222 are used to ensure the loading of the fire extinguishing agent 5, the fire extinguishing agent 5 is a compacted block of fire extinguishing agent 5, the mass of the loaded fire extinguishing agent 5 is ensured, and the total amount of the finally released aerosol is ensured.

Preferably, the shape of the exhaust port 23 is rectangular, the size of the exhaust port 23 in the axial direction of the inner tube 2 is 2.5 to 3.5mm, and the circumferential length of the exhaust port 23 in the circumferential direction of the inner tube 2 is at least 8 mm.

The specific dimensions of the vent 23 are such that debris in the aerosol does not block the vent 23 after the aerosol passes through the vent 23.

Preferably, the spout 13 is disposed adjacent to the bottom wall 21 with a third spacing from the bottom wall 21.

A third distance is left between the spout 13 and the bottom wall 21, so that the part of the annular space 7 below the spout 13 forms an annular groove with an upward opening. After the aerosol enters the annular space 7 from the exhaust port 23, the aerosol flows downwards, when the aerosol reaches the position of the nozzle 13, a small part of the aerosol is sprayed out from the nozzle 13, more aerosol flows downwards beyond the nozzle 13 and enters the annular groove, contacts with the bottom wall 21, rebounds through the bottom wall 21 and flows upwards and then is sprayed out from the nozzle 13, so that the aerosol flows back and forth in the annular space 7, the path of the aerosol is increased, the temperature of the aerosol is reduced, in addition, the aerosol contains residues, the aerosol is firstly sprayed onto the top wall 11 to change the flow direction of the aerosol, then reaches the fire extinguishing agent 5 to change the flow direction of the aerosol for the second time, and is sprayed out from the exhaust port 23 to the first side wall 12, the flow direction of the aerosol is changed for the third time, the aerosol flows downwards and rebounds upwards through the bottom wall 21, the flow direction of the aerosol is changed for the fourth time, and finally is sprayed out from the nozzle 13; during the above four times of aerosol flow direction change, the residue remaining in the aerosol may also impact and adhere to the corresponding wall (e.g., the top wall 11, the first side wall 12, the bottom wall 21, etc.), thereby reducing the residue in the aerosol ejected from the ejection opening 13. In addition, the annular groove is arranged to store a certain amount of residues.

Preferably, one side of the top wall 11 facing the bottom wall 21 is provided with an installation groove 15, a sensor 4 for detecting temperature is installed in the installation groove 15, and a leading-out wire 42 of the sensor 4 passes through the outer shell 1 through the exhaust port 23 and the annular space 7.

The sensor 4 comprises a sensor body 41 and an outgoing line 42 connected with the sensor body 41, the mounting groove 15 does not penetrate through the top wall 11, when the sensor body 41 is embedded in the mounting groove 15, people cannot directly observe the sensor body 41 from the outside, an interference fit mode can be adopted between the sensor body 41 and the mounting groove 15 so that the position of the sensor body 41 relative to the mounting groove 15 is unchanged, and the sensor body 41 and the mounting groove 15 can also be connected in a bonding mode so that the front surface of one surface of the sensor body 41 faces the fire extinguishing agent 5 in the inner cylinder space 6; during assembly, the sensor body 41 is firstly embedded in the mounting groove 15, the leading wire 42 of the sensor 4 passes through one exhaust port 23, preferably, the exhaust port 23 through which the leading wire 42 of the sensor 4 passes and the exhaust port 23 through which the starting wire 3 passes are the same exhaust port 23, then the shell 1 and the inner barrel 2 are assembled, after the shell 1 and the inner barrel 2 are clamped, the leading wire 42 of the sensor 4 is pulled outwards until the leading wire 42 cannot be pulled, and the sensor body 41 is embedded in the mounting groove 15, so that the sensor 4 cannot be pulled out of the mounting groove 15 when the leading wire 42 is pulled outwards. The lead-out wire 42 of the sensor 4 is used for externally connecting a circuit board so as to externally transmit the temperature signal detected by the sensor 4.

The sensor 4 is used for detecting the temperature, when the fire extinguishing agent 5 burns, high-temperature aerosol is released and can be sprayed onto the sensor body 41, when the sensor 4 detects that the temperature reaches or exceeds a set temperature, a signal is sent out outwards, and after the signal is received by the outside, the aerosol fire extinguisher is reminded to work to release the aerosol, so that the fire condition exists at the position of the aerosol fire extinguisher, wherein the set temperature is 150 ℃, 160 ℃, 170 ℃ or 180 ℃.

Preferably, the end of the first side wall 12 close to the bottom wall 21 is provided with a notch 14, and the leading line 42 of the sensor 4 and the start line 3 both pass through the notch 14 and out of the housing 1.

Preferably, the notch 14 extends through the lower edge of the first side wall 12 to facilitate the passage of the lead-out wire 42 and the start wire 3.

Of course, the notch 14 may be a closed structure, or the notch 14 may not be provided, and the outgoing line 42 and the starting line 3 may extend out of the spout 13.

It will be understood that the above-described embodiments are illustrative only and not restrictive, and that various obvious and equivalent modifications and substitutions may be made in the details described herein by those skilled in the art without departing from the basic principles of the invention.

Claims

1. An aerosol fire extinguisher is characterized by comprising an inner cylinder (2), a shell (1) and an actuating line (3), wherein the shell (1) comprises a top wall (11) and a first side wall (12), one end of the first side wall (12) is connected with the top wall (11), and the other side of the first side wall forms an opening; the inner cylinder (2) comprises a bottom wall (21) and a second side wall (22), the bottom wall (21) covers the opening, the second side wall (22) is located in the first side wall (12) and forms an annular space (7) with the first side wall (12), one end of the second side wall (22) is connected with the bottom wall (21), the other end of the second side wall and the top wall (11) form a sealing structure, and a fire extinguishing agent (5) is arranged in an area, close to the bottom wall (21), of the inner cylinder (2);

the second side wall (22) is provided with a plurality of exhaust ports (23), the exhaust ports (23) are distributed along the circumferential direction of the second side wall (22), the exhaust ports (23) penetrate through the second side wall (22) in the thickness direction, and a first distance is reserved between the exhaust ports and the top wall (11);

one end of the starting wire (3) is inserted into the fire extinguishing agent (5), and the other end of the starting wire (3) penetrates out of the shell (1) through the exhaust port (23) and the annular space (7);

the inner barrel is characterized in that a plurality of nozzles (13) are arranged on the first side wall (12), the nozzles (13) are distributed in the circumferential direction of the first side wall (12), and the nozzles (13) and the exhaust port (23) are staggered in the axial direction of the inner barrel (2).

2. An aerosol fire extinguisher as claimed in claim 1, characterized in that the end face of the other end of said second side wall (22) abuts against said top wall (11); the exhaust port (23) and the end face of the second side wall (22) close to the top wall (11) are spaced at a second distance.

3. An aerosol fire extinguisher according to claim 2, characterized in that the outside of the second side wall (22) is provided with an annular projection (24), the annular projection (24) being located on the side of the air outlet (23) close to the top wall (11).

4. An aerosol fire extinguisher according to claim 1, characterized in that said housing (1) further comprises an annular structure (16) extending from said top wall (11), said annular structure (16) being clearance fitted with said second side wall (22); the exhaust port (23) is at least partially exposed from the annular structure (16) in the axial direction of the inner cylinder (2).

5. An aerosol extinguisher according to claim 1, wherein the distance between the outlet port (23) and the bottom wall (21) in the axial direction of the inner barrel (2) is a fourth distance, the ratio of the fourth distance to the sum of the axial length of the outlet port (23) and the first distance is 3.5 to 4.2, and the ratio of the axial length of the outlet port (23) to the first distance is 1.8 to 2.2.

6. An aerosol fire extinguisher as claimed in claim 5, wherein the volume of said aerosol fire extinguisher is no greater than 60cm ³ The compacted volume of the fire extinguishing agent (5) is not less than 40% of the volume of the housing (1).

7. An aerosol fire extinguisher according to claim 5, wherein the shape of the outlet port (23) is rectangular, the size of the outlet port (23) in the axial direction of the inner barrel (2) is 2.5-3.5mm, and the circumferential length of the outlet port (23) in the circumferential direction of the inner barrel (2) is at least 8 mm.

8. An aerosol fire extinguisher as claimed in any one of claims 1 to 7, wherein said nozzle orifice (13) is located adjacent said bottom wall (21) with a third spacing from said bottom wall (21).

9. An aerosol fire extinguisher according to any one of claims 1 to 7, characterized in that a mounting groove (15) is formed in one side of the top wall (11) facing the bottom wall (21), a sensor (4) for detecting temperature is mounted in the mounting groove (15), and a lead wire (42) of the sensor (4) passes through the housing (1) through one of the exhaust ports (23) and the annular space (7).

10. An aerosol fire extinguisher according to claim 9, characterized in that the end of the first side wall (12) close to the bottom wall (21) is provided with a notch (14), and the outlet wire (42) of the sensor (4) and the activation wire (3) both exit the housing (1) through the notch (14).