CN114748819A

CN114748819A - Aerosol fire extinguisher

Info

Publication number: CN114748819A
Application number: CN202210381724.XA
Authority: CN
Inventors: 李双庆
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2022-07-15
Anticipated expiration: 2042-04-12
Also published as: CN114748819B

Abstract

The invention relates to an aerosol fire extinguisher, which comprises an inner cylinder and a shell arranged on the outer side of the inner cylinder, wherein the shell comprises a top wall and a first side wall extending downwards from the top wall; the inner tube includes the diapire and certainly the diapire second lateral wall that upwards extends, the diapire lid closes the lower port of first lateral wall, just the second lateral wall with the roof butt, the second lateral wall with form annular space between the first lateral wall. After the fire extinguishing agent is ignited, the formed aerosol is sprayed towards the top wall, the aerosol directly rebounds to the combustion surface of the fire extinguishing agent through the top wall, part of the aerosol rebounds to the second side wall through the top wall and reaches the combustion surface of the fire extinguishing agent under the guidance of the second side wall, so that the flame pressure at the combustion position of the fire extinguishing agent is enhanced, the combustion rate of the fire extinguishing agent can be accelerated, and the spraying amount and the spraying speed of the aerosol in unit time are improved.

Description

Aerosol fire extinguisher

Technical Field

The invention relates to the technical field of fire extinguishers, in particular to an aerosol fire extinguisher.

Background

Prior art document CN212593614U discloses a container and device of putting out a fire, including first casing and the end cover of screw locking, first casing has trompil and faces the same circular first mounting groove and annular second mounting groove, leave great air current channel between the cell wall port of first mounting groove and the end cover, place fire extinguishing agent in the first mounting groove, place coolant in the second mounting groove, fire extinguishing substance that fire extinguishing agent burning release sprays at the end cover place at first, just then along end cover internal surface lateral flow in the air current channel, in the second mounting groove is gone into unimpededly, cool down fire extinguishing substance through the coolant in the second mounting groove, fire extinguishing substance after the cooling is outwards spouted from the orifice of second mounting groove bottom.

In the art, it is desirable that the volume of the fire extinguisher is smaller and the fire extinguishing agent is combusted in a shorter time to release aerosol more quickly to improve the fire extinguishing effect, with a certain fire extinguishing amount.

Disclosure of Invention

In view of this, the present invention provides an aerosol fire extinguisher, which not only enables the volume of the fire extinguisher to be smaller, but also enables the fire extinguishing agent to burn and release the aerosol in a shorter time, thereby improving the fire extinguishing effect.

The technical scheme adopted by the invention is as follows:

an aerosol fire extinguisher comprises an inner cylinder and a shell arranged on the outer side of the inner cylinder, wherein the shell comprises a top wall and a first side wall extending downwards from the top wall; the inner cylinder comprises a bottom wall and a second side wall extending upwards from the bottom wall, the bottom wall covers the lower port of the first side wall, the second side wall is abutted to the top wall, and an annular space is formed between the second side wall and the first side wall;

in the direction from the top wall to the bottom wall, the second side wall is sequentially divided into a first ring belt area, a second ring belt area and a third ring belt area, the second ring belt area is provided with a plurality of exhaust ports which are arrayed along the circumferential direction, and the exhaust ports penetrate through the second side wall in the radial direction; a space surrounded by the third annular belt area and the bottom wall is internally provided with a fire extinguishing agent;

the aerosol fire extinguisher further comprises a thermosensitive wire, one end of the thermosensitive wire is inserted into the fire extinguishing agent, the thermosensitive wire penetrates through one of the exhaust ports, and goes around the second side wall in the annular space in the circumferential direction and penetrates out of the wire passing port of the first side wall, and the wire passing port is located at the lower part of the first side wall and penetrates through the lower edge of the first side wall;

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 are opposite to the third annular zone in the radial direction so that aerosol generated after the fire extinguishing agent is ignited by the heat-sensitive wire is sprayed to the top wall, rebounds to the fire extinguishing agent through the top wall, sequentially passes through the exhaust port and the annular space, and finally is sprayed out from the nozzles.

Preferably, the nozzle opening corresponds to an axially middle portion of the third ring belt region in the axial direction of the inner cylinder.

Preferably, the number of the exhaust ports is equal to that of the nozzles, the exhaust ports correspond to the nozzles one by one, and the positions of the exhaust ports and the positions of the nozzles are the same in the circumferential direction of the aerosol fire extinguisher.

Preferably, the plurality of exhaust ports comprise at least one first exhaust port and a plurality of second exhaust ports, the circumferential length of the first exhaust port is greater than that of the second exhaust port, one first exhaust port corresponds to the positions of two nozzles and one second exhaust port corresponds to the position of one nozzle in the axial direction of the aerosol fire extinguisher; the heat-sensitive wire passes through the first exhaust port.

Preferably, in the axial direction of the inner cylinder, the ratio of the axial length of the third ring belt region to the sum of the axial lengths of the first ring belt region and the second ring belt region is 3.5 to 4.2, and the ratio of the axial length of the second ring belt region to the axial length of the first ring belt region is 1.8 to 2.2.

Preferably, the shape of the exhaust port is rectangular, the axial length of the second ring belt region 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 outer side surface of the first ring belt region is provided with a convex ring which protrudes outwards, and the convex ring is in clearance fit with the first side wall.

Preferably, be equipped with the joint structure on the diapire, be equipped with on the first side wall with joint structure matched with draw-in groove, the joint structure with the draw-in groove joint, so that the inner tube with shell interconnect.

Preferably, the aerosol fire extinguisher is still including being used for detecting whether the sensor of fire extinguishing agent burning, the downside of roof is equipped with the mounting groove, the somatic part of sensor inlays to be located mounting groove and part expose the mounting groove, the lead wire of sensor passes one the gas vent, warp annular space is followed it wears out to cross the line mouth.

Preferably, the inner cylinder and the outer shell are both made of nylon plastics.

The invention has the beneficial effects that:

in the invention, the inner cylinder and the outer shell adopt mutually sleeved and matched structures, and only an annular space for accommodating a thermosensitive wire is reserved between the inner cylinder and the outer shell, so that the volume of the outer shell is smaller under the condition of a certain volume of the inner cylinder, thereby meeting the requirement of small volume of the fire extinguisher; meanwhile, after the fire extinguishing agent is ignited by the heat-sensitive wire, the aerosol released by the fire extinguishing agent is limited by the space enclosed by the first annular area, the second annular area and the top wall, so that the flame pressure at the burning position of the fire extinguishing agent can be rapidly increased, the burning rate of the fire extinguishing agent is further accelerated, the fire extinguishing agent can be fully burned in a shorter time and can release enough aerosol, the injection amount and the injection speed of the aerosol in unit time are improved, and the fire extinguishing effect of the fire extinguisher is improved; moreover, after the aerosol enters the annular space from the exhaust port, the aerosol is transversely sprayed out through the spray opening in the middle of the side surface of the annular space, so that the formed complex path can effectively cool the aerosol, and the temperature of the aerosol sprayed out from the spray opening is reduced; and because the spout is on the lateral wall of annular space, the opening direction of spout and the direction of flow of air current in annular space mutually perpendicular to make the residue can remain when dashing the terminal position of annular space, consequently can also eliminate the residue in the aerosol, reduce the residue volume that contains in the aerosol that spouts from the spout.

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 cross-sectional view of an aerosol fire extinguisher;

FIG. 4 is a cross-sectional view of the inner barrel;

FIG. 5 is a front view of the inner barrel;

fig. 6 is a sectional view taken along the line Y-Y in fig. 5.

In the figure: 1. a housing; 2. an inner barrel; 3. a heat-sensitive wire; 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 wire passing port; 15. mounting grooves;

21. a bottom wall; 22. a second side wall; 23. an exhaust port; 24. a convex ring;

41. a sensor body; 42. a lead wire;

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

231. a first exhaust port; 232. a second exhaust port.

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 nature of the present invention, and well-known methods, procedures, 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.

Referring to fig. 1-6, the invention provides an aerosol fire extinguisher used for extinguishing fire in a small space, in particular for extinguishing fire in an electric control cabinet and a battery charging box. The aerosol fire extinguisher comprises an inner cylinder 2 and a shell 1 arranged outside the inner cylinder 2, wherein the shell 1 comprises a top wall 11 and a first side wall 12 extending downwards from the top wall 11, namely, an opening of the shell is positioned at the lower end of the first side wall 12, namely, the lower end opening of the first side wall 12; the inner cylinder 2 includes a bottom wall 21 and a second side wall 22 extending upward from the bottom wall 21, the bottom wall 21 covers the lower port of the first side wall 12, the second side wall 22 abuts against the top wall 11, and an annular space 7 is formed between the second side wall 22 and the first side wall 12.

Referring to fig. 4, in the direction from the top wall 11 to the bottom wall 21, the second side wall 22 is divided into a first ring belt region 221, a second ring belt region 222 and a third ring belt region 223 in sequence, the second ring belt region 222 is provided with a plurality of exhaust ports 23 arranged along the circumferential direction, and the exhaust ports 23 penetrate through the second side wall 22 in the radial direction, that is, the exhaust ports 23 penetrate through the second side wall 22 in the thickness direction; the space enclosed by the third annular belt region 223 and the bottom wall 21 is provided with the fire extinguishing agent 5.

Referring to fig. 1 and 2, the aerosol fire extinguisher further comprises a heat-sensitive wire 3, one end of the heat-sensitive wire 3 is inserted into the fire extinguishing agent 5, the heat-sensitive wire 3 passes through one of the exhaust ports 23, and goes around the circumferential direction of the second side wall 22 in the annular space 7 to pass through the wire passing port 14 of the first side wall 12, and the wire passing port 14 is located at the lower part of the first side wall 12 and penetrates through the lower edge of the first side wall 12.

The first side wall 12 is provided with a plurality of nozzles 13, the plurality of nozzles 13 are distributed on the circumference of the first side wall 12, and the nozzles 13 are opposite to the third annular zone 223 in the radial direction, so that aerosol generated after the fire extinguishing agent 5 is ignited by the heat-sensitive wire is sprayed to the top wall 11, rebounds to the fire extinguishing agent 5 through the top wall 11, sequentially passes through the exhaust port 23 and the annular space 7, and finally is sprayed out from the nozzles 13.

Referring to fig. 1 and 2, the "upper" and "lower" in the present invention are only described in the positions shown in the drawings, and are relative positions defined for convenience of description, and the orientation of the aerosol fire extinguisher during use or processing is not limited, and the relative position of the inner barrel 2 and the housing 1 may be specifically determined according to the placement state of the aerosol fire extinguisher, for example, the top wall 11 is upper, the bottom wall 21 is lower, the first side wall 12 is formed by extending the top wall 11 downwards, and the second side wall 22 is formed by extending the bottom wall 21 upwards; if the top wall 11 is at the bottom and the bottom wall 21 is at the top, the first side wall 12 is formed by the top wall 11 extending upward and the second side wall 22 is formed by the bottom wall 21 extending downward, of course, the top wall 11 may be at the left and the bottom wall 21 at the right, or the top wall 11 may be at the right and the bottom wall 21 at the left. In the present invention, for convenience of describing the positional relationship between the inner cylinder 2 and the outer casing 1, the inner cylinder 2 is located at the bottom, the outer casing 1 is located at the top, and the outer casing 1 is sleeved on the outer side of the second side wall 22 of the inner cylinder 2 from the top to the bottom.

The top wall 11 and the bottom wall 21 are both flat plate structures, the first side wall 12 and the second side wall 22 are formed by surrounding a circle by a collar in the vertical direction, and are cylindrical structures, such as cylindrical structures, but also can be cylindrical structures of other shapes, the upper end of the first side wall 12 is connected with the top wall 11 to form the housing 1, and the lower end opening of the first side wall 12 forms a lower port; the lower end of the second side wall 22 is connected with the bottom wall 21 to form the inner cylinder 2, the upper end opening of the second side wall 22 forms an upper port, the first side wall 12 surrounds the second side wall 22 from the outside, and the lower port of the first side wall 12 is covered by the bottom wall 21, that is, the lower port of the first side wall 12 is closed by the bottom wall 21, the upper port of the second side wall 22 is abutted to the top wall 11, that is, the upper port of the second side wall 22 is attached to the top wall 11, even closed by the top wall 11, and meanwhile, the lower end of the second side wall 22 is connected with the bottom wall 21, so that the lower end of the second side wall 22 is closed by the bottom wall 21, and both the upper end and the lower end of the inner cylinder space 6 surrounded by the second side wall 22 are closed. The first side wall 12 is located outside (in the radial direction) the second side wall 22 such that an annular space 7 is formed between the first side wall 12 and the second side wall 22, the upper side of the annular space 7 being the top wall 11 and the lower side being the bottom wall 21.

Referring to fig. 3 and 4, the second side wall 22 is divided into a first annular zone 221, a second annular zone 222 and a third annular zone 223 from top to bottom, a plurality of exhaust ports 23 are arranged on the second annular zone 222 along the circumferential direction thereof, the inner cylinder space 6 is mainly communicated with the annular space 7 through the exhaust ports 23 (the upper port of the second side wall 22 is substantially sealed by the top wall 11, or the inner cylinder space 6 is substantially communicated with the annular space 7 through the exhaust ports 23), a fire extinguishing agent 5 is arranged in the inner cylinder space 6, the fire extinguishing agent 5 is arranged in the space surrounded by the third annular zone 223, so that the fire extinguishing agent 5 avoids the exhaust ports 23 of the second annular zone 222, the fire extinguishing agent 5 can be a block-shaped fire extinguishing agent, and the fire extinguishing agent 5 is preferably a block-shaped fire extinguishing agent 5 which adopts a compact structure, the shape of the fire extinguishing agent 5 is adapted to the space surrounded by the third annular zone 223, thereby maximizing the capacity of the fire extinguishing agent 5 in the limited volume, improving the total amount of aerosol released after the fire extinguishing agent 5 burns, and improving the fire extinguishing effect.

The fire extinguishing agent 5 can be wrapped in the silica gel shell, the upper side of the silica gel shell is open, so that the fire extinguishing agent 5 can be ignited from the upper end face of the silica gel shell, and the silica gel shell is accommodated in a space surrounded by the third annular belt area 223; preferably, the fire extinguishing agent 5 is not coated with a silica gel shell on the outside, but the exposed fire extinguishing agent 5 is directly disposed in the space surrounded by the third annular belt area 223, so as to further maximize the volume of the fire extinguishing agent 5, thereby increasing the total mass of the fire extinguishing agent 5 and the total release amount of the aerosol of the fire extinguishing agent 5 released later.

Preferably, the exhaust port 23 may penetrate the entire second belt region 222 in the up-down direction, that is, the portion of the second sidewall 22 located above the exhaust port 23 is the first belt region 221, the portion located below the exhaust port 23 is the third belt region 223, and the portion of the region where the exhaust port 23 is located is the second belt region 222. Thereby allowing the size of the vent 23 to be relatively large and preventing debris in the aerosol from clogging the vent 23.

Of course, the exhaust port 23 may not penetrate the second ring belt region 222 in the up-down direction.

The first side wall 12 is provided with a plurality of nozzles 13, aerosol in the inner cylinder space 6 finally enters the annular space 7 from the exhaust port 23 and is sprayed out from the nozzles 13 through the annular space 7, and the purpose of fire extinguishing is achieved.

In the radial direction of the inner barrel 2, the spray opening 13 is opposite to the third annular belt area 223, that is, the spray opening is located at the radial outer side of the third annular belt area, the spray opening 23 is located at the upper part and the spray opening 13 is located at the lower part, after the aerosol sprayed from the spray opening 23 enters the annular space 7, the aerosol needs to flow from the top to the bottom along the side wall of the annular space 7 and is finally sprayed from the spray opening 13, the flow path of the aerosol in the fire extinguisher is increased, and the temperature of the aerosol sprayed from the spray opening 13 is reduced.

The prior art also provides for the annular space 7 to be provided with a coolant, which can also be provided in the annular space 7 in the aerosol fire extinguisher according to the invention, but preferably no further coolant is provided in the annular space 7. When the aerosol flows in the annular space 7, the coolant in the annular space 7 can cool the aerosol, but can also block the flow of the aerosol at the same time, and the flow and the spraying speed of the aerosol sprayed from the nozzle 13 are influenced, so that the fire extinguishing effect is influenced.

During assembly, the heat-sensitive wire 3 can firstly pass through the exhaust port 23, then one end of the heat-sensitive wire 3 is inserted into the fire extinguishing agent 5, the fire extinguishing agent 5 is arranged in a space surrounded by the third annular zone 223, the heat-sensitive wire 3 is wound along the circumferential direction of the second side wall 22, then the outer shell 1 is assembled to the outer side of the inner barrel 2 from top to bottom, and the heat-sensitive wire 3 is aligned to the wire passing port 14 on the first side wall 12, so that the aerosol fire extinguisher is conveniently assembled and formed.

The thermosensitive wire 3 is close to a circle or more around the circumference of the second side wall 22, so that when the thermosensitive wire 3 is pulled outwards from the outside, one end of the thermosensitive wire 3 is always inserted into the fire extinguishing agent 5, one end of the thermosensitive wire 3 is not separated from the fire extinguishing agent 5, and the fire extinguishing agent 5 can be ignited normally by the thermosensitive wire 3.

In the invention, the inner cylinder 2 and the shell 1 adopt mutually sleeved and matched structures, and only an annular space for arranging a thermosensitive wire is reserved between the inner cylinder and the shell, so that the shell has smaller volume under the condition of certain volume of the inner cylinder, thereby being applicable to occasions without enough space for installing large-size aerosol fire extinguishers, such as small spaces of battery boxes and the like, and meeting the requirement of small volume of the fire extinguishers. In addition, the fire extinguishing agent adopts compact massive fire extinguishing agent, promotes the quality of filling of fire extinguishing agent, and then has promoted the total amount of the aerosol that releases after the fire extinguishing agent burns. According to the invention, the relatively closed inner barrel space 6 is formed, 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 rebounded to the combustion position of the fire extinguishing agent 5, another part of the aerosol is sprayed to the top wall 11 and then is diffused outwards from inside to outside along the radial direction of the top wall 11, when the aerosol reaches the first annular zone 221, the aerosol is blocked by the first annular zone 221, the aerosol flows downwards along the first annular zone 221 (the second side wall 22) and also reaches the combustion position of the fire extinguishing agent 5, the two parts of the aerosol rapidly increase the combustion pressure at the combustion position of the fire extinguishing agent 5, the combustion rate and efficiency of the fire extinguishing agent 5 are improved due to the increase of the combustion pressure, the injection amount of the aerosol per unit time is improved, and the fire extinguishing agent 5 can be combusted and release the aerosol in a shorter time (the fire extinguishing agent 5 can be released in 3 s) After the fire is completely burnt), the purpose of releasing a large amount of aerosol in a short time is realized, and the fire extinguishing effect of the fire extinguisher provided with the block-shaped fire extinguishing agent 5 is improved; moreover, the aerosol is sprayed out from the air outlet 23 and is sprayed on the first side wall 12, and flows downwards in the annular space 7 under the guidance of the first side wall 12 and the second side wall 22, and then is sprayed out from the nozzle 13 on the side surface transversely, namely is sprayed out from the nozzle 13 along the direction vertical to the original path after passing through the annular space, so that 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 nozzle is reduced; simultaneously, increased the combustion pressure of fire extinguishing agent 5 burning department, make fire extinguishing agent 5 can be burnt fully, the release total amount of aerosol has been increased, the residue volume in the aerosol has also been reduced, moreover, the aerosol is spouted on first lateral wall 12 with nearly vertical direction from gas vent 23, residue in the aerosol can strike the bonding on first lateral wall 12, the aerosol is also spouted on diapire 21 with nearly vertical direction from last downwards in the annular space, make the residue in the aerosol also can remain in the bottom of annular space, thereby the residue volume that contains in the aerosol of final follow spout blowout has been reduced.

Preferably, the ratio of the axial length of the jet 13 to the axial length of the third annulus 223 in the axial direction of the inner barrel 2 is 0.25 to 0.3, the axial middle of the jet 13 and the third annulus 223 corresponding.

The length of the nozzle 13 in the up-down direction (the aforementioned axial direction) is much smaller than that of the third annular belt region 223, and the nozzle 13 corresponds to the axial middle portion of the third annular belt region 223 such that the distance between the upper edges of the nozzle 13 and the third annular belt region 223 and the distance between the lower edges of the nozzle 13 and the third annular belt region 223 in the up-down direction are substantially equal, thereby forming an annular groove that opens upward in the portion of the annular space 7 below the nozzle 13. 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 nozzle. In addition, the annular groove is arranged to store a certain amount of residues.

Preferably, the number of the exhaust ports 23 is equal to the number of the nozzles 13, and the exhaust ports 23 and the nozzles 13 are in one-to-one correspondence, and the positions of the corresponding exhaust ports 23 and the corresponding nozzles 13 are the same in the circumferential direction of the aerosol fire extinguisher, that is, a group of the corresponding exhaust ports and the corresponding nozzles are in the same radial direction, but the exhaust ports are located above in the axial direction, and the nozzles are located below.

One air outlet 23 corresponds to one nozzle 13, and the corresponding air outlet 23 and the corresponding nozzle 13 are that the air outlet 23 is positioned right above the nozzle 13, so that aerosol sprayed from each air outlet 23 is finally and basically sprayed from the corresponding nozzle 13 after passing through the annular space 7, the paths of the aerosol sprayed from each air outlet 23 in the aerosol fire extinguisher are basically the same, the total amount and the spraying speed of the aerosol sprayed from each nozzle 13 are ensured to be basically equal, and the aerosol fire extinguisher can effectively spray the aerosol to the peripheral space of the aerosol fire extinguisher, thereby achieving the purpose of fire extinguishing.

Preferably, the plurality of nozzles 13 are uniformly distributed along the circumferential direction of the first side wall 12, so that the aerosol fire extinguisher can uniformly spray the aerosol outwards at the circumferential side, and the fire extinguishing effect of the aerosol fire extinguisher is ensured.

In another preferred embodiment, the plurality of exhaust ports 23 includes at least one first exhaust port 231 and a plurality of second exhaust ports 232, the number of the second exhaust ports 232 may be 3, 4, 5, 6, 7 or 8, the circumferential length of the first exhaust port 231 is greater than the circumferential length of the second exhaust port 232, one first exhaust port 231 corresponds to the positions of two nozzle holes 13 and one second exhaust port 232 corresponds to the position of one nozzle hole 13 in the axial direction of the aerosol fire extinguisher; the heat-sensitive wire 3 passes through the first exhaust port 231.

The size of the first exhaust port 231 is larger than that of the second exhaust port 232, the larger size of the first exhaust port 231 also facilitates the passing of the heat-sensitive wire 3, and facilitates the assembly of the aerosol fire extinguisher, and "one first exhaust port 231 corresponds to the positions of two nozzle holes 13" means that the center positions of the two nozzle holes 13 are located within the range of the first exhaust port 231 in the circumferential direction of the aerosol fire extinguisher, and one second exhaust port 232 corresponds to the position of one nozzle hole 13, so that each nozzle hole 13 can correspond to one exhaust port 23, and thus, the aerosol sprayed from the first exhaust port 231 is finally and substantially sprayed from the corresponding two nozzle holes 13 through the annular space 7, and the aerosol sprayed from the second exhaust port 232 is finally and substantially sprayed from the corresponding one nozzle hole 13 through the annular space 7.

The exhaust ports 23 are spaced apart from the exhaust ports 23, that is, any two exhaust ports 23 are not communicated with each other regardless of the number of the first exhaust ports 231 and the number of the second exhaust ports 232.

Referring to fig. 5 and 6, the number of the nozzle holes 13 may be eight, eight nozzle holes 13 are uniformly distributed along the circumferential direction of the first sidewall 12, the number of the first exhaust ports 231 is two, the number of the second exhaust ports 232 is four, six exhaust ports 23 are distributed along the circumferential direction of the second sidewall 22, and two second exhaust ports 232 are arranged between two first exhaust ports 231 in the circumferential direction of the second sidewall 22.

Of course, the number of the nozzle holes 13 may be six, the number of the first exhaust ports 231 is two, the number of the second exhaust ports 232 is also two, and one second exhaust port 232 is located between two first exhaust ports 231 in the circumferential direction of the second sidewall 22, that is, both sides of any one first exhaust port 231 are the second exhaust ports 232.

Preferably, with reference to fig. 4, in the axial direction of the inner tube 2, the ratio of the axial length of the third belt region 223 to the sum of the axial lengths of the first belt region 221 and the second belt region 222 is from 3.5 to 4.2, and the ratio of the axial length of the second belt region 222 to the axial length of the first belt region 221 is from 1.8 to 2.2.

The first belt region 221 has an axial length a, the second belt region 222 has an axial length B, the third belt region 223 has an axial length C,

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 second annulus 222 to the axial length of the first annulus 221 is 1.8-2.2" 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 the aerosol and prevent debris in the aerosol from clogging the exhaust port 23.

Preferably, the shape of the exhaust port 23 is rectangular, the axial length of the second ring belt region 222 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 outer side of the first ring belt region 221 is provided with an outwardly convex ring 24, and the convex ring 24 is in clearance fit with the first side wall 12.

The collar 24 is located in the first annular band region 221, i.e. the collar 24 is located above the exhaust opening 23, so that the collar 24 does not interfere with the flow of aerosol ejected from the exhaust opening 23 in the annular space 7. After the outer shell 1 and the inner cylinder 2 are assembled, the lower side of the first side wall 12 is clamped with the bottom wall 21, and meanwhile, the upper side of the inner cylinder 2 is in clearance fit with the first side wall 12 through the convex ring 24, so that the upper part and the lower part of the inner cylinder 2 are limited, and the inner cylinder 2 is connected with the outer shell 1 relatively stably.

The clearance between the collar 24 and the first side wall 12 is no more than 0.5 mm.

The whole first ring belt region 221 protrudes outward to form the convex ring 24, the height of the convex ring 24 in the vertical direction is the same as that of the first ring belt region 221, the upper end face of the convex ring 24 is flush with the upper end face of the first ring belt region 221, and the lower end face of the convex ring 24 is flush with the lower end face of the first ring belt region 221.

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

Preferably, be equipped with joint structure (not shown in the figure) on the diapire 21, be equipped with on the first lateral wall 12 with joint structure matched with draw-in groove (not shown in the figure), joint structure and draw-in groove joint to make inner tube 2 and shell 1 interconnect.

When assembling this aerosol fire extinguisher, from last down the cover with shell 1 establish the outside at inner tube 2, after shell 1 and inner tube 2 assembly target in place (diapire 21 lid closes the lower port of first lateral wall 12), joint structure and draw-in groove joint for shell 1 and inner tube 2 reciprocal anchorage form aerosol fire extinguisher.

Preferably, referring to fig. 3, the aerosol fire extinguisher further comprises a sensor 4 for detecting whether the fire extinguishing agent 5 is burnt, the lower side surface of the top wall 11 is provided with a mounting groove 15, the body portion of the sensor 4 is embedded in the mounting groove 15 and partially exposed out of the mounting groove 15, and a lead 42 of the sensor 4 passes through one of the exhaust ports 23, passes through the annular space 7 and passes out of the wire passing port 14.

The mounting groove 15 does not penetrate through the top wall 11, so that when the sensor body 41 is embedded in the mounting groove 15, people cannot directly observe the sensor body 41 from the outside, the sensor body 41 and the mounting groove 15 can be in interference fit to ensure that the position of the sensor body 41 relative to the mounting groove 15 is not changed, and the sensor body 41 and the mounting groove 15 can be connected in a bonding manner to ensure that one front 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 lead 42 of the sensor 4 passes through one exhaust port 23, preferably, the exhaust port 23 through which the lead 42 of the sensor 4 passes and the exhaust port 23 through which the thermosensitive wire 3 passes are the same exhaust port 23, then the shell 1 and the inner barrel 2 are assembled, meanwhile, the lead 42 of the sensor 4 is arranged at the position of the wire passing port 14 on the shell 1, after the shell 1 is clamped with the inner barrel 2, the lead 42 of the sensor 4 is pulled outwards until the lead 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 lead 42 is pulled outwards. The lead 42 of the sensor 4 is used for externally connecting a circuit board to externally transmit a temperature signal detected by the sensor 4.

The sensor 4 can be a sensor for detecting temperature, when the fire extinguishing agent 5 burns, high-temperature aerosol is released, and the high-temperature aerosol 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, which indicates that a fire condition exists at the position of the aerosol fire extinguisher, wherein the set temperature is 150 ℃, 160 ℃, 170 ℃ or 180 ℃.

The whole aerosol fire extinguisher is cylindrical, namely the top wall 11 and the bottom wall 21 are both circular, and the volume of the whole aerosol fire extinguisher is not more than 60cm³So that it can be applied to a small space. In addition, in the radial direction of the aerosol fire extinguisher, the radial length of the annular space 7 is not more than 3mm, the inner cylinder space 6 is cylindrical, and the radius of the inner cylinder space is not less than 14mm, so that most of the space inside the aerosol fire extinguisher is used for filling the fire extinguishing agent 5, the filling amount of the fire extinguishing agent 5 is increased, and the fire extinguishing effect is ensured.

Preferably, the inner cylinder 2 and the outer shell 1 are both made of nylon plastics. When the aerosol fire extinguisher is applied to an electric appliance, because the risk of the fire extinguishing agent 5 being ignited by the electric arc is existed outside the aerosol fire extinguisher, the external electric arc can be effectively isolated through the inner cylinder 2 and the shell 1 which are made of nylon plastics, and the situation of the fire extinguishing agent 5 being ignited by mistake is prevented; meanwhile, the inner cylinder 2 and the outer shell 1 made of nylon plastics can isolate the influence of the outside temperature on the fire extinguishing agent.

It will be understood that the embodiments described above are illustrative only and not restrictive, and that various obvious and equivalent modifications and substitutions for details described herein may be made 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 and a shell arranged outside the inner cylinder, wherein the shell comprises a top wall and a first side wall extending downwards from the top wall; the inner cylinder comprises a bottom wall and a second side wall extending upwards from the bottom wall, the bottom wall covers the lower port of the first side wall, the second side wall is abutted to the top wall, and an annular space is formed between the second side wall and the first side wall;

2. An aerosol fire extinguisher as claimed in claim 1, wherein the nozzle orifice corresponds to an axially middle or lower portion of the third annulus region in an axial direction of the inner barrel.

3. An aerosol fire extinguisher as claimed in claim 1, wherein the number of said exhaust ports is equal to the number of said nozzles and corresponds one to one, and the positions of said exhaust ports and said nozzles are the same in the circumferential direction of said aerosol fire extinguisher.

4. An aerosol fire extinguisher according to claim 1, wherein the plurality of exhaust ports include at least one first exhaust port and a plurality of second exhaust ports, the circumferential length of the first exhaust port being greater than the circumferential length of the second exhaust port, one first exhaust port corresponding to the positions of two nozzle orifices and one second exhaust port corresponding to the positions of one nozzle orifice in the axial direction of the aerosol fire extinguisher; the heat-sensitive wire passes through the first exhaust port.

5. An aerosol fire extinguisher as claimed in any one of claims 1 to 4, wherein the ratio of the axial length of the nozzle orifice to the axial length of the third annulus is from 0.25 to 0.3, the ratio of the axial length of the third annulus to the sum of the axial lengths of the first and second annuli is from 3.5 to 4.2, and the ratio of the axial length of the second annulus to the axial length of the first annulus is from 1.8 to 2.2, in the axial direction of the inner barrel.

6. An aerosol fire extinguisher as claimed in claim 5, wherein the outlet is rectangular in shape, the second annulus region has an axial length of 2.5-3.5mm and the outlet has a circumferential length of at least 8mm in the circumferential direction of the inner barrel.

7. An aerosol fire extinguisher as claimed in any one of claims 1 to 4, wherein the outer side of the first annular band region is provided with an outwardly projecting collar which is in clearance fit with the first side wall.

8. An aerosol fire extinguisher as claimed in any one of claims 1 to 7, wherein the bottom wall is provided with a snap fit structure, the first side wall is provided with a snap fit groove which is engaged with the snap fit structure, and the snap fit structure is snap fitted with the snap fit groove to interconnect the inner barrel and the outer housing.

9. An aerosol fire extinguisher as claimed in any one of claims 1 to 7, further comprising a sensor for detecting whether the fire extinguishing agent is burning, the underside of the top wall being provided with a mounting slot, a body portion of the sensor being partially embedded in the mounting slot and partially exposed from the mounting slot, and a lead of the sensor passing through one of the exhaust ports and through the annular space to exit from the line passing port.

10. An aerosol fire extinguisher as claimed in any one of claims 1 to 9, wherein both the inner barrel and the outer housing are made of nylon plastics.