CN220070577U - Aerosol fire extinguishing device capable of improving diffusion capacity and reducing nozzle temperature - Google Patents

Aerosol fire extinguishing device capable of improving diffusion capacity and reducing nozzle temperature Download PDF

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CN220070577U
CN220070577U CN202320708714.2U CN202320708714U CN220070577U CN 220070577 U CN220070577 U CN 220070577U CN 202320708714 U CN202320708714 U CN 202320708714U CN 220070577 U CN220070577 U CN 220070577U
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aerosol
nozzle temperature
enhancing
set forth
reducing nozzle
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付成
王祺
陈艳
万宇
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Hubei Jiandun Fire Technology Co Ltd
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Hubei Jiandun Fire Technology Co Ltd
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Abstract

The utility model discloses an aerosol fire extinguishing device capable of improving the diffusion capacity and reducing the nozzle temperature, which comprises an outer cylinder and an aerosol generating agent arranged in the outer cylinder, wherein one end of the aerosol generating agent is connected with the tail end of a starting part, the upper end of the outer cylinder is provided with an annular spraying cavity, and the side wall of the annular spraying cavity is provided with an air inlet; according to the utility model, the annular spraying cavity and the air inlet are arranged, so that the diffusion capacity of fire extinguishing substances can be effectively improved, and the nozzle temperature can be reduced.

Description

一种可提高扩散能力和降低喷口温度的气溶胶灭火装置An aerosol fire extinguishing device that can increase diffusion capacity and reduce nozzle temperature

技术领域Technical field

本实用新型涉及消防技术领域,具体地指一种可提高扩散能力和降低喷口温度的气溶胶灭火装置。The utility model relates to the field of fire protection technology, and specifically refers to an aerosol fire extinguishing device that can improve the diffusion capacity and reduce the temperature of the nozzle.

背景技术Background technique

气溶胶灭火装置在密闭空间或半密闭空间内主要是通过全淹没灭火,因此灭火装置是否能让气溶胶灭火剂迅速充斥在整个保护空间内成为了灭火装置能否迅速灭火的关键。Aerosol fire extinguishing devices mainly extinguish fires by total flooding in confined or semi-confined spaces. Therefore, whether the fire extinguishing device can quickly fill the entire protective space with aerosol fire extinguishing agent has become the key to whether the fire extinguishing device can quickly extinguish the fire.

传统气溶胶灭火装置喷放时都存在喷口温度过高的问题,如果不能有效控制喷口温度则有可能对保护空间内的其他财产造成二次伤害,传统的冷却方式主要为物理冷却剂(及石子、铁削等吸热物质)冷却效率低,导致装置体积过大,大体积的灭火装置配合冷却剂会使装置的喷放强度,灭火物质的扩散能力均有所下降。When traditional aerosol fire extinguishing devices are sprayed, there is a problem that the nozzle temperature is too high. If the nozzle temperature cannot be effectively controlled, it may cause secondary damage to other properties in the protected space. The traditional cooling method mainly uses physical coolants (and stones). , iron cuttings and other heat-absorbing substances), the cooling efficiency is low, resulting in the device being too large. The large-volume fire extinguishing device combined with the coolant will reduce the spray intensity of the device and the diffusion ability of the fire extinguishing material.

因此亟待需要一种可提高扩散能力和降低喷口温度的气溶胶灭火装置。Therefore, there is an urgent need for an aerosol fire extinguishing device that can improve the diffusion capacity and reduce the temperature of the nozzle.

实用新型内容Utility model content

本实用新型的目的在于克服上述不足,提供一种可提高扩散能力和降低喷口温度的气溶胶灭火装置,能够提高灭火物质的扩散能力,并降低喷口温度。The purpose of this utility model is to overcome the above-mentioned shortcomings and provide an aerosol fire extinguishing device that can improve the diffusion capacity and reduce the temperature of the nozzle, and can improve the diffusion capacity of fire extinguishing substances and reduce the temperature of the nozzle.

本实用新型为解决上述技术问题,所采用的技术方案是:一种可提高扩散能力和降低喷口温度的气溶胶灭火装置,包括外筒和设于外筒内部的气溶胶发生剂,气溶胶发生剂一端与启动部件末端连接,所述外筒上端设有环形喷放腔体,所述环形喷放腔体侧壁开设有进气口。In order to solve the above technical problems, the technical solution adopted by this utility model is: an aerosol fire extinguishing device that can improve the diffusion capacity and reduce the temperature of the nozzle, including an outer cylinder and an aerosol generating agent located inside the outer cylinder. One end of the agent is connected to the end of the starting component, the upper end of the outer cylinder is provided with an annular spray cavity, and the side wall of the annular spray cavity is provided with an air inlet.

优选地,所述环形喷放腔体包括与外筒上端固定连接的外壳体,所述外壳体内部设有内壳体,所述外壳体上下两端开放,所述内壳体顶部开放,底部设有底盖,外壳体与内壳体的侧壁开设进气口。Preferably, the annular spray cavity includes an outer shell fixedly connected to the upper end of the outer cylinder, an inner shell is provided inside the outer shell, the upper and lower ends of the outer shell are open, the top of the inner shell is open, and the bottom is open. A bottom cover is provided, and air inlets are provided on the side walls of the outer shell and the inner shell.

优选地,所述底盖通过支撑杆与筛板固定连接,所述筛板外缘与外筒内壁固定连接,筛板表面开设有筛孔。Preferably, the bottom cover is fixedly connected to the sieve plate through a support rod, the outer edge of the sieve plate is fixedly connected to the inner wall of the outer cylinder, and a sieve hole is provided on the surface of the sieve plate.

优选地,所述筛板与气溶胶发生剂之间还设有冷却剂,所述启动部件为电点火头或热敏线结构。Preferably, a coolant is provided between the sieve plate and the aerosol generating agent, and the starting component is an electric ignition head or a thermal wire structure.

优选地,所述启动部件末端设有防护罩网,所述防护罩网外侧与筛板之间设置冷却剂。Preferably, a protective cover net is provided at the end of the starting component, and a coolant is provided between the outside of the protective cover net and the screen plate.

优选地,所述冷却剂内部还设有多个隔网,隔网之间设有分隔柱。Preferably, the coolant is also provided with a plurality of partitions inside, and separation columns are provided between the partitions.

优选地,所述底盖表面还开设有泄压孔,所述外壳体顶部和内壳体顶部均为弧面结构。Preferably, the surface of the bottom cover is also provided with a pressure relief hole, and the top of the outer shell and the top of the inner shell are both curved structures.

优选地,所述泄压孔内还设有泄压膜片。Preferably, a pressure relief diaphragm is also provided in the pressure relief hole.

优选地,所述气溶胶发生剂为药柱结构,其表面设有用于隔热的硅胶套。Preferably, the aerosol generating agent has a grain column structure, and a silicone sleeve for heat insulation is provided on its surface.

优选地,所述外筒下端设置有与其螺纹配合的后盖,所述后盖开设有用于穿设启动部件的通孔。Preferably, the lower end of the outer cylinder is provided with a back cover that is threadedly matched with the outer cylinder, and the back cover is provided with a through hole for inserting a starting component.

本实用新型的有益效果:Beneficial effects of this utility model:

本实用新型通过设置环形喷放腔体及进气口,能够有效提高灭火物质的扩散能力,并降低喷口温度。By arranging an annular spray cavity and an air inlet, the utility model can effectively improve the diffusion capacity of fire extinguishing substances and reduce the temperature of the nozzle.

附图说明Description of drawings

图1为一种可提高扩散能力和降低喷口温度的气溶胶灭火装置的内部结构示意图;Figure 1 is a schematic diagram of the internal structure of an aerosol fire extinguishing device that can improve diffusion capacity and reduce nozzle temperature;

图2为一种可提高扩散能力和降低喷口温度的气溶胶灭火装置的结构示意图。Figure 2 is a schematic structural diagram of an aerosol fire extinguishing device that can improve diffusion capacity and reduce nozzle temperature.

具体实施方式Detailed ways

下面结合附图和具体实施例对本实用新型作进一步的详细描述。The utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

如图1和2所示,一种可提高扩散能力和降低喷口温度的气溶胶灭火装置,包括外筒1和设于外筒1内部的气溶胶发生剂2,气溶胶发生剂2一端与启动部件3末端连接,所述外筒1上端设有环形喷放腔体4,所述环形喷放腔体4侧壁开设有进气口5。在本实施例中,当启动部件3点燃气溶胶发生剂2时,产生大量灭火物质(气溶胶或气体),然后从环形喷放腔体4喷出,在气流从环形喷放腔体4顶部喷出时,形成射流,使得环形喷放腔体4内部产生负压,从而使得环形喷放腔体4外的空气顺着进气口5进入到环形喷放腔体4内部,通过进气口5涌入大量空气后,一方面空气的流动对喷口所在区域起到散热降温作用,降低了喷口温度,另一方面,这使得灭火装置附近空气流速增加,从而增强了灭火区域的空气流动性,让灭火介质迅速充斥在整个灭火空间内,从而能够实现快速灭火。As shown in Figures 1 and 2, an aerosol fire extinguishing device that can improve diffusion capacity and reduce nozzle temperature includes an outer cylinder 1 and an aerosol generating agent 2 located inside the outer cylinder 1. One end of the aerosol generating agent 2 is connected to the start-up The ends of the components 3 are connected. The upper end of the outer cylinder 1 is provided with an annular spray cavity 4, and the side wall of the annular spray cavity 4 is provided with an air inlet 5. In this embodiment, when the starting component 3 ignites the aerosol generating agent 2, a large amount of fire extinguishing substances (aerosol or gas) are generated, and then sprayed out from the annular spray chamber 4. When spraying, a jet is formed, causing a negative pressure inside the annular spray cavity 4, so that the air outside the annular spray cavity 4 enters the inside of the annular spray cavity 4 along the air inlet 5, and passes through the air inlet. 5 After a large amount of air is poured in, on the one hand, the flow of air plays a cooling role in the area where the nozzle is located, reducing the temperature of the nozzle. On the other hand, this increases the air flow rate near the fire extinguishing device, thereby enhancing the air mobility in the fire extinguishing area. Let the fire extinguishing medium quickly fill the entire fire extinguishing space, so that rapid fire extinguishing can be achieved.

优选地,所述环形喷放腔体4包括与外筒1上端固定连接的外壳体4.1,所述外壳体4.1内部设有内壳体4.2,所述外壳体4.1上下两端开放,所述内壳体4.2顶部开放,底部设有底盖4.3,外壳体4.1与内壳体4.2的侧壁开设进气口5。Preferably, the annular spray cavity 4 includes an outer shell 4.1 fixedly connected to the upper end of the outer cylinder 1. An inner shell 4.2 is provided inside the outer shell 4.1. The upper and lower ends of the outer shell 4.1 are open, and the inner shell 4.1 is open. The top of the housing 4.2 is open, a bottom cover 4.3 is provided at the bottom, and an air inlet 5 is provided on the side walls of the outer housing 4.1 and the inner housing 4.2.

优选地,所述底盖4.3通过支撑杆6与筛板7固定连接,所述筛板7外缘与外筒1内壁固定连接,筛板7表面开设有筛孔。在本实施例中,支撑杆6支撑筛板7也可以形成一定缓冲区域。另外筛板7也可以防止下方的冷却剂9向上喷出而堵塞环形喷放腔体4Preferably, the bottom cover 4.3 is fixedly connected to the screen plate 7 through the support rod 6, the outer edge of the screen plate 7 is fixedly connected to the inner wall of the outer cylinder 1, and the screen plate 7 is provided with screen holes on its surface. In this embodiment, the support rod 6 supports the screen plate 7 and can also form a certain buffer area. In addition, the screen plate 7 can also prevent the coolant 9 below from spraying upward and blocking the annular spray cavity 4

优选地,所述筛板7与气溶胶发生剂2之间还设有冷却剂9,所述启动部件3为电点火头或热敏线结构。冷却剂9可以对通过的灭火物质进行降温过程,防止喷口区域温度过高;另外在本实施例中,当启动部件3为电点火头结构时,其与火灾探测装置连接,火灾探测装置为温度传感器和/或烟雾传感器,当有火灾、过热等情况发生时,火灾探测装置检测到外部因火灾而产生高温环境后,发出信号给微处理器,微处理器控制启动部件3将气溶胶发生剂2点燃。而当启动部件3为热敏线结构时,火灾发生后,高温或火焰可以直接引燃热敏线,最终直接点燃气溶胶发生剂2,无需搭配额外的火灾探测装置及其他外接设备。Preferably, a coolant 9 is provided between the sieve plate 7 and the aerosol generating agent 2, and the starting component 3 is an electric ignition head or a thermal wire structure. The coolant 9 can cool down the passing fire extinguishing material to prevent the temperature in the nozzle area from being too high; in addition, in this embodiment, when the starting component 3 is an electric ignition head structure, it is connected to the fire detection device, and the fire detection device is a temperature sensor. sensor and/or smoke sensor. When a fire, overheating, etc. occurs, the fire detection device detects the high temperature environment caused by the fire outside and sends a signal to the microprocessor. The microprocessor controls the starting component 3 to generate the aerosol generating agent. 2 lit. When the starting component 3 is a thermal wire structure, after a fire occurs, the high temperature or flame can directly ignite the thermal wire, and ultimately directly ignite the aerosol generating agent 2, without the need for additional fire detection devices and other external equipment.

优选地,所述启动部件3末端设有防护罩网10,所述防护罩网10外侧与筛板7之间设置冷却剂9。这样设计后防护罩网10能够形成一个保护罩,将启动部件3(热敏线或点火头)末端保护起来,启动时冷却剂9便不会削减其能量,有效避免灭火装置无法启动的现象。Preferably, a protective cover net 10 is provided at the end of the starting component 3 , and a coolant 9 is provided between the outside of the protective cover net 10 and the screen plate 7 . After being designed in this way, the protective cover net 10 can form a protective cover to protect the end of the starting component 3 (thermal wire or ignition head). The coolant 9 will not reduce its energy when starting, effectively preventing the fire extinguishing device from being unable to start.

优选地,所述冷却剂9内部还设有多个隔网11,隔网11之间设有分隔柱12。通过分隔柱12可以在冷却剂9内支撑分隔出缓冲空间,一方面可以对气溶胶发生剂2产生的气溶胶灭火物质产生缓冲作用,另一方面增大了冷却剂9与气溶胶灭火物质的接触面积,提高了冷却效率。Preferably, the coolant 9 is also provided with a plurality of partitions 11 inside, and separation columns 12 are provided between the partitions 11 . The buffer space can be supported and separated in the coolant 9 by the dividing column 12. On the one hand, it can have a buffering effect on the aerosol fire-extinguishing material generated by the aerosol generating agent 2, and on the other hand, it can increase the distance between the coolant 9 and the aerosol fire-extinguishing material. Contact area improves cooling efficiency.

优选地,所述底盖4.3表面还开设有泄压孔13,所述外壳体4.1顶部和内壳体4.2顶部均为弧面结构。通过设置泄压孔13后,可以在灭火过程中,外筒1内部压力如果过大,可以通过泄压孔13排出,降低发生爆炸的风险;另外外壳体4.1顶部和内壳体4.2顶部均为弧面结构,这样可以使得环形喷放腔体4顶端形成向圆心收拢的曲面形状,从空气动力学角度来看,这无疑加快了灭火物质的喷放速度。Preferably, the surface of the bottom cover 4.3 is also provided with a pressure relief hole 13, and the top of the outer shell 4.1 and the inner shell 4.2 are both curved structures. After the pressure relief hole 13 is provided, during the fire extinguishing process, if the internal pressure of the outer cylinder 1 is too large, it can be discharged through the pressure relief hole 13 to reduce the risk of explosion; in addition, the top of the outer shell 4.1 and the top of the inner shell 4.2 are both The arc structure allows the top of the annular spray chamber 4 to form a curved shape that converges toward the center of the circle. From an aerodynamic point of view, this undoubtedly speeds up the discharge of fire extinguishing materials.

优选地,所述泄压孔13内还设有泄压膜片。通过在泄压孔13内部设置泄压膜片,这样在灭火装置启动时,如果喷放正常,这样环形喷放腔体4的底盖4.3呈封闭状态,这样能够保证气溶胶灭火物质能够顺着环形喷放腔体4喷出,发挥其散热及扩散作用,而当灭火装置内部压力骤增过大时,泄压膜片会因压力作用而发生破裂,从而灭火物质及时从泄压孔13排出,进行泄压过程,有效避免发生爆炸的风险。Preferably, the pressure relief hole 13 is also provided with a pressure relief diaphragm. By arranging a pressure relief diaphragm inside the pressure relief hole 13, when the fire extinguishing device is started, if the discharge is normal, the bottom cover 4.3 of the annular discharge chamber 4 will be in a closed state, thus ensuring that the aerosol fire extinguishing material can flow along the The annular spray cavity 4 sprays out to exert its heat dissipation and diffusion effects. When the internal pressure of the fire extinguishing device suddenly increases too much, the pressure relief diaphragm will rupture due to the pressure, so that the fire extinguishing material is discharged from the pressure relief hole 13 in time. , perform the pressure relief process to effectively avoid the risk of explosion.

优选地,所述气溶胶发生剂2为药柱结构,其表面设有用于隔热的硅胶套14。通过硅胶套14可以避免在灭火过程中外筒1温度过高的情况出现。Preferably, the aerosol generating agent 2 has a grain column structure, and a silicone sleeve 14 for heat insulation is provided on its surface. The silicone sleeve 14 can prevent the temperature of the outer cylinder 1 from being too high during the fire extinguishing process.

优选地,所述外筒1下端设置有与其螺纹配合的后盖8,所述后盖8开设有用于穿设启动部件3的通孔。Preferably, the lower end of the outer cylinder 1 is provided with a back cover 8 that is threadedly matched therewith, and the back cover 8 is provided with a through hole for inserting the activation component 3 .

本实施例工作原理如下:The working principle of this embodiment is as follows:

当外界发生火情时,启动部件3将气溶胶发生剂2引燃,本实施例中的气溶胶发生剂2为气溶胶发生剂压制而成的药柱,气溶胶发生剂2燃烧而产生灭火物质(如气溶胶或气体);灭火物质通过防护罩网10后,经过冷却剂9冷却后,通过筛板7的筛孔后,进入到环形喷放腔体4内,然后从环形喷放腔体4喷出,在气流从环形喷放腔体4顶部喷出时,形成射流,使得环形喷放腔体4内部产生负压,从而使得环形喷放腔体4外的空气顺着进气口5进入到环形喷放腔体4内部,通过进气口5涌入大量空气后,一方面空气的流动对喷口所在区域起到散热降温作用,降低了喷口温度,另一方面,这使得灭火装置附近空气流速增加,从而增强了灭火区域的空气流动性,让灭火介质迅速充斥在整个灭火空间内,从而能够实现快速灭火。When a fire occurs outside, the starting component 3 ignites the aerosol generating agent 2. The aerosol generating agent 2 in this embodiment is a grain column pressed by the aerosol generating agent. The aerosol generating agent 2 burns to cause fire extinguishing. Substances (such as aerosols or gases); after the fire-extinguishing substances pass through the protective cover net 10, they are cooled by the coolant 9, pass through the sieve holes of the sieve plate 7, enter the annular discharge chamber 4, and then exit from the annular discharge chamber When the airflow is ejected from the top of the annular spray cavity 4, a jet is formed, causing a negative pressure inside the annular spray cavity 4, so that the air outside the annular spray cavity 4 flows along the air inlet. 5 enters the annular spray cavity 4 and a large amount of air is poured in through the air inlet 5. On the one hand, the flow of air plays a cooling role in the area where the nozzle is located, reducing the temperature of the nozzle. On the other hand, this makes the fire extinguishing device The nearby air flow rate increases, thereby enhancing the air mobility in the fire extinguishing area, allowing the fire extinguishing medium to quickly fill the entire fire extinguishing space, thus enabling rapid fire extinguishing.

上述的实施例仅为本实用新型的优选技术方案,而不应视为对于本实用新型的限制,本申请中的实施例及实施例中的特征在不冲突的情况下,可以相互任意组合。本实用新型的保护范围应以权利要求记载的技术方案,包括权利要求记载的技术方案中技术特征的等同替换方案为保护范围。即在此范围内的等同替换改进,也在本实用新型的保护范围之内。The above-mentioned embodiments are only preferred technical solutions of the present utility model and should not be regarded as limitations of the present utility model. The embodiments and features in the embodiments of the present application can be arbitrarily combined with each other as long as there is no conflict. The protection scope of the present utility model shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present utility model.

Claims (10)

1. The utility model provides an aerosol extinguishing device that can improve diffusivity and reduce spout temperature, includes urceolus (1) and locates inside aerosol generating agent (2) of urceolus (1), aerosol generating agent (2) one end and start-up member (3) end-to-end connection, its characterized in that: the novel water heater is characterized in that an annular spraying cavity (4) is arranged at the upper end of the outer barrel (1), and an air inlet (5) is formed in the side wall of the annular spraying cavity (4).
2. An aerosol fire suppression apparatus for enhancing diffusing capacity and reducing nozzle temperature as set forth in claim 1 wherein: the annular spraying cavity (4) comprises an outer shell (4.1) fixedly connected with the upper end of the outer cylinder (1), an inner shell (4.2) is arranged inside the outer shell (4.1), the upper end and the lower end of the outer shell (4.1) are open, the top of the inner shell (4.2) is open, a bottom cover (4.3) is arranged at the bottom, and an air inlet (5) is formed in the side walls of the outer shell (4.1) and the inner shell (4.2).
3. An aerosol fire suppression apparatus for enhancing diffusing capability and reducing nozzle temperature as set forth in claim 2 wherein: the bottom cover (4.3) is fixedly connected with the sieve plate (7) through the supporting rod (6), the outer edge of the sieve plate (7) is fixedly connected with the inner wall of the outer cylinder (1), and sieve holes are formed in the surface of the sieve plate (7).
4. An aerosol fire suppression apparatus for enhancing diffusing capacity and reducing nozzle temperature as set forth in claim 3 wherein: a coolant (9) is also arranged between the sieve plate (7) and the aerosol generating agent (2), and the starting component (3) is an electric ignition head or a thermosensitive wire structure.
5. An aerosol fire suppression apparatus for enhancing diffusing capacity and reducing nozzle temperature as set forth in claim 4 wherein: the tail end of the starting part (3) is provided with a protective cover net (10), and a coolant (9) is arranged between the outer side of the protective cover net (10) and the sieve plate (7).
6. An aerosol fire suppression apparatus for enhancing diffusing capacity and reducing nozzle temperature as set forth in claim 4 or 5 wherein: a plurality of separation nets (11) are further arranged in the coolant (9), and separation columns (12) are arranged between the separation nets (11).
7. An aerosol fire suppression apparatus for enhancing diffusing capability and reducing nozzle temperature as set forth in claim 2 wherein: the surface of the bottom cover (4.3) is also provided with a pressure relief hole (13), and the top of the outer shell (4.1) and the top of the inner shell (4.2) are both cambered structures.
8. An aerosol fire suppression apparatus for enhancing diffusing capacity and reducing nozzle temperature as set forth in claim 7 wherein: and a pressure relief diaphragm is also arranged in the pressure relief hole (13).
9. An aerosol fire suppression apparatus for enhancing diffusing capacity and reducing nozzle temperature as set forth in claim 1 wherein: the aerosol generating agent (2) is of a grain structure, and a silica gel sleeve (14) for heat insulation is arranged on the surface of the aerosol generating agent.
10. An aerosol fire suppression apparatus for enhancing diffusing capacity and reducing nozzle temperature as set forth in claim 4 wherein: the lower end of the outer cylinder (1) is provided with a rear cover (8) in threaded fit with the outer cylinder, and the rear cover (8) is provided with a through hole for penetrating the starting component (3).
CN202320708714.2U 2023-04-03 2023-04-03 Aerosol fire extinguishing device capable of improving diffusion capacity and reducing nozzle temperature Active CN220070577U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118846434A (en) * 2024-09-23 2024-10-29 浙江杺盛科技有限公司 An electrical automatic fire extinguishing device and fire extinguishing monitoring system thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118846434A (en) * 2024-09-23 2024-10-29 浙江杺盛科技有限公司 An electrical automatic fire extinguishing device and fire extinguishing monitoring system thereof

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Denomination of utility model: An aerosol fire extinguishing device that can improve diffusion ability and reduce nozzle temperature

Granted publication date: 20231124

Pledgee: Bank of Hankou Limited by Share Ltd. Yichang branch

Pledgor: Hubei and Andun Fire Technology Co.,Ltd.

Registration number: Y2025980018215

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