An externally mounted composite fire detector

Abstract

The utility model relates to smoke detection technical field, concretely is a kind of external hanging type composite fire detector, including shell;Shell inside is equipped with smoke detection mechanism, and smoke detection mechanism includes slow flow cavity, slow flow cavity is set in shell inside one end, two gas inlets are set in slow flow cavity side, and combustible gas sensor is fixedly connected in slow flow cavity inside, slow flow cavity side is communicated with air cavity, and air cavity side is communicated with detection cavity, and smoke detection assembly is fixedly connected in detection cavity inside. The aspirating smoke detector for detecting fire that is set can detect smaller smoke particles and combustible gas that early-stage technology cannot see, these particles are produced in the earliest stage of this fire of excessive heating and open fire or smoldering, can discover the existence of fire within hours before visible smoke even earlier, the very high sensitivity makes the aspirating smoke detector for detecting fire can send out alarm in time in the early stage of fire development, effectively prevent the spread and expansion of fire.

Description

Technical Field

[0001] This utility model relates to the fields of smoke detection technology and combustible gas detection technology, specifically an external composite fire detector. Background Technology

[0002] As energy storage power stations expand in scale and become more complex, the risk of fire also increases. To ensure the safe operation of energy storage power stations, a highly efficient and reliable fire suppression system is crucial. Existing products are primarily passive smoke detection systems with relatively poor smoke detection sensitivity.

[0003] Utility model patent with publication number CN 218827368 U discloses a battery pack, which includes a housing, a battery pack, and a smoke detector. The housing contains a battery compartment and an electrical compartment, which are interconnected. The battery pack is installed in the battery compartment. The smoke detector is installed in the electrical compartment and is used to detect smoke signals inside the housing.

[0004] However, the above solutions still have some shortcomings. They can only detect smoke diffused within the battery pack, failing to detect early-stage smoke, thus affecting rescue time. This detection method is a free-diffusion type, with a long and uncontrollable delay, only providing an alarm function when the smoke has spread to a certain extent, making it unsuitable for early warning of lithium-ion battery thermal runaway. Therefore, we propose an external composite fire detector. This new composite detector is installed on the outer wall of the battery pack's electrical compartment, facilitating installation and maintenance. Furthermore, its active intake technology improves the accuracy of smoke and combustible gas detection and extends the lifespan of the composite fire detector. Summary of the Invention

[0005] The purpose of this invention is to provide an external composite fire detector that solves the problem that existing technologies can only detect smoke diffused within the battery pack, failing to detect early-stage smoke and thus affecting rescue time. This detection method is a free-diffusion type, with a long and uncontrollable delay, only providing an alarm function when the smoke has spread to a certain extent, making it unsuitable for early warning of lithium-ion battery thermal runaway.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An external composite fire detector, including a housing;

[0008] The housing is equipped with a smoke and combustible gas detection mechanism, which includes a slow-flow chamber located at one end of the housing. Two air inlets are located on one side of the slow-flow chamber. A combustible gas sensor is fixedly connected inside the slow-flow chamber. An air chamber is connected to the side of the slow-flow chamber, and a detection chamber is connected to the side of the air chamber. A smoke detection component is fixedly connected inside the detection chamber.

[0009] Preferably, an exhaust gas exhaust pipe is provided on the side of the air chamber away from the slow flow chamber, the air chamber is connected to the outside of the outer shell through the exhaust gas exhaust pipe, the detection chamber is connected to the exhaust gas exhaust pipe, and a filter cotton is fixedly connected to one side of the detection chamber.

[0010] Preferably, the outer casing is provided with a pipeline sampling mechanism, which includes a fan. The fan is fixedly connected inside the exhaust gas discharge pipeline, and a flexible hose is movably connected to the outside of the outer casing. The flexible hose is sleeved on the outside of the air inlet.

[0011] By employing the above technical solution, this utility model provides an external composite fire detector that has at least the following beneficial effects:

[0012] (1) The present invention can detect smaller smoke particles and combustible gases that cannot be seen by earlier technologies through the aspirating composite fire detector. These particles are often produced in the earliest stage of fire, such as overheating, as well as in open flame or smoldering. It has high sensitivity and can detect the existence of fire several hours or even earlier before visible smoke. This extremely high sensitivity enables the aspirating smoke detector to issue an alarm in the early stage of fire development, thereby effectively preventing the spread and expansion of fire.

[0013] (2) The utility model can easily insert the hose into the battery pack through the movable installation hose structure. At the same time, the position of the hose end can be easily adjusted, thereby conveniently controlling the detection area inside the battery pack. This makes the space around the hose end in a highly sensitive detection state, thereby improving the detection alarm effect of high-risk areas.

[0014] (3) This utility model adopts an external installation method, which effectively saves the internal space of the battery pack and increases the battery capacity. Moreover, existing products that are not equipped with battery pack-level combustible gas detectors and smoke alarm detectors can be equipped with this composite fire detection device through simple modification. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0016] Figure 1This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the present invention. Figure 1 ;

[0018] Figure 3 This is a schematic diagram of the internal structure of the present invention. Figure 2 ;

[0019] Figure 4 This is a bottom view of the present invention.

[0020] In the diagram: 1. Outer shell; 2. Smoke detection mechanism; 201. Flow chamber; 202. Air inlet; 203. Combustible gas sensor; 204. Air chamber; 205. Detection chamber; 206. Smoke detection component; 207. Exhaust gas exhaust pipe; 208. Filter cotton; 3. Pipe sampling mechanism; 301. Fan; 302. Hose. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1: An external composite fire detector, such as Figures 1-4As shown, the device includes a housing 1; inside the housing 1 is a smoke detection mechanism 2, which includes a slow-flow chamber 201 located at one end inside the housing 1. Two air inlets 202 are located on one side of the slow-flow chamber 201. A combustible gas sensor 203 is fixedly connected inside the slow-flow chamber 201. An air chamber 204 is connected to the side of the slow-flow chamber 201, and a detection chamber 205 is connected to one side of the air chamber 204. A smoke detection component 206 is fixedly connected inside the detection chamber 205. The combustible gas sensor 203 includes a hydrogen sensor, a carbon monoxide sensor, and a methane sensor. The smoke detection component 206 includes a dual-color laser tube and a smoke detection receiver. The smoke detection mechanism 2 can continuously collect smoke and combustible gases from the battery pack using the active dual-color laser detection inhalation method, achieving very early smoke detection. The dual-color laser can detect smoke concentrations within a certain range. With a wider and more sensitive range, it integrates the detection of hydrogen, carbon monoxide, and methane gases, enabling multi-dimensional monitoring of the battery pack. An exhaust pipe 207 is provided on the side of the air chamber 204 away from the slow-flow chamber 201. The air chamber 204 is connected to the outside of the outer casing 1 via the exhaust pipe 207. The detection chamber 205 is also connected to the exhaust pipe 207. A filter cotton 208 is fixedly connected to one side of the detection chamber 205. The air inlet 202 continuously draws in air from the battery pack. The air first passes through the slow-flow chamber 201 for carbon monoxide and hydrogen detection, then the sampled gas is discharged through the exhaust pipe 207, with a small portion allocated to the smoke detection chamber 205. Smoke concentration is detected using a dual-color laser. Simultaneously, an audible and visual alarm can be added to the outside of the outer casing 1 to promptly alert maintenance personnel upon detecting smoke or combustible gases.

[0023] Example 2: As Figures 1-4 As shown, the outer casing 1 is equipped with a pipeline sampling mechanism 3, which includes a fan 301. The fan 301 is fixedly connected inside the exhaust gas discharge pipeline 207. A flexible hose 302 is movably connected to the outside of the outer casing 1 and is fitted onto the outside of the air inlet 202. The pipeline sampling mechanism 3 can conveniently sample the gas inside the battery pack. At the same time, in conjunction with the smoke detection mechanism 2, it can collect particulate matter in the smoke in the early stage of smoke appearance and issue an alarm in time after detection. The structure of the fan 301 can provide power for the entire device. The negative pressure generated by the fan 301 draws the gas inside the battery pack into the outer casing, and the smoke detection mechanism 2 detects the gas. At the same time, the flexible hose 302 fitted onto the air inlet 202 can be inserted into the battery pack to detect smoke in the space of the set area of ​​the battery pack. This avoids the smoke detection mechanism 2 from being affected by the large space inside the battery pack when smoke appears.

[0024] In use, the external composite fire detector of this utility model is installed with the outer shell 1 on the vent of the battery pack, and the air inlet 202 is aligned with the vent of the battery pack. Simultaneously, the fan 301 is activated, drawing air out of the battery pack. Hydrogen and carbon monoxide sensors detect the drawn gas. After flowing into the air chamber 204, some gas flows to the detection chamber 205, which detects the gas, while the remaining gas is directly discharged into the outside air through the exhaust pipe 207. The fan 301, while drawing gas from the battery pack, also removes heat accumulated inside the battery pack. The gas is simultaneously discharged to the outside and dissipates internal heat, thereby reducing the probability of a fire in the battery pack. When the combustible gas sensor 203 detects hydrogen or carbon monoxide, or when the smoke detection component 206 detects smoke in the air inside the battery pack, the audible and visual alarm on the outside of the outer casing 1 will promptly warn maintenance personnel. When using the device, a flexible hose 302 can be fitted onto the outside of the air inlet 202 and inserted into the battery pack, with the end of the hose 302 positioned in the area to be detected. This allows the air around the end of the hose 302 to be drawn into the outer casing 1, thereby improving the sensitivity of smoke detection in the designated area inside the battery pack.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plug-in composite fire detector comprising a housing (1), characterised in that: The housing (1) is provided with a smoke detection mechanism (2). The smoke detection mechanism (2) includes a slow flow chamber (201). The slow flow chamber (201) is located at one end inside the housing (1). Two air inlets (202) are provided on one side of the slow flow chamber (201). A combustible gas sensor (203) is fixedly connected inside the slow flow chamber (201). An air chamber (204) is connected to the side of the slow flow chamber (201). A detection chamber (205) is connected to one side of the air chamber (204). A smoke detection component (206) is fixedly connected inside the detection chamber (205).

2. The external composite fire detector according to claim 1, characterized in that: The air chamber (204) is provided with an exhaust gas exhaust pipe (207) on the side away from the slow flow chamber (201). The air chamber (204) is connected to the outside of the outer shell (1) through the exhaust gas exhaust pipe (207). The detection chamber (205) is connected to the exhaust gas exhaust pipe (207). A filter cotton (208) is fixedly connected to one side of the detection chamber (205).

3. The external composite fire detector according to claim 1, wherein: The outer shell (1) is provided with a pipeline sampling mechanism (3), which includes a fan (301). The fan (301) is fixedly connected inside the exhaust gas discharge pipeline (207). A flexible hose (302) is movably connected to the outside of the outer shell (1), and the flexible hose (302) is sleeved on the outside of the air inlet (202).

Images