CN116764142A - Smoke detection method and smoke detection device - Google Patents
Smoke detection method and smoke detection device Download PDFInfo
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- CN116764142A CN116764142A CN202310730477.4A CN202310730477A CN116764142A CN 116764142 A CN116764142 A CN 116764142A CN 202310730477 A CN202310730477 A CN 202310730477A CN 116764142 A CN116764142 A CN 116764142A
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- 239000000779 smoke Substances 0.000 title claims abstract description 196
- 238000001514 detection method Methods 0.000 title claims abstract description 107
- 239000002245 particle Substances 0.000 claims abstract description 56
- 238000007664 blowing Methods 0.000 claims abstract description 25
- 230000001629 suppression Effects 0.000 claims abstract description 17
- 238000005507 spraying Methods 0.000 claims abstract description 10
- 230000002159 abnormal effect Effects 0.000 claims description 22
- 239000003795 chemical substances by application Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 11
- 230000005764 inhibitory process Effects 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 claims description 3
- 239000003112 inhibitor Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000000443 aerosol Substances 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- WVSNNWIIMPNRDB-UHFFFAOYSA-N 1,1,1,3,3,4,4,5,5,6,6,6-dodecafluorohexan-2-one Chemical compound FC(F)(F)C(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F WVSNNWIIMPNRDB-UHFFFAOYSA-N 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
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- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- QQZOPKMRPOGIEB-UHFFFAOYSA-N 2-Oxohexane Chemical class CCCCC(C)=O QQZOPKMRPOGIEB-UHFFFAOYSA-N 0.000 description 1
- 206010003497 Asphyxia Diseases 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
- A62C31/05—Nozzles specially adapted for fire-extinguishing with two or more outlets
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Detection Mechanisms (AREA)
- Fire Alarms (AREA)
Abstract
The embodiment of the invention discloses a smoke detection method and a smoke detection device. The smoke detection method is applied to a smoke detection device, the smoke detection device comprises a nozzle, an air suction type detector and a suppression device, the suppression device stores fire extinguishing agent, and the smoke detection method comprises the following steps: detecting smoke concentration of smoke particles in the battery pack based on the air suction type detector to obtain first smoke concentration information; blowing air in a second direction based on the nozzle in the case that the first smoke concentration information is greater than the preset concentration; detecting smoke concentration of smoke particles in the battery pack based on the air suction type detector to obtain second smoke concentration information; and spraying fire extinguishing agent to the battery pack based on the suppression device under the condition that the second smoke concentration information is larger than the preset concentration. The technical scheme of the invention can improve the accuracy of fire alarm and the real-time performance of fire extinguishment.
Description
Technical Field
The embodiment of the invention relates to the technical field of battery fire control, in particular to a smoke detection method and a smoke detection device.
Background
In the prior art, a nozzle is provided on the battery pack, and when the battery pack is in a fire, a large amount of smoke particles flow through the nozzle and are pumped into the suction type detector. The air suction type detector detects the smoke concentration of the battery pack, and sends out an alarm signal after the smoke concentration exceeds a concentration threshold. However, because of the high concentration and large particle size of the smoke particles, the nozzle is easily blocked or the smoke particles are accumulated after the fire disaster occurs in the battery pack, and in some cases, the blocked or accumulated smoke particles are pumped into the suction type detector, so that false alarm is easily caused. Therefore, the existing smoke detection method has the problems of low fire alarm accuracy and low fire extinguishing real-time performance.
Disclosure of Invention
The invention provides a smoke detection method and a smoke detection device, which are used for improving the accuracy of fire alarm and the real-time performance of fire extinguishment.
According to an aspect of the present invention, there is provided a smoke detection method applied to a smoke detection apparatus including a nozzle, an air-breathing detector, and a suppressing apparatus storing a fire extinguishing agent, the smoke detection method comprising:
detecting smoke concentration of smoke particles in a battery pack based on the air suction type detector to obtain first smoke concentration information, wherein the air suction type detector sucks the smoke particles in the battery pack based on a first direction, and the first direction is the direction from the nozzle to the air suction type detector;
blowing air in a second direction based on the nozzle when the first smoke concentration information is larger than a preset concentration, wherein the second direction is opposite to the first direction;
detecting the smoke concentration of smoke particles in the battery pack based on the air suction detector to obtain second smoke concentration information;
and spraying fire extinguishing agent to the battery pack based on the suppression device under the condition that the second smoke concentration information is larger than the preset concentration.
Optionally, in the case that the first smoke concentration information is greater than the preset concentration, the method further includes, after blowing based on the nozzle in the second direction:
and in the case that the first smoke concentration information is less than or equal to the preset concentration, performing air suction in a first direction based on the nozzle so as to transmit smoke particles in the battery pack to the air suction detector.
Optionally, the number of the battery packs includes a plurality, and each battery pack is provided with at least one nozzle;
the detecting of the smoke concentration of the smoke particles in the battery pack based on the air suction type detector further comprises the following steps of:
determining an abnormal battery pack based on the second smoke concentration information corresponding to each battery pack, wherein the second smoke concentration information corresponding to the abnormal battery pack is larger than the preset concentration;
and closing a target nozzle, wherein the inhibition device sprays fire extinguishing agent to the abnormal battery pack, and the target nozzle comprises at least one nozzle corresponding to the normal battery pack.
According to another aspect of the present invention, there is provided a smoke detection apparatus comprising a detection controller, a nozzle, an inhalation detector, and a suppression device;
the suction detector and the suppression device are electrically connected with the detection controller, and the detection controller is used for executing the smoke detection method according to any aspect;
the nozzle, the suppression device, and the suction detector are connected by a common conduit for spraying fire suppressant to the battery pack and for circulating smoke particles of the battery pack.
Optionally, the suction detector comprises a blowing device;
the detection controller is also used for controlling the blowing direction of the blowing device, and the blowing direction comprises a first direction and a second direction.
Optionally, the blowing device includes air exhauster and air blower, the air exhauster with the air blower respectively with survey the controller electricity is connected, survey the controller control the air exhauster with first direction is taken out, survey the controller control the air blower with the second direction is blown.
Optionally, the suction type detector comprises a first cavity and a second cavity, the exhaust fan is accommodated in the first cavity, the blower is accommodated in the second cavity, the first cavity is used for detecting smoke concentration, and the second cavity is used for providing air flow for dredging the nozzle.
Optionally, the suction type detector comprises a third cavity, and the blower and the exhaust fan are both arranged in the third cavity.
Optionally, the number of the battery packs includes a plurality, and each battery pack is provided with at least one nozzle;
the detection controller is used for controlling the switching valve of the at least one nozzle corresponding to each battery pack according to the second smoke concentration information corresponding to each battery pack.
Optionally, the smoke detection device further comprises an alarm device, the alarm device is connected with the detection controller, and the alarm device is used for performing audible and visual alarm according to the second smoke concentration information.
According to the technical scheme, firstly, smoke particles in a battery pack are subjected to first smoke concentration detection based on an air suction detector, so that first smoke concentration information is obtained; blowing air in a second direction based on the nozzle in the case that the first smoke concentration information is greater than the preset concentration; and then detecting the smoke concentration of the smoke particles in the battery pack for the second time based on the air suction type detector to obtain second smoke concentration information. In which the first detected smoke concentration information may be subject to errors, for example, in some cases the nozzle is clogged or smoke particles deposited near the nozzle are drawn into the aspirated detector, which can easily lead to false alarms. According to the embodiment of the invention, after the first smoke concentration detection, the air is blown in the second direction, namely in the opposite direction, based on the nozzle, so that the nozzle can be dredged, and the influence of the blocked nozzle or smoke particles accumulated near the nozzle on the second smoke concentration detection is avoided. Therefore, after the second detection of the smoke concentration, the accuracy of the second smoke concentration information obtained is higher than that of the first smoke concentration information. In summary, the embodiment of the invention can avoid the problem of low fire detection precision caused by nozzle blockage in the fire extinguishing process of the battery pack, thereby improving the accuracy of fire alarm and the real-time performance of fire extinguishment.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flow chart of a smoke detection method provided in accordance with an embodiment of the present invention;
fig. 2 is a flow chart of yet another smoke detection method provided in accordance with an embodiment of the present invention;
FIG. 3 is a flow chart of yet another smoke detection method provided in accordance with an embodiment of the present invention;
fig. 4 is a flow chart of yet another smoke detection method provided in accordance with an embodiment of the present invention;
fig. 5 is a schematic structural view of a smoke detection device according to an embodiment of the present invention;
fig. 6 is a schematic structural view of yet another smoke detection device provided in accordance with an embodiment of the present invention;
FIG. 7 is a schematic diagram of a dual chamber aspirated detector according to an embodiment of the invention;
fig. 8 is a schematic structural diagram of a single-cavity suction type detector according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a flowchart of a smoke detection method according to an embodiment of the present invention, and referring to fig. 1, an embodiment of the present invention provides a smoke detection method, and the smoke detection method is applied to a smoke detection device. The smoke detection device comprises a nozzle, an air suction type detector and a suppression device, wherein the suppression device stores fire extinguishing agent. The smoke detection method may be performed by a detection controller provided in the smoke detection apparatus, the smoke detection method comprising the steps of:
s110, detecting smoke concentration of smoke particles in the battery pack based on the air suction type detector to obtain first smoke concentration information, wherein the air suction type detector sucks the smoke particles in the battery pack based on a first direction, and the first direction is a direction from the nozzle to the air suction type detector.
Specifically, when the battery fires, a large amount of smoke particles generated flow through the nozzle along a first direction along with the airflow and are pumped into the suction type detector, and the suction type detector detects the smoke concentration of the smoke particles to obtain first smoke concentration information. This first smoke concentration information may be inaccurate, for example, smoke particles generated after a fire in a subsequent battery pack during long-term use may easily cause nozzle clogging or smoke particle accumulation, and in some cases, the clogged or accumulated smoke particles are pumped into the suction detector, so that the first smoke concentration information is continuously high, which may easily cause false alarms.
And S120, blowing air in a second direction based on the nozzle when the first smoke concentration information is larger than the preset concentration, wherein the second direction is opposite to the first direction.
Specifically, there are two situations that may result in the first smoke concentration information being greater than the preset concentration. The first case is when the battery pack is in fire. In the second case, the aerosol particles blocking the nozzle or the aerosol particles accumulated in the vicinity of the nozzle are sucked into the suction detector. Therefore, in order to eliminate false alarms caused by the second situation, the embodiment of the invention blows the nozzle along the second direction, and blows away the smoke particles and dust particles blocked on the nozzle or accumulated near the nozzle, thereby improving the detection precision of the smoke concentration.
And S130, detecting the smoke concentration of smoke particles in the battery pack based on the air suction type detector to obtain second smoke concentration information.
Specifically, this detection is a second detection of the smoke concentration, which is not affected by the original smoke particles and dust particles, since the smoke particles and dust particles clogged on or accumulated in the vicinity of the nozzle have been blown off in the foregoing step. Thus, the second smoke concentration information is more accurate information for fire alerting.
And S140, spraying fire extinguishing agent to the battery pack based on the inhibition device under the condition that the second smoke concentration information is larger than the preset concentration.
Specifically, when the second smoke concentration information is greater than the preset concentration, it is indicated that the battery pack does not alarm until a fire disaster occurs, but rather an error alarm is caused by the blockage of the nozzle or the accumulation of particles near the nozzle, and at this time, the fire extinguishing agent stored in the suppression device needs to be sprayed out through the nozzle to extinguish the fire of the battery pack.
According to the technical scheme, firstly, smoke particles in a battery pack are subjected to first smoke concentration detection based on an air suction detector, so that first smoke concentration information is obtained; blowing air in a second direction based on the nozzle in the case that the first smoke concentration information is greater than the preset concentration; and then detecting the smoke concentration of the smoke particles in the battery pack for the second time based on the air suction type detector to obtain second smoke concentration information. In which the first detected smoke concentration information may be subject to errors, for example, in some cases the nozzle is clogged or smoke particles deposited near the nozzle are drawn into the aspirated detector, which can easily lead to false alarms. According to the embodiment of the invention, after the first smoke concentration detection, the air is blown in the second direction, namely in the opposite direction, based on the nozzle, so that the nozzle can be dredged, and the influence of the blocked nozzle or smoke particles accumulated near the nozzle on the second smoke concentration detection is avoided. Therefore, after the second detection of the smoke concentration, the accuracy of the second smoke concentration information obtained is higher than that of the first smoke concentration information. In summary, the embodiment of the invention can avoid the problem of low fire detection precision caused by nozzle blockage in the fire extinguishing process of the battery pack, thereby improving the accuracy of fire alarm and the real-time performance of fire extinguishment.
On the basis of the above embodiments, the steps following S120 are further refined in the embodiments of the present invention, and the following description is given specifically, but the present invention is not limited thereto.
Fig. 2 is a flowchart of still another smoke detection method according to an embodiment of the present invention, referring to fig. 2, after S120, further including:
s121, in the case where the first smoke concentration information is less than or equal to the preset concentration, inhalation is performed in a first direction based on the nozzle, so that smoke particles in the battery pack are transferred to the inhalation detector.
Specifically, after S120 is performed, the concentration of smoke particles in the smoke detection device is reduced, and thus the smoke concentration information detected by the inhalation detector is reduced to be less than or equal to the preset concentration. As can be seen from the foregoing analysis, in S120, the first smoke concentration information is greater than the preset concentration for two reasons, in which the first case is that the battery pack does fire; in the second case, the aerosol particles blocking the nozzle or the aerosol particles accumulated in the vicinity of the nozzle are sucked into the suction detector. In either case, a second smoke concentration detection by the aspirated detector is required for verification. According to the embodiment of the invention, after the smoke concentration information is detected to be reduced, the air suction is carried out in the first direction based on the nozzle, so that smoke particles generated by the fire disaster can be quickly transmitted to the air suction detector, and the second smoke concentration detection is carried out.
In addition to the above embodiments, various modes of spraying the fire extinguishing agent to the battery pack based on the suppressing device are described below, but the present invention is not limited thereto.
In one embodiment, optionally, the number of battery packs includes a plurality, each battery pack being provided with at least one nozzle, fire suppressant is sprayed only to the battery pack that has a fire (i.e., thermal runaway).
Fig. 3 is a flowchart of still another smoke detection method according to an embodiment of the present invention, referring to fig. 3, after S130, further including:
s131, determining an abnormal battery pack based on the second smoke concentration information corresponding to each battery pack, wherein the second smoke concentration information corresponding to the abnormal battery pack is larger than the preset concentration.
Specifically, valves are arranged on the nozzles, and the smoke concentration of each battery pack is detected by controlling the opening and closing of the valves. The smoke concentration detection can be performed on a plurality of battery packs in a circulating mode with a preset period, the valves on the nozzles corresponding to the battery packs are opened, the air suction type detector sequentially sucks smoke in each battery pack through the nozzles, and the battery packs are matched with the corresponding nozzles and labeled with label information. The label information refers to the numbering of the currently detected battery pack and nozzle. In the course of the cycle, as long as the detected second smoke concentration information of a certain battery pack is found to be greater than the preset concentration, which indicates that the battery pack is subject to thermal runaway, the detection needs to be stopped at this time.
And S132, closing a target nozzle, wherein the inhibition device sprays fire extinguishing agent to the abnormal battery pack, and the target nozzle comprises at least one nozzle corresponding to the normal battery pack.
Specifically, it can be known that the battery packs except for the abnormal battery pack are all normal battery packs, and the target nozzles are arranged in the normal battery packs, so that the matching relation between each battery pack and the corresponding nozzle can be established according to the label information, after the abnormal battery pack is determined, the nozzle matched with the normal battery pack can be controlled to be closed, and the valve on the nozzle corresponding to the abnormal battery pack is opened, so that the fire extinguishing agent only flows into the abnormal battery pack to extinguish the fire, and the spread of fire is avoided. Optionally, a plurality of nozzles can be correspondingly arranged on one battery pack, and the nozzles can increase the flow of the fire extinguishing agent flowing into the abnormal battery pack, so that the fire extinguishing efficiency is improved.
Thus, the scheme of spraying the fire extinguishing agent only to the battery pack in which the fire (i.e., thermal runaway) occurs is achieved through S131 and S132.
In another embodiment, optionally, all of the battery packs are sprayed with fire suppressant once thermal runaway of the battery packs occurs. Fig. 4 is a flowchart of still another smoke detection method according to an embodiment of the present invention, referring to fig. 4, after S130, further including:
s133, opening all the nozzles, and spraying fire extinguishing agent to all the battery packs by the restraining device.
Specifically, when the second smoke concentration information is greater than the preset concentration, it indicates that there is thermal runaway of at least one battery pack, and as long as thermal runaway occurs, all nozzles are opened, and the suppressing device ejects fire extinguishing agent to all battery packs. This arrangement is advantageous in preventing thermal runaway from affecting each other between the battery packs, thereby causing a phenomenon in which the abnormal battery pack ignites the normal battery pack. In addition, the arrangement mode does not need to locate an abnormal battery pack, and the data processing pressure is low.
Fig. 5 is a schematic structural view of a smoke detection device according to an embodiment of the present invention, and referring to fig. 5, the embodiment of the present invention further provides a smoke detection device, which includes a detection controller 50, a nozzle 12, an air suction type detector 40, and a suppression device 30; both the suction detector 40 and the suppression device 30 are electrically connected to a detection controller 50; the nozzle 12, the suppressing means 30 and the suction detector 40 are connected by a common duct 20, the common duct 20 being used for spraying the fire extinguishing agent to the battery pack 11 and for the circulation of smoke particles of the battery pack 11.
In particular, since the common duct is used for a long period of time, smoke particles may be deposited in the common duct, causing clogging of the nozzle or accumulation of smoke particles, thereby affecting the detection accuracy of the suction detector 40. In order to solve this problem, the detection controller 50 is provided in the embodiment of the present invention to perform the smoke detection method according to any embodiment of the present invention, and the technical principle and effect thereof are similar, and will not be described again. In other embodiments, the common pipeline 20 may be detachably connected with the nozzle 12 and the suction type detector 40, so that the common pipeline 20 is convenient to be detached and cleaned, and the detection precision of the smoke concentration is ensured.
Alternatively, a plurality of battery packs 11 constitute the energy storage battery cluster 10, and the battery packs 11 may be lithium batteries. The battery packs 11 are each provided with at least one nozzle 12.
Fig. 6 is a schematic structural view of yet another smoke detection device provided according to an embodiment of the present invention, and referring to fig. 6, optionally, the suction detector 40 includes a blowing device; the detection controller 50 is further configured to control a blowing direction of the blowing device, where the blowing direction includes a first direction and a second direction.
Specifically, the air blowing device is a device capable of adjusting the air outlet direction, wherein the first direction and the second direction are opposite directions. The blowing device is used for conveying the smoke particles sucked into the air by the nozzle 12 to the suction detector 40 along the first direction for smoke concentration detection; alternatively, the blowing device is used to blow off dust particles accumulated on the common duct 20 and the nozzle 12 in the second direction.
With continued reference to fig. 6, optionally, the blowing device includes an exhaust fan 42 and a blower 41, where the exhaust fan 42 and the blower 41 are respectively electrically connected to a detection controller 50, and the detection controller 50 controls the exhaust fan 42 to exhaust air in a first direction and the detection controller 50 controls the blower 41 to blow air in a second direction.
Specifically, the air blown by the blower 41 is clean air, for example, a filter screen or other filtering devices can be arranged at the connection part of the blower 41 and the outside to filter out large particulate matters in the air, so that the concentration of the particles in the smoke detection device is reduced, and the detection precision is ensured. When the suction detector 40 is required to detect smoke concentration (including a first smoke concentration detection and a second smoke concentration detection), the detection controller 50 turns off the blower 41, and activates the blower 42 to generate a first direction air flow. When it is desired to blow the common duct 20, the detection controller 50 turns off the blower 42, activates the blower 41, and the blower 41 is operated to generate a reverse air flow (second direction air flow) which blows off the accumulated smoke particles. Alternatively, after blower 41 has been operated for a few seconds, detection controller 50 turns off blower 41 and turns on blower 42.
With continued reference to fig. 6, the smoke detection device may optionally further comprise an alarm device 60, where the alarm device 60 is connected to the detection controller 50, and the alarm device 60 is configured to perform an audible and visual alarm according to the second smoke concentration information.
Fig. 7 is a schematic structural diagram of a dual-cavity suction type detector according to an embodiment of the present invention, referring to fig. 7, alternatively, the suction type detector 40 includes a first cavity 43 and a second cavity 44, the suction fan 42 is accommodated in the first cavity 43, the blower 41 is accommodated in the second cavity 44, the first cavity 43 is used for detecting smoke concentration, and the second cavity 43 is used for providing air flow for dredging the nozzle.
Specifically, the aspirated detector 40 may be a dual cavity aspirated detector. A detector and an exhaust fan 42 are arranged in the first cavity 43, and a blower 41 is arranged in the second cavity 44. The exhaust fan 42 and the blower 41 are independently and separately arranged, and do not affect each other.
Fig. 8 is a schematic structural diagram of a single-cavity suction probe according to an embodiment of the present invention, and referring to fig. 8, optionally, the suction probe 40 includes a third cavity 45, and the blower 41 and the blower 42 are disposed in the third cavity 45.
Specifically, the suction detector is a single-cavity suction detector, and the blower 41 and the blower 42 are disposed in the single-cavity suction detector. Illustratively, the blower 41 and the exhaust fan 42 are both axial flow fans. The blower 41 and the exhaust fan 42 arranged in the single-cavity air suction type detector use an axial flow fan which is arranged in series, and air flows can flow along the abstract direction by utilizing the axial flow fan, so that mutual blocking is avoided, the space is saved, and the cost is reduced. The axial flow exhaust fan and the axial flow blower are arranged in series, and when one axial flow blower rotates, the other axial flow blower stops rotating.
Optionally, the number of battery packs includes a plurality, each battery pack being provided with at least one nozzle; the at least one nozzle is provided with an on-off valve, and the detection controller 50 controls the on-off valve of the at least one nozzle corresponding to each battery pack according to the second smoke concentration information corresponding to each battery pack.
Specifically, in the case of an abnormal battery pack, only the nozzle of the abnormal battery pack is opened, and the fire extinguishing agent is allowed to flow into only the abnormal battery pack. And determining an abnormal battery pack in the plurality of battery packs, and only opening a valve on a nozzle corresponding to the abnormal battery pack to enable the fire extinguishing agent to flow into the abnormal battery pack.
Optionally, the inhibiting device generally comprises a vial set and an inhibitor loaded into the vial set, and the vial set is pre-pressurized. For example, the inhibitor may be perfluoro hexanone. The perfluoro-hexanone fire extinguishing agent has good fire extinguishing effect, and the mechanism is to extinguish fire through the actions of physics and chemistry, and can be divided into three processes: first: cooling and extinguishing fire: after the perfluorinated hexanone liquid is atomized and sprayed out at a high speed, the liquid is gasified when meeting heat, and has strong heat absorption capacity due to large gasification heat capacity, so that the flame rapidly loses heat, and the fire tetrahedron balance is destroyed. Second,: extinguishing by asphyxiation: the perfluoro-hexanone has high specific gravity, and can isolate oxygen in air at the periphery of flame in the process of suspension falling. Third,: chemical inhibition fire extinguishing: free radicals of the combustion chain reaction can be captured, and the chain reaction of flame propagation is terminated. When thermal runaway occurs, the outlet of the bottle group is opened, and the inhibitor in the bottle group is preheated under the action of pressure and then sprayed out from the nozzle in a mist form, so that the fire is inhibited. On the one hand, the inhibitor in the inhibitor aerosol has the fire extinguishing performance per se, and on the other hand, the inhibitor rapidly fills the battery pack, so that the volume ratio of the combustible gas rapidly decreases, and the combustion condition cannot be met.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. A smoke detection method, characterized by being applied to a smoke detection device including a nozzle, a suction detector, and a suppression device storing a fire extinguishing agent, the smoke detection method comprising:
detecting smoke concentration of smoke particles in a battery pack based on the air suction type detector to obtain first smoke concentration information, wherein the air suction type detector sucks the smoke particles in the battery pack based on a first direction, and the first direction is the direction from the nozzle to the air suction type detector;
blowing air in a second direction based on the nozzle when the first smoke concentration information is larger than a preset concentration, wherein the second direction is opposite to the first direction;
detecting the smoke concentration of smoke particles in the battery pack based on the air suction detector to obtain second smoke concentration information;
and spraying fire extinguishing agent to the battery pack based on the suppression device under the condition that the second smoke concentration information is larger than the preset concentration.
2. The method according to claim 1, wherein, in the case where the first smoke concentration information is greater than the preset concentration, after blowing based on the nozzle in the second direction, further comprising:
and in the case that the first smoke concentration information is less than or equal to the preset concentration, performing air suction in a first direction based on the nozzle so as to transmit smoke particles in the battery pack to the air suction detector.
3. The method of claim 1, wherein the number of battery packs comprises a plurality, each battery pack being provided with at least one nozzle;
the detecting of the smoke concentration of the smoke particles in the battery pack based on the air suction type detector further comprises the following steps of:
determining an abnormal battery pack based on the second smoke concentration information corresponding to each battery pack, wherein the second smoke concentration information corresponding to the abnormal battery pack is larger than the preset concentration;
and closing a target nozzle, wherein the inhibition device sprays fire extinguishing agent to the abnormal battery pack, and the target nozzle comprises at least one nozzle corresponding to the normal battery pack.
4. A smoke detection device, characterized in that the smoke detection device comprises a detection controller, a nozzle, an air suction type detector and a suppression device;
the suction detector and the suppression device are both electrically connected to the detection controller for performing the smoke detection method of any one of claims 1-3;
the nozzle, the suppression device, and the suction detector are connected by a common conduit for spraying fire suppressant to the battery pack and for circulating smoke particles of the battery pack.
5. The smoke detection apparatus of claim 4 wherein said aspirated detector comprises an insufflation means;
the detection controller is also used for controlling the blowing direction of the blowing device, and the blowing direction comprises a first direction and a second direction.
6. The smoke detection apparatus of claim 5 wherein said air blowing means comprises an air extractor and a blower, said air extractor and said blower being electrically connected respectively to said detection controller, said detection controller controlling said air extractor to extract air in said first direction and said detection controller controlling said blower to blow air in said second direction.
7. The smoke detection device of claim 6 wherein said suction detector comprises a first chamber and a second chamber, said suction fan being received in said first chamber, said blower being received in said second chamber, said first chamber being configured to detect smoke concentration, said second chamber being configured to provide an air flow through said nozzle.
8. The smoke detection device of claim 6 wherein said aspirated detector comprises a third cavity, said blower and said aspirator being disposed in said third cavity.
9. The smoke detection device of claim 5 wherein said number of battery packs comprises a plurality, each battery pack being provided with at least one nozzle;
the detection controller is used for controlling the switching valve of the at least one nozzle corresponding to each battery pack according to the second smoke concentration information corresponding to each battery pack.
10. The smoke detection device of claim 5 further comprising an alarm device, said alarm device being coupled to said detection controller, said alarm device for audible and visual alarm based on second smoke concentration information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310730477.4A CN116764142A (en) | 2023-06-19 | 2023-06-19 | Smoke detection method and smoke detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310730477.4A CN116764142A (en) | 2023-06-19 | 2023-06-19 | Smoke detection method and smoke detection device |
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| Publication Number | Publication Date |
|---|---|
| CN116764142A true CN116764142A (en) | 2023-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310730477.4A Pending CN116764142A (en) | 2023-06-19 | 2023-06-19 | Smoke detection method and smoke detection device |
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| Country | Link |
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| CN (1) | CN116764142A (en) |
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- 2023-06-19 CN CN202310730477.4A patent/CN116764142A/en active Pending
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