CN113975694A - Exhaust cabinet and fire extinguishing method - Google Patents
Exhaust cabinet and fire extinguishing method Download PDFInfo
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- CN113975694A CN113975694A CN202111414283.0A CN202111414283A CN113975694A CN 113975694 A CN113975694 A CN 113975694A CN 202111414283 A CN202111414283 A CN 202111414283A CN 113975694 A CN113975694 A CN 113975694A
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- China
- Prior art keywords
- fire extinguishing
- cabinet
- exhaust
- fire
- hood
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- 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
- A62C31/03—Nozzles specially adapted for fire-extinguishing adjustable, e.g. from spray to jet or vice versa
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- 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
- A62C37/40—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 with electric connection between sensor and actuator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
Abstract
The invention discloses an exhaust cabinet, which comprises a cabinet body, a cabinet door and a cabinet door, wherein the cabinet body is provided with an inner cavity, and the inner cavity forms a working cavity; the window is arranged on the front wall of the cabinet body and can move upwards or downwards along the height direction of the cabinet body; the air exhaust system is used for exhausting the air entering the working cavity from the working cavity; the fire extinguishing sensor is arranged on the wall of the working cavity; the fire extinguishing device is used for storing a fire extinguishing agent and is arranged outside the working cavity; the nozzle is arranged on the wall of the working cavity and is connected with the fire extinguishing device; wherein, the nozzle can be when putting out a fire sensor and detecting that there is the fire source in the working chamber, sprays fire extinguishing agent to the working chamber, and the window moves downwards along the direction of height of the cabinet body and closes, and exhaust system is in the open mode to make the working chamber be in the negative pressure state. The invention can realize fire extinguishing under negative pressure. The invention also provides a fire extinguishing method.
Description
Technical Field
The invention relates to the technical field of exhaust cabinets, in particular to an exhaust cabinet and a fire extinguishing method.
Background
A ventilation device can be generally described as a device for exhausting gas such as waste gas, harmful gas and particulate matter in a working space to the outside of the working space (usually, the outside), and the device has wide applications in industry and life, for example, a factory building for generating toxic and harmful or particulate matter gas in industrial production, a biological and chemical laboratory of research and development institutions, a kitchen for generating oil smoke during cooking, and other occasions, the ventilation device is required to isolate toxic and harmful gas and particulate matter in a certain working space from users, prevent the users from inhaling the toxic and harmful gas and particulate matter, and exhaust the toxic and harmful gas and particulate matter to the outside.
Fume hoods are important devices for controlling contaminants in laboratories. The function is to control the pollutant emitted in the cabinet and to discharge the pollutant to the outdoor smoothly, and the pollutant will not escape to the indoor through the operation opening of the exhaust cabinet, which is harmful to the health and safety of experimenters. In some cases, when the exhaust cabinet is used, the cabinet body can catch fire to generate a fire source, so that the safety of experimenters and equipment is influenced.
Therefore, it is necessary to extinguish fire in time after the fire of the exhaust hood.
Disclosure of Invention
The invention aims to solve the technical problem of fire of an exhaust cabinet. The invention provides an exhaust cabinet and a fire extinguishing method, which can realize 'fire extinguishing under negative pressure' after the exhaust cabinet is on fire, and have small experimental influence on laboratory environment in the cabinet and experiment in the cabinet.
In order to solve the above technical problem, an embodiment of the present invention discloses an exhaust cabinet, including: the cabinet body is provided with an inner cavity, and the inner cavity forms a working cavity; the window is arranged on the front wall of the cabinet body and can move upwards or downwards along the height direction of the cabinet body; the air exhaust system is used for exhausting the air entering the working cavity from the working cavity; the fire extinguishing sensor is arranged on the wall of the working cavity; the fire extinguishing device is used for storing a fire extinguishing agent and is arranged outside the working cavity; the nozzle is arranged on the wall of the working cavity and is connected with the fire extinguishing device; the fire extinguishing sensor is arranged in the cabinet body, the nozzle can jet fire extinguishing agent to the working cavity when the fire extinguishing sensor detects that a fire source exists in the working cavity, the window moves downwards along the height direction of the cabinet body and is closed, and the exhaust system is in an open state, so that the working cavity is in a negative pressure state.
By adopting the technical scheme, the aims of extinguishing fire under negative pressure, effectively extinguishing fire in the cabinet and ensuring safety outside the cabinet can be achieved.
According to another embodiment of the invention, the fire extinguishing agent is perfluorohexanone.
According to another embodiment of the present invention, the method further comprises: and the air supplementing system is used for supplementing air to the working cavity, and when the fire extinguishing sensor detects that a fire source exists in the working cavity, the air supplementing system is in a closed state.
According to another embodiment of the invention, the nozzle is arranged in a top chamber wall of the working chamber.
According to another embodiment of the present invention, the inside width of the exhaust cabinet is W, the inside depth of the exhaust cabinet is D, and the inside height of the exhaust cabinet is H;
the width of the nozzle from the center line of the exhaust cabinet along the width direction of the exhaust cabinet is W1, wherein W1 is more than or equal to 0mm and less than or equal to 0.32W;
along the depth direction of the exhaust cabinet, the depth of the nozzle from the rear cavity wall of the exhaust cabinet is D1, wherein D1 is more than or equal to 0.3D and less than or equal to 0.5D;
along the height direction of the exhaust cabinet, the height between the nozzle and the top cavity wall of the exhaust cabinet is H1, wherein H1 is more than 0mm and less than or equal to 0.2H.
According to another embodiment of the invention, wherein 0mm < W ≦ 1200mm, the number of nozzles is one, W1 ≦ 0 mm; or the W is more than 1200mm and less than or equal to 1800mm, the number of the nozzles is two, the width of each nozzle from the center line of the exhaust cabinet is W1, wherein the W1 is more than or equal to 0.17W and less than or equal to 0.25W; or W is more than 1800mm and less than or equal to 2400mm, the number of the nozzles is three, one nozzle is arranged on the center line of the exhaust cabinet, the width of each of the rest nozzles from the center line of the exhaust cabinet is W1, and W1 is more than or equal to 0.25W and less than or equal to 0.32W.
According to another embodiment of the present invention, Qmin≤QRow boardN is less than or equal to V, wherein QRow boardIndicating the fire-extinguishing row of the exhaust system when the nozzles spray extinguishing agentAir quantity, QminThe minimum air exhaust quantity of the exhaust system when the minimum air exchange times are guaranteed is represented, N represents the air exchange times of the exhaust cabinet, V represents the volume of a working cavity of the exhaust cabinet, and the minimum air exchange times of the exhaust cabinet is 150 times/hour. In some possible embodiments, N is 200.
According to another embodiment of the present invention, the fire extinguishing apparatus stores a fire extinguishing agent having a capacity of G ═ G (V/S) × C1 × K; wherein V represents the volume of the working chamber of the exhaust cabinet, S represents the specific volume of the fire extinguishing agent, C1 represents the fire extinguishing design concentration or the inerting design concentration, and K represents the pressure correction coefficient of the room in which the exhaust cabinet is positioned.
According to another embodiment of the invention, the pressure in said room is 0Pa, K1; the pressure of the room is-2 Pa, and K is 1.03; the pressure of the room is-5 Pa, and K is 1.063; the pressure in the room is-8 Pa, K1.08.
According to another embodiment of the invention, the fire extinguishing sensor is arranged on a top chamber wall of the working chamber and is arranged facing a bottom chamber wall of the working chamber.
According to another embodiment of the invention, the fire extinguishing sensor comprises any one or more of: photoelectric smoke detector, flame detector, temperature detector.
According to another embodiment of the present invention, the exhaust cabinet comprises a controller, and the controller is connected to the window, the air supply system, the exhaust system, the fire extinguishing sensor, the nozzle, and the fire extinguishing device.
The application also provides a fire extinguishing method of the exhaust cabinet, which comprises the following steps:
detecting that a fire source exists in a working cavity of the exhaust cabinet;
controlling a window of the exhaust cabinet to move downwards along the height direction of a cabinet body of the exhaust cabinet to be closed;
controlling an exhaust system of the exhaust cabinet to be in an open state so as to enable a working cavity of the exhaust cabinet to be in a negative pressure state;
and controlling a nozzle in the working cavity of the exhaust cabinet to spray fire extinguishing agent to the working cavity of the exhaust cabinet.
According to another embodiment of the invention, the fire extinguishing agent is perfluorohexanone.
According to another embodiment of the present invention, the fire extinguishing method further comprises: and controlling an air supplementing system of the exhaust cabinet to be in a closed state so as to enable a working cavity of the exhaust cabinet to be in a negative pressure state.
According to another embodiment of the invention, a fire extinguishing sensor detects that the working chamber of the exhaust cabinet is in a fire source, and controls the audible and visual alarm to send out an alarm signal.
According to another embodiment of the invention, at least two fire extinguishing sensors detect that the working chamber of the exhaust cabinet has a fire source, and the nozzle is controlled to spray the fire extinguishing agent to the working chamber of the exhaust cabinet.
According to another specific embodiment of the present invention, the time for controlling the air supply system of the exhaust cabinet to be in the closed state is 60 seconds, and the time for controlling the air exhaust system of the exhaust cabinet to be in the open state is 60 seconds.
According to another embodiment of the invention, the nozzle is controlled to spray the extinguishing agent out of the extinguishing device within 10 seconds.
Drawings
FIG. 1 is a first perspective view of a fume hood according to an embodiment of the present invention;
FIG. 2 is a first front view of the exhaust cabinet according to the embodiment of the present invention;
FIG. 3 is a first side view of a fume hood according to an embodiment of the present invention;
FIG. 4 is a perspective view of a fire suppression sensor in an exhaust cabinet according to an embodiment of the present invention;
FIG. 5 is a second perspective view of the exhaust cabinet according to the embodiment of the present invention;
FIG. 6 is a first schematic diagram of a first exemplary embodiment of a fume hood;
FIG. 7 is a second front view of the exhaust cabinet of the embodiment of the present invention;
FIG. 8 is a second side view of the hood according to the embodiment of the present invention;
FIG. 9 is a second schematic diagram of a second exemplary embodiment of a fume hood;
FIG. 10 is a third schematic top view of a fume hood according to an embodiment of the present invention;
FIG. 11 is a fourth illustration showing a top view of a fume hood in accordance with an embodiment of the present invention;
FIG. 12 is a third perspective view of the exhaust cabinet according to the embodiment of the present invention;
FIG. 13 is a fifth schematic diagram illustrating a top view of a fume hood in accordance with an embodiment of the present invention;
FIG. 14 is a third front view of the exhaust cabinet of the embodiment of the present invention;
FIG. 15 is a third side view of the hood according to the embodiment of the present invention;
FIG. 16 is a graph showing the concentration of a point P1 outside the exhaust hood according to the embodiment of the present invention;
FIG. 17 is a graph showing the concentration of a point P2 outside the exhaust hood according to the embodiment of the present invention;
FIG. 18 is a graph showing the concentration of a point P3 outside the exhaust hood according to the embodiment of the present invention;
FIG. 19 is a graph showing a concentration curve of a measurement point A1 inside the exhaust hood according to the embodiment of the present invention;
FIG. 20 is a graph showing a concentration curve of a measurement point A2 inside the exhaust hood according to the embodiment of the present invention;
FIG. 21 is a graph showing a concentration curve of a measurement point A3 inside the exhaust hood according to the embodiment of the present invention;
FIG. 22 is a graph showing a concentration curve of a measurement point A4 inside the exhaust hood according to the embodiment of the present invention;
FIG. 23 is a graph showing a concentration curve of a measurement point A5 inside the exhaust hood according to the embodiment of the present invention;
FIG. 24 is a graph showing a concentration curve of a measurement point A6 inside the exhaust hood according to the embodiment of the present invention;
FIG. 25 is a graph showing a concentration curve of a measurement point A7 inside the exhaust hood according to the embodiment of the present invention;
FIG. 26 is a graph showing a concentration curve of a measurement point A8 inside the exhaust hood according to the embodiment of the present invention;
FIG. 27 is a graph showing a concentration curve of a measurement point A9 inside the exhaust hood according to the embodiment of the present invention;
FIG. 28 is a graph showing the concentration at point B1 inside the fume hood according to the embodiment of the present invention;
FIG. 29 is a graph showing the concentration at point B2 inside the fume hood according to the embodiment of the present invention;
FIG. 30 is a graph showing a concentration at a point B3 inside the fume hood according to the embodiment of the present invention;
FIG. 31 is a graph showing the concentration at point B4 inside the fume hood according to the embodiment of the present invention;
FIG. 32 is a graph showing a concentration at a point B5 inside the fume hood in accordance with one embodiment of the present invention;
FIG. 33 is a graph showing a concentration at a point B6 inside the fume hood in accordance with one embodiment of the present invention;
FIG. 34 is a graph showing a concentration at a point B7 inside the fume hood according to the embodiment of the present invention;
FIG. 35 is a graph showing the concentration at point B8 inside the fume hood in accordance with one embodiment of the present invention;
FIG. 36 is a graph showing the concentration at point B9 inside the fume hood according to the embodiment of the present invention;
FIG. 37 shows the 1 st second isosurface at a concentration of 5.9% fire suppressant in the fume hood in accordance with an embodiment of the invention;
FIG. 38 shows the 2 nd contour at a concentration of 5.9% fire suppressant in the fume hood according to an embodiment of the invention;
FIG. 39 shows the 3 rd second isosurface at a concentration of 5.9% fire suppressant in the fume hood in accordance with an embodiment of the invention;
FIG. 40 shows the iso-surface at 4 seconds for a concentration of fire suppressant within the fume hood of 5.9% in accordance with an embodiment of the present invention;
FIG. 41 shows the 5 th second isosurface at a concentration of 5.9% fire suppressant in the fume hood in accordance with an embodiment of the invention;
FIG. 42 shows the 6 th second isosurface at a concentration of 5.9% fire suppressant in the fume hood in accordance with an embodiment of the invention;
FIG. 43 shows the 7 th second isosurface at a concentration of 5.9% fire suppressant in the fume hood in accordance with an embodiment of the invention;
FIG. 44 shows the iso-surface at 8 seconds with a concentration of fire suppressant of 5.9% in the fume hood according to an embodiment of the invention;
FIG. 45 shows the contour at 9 seconds for a concentration of fire suppressant within the fume hood of 5.9% in accordance with an embodiment of the present invention;
FIG. 46 shows the 10 th second isosurface at a concentration of 5.9% fire suppressant in the fume hood according to an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to these embodiments. On the contrary, the invention is described in connection with the embodiments for the purpose of covering alternatives or modifications that may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.
In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements indicated must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the present invention.
The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present embodiment, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In some possible embodiments, a fire detecting tube is arranged in the cabinet body of the exhaust hood. When a fire breaks out in the cabinet body of the exhaust cabinet, the flame at 170 ℃ burns the fire detecting pipe, and the fire extinguishing agent is sprayed out from the broken opening, so that the fire extinguishing is realized. Or in some possible embodiments, the flame burns the fire detecting pipe, the pressure in the fire detecting pipe is reduced, the pressure reduction signal triggers the opening electromagnetic valve of the fire extinguishing device to open, and the fire extinguishing agent is sprayed out from the metal pipeline nozzle to extinguish the fire. However, this fire fighting method cannot timely extinguish the fire in the early stage. After the fire extinguishing agent in the fire extinguishing device is sprayed, the pressure in the cabinet body of the exhaust cabinet rises, and toxic and harmful gas in the cabinet can leak to the laboratory space.
For this reason, the present application provides another way of extinguishing a fire: extinguishes fire under negative pressure, and has small influence on laboratory environment in the cabinet and experiment in the cabinet.
Referring to fig. 1 to 14, the present application provides a hood 1 including a cabinet body 10. The cabinet 10 has a front wall 101, a rear cavity wall 103, a left wall 105, a right wall 106, a top cavity wall 104, and a bottom cavity wall 102. The front wall 101 and the rear cavity wall 103 are disposed opposite to each other in the depth direction (Z direction in fig. 3) of the cabinet 1, the left wall 105 and the right wall 106 are disposed opposite to each other in the width direction (X direction in fig. 2) of the cabinet 1, and the top cavity wall 104 and the bottom cavity wall 102 are disposed opposite to each other in the height direction (Y direction in fig. 1 to 3, 8, and 12) of the cabinet 1. The cavity walls enclose an inner cavity of the cabinet body 10, and the inner cavity forms a working cavity 11 of the exhaust cabinet 1.
When the cabinet 1 is placed in an indoor environment, the wall of the cabinet 10 facing the user is the front wall 101. A window 20 is arranged on the front wall 101 of the cabinet 10, and the window 20 can move upwards along the height direction (shown in the direction Y in fig. 1 to 3, 8 and 12) of the cabinet 10 to open so as to form a front opening which is opened to the indoor environment and is used as an operation opening; alternatively, the viewing window 20 may be moved downward in the height direction of the cabinet 10.
The exhaust cabinet 1 of the application further comprises an air supplementing system and an air exhausting system. The air supply system is used for supplying air to the working cavity 11, and the air exhaust system is used for exhausting air entering the working cavity 11 from the working cavity 11. Illustratively, the air supply system comprises an air supply air valve and an air supply opening arranged on the exhaust cabinet 1. The exhaust system comprises an exhaust air valve and an exhaust outlet 12 arranged on the exhaust cabinet 1. Exemplarily, the exhaust outlet 12 of the exhaust hood 1 is arranged at the top of the exhaust hood 1. In some possible embodiments, the hood 1 does not comprise an air make-up system.
A fire extinguishing sensor and a nozzle 50 are arranged on the wall of the working chamber 11 of the cabinet body 10. Illustratively, the fire suppression sensor and nozzle 50 described above are disposed on a top chamber wall 104 of the working chamber 11. A fire extinguishing device 40 is arranged outside the working chamber 11 of the cabinet body 10. Illustratively, the fire suppression device 40 is provided at the top of the cabinet 10. The fire extinguishing apparatus 40 is used to store fire extinguishing agent and is connected to the nozzle 50. illustratively, the fire extinguishing apparatus 40 is connected to the nozzle 50 by a fire extinguishing agent line 43 to provide fire extinguishing agent to the nozzle 50. The number of nozzles 50 is not limited, and may be set according to the fire extinguishing requirement, for example, the number of nozzles 50 is one, two, or three.
Illustratively, the fire suppression sensor includes any one or more of: a photoelectric smoke detector 30, a flame detector 32 (infrared flame detector and ultraviolet flame detector), and a temperature detector 31. As shown in fig. 2 to 4, the fire extinguishing sensor of the present application includes: a photoelectric smoke detector 30, a flame detector 32 and a temperature detector 31. The photoelectric smoke detector 30, the flame detector 32 and the temperature detector 31 are disposed on the fire extinguishing mounting plate and connected to a wall (e.g., the top wall 104) of the working chamber 11 through the fire extinguishing mounting plate. The connection mode of the fire extinguishing installation plate and the cavity wall of the working cavity 11 is not limited. For example, in the present application, the fire extinguishing mounting plate is provided with a screw hole 331, and the screw hole 331 of the fire extinguishing mounting plate is fixedly connected with the wall of the working chamber 11 by a screw (not shown).
In the present application, the nozzle 50 can spray the fire extinguishing agent to the working chamber 11 when the fire extinguishing sensor detects that there is a fire source in the working chamber 11, and the window 20 moves downward along the height direction of the cabinet 10 to be closed, the air supply system is in a closed state, and the air exhaust system is in an open state, so that the working chamber 11 is in a negative pressure state. That is, when the fire extinguishing sensor detects a fire source in the working chamber 11, it indicates that fire occurs in the working chamber 11 of the exhaust hood 1, the window 20 moves downward to close (oxygen supply is cut off, pollutants are prevented, and fire extinguishing agent overflows), and the air supply system is in a closed state (oxygen supply is cut off), the air exhaust system is in an open state, and the air exhaust volume is adjusted to the fire extinguishing air exhaust volume value, so that the working chamber 11 of the exhaust hood 1 is in a negative pressure state.
When the exhaust cabinet 1 is in a negative pressure state, the fire extinguishing agent in the fire extinguishing device 40 is sprayed to the fire source in the working cavity 11 through the nozzle 50, so that fire extinguishment under negative pressure is realized, and the experimental influence on the laboratory environment in the cabinet and the experiment in the cabinet is small. After the fire extinguishing agent in the fire extinguishing device 40 is sprayed, the pressure in the cabinet body 10 of the exhaust cabinet 1 is increased, and the possibility that toxic and harmful gas in the cabinet leaks to a laboratory space is reduced. The aims of extinguishing fire under negative pressure, effectively extinguishing fire in the cabinet and ensuring safety outside the cabinet are fulfilled.
In some possible embodiments, when the exhaust hood does not include an air supplement system, and when the fire extinguishing sensor detects a fire source in the working chamber 11, indicating that a fire is occurring in the working chamber 11 of the exhaust hood 1, the window 20 is moved downward to close (to cut off oxygen supply, prevent pollutants, and prevent fire extinguishing agents from overflowing), and the exhaust system is in an open state, so that the working chamber 11 of the exhaust hood 1 is in a negative pressure state.
Illustratively, the nozzle 50 may spray fire suppressant toward the working chamber 11 when any one of the fire sensors 30, 32, 31 detects a fire source in the working chamber 11. The promptness of the fire extinguishing device 40 for extinguishing the fire of the exhaust cabinet 1 is improved.
In some possible embodiments, when one of the fire extinguishing sensors detects a fire source in the working chamber 11, the hood 1 sends an alarm signal, and the nozzle 50 in the hood 1 does not spray the fire extinguishing agent to the working chamber of the hood 1. In some possible embodiments, the nozzles 50 in the hood 1 spray fire suppressant towards the working chamber of the hood 1 when at least two fire extinguishing sensors detect a fire source in the working chamber 11.
In some possible embodiments, the fire extinguishing agent stored in the fire extinguishing device 40 is perfluorohexanone.
Perfluorohexanone: BI1230, named dodecafluoro-2-methyl-pentanone. Perfluorohexanone has the following characteristics: (1) its boiling point is higher than other gaseous extinguishing agents, and it is liquid at normal temp., and is not a dangerous article, and can be stored and transported in a wide temp. range by using ordinary container under the condition of normal pressure. (2) The perfluorohexanone has the heat of vaporization of only 1/25 times that of water and the vapor pressure of 12 times that of water, so that it is easily vaporized, and even at low temperature (-25 ℃), it is effectively vaporized and diffused to the space it protects, extinguishing fire, protecting the safety of personnel and equipment, and leaving no trace. (3) The perfluorohexanone does not contain chemical components such as solid particles, grease, chlorine and bromine and the like which damage the ozone layer, is non-conductive, volatile, traceless and non-corrosive, and does not damage electronic parts and circuits. (4) Perfluorohexanone has been approved by the U.S. environmental protection agency EPA to meet the registration requirement list of SNAP (important new substitute policy). Can be used in places with people and has no harm to human body. Typical application sites include computer rooms, data centers, military industry, equipment depots, aviation, ships, vehicles, libraries, oil production, natural gas production, and other sites of fire. (5) The sealing material has no obvious chemical reaction on common metal and rubber sealing materials, does not damage electronic components and circuits, and is compatible with a wide range of structural materials.
The perfluorohexanone has a good fire extinguishing effect, the mechanism of the perfluorohexanone is that fire is extinguished through two aspects of physics and chemistry, and the fire extinguishing method can be divided into three processes: firstly, the method comprises the following steps: the perfluorohexanone liquid is atomized at high speed and sprayed out to be vaporized by heat, and the heat capacity of vaporization is large, so that the perfluorohexanone liquid has strong heat absorption capacity, the flame loses heat quickly, and the tetrahedral balance of fire is destroyed. Secondly, the method comprises the following steps: the perfluorohexanone has high specific gravity, and can isolate oxygen in the air around the flame in the suspension falling process. Thirdly, the method comprises the following steps: chemical inhibition extinguishes fire, can capture free radicals of combustion chain reaction, and stops the chain reaction of flame propagation. Typical design concentrations range from 4.5 to 5.9 volume percent.
In some possible embodiments, referring to fig. 2, 3, 8, 15, the nozzle 50 is provided in the top chamber wall 104 of the working chamber 11, as described above. That is, the nozzle 50 is disposed facing the bottom chamber wall 102 of the working chamber 11 in the height direction of the hood 1. Thus arranged, the fire extinguishing agent can be conveniently sprayed to the fire source in the working chamber 11, and the fire can be extinguished. Illustratively, the nozzles 50 are mounted in a position directly above the potentially fire-fighting equipment with the nozzles 50 facing downward. Therefore, the concentration of the fire extinguishing agent is high, and the fire extinguishing efficiency is higher.
In some possible embodiments, the fire suppression sensor is mounted in a position directly above the potentially fire-fighting equipment, with the fire suppression sensor facing downward. After the arrangement, the detection distance is short, and the response speed is high.
In some possible embodiments, referring to fig. 6 to 11, along the width direction of the hood 1 (shown by the direction X in fig. 6, 7, 9 to 11), the internal width of the hood 1 is W; along the depth direction (shown as the Z direction in fig. 8) of the exhaust cabinet 1, the depth of the interior of the exhaust cabinet 1 is D; the height of the cabinet 1 is H in the height direction of the cabinet 1 (indicated by Y direction in fig. 8 to 11).
Wherein, along the width direction of the fume hood 1, the width of the nozzle 50 from the center line of the fume hood 1 is W1 (as shown in FIG. 6, FIG. 10, FIG. 11), wherein, W1 is more than or equal to 0mm and less than or equal to 0.32W. The center line of the cabinet 1 is, for example, a symmetrical center line in the width direction, and the plane a shown in fig. 6, 7, 10, and 11 symmetrically divides the cabinet 1 into two parts in the width direction, and the center line of the cabinet 1 is located in the plane a. Along the depth direction of the exhaust cabinet 1, the depth of the nozzle 50 from the rear cavity wall (i.e. the rear cavity wall 103) of the exhaust cabinet 1 is D1 (as shown in FIG. 8), wherein D1 is more than or equal to 0.3D and less than or equal to 0.5D; along the height direction of the exhaust cabinet 1, the height of the nozzle 50 from the top cavity wall 104 of the exhaust cabinet 1 is H1 (as shown in FIG. 8), wherein H1 is more than 0mm and less than or equal to 0.2H.
In some possible embodiments, the specific number of nozzles 50 and the specific value of the width W1 of the nozzles 50 from the center line of the hood 1 may be set according to the width W of the hood 1.
Illustratively, referring to FIG. 9, 0mm < W ≦ 1200mm, the number of nozzles 50 is one, and W1 is 0 mm. That is, when the width W of the cabinet 1 is within the above range, the effective fire extinguishing can be achieved by providing one nozzle 50 at the center line of the cabinet 1.
Illustratively, referring to FIG. 10, 1200mm < W.ltoreq.1800 mm, the number of nozzles 50 is two, and each nozzle 50 has a width W1 from the center line of the hood 1, where 0.17 W.ltoreq.W 1.ltoreq.0.25W. That is, when the width W of the hood 1 is within the above range, two nozzles 50 are provided in the hood 1, and the two nozzles 50 are equally spaced from the center line a, thereby effectively extinguishing fire. Exemplarily, the hood 1 has a width W of 1466 mm. The distance between the two nozzles 50 is 600 mm.
Illustratively, referring to FIG. 11, 1800mm < W.ltoreq.2400 mm, the number of the nozzles 50 is three, one of the nozzles 50 is disposed at the center line of the hood 1, and each of the remaining nozzles 50 has a width W1 from the center line of the hood 1, wherein 0.25 W.ltoreq.W 1.ltoreq.0.32W. That is, when the width W of the hood 1 is within the above range, the three nozzles 50 are provided in the hood 1, and effective fire extinguishing can be achieved. The three nozzles 50 are arranged in a row in the width direction of the hood 1. The distance between the adjacent two nozzles 50 is equal.
In some possible embodiments, Qmin≤QRow boardN is less than or equal to V, wherein QRow boardShows the fire extinguishing air discharge quantity Q of the air discharge system when the nozzle 50 sprays the fire extinguishing agentminThe minimum exhaust air volume of the exhaust system when the minimum ventilation times are guaranteed is shown, N shows the ventilation times of the exhaust cabinet 1, V shows the volume of the working chamber 11 of the exhaust cabinet 1 (V ═ W × D × H), and the minimum ventilation times of the exhaust cabinet 1 is 150 times/hour. Within the range, the exhaust cabinet 1 is in a negative pressure state. In some possible embodiments, Qmin＝N*V＝150*1.51＝226.5m3V is 1.51m in cabinet3. In some possible embodiments, N ═ N200。
In some possible embodiments, the fire suppression apparatus 40 stores a volume of fire suppressant G, (V/S) x C1 x K; wherein V represents the volume of the working chamber 11 of the fume hood 1, S represents the specific volume of the fire extinguishing agent, C1 represents the fire extinguishing design concentration or inerting design concentration, and K represents the pressure correction coefficient of the room in which the fume hood 1 is located. Through the volume calculation formula of the fire extinguishing agent, effective fire extinguishing of the exhaust cabinet 1 can be realized.
Illustratively, the pressure in the room is 0Pa, K1; the pressure of the room is-2 Pa, and K is 1.03; the pressure of the room is-5 Pa, and K is 1.063; the pressure in the room was-8 Pa, and K was 1.08.
For example, the amount of fire extinguishing agent G for a 1.5 m fume hood 11.5。V1.5The internal volume is 1.47m, 0.79m, 1.3m, 1.51m3。S:0.0719m3Per kg; c1: the fire extinguishing range is 4.5% -5.9%, and the maximum value is 5.9%; the room pressure was-5 Pa and K was 1.063. G1.5＝(V/S)*C1K-K (1.51/0.0719) 0.059-1.063-1.31 kg, G after 10% safety margin increase1.5＝1.31*(1+10％)＝1.44kg。
Spraying in 10s, and calculating flow volume Q1.5＝V/T，V＝G1.5And/rho. Wherein V represents the volume in gas state (m)3) T represents the injection time s, here 10s, after injection; ρ represents the density in the gaseous state, here 0.0136g/cm3。Q1.5＝(1.44/13.6)/10*3600＝38.1m3/h。
Therefore, the fire extinguishing agent dosage required by the exhaust cabinet 1 for extinguishing fire can be met through the fire extinguishing agent dosage calculation formula.
In some possible embodiments, referring to fig. 1, the fume hood 1 of the present application includes a controller 60, and the controller 60 is connected to the window 20, the air supply system, the air exhaust system, the fire extinguishing sensor, the nozzle 50, and the fire extinguishing device 40. Wherein the controller 60 and the fire extinguishing sensor are connected by a first cable 61. The fire extinguishing apparatus 40 includes a fire extinguishing control valve 41, and the fire extinguishing control valve 41 is connected to the controller 60 through a second cable 42. Accordingly, when the fire extinguishing sensor detects that there is a fire source in the cabinet 1, the window 20 is controlled by the controller 60 to move downward along the height direction of the cabinet 1, and the control valve 41 of the fire extinguishing apparatus 40 is controlled so that the fire extinguishing apparatus 40 supplies the fire extinguishing agent to the nozzle 50.
In some possible embodiments, the fume hood 1 of the present application further includes an audible and visual alarm, which is connected to the controller 60. When the fire extinguishing sensor detects that a fire source exists in the exhaust cabinet 1, the controller 60 controls the audible and visual alarm to send out an alarm signal.
The application also provides a fire extinguishing method of the exhaust cabinet 1, which comprises the following steps:
the fire source in the working chamber 11 of the exhaust cabinet 1 is detected, for example, by the fire extinguishing sensor in the above embodiment, the fire source in the working chamber 11 of the exhaust cabinet 1 is detected.
The window 20 of the exhaust cabinet 1 is controlled to move downwards along the height direction of the cabinet body 10 of the exhaust cabinet 1 to be closed, and when the fire extinguishing sensor detects that a fire source exists in the exhaust cabinet 1, for example, the window 20 is controlled to move downwards along the height direction of the exhaust cabinet 1 through the controller 60 to cut off oxygen supply, prevent pollutants and prevent fire extinguishing agents from overflowing.
The air supply system of the exhaust cabinet 1 is controlled to be in a closed state (oxygen supply is cut off), and the exhaust system of the exhaust cabinet 1 is controlled to be in an open state, so that the working cavity 11 of the exhaust cabinet 1 is in a negative pressure state. For example, the controller 60 controls the air supply system of the cabinet 1 to be in a closed state, and controls the air exhaust system of the cabinet 1 to be in an open state, so that the working chamber 11 of the cabinet 1 is in a negative pressure state. In some possible embodiments, the hood 1 does not comprise an air make-up system. Therefore, when the fire source is detected in the working cavity 11 of the exhaust cabinet 1, the exhaust system of the exhaust cabinet is controlled to be in a closed state, so that the working cavity of the exhaust cabinet is in a negative pressure state.
Controlling the nozzles 50 in the working chamber 11 of the exhaust cabinet 1 to spray the fire extinguishing agent to the working chamber 11 of the exhaust cabinet 1. For example, the controller 60 controls the nozzle 50 to spray the fire extinguishing agent to the working chamber 11 of the hood 1. The fire extinguishing agent sprayed by the nozzle 50 is, for example, perfluorohexanone.
In some possible embodiments, the fire extinguishing sensor detects a fire source in the working chamber of the exhaust hood 1, and controls the audible and visual alarm to send out an alarm signal, so that the nozzle 50 does not spray the fire extinguishing agent to the working chamber 11 of the exhaust hood 1.
In some possible embodiments, the nozzle 50 is controlled to spray fire suppressant towards the working chamber 11 of the hood 1 when at least two fire extinguishing sensors detect a fire source in the working chamber of the hood. Can prevent fire extinguishing agent from being sprayed by mistake.
In some possible embodiments, the time period for controlling the air supply system of the fume hood 1 to be in the closed state is 60 seconds, and the time period for controlling the air exhaust system of the fume hood 1 to be in the open state is 60 seconds. In the time parameter range, the exhaust cabinet 1 can be in a negative pressure state, and fire extinguishment under negative pressure is realized.
In some possible embodiments, the nozzle 50 is controlled to spray the fire extinguishing agent out of the fire extinguishing device 40 within 10 seconds. That is, when there is a fire source in the working chamber 11 of the exhaust cabinet 1, the fire extinguishing device 40 completely sprays the fire extinguishing agent within 10 seconds, thereby realizing effective fire extinguishing of the exhaust cabinet 1.
The fire extinguishing effect of the hood 1 of the present application in the above embodiment is described below with reference to fig. 12 to 46. Two nozzles 50 are arranged in the working chamber 11 of the exhaust hood 1 as an example, and the fire extinguishing agent is completely sprayed within 10 seconds as an example.
Establishing a physical model: constructed as a 1.5 meter cabinet, the window 20 is in a closed position (still having an opening of 35mm for indoor ventilation), as shown in fig. 15, the window 20 is at a height of 35mm from the bottom chamber wall 102. Exhaust volume Q of exhaust cabinet 1Row board226.5cmh, volume flow of extinguishing agent 38.1cmh, and volume flow per nozzle 50 19.05 cmh. Referring to fig. 13, one of the nozzles 50 is located at a distance of 433mm from the left wall 105 in the width direction, and the other nozzle 50 is located at a distance of 433mm from the right wall 106 in the width direction.
Referring to fig. 14, the middle measuring points (B2, B5, B8, a2, a5, A8) of the B and C layers are located at the center line a of the hood 1, the left measuring points (B1, B4, B7, a1, a4, a7) of the B and C layers are 83mm apart from the left wall 105 in the width direction, and the right measuring points (B3, B6, B9, A3, A6, a9) of the B and C layers are 83mm apart from the left wall 105 in the width direction.
Referring to FIG. 15, along the height direction of the exhaust hood 1, the distance between the B-layer measuring point and the C-layer measuring point is 350mm, and the distance between the C-layer measuring point and the bottom cavity wall 1024 is 50 mm. In the depth direction of the hood 1, the front measuring points (B1, B2, B3, A1, A2 and A3) of the B and C floors are at a distance of 150mm from the front wall 101, the rear measuring points (B7, B8, B9, A7, A8 and A9) of the B and C floors are at a distance of 103mm from the rear wall 103, and the middle measuring points (B4, B5, B6, A4, A5 and A6) of the B and C floors are at a distance of 224mm from the front measuring points of the B and C floors.
The basis for judging the external leakage pollution of the exhaust cabinet 1 is as follows: referring to fig. 12 and 15, along the depth direction of the exhaust cabinet 1, the outside is 75mm outside the window 20, 3 measuring points (P1, P2 and P3) are arranged on the opening surface, the concentration of the left (P1 measuring point), the middle (P2 measuring point) and the right (P3 measuring point) 3 points is measured, and the required value is not more than 10%.
Referring to fig. 14, in the width direction of the cabinet 1, the left side point (point P1) is 83mm away from the left wall 1052, the right side point (point P3) is 83mm away from the left wall 1052, and the middle side point (point P2) is located at the center line a of the cabinet 1.
Through simulation many times, the fire extinguishing effect of foretell exhaust cabinet 1 reaches the requirement. See in particular the description with respect to the following figures:
FIG. 16 shows the concentration value at the point P1, FIG. 17 shows the concentration value at the point P2, FIG. 18 shows the concentration value at the point P3, and the concentration values at the outer three points do not exceed 10% as shown in FIGS. 16 to 18. Therefore, the external leakage pollution of the exhaust cabinet 1 meets the requirement.
Fig. 19 shows the concentration value at the point a1, fig. 20 shows the concentration value at the point a2, fig. 21 shows the concentration value at the point A3, fig. 22 shows the concentration value at the point a4, fig. 23 shows the concentration value at the point a5, fig. 24 shows the concentration value at the point a6, fig. 25 shows the concentration value at the point a7, fig. 26 shows the concentration value at the point A8, fig. 27 shows the concentration value at the point a9, and the concentration values at the nine points of the B level are more than 5.9% of the fire extinguishing concentration values as shown in fig. 19 to 27. Thus, effective fire extinguishing is achieved in the exhaust hood 1.
Fig. 28 shows the concentration value at the point B1, fig. 29 shows the concentration value at the point B2, fig. 30 shows the concentration value at the point B3, fig. 31 shows the concentration value at the point B4, fig. 32 shows the concentration value at the point B5, fig. 33 shows the concentration value at the point B6, fig. 34 shows the concentration value at the point B7, fig. 35 shows the concentration value at the point B8, fig. 36 shows the concentration value at the point B9, and the fire extinguishing concentration values at the nine points of the level C exceed 5.9% as shown in fig. 28 to 36. Thus, effective fire extinguishing is achieved in the exhaust hood 1.
Fig. 37 to 46 show the iso-surfaces per second for the 1 st to 10 th seconds, respectively, at a concentration of fire suppressant in the hood 1 of 5.9%. And (3) carrying out transient analysis on each measuring point in the exhaust cabinet 1 by establishing a CFD physical model, and judging that the fire is extinguished when each measuring point reaches the concentration of 5.9% within 10 s. And (3) performing transient analysis on each measuring point outside the exhaust cabinet 1 by establishing a CFD physical model, and judging that the measuring points are safe when the concentration of each measuring point is lower than 10% within 10 s.
In conclusion, the CFD analysis shows that, for the exhaust cabinet 1 of the present application, when the number of the nozzles is 2 and the position of the nozzle 50 is the position of the above embodiment, the purposes of extinguishing fire in the exhaust cabinet 1 and ensuring safety outside the exhaust cabinet 1 can be achieved.
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the invention, taken in conjunction with the specific embodiments thereof, and that no limitation of the invention is intended thereby. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the invention.
Claims (20)
1. An exhaust hood, comprising:
the cabinet body is provided with an inner cavity, and the inner cavity forms a working cavity;
the window is arranged on the front wall of the cabinet body and can move upwards or downwards along the height direction of the cabinet body;
the air exhaust system is used for exhausting the air entering the working cavity from the working cavity;
the fire extinguishing sensor is arranged on the wall of the working cavity;
the fire extinguishing device is used for storing a fire extinguishing agent and is arranged outside the working cavity;
the nozzle is arranged on the wall of the working cavity and is connected with the fire extinguishing device; wherein the content of the first and second substances,
the nozzle can be in when the sensor that puts out a fire detects there is the fire source in the working chamber, to the working chamber sprays fire extinguishing agent, just the window is followed the direction of height of the cabinet body moves down and closes, exhaust system is in the open mode, so that the working chamber is in the negative pressure state.
2. A hood as in claim 1 wherein said fire extinguishing agent is perfluorohexanone.
3. A hood as claimed in claim 1 or 2, further comprising: and the air supplementing system is used for supplementing air to the working cavity, and when the fire extinguishing sensor detects that a fire source exists in the working cavity, the air supplementing system is in a closed state.
4. An exhaust cabinet according to any one of claims 1 to 3, wherein the nozzles are provided in a top chamber wall of the working chamber.
5. A hood as in claim 4 wherein the hood has an internal width W, an internal depth D, and an internal height H;
the width of the nozzle from the center line of the exhaust cabinet along the width direction of the exhaust cabinet is W1, wherein W1 is more than or equal to 0mm and less than or equal to 0.32W;
along the depth direction of the exhaust cabinet, the depth of the nozzle from the rear cavity wall of the exhaust cabinet is D1, wherein D1 is more than or equal to 0.3D and less than or equal to 0.5D;
along the height direction of the exhaust cabinet, the height between the nozzle and the top cavity wall of the exhaust cabinet is H1, wherein H1 is more than 0mm and less than or equal to 0.2H.
6. A fume hood according to claim 5 wherein,
w is more than 0mm and less than or equal to 1200mm, the number of the nozzles is one, and W1 is 0 mm; alternatively, the first and second electrodes may be,
w is more than 1200mm and less than or equal to 1800mm, the number of the nozzles is two, the width of each nozzle from the center line of the exhaust cabinet is W1, wherein W1 is more than or equal to 0.17W and less than or equal to 0.25W; alternatively, the first and second electrodes may be,
w is more than 1800mm and less than or equal to 2400mm, the number of the nozzles is three, one nozzle is arranged on the center line of the exhaust cabinet, the width of each of the rest nozzles from the center line of the exhaust cabinet is W1, and W1 is more than or equal to 0.25W and less than or equal to 0.32W.
7. A fume hood as claimed in any one of claims 1 to 6, characterized in that Qmin≤QRow boardN is less than or equal to V, wherein QRow boardRepresenting the fire extinguishing air discharge quantity, Q, of the exhaust system when the nozzles spray the extinguishing agentminThe minimum air exhaust quantity of the exhaust system when the minimum air exchange times are guaranteed is represented, N represents the air exchange times of the exhaust cabinet, V represents the volume of a working cavity of the exhaust cabinet, and the minimum air exchange times of the exhaust cabinet is 150 times/hour.
8. A hood as claimed in claim 7 wherein N is 200.
9. A hood as in any of claims 1 to 8 wherein the fire suppression means stores a volume of fire suppressant G, (V/S) x C1 x K; wherein V represents the volume of the working chamber of the exhaust cabinet, S represents the specific volume of the fire extinguishing agent, C1 represents the fire extinguishing design concentration or the inerting design concentration, and K represents the pressure correction coefficient of the room in which the exhaust cabinet is positioned.
10. A hood as claimed in claim 9 wherein the room pressure is 0Pa, K-1; the pressure of the room is-2 Pa, and K is 1.03; the pressure of the room is-5 Pa, and K is 1.063; the pressure in the room is-8 Pa, K1.08.
11. An exhaust cabinet according to any one of claims 1 to 10, wherein the fire extinguishing sensor is disposed on a top chamber wall of the working chamber and faces a bottom chamber wall of the working chamber.
12. A hood as claimed in any of claims 1 to 11, wherein the fire extinguishing sensor comprises any one or more of: photoelectric smoke detector, flame detector, temperature detector.
13. An exhaust cabinet according to any of the claims 1 to 12, characterized in that the exhaust cabinet comprises a controller, the controller is connected with the window, the air supply system, the exhaust system, the fire extinguishing sensor, the nozzle and the fire extinguishing device.
14. A fire extinguishing method for an exhaust cabinet is characterized by comprising the following steps:
detecting that a fire source exists in a working cavity of the exhaust cabinet;
controlling a window of the exhaust cabinet to move downwards along the height direction of a cabinet body of the exhaust cabinet to be closed;
controlling an exhaust system of the exhaust cabinet to be in an open state so as to enable a working cavity of the exhaust cabinet to be in a negative pressure state;
and controlling a nozzle in the working cavity of the exhaust cabinet to spray fire extinguishing agent to the working cavity of the exhaust cabinet.
15. A fire extinguishing method for a hood according to claim 14, wherein the fire extinguishing agent is perfluorohexanone.
16. A fire extinguishing method for a cabinet according to claim 14, wherein the fire extinguishing method further comprises: and controlling an air supplementing system of the exhaust cabinet to be in a closed state so as to enable a working cavity of the exhaust cabinet to be in a negative pressure state.
17. A fire extinguishing method for an exhaust cabinet as recited in claim 14, wherein a fire extinguishing sensor detects a fire source in the working chamber of the exhaust cabinet, and controls an audible and visual alarm to emit an alarm signal.
18. A fire extinguishing method for a cabinet, according to claim 14, wherein at least two fire extinguishing sensors detect the presence of a fire source in the working chamber of the cabinet, and control said nozzles to spray fire extinguishing agent into the working chamber of the cabinet.
19. A fire extinguishing method for an exhaust cabinet according to claim 16, wherein the time for controlling the air supply system of the exhaust cabinet to be in a closed state is 60 seconds, and the time for controlling the air exhaust system of the exhaust cabinet to be in an open state is 60 seconds.
20. A hood as claimed in any one of claims 14 to 19 wherein the nozzles are controlled to fire extinguishing agent in the fire extinguishing means within 10 seconds.
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| CN202111414283.0A CN113975694A (en) | 2021-11-25 | 2021-11-25 | Exhaust cabinet and fire extinguishing method |
| PCT/CN2022/077667 WO2023092877A1 (en) | 2021-11-25 | 2022-02-24 | Fume hood and fire-extinguishing method |
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| CN202111414283.0A CN113975694A (en) | 2021-11-25 | 2021-11-25 | Exhaust cabinet and fire extinguishing method |
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Cited By (2)
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|---|---|---|---|---|
| WO2023092877A1 (en) * | 2021-11-25 | 2023-06-01 | 倚世节能科技（上海）有限公司 | Fume hood and fire-extinguishing method |
| CN116585643A (en) * | 2023-07-14 | 2023-08-15 | 倚世节能科技（上海）有限公司 | Fire extinguishing method and computer storage medium |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070105494A1 (en) * | 2005-11-08 | 2007-05-10 | Esco Micro Pte Ltd | Ductless fume hood with improved filter monitoring system and extended filter life |
| ES2304844B1 (en) * | 2006-04-24 | 2009-10-29 | Telstar, S.A. | PROTECTION DEVICE FOR AIR FLOW CABINS AND AIR FLOW CABIN INCLUDING SUCH DEVICE. |
| CN209773014U (en) * | 2019-03-07 | 2019-12-13 | 广州理尔实验室设备有限公司 | Laboratory is with fire prevention fume chamber |
| CN211359986U (en) * | 2019-10-14 | 2020-08-28 | 湖北创美实验室设备有限公司 | Safe fire prevention laboratory fume chamber |
| CN213134421U (en) * | 2020-08-28 | 2021-05-07 | 重庆雅马拓科技有限公司 | Fume hood with automatic fire extinguishing function |
| CN213256188U (en) * | 2020-09-12 | 2021-05-25 | 佛山市宏测产品检测技术有限公司 | Thing networking anomaly test fume chamber |
| CN214260414U (en) * | 2020-12-23 | 2021-09-24 | 深圳市朗飞实验室建设有限公司 | Safety ventilation cabinet with automatic gas fire extinguishing device |
| CN214600937U (en) * | 2020-12-25 | 2021-11-05 | 辽宁石化职业技术学院 | Fume hood with automatic fire source detection and fire extinguishing functions |
| CN113975694A (en) * | 2021-11-25 | 2022-01-28 | 倚世节能科技（上海）有限公司 | Exhaust cabinet and fire extinguishing method |
| CN216703245U (en) * | 2021-11-25 | 2022-06-10 | 倚世节能科技（上海）有限公司 | Exhaust cabinet |
-
2021
- 2021-11-25 CN CN202111414283.0A patent/CN113975694A/en active Pending
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2022
- 2022-02-24 WO PCT/CN2022/077667 patent/WO2023092877A1/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023092877A1 (en) * | 2021-11-25 | 2023-06-01 | 倚世节能科技（上海）有限公司 | Fume hood and fire-extinguishing method |
| CN116585643A (en) * | 2023-07-14 | 2023-08-15 | 倚世节能科技（上海）有限公司 | Fire extinguishing method and computer storage medium |
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