CN117982821A - Active air suction type fire-fighting system, active air suction type fire-fighting method and bench test room - Google Patents

Abstract

The invention relates to an active air suction type fire-fighting system for a bench test room, an active air suction type fire-fighting method and the bench test room provided with the active air suction type fire-fighting system. The active air-breathing fire protection system includes a large air-breathing, sampling smoke detector that draws air distributed throughout a bench laboratory and analyzes the drawn air; a small-sized air-sampling smoke detector that extracts air around a test specimen in a bench laboratory and analyzes the extracted air; the large-sized and small-sized air-suction type air sampling smoke detector is connected to the controller in parallel and sends an analysis result to the controller; and the rack control system is connected with the controller and used for receiving the analysis result and carrying out early warning and/or alarming according to the analysis result. In case of an alarm, the gantry control system stops the test rig.

Description

Active air suction type fire-fighting system, active air suction type fire-fighting method and bench test room

Technical Field

The invention relates to the field of fire-fighting systems of bench laboratories, in particular to an active air-suction fire-fighting system for a bench laboratory, an active air-suction fire-fighting method for a bench laboratory and a bench laboratory provided with the active air-suction fire-fighting system.

Background

With the rapid development of automobile technology, the research and development investment of driving systems by various automobile enterprises is greatly increased, and meanwhile, with the increasing strictness of the requirements of customers on the quality of automobiles, the frequency of bench test of the driving systems is greatly increased. The drive system bench test works as a basis for new product development of the automobile drive system, and has a plurality of potential fire risks. Therefore, before the dangerous case, the method generally performs active fire protection through means of active air suction, early detection, monitoring, intervention and the like, and identifies and reduces the fire safety risk of the rack so as to reduce the number of fire alarm times, enhance the safety of test work and improve the test quality. This is of great importance for the development of new products of the drive system.

Existing fire protection systems for drive system bench laboratories are mainly equipped with temperature, optical, gas and particulate concentration class 4 sensors. HC alarm frequency is extremely low, and mainly smoke feeling and CO alarm are adopted. In addition, it was found from the historical data of fire alarms that the "smoke" alarm accounted for 75% and the "fire" alarm accounted for 25% as counted by alarm phenomena.

Once an open fire occurs, if a fire is extinguished using the extinguishing material, smoke generated due to the extinguishing will cause the existing fire protection system to alarm. In this case, it is difficult to actively intervene in advance in the fire. In addition, in the case of not leaking oil, there is a certain time for the drive system stage to find "smoke". If the fire extinguishing device can process in time, the occurrence of open fire can be avoided, and the fire is eliminated in a sprouting state, so that the fire extinguishing device has important significance for guaranteeing the safety of equipment and personnel.

In a bench test room of a driving system, three main methods are as follows: 1. vibration sensors are mounted to the block and cylinder head of the engine and vibration anomaly monitoring is achieved by combining a diagnostic module and a gantry control system, but this method has disadvantages in that: only full frequency values are needed, and judgment of different frequencies is lacking; the sectional judgment of different rotation speeds and torques cannot be realized; and lack of order analysis and main energy division contrast. 2. Risk identification is performed by image infrared monitoring of high temperature areas (e.g. using infrared-like images, contour detection-like images and dual-authentication imaging), but this approach has the disadvantage that: because the temperature change range of the engine test is larger and the change rate is faster, the temperature change is difficult to accurately analyze based on the infrared image; because the temperature of the exhaust gas changes and the interference is large, the false alarm rate of the appearance detection type image is high and the small fire is not easy to identify; due to the complex scene within the gantry, it is difficult to form an infrared correlation network based on dual-authentication imaging. In view of this, it can be found that the effect of infrared monitoring of the image is poor. 3. Early detection of smoke in a bench test room is achieved by constructing an air suction type smoke sensing alarm system.

In order to improve the fire protection system which is adopted by the bench test room of the current driving system, cannot find invisible smoke and dangerous situations in advance, is passive to wait, has slower response and has low sensitivity, a simple and practical active air suction type fire protection system for the bench test room needs to be designed.

Disclosure of Invention

The object of the present invention is to provide an active-aspiration fire control system for a bench test room, which can overcome the above-mentioned drawbacks, wherein the active-aspiration fire control system for a bench test room disclosed in the present invention can discover invisible smoke in advance and perform intervention treatment at an early stage of smoke by collecting and analyzing air samples in the bench test room and around a test specimen using a large-and-small-aspiration air sampling smoke detector, thereby reducing the number of fire alarm times and avoiding fire risk. In addition, the active air suction type fire control system for the bench test room disclosed by the invention can also give an alarm before a fire disaster occurs and stop the test prototype by being linked with the bench control system of the bench test room, so that the safety risk of the bench test room is reduced and further failure of test equipment is avoided.

In addition, the invention aims to solve or alleviate other technical problems in the prior art.

According to a first aspect of the present invention, the technical solution adopted by the present invention to solve the technical problem is to provide an active air suction type fire protection system for a bench laboratory, comprising: a large-scale air-sampling smoke detector that extracts air distributed throughout the bench laboratory and analyzes the extracted air; a small-sized air-sampling smoke detector that extracts air around a test specimen in the bench laboratory and analyzes the extracted air; a controller to which the large-sized air-sampling smoke detector and the small-sized air-sampling smoke detector are connected in parallel and to which an analysis result is transmitted; and a bench control system connected to the controller for receiving the analysis result and performing early warning and/or alarm according to the analysis result, wherein in case of alarm, the bench control system stops the test prototype.

Alternatively, according to one embodiment of the present invention, the large-scale air-sampling smoke detector and the small-scale air-sampling smoke detector each employ a manner of actively extracting smoke particles, and sense smoke particles that may occur in the bench test room based on a laser scattering detection principle to generate a smoke particle concentration value.

Alternatively, according to an embodiment of the present invention, the large-sized air-sampling smoke detector and the small-sized air-sampling smoke detector each store an early warning threshold value and a fire warning threshold value, and compare the smoke particle concentration value with the early warning threshold value and the fire warning threshold value, and generate an early warning signal and a fire warning signal based on the comparison result.

Alternatively, according to one embodiment of the present invention, the large-scale air-sampling smoke detector and the small-scale air-sampling smoke detector are each provided with an air flow rate sensor for monitoring the speed of an air sample flowing therethrough to determine whether a malfunction occurs, and in the event of a malfunction, generate a malfunction signal.

Alternatively, according to one embodiment of the present invention, a plurality of first air suction lines and one first air discharge line extend from their respective air inlet and air outlet on one side of the large air suction type air sampling smoke detector, and one second air suction line and one second air discharge line extend from their respective air inlet and air outlet on one side of the small air suction type air sampling smoke detector.

Alternatively, according to one embodiment of the present invention, each of the plurality of first air suction lines has a plurality of sampling holes arranged therein at intervals, the plurality of first air suction lines are provided around an exhaust pipe, a supercharger, and/or a ceiling of the bench test chamber, and the one second air suction line is arranged around the test specimen and its exhaust system.

Optionally, according to an embodiment of the present invention, a plurality of adjusting valves are disposed at the air inlet end of the large-scale air-suction type air-sampling smoke detector for controlling the suction amount of the pipeline to meet the sensitivity requirement of the large-scale air-suction type air-sampling smoke detector.

According to a second aspect of the present invention, there is provided an active-inhalation fire-fighting method for bench laboratories based on the active-inhalation fire-fighting system as described above, comprising the steps of: sampling air distributed throughout the bench test chamber and air surrounding a test prototype in the bench test chamber to obtain a soot concentration value; comparing the smoke particle concentration value with an early warning threshold value, and judging whether an early warning signal is generated or not based on a comparison result; when the smoke particle concentration value is greater than or equal to the early warning threshold value, generating the early warning signal, comparing the smoke particle concentration value with a fire warning threshold value, and judging whether a fire warning signal is generated or not based on a comparison result; and when the smoke particle concentration value is greater than or equal to the fire threshold value, generating the fire alarm signal, and stopping the test prototype and alarming the fire alarm.

Optionally, according to an embodiment of the present invention, the method further comprises arranging a pipeline, and adjusting the pipeline suction flow rate by using an adjusting valve to meet the sensitivity requirement of the smoke detector.

According to a third aspect of the present invention there is provided a bench test room having an active air-breathing fire-fighting system for a bench test room as described above.

Compared with the prior art, the active air suction type fire control system for the bench test room is obvious in effect. The active air suction type fire control system can not only discover invisible smoke in advance and perform intervention treatment in the early stage of the smoke so as to reduce the number of fire control alarm times, but also can be linked with a rack control system to alarm and stop so as to reduce the safety risk of a rack laboratory. Therefore, the active air suction type fire-fighting system is accurate, efficient, high in sensitivity, stable, simple in structure, convenient to use and wide in application range.

The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the invention will be apparent from the description and drawings, and from the claims.

Drawings

The present invention may be described in more detail by way of embodiments with reference to the accompanying drawings, which are not drawn to scale, wherein:

FIG. 1 shows a schematic diagram of an actively aspirated fire protection system for a bench laboratory according to an embodiment of the invention; and

FIG. 2 illustrates a flow chart of an active-gettering fire method for a bench laboratory according to one embodiment of the invention.

Detailed Description

It is to be understood that, according to the technical solution of the present invention, those skilled in the art may propose various alternative structural modes and implementation modes without changing the true spirit of the present invention. Accordingly, the following detailed description and drawings are merely illustrative of the invention and are not intended to be exhaustive or to limit the invention to the precise form disclosed.

Terms of orientation such as up, down, left, right, front, rear, front, back, top, bottom, etc. mentioned or possible to be mentioned in the present specification are defined with respect to the configurations shown in the drawings, which are relative concepts, and thus may be changed according to different positions and different use states thereof. These and other directional terms should not be construed as limiting terms. Furthermore, the terms "first," "second," "third," and the like are used for descriptive and distinguishing purposes only and are not to be construed as indicating or implying a relative importance of the corresponding components.

As best shown in fig. 1, a schematic diagram of an active-air fire protection system for a bench laboratory according to one embodiment of the invention is provided. As can be seen in fig. 1, the active air-breathing fire-fighting system consists of seven parts, namely a large air-breathing sampling smoke detector 1, a small air-breathing sampling smoke detector 2, air-breathing pipelines 3 and 8, a regulating valve 4, a controller 5, air-exhausting pipelines 6 and 9 and a bench control system 7.

The large-sized air-sampling smoke detector 1 and the small-sized air-sampling smoke detector 2 adopt a mode of actively extracting smoke particles, and the smoke particles possibly existing in the bench test room are sensed based on a laser scattering detection principle. Specifically, each of the large-sized air-sampling smoke detector 1 and the small-sized air-sampling smoke detector 2 includes a suction pump, a laser source, a detection chamber, a light receiver, and a extinction chamber located below the detection chamber. In operation, an air sample pumped via a getter pump enters the detection chamber and infrared laser light emitted from a laser source as a measuring beam is irradiated into the detection chamber. The smoke particles in the air sample collected in the detection chamber then generate scattered light for the infrared laser light, and this scattered light is collected by a corresponding light collector onto the light receiver. Finally, the scattered light causes the light receiver to generate a current detection signal proportional to the intensity of the scattered light, and the smoke particle concentration value is displayed by a display screen of the detector. In addition, the extinction cavity is used for carrying out extinction treatment on redundant measuring light beams.

In addition, the large-sized air-sampling smoke detector 1 and the small-sized air-sampling smoke detector 2 each store an early warning threshold value and a fire threshold value, and the detected smoke particle concentration value can be compared with the early warning threshold value and the fire threshold value, and an early warning signal and a fire signal can be generated based on the comparison result. Furthermore, both the large-sized air-sampling smoke detector 1 and the small-sized air-sampling smoke detector 2 may be provided with an air flow rate sensor for monitoring the speed of the air sample flowing therethrough to determine whether a malfunction occurs, and in the event of a malfunction, generate a malfunction signal. If the flow rate of the air sample is not within the preset normal range, it can be determined that there is a fault in the smoke detectors 1 and 2. The early warning signal, the fire warning signal and the fault signal can be transmitted to operators of the bench test room in the forms of sound, light and text information.

For example, the laser source may be produced by an infrared laser diode, and the measuring beam produced by the laser source has a wavelength of 850nm and a power of 5 mW. Of course, the air-breathing smoke detector of the present invention may employ LED light sources in addition to laser sources, depending on the particular application and situation in which the present invention is used.

As shown in fig. 1, a plurality of first air suction lines 3 (e.g., two first air suction lines 3) and one first air discharge line 6 extend from their respective air inlet and air outlet on one side of the large air suction type air sampling smoke detector 1, and at the same time, one second air suction line 8 and one second air discharge line 9 extend from their respective air inlet and air outlet on one side of the small air suction type air sampling smoke detector 2. Of course, the air-breathing air-sampling smoke detector of the present invention may include any other number and corresponding arrangement of air-breathing and air-intake lines in addition to the number of air-breathing and air-intake lines listed above, so long as the air-breathing and air-intake lines are capable of meeting the air-breathing and air-intake requirements of a particular application and scenario.

In addition, regarding the plurality of first air suction lines 3, since the large-sized air-sampling smoke detector 1 is mainly used to suck air in the bench test chamber and monitor the sucked air sample for finding invisible smoke in advance, the plurality of first air suction lines 3 may be arranged in a horizontal and/or vertical tube arrangement throughout the bench test chamber and provided with a plurality of sampling holes 10 arranged at certain intervals. The number of sampling holes 30 may be determined by the length of the first suction line 3. Typically, for example, two sampling holes 10 are spaced apart by 2 meters, and a plurality of sampling holes 10 are uniformly arranged at the same interval.

Still further, the plurality of first air suction lines 3 may be disposed in the bench test room, and the first air discharge line 6 may be disposed in or out of the bench test room, discharging the monitored air back to or out of the bench test room. Optionally, a plurality of first suction lines 3 may be provided around the exhaust pipe, booster and/or ceiling of the bench test chamber.

Between the large-sized air-sampling smoke detector 1 and the leftmost sampling hole 10 in one first air-suction pipeline 3, i.e. at the air-intake end of the large-sized air-sampling smoke detector 1, a corresponding regulating valve 4 is arranged for controlling the pipeline air-suction amount to meet the sensitivity requirement of the air-sampling smoke detector. The regulating valve 4 receives a control signal from the controller 5 and is operated by power to vary the flow of the air sample in the first suction line 3. Optionally, at the air inlet end of the small-sized air-sampling smoke detector 2, a corresponding adjusting valve 4 may be provided to receive a control signal from the controller 5 and to change the flow rate of the air sample in the second air-suction line 8 by means of power operation, so as to meet the sensitivity requirement of the small-sized air-sampling smoke detector 2.

Communication between the regulator valve 4 and the controller 5 may be achieved via wired or wireless means, wherein the wireless means is based on a specific connection protocol, such as WIFI, 4G network, 5G network, etc. Alternatively, the regulating valve 4 may be divided into: the hydraulic control valve comprises a manual control valve, a pneumatic control valve, an electric control valve and a hydraulic control valve, wherein the pneumatic control valve takes compressed air as a power source, the electric control valve takes electricity as a power source and the hydraulic control valve takes pressure of liquid media (such as oil and the like) as power.

Furthermore, regarding the second air suction line 8, since the small air suction type air sampling smoke detector 2 is mainly used for monitoring the invisible smoke around the test specimen, the second air suction line 8 may be disposed around the test specimen and its exhaust system, and the number thereof is usually one. In view of this, the second suction line 8 may not be provided with a plurality of sampling holes, and air sampling is performed only by the pipe end of the second suction line 8 provided in the vicinity of the test specimen and its exhaust system.

Likewise, the second suction line 8 may be disposed within the bench test chamber and the second discharge line 9 may be disposed within or outside the bench test chamber to discharge the monitored air back into or out of the bench test chamber.

The other side of the large air-aspiration air-sampling smoke detector 1 and the other side of the small air-aspiration air-sampling smoke detector 2 are both connected to a controller 5, and the controller 5 is in turn connected to a gantry control system 7. The connection is similar to the connection between the controller 5 and the regulator valve 4, and wired or wireless connections may also be used.

Specifically, the controller 5 is mainly configured to receive the comparison and analysis results (i.e., the early warning signal, the fire warning signal, and/or the fault signal) from the large air-aspiration type air-sampling smoke detector 1 and/or the small air-aspiration type air-sampling smoke detector 2, and transmit the signals to the rack control system 7 to realize early warning, alarming, and stopping of the testing machine. At the same time, the gantry control system 7 may take a shutdown action to the drive system gantry after receiving the fire alarm signal from the large air-aspiration sampling smoke detector 1 and/or the small air-aspiration sampling smoke detector 2, and upon receiving the fault signal from the large air-aspiration sampling smoke detector 1 and/or the small air-aspiration sampling smoke detector 2, notify an operator of the gantry laboratory to repair and/or replace the large air-aspiration sampling smoke detector 1 and/or the small air-aspiration sampling smoke detector 2.

Next, the operation of the active air suction type fire protection system for a bench laboratory shown in fig. 1 according to an embodiment of the present invention will be described in detail.

As shown in fig. 2, a flow chart of an active-suction fire method 100 for a bench laboratory is provided according to one embodiment of the invention. First, at a first step 101, the method 100 comprises arranging a pipeline. In particular, a plurality of first air suction lines 3 extending from an air inlet on one side of the large air suction type air sampling smoke detector 1 may be arranged in the bench test chamber, and in particular, provided around an exhaust pipe, a supercharger and/or a ceiling of the bench test chamber, while a first exhaust line 6 extending from an air outlet on the same side of the large air suction type air sampling smoke detector 1 may be arranged in or out of the bench test chamber to exhaust the monitored air back to or out of the bench test chamber. Meanwhile, one second suction duct 8 extending from the air inlet on one side of the small suction type air sampling smoke detector 2 may be disposed in the bench test chamber, and in particular, may be disposed around the test specimen and its exhaust system, while a second exhaust duct 9 extending from the air outlet on the same side of the small suction type air sampling smoke detector 2 may be disposed in or out of the bench test chamber to exhaust the monitored air back to or out of the bench test chamber.

At a second step 102, the method 100 includes adjusting the line intake air flow using an adjustment valve to meet the sensitivity requirements of the smoke detector. That is, the air in the bench test room is extracted as the test air sample via the plurality of sampling holes 10 arranged at intervals on each of the plurality of first suction lines 3, and the pipe ends of the second suction lines 8. Each of the plurality of air intake ends of the large air-aspiration type air-sampling smoke detector 1, and optionally the regulating valve 4 at the air intake end of the small air-aspiration type air-sampling smoke detector 2 throttle the test air sample to different extents to obtain a plurality of test air samples of different flow rates. Then, after receiving the plurality of test air samples at different flow rates, the large-scale aspirated air sampling smoke detector 1 and, optionally, the small-scale aspirated air sampling smoke detector 2 analyze the plurality of test air samples to derive a plurality of test signals based on the smoke particle concentration values, and send the plurality of test signals to the controller 5. The controller 5 compares the plurality of test signals to determine the throttle that meets the sensitivity requirements of the air-aspiration air-sampling smoke detector and generates a corresponding control signal. Finally, the regulating valve 4 receives a control signal from the controller 5 and operates by means of power to vary the flow of air in the first suction line 3 and optionally in the second suction line 8.

Next, at a third step 103, the method 100 includes sampling air. Specifically, the air sample around the exhaust pipe, the supercharger, and/or the ceiling of the bench test room, and the air sample in the vicinity of the test specimen and the exhaust system thereof are extracted via a plurality of sampling holes 10 arranged at intervals on each of the plurality of first air intake pipes 3, and the pipe ends of the second air intake pipes 8. The large-sized air-sampling smoke detector 1 and the small-sized air-sampling smoke detector 2 are based on the laser scattering detection principle to sense the smoke particles possibly occurring in the air sample so as to obtain a smoke particle concentration value and the smoke particle concentration value is displayed by a display screen of the detector. In addition, the laser sources used by the large-sized air-sampling smoke detector 1 and the small-sized air-sampling smoke detector 2 can be generated by infrared laser diodes, and the measuring beam generated by the laser sources has a wavelength of 850nm and a power of 5 mW.

Then, at a fourth step 104, the method 100 includes comparing the soot concentration value to an early warning threshold. In particular, the large-sized air-sampling smoke detector 1 and the small-sized air-sampling smoke detector 2 each store an early-warning threshold value in a memory, and the detected smoke particle concentration value may be compared with the early-warning threshold value and an early-warning signal may be generated based on the comparison result. For example, the pre-warning threshold value related to the soot concentration value may be 5-8% obs/m, and when the detected soot concentration value is less than the pre-warning threshold value, the flow proceeds from the fourth step 104 to the sixth step 106. At a sixth step 106, no warning signal is generated. That is, the large-sized air-sampling smoke detector 1 and/or the small-sized air-sampling smoke detector 2 do not generate an early warning signal.

At a fifth step 105, the method 100 includes generating an early warning signal. When the detected smoke particle concentration value is greater than or equal to the above-mentioned early warning threshold value (i.e., 5-8% obs/m), the large air-aspiration type air-sampling smoke detector 1 and/or the small air-sampling smoke detector 2 generate an early warning signal, and the controller 5 receives the early warning signal from the large air-aspiration type air-sampling smoke detector 1 and/or the small air-sampling smoke detector 2 and transmits the above-mentioned signal to the gantry control system 7 to realize early warning of fire.

Finally, at a seventh step 107, the method 100 includes comparing the smoke particle concentration value to a fire threshold. Both the large-sized air-aspiration type air-sampling smoke detector 1 and the small-sized air-sampling smoke detector 2 store fire threshold values in a memory. For example, the fire threshold value associated with the soot concentration value may be 9-11% obs/m, and in the event that the large air-breathing air-sampling smoke detector 1 and/or the small air-sampling smoke detector 2 generate an early warning signal, the large air-breathing air-sampling smoke detector 1 and/or the small air-sampling smoke detector 2 further compare the soot concentration value to the fire threshold value. When the detected smoke particle concentration value is less than the fire threshold, the flow proceeds from the seventh step 107 to a ninth step 109. At a ninth step 109, no fire alarm signal is generated. That is, the large air-aspiration type air-sampling smoke detector 1 and/or the small air-aspiration type air-sampling smoke detector 2 do not generate a fire alarm signal.

Still further, at an eighth step 108, the method 100 includes generating a fire alarm signal and shutting down the test specimen and alarming for a fire. When the detected smoke particle concentration value is greater than or equal to the fire alarm threshold (i.e., 9-11% obs/m), the large air-aspiration air-sampling smoke detector 1 and/or the small air-sampling smoke detector 2 generate a fire alarm signal, and the controller 5 receives the fire alarm signal from the large air-aspiration air-sampling smoke detector 1 and/or the small air-sampling smoke detector 2 and transmits the signal to the gantry control system 7. The rack control system 7 may then shut down the test prototypes in the rack laboratory and alert to an impending fire after receiving a fire signal from the large air-aspiration sampling smoke detector 1 and/or the small air-aspiration sampling smoke detector 2.

Optionally, in performing the second step 102, i.e. adjusting the line suction flow with the adjusting valve 4, the method 100 further comprises determining if a malfunction has occurred. That is, the large-sized air-sampling smoke detector 1 and the small-sized air-sampling smoke detector 2 are each provided with an air flow rate sensor for monitoring the speed of the air sample flowing therethrough to determine whether a malfunction occurs, and in the event of a malfunction, a malfunction signal is generated. If the flow rate of the air sample is not within the preset normal range, it can be determined that there is a fault in the large air-aspiration type air-sampling smoke detector 1 and the small air-aspiration type air-sampling smoke detector 2. The gantry control system 7, upon receiving a failure signal from the large-scale air-aspiration sampling smoke detector 1 and/or the small-scale air-aspiration sampling smoke detector 2, notifies an operator of the gantry laboratory to repair and/or replace the large-scale air-aspiration sampling smoke detector 1 and/or the small-scale air-aspiration sampling smoke detector 2.

The active aspirating fire-fighting system for bench laboratories described above may also include other necessary components to perform its functions (e.g., filters provided in the first aspirating line 3 and/or the second aspirating line 8 for filtering large diameter particles in the air sample, battery cells for providing electrical power to the large aspirating air sampling smoke detector 1 and the small aspirating air sampling smoke detector 2, etc.), which are well known to those skilled in the art and will not be described in detail herein.

Compared with the prior art, the active air suction type fire control system for the bench test room has the following beneficial effects. The active air suction type fire control system for the bench test room disclosed by the invention can discover invisible smoke in advance and perform intervention treatment in the early stage of smoke by utilizing the air sampling smoke detector with the size to collect and analyze air samples in the bench test room and around the test prototype, thereby reducing the fire control alarm times and avoiding the occurrence of fire control risks. In addition, the active air suction type fire control system for the bench test room disclosed by the invention can also give an alarm before a fire disaster occurs and stop the test prototype by being linked with the bench control system of the bench test room, so that the safety risk of the bench test room is reduced and further failure of test equipment is avoided.

The invention also provides a bench test chamber machine comprising the active air suction type fire control system. Thanks to the use of the active aspirating fire system for bench test chambers according to the invention, the bench test chamber has lower fire and safety risks and its production and manufacturing costs are further reduced.

It is to be understood that the above description is intended to be illustrative of the invention and not restrictive. It should be noted that the present invention may be subject to several improvements, modifications and variations to those skilled in the art, and such improvements, modifications and variations are considered to fall within the scope of the present invention without departing from the spirit of the invention.

Parts list

1. Large-sized air suction type air sampling smoke detector

2. Small-sized air suction type air sampling smoke detector

3. First air suction pipeline

4. Regulating valve

5. Controller for controlling a power supply

6. First exhaust pipeline

7. Rack control system

8. Second air suction pipeline

9. Second exhaust pipeline

10. Sampling hole

100. Method of

101. First step

102. A second step of

103. Third step

104. Fourth step

105. Fifth step

106. Sixth step

107. Seventh step

108. Eighth step

109. And a ninth step.

Claims (10)

1. An active air-breathing fire-fighting system for a bench laboratory, comprising:

A large-scale air-sampling smoke detector that extracts air distributed throughout the bench laboratory and analyzes the extracted air;

a small-sized air-sampling smoke detector that extracts air around a test specimen in the bench laboratory and analyzes the extracted air;

A controller to which the large-sized air-sampling smoke detector and the small-sized air-sampling smoke detector are connected in parallel and to which an analysis result is transmitted; and

And the rack control system is connected with the controller and used for receiving the analysis result and carrying out early warning and/or alarming according to the analysis result, wherein in the case of alarming, the rack control system stops the test prototype.

2. The active-aspiration fire control system for a bench laboratory of claim 1, wherein the large-scale aspirated-air-sampling smoke detector and the small-scale aspirated-air-sampling smoke detector each employ a manner of actively extracting smoke particles, and the smoke particles that may occur in the bench laboratory are sensed based on a laser-light scattering detection principle to generate smoke particle concentration values.

3. The active-fire-aspiration system for bench laboratories according to claim 2, wherein the large-scale-aspiration-type air-sampling smoke-sensing detector and the small-scale-aspiration-type air-sampling smoke-sensing detector each store an early-warning threshold and a fire-warning threshold, and compare the smoke-particle concentration value with the early-warning threshold and the fire-warning threshold, and generate an early-warning signal and a fire-warning signal based on the comparison result.

4. The active-aspiration fire control system for a bench laboratory of claim 1, wherein the large-scale aspiration air-sampling smoke detector and the small-scale aspiration air-sampling smoke detector are each provided with an air flow rate sensor for monitoring the velocity of an air sample flowing therethrough to determine if a malfunction has occurred and, in the event of a malfunction, to generate a malfunction signal.

5. The active-aspiration fire control system for a bench laboratory of claim 1, wherein a plurality of first aspiration lines and one first vent line extend from their respective air inlet and air outlet on one side of the large aspiration air sampling smoke detector and one second aspiration line and one second vent line extend from their respective air inlet and air outlet on one side of the small aspiration air sampling smoke detector.

6. The active-aspiration fire control system for a bench laboratory of claim 5, wherein each of the plurality of first aspiration lines has a plurality of sampling holes disposed therein at intervals, the plurality of first aspiration lines being disposed around an exhaust pipe, a booster and/or a ceiling of the bench laboratory, and the one second aspiration line being disposed around the test specimen and its exhaust system.

7. The active aspiration fire control system for a bench laboratory of claim 5, wherein a plurality of regulating valves are provided at the air inlet end of the large aspiration air sampling smoke detector for controlling the amount of line aspiration to meet the sensitivity requirements of the large aspiration air sampling smoke detector.

8. An actively aspirated fire protection method for a bench laboratory based on the actively aspirated fire protection system of any of claims 1-7, comprising the steps of:

Sampling air distributed throughout the bench test chamber and air surrounding a test prototype in the bench test chamber to obtain a soot concentration value;

comparing the smoke particle concentration value with an early warning threshold value, and judging whether an early warning signal is generated or not based on a comparison result;

When the smoke particle concentration value is greater than or equal to the early warning threshold value, generating the early warning signal, comparing the smoke particle concentration value with a fire warning threshold value, and judging whether a fire warning signal is generated or not based on a comparison result;

and when the smoke particle concentration value is greater than or equal to the fire threshold value, generating the fire alarm signal, and stopping the test prototype and alarming the fire alarm.

9. The active aspiration fire control method for a bench laboratory of claim 8, further comprising arranging piping and adjusting the piping aspiration flow rate with an adjusting valve to meet the sensitivity requirements of the smoke detector.

10. Bench laboratory characterized in that it has an active aspirating fire system for bench laboratories according to any of claims 1 to 7.