485 results about "Gaseous detection device" patented technology

The invention relates to the technical field of microenvironment gas monitoring, in particular to a gas monitoring and early warning method for cultural relics in a corrosive microenvironment, which comprises the following steps: arranging a gas detection device in a cultural relic preservation area, the method comprises the following steps: covering a space in which a cultural relic is located to obtain gas related data in the space, and setting a data interval conforming to a storage standard on the basis; and the data transmission module is used for transmitting the screened gas related data acquired by the gas detection device to the data processing and analyzing unit. In the invention, through the four steps of arranging the gas detection device, transmitting data, analyzing and processing the data and starting the early warning module, the problem that the traditional cultural relic gas monitoring method mostly adopts a simple sensor to be combined with manual regular data checking is solved; as the gas concentration change cannot be comprehensively mastered in real time and an intelligent analysis, judgment and early warning mechanism is lacked, the corrosion risk of the cultural relics is difficult to control.

The utility model relates to a high-voltage cable buffer layer ablation characteristic gas detection device which comprises a gas acquisition unit, a gas detection unit, a data processing unit and an alarm unit, the gas collection unit comprises a circulating pump, a vacuum pump, a sampling gas cylinder, a pressure sensor and a plurality of valves, the gas detection unit comprises two detection modules, the gas inlet pipe is connected with a first electromagnetic valve, then is connected with the sampling gas cylinder and is connected with the circulating pump through a second electromagnetic valve, and the circulating pump is connected with the two detection modules through an electromagnetic three-way switching valve. An outlet of the sampling gas cylinder is connected with a third electromagnetic valve, then connected with an inlet of a vacuum pump, connected with a fourth electromagnetic valve and then connected with two detection modules at the same time; the first detection module is composed of a gas concentration sensor, a temperature sensor and a humidity sensor, and the second detection module is a gas sensor array. The device can perform field detection on gas generated in the ablation process of the buffer layer of the high-voltage cable, so that potential faults of the cable can be found and early warned in time.

The present invention relates to the field of ring network box technology, and discloses an intelligent primary and secondary fusion ring network box, comprising an outer box and multiple inner boxes arranged in the outer box, the outer box's top cover, box side walls, box bottom tray and box back wall are all hollow structures, multiple exhaust fans are arranged on the inner plate of the box top cover, each exhaust fan is located above the corresponding inner box top air outlet, the cavity in the box top cover is divided into multiple separate upper ventilation cavities by multiple upper partition plates, each exhaust fan is connected upward to a different ventilation cavity, the cavity in the box back wall is divided into multiple separate rear ventilation cavities by a rear partition plate, the rear ventilation cavity in each box back wall is connected to the corresponding upper ventilation cavity in the box top cover to form a separate ventilation cavity, and a gas detection device is respectively arranged in each ventilation cavity. It has a block-type ventilation and heat dissipation system and a block-type detection system, has good waterproof, moisture-proof, anti-collision and anti-leakage effects, and optimizes the wiring layout.

The invention relates to the technical field of photoacoustic spectrometry, in particular to a gas detection device and method based on a 3D printing Helmholtz photoacoustic cell, and is suitable for the fields with load requirements such as unmanned aerial vehicle-mounted gas monitoring platforms. In order to overcome the problems of large volume, heavy weight, complex structure and low integration level of a photoacoustic gas sensor in the prior art, the lightweight Helmholtz photoacoustic cell structure manufactured based on 3D printing comprises a sound wave generation cavity, a small-diameter connecting pipe and a detection cavity which are integrally formed, an optical reflection unit is integrated in the sound wave generation cavity, and the optical reflection unit is integrated in the detection cavity. Two concave reflectors are arranged to reflect incident light beams for 160 times, a laser, an optical fiber collimator, a pre-amplifier, a lock-in amplification circuit board, a notebook computer and a current temperature control module are arranged outside, and the concentration of gas to be detected is obtained through analysis and processing of the notebook computer.

The invention provides an anti-explosion valve, a gas detection device, an energy storage system, an energy storage power station and a control method, and relates to the technical field of energy storage safety. The explosion-proof valve comprises an explosion-proof valve shell used for packaging an explosion-proof valve assembly, a pressure color-changing sensor and a pressure transmitter; the anti-explosion valve assembly comprises an anti-explosion valve top cover and an anti-explosion valve pressure sensing stroke mechanism, and the anti-explosion valve pressure sensing stroke mechanism is fixedly connected with the anti-explosion valve top cover so that the anti-explosion valve pressure sensing stroke mechanism can operate and eject the anti-explosion valve top cover open when being stressed. The pressure color changing sensor is electrically connected with the pressure transmitter, and the pressure color changing sensor is used for collecting air pressure change data, converting air pressure change into voltage change data to generate color change information and transmitting the pressure change data to the pressure transmitter; and the pressure transmitter is used for converting the pressure change data into electric signal change data, processing the electric signal change data and sending the processed electric signal change data to the upper computer. According to the anti-explosion valve, the fire-fighting monitoring problem of the high-protection liquid cooling unit box is solved.

The invention discloses a photoacoustic spectrum trace gas detection device and method based on a secondary demodulation technology. The device comprises a tunable laser, a laser collimation device, a focusing lens, a gas chamber, a quartz tuning fork resonance circuit, a first lock-in amplifier, a trigger capture circuit, a phase modulation circuit, a second lock-in amplifier and a control and signal acquisition device. In the aspect of automatic tracking of the frequency, the quartz tuning fork is integrated into an oscillator circuit, and automatic tracking of the laser modulation frequency is achieved. The oscillator circuit can automatically adjust the output according to the current resonant frequency of the quartz tuning fork, and ensures that the laser is always modulated at the optimal frequency. In the aspect of continuous phase modulation, traditional fixed phase setting is replaced, the phases of electric excitation and photoacoustic excitation are continuously modulated, and pure photoacoustic signals are separated by using two lock-in amplifiers, so that a complex phase calibration process is avoided, and the accuracy and stability of signal detection are improved.

The invention provides a battery thermal runaway test system, which comprises a battery, a gas outlet pipe, a first thermocouple, a second thermocouple, a first gas detection device, a gas mass flow meter, a voltage detection device, a pressure detection device and the like, the second end of the gas outlet pipe is communicated with an inlet of a gas mass flowmeter, a second thermocouple is arranged at an outlet of the gas mass flowmeter, and a first gas detection device is arranged at the outlet of the gas mass flowmeter. According to the invention, a plurality of parameter measuring devices are arranged on an air flow spraying path of the battery pressure release valve, so that synchronous acquisition of key parameters such as voltage, expansive force, spraying speed, gas concentration and temperature in the thermal runaway process of the battery is realized, and the problems of single traditional test parameter and asynchronous data are solved; and the multi-physical field coupling data of the whole thermal runaway process can be completely obtained.

A sensing element for detecting a target gas or gases is disclosed. The element includes a pair of interdigitated electrodes, with a gap between each electrode in the pair. A high surface area metal oxide nanomaterial decorated with a noble metal is deposited on interdigitated electrode pair to bridge the gap. The surface area of the metal oxide nanomaterial is greater than 100m2 / g and the size of the metal oxide nanomaterial is within the range of 100-200nm. The resistance across the pair of electrodes varies when the metal oxide nanomaterial binds with the target gas or gasses. From this sensing element, sensor chips and sensor modules may be constructed to detect multiple gases.

The invention provides a control method of semiconductor equipment and the semiconductor equipment. The control method of the semiconductor equipment comprises a purging step executed in a gas switching interval of two process gases in a gas transmission pipeline, and the purging step comprises the following steps: a control module controls a purging gas control piece to enable the gas transmission pipeline to introduce and discharge purging gas so as to carry out initial purging operation; the gas detection device detects gas concentration information in the gas conveying pipeline and sends the gas concentration information to the control module, and the control module judges whether to carry out delayed purging operation or not according to the gas concentration information until the gas concentration in the gas conveying pipeline does not exceed a preset gas concentration threshold value; and the control module obtains the initial purging parameters of the initial purging operation of the (N + 1) th cycle according to the purging parameters of the initial purging operation of the Nth cycle and the purging parameters of the delayed purging operation of the Nth cycle. According to the invention, real-time self-adaptive adjustment of the initial purging operation of each cycle is realized, and cross contamination of process gas is effectively reduced or avoided.

According to one embodiment, a gas detection device includes a driver section, an element section, a sensor, and a detector. The driver section includes a first driver and a second driver. The element section includes a first laser and a second laser. The first laser is configured to be driven by the first driver to emit a first beam. A first wavelength of the first beam is configured to change at a first frequency. The second laser is configured to be driven by the second driver to emit a second beam. A second wavelength of the second beam is configured to change at a second frequency. The second frequency is different from the first frequency. The second wavelength is different from the first wavelength. The sensor is configured to detect a received beam based on the first beam and the second beam.

The invention relates to the technical field of gas detection devices, in particular to a closed automatic detection device for product release gas. The closed automatic detection device comprises a machine table provided with a detection cavity; the interior of the detection cavity is slidably connected with a carrying table through a driving assembly, and the carrying table is used for opening and closing the front end of the detection cavity; wherein the upper part of the interior of the detection cavity is also provided with a fan cover, the interior of the fan cover is fixedly provided with a detection assembly and an air inducing assembly, the carrying platform which can be moved is used for placing a to-be-detected product, and the detection cavity can be closed after the carrying platform is reset, so that the gas of the internal product can be detected, and meanwhile, the detection efficiency is improved. When the carrying platform is reset, the floating door assemblies on the two sides can be further opened, at the moment, the two sides of the detection cavity are communicated with the external environment, when the air inducing assembly works, gas in the current environment can be detected, in this way, internal closed detection and current environment gas detection in the field are achieved, and the internal mode and the external mode are achieved.

The present disclosure relates to a gas detection device and a gas detection method which are capable of detecting N target gases in a gas sample. The gas sample is fed into a measuring chamber. M detectors each generate a signal which correlates to the concentration of at least one of the N target gases to be detected in the gas sample. A determiner comprises M inputs and N outputs. A signal, which depends on the signal of the associated measuring detector, is applied at each input of the determiner. Each output supplies information on the concentrations of the associated target gas. The determiner is trained by applying a learning method to a sample with a plurality of sampling elements. Each sample element contains M values for M signals from measuring detectors and N values of N target gas concentrations.

This invention relates to the field of gas detection technology, and more particularly to a gas detection device based on photoacoustic spectroscopy. The device comprises a laser emitting component, a first photoacoustic cell, an acoustic signal detection component, a signal amplification component, a phase detection component, and a visible light emitting component. The output end of the laser emitting component is aligned with the incident end of the first photoacoustic cell. The acoustic signal detection component is housed within the first photoacoustic cell, and its output end is connected to the input end of the signal amplification component. The output end of the signal amplification component is connected to the input end of the phase detection component. The output end of the phase detection component is connected to the laser emitting component. The visible light emitting component emits visible light towards the exit end of the first photoacoustic cell. The visible light passes through the first photoacoustic cell and propagates towards the laser emitting component, forming a calibration optical path. By adjusting the positions of the laser emitting component and the first photoacoustic cell according to the calibration optical path, the calibration of the detection optical path is achieved.

The utility model provides a leak detection mechanism which comprises a bottom plate, a sealing cover, a sealing cover lifting driving device, at least one layer of battery cell carrying disc, a mounting frame and a sealing cover guide column assembly, the battery cell carrying disc is arranged on the bottom plate and used for placing battery cells, and the sealing cover is arranged above the bottom plate through the sealing cover guide column assembly and used for lifting the sealing cover. The sealing cover lifting driving device is used for driving the sealing cover to seal the battery cell carrying disc on the bottom plate, at least one battery cell placing groove is formed in the battery cell carrying disc, and a gas detection device is arranged on the bottom plate and is used for detecting whether air in the sealing cover contains electrolyte molecules or not. By combining the sealing cover, the lifting driving device, the battery cell carrying disc and the gas detection technology, efficient, lossless and accurate leakage detection of the battery cell is achieved, and the high-standard requirement of the new energy industry for the quality of the battery cell is met.

A system for cleaning, zeroing, and preventing air pollution in indoor space includes several gas detection devices, a central control monitoring device, and several gas exchange and filtration devices. The gas detection devices detect and output indoor and outdoor air pollution data. The central control monitoring device receives the outdoor and indoor air pollution data to perform an intelligent computation and comparison, locate an air pollution location in the indoor space, and transmit a control command intelligently. Each of the gas exchange and filtration devices is combined with a smart switch for the control command to control the gas exchange and filtration devices to be enabled, so that the air pollution is filtered and exchanged by the gas exchange and filtration devices, thereby allowing the indoor air pollution data detected by the gas detection devices in the indoor space to be a safety detection value.

The invention discloses an ultrafast and high-sensitivity gas detection device and method based on gas nonlinear optics. The device comprises a high-power laser light source module, a light flux cell and a signal processing module. The light flux cell is of an integrated hollow structure, a high-reflectivity mirror face is arranged in the light flux cell to form a closed light path, laser enters the cell through an incidence hole at a certain incidence angle, 50-meter-level long-optical-path accumulation is achieved through multiple times of reflection, and the nonlinear effect excitation threshold value is effectively reduced. The light spot path is changed by adjusting the incident angle, the signal intensity is obviously enhanced by combining the nonlinear effect, and the detection limit reaches ppb level. The signal processing module extracts a target frequency component through phase-locked amplification, separates frequency domain aliasing signals in combination with wavelet transform, and reconstructs a complete nonlinear spectrum through Fourier transform. The device has the advantages of stable structure, high sensitivity, strong interference resistance and the like, and is suitable for environment trace gas monitoring and volatile organic compound early warning.

The application provides a gas sampling joint and a gas detection device, the joint comprising a sampling unit, an air inlet unit and an air outlet unit; a pressure relief hole is arranged on the sampling unit; the air inlet unit is communicated to the bottom of the sampling unit; and the air outlet unit is communicated to the top of the sampling unit. The device comprises the joint as described above. The beneficial effects of the application include: effectively solving the problem of sampling port pressure change caused by the mismatch between the gas source gas volume and the sampling volume when the gas detection equipment is sampling or correcting, avoiding the sensitivity change caused by the change of the gas pressure in the gas circuit of the detection equipment, and helping to improve the stability and accuracy of the gas detection result. Meanwhile, the whole joint design is simple in structure, convenient to use, and can achieve good use effect.

The utility model particularly relates to a high-efficiency steam quality detection device which comprises a dryness and superheat degree detection device assembly, an air-cooled condensing device assembly and a non-condensable gas detection device assembly, the dryness and superheat degree detection device assembly comprises a steam guide four-way pipeline, a first pressure transmitter, a drain valve, a measurement four-way pipeline, a second pressure transmitter and a temperature sensor, and the air cooling condensation device assembly comprises an efficient condenser and an efficient cooling fan. The non-condensable gas detection device assembly comprises an air burette, a first electromagnetic valve, a first pressure differential sensor, a second pressure differential sensor, a condensate water burette and a second electromagnetic valve. The steam quality detection device has the advantages of high precision, high efficiency, high automation degree, capability of completely meeting the requirements of EN285 regulations on steam quality detection and the like.

The invention discloses a well chamber cover plate which comprises a well lid frame arranged on the side of an opening of a well chamber, a through hole communicated with the opening of the well chamber is formed in the well lid frame, and a supporting plate is arranged at the bottom end of the inner side wall of the through hole; the well lid structure is hinged to the well lid frame through a well lid base connector, the well lid structure is contained in the through hole and placed on the supporting plate, and an automatic lock is arranged on the well lid base connector; the gas detection device is arranged on the well lid structure; the trigger is arranged at the position of the well lid base connector; the controller is arranged in the well lid structure in a packaging mode, the output end of the gas detection device and the output end of the trigger are connected to the input end of the controller, and the controlled end of the automatic lock is connected to the output end of the controller. Through intelligent cooperative control of gas detection and mechanical interlocking, when the well lid is opened, the concentration of poisonous and harmful gas in the well chamber is automatically measured, and the purposes of detecting the working environment and protecting the safety of operators are achieved.

The application provides a rock drilling hydraulic control system and engineering equipment, and relates to the technical field of engineering equipment.The rock drilling hydraulic control system comprises an actuator, a power mechanism connected with the actuator through an oil pipeline and used for providing power for the actuator, a control valve group arranged on the oil pipeline and used for controlling the conduction of the oil pipeline, a gas detection device arranged in the actuator and used for detecting the content of protective gas in the actuator, and a control device connected with the control valve group and the gas detection device respectively and used for controlling the working state of the control valve group according to the detection result of the gas detection device.The rock drilling hydraulic control system provided by the application can avoid the situation that the actuator works without protective gas, and improves the service life of the equipment.

The present application relates to a gas detection device for an electrolysis cell test device and an electrolysis cell test device.The electrolysis cell test apparatus comprises the following: an electrolysis cell for receiving an electrolyte medium and for carrying out an electrolytic reaction, which has an outlet for discharging an electrolysis product; and a gas discharge line, one end of which is connected to the outlet of the electrolysis cell and which is provided with a gas pretreatment device; wherein the gas detection device comprises a gas sampling and analysis line, one end of which is connected to the outlet of the electrolysis cell, and wherein a sample gas treatment module and a gas analyzer are arranged successively along the flow direction of the electrolysis product, wherein the sample gas treatment module performs cooling and gas-liquid separation of the electrolysis product, while the gas analyzer analyzes the gas discharged from the sample gas treatment module.The gas detection device of the present application reduces the time between gas generation in the electrolysis cell and gas detection and improves the safety of the electrolysis cell test device.

The invention discloses a gas detection port protective cover and a gas detection device, and relates to the technical field of gas detection. The device mainly comprises a sleeve, a filter box, positioning mechanisms and a gas detector, the sleeve movably sleeves a gas inlet pipe orifice of the gas detector, the filter box is fixed at the other end of the sleeve and is used for filtering dust and moisture, the number of the positioning mechanisms is not less than two, and the positioning mechanisms are uniformly distributed on the sleeve. The positioning mechanism comprises a mounting box inserted in the sleeve, a mounting frame is movably arranged in the mounting box, a roller is rotatably mounted on the mounting frame, a first spring is connected between the mounting frame and the inner wall of the mounting box, and the positioning mechanism further comprises a fixing part arranged in the mounting box and used for fixing the roller. The gas detection device is convenient to mount and dismount, the dismounting of the protective cover needs certain operation, the anti-theft performance is improved, dust and moisture in the environment are effectively intercepted and absorbed through the design of the absorbent cotton and the filter plate, and the gas detection accuracy is improved.

The utility model discloses a gas detection device of a coal milling system for a blast furnace. The coal milling system comprises a coal mill and a powder collector, and a discharge port of the coal mill is communicated with an air inlet pipeline of the powder collector; comprising a first metallurgical process analysis system, a second metallurgical process analysis system, a first collection pump, a second collection pump, a first collection probe and a second collection probe, a feeding pipe is arranged on a feeding hole of the coal mill; the side wall of the feeding pipe is communicated with a sampling branch pipe; the first acquisition probe is accommodated in the sampling branch pipe. The device can improve the accuracy of the detection result of the content of CO and O2 in the environment in the coal mill and the powder collector.

The utility model discloses a laboratory gas detection device, which comprises a bottom plate, a hose and a detector body, the left side of the top of the bottom plate is provided with an anti-fracture mechanism, the left side of the bottom plate is fixedly connected with a storage box, and the top of the storage box is provided with a box cover; the anti-bending mechanism comprises an arc-shaped horn cover, a rubber ring and a fixing column, the bottom of the fixing column is fixedly connected with the top of the bottom plate, the top of the fixing column is fixedly connected with the bottom of the arc-shaped horn cover, and the right side of the rubber ring is fixedly connected with the left side of the arc-shaped horn cover; the left side of the hose penetrates through the arc-shaped horn cover and extends to the outer side of the arc-shaped horn cover, and the problems that in the prior art, the joint of a conveying hose and a butt joint sliding sleeve is not provided with an anti-bending structure, the conveying hose is prone to being bent in the using process, the accuracy of detection of gas in a laboratory is affected, and the working efficiency of the laboratory is affected are solved. And when the conveying hose does not need to be used, the conveying hose is inconvenient to store.

The application discloses a kind of quick detection device of gas content in transformer oil, it is related to the technical field of power transformer;Quick detection device of gas content in transformer oil includes first air pump, second air pump, gas separation structure, booster oil pump, circulation structure and gas detection device;First air pump forms negative pressure environment above the oil surface in heating inner bag, and carries out atomization spray to oil by circulation structure, can be fully released from dissolved gas in oil, greatly speeds up the gas release speed in oil liquid;After enrichment by pressurization, the gas concentration of the gas after release is improved, to avoid the detection deviation caused by too low gas concentration even missed detection;The application also designs laser detection structure based on photoacoustic effect and heat cleaning structure for removing residual water vapor;The device provided by the application shortens the overall time consumption of gas release and detection in transformer oil, and guarantees the accuracy of oil release gas detection.

The application relates to the technical field of insulating gas detection, and discloses an insulating gas detection device for electrical equipment, which solves the problem that it is difficult to quickly extract the gas in high-voltage electrical equipment for detection, and comprises high-voltage electrical equipment, the outer side of the high-voltage electrical equipment is provided with an optical measuring device, the top of the optical measuring device is connected with a laser, the bottom of the optical measuring device is connected with a detector, and the outer side of the high-voltage electrical equipment is provided with a data processor; the cooperation between the connecting pipe two, the side plate, the through groove and the abutting column facilitates the side plate to be sleeved outside the two positioning columns, the cooperation between the side column, the ball one and the inner plate facilitates the inner ring to slide along the two inner rods under the action of the elastic force of the two spring one, then the side plate can be limited, the connecting pipe two and the connecting pipe one can be quickly connected and fixed, and then the gas in the high-voltage electrical equipment can be quickly extracted into the optical measuring device for detection.

The utility model relates to a gas detection device which comprises a light-emitting part, a calibration gas chamber, a detection gas chamber, a photoelectric detection assembly and a wavelength calibration assembly capable of adjusting the wavelength of light emitted by the light-emitting part, and the photoelectric detection assembly comprises a first detection part capable of receiving the light emitted by the light-emitting part. The calibration gas chamber and the detection gas chamber are both located on a light path of light emitted by the light emitting part. The gas detection device provided by the utility model solves the problem that the existing gas detection equipment is relatively high in maintenance cost.

This invention discloses a gas detection device for the excavation chamber of a tunnel boring machine (TBM), relating to the field of gas detection technology for TBM excavation chambers. It includes a TBM body and an excavation chamber partition. A gas detection mechanism is fixedly connected to the partition. This gas detection device draws in gas through a suction system via a first flexible hose, a first connecting pipe, a transmission box, a transmission pipe, and an intake pipe. A filter screen in the intake frame first filters dust. The transmission mechanism drives the transmission pipe and the intake frame to rotate, achieving a wide-range suction and expanding the detection range. The filtered gas enters the gas detector for real-time detection, reducing detection delay and saving time for safe operation, thus improving production safety. Furthermore, the drive mechanism rotates the mounting box 90° periodically, alternating the intake air intake and further ensuring comprehensive detection. Simultaneously, the filter screen filters dust, reducing its impact on the gas detector and improving detection stability.

A kind of gas detection device based on environmental parameter compensation algorithm, including processor, sensor detection module, communication module and compensation correction module;Sensor detection module includes temperature and humidity sensor, gas detection sensor and wind speed sensor respectively connected with processor, the temperature, humidity value corresponding to each state point is saved in processor;When the device starts to carry out gas concentration detection, processor automatically obtains the initial value of gas concentration, temperature value and wind speed value corresponding to the same time point and calculates temperature compensation value and wind speed compensation value;After the initial value of gas concentration, temperature value and wind speed value obtained by processor, compensation correction operation is carried out to gas concentration data according to compensation algorithm;Finally, error correction is carried out again.The gas detection parameter value is compensated and corrected by temperature compensation and wind speed compensation in the application, and the gas concentration value can be compensated;So the data of gas detection can be closer to real value, and the accuracy of device under different environments is improved.

The utility model discloses a waste incineration gas detection device which comprises a cooling structure, a gas inlet pipe arranged on the left side of the cooling structure, a first valve arranged at the position, corresponding to a smoke exhaust pipeline, of the gas inlet pipe, a filtering structure communicated with the middle of the gas inlet pipe, a detection box arranged on the upper side of the cooling structure, and a communication pipe communicated with the detection box on the right side of the cooling structure. A dust cover is arranged at the position, corresponding to the communicating pipe, in the detection box, a cleaning opening is formed in the left side of the detection box, a first sealing cover is hinged to the cleaning opening, the top of the detection box is communicated with an air outlet pipe, the tail end of the air outlet pipe is communicated with the smoke exhaust pipeline, and a second valve is arranged at the position, corresponding to the smoke exhaust pipeline, of the air outlet pipe. An air outlet fan is arranged at the position, corresponding to the air outlet pipe, of the top of the detection box; the smoke can be filtered through the filtering structure, dust in the smoke entering the cooling structure is reduced, meanwhile, the dust cover is arranged in the detection box, the smoke is further filtered, and the detection effect of the detection box is guaranteed.