3402 results about "Smoke" patented technology

Electric heat for generating smoke from tobacco or the like in a hookah type smoking pipe. Electric heat is obtained from an electrically powered heating element which may be placed proximate the tobacco. The heating element may be contained within a housing which in turn may be placed above the smoking chamber of the hookah. The housing may have adjustably damped holes disposed to pass air over the heating element. Electrical circuitry serving the heating element may comprise a step down transformer and a voltage adjusting switch. The heating element may be integral with the hookah, may take the form of a separate component which is mountable over the smoking chamber of the hookah, or may comprise a free standing assembly which may be placed to stand adjacent to the hookah.

The invention relates to the technical field of fire safety monitoring, in particular to a firework identification system and method based on multi-modal fusion perception, and the core of the scheme is a visible light, multispectral and temperature three-modal framework: feature extraction optimization of each modal, improved YOLOv8s for visible light branches, dynamic background modeling and flame color screening, and multi-modal fusion perception. False positive is rejected by a multispectral branch depending on a waveband ratio and an index, an error compensation algorithm is introduced into a thermopile branch, and finally, a final smoke and fire area and the confidence coefficient thereof are determined by associating a three-mode area through collaborative decision. According to the scheme, the complex environment adaptability and the recognition reliability can be improved, the false alarm risk is reduced, the extremely-early smoke and fire detection capability is enhanced, good real-time performance and deployment flexibility are achieved, and the method is suitable for various types of fire safety monitoring scenes.

The invention provides an external smoke exhaust system of a laser cutting machine and a working method, relates to the field of laser cutting machines, and aims to solve the problems that smoke leakage of an existing laser cutting machine affects operation of a laser element. Air flow output by the air feeder can cover a smoke dust area where the laser head works, scattered smoke dust is blown to the inlet end of the smoke collecting hood in an oriented mode, disordered diffusion of the smoke dust is avoided, the smoke dust and high-temperature chippings are guided to the smoke collecting hood in the horizontal direction in an oriented mode through the horizontal air flow output by the air feeder instead of being guided upwards, and the smoke discharging path is in the horizontal direction. Smoke dust and high-temperature chippings are prevented from floating upwards to the laser element area of the cutting head, the possibility of contact between the high-temperature chippings and the laser element is cut off from the smoke exhaust path, and normal operation of the laser element is protected.

The invention discloses an HRR-based acoustic fire hazard type identification method, device and equipment and a medium, and relates to the technical field of fire hazard detection, and the method comprises the steps: obtaining an original acoustic signal through transmitting a high-frequency modulation ultrasonic wave and receiving a flame region reflection echo, obtaining channel impulse response data through channel estimation, and carrying out the channel impulse response data; flame features are extracted, a heat release rate curve is calculated and generated, finally fire type identification and fire behavior stage determination are completed based on the curve, dense smoke, shielding and illumination interference can be resisted, accurate quantification of the heat release rate is realized, fire type identification and fire behavior development stage determination can be finely carried out, and the accuracy of fire behavior determination is improved. And a stable and reliable technical support is provided for fire monitoring and emergency decision making.

The invention relates to the technical field of environmental protection, in particular to a spraying dust removal method, equipment and system. The spraying dust removal equipment comprises an outer cylinder and an adjusting mechanism, wherein a smoke inlet is formed in the lower part of the outer cylinder. The adjusting mechanism comprises an adjusting assembly and a plurality of turbulent balls. The adjusting assembly comprises a pull ring, a net bag and a driving unit. The smaller the initial dust air flow entering the smoke inlet is, the larger the upward moving stroke of the pull ring driven by the driving unit is, the upward moving of the pull ring drives the middle of the net bag to be further sunken downwards, the structure is convenient for weak air flow to preferentially pass through the periphery of the net bag with a small number of turbulent balls, effective turbulent washing is formed in the area, and the working efficiency is improved; and the normal operation and the dust removal effect of the equipment under low load are ensured. The invention provides a spraying dust removal method, equipment and a system, aiming at solving the problems that the dust removal efficiency is low and even the dust removal device cannot work when the flow of dust gas introduced into the existing dust removal device does not reach a preset dust gas flow range value.

The invention discloses an intelligent smoke furnace catalysis operation condition suitability grading method. The method comprises the steps that basic parameters of an operation point are obtained; calling a Passive-Toner algorithm to calculate the atmospheric stability grade of the operation point; the continuous cigarette lighting source intensity is calculated according to the used flame bar combustion data; calculating the vertical airflow distribution of the operation point by adopting a Matviyerv vertical velocity theoretical model based on the altitude and vertical airflow observation data of the operation point; based on the continuous cigarette lighting source intensity, calculating the ice nucleus number concentration distribution in the cloud in combination with the vertical airflow distribution and the horizontal wind field; calculating an operation suitability index by adopting a comprehensive index algorithm in combination with the lifting condensation height, the cloud amount and the cloud classification data; and performing grading processing on the job suitability index according to a set threshold value combination so as to output a plurality of job suitability grading results. According to the method, comprehensive analysis is carried out by considering the meteorological condition and the catalytic condition of the operation point, so that the accuracy and the credibility of an operation condition suitability judgment result are improved to a certain extent.

The utility model provides a smoke gathering structure and a range hood, and relates to the technical field of kitchen appliances. The smoke gathering structure mainly comprises a smoke collecting hood, a smoke gathering plate and a driving assembly. A plurality of clamping structures are arranged in the exhaust fume collecting hood; the smoke gathering plate is arranged on one side of the smoke collecting hood and can rotate relative to the smoke collecting hood; the driving assembly comprises a driving motor and a transmission part which are connected. The transmission part is arranged in the exhaust fume collecting hood and is connected with the exhaust fume gathering plate; the driving motor drives the transmission part to move so as to drive the smoke gathering plate to rotate. According to the embodiment provided by the invention, in the stage that the driving motor drives the transmission part to move to drive the smoke gathering plate to rotate, after the transmission part moves to abut against any clamping structure, the driving motor stops and keeps the self-locking state, and the self-locking driving motor, the abutting clamping structure and the transmission part form enough support for the smoke gathering plate; when a user presses the function key, the smoke gathering plate is kept stable, and it is ensured that the user has good operation (touch) experience and visual experience during operation.

The invention relates to the technical field of automobile manufacturing, in particular to a flame-retardant coating detection device and a flame-retardant coating detection method. The flame-retardant coating detection device comprises a baffle plate, a supporting plate, a cover plate and a supporting plate which are enclosed to form a closed test cavity. The baffle is provided with a first mounting hole for fixing a fire source, the supporting plate is provided with a corresponding second mounting hole for fixing a temperature detection piece, the cover plate is provided with an insertion hole for mounting a sample, and the supporting plate is provided with a smoke suction assembly. The device is simple in structure and convenient to operate, a fire source and a temperature measuring point can be effectively fixed, the testing efficiency and accuracy are improved, testing is conducted in a closed environment, the smoke suction function is integrated, safe and environment-friendly harmful smoke is guaranteed, the safety and health of operators are comprehensively guaranteed, and environmental pollution is avoided.

The invention provides a tunnel fire monitoring and ventilation and smoke exhaust linkage control system. The tunnel fire monitoring and ventilation and smoke exhaust linkage control system comprises a tunnel environment and fire monitoring module, a data fusion processing module, a tunnel ventilation and smoke exhaust linkage control module and a remote monitoring and control management system module which are connected through a communication network. The data fusion processing module is configured with a D-S evidence theory algorithm and is used for receiving multi-source environment data, calculating basic probability distribution of data of each sensor, quantitatively evaluating a fire occurrence probability through a combination rule and generating a fire state judgment result; the tunnel ventilation and smoke exhaust linkage control module is used for receiving the fire state judgment result and determining the target wind speed according to the fire scale; a fuzzy PID control unit and a hysteresis control unit are arranged in the tunnel ventilation and smoke exhaust linkage control module. According to the method, the problem of high false alarm rate of traditional monitoring is solved, the engineering problem that discrete ventilation equipment is difficult to continuously and accurately control is solved, and the disaster prevention and reduction capability of the tunnel is remarkably improved.

The invention belongs to the technical field of computer vision, embedded edge calculation and intelligent video monitoring, and discloses a yolk-based night smoke and fire identification optimization method, which can effectively detect flames at night or in a scene with disordered light. A multi-source data fusion and lightweight scene segmentation technology is adopted, an on-site perception model is built, and the model is combined with a small sample learning mechanism, so that night common interference factors such as vehicle lamps and street lamps can be identified; then, a federal learning algorithm and a time sequence attention module are used for modeling the dynamic characteristics of the smoke and fire, and an obtained characteristic model has high generalization ability; then, the system accurately screens out real smoke and fire candidate targets through self-adaptive threshold matching and pixel-level interference elimination operation; and finally, based on a multi-factor decision model and a dynamic edge transmission technology, rapid alarm of smoke and fire identification is realized. The whole system can also automatically optimize the whole process parameters of the method through rule mining and reinforcement learning.

The invention relates to the technical field of intelligent control, in particular to a coke pushing process environment dust removal system air volume intelligent energy-saving regulation and control system and method, and the system comprises a process signal module, an image sensing module, a dynamic infrared module, a real-time flue gas analysis module and a dust removal air volume control module. In the invention, the air volume regulation of the dust removal equipment is not a fixed and extensive mode any more, but is converted into a four-gear variable-speed intelligent response matched with the actual smoke dust load, the dust removal equipment runs at a low-energy-consumption gear when the smoke dust generates initial stage or light pollution, and the air volume is gradually increased along with the rising of the smoke dust load, so that the dust removal efficiency is improved. When large-scale smoke dust leakage caused by equipment faults or extreme working conditions is monitored, the highest-gear full-force trapping is immediately started, the treatment effect is ensured, and the regulation and control according to needs not only improves the smoke dust trapping efficiency and effectively restrains unorganized emission, but also reduces the operation energy consumption of a dust removal system, and realizes double improvement of environmental protection benefits and economic benefits.

The invention discloses an aerosol-generating article comprising an aerosol-generating substrate segment, the aerosol-generating substrate segment comprising a plurality of aerosol-generating capsules. According to the aerosol generating product provided by the invention, the aerosol generating capsule with a core-shell structure is used as a fuming material, so that the heating release temperature can be further reduced, and the harm of smoke is reduced.

The invention relates to the technical field of chemical plant smoke filtering, in particular to a chemical plant discharge filtering device with a monitoring function, which comprises a barrel, a gas inlet pipe, a gas outlet pipe and the like, the barrel is communicated with the gas inlet pipe, and the top of the barrel is communicated with the gas outlet pipe. Indexes of pollutants such as sulfur dioxide, nitric oxide, carbon monoxide and carbon dioxide in flue gas can be detected through the flue gas sensor, when the flue gas sensor detects that the pollutants in the flue gas exceed the standard, the controller can control an electric guide rail to work, the electric guide rail drives a first push plate to move forwards, and a first sealing plate can also move forwards; the first sealing plate seals the exhaust pipe, real-time response can be achieved after the filter element is aged and breaks down, the filter element is replaced without shutdown under the condition that it is ensured that smoke does not leak, smoke which is not completely purified is prevented from being exhausted out, and therefore pollution to the environment can be avoided.

The invention discloses an extractor hood and a control method and a control device thereof.The extractor hood comprises at least two independently-lifting smoke gathering cavities, and the control method comprises the steps that a neural network model is adopted, and based on first video information, first image information and oil smoke concentration information of a target cooking area, the first video information and the first image information are obtained; determining cookware size information, cookware type information, cooking temperature information, concentration standard exceeding information and cooking fume movement information; the lampblack movement information comprises lampblack speed information and lampblack direction information; according to the pot type information, the cooking temperature information, the concentration standard exceeding information and the oil smoke speed information, the suction demand level of the target cooking area is determined; according to the suction demand level and the cookware size information, the target height of a smoke gathering cavity corresponding to the target cooking area is determined, and the smoke gathering cavity is controlled to descend to the target height from the initial position. According to the technical scheme, the oil smoke suction efficiency of the range hood in a complex cooking scene can be improved, and the use experience of a user is improved.

The invention belongs to the technical field of kitchen appliances, and discloses a hidden range hood which comprises a case, a smoke gathering shell, a driving mechanism and a smoke gathering plate. The smoke gathering shell is slidably connected to the machine box and provided with a smoke sucking opening. The driving mechanism is connected with the smoke gathering shell; the smoke gathering plate is arranged at the smoke sucking opening, is in sliding connection with the case and the smoke gathering shell through a connecting assembly and is locked with the case at a first position; wherein the smoke gathering shell has a hidden state and an open state, in the hidden state, the smoke gathering shell and the smoke gathering plate are both located in the machine box, in the open state, the driving mechanism drives the smoke gathering shell and the smoke gathering plate to slide to the first position, and the driving mechanism drives the smoke gathering shell to slide relative to the smoke gathering plate so as to open and adjust the smoke suction opening. The double-lifting function of the smoke gathering shell and the smoke gathering plate can be achieved through one driving mechanism, so that the complexity of a mechanical structure and a control circuit is effectively reduced, the design and manufacturing difficulty of a product is reduced, and meanwhile the overall production cost is reduced.

The invention relates to the technical field of range hoods, in particular to a range hood, and aims to solve the problems that a smoke suction port of an existing range hood is small in lifting adjustment range, the appearance cannot be kept concise in a non-working state, and the smoke gathering effect cannot be effectively improved in a working state. The range hood of the present invention comprises: a main case; a top suction opening is formed in the smoke collecting cavity; a side suction port is formed in the side suction cavity; the smoke gathering plate is used for opening and closing the top suction opening; the lifting driving mechanism is used for driving the side suction cavity to be switched between the state of being stored in the smoke collecting cavity and the state of stretching out of the smoke collecting cavity in the process of synchronously lifting the side suction cavity along with the smoke collecting cavity; in the storage state, the side suction port is closed, and in the extending state, the side suction port is opened; and the smoke gathering plate driving mechanism is used for driving the smoke gathering plate to open and close. According to the range hood disclosed by the invention, the negative pressure coverage range is expanded to improve the smoke gathering effect, and the simplicity of the appearance of the whole range hood and the minimization of the occupied space are realized through precise storage of the parts.

The invention relates to the technical field of air pollution detection, in particular to a flue gas detector and a calibration detection method thereof, and the flue gas detector comprises a concentration fluctuation analysis module, an abnormal data screening module, an error interval collection module, a parameter trend analysis module and a period stability judgment module. According to the method, abnormal data and equipment drift influence are dynamically screened, an error change interval is actively collected, and through linkage comparison of multi-source parameter trends and separation of working condition disturbance, instrument abnormality and periodic offset signals, automatic screening of concentration data and operation parameters under multiple links is achieved, feature recognition and abnormal partition are associated, and the accuracy of the system is improved. The sampling effectiveness, the data stability and the instrument parameter change trend under the continuous detection working condition are managed in a layered mode, a traceable dynamic calibration chain is formed, the smoke detection consistency and the data exception handling capacity in the complex emission environment are remarkably improved, and an intelligent judgment mechanism of data grading rejection and trend aggregation is perfected.

A micro-vibration wave generating device includes: a power indicator circuit, a first transformer micro-vibration wave generating circuit, and a receptor. An input end of the power indicator circuit is connected to the power source; an input end of the first transformer micro-vibration wave generating circuit is connected with an output end of the power indicator circuit; the receptor is connected with an output end of the first transformer micro-vibration wave generating circuit. Micro-vibration waves generated by the transformer micro-vibration wave generating circuit can resonate with the water molecules in the food, and thereby the water molecules form soft and non-spiky crystals of water molecules when they are frozen, which greatly reduces the damage to the food cells. Accordingly, the quality of the food is intact without mixing odors. The present invention can also be used in cooking deep fried food with almost no oil smoke produced.

The invention provides a dust removal device and a dust removal system, and relates to the technical field of tobacco equipment, and the dust removal device comprises a shell, an air inlet pipeline, an air outlet pipeline and a material blocking assembly. A blanking hopper is arranged in the shell, the output end of the air inlet pipeline is located above the blanking hopper, the air outlet pipeline is communicated with the end, away from the air inlet pipeline, of the shell, the input end of the air outlet pipeline is located above the output end of the air inlet pipeline, and the first material blocking part is arranged between the output end of the air inlet pipeline and the input end of the air outlet pipeline in a blocking mode. The first material blocking part and the second material blocking part are arranged at an angle, a gap is formed between the first material blocking part and the second material blocking part, and the gap is located on the side, away from the output end of the air inlet pipeline, of the first material blocking part. According to the dust removal device, the situation that dust or smoke dust entering the shell is directly sucked into the air outlet pipeline is avoided, an airflow path enters the air inlet pipeline through the gap position, the purpose of guiding airflow containing dust is achieved, and then the safety of the dust removal device is improved.

The utility model belongs to the field of additive manufacturing, and relates to aeration type smoke dust treatment equipment which comprises a reaction cavity loaded with an inert and aeration equipment extending into the reaction cavity, the interior of the reaction cavity is in a low-oxygen or oxygen-free environment; the reaction cavity is provided with a smoke gas inlet, a smoke gas outlet, a material supplementing opening and a slag discharging opening which are communicated with the reaction cavity; metal smoke dust to be treated enters the reaction cavity through the smoke dust gas inlet and / or the aeration equipment and then directly impacts or is introduced into the inerts to be physically combined with the inerts, and the purified metal smoke dust is discharged through the gas outlet. The utility model provides the aeration type smoke dust treatment equipment which is high in safety degree and easy to operate.

The utility model relates to an electric control cabinet intelligent safety alarm device, which comprises an electric control cabinet main body, an ultrasonic ranging module, an alarm module and a communication module, and is characterized in that the ultrasonic ranging module measures the time difference of transmitting and receiving ultrasonic waves to determine the actual distance between an obstacle and the electric control cabinet main body, so that non-contact ranging is realized; the timeliness of alarm triggering is ensured, and accurate measurement can be carried out even in a severe environment full of dust, smog or corrosive substances and the like; the multi-mode alarm module and the ultrasonic ranging module are combined for use, multi-mode alarm is carried out when the ultrasonic ranging module triggers the alarm function, a multi-level verification and confirmation mechanism is realized, the possibility of false alarm is reduced, diversified alarm signals are provided, and the alarm can be carried out even in a noisy or poor-sight environment. Normal receiving of alarm information can also be ensured; by means of the communication module, the intelligent safety alarm device of the electric control cabinet has remote monitoring and management functions, and the quick response capability is remarkably enhanced.

The invention provides a range hood operation control method and device, a lifting type range hood and electronic equipment, and the method comprises the steps: obtaining a to-be-cooked food material and a user portrait in response to a cooking starting operation; generating a personalized menu based on the to-be-cooked food materials and the user portrait; and generating a control curve of the range hood based on the personalized menu, wherein the control curve comprises a range hood lifting curve and / or a range hood air volume curve. According to the method, the fine-grained user portrait is constructed by collecting the biological characteristics, the dietary habits and the cooking behavior characteristics of the user, and the control curve of the range hood adaptive to the individual preference is generated accordingly, so that the individual suitability and accuracy of the control curve of the range hood are remarkably improved.

The invention discloses an air purification device and a control method, and relates to the field of air purification, and the air purification device comprises a shell, a polarity switching unit, a discharge electrode group and a cleaning electrode group; the discharge electrode group and the cleaning electrode group are both arranged in the shell; the discharge generation end of the discharge electrode group and the discharge generation end of the cleaning electrode group are both close to the airflow direction; the air flow circulates in a space between the discharge electrode group and the cleaning electrode group; the polarity switching unit is respectively connected with the discharge electrode group and the cleaning electrode group; the polarity switching unit is used for controlling the discharge electrode group to apply a first polarity voltage so as to generate a plasma electric field; and the polarity switching unit is also used for controlling the cleaning electrode group to apply reverse polarity voltage so as to generate an electric field for decomposing and stripping surface deposition of the discharge electrode group. The device realizes automatic cleaning and is suitable for heavy oil smoke scenes.

The application discloses an oil fume extractor, which comprises an air inlet assembly and an upper box body, the bottom surface of the upper box body is provided with an air inlet, the air inlet assembly comprises a lower box body and a smoke baffle, the lower box body comprises a back plate connected with the rear side of the upper box body; the air inlet assembly further comprises a first baffle, the first baffle is fixedly arranged at the upper end of the smoke baffle, and the smoke baffle and the first baffle have at least a closed state and an open state; in the closed state, the smoke baffle is close to the back plate, and the first baffle closes the air inlet; in the open state, the first baffle opens the air inlet, and a smoke collecting cavity is formed between the smoke baffle and the back plate. Compared with the prior art, the oil fume extractor has the advantages that: on the premise of ensuring the structural strength, the air inlet channel in the form of a fixed inner cavity is not needed, the oil fume extractor can be made extremely light and thin, the smoke baffle and the first baffle are kept in a fixed state, there is no mutual movement between the sub-components, the related parameter requirements (such as assembly gap) are easy to control, and the overall structure is stable and reliable.

The utility model discloses an electric multifunctional barbecue firewood stove, and relates to a multifunctional stove which has the functions of automatic turnover of barbecue, heating, fire observation, boiling, frying and frying in the field of outdoor camping, picnic and travel. A downward turning type oven door with a glass window is arranged on an oven body, an electric turning module is installed on the oven door, in the barbecuing process, a food material string can be laterally erected beside charcoal fire to be automatically rotated and barbecued through the module, manual food turning and charcoal dense smoke fire are avoided, and food material taking and seasoning spraying are convenient and safe after the oven door is opened in a downward turning mode. The combined stove cover is composed of a main stove cover and expansion covers, a boiling square pot, a roasting net and a frying pan can be placed after the main stove cover is opened, and the expansion covers, a chimney assembly, a teakettle and the like can be fixed at the positions of the two expansion covers on the main stove cover. And parts such as a folding storage plate, a firewood tray, an ash receiving tray (oven), a charcoal cage and a large barbecue bracket are also arranged. Various cooking modes of frying, boiling, boiling and baking are achieved in combination with the stove body, meanwhile, the number of processed food materials is large, and the stove has the heating and fire observing functions of a firewood stove.

The invention relates to the technical field of gas purification, and discloses an organic waste gas filtering and purifying device which comprises a tank body, a smoke inlet is formed in the bottom of the tank body, a water cabin is arranged on the outer wall of the tank body, a water pumping pipe is fixedly connected to the top of the water cabin, and a water pump is arranged on the circumferential surface of the water pumping pipe. A water adjusting mechanism is arranged in the tank body, the main shaft is rotatably connected to the interior of the tank body, a smoke outlet is formed in the outer wall of the tank body, the feeding pipe is fixedly connected to the inner wall of the feeding bin, and the small filter plate is fixedly connected to the inner wall of the bottom of the feeding bin. The rotating cabin rotates to drive the water spraying pipe to rotate, and the water spraying pipe rotates to increase the spraying area of sprayed water, so that a better purification effect is achieved.

The utility model relates to the technical field of range hoods, in particular to a cleaning unit which comprises one or more cleaning subunits, each cleaning subunit comprises a retaining strip made of a first material and a front scraping part and / or a rear scraping part which are fixed relative to the retaining strip and made of a second material, the front scraping part is used for being coupled with the air inlet side surface of each layer of filter plate, the rear scraping part is used for being coupled with the rear side surface of each layer of filter plate, the hardness of the first material is larger than that of the second material, and the hardness of the second material is smaller than that of the filter plate. By adopting the scheme, the rigidity effect of the cleaning subunits can be improved, the fitting degree of one or more cleaning subunits and the filter plate is ensured, and the cleaning effect is ensured. The utility model further provides a filter plate unit cleaning assembly of the cleaning unit and a range hood.

The invention discloses a dust collection system and method for a large-breadth laser cutting machine. The dust collection system comprises a lathe bed, a cross beam, a multi-section cutting area, a dust collection pipe, a follow-up fan, a fixed fan, a position feedback system, a smoke sensing system and a control system. The dust suction pipe is arranged on one side of the lathe bed and provided with dust suction openings corresponding to the cutting areas. The follow-up fan is connected to the bottom of the cross beam and moves along with the cross beam to blow cutting smoke to the dust suction port; the fixed fan is arranged on the other side of the bed body and blows residual smoke dust in the located area to the dust suction port. The position feedback system determines the position of the cutting assembly in real time, the smoke sensing system detects the smoke concentration of each area, and the control system starts the corresponding dust collection openings and the fans according to feedback signals to achieve accurate dust collection. When the follow-up fan and the fixed fan are located in the same area, the fixed fan stops automatically, and airflow hedging is avoided. The device has the advantages of optimized structure, intelligent control, energy conservation, high efficiency, thorough dust collection and the like, and is suitable for smoke dust treatment of the large-breadth laser cutting machine.

1. Name of the designed product: electronic smoker. 2. Use of the designed product: for generating smoke to increase the flavor of drinks or food. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view.

The invention provides a method and system for evaluating the spontaneous combustion risk of a fire in a confined space, and relates to the technical field of fire evaluation, and the method comprises the steps: constructing a ceiling impact fire model based on the confined space, the optimized discretization parameters of the ceiling impact fire model are determined by simulating and verifying free fire plume based on an open space in advance; based on the ceiling impact fire model, performing numerical simulation under various ventilation limitation degrees and various heat release rates to obtain a simulation result; based on the simulation result, extracting concentration distribution data and flue gas temperature distribution data of unburned fuel at the ceiling position; and comparing the concentration distribution data of the unburned fuel and the flue gas temperature distribution data with corresponding combustion thresholds, and evaluating the spontaneous combustion risk of the limited space according to a comparison result. According to the invention, the assessment of the fire spontaneous combustion risk can be accurately quantified, and the serious dependence on artificial experience is avoided.