70results about How to "Reduce the chance of escape" patented technology

The invention discloses an efficient reburning denitrification device which comprises a decomposing furnace. The bottom of the decomposing furnace is provided with a secondary air inlet and is connected with a rotary cement kiln. The decomposing furnace comprises a main low-nitrogen burner and a reburning burner on the lower portion from bottom to top, and a raw material inlet is arranged at the position of the main low-nitrogen burner. Coal powder in a coal powder bunker enters the decomposing furnace from the main low-nitrogen burner and the reburning burner. A tertiary air inlet is arranged below the raw material inlet and connected with a cooler of the rotary cement kiln. The decomposing furnace comprises an overfire air inlet and an SNCR (selective non-catalytic reduction) spray gun on the upper portion from bottom to top. The overfire air inlet is connected with the tertiary air inlet and the cooler of the rotary cement kiln. The SNCR spray gun is connected with a centrifugal pump and an ammonia water storage tank device. A smoke outlet is arranged at the upper section of the decomposing furnace and connected with a cyclone preheater, an electric dust collector and a chimney. The invention further provides a technical reburning denitrification method by the efficient reburning denitrification device. By the efficient reburning denitrification device and the technical reburning denitrification method, NOx removal efficiency can be improved, sprayed ammonia water is reduced, and denitrification cost of cement enterprises is lowered.

The invention provides a patrol and special police system for the mobile police service, including a mobile terminal, a mobile communication network, a mobile access zone, a safe isolation zone and a police information network. The mobile access zone comprises a mobile access service platform and a mobile application service platform, and achieves mobile safe access and mobile application services. The safe isolation zone adopts a safe isolation product to isolate the police information network from the external. The police information network provides information and service support for the mobile application of the terminal. The system achieves safety, mobility and efficiency scheduling through response alarm, patrol task process analysis and multiple safety measures.

An extractor hood comprises a fan outer cover and a smoke collection cover. The extractor hood is characterized in that a movable smoke blocking plate is mounted on each of the left side and the right side of the smoke collection cover, is arc-shaped and is provided with a concave face downward, and the movable smoke blocking plate is driven by a driving mechanism to upwards contract into the smoke collection cover or downwards extend out of the same along an arc-shaped track. The extractor hood has the advantages that the arc-shaped movable smoke blocking plates are mounted on the left side and the right side of the inside of the smoke collection cover, contract into the smoke collection cover when not working and extend out of the smoke collection cover when working, so that acting distance of left and right cavity negative pressure areas of the smoke collection cover is expanded, and opportunity that rising oil smoke escapes from two sides of the smoke collection cover is reduced. In addition, the smoke collection cover is generally small in own height, so that after the arc-shaped smoke blocking plates are adopted, the arc-shaped smoke blocking plates can rotate to contract or extend, height of an extending portion can reach or exceed original height of the smoke collection cover, extending distance is relatively long, and better smoke blocking effect is acquired.

The invention relates to a gene of an MLL leukemia targeted dual-specific chimeric antigen receptor and an application of the MLL leukemia targeted dual-specific chimeric antigen receptor. The dual-specific chimeric antigen receptor disclosed by the invention can be used for specifically recognizing two kinds of tumor associated antigens, i.e., CD19 and CD133 on surfaces of MLL leukemia cells. The dual-specific chimeric antigen receptor is expressed through recombining a TanCAR molecule to a virus vector and carrying out T lymphocyte series transfection, dual positive tumor cells, i.e., the CD19 and the CD133 can be specifically recognized and killed, the kill effect on non-tumor cells is relieved, and the probability of escape of tumor antigens is lowered. The MLL leukemia cells can be specifically killed by TanCAR(1linker)-Jurkat in case of a relatively low effector-target ratio, and toxic or side effects less occur in subsequent clinical use, for example cytokine storm and neurotoxicity. The dual-specific chimeric antigen receptor disclosed by the invention can be applied to the treatment of MLL leukemia and is used for clearing in-vivo tumors from patients and prolonging lifetime of the patients.

The invention belongs to the technical field of aquaculture and discloses a culture method for double alternate culturing and intercropping lobster and river crab ponds with microptenus salmoides. The method comprises pond preparation, temporary culture of juvenile crabs in a special pond, stocking and culture of lobster seedlings, stocking of microptenus salmoides fries, catching and marketing of lobsters, stocking and culture of juvenile river crabs after temporary culture, utilization of a temporary culture pond, daily management, catching and marketing of river crabs and microptenus salmoides and other steps. The growth characteristics and life habits of the river crabs, the lobsters and the microptenus salmoides are comprehensively considered, the space of the pond is used to culture the lobsters firstly in the early stage of growth of the river crabs, the river crabs are mainly cultured after the lobsters are caught before the end of July, the culture pond is interplanted with microptenus salmoides for control of small trash fish in the pond, and the utilization rate and the economic benefit of a crab pond are increased.

The invention relates to a gas-liquid entrainment mixing apparatus and method. The invention relates to an apparatus and a method for physically mixing smoke and purified liquid, which solves the problems in a gas-liquid contact way that the airflow impacts the liquid surface that the gas and liquid are insufficiently mixed due to the intermittent and paroxysmal stimulation of the purified liquid trapping body. When the airflow impacts the liquid surface, the stability of the liquid surface of the purified liquid is adjusted by virtue of a liquid phase flow stabilizing apparatus and a two-phase flow guide apparatus, the high-frequency stimulation of the purified liquid trapping body is adjusted by virtue of the gaseous distributing and pressurizing apparatus and the two-phase flow guide apparatus, a gas-liquid mixing space is controlled by virtue of an entrainment cavity and the two-phase flow guide apparatus, the gas-liquid entrainment and mixing effect is improved, finally the gas and liquid in a purification cavity can be sufficiently mixed, harmful components in the harmful gas can contact with the purified liquid sufficiently, the leakage probability of the harmful components can be reduced, and the purification efficiency can be improved.

The invention discloses a safety monitoring system used for the mining industry. The safety monitoring system comprises a methane concentration sensor, a dust concentration sensor, an oxygen concentration sensor, a carbon monoxide concentration sensor, a hydrogen sulfide concentration sensor, an image sensor, a central processing unit, a wireless communication module and an alarming system, wherein the methane concentration sensor, the dust concentration sensor, the oxygen concentration sensor, the carbon monoxide concentration sensor, the hydrogen sulfide concentration sensor and the image sensor are all electrically connected with a data acquisition module; the central processing unit is electrically connected with a remote monitoring terminal and a wireless service terminal respectively through the wireless communication module; the central processing device is electrically connected with the alarming system through a safety crisis grading module. Crisis signals of accidents are sent to mobile phones of workers in time according to different alarm grades, so that the workers can learn about crisis information in detail and make optimal choices, and the flexibility of the monitoring system is improved.

The invention relates to a cement solidified waste. The cement solidified waste comprises 13-27% of converter slag, 8-12% of desulphurization ash, 25-32% of chromium slag, 5-15% of fly ash, 4-8% of cement, 4.5-6.5% of emulsified bitumen, 1-2% of fibers, and the balance of water. The converter slag and the chromium slag are mixed and are ground to 40-100 meshes, all raw materials are mixed and stirred until uniformity, the obtained mixture is put in a die, and is solified to form a mold, and the die is removed 24-36h later. The Cr<6+> leaching concentration is greatly reduced, and it is guaranteed that the concentration of Cr<6+> in a leaching concentration is lower than the concentration standard of national standard GB5085.3 danger waste upper limit.

The invention discloses a balloon suction catheter device for intracranial thrombus removal and relates to the field of medical instruments. The device comprises an outer sleeve, a suction catheter, aballoon, a first developing ring, a second developing ring, a stress diffusion tube and a Y-shaped handle, the outer sleeve and the suction catheter are coaxially arranged, the proximal part of the suction catheter is arranged in the inner cavity of the outer sleeve, and the suction catheter arranged in the inner cavity of the outer sleeve and the outer sleeve form a double-cavity structure; andthe balloon is fixedly arranged at the distal end of the outer sleeve, the first developing ring is fixedly arranged at the distal end of the outer sleeve and is close to the balloon, the second developing ring is fixedly arranged at the distal end of the suction catheter, and the proximal end of the outer sleeve is connected to the distal end of the stress diffusion tube. The device of the invention not only can reduce the escape probability of embolus and reduce the expense and the operation time, but also has the characteristics of simple structure and various functions.

The invention discloses bee box and auxiliary equipment. Ventilation ports are formed in a box body or a box cover and is used for ventilation instead of light transmission, a frame can clamp combs, damage to a sealed brood is reduced, the quantity of bees can be adjusted through a queen bee separation entrance, loss is reduced in cooperation with a queen bee collecting box capable of collecting queen bees and drones, a box is round, the entrance is arc-shaped on the back, a feeding device is arranged in the box, water can be added to the feeding device without opening the box, the width of awater feeding channel is set to be within 37 mm, the water feeding channel only occupies the width of one comb, a main body of the feeding device is arranged to be round or square and used in a grid box or a drum type bee box, a water adder can quantitatively add water to the feeding device, labor is reduced, a cage for introduction of the queen bee is 6-15 mm thick and can be put in a bee way without producing burr combs, the queen bee can eat honey on the combs during introduction of the queen bee, worker bees can go in and out during storage of the queen bee, a wasp collection device induces wasps into a collecting box, the wasps are trapped in the box, double covers are adopted for thermal insulation, arc forging parts are arranged on the box covers when the bee box is round, spring hoops are arranged in the middle of the bee box, a bottom plate and the box body are connected through hinges, and an additional observing port is not required during bee checking.

The invention discloses crawfish fishing tackle, and belongs to the technical field of fishing tackles. The crawfish fishing tackle comprises a fishing rod and a crawfish cage; the crawfish cage comprises four vertical rods, a first screen and a second screen; the four vertical rods are arranged at intervals, two first transverse rods which are crossed are arranged on the tops of the four vertical rods, and the fishing rod is connected to the crossed position of the first transverse rods through a first rope; the first screen and the second screen are installed among the four vertical rods; the first screen is fixedly connected with the four vertical rods and located below the second screen; the second screen is arranged between the first screen and the two first transverse rods and movably connected with the four vertical rods; a plastic ball is connected to the second screen, and the gravity of the crawfish cage is smaller than the buoyancy of the plastic ball in water. When a fisherman reels in, under the pulling force of the first rope, the first transverse rods quickly move upward, and correspondingly, the first screen moves upward with the vertical rods and forms a sealed structure with the second screen, so that all escape routes of crawfishes are intercepted, and the problem that crawfishes are likely to escape when reeling in is conducted is solved.

The invention discloses a system for preventing and controlling diseases and pests by a black light lamp principle. The system comprises a bottom plate and is characterized in that the bottom plate isfixedly connected with a set of cylindrical rods evenly distributed in the circumferential direction, each cylindrical rod is fixedly connected with a connecting rod, each connecting rod is fixedly connected with a hollow barrel, each hollow barrel is fixedly connected with a round plate I, each round plate I is provided with a group of round holes which are uniformly distributed in the circumferential direction, each round plate I is fixedly connected with round pipes corresponding to the round holes, each round pipe is provided with a box placing opening and an inlet, each round plate I isfixedly connected with a square rod, and each square rod is fixedly connected with a treatment mechanism. The invention relates to the field of disease and pest control equipment, in particular to thesystem for preventing and controlling the diseases and pests by the black light lamp principle. The diseases and pests can be conveniently prevented and controlled.

The invention discloses a chicken lobster fishing cage, and belongs to the technical field of fishing tools. The chicken lobster fishing cage includes a fishing rod and a cage; the cage includes a first net cover and a second net cover which are opposite each other vertically; a vertical rod is arranged between a first horizontal plate arranged on a bottom end of the first net cover and a second horizontal plate arranged on a top end of the second net cover; an upper end of the vertical rod passes through a first through hole formed in the second horizontal plate, and is movably connected to a cylinder through a piston; a bottom end of the cylinder is fixed on the second horizontal plate, and a top end of the cylinder is connected to an air pipe; a seal plug is arranged on the other end of the air pipe; the first horizontal plate is connected to the second horizontal plate through springs; the cage is opened before entering water, the seal plug is used to seal the air pipe, and the vertical rod can maintain an opened state of the cage; when chicken lobster eats food, a fishing man takes the seal plug, the first net cover and the second net cover form a sealed structure under the action of the springs, all the escape paths of the chicken lobster are blocked, and the problem that the chicken lobster escapes during reeling can be overcome.

The invention discloses an inner container air faucet for a sports ball. The inner container air faucet comprises a shell and an inner core arranged in the inner cavity of the shell, wherein the shell comprises a main body of which the length is approximately the same as that of the inner core, and an elongated protection ring connected to the lower portion of the main body; the lowermost end of the inner core is positioned above the lowermost end of the elongated protection ring; the length of the elongated protection ring is 12-18 millimeters. According to the air faucet, an air needle is prevented from being contacted with an inner container wall under the coating action of the elongated protection ring of the air faucet during inflation, thereby preventing the inner container from being punctured during inflation or deflation; moreover, the overall length of the air faucet is greater than that of the conventional air faucet, thereby lowering the probability of overflow of air inside the inner container from the air faucet, and enhancing the airtightness of the inner container. An inner container is further disclosed. The inner container is provided with the air faucet.

The invention relates to a lamp tube device with an electric connecting sleeve of a winding body and a light source module. The lamp tube device comprises a lamp tube body and the electric connecting sleeve of the winding body; wherein the lamp tube body has an end part and a guide wire extending outward from the end part. The position of the electric connecting sleeve of the winding body corresponds to the end part of the lamp tube body; the electric connecting sleeve of the winding body is electrically connected with the guide wire so as to transmit electric power into the lamp tube body from outside. The electric connecting sleeve of the winding body winds along the direction of an axle center of the lamp tube body and can carry out elastic or non-elastic stretching or compression along the direction of the axle center. Besides the lamp tube device, the light source module also comprises a lamp tube connecting seat which comprises a power end which is electrically connected with the electric connecting sleeve of the winding body to supply power so as to lead the lamp tube body to emit light. The lamp tube device and the light source module are easy to assemble, have better radiating effect, can reduce the damage of the lamp tube due to external force and can reduce the chance of tripping of the lamp tube from the connecting seat.

The invention relates to high-efficiency denitration ionic liquid, which belongs to the technical field of smoke treatment. The high-efficiency denitration ionic liquid comprises the following components: 15 to 30 parts of urea-based organic peptide, 60 to 80 parts of deionized water, 5 to 10 parts of catalyst, 1 to 5 parts of stabilizers, and 1 to 5 parts of regulator. The components are added into a high-speed dispersion device to be dispersed at a high speed, and the stable high-efficiency denitration ionic liquid can be formed by virtue of the dispersion and reaction. An application methodof the high-efficiency denitration ionic liquid comprises the following steps: spraying the prepared ionic liquid into a denitration reactor by using a spray gun, wherein the application temperatureis 450 to 1250 DEG C. According to the high-efficiency denitration ionic liquid and the application method thereof, the high-efficiency denitration ionic liquid is colorless, tasteless and non-corrosive liquid, is safe in transportation and storage, convenient and simple to use, free from secondary pollution, wide in operating temperature range, and capable of being operated at 450 to 1250 DEG C;the method does not cause any crystallization and blockage when in operation; and after the product is put into the high temperature area, the smoke sufficiently contacts the denitration ionic liquid,so that the reduction time of the liquid catalyst and the smoke can be increased, and the escaping can be avoided.

The invention relates to micro-bubble purifying apparatus and a micro-bubble purifying method. When gas enters the micro-bubble purifying apparatus, the gas is uniformly distributed under the action of a first-layer gas distributor, and enters a purifying chamber through holes of the first-layer gas distributor so as to form relatively tiny liquid bubbles; and then, the liquid bubbles ascend so asto capture most of dust due to contact of the dust with liquid membranes of liquid bubble walls of the liquid bubbles. When the gas passes through a second-layer gas distributor, speed of the liquidbubbles passing through plate holes increases, so that cutting effects on the liquid bubbles are enhanced so as to further break the liquid bubbles to form dust-capturing micro-bubbles; at the same time, cavitation effects and mechanical actions of ultrasound are utilized when cutting is performed on the liquid bubbles by the second-layer gas distributor, so that high-frequency vibration acts on surface walls of the micro-bubbles to break part of the micro-bubbles further; and thus, contact rate of the liquid membranes with particulates is increased due to vibration of surfaces of part of themicro-bubbles, so that contact frequency of smoke with the liquid bubble walls is improved so as to enhance gas-liquid mixing effects. Finally, fine dust in the smoke fully contacts with purifying liquid bubble walls so as to reduce escape probability, so that purification effects on fine dust is achieved.

The invention discloses a centralized type oil smoke purification system. The centralized type oil smoke purification system comprises an oil smoke purification device body, a negative pressure main pipeline system, a negative pressure branch pipeline system and a multi-user terminal oil smoke exhaust hood. The oil smoke purification device body is composed of a purification section, a middle section and an oil smoke exhaust section. A high-pressure static purification device is arranged in the purification section, the lower portion of the purification section is provided with an oil collecting tray and a drain outlet, and the lateral wall of the purification section is provided with a purification section access door. The middle section is used for equipment overhaul, and the lateral wall of the middle section is provided with a middle section access door. An oil smoke exhaust power device is arranged in the oil smoke exhaust section, a power-free device is arranged at the top of theoil smoke exhaust section, and an air outlet of the oil smoke exhaust power device communicates with the outdoor space. The purification device in the invention conducts centralized purification andcollection of oil smoke of a whole building, meanwhile, the outdoor atmosphere can be purified, and indoor and outdoor air environment quality is promoted.

The invention provides a back-illuminated CMOS (complementary metal oxide semiconductor) image sensor, comprising a device wafer and a positively-charged film layer, wherein the device wafer is provided with a front surface and a back surface, a photodiode is formed in the device wafer, and the photodiode is close to the back surface of the device wafer; and the positively-charged film layer covers the back surface of the device wafer. Via the positively-charged film layer, the potential barrier of an energy band close to the back surface of the device wafer is increased, and the difficulty in escaping from the photodiode of the electrons is increased, thus decreasing the probability that the electrons escape from the photodiode, and then increasing photon conversion efficiency and improving the imaging quality of the back-illuminated CMOS image sensor.

The invention provides an airfoil body device and a range hood, and relates to the technical field of kitchen appliances. The airfoil body device comprises a first smoke guide device and a second smoke guide device, the first smoke guide device is suitable for being connected to an exhaust fume collecting hood, the second smoke guide device is connected to the first smoke guide device, a fume inlet flow channel is defined between the first smoke guide device and the second smoke guide device, the first smoke guide device and / or the second smoke guide device is provided with a fume inlet communicating with the fume inlet flow channel, the lower surface of the second smoke guide device is a curved surface, and the curved surface is used for guiding fume to the fume inlet. The range hood comprises the airfoil body device. According to the airfoil body device and the range hood, the technical problems that in the prior art, a range hood adopting a conventional fume baffle is prone to fumeescape, and the fume dredging effect is poor are solved.

The invention discloses fish catching equipment capable of improving the catching rate. The fish catching equipment comprises a fish net, a traction rope and an insertion rod, and is characterized in that a weight balancing ring penetrates through the periphery of the fish net; the traction rope passes through the weight balancing ring; the bottom of the insertion rod is provided with a fixed pulley; a fork is arranged under the fixed pulley; the insertion rod can be fixed on the bottom of a feeding pool through the fork; a vertical rod is fixed on the bank of the feeding pool; the fixed pulley is arranged on the top of the vertical rod; a motor is arranged at one side, far away from the feeding pool, of the vertical rod. The fish catching equipment has the advantages that the structure is reasonable; the use is convenient; the fish catching mode of the fish catching equipment is the fish catching mode from top to bottom; the fish escaping probability is greatly reduced.

The invention discloses a spot check method and device for goods entrainment check of administrative vehicles in a customs special supervision area, and belongs to the technical field of computers.The spot check method for goods entrainment check of administrative vehicles in the customs special supervision area is used for a server side and is characterized by comprising the steps that first information is obtained, and the first information is vehicle identity information; a first random result or a second random result is generated through a random result program, and the first random result or the second random result generated by the random result program is matched with the first information; and the information of spot-checked vehicles is stored in the spot-check database, so that the vehicles needing to be checked cannot pass through any checkpoint channel before being subjected to entrainment check, and the probability that the vehicles escape by utilizing vulnerabilities is effectively reduced.

The invention provides a rotatable insect capturing device which comprises an insect inlet hopper and an insect storage box. A connecting groove is circularly formed in the periphery of the bottom ofthe insect inlet hopper, an insect outlet is formed in the outer wall of the insect storage box, a baffle plate is rotatably mounted at the insect outlet, and a driving motor is positioned at the topof the insect storage box and connected with a control switch through a power line. According to the device, when reptile insects fall into the insect inlet hopper, climbing escape difficulty of the reptile insects is increased through smooth end surface of the insect inlet hopper, the reptile insects are positioned at the bottom of the insect inlet hopper, capturing effect of the reptile insectsis guaranteed, use of the insect storage box is matched, the reptile insects captured by the insect inlet hopper fall into the insect storage box, the insects are stored by the insect storage box, sothat the bottom of the insect inlet hopper is leisure, and subsequent reptile insect capturing effects of the insect inlet hopper are guaranteed.

The pneumatic down-the-hole hammer drilling device comprises a drill rod, an impacter and a drill bit, a rear connector of the impacter is fixedly connected with the drill rod, a drill rod clamping sleeve of the impacter is connected with the drill bit, a shell of the impacter is provided with a slag collecting cavity, an opening of the slag collecting cavity is located in the peripheral face of the shell, and the opening of the slag collecting cavity is communicated with the drill rod. The shell is further provided with a guide plate and a first driving mechanism, the guide plate is located over an opening of the slag collecting cavity, and the end, away from the axis of the shell, of the guide plate is obliquely arranged downwards; the first driving mechanism is used for driving the guide plate to extend out of the outer side of the shell in a sliding mode or retract into the shell in a sliding mode. By arranging the extendable guide plate, when the disintegrating slag is blown by compressed air to move upwards, the movable disintegrating slag is guided into the slag collecting cavity by the guide plate, so that the disintegrating slag accumulation between the outer surface of the shell and the wall of the drill hole is reduced, and the drilling efficiency is ensured.

The invention discloses a moving net support which comprises a main rod and a plurality of supporting rods. The supporting rods and the main rod are bound together or connected together through an integrally-formed moving net head to form the moving net support, the supporting rods adopt hollow / solid fiber reinforced composite material tubes, and the supporting rods adopt the segmentation structures preferentially. The moving net support has the advantages of being firm in structure, easy to erect, convenient to transport and the like.

The invention discloses an intelligent escape prevention method, comprising the following steps: (1) preparing an intelligent escape prevention system; (2) monitoring video cameras collecting audio and video data in real time and transmitting them to a warning terminal and a command management center; intelligent escape prevention ankle rings The positioning information is transmitted to the warning terminal and the command management center in real time; (3) the warning terminal receives and stores audio and video data and positioning information, and when an abnormal situation occurs, an alarm signal is sent; (4) the command management center receives and stores audio and video data Combined with the positioning information, the geographical location of the audio and video data is displayed on the electronic map, and the movement trajectory is generated. If there is an abnormal situation, the warning terminal will be notified to automatically send an alarm signal. The invention also discloses an intelligent escape prevention method for implementing the above method. The present invention can acquire the audio and video data of the person under supervision and its surrounding environment and its movement path in real time, understand possible escape risks, prepare for prevention in advance, and improve supervision.

The invention relates to the field of insect trappers and in particular relates to a fly trapper. The fly trapper disclosed by the invention comprises a barrel body and a chassis, wherein a tray for accommodating an attractant is connected below the chassis; a window into which an insect can enter is arranged between the tray and the chassis; a transparent cover is arranged above the barrel body; an anti-escape device is also arranged on the chassis and is positioned in the barrel body and above the window, the anti-escape device is formed by sheathing a plurality of reverse funnel-shaped shells of different sizes, the big shells are positioned at the lower part of the anti-escape device, and the small shells are positioned at the upper part of the anti-escape device; and the top parts of the lower shells extend into the bottom parts of the upper shells among the adjacent shells. The fly trapper has the beneficial effects of improving the fly trapping effect, lowering the use cost, obtaining complete fly corpses, causing no influence on environment during a fly corpse disposal process, and facilitating the monitoring, identification and research performed on the population and density of local flies by scientific workers.

The invention relates to the technical field of household appliances, and discloses a kitchen range hood. The kitchen range hood comprises a machine shell, an air duct shell, an air collection cover and a draught fan. The air duct shell is fixedly connected into an inner cavity of the machine shell in a sleeved mode, the air collection cover is fixedly connected to one ends of the machine shell and the air duct shell, the draught fan is located in the machine shell and an air opening of the draught fan communicates with the inner cavity of the air duct shell, a mesh enclosure is arranged in the inner cavity of the air duct shell, and an impeller is connected to the bottom surface of the mesh enclosure through a connecting rod. According to the kitchen range hood, the impeller and a permanent magnet on the impeller are driven to rotate through the flowing of lampblack, so that the changing of the coil magnetic flux is caused, a current is generated in a coil, and the current is stored in a storage battery for use; and meanwhile, a magnetic patch in a scraping stripe rotates under the action of magnetic field force of the permanent magnet, so that the purpose of scraping oil dirt onthe air duct shell and the mesh enclosure is achieved, the cleanness degree of the interior of the range hood is improved, and the disassembly and cleaning frequency of the range hood is reduced.