5351 results about "Air filter" patented technology

The invention belongs to the technical field of engines, and particularly relates to a crankcase ventilation system, a hydrogen internal combustion engine and a crankcase ventilation system control method. The crankcase ventilation system comprises a crankcase, an oil-gas separator, an air filter and a control unit, a hydrogen concentration detection unit is arranged in the crankcase, an inlet of the oil-gas separator is communicated with a first communication port of the crankcase, the air filter is communicated with a second communication port of the crankcase through an air inlet pipeline, and the control unit is connected with the control unit. The air filter selectively communicates with the third communicating port of the crankcase through a first gas supplementing pipeline, and the control unit is in signal connection with the hydrogen concentration detection unit, the oil-gas separator and the air filter. By using the crankcase ventilation system in the technical scheme, the hydrogen concentration in the crankcase is always in a safe range, and the hydrogen internal combustion engine works stably.

The invention discloses rotating wheel drying and dehumidifying equipment with a moisture content monitoring function, the dehumidifying equipment comprises a bottom frame, a drying material barrel, a humidity tester, a box body and an air path assembly, the bottom frame is fixedly connected with the drying material barrel and the box body, the drying material barrel is fixedly connected with the humidity tester, the humidity tester is arranged at the bottom of the drying material barrel, and the box body is fixedly connected with the drying material barrel. The box body is fixedly connected with the gas path assembly, the gas path assembly comprises a drying gas path, the drying gas path comprises a return air filter and a drying electric heater, and the return air filter and the drying electric heater are both connected with the drying material barrel through pipelines; the invention relates to the technical field of drying and dehumidifying equipment, which can ensure continuous dehumidification, uninterruptedly and continuously output dry air, treat large-air-volume and high-humidity air, expand the range of a moisture absorption area, prolong the adsorption time, improve the single-time adsorption effect and ensure that the situation of dehumidification leakage is avoided. The moisture of the dried material is measured through infrared rays, and pollution and damage caused by contact measurement are avoided.

The invention relates to the technical field of tail gas treatment, and provides a tail gas denitration reactor for hydrogenation catalyst production, the tail gas denitration reactor comprises a treatment box and an adsorption shell mounted in the treatment box, one end of the adsorption shell is connected with a gas inlet pipe, the other end of the gas inlet pipe is connected with a gas outlet pipe, and two ends of the adsorption shell are provided with a plurality of connecting grooves; the upper end of the adsorption shell is connected with a first connecting frame and a second connecting frame. The two ends of the first gas filtering bin and the two ends of the second gas filtering bin are meshed and installed on the gear shaft, so that the gear shaft drives the first gas filtering bin and the second gas filtering bin to rotate, the first gas filtering bin and the second gas filtering bin alternately conduct tail gas adsorption work, and in the standby replacement process, the filter elements in the first gas filtering bin and the second gas filtering bin are cleaned; the device can adsorb tail gas in a long-term and high-quality mode, the problems that the filter element is blocked and the adsorption effect is reduced due to long-time use of the filter element are solved, and environment-friendly emission of the tail gas can be achieved in the hydrogenation catalyst production and manufacturing process.

The invention relates to the field of air filtration, in particular to a method for rapidly preparing ZIF-8 / polypropylene melt-blown cloth fiber membranes in batches at low cost. Aiming at the problems of high cost, long preparation time, complex process and the like of the existing method for growing ZIF-8 on the surface of polypropylene melt-blown cloth to improve the air filtering performance, the invention provides a method for rapidly preparing ZIF-8 / polypropylene melt-blown fiber membranes in batches at low cost. The preparation method comprises the following steps: firstly, pretreating the surface of polypropylene melt-blown cloth by using an inorganic aqueous alkali solution, then sequentially putting the melt-blown cloth into a zinc ion aqueous solution and a 2-methylimidazole / N, N-dimethylformamide mixed aqueous solution under an ultrasonic condition, and drying to prepare the ZIF-8 / polypropylene melt-blown fiber membrane. According to the preparation method, water is taken as a main solvent, and a small amount of N, N-dimethylformamide is added into the water, so that rapid growth on polypropylene melt-blown cloth at a small molar ratio of 2-methylimidazole to zinc nitrate hexahydrate is realized, and the preparation method is suitable for large-scale industrial production for air filtration.

The invention relates to the technical field of tunnel ventilation and environmental protection, in particular to an efficient and energy-saving tunnel ventilation and dust removal integrated system. Data analysis and decision making; ventilation control; dust removal operation; and sewage treatment. The intelligent sensing module is installed in the tunnel, environment parameters of different positions can be accurately obtained in real time and transmitted to the central control system, the efficient and energy-saving draught fan is selected, the frequency conversion and speed regulation device is installed, energy consumption is reduced, and by arranging the air filtering device and the dust falling device, the dust falling efficiency is improved. The dust collection device and the dust blocking device arranged at the tunnel portal effectively control the air environment quality in the tunnel, sewage purification and cyclic utilization are achieved through sewage treatment, and the system is high in intelligent degree, can be flexibly adjusted according to the actual situation and is suitable for popularization and application. The problems that a traditional ventilation and dust removal mode is high in energy consumption, poor in effect, lack of intelligent control and the like are effectively solved, the health of constructors is guaranteed, and pollution to the surrounding environment is reduced.

An Air filtering device (1) configured to cleaning of air in a closed volume of air. (1) comprises in a direction (2) of an air flow at least one air filter unit (3). The air filter unit (3) comprises an air filter (5) arranged in a box-shaped housing (4). The air filtering device (1) further comprises an air moving unit (6) interconnected to and arranged downstream with respect to the air filter unit (3). The air moving unit (6) comprises a box-shaped housing (7) with an air inlet opening (8), configured to receive filtered air from the closed volume of air through the air filter unit (3) and with respect to the box-shaped housing (7) opposite an air outlet opening (9) comprising a constriction having a smaller diameter (10) than the diameter of the air inlet opening (8). The air moving unit (6) also comprises a fan (11) interconnected to the air outlet opening (9) configured to draw in the filtered air from the air filter unit into the box-shaped housing (7) through the air inlet opening (8) and to push the filtered air into an air distribution unit (12). The air distribution unit (12) comprising a box-shaped housing (13) interconnected to the fan (11) and having at least one air vent (14) to distribute the filtered air into the closed volume of air.

A direct plug-in air purifier, including a front shell, a rear shell, an air ionizer, a fan, and a front cover. The front shell includes a recessed portion configured to hold a mechanical air filter. The rear shell is attached to the front shell and includes an air outlet. The air ionizer and the fan are disposed in a space defined between the front shell and the rear shell. The front cover is releasably attached to the front shell and configured to allow air to pass therethrough. The fan is configured to draw air through the front cover, the mechanical filter, and an air guide formed in the recessed portion, and to expel air through the air outlet.

The invention discloses an indoor air filter, and relates to the technical field of air treatment, the indoor air filter comprises a machine body and an air duct, and further comprises a first partition plate, the top of the first partition plate is provided with a rotary drum, the outer wall of the rotary drum is provided with two through holes, and the through holes are internally provided with filter screens; the driving mechanism is used for driving the rotating drum to rotate; an air guide mechanism; a second partition plate; the linkage air control mechanism comprises an air cylinder mounted at the bottom of the second partition plate, a first piston mounted in the air cylinder and a lifting frame mounted at the top of the first piston; air is filtered by exchanging the two filter screens, the problem that in the prior art, the filter screens need to be cleaned after shutdown is solved, the continuous use effect of the air filter is guaranteed, the surfaces of the replaced filter screens are cleaned in a closed mode through the cleaning mechanism, and the cleaning efficiency is improved. And the directional dust removal mechanism is matched to timely and directionally guide out the cleaned dust impurities, so that the problem that the dust impurities are easily attached to the surface of the filter screen again and are difficult to clean thoroughly when the filter screen is cleaned is solved.

The utility model relates to the technical field of bag-type dust removal, in particular to a pulse-type bag-type dust remover. Comprising a shell, a top cover, supporting legs, an air inlet pipe, an air outlet pipe, an air conveying pipe, a nozzle, a dust removal cloth bag and a blow-off pipe, a fixing frame is fixedly installed below an inner cavity of the shell, a double-shaft motor is installed on the fixing frame, a scraper is fixedly installed at one end of an output shaft at the bottom of the double-shaft motor through a fixing rod, and a rotating plate is fixedly installed at one end of an output shaft at the top of the double-shaft motor; and a plurality of convex blocks capable of striking the dust collecting cloth bag are fixedly arranged on the rotating plate. Dust attached to the outer wall of the dust collecting bag can be completely removed, and the air filtering efficiency is guaranteed.

The invention discloses a gas compressor inlet air filtering device, and relates to the technical field of compressor inlet air filtering, the gas compressor inlet air filtering device comprises a base, a support frame, a fixed sleeve, a rotating sleeve, a filter screen, a partition plate, an air inlet pipe and a backflushing pipe, one side of the fixed sleeve is provided with a vent hole and an ash discharge hole, and the other side of the fixed sleeve is provided with an air inlet hole and a backflushing hole; the rotating sleeve is rotatably arranged in the fixed sleeve, the filter screen is fixedly arranged at one end of the rotating sleeve, the partition plates are fixedly arranged in the rotating sleeve and divide the rotating sleeve into a plurality of independent cavities, and one end of the air inlet pipe and one end of the backflushing pipe are slidably arranged in the air inlet hole and the backflushing hole respectively. And the other ends of the air inlet pipe and the back-flushing pipe are propped against the filter screen. The back-flushing cleaning process of the air inlet filtering device does not need to stop the operation of the compressor, so that the production continuity is ensured, the production efficiency is improved, the production stagnation time caused by shutdown is reduced, the overall production efficiency is improved, and the economic loss caused by shutdown is reduced.

The invention belongs to the technical field of air filtering, particularly relates to an air filtering device for metal powder processing, and aims to solve the problems of short service life and difficulty in replacement of a filter screen plate in the background technology, the air filtering device comprises a bottom pipe, a top pipe is arranged on the outer wall of the top of the bottom pipe, and the top pipe is arranged on the outer wall of the top of the bottom pipe. A filter plate replacing mechanism for conveniently replacing the filter plate and a filter plate cleaning mechanism for prolonging the service life of the filter plate are arranged on the bottom pipe and the top pipe, each of the filter plate replacing mechanism and the filter plate cleaning mechanism comprises two parts, and one part is positioned in the bottom pipe and the top pipe. Under the action of the filter plate cleaning mechanism, the filter screen plate between the bottom pipe and the top pipe can be cleaned, the filter screen plate can be automatically cleaned in the pipeline, the cleaning difficulty is greatly reduced, the service life of the filter screen plate is prolonged, the filter screen plate can be quickly replaced through the action of the filter plate replacement mechanism, and the screen replacement time is saved.

The invention belongs to the technical field of environmental protection equipment, and particularly relates to a textile workshop automatic dust filtering device which comprises an outer cylinder, a filtering mechanism used for filtering fiber dust in a textile workshop is arranged in the outer cylinder, and the filtering mechanism comprises a rotatable lower flow guide blade and a rotatable upper flow guide blade. The size of the lower flow guide blade is larger than that of the upper flow guide blade, a rotatable filter cartridge is arranged on the outer side of the lower flow guide blade, a plurality of connecting frames are arranged above the upper flow guide blade, and the connecting frames are arranged in an inclined mode. The friction balls on the surfaces of the matching rods adsorb and roll impurities filtered by the filter cartridge, the filter cartridge is self-cleaned, the situation that fiber chippings adhere to the filter cartridge to affect the air filtering effect of the filter cartridge is avoided, the filtering effect of the filter cartridge can be effectively improved, and the dust filtering efficiency of the dust filtering equipment on a textile workshop can be improved.

The invention relates to a surge control method and device, a vehicle and equipment, and relates to the technical field of vehicles, and the method comprises the steps: obtaining the in-pile flow and a surge control threshold value of a fuel cell; the in-pile flow is the flow of reaction gas entering the electric pile of the fuel cell; the in-pile flow is determined based on the air filter flow and the estimated bypass flow; based on the in-pile flow and the surge control threshold, judging whether an air system of the fuel cell meets a surge control condition or not; the surge control condition is used for representing a condition for performing surge control on the air system; and if the air system meets the surge control condition, surge control is conducted on the air system. Therefore, surge control is effectively carried out on the air compressor.

The invention relates to the technical field of air filters, and specifically to a dry chemical filter for air purification, comprising a frame, a dry filter box, a filtering structure, a mounting structure, an opening and closing structure, a scraping structure and a closing structure; the dry filter box is opened by the opening and closing structure, so that the internal coarse-effect filter, medium-effect filter, chemical filter element and high-efficiency filter are conveniently taken out, and the parts inside the dry filter box are conveniently inspected and maintained, and the sealing is good, thereby improving the purification effect; the dust, pollutants and toxic and harmful chemical pollutants in the air are filtered in layers by the filtering structure, and the coarse-effect filter, medium-effect filter, chemical filter element and high-efficiency filter are quickly disassembled by the mounting structure, thereby improving the installation and disassembly efficiency of the coarse-effect filter, medium-effect filter, chemical filter element and high-efficiency filter; the dust particles adhered to the coarse-effect filter are scraped off by the scraping structure, thereby improving the filtering effect of the coarse-effect filter.

Mobile or stationary air filter (L) or room fan (RL) according to Figure 1, comprising an outer wall (5), a (2) for generating an airflow (3) which is guided through an air filter material (1.1), an air inlet (2.1) and an air outlet (2.2), wherein the air filter material (1.1) contains poly(styrenesulfonic acid) (sulfonic acid biocide) (1.3) cross-linked with divinylbenzene and / or an acidic salt (1.3.1) (sulfonic acid biocide salt) of the sulfonic acid biocide (1.3) with biocidal cations, wherein the sulfonic acid biocide (1.3) and / or sulfonic acid biocide salt (1.3.1)(i) are positively and / or materially bonded to and / or in inert carriers and, in the fixed state, are in direct contact with carrier materials (1.1.7) on and / or in which biocidal Metal microparticles of a mean particle size d50 of 0.1 µm to <1,000 µm are fixed, and / or (ii) with carrier materials (1.1.7) on and / or in which biocidal metal microparticles of a mean particle size d50 of 0.1 µm to <1.000 µm are fixed, are mixed; its use and methods for the production and environmentally friendly disposal of air filter materials (1.1).

The invention relates to the technical field of gas turbine gas inlet filtering devices, and discloses a gas turbine gas inlet filtering device and a using method thereof.The gas turbine gas inlet filtering device comprises a gas inlet pipe, and a first mounting box and a second mounting box are fixedly and symmetrically mounted on the outer surfaces of the two opposite sides of the gas inlet pipe correspondingly; the side, away from the air inlet pipe, of the first mounting box is of an opening structure, a second roller and a first roller are rotationally mounted between the top wall and the bottom wall of the first mounting box and the top wall and the bottom wall of the second mounting box correspondingly, the outer surfaces of the second roller and the first roller are sleeved with a filter belt, and a plurality of filter holes are evenly formed in the outer surface of the filter belt in a penetrating mode; the outer surfaces, close to the first mounting box and the second mounting box, of the air inlet pipe are both provided with openings for the filter belt to pass through in a penetrating mode. Dust on the inner side and the outer side of the filter belt is cleaned through the air blowing and sucking mechanism, and it is avoided that filter holes formed in the filter belt are blocked by the dust, and the air filtering effect is affected.

The utility model relates to an air filter element device of an air compressor, and relates to the field of air filtration. The air filter element device comprises a shell, a plurality of air filter elements are arranged in the shell, the shell is provided with air conveying pipes in one-to-one correspondence with the air filter elements, a sealing disc used for connecting the air conveying pipes and the air filter elements is arranged in the shell, and one end of the sealing disc abuts against the sealing disc; the inner wall of the shell is provided with a quick release assembly used for connecting the air filter element with the air conveying pipe, and one side of the shell is provided with a cabin door. The multiple air filter elements are placed in the shell, the air filter elements are fixed to the inner wall of the shell through the fixing assemblies, the air filter elements correspond to the air conveying pipes one to one, and an operator only needs to regularly observe the states of the filter elements in the shell to judge whether the filter elements need to be replaced or not; and an operator can conveniently mount and dismount the air filter element through the quick dismounting assembly, so that the effect of uniformly managing the air filter elements of a plurality of air compressors in the same oxygen generator is realized.

The invention relates to a heat-resistant test technology for a filter element of an air filter, in particular to a heat-resistant airflow test device and method for the filter element of the air filter. The air filter element hot airflow resistance test device comprises a fan, a heater, an air inlet pipe, a test box body and a main air outlet pipe, one end of the heater is connected with the fan through a first air pipe, the other end of the heater is connected with the air inlet pipe through a second air pipe, the other end of the air inlet pipe is connected with the test box body, and the other end of the test box body is connected with the main air outlet pipe; the second air pipe is provided with a three-way electromagnetic valve and is connected with a bypass pipe through the three-way electromagnetic valve; and a filter element mounting part is mounted in the test box body. The test device provided by the invention has the function of inputting the hot air flow with the preset temperature and flow, and the hot air flow with the preset temperature and flow is input to realize the heat-resistant air flow test on the filter element of the air filter; the test method provided by the invention provides a new thought of how to carry out the hot airflow resistance test of the filter element of the air filter.

The utility model relates to an experimental device for detecting learning memory of insects. The experimental device comprises a smell conveying device and a conditional training device. The smell conveying device comprises an air pump which is connected through a hose and located outside the box body, and an air filter, an air humidifier / flowmeter, a smell source chamber and a smell release pipe which are sequentially connected through the air pump through hoses, the conditioned training device is composed of an isolation chamber and an insect body fixator, the isolation chamber is of a hexahedron structure, the right face of the isolation chamber is provided with an opening, and the opening face is provided with an air outlet; the odor releasing pipe penetrates through the left side face of the isolation chamber and forms an included angle of 15-45 degrees with the bottom face of the isolation chamber, the left side, the front side, the rear side and the upper face of the isolation chamber are composed of light transparent thin plates, the bottom face is wrapped with a film, a micro-hole is formed in the center of the film on the bottom face, the insect body fixing device is located below the micro-hole of the isolation chamber, and an exhaust fan is arranged on the right side wall of the box body. The device is reasonable in structure, and can evaluate whether insects can establish the combined learning and memory ability of conditional odor stimulation and volatile compound or non-volatile food intake.

The invention provides an air filter type selection system and method based on carbon footprint management, and the air filter type selection system based on carbon footprint management comprises a product database module and a data simulation module. The data simulation module is connected with and calls the product database module; the invention discloses an air filter type selection method based on carbon footprint management. The method comprises the following steps: S1, establishing a product database; s2, inputting demand side information; s3, newly establishing a filter scheme; s4, selecting an energy-saving scheme; the method is suitable for a single-stage or multi-stage air filter scheme, the actual use condition of the air filter is simulated by inputting demand side information, calculation is carried out by adopting a step-by-step calculation principle, the use scheme is calculated step by step, it is ensured that final simulation data is calculated according to parameters of each stage of filter, and the calculation efficiency is improved. Total carbon footprint accounting is completed in the air filter type selection stage through data simulation, an energy-saving scheme can be derived, the application range is wide, and adaptability is high.

The invention provides a hydrogen fuel electric light truck whole truck structure. The hydrogen fuel electric light truck whole truck structure comprises a cab, a container, a truck frame, a hydraulic tail plate system, a hydrogen system, an electric system, a cooling system and an air brake system. The hydraulic tail plate system comprises a hydraulic tail plate, a hydraulic tail plate oil original tank, a hydraulic tail plate controller and a hydraulic tail plate cross beam; the hydrogen system comprises a hydrogen fuel electric pile, a left hydrogen storage tank, a right hydrogen storage tank, an air inlet air filter and an exhaust silencer; the power system comprises a battery pack, an all-in-one unit, a DCDC, a DCAC, a PTC, a hydrogen stack high-voltage box, a battery high-voltage box, a charging port and a low-voltage power supply unit; the cooling system comprises a high-pressure radiator, a low-pressure radiator, a low-pressure radiator water replenishing tank, a high-pressure radiator water replenishing tank, an air conditioner condenser, an air conditioner electric compressor and an integrated kettle; the air brake system comprises an inflating pump, a drying tank, a lower air cylinder, an upper air cylinder, a front axle and an electric drive axle. The layout of the whole truck can be optimized, so that the hydrogen fuel electric light truck can be compatible with an air brake and a hydraulic tail plate.

The utility model discloses a collecting device for ambient air detection, which comprises an air collecting tank, the air outlet end of the air collecting tank is hermetically connected with a primary air filter tank through a first air pipeline, an HEPA (High Efficiency Particulate Air) air filtering structure layer is arranged in the primary air filter tank, and an air pressure monitoring meter is arranged outside the primary air filter tank. The first-stage air filter tank is connected with a second-stage air filter tank in a sealed mode through a second air conveying pipeline, a plurality of activated carbon adsorption face nets are arranged in the second-stage air filter tank, and the air outlet end of the second-stage air filter tank is connected with an air detection box in a sealed mode through a third air conveying pipeline. According to the utility model, after the air in the surrounding environment to be detected is rapidly collected, the primary air filter tank is arranged to be matched with the secondary air filter tank, so that impurity particles in the air can be thoroughly removed, and the filtered air can be conveniently input into the air detection box for chemical component detection; the influence of impurity particles in the air on the detection result is prevented.

The invention relates to the technical field of fuel cells, in particular to a fuel cell system air filter blockage early warning method, system and device and a medium, and the method comprises the steps: collecting geographic position information and air filter inner side pressure data in a target area in real time when a vehicle runs; constructing an atmospheric pressure estimation model by utilizing a clustering algorithm, and calculating current atmospheric pressure by utilizing the atmospheric pressure estimation model according to the geographical location information to obtain atmospheric pressure data of the outer side of the air filter; comparing the atmospheric pressure data on the outer side of the air filter with the pressure data on the inner side of the air filter to obtain the pressure difference between the two sides of the air filter; and detecting the air filter according to the pressure difference between the two sides of the air filter and a predetermined self-adaptive early warning threshold value, and generating an air filter blockage early warning signal. According to the method, the geographic position and the pressure data on the inner side of the air filter are collected in real time, the atmospheric pressure estimation model and the self-adaptive early warning threshold value are combined, and accurate early warning of the air filter blockage state is achieved.

The utility model relates to the technical field of industrial system air purification filters, and particularly discloses a V-shaped filter which comprises a filter element, a rubber line and an outer frame. And the filter element is positioned on an air circulation path in the filter and is formed by folding a whole piece of filter paper. The glue line is a continuous glue line and is adhered to the surface of the filter paper, and two ends of the glue line coincide with two ends of the filter paper. The outer frame is located on the peripheral side of the filter element, abuts against the filter element and is bonded with the glue line. The air filter has the effects of improving the purification air volume and meeting the industrial waste gas purification requirement.

The present invention relates to the field of dust removal technology, specifically an environmentally friendly air dust removal device, including a filter cartridge, a support frame, an air inlet, an air outlet and an auger spiral. The filter cartridge is cylindrical in shape, its axis is horizontal, and one side of its lower part has a discharge port. The support frame is located below the filter cartridge, and the support frame and the filter cartridge are elastically connected. The present invention is provided with an auger spiral, and sawdust generated by processing solid wood boards is used as an air filter medium, turning waste into treasure. The sawdust is compressed by the auger spiral, so that the sawdust forms a large surface area and a porous structure, so that when air passes through the sawdust, dust and other particulate matter and impurities in the air can be adsorbed by the sawdust, thereby achieving the effect of purifying the air, and combining the ecological concept of energy saving and environmental protection.

The invention discloses a low-concentration carbon dioxide trapping system and method, and belongs to the technical field of gas separation and trapping. The system comprises an air filter, a zeolite adsorption rotating wheel, a desorption heater, a desorption fan, a centrifugal fan, a pressure swing adsorption module (at least comprising double towers), a vacuum pump, a CO2 storage tank, a rear-end purification and utilization system and a control system. According to the method, trapping is realized through pretreatment, first-stage adsorption concentration, desorption transfer, second-stage purification, collection and storage and circulating operation. The zeolite adsorption rotating wheel is used for adsorbing and concentrating low-concentration CO2, and then the low-concentration CO2 is purified through the pressure swing adsorption module, so that the problems of low low-concentration trapping efficiency and high energy consumption in the prior art are solved. The device has the advantages of high trapping efficiency, low energy consumption, continuous operation, wide application scene and the like, is suitable for trapping low-concentration CO2 in atmosphere and industrial tail gas, and provides an efficient technical scheme for carbon emission reduction.

The invention discloses a gas analysis control device for an oxygen cabin. The gas analysis control device comprises an air compressor, an oxygen tank, an air filter, an air inlet electric control valve, an exhaust electric control valve, the oxygen cabin and a gas analysis control system, the gas analysis control system comprises an air quality sensor, an air quality monitoring system, an oxygen concentration sensor, an oxygen concentration monitoring system and a control system; the automatic control technology is applied, the flow of the gas introduced into the oxygen cabin is fed back and adjusted according to the detected air quality and oxygen concentration data, the gas content in the cabin finally reaches the standard through multiple times of feedback adjustment, the treatment quality is ensured, and the requirement for the comfort degree of people in the cabin is met. Meanwhile, the control system can timely find out faults by monitoring the gas data change condition in real time, and the working stability and safety of the oxygen cabin are ensured.

The invention discloses a crankcase air supply system, a crankcase air supply control method, a controller and a vehicle, and relates to the field of hydrogen internal combustion engines. The crankcase air supply system comprises a first air supply pipeline communicating with an air outlet of a supercharger and a first end of a four-way valve, and a second air supply pipeline communicating with an air outlet of a pressurized air storage tank and a second end of the four-way valve; the air outlet of the air filter of the hydrogen internal combustion engine is communicated with the third end of the four-way valve, the four-way valve is communicated with the air supply port of the crankcase, and when the hydrogen internal combustion engine is in a high-load and high-moisture state, the opening degree of the first flow adjusting valve is controlled to be larger than that of the second flow adjusting valve. The opening degree of the second flow adjusting valve is larger than that of the third flow adjusting valve. The method is implemented on the basis of the supercharger, the pressurized gas storage tank and the air filter, and the opening degree of each flow regulating valve is regulated, so that the inlet gas water content is reduced while the gas supplementing requirement of the crankcase is met, and the aim of improving the operation reliability of the hydrogen internal combustion engine is achieved.

The invention relates to a heating, ventilation and / or air conditioning device (10) for a motor vehicle, comprising a housing (12) defining an air duct (11) for the passage of an airflow comprising—an inlet module (8), comprising at least one air inlet (15, 16), an air filter (70) being arranged within the inlet module (8), and—a distribution module (9) comprising at least one air outlet (27, 29, 30), the inlet module (8) and the distribution module (9) being detachably assembled to one another; according to the invention, the inlet module (8) is configured to be arranged in a first area of the vehicle, and the distribution module (9) is configured to be arranged in a second area of the vehicle, the air filter (70) being able to be removed from the second area of the vehicle. The invention also relates to a motor vehicle comprising such a device.

The invention belongs to the technical field of lung function nursing, and discloses a nursing device for improving lung function after thoracic surgery, comprising: a back plate, two sides of the lower end of the back plate are respectively provided with an air filter box and a waste liquid inbox; an outlet of the air filter box is connected with a breathing mask through a hose; a mouthpiece is fixedly arranged on the breathing mask; a suction pump is arranged on the waste liquid inbox, the input end of the suction pump is communicated with a sputum suction pipe, and the sputum suction pipe is in sliding connection with the breathing mask; elastic ropes are fixedly arranged on the two sides of the lower end of the back plate, handles are fixedly arranged at the outer ends of the elastic ropes, and a monitoring mechanism is fixedly arranged on the back plate. The device can be conveniently used when a patient lies in bed, the device can be fixed to the back through the shoulder buckle belt and the waist buckle belt, the patient can hold the handles with two hands to stretch the elastic rope to conduct chest expanding training, the comprehensive evaluation module comprehensively evaluates the physical condition and the lung function condition of the patient, the drainage monitoring module monitors the drainage condition, and the risk prediction module conducts risk prediction.