26results about How to "Continuous filtration" patented technology

The invention discloses continuous purification equipment for sewage treatment, and relates to the technical field of sewage treatment, the continuous purification equipment comprises a treatment cylinder, the top of the treatment cylinder is provided with a cylinder cover, and the side wall of the treatment cylinder is provided with a mounting rack. Through the arrangement of the baffle, the sealing plate, the L-shaped telescopic plate, the limiting column, the chute, a limiting plate, an adjustable-speed motor, a first bevel gear, a second bevel gear, a connecting shaft and a mounting block, the blockage time of the filtering mechanism is adaptively judged along with the adding amount of a flocculating agent, so that the backwashing frequency of the filtering mechanism is adjusted, manual adjustment is not needed, convenience and rapidness are achieved, and the practicability is high. The device is simple in structure and high in applicability, through the arrangement of the filtering mechanism, automatic overturning for backwashing along with the blocking speed of the first filter plate is achieved, no additional water resource is needed for backwashing, and through the arrangement of the second filter plate, when the first filter plate is overturned for backwashing, the second filter plate can continue to conduct certain filtration; continuous filtration of sewage is ensured, and the sewage treatment working efficiency is improved.

The invention discloses a waste gas treatment device for new energy industrial automobile production, and particularly relates to the technical field of waste gas treatment.The waste gas treatment device comprises a treatment box, a double-cylinder reverse filtering set is arranged on the lower side of the interior of the treatment box, the bottom end of the treatment box is fixedly connected with a gas suction pipe, and a bidirectional spraying assembly is arranged on the upper side of the double-cylinder reverse filtering set; a self-circulation assembly is arranged on the upper side of the bidirectional spraying assembly, and an air injection assembly is arranged on the upper side of the self-circulation assembly. According to the invention, double cylinders in the double-cylinder reverse filtering group rotate reversely to intercept waste gas in a layered manner and disturb airflow at the same time for preliminary filtering, and then a vertical three-dimensional spraying field is formed through cooperation of the bidirectional spraying assembly and the self-circulation assembly, and a filtering layer in the self-circulation assembly is cleaned; and finally, the adsorption and interception efficiency of small particles is improved through shaking of the air injection assembly, self-cleaning is achieved, and the treated automobile paint spraying waste gas can reach the standard to be discharged.

The utility model relates to the technical field of down silk filtering, and discloses a device for filtering down silk in down products by utilizing static electricity, which comprises a filtering chamber, a raw material bin, a feeding hole, two air inlets, a dustproof net, an air blower, an electrostatic generator and a filtering assembly, two rotating connecting pieces are fixedly connected to the front end of an inner cavity of the movable groove at equal intervals, a rotating shaft is rotatably connected between the two rotating connecting pieces, a cover plate is fixedly connected to one side of the outer surface of the rotating shaft, a discharging bin is fixedly connected to the right end of the filtering chamber, and a discharging pipeline is fixedly connected to the bottom end of the discharging bin. Down silk and impurities in an inner cavity of the filtering chamber are charged through the electrostatic generator, the cross-shaped filtering plate is charged by the power supply, the down silk and the impurities are adsorbed on the surface of the cross-shaped filtering plate through the opposite charges, the cover plate is convenient to open and close through the movable groove, the filtering assembly is convenient to clean and replace, and the filtering effect of the device is guaranteed.

The invention relates to the technical field of waste gas treatment, and discloses laboratory fume hood waste gas treatment equipment which comprises a treatment box, an air inlet pipe is fixedly connected to the front side face of the treatment box, a reciprocating lead screw is arranged in the air inlet pipe, and fixing clamping plates are fixedly connected to the upper face and the lower face of the inner wall of the treatment box. According to the device, large-particle impurities in waste gas are blocked by the filter plate and separated from the waste gas, so that the waste gas is preliminarily filtered, follow-up treatment is facilitated, the large-particle impurities on the filter plate are shaken off through vibration of the movable clamping plate and the filter plate, the filter plate is prevented from being blocked, continuous filtering is facilitated, and the filtering efficiency is improved; large-particle impurities falling into the treatment box can be treated by pushing a sliding baffle to open the treatment box, and at the moment, a filtering plate can be taken out to be cleaned, so that the large-particle impurities cannot be accumulated in the treatment box, and the waste gas filtering effect of the device is further promoted.

The utility model discloses an anti-fouling and anti-blocking device for a sewage treatment ceramic membrane, and relates to the technical field of industrial sewage treatment. The device comprises a ceramic membrane tube which is vertically arranged; covers are correspondingly sealed and fixed at the upper and lower ends of the ceramic membrane tube; a packaging shell is sleeved outside the ceramic membrane tube; the ceramic membrane tube is positioned on the lower side in the packaging shell; the cover cap is fixed to the packaging shell through a supporting column. The lower end of the packaging shell fixedly communicates with a drainage pipe. Water inlet pipes are fixedly communicated with the covers respectively; the water inlet pipes penetrate through the packaging shell in a sealed mode and communicate with a collecting pipe arranged outside the packaging shell. The ceramic membrane tube is provided with a back-flushing decontamination assembly; the back-flushing pollution discharge assembly comprises an expansion piece fixed at the upper end of the packaging shell; the telescopic end of the telescopic device vertically and downwards extends into the packaging shell and is fixedly provided with a supporting frame. The industrial sewage filter has the beneficial effects that the industrial sewage filter can filter industrial sewage, and meanwhile, the ceramic membrane tube can be continuously backflushed and decontaminated, so that the workload is reduced, and the treatment efficiency of the industrial sewage is ensured.

The utility model discloses a filtering device for processing fructus hippophae, belongs to the technical field of fructus hippophae processing, and aims to solve the problem that in the prior art, a new empty container needs to be replaced after a container positioned below a blanking hopper is full, so that raw pulp flowing out of the blanking hopper cannot flow to the ground during replacement, and waste is caused. The problem that the filtering efficiency of the sea buckthorn fruit puree is affected due to interruption of the filtering work caused by the need of stopping the filtering work of the sea buckthorn fruit puree in the prior art is solved. Comprising a vibration selecting screen body, a discharging hopper is fixedly connected to the left end of the vibration selecting screen body, a sealing mechanism is arranged at the left end of the discharging hopper, the sealing mechanism comprises limiting frames fixedly connected to the front portion and the rear portion of the left end of the upper side of the discharging hopper, and a top plate is fixedly connected to the upper sides of the limiting frames; springs are fixedly connected to the front end and the rear end of the lower side of the top plate, partition plates are fixedly connected to the lower ends of the springs, and pull rods are fixedly connected to the upper ends of the left sides of the partition plates.

The utility model relates to the technical field of stainless steel pickling, in particular to a stainless steel pickling device which comprises a pickling tank and a water pump, the bottom end of the pickling tank is fixedly connected with supporting legs, the outer side of the pickling tank is fixedly connected with a fixing frame, and the other end of the fixing frame is fixedly connected with a motor. The device comprises a motor, a fixing frame and a cover plate, a connecting shaft connected through a coupler is arranged at the output end of the motor, a disc is fixedly connected to the end, away from the motor, of the connecting shaft, and a straight rod is fixedly connected to the edge of one side of the disc. A stainless steel product needing acid pickling can be placed in the cleaning cage composed of the disc and the straight rod, the cleaning cage rotates in an acid pickling solution under driving of the motor, the stainless steel product in the cage rolls in the cage and makes full contact with the acid pickling solution, cleaning and deslagging can be better conducted on the stainless steel product, and the cleaning time is shortened.

The utility model discloses a sewage lifter convenient for deslagging, and relates to the technical field of sewage lifters. The device comprises a main body shell, an arc-shaped filter screen is arranged in the main body shell, a partition plate is arranged at the first end of the arc-shaped filter screen and divides the main body shell into a sewage area and a residue storage area, a residue discharge valve communicated with the residue storage area is arranged on the side portion of the main body shell, a transmission shaft is arranged in the arc-shaped filter screen in a rotating fit mode, and the transmission shaft is connected with the arc-shaped filter screen in a rotating fit mode. A plurality of scraping plates are arranged on the transmission shaft in a circumferential array mode, and a servo motor used for driving the transmission shaft is arranged on the outer side of the main body shell. According to the utility model, sewage is discharged into the arc-shaped filter screen, the servo motor drives the transmission shaft to drive the scrapers to rotate, and the sewage between the two adjacent scrapers is pushed to be filtered on the arc-shaped filter screen, so that the filtered sewage is conveniently separated from the entering sewage through the scrapers, and the sewage filtering efficiency and the filtering effect are conveniently improved.

The utility model relates to a filtering and backwashing system which comprises N pressurizing and filtering units, N is greater than or equal to 2, and each pressurizing and filtering unit comprises a filter and a pressurizing pump which are connected in series; each pressurizing and filtering unit is correspondingly provided with one electric valve; the controller is electrically connected with the booster pump and the electric valve, and by adopting the filtering and backwashing system, the problem of production interruption caused by backwashing of a filter in the prior art can be improved.

The utility model discloses an overflow type vacuum ultraviolet pretreatment device for relieving pollution of ultrafiltration membrane, which comprises an ultraviolet treatment box, an ultrafiltration membrane component and a backwash pump which are communicated in sequence, the ultraviolet treatment box comprises a transversely arranged cylindrical shell, a plurality of horizontally arranged and uniformly distributed vacuum ultraviolet lamp tubes are arranged in the shell, and the vacuum ultraviolet lamp tubes are connected with the backwash pump. A support is arranged in the shell, supporting columns are arranged at the two ends of the shell respectively, and the two ends of the vacuum ultraviolet lamp tube are fixed to the supporting columns. The device adopts a vacuum ultraviolet lamp tube as a light source, can split water to produce active oxide species in situ, does not need to add an oxidizing agent, can realize effective oxidation of pollutants, realizes pretreatment in the process that water flow is conveyed to ultrafiltration through an ultraviolet treatment box, and prevents organic pollutants and biological pollutants in water from polluting an ultrafiltration membrane; according to the ultrafiltration membrane cleaning device, the treatment efficiency of the ultrafiltration membrane can be improved, and the backwashing pump is arranged, so that water flows back when the ultrafiltration membrane is cleaned, pollutants blocked on the ultrafiltration membrane are washed away, and the continuous filtering effect of the ultrafiltration membrane is guaranteed.

The utility model relates to the field of traditional Chinese medicine residue filtering, and discloses a traditional Chinese medicine residue filtering mechanism which comprises a sealing part, a filtering box and a driving part, and the sealing part is fixedly installed on the outer surface of the upper portion of the driving part; a filtering part is rotationally mounted in the upper end of the driving part; the filtering part comprises a rotating shaft and a limiting frame, the limiting frame is fixedly connected to the outer surface of the rotating shaft, limiting grooves are evenly formed in the outer surface of the limiting frame, limiting rods are arranged at the four corners in each limiting groove, and a filtering net plate is slidably clamped in each limiting groove; by controlling the matched operation of the filtering part, the sealing part and the driving part, the filtering part can be circularly controlled to rotate in the filtering box to deflect and convey medicine residues, so that the continuous filtering of liquid medicine is realized, the medicine residues are automatically discharged, and the filtering efficiency of the liquid medicine is improved.

The utility model relates to the technical field of epoxy resin processing, in particular to a filter in an epoxy resin processing system, and solves the problems that in the prior art, when epoxy resin is treated by a filtering method, materials are generally directly poured on a filter plate for filtering, so that the operation is inconvenient, the materials are difficult to quickly filter, and the cost is high. And as the viscosity of the epoxy resin is relatively high, the filtering speed is slow, and the filtering efficiency of the material is greatly reduced. The filter in the epoxy resin processing system comprises a base, the top of the base is fixedly connected with a frame body, the inner side of the frame body is rotationally connected with a rotating pipe, and one side of the bottom of the base is fixedly connected with a driving motor through a bolt. According to the utility model, a rotary centrifugal filtration technology is adopted, and the bearing frame and the filter cylinder are driven to rotate through the rotating pipe, so that an epoxy resin material is more sufficiently stirred and dispersed in the filtration process, the material accumulation phenomenon is effectively avoided, and the filtration speed is obviously improved.

The invention discloses an efficient and environment-friendly metal plate laser cutting system, and relates to the technical field of metal plate laser cutting, the efficient and environment-friendly metal plate laser cutting system comprises a main body mechanism, the main body mechanism comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with a multi-directional moving mechanism and a positioning mechanism, and the output end of the multi-directional moving mechanism is fixedly connected with a laser cutting mechanism; according to the efficient and environment-friendly metal plate laser cutting system, by arranging the gas collecting unit, ozone generated in the process that a metal plate on the positioning mechanism is cut by the laser cutting mechanism, mist containing metal oxide particles and other impurity mist can be collected, and therefore follow-up purification of the impurity mist is facilitated; by arranging the filtering unit, the ozone collected by the gas collecting unit and impurity fog such as fog containing metal oxide particles can be filtered, and therefore the situation that the environment is polluted by the impurity fog such as the ozone and the fog containing the metal oxide particles generated in the laser cutting process of the metal plate is prevented.

The utility model provides an aquaculture sedimentation microfiltration device relates to aquaculture technical field, including microfiltration machine body, the top of microfiltration machine body is welded with support frame, the inboard of support frame is provided with sedimentation filter component, sedimentation filter component includes the processing jar of installation inboard of support frame, the inner wall upper side of processing jar is welded with connecting frame, the inboard of connecting frame is welded with installation ring frame, the inner wall of installation ring frame is opened with connecting groove, the inboard of installation ring frame is provided with filter cartridge, the bottom of processing jar is opened with water outlet, the water inlet of microfiltration machine body is connected with water outlet, through setting sedimentation filter component, through the filter cartridge middle section mesh, the impurity in water is filtered and intercepts, and the impurity under the connection will fall to the bottom of filter cartridge, when the impurity in filter cartridge accumulates too much, the operator can take out filter cartridge from installation ring frame through connecting top ring, and the convenience of replacing filter cartridge is increased.

The utility model relates to the technical field of sewage treatment, in particular to a novel environment-friendly sewage treatment device which comprises a treatment box, a processing mechanism, which is used for processing; according to the treatment mechanism, impurities in sewage are preliminarily filtered by using a filter cartridge, so that more impurities are prevented from falling on a second filter plate, a motor is started to drive a rotating rod to drive a cleaning plate to rotate, and the cleaning plate is beneficial to pushing the impurities retained in the filter cartridge to a discharge groove in the rotating process and falling into a collection box through a guide frame for collection; meanwhile, through interaction of the acting force of water flow falling on second filter plates and second springs, continuous vibration of the two second filter plates in the filtering process is facilitated, so that the impurities on the second filter plates can better flow towards lower positions of inclined planes of the second filter plates, and the filtering effect of the filter cylinders is guaranteed. The impurities are prevented from being gathered on the second filter plates, so that the filtering effect of the two second filter plates on the impurities in the sewage is improved.

This utility model discloses a high-efficiency waste heat recovery device for waste incineration, including an incinerator. The furnace wall of the incinerator has a cavity, and a spiral heat exchange tube is installed inside the cavity. An installation pipe is fixedly inserted into the top of the incinerator. The inner cavity of the installation pipe is equipped with a filter assembly for filtering fly ash in the high-temperature flue gas generated by the incinerator. A cap is threaded to the outer circumference of the top of the installation pipe. A connecting hose is inserted into one side of the top of the cap. The end of the connecting hose is sleeved on the input end of the spiral heat exchange tube. By setting up the filter assembly and installing a filter cylinder inside the installation pipe, the fly ash can be initially intercepted before the high-temperature flue gas enters the conveying pipe, preventing fly ash from directly adhering to the inner wall of the pipe. This prevents the inner diameter of the conveying pipe from shrinking and clogging from the source, and reduces the frequency of shutdown for ash cleaning.

The utility model discloses a water pump with a filtering structure, and relates to the technical field of water pumps. The water pump comprises a water pump body, the water inlet end of the water pump body is connected with a filtering mechanism, the filtering mechanism comprises a connecting pipe connected to the water inlet end of the water pump body, a partition cylinder is arranged in the connecting pipe, and a temporary storage area is formed between the outer side of the partition cylinder and the inner wall of the connecting pipe. After the water pump body is started, water flow is driven to enter the water pump body after being filtered by the filtering barrel, so that the damage degree of impurities in water to the water pump body is reduced, the water flow is filtered by the filtering barrel and then enters the dividing barrel, the impeller is driven to rotate, and the impeller drives the scraping strip to rotate through the transmission rod and scrapes the impurities filtered out of the outer side of the filtering barrel. Impurities are temporarily stored in the temporary storage area, continuous filtering of the filtering barrel is facilitated, the influence of the filtered impurities on the filtering barrel is reduced, and the filtering effect is improved by arranging the filtering barrel.

The invention discloses a drowning container emergency position indicating device and a rapid positioning tracking method thereof.The drowning container emergency position indicating device comprises a floating ball, a floating rope is arranged at the bottom of the floating ball, a strong magnet is arranged at the other end of the floating rope, a flash belt and a positioning device are arranged on the outer surface of the floating ball, and an opening and closing mechanism and a collecting mechanism are arranged in the floating ball; the opening and closing mechanism corresponds to the collecting mechanism, the bottom of the opening and closing mechanism is connected with a square frame, the interior of the square frame is connected with a filter frame, the interior of the filter frame is connected with a filter screen, one side of the filter frame is correspondingly provided with a vibration mechanism, one side of the filter screen is correspondingly provided with a scraping mechanism, and the vibration mechanism corresponds to the scraping mechanism. The floating ball and the floating rope are detachably connected, the floating rope and the strong magnet are detachably connected, the opening and closing mechanism comprises a first air cylinder, a frame is arranged in the floating ball, and the bottom of the frame is fixedly connected with an annular plate.

The utility model discloses a kind of environmental protection type rubber plasticizer production and processing device related to plasticizer production equipment technical field, vertical plate surface is located between the barrel of top plate and bottom plate, both ends of barrel are open structure, movable plate that barrel upper end opening is equipped with and barrel inner wall interference sealing cooperation, barrel upper portion is equipped with movable seal and is injected into raw material oil into barrel, movable plate, and filter plate for filtering raw material oil in barrel is equipped in barrel lower end opening, top plate lower portion is equipped with and is connected with movable plate, and is used to push movable plate and press raw material oil in barrel to exert force lifting drive mechanism;The utility model not only can effectively improve the filtering efficiency of high-viscosity raw material oil by heating filtering mode, but also can agitate and collect impurity particles during filtering process, greatly improve the filtering quality of raw material oil.

The utility model provides a kind of high efficient heat conduction stainless steel heat exchange tube, belong to heat exchange tube field, it is by heat exchange tube body, threaded pipe, connecting mechanism, filtering mechanism and rotating mechanism constitute, sealing ring and filter cartridge cooperation can improve sealing effect in the scheme, the setting of filter cartridge can filter heat exchange source, to remove the impurity in heat exchange source, prevent impurity from adhering on the inner wall of heat exchange tube body, affect the conduction of heat, the setting of heat exchange tube body is used to carry out heat exchange, the setting of threaded pipe can increase heat exchange area, to improve heat exchange efficiency, by sealing cover is connected on deslagging pipe, can seal deslagging pipe, sealing cover is convenient to detach simultaneously, filter cartridge is convenient to detach from deslagging pipe by sealing cover detachment separation, shaft rotation drives filter cartridge rotation, to adjust the filtration position of filter cartridge, ensure that filter cartridge can continuously filter.

The utility model relates to the technical field of cooling devices, and discloses a cooling device of a numerical control machine tool, which comprises a box body, a through hole is upwards formed in the box body, and a hollow support table is fixedly mounted at the through hole; a semicircular filter screen is fixedly mounted in the box body, and a rotary filter mechanism is rotationally arranged in the box body; a liquid outlet is formed in the bottom of one side of the box body, an extraction mechanism is communicated with the liquid outlet, and the extraction mechanism is in transmission with the rotary filtering mechanism when extracting liquid. According to the cooling device of the numerical control machine tool, the extraction mechanism is arranged to extract liquid so as to act on the rotary filtering mechanism for continuous filtering, waste chips are discharged, the blocking phenomenon is reduced, and continuous extraction and cooling are carried out for use.

The utility model relates to the technical field of numerical control lathes, and discloses a numerical control lathe with a cutting fluid filtering structure, which comprises a numerical control lathe main body, a base is fixedly arranged at the bottom end of the numerical control lathe main body, a water tank is fixedly arranged on one side of the base, and a main shaft is rotatably arranged in the water tank. A first driving assembly for driving the main shaft is arranged on the back face of the base, a plurality of supporting frames are fixedly arranged on the surface of the main shaft, filter screens are fixedly arranged on the surfaces of the supporting frames, and side plates are fixedly arranged at the two ends of the main shaft. The supporting frame and the side plates can be supported through the main shaft, the supporting frame can support the filter screens, the water outlet end of the cutting fluid backflow pipe and the main shaft are located on the same vertical plane, the two adjacent filter screens on the main shaft can receive waste chips after filtering the cutting fluid, the waste chips can be stored, and the waste chips can be prevented from falling off; and the main shaft is driven by the driving assembly I, so that the filter screen loaded with the scraps is inclined downwards.

The present invention discloses a high-efficiency filter device, which relates to the technical field of filters, and comprises a shell, wherein a diverter box is arranged inside the shell, rectangular grooves are arranged around the diverter box, a filter block body is sealed and slidably connected inside the rectangular groove, filter holes are opened on both sides and the outside of the filter block body, and a cleaning component for driving four groups of filter block bodies to move back and forth is arranged inside the diverter box, and the cleaning component is used to clean the filter holes of the filter block body. The high-efficiency filter device, through the linkage of components such as a first deflection shaft, a disc, a second deflection shaft, and a rotating disc, not only drives the reciprocating motion of the filter block body, but also realizes the self-rotation of related components through the meshing relationship between the gear and the gear ring. This self-rotation effect drives the reciprocating movement of components such as a movable rod and a sliding rod, thereby realizing the automatic piercing and cleaning of debris in the filter hole. This function effectively prevents the blockage of the filter hole and prolongs the service life of the filter block.

The invention belongs to the technical field of exosome processing, and discloses an exosome microvesicle lossless separation and purification device which comprises a sealed separation box, a central shaft assembly and a microvesicle separation device, the inner cavity of the sealed separation box is internally provided with a lamination assembly, the lamination assembly is arranged on the outer side of the central shaft assembly in a sleeving mode, and the top end of the lamination assembly is provided with a pressing disc in a matched mode; and a synchronous driving assembly. According to the invention, in a compression state, the micro-nano groove forms an accurate nanoscale channel for interception and filtration, and in a relaxed state, along with release of axial pressure, the elastic sheet rapidly rebounds, and the section geometric shape of the micro-nano groove deforms, such periodic geometric deformation destroys the mechanical stability of a filter cake layer from a physical level; according to the device, the clamping force is applied to the surface of the groove, so that particles which are originally clamped in the groove or adsorbed on the surface instantly lose the clamping force and automatically fall off along with the shearing action of surface fluid, the flux attenuation rate is controlled to be a small value when the device runs for a long time, and continuous and stable filtering in the true sense is achieved.

The invention discloses a filtering and decoloring device for squeezing primary camellia oleosa seed oil, and belongs to the technical field of camellia oleosa seed oil filtering and decoloring, the filtering and decoloring device comprises a device shell, the top of one side of the device shell is fixedly connected with an oil speed buffer pipe used for conveying grease into the device shell, and an oil inlet is formed in the oil speed buffer pipe; the oil inlet is fixedly connected with a valve for controlling opening and closing of the oil inlet, the end, away from the device shell, of the oil speed buffering pipe is fixedly connected with a pressure conveying connector, and the end, away from the oil speed buffering pipe, of the pressure conveying connector is fixedly connected with a press machine used for pressurizing the oil speed buffering pipe. Through cooperation of the activated carbon tube, the color filter column, the filter screen, the filter cloth tube, the filter screen, the color filter column and the activated carbon tube in the device shell, under the normal-temperature natural condition, impurity removal and decoloration of grease can be carried out, bioactive components and flavor active components of camellia oleifera seed oil are reserved, use of refining relieving is avoided, and the production cost is reduced. The loss of biological activity and flavor active ingredients of the camellia oleosa seed oil is reduced.

The invention discloses a shelter hospital negative pressure filtering device which comprises an air inlet assembly, a control assembly and an exhaust assembly, a fixing rod is arranged in a wall body, one side of the bottom end of the fixing rod is fixedly connected with a first support, and one side of the middle section of the wall body is fixedly connected with a second support. By arranging the air inlet assembly, air is filtered during air inlet so as to remove salt mist and impurity particles in the air, and impurities are collected in a scraping mode so as to guarantee the continuous filtering effect of the device; by arranging the control assembly, the negative pressure value in the square cabin can be freely adjusted to meet the use requirements of the device in different scenes, and then the application degree of the device is improved; the exhaust assembly is arranged and matched with the air inlet assembly to control the negative pressure environment of the shelter, meanwhile, exhausted air is disinfected, and the risk of pathogen diffusion is further reduced.