53 results about "Maintaining ventilation" patented technology

The invention relates to a factorization strain production method for hypsizygus marmoreus and a cultivation method for the hypsizygus marmoreus. The factorization strain production method for the hypsizygus marmoreus comprises inserting inclined plane stock culture into a flat plate to cultivate for 12-14 days at the temperature of 22 DEGC to 25 DEG C; then transferring flat plate strains into a shake flask filled with shake flask culture media to cultivate for 6-8 days at the temperature of 22 DEGC to 25 DEG C to obtain shake flask strains; then transferring the shake flask into a fermentation tank filled fermentation media, keeping temperature at 22 DEGC to 25 DEG C, maintaining ventilation pressure at 0.05-0.15MPa, and cultivating for 6-8 days to obtain fermentation tank liquid strains; inserting the fermentation tank liquid strains into a stock bottle filled with stock materials to cultivate for 35-40 days in dark to achieve stock, and picking and sterilizing to obtain factorization strains of the hypsizygus marmoreus. The factorization strain production method for the hypsizygus marmoreus has the advantages of being short in period and high in quality, can guarantee advantages of solid strains on mycelium stimulation mode of the hypsizygus marmoreus and hypsizygus marmoreus output quality and has good popularization value.

A disk drive has an internal breather filter that performs a filtration function while maintaining ventilation with an exterior of the drive. The filter circulates a gas between an interior and the exterior of its enclosure. The enclosure includes a first ventilation path for circulating the gas from the exterior to the filter, and a second ventilation path for circulating the gas from the filter to the exterior. In addition, a method of inspecting the filter and disk drive is disclosed. The method includes a compressing and decompressing step of compressing and decompressing the inside of the enclosure, a measuring step of measuring pressure in the enclosure, and a judging step of judging whether attachment of the filter is adequate on the basis of a value of the pressure measured.

The invention relates to a storing and fresh preserving method spinach, pertaining to the technical field of vegetable storage and fresh preservation. The method comprises the steps of: (1) harvesting the spinach that accords with the harvesting standard in time; (2) rapidly pre-cooling the spinach at the temperature of 4 to 7 DEG C; (3) dividing and packing the spinach into special freshness preservation packages and then tying package mouths tightly and putting into a refrigeratory at the temperature of minus 1 to 2 DEG C and with the humidity of 90 to 98 percent for 2 to 3 hours, then untying the package mouths; inserting empty tubes with the inside diameter of 30mm into the packages; tying the package mouths again for maintaining ventilation degree of the package mouths and automatically regulating the gas environment in the packages with 5 to 8 percent of CO2 and 8 to 12 percent of O2; (4) taking 5 to 7 days as a circle to proceed with the management of opening the package mouths for ventilation for 2 to 3 hours and inserting the empty tubes and tying the package mouths again until the storing is finished. The method of the invention has low cost, good storing effect and is simple and convenient for operation, and the spinach can still maintain good marketability after 25 days. The method can be widely introduced to vegetable growers, dealers or processing enterprises.

The invention relates to a slidable sun shade for an automobile skylight. The slidable sun shade comprises a sun shade body and two hook-shaped sliding rails. The sun shade body comprises a square shade body frame and a sun cloth arranged in the shade body frame. The sun cloth is provided with a plurality of air holes, sliding block parts extend outwards on the side edges of the two sides of the shade body frame respectively, the sliding rails are respectively correspondingly arranged on the two sides of the lower portion of a window, and the sliding block parts on the side edges of the two sides of the shade body frame are slidably placed in the sliding rails on the two sides respectively. Rear end parts of the sliding rails are of a sealed structure, the bottom surfaces of front end parts of the sliding rails are provided with notches, each notch is internally provided with a fixed column with an external thread, the fixed column is sleeved with a movable sleeve provided with an L-shaped abutting-against rod, and the front side of the fixed column is further in threaded connection with a locating nut. The sun shade for the automobile skylight can achieve the effect of sun shading and can maintain ventilation in an automobile and maintain fresh air in the automobile; the sun shade body can be dismantled conveniently to be cleaned or maintained, and mosquitoes or impurities can be prevented from entering the automobile through the window.

The invention discloses sticking cloth for medical treatment, which mainly comprises at least one support component, an isolation layer and two adhesive components, wherein the support component is a long strip body with plasticity, and can generate warping deformation by the external force, the isolation layer is a sheet body which can be combined with the support component, two adhesive components are respectively combined with both end parts of at least one of the support component and the isolation layer so as to position the isolation layer on the wound to cover the wound, and an appropriate distance can be maintained between the isolation layer and the wound by the support of the support component so as to avoid wound expansion caused by friction and maintain ventilation at the wound part.

A method for preventing the flame from running outward by use of ventilation plate used for electronic equipment features that a thermal expanding paint is coated at the positions of the ventilation holes on said ventilation plate. When a fire accident takes place in the electronic equipment and the flame will run outward via said ventilation holes, the coated thermal expanding paint is thermally expanded to close said ventilation holes.

The invention discloses a method for promoting advancing maturity of cherry. The method comprises the steps of planting cherry trees in a greenhouse, wherein the top of the greenhouse is provided with spraying pipes, and watering and foliage spraying of a fertilizer or medicine liquor are conducted as required; applying farmyard manure before the cherry sprouts, and watering and covering soil after fertilizer application; conducting hand-pollination on the cherry in a flowering phase; spraying mixed liquor of brassinolide and sulfate to cherry flowers in the cherry flowering phase, and spraying self-made disease-resistant growth-promoting liquor on flowers, leaves, and fruit of the cherry from the final stage of the flowering phase to a fruiting phase; spraying fruit setting liquor on the fruit from the fruiting phase to the period when the fruit maturation degree reaches 50-70%; letting in fresh air at day and covering the greenhouse and adopting temperature-rising operation according to needs at night from the period when the cherry sprouts to the fruit ripening period; preparing corresponding medicine liquor to kill pests from the period when the cherry sprouts to the fruit ripening period, and maintaining ventilation of the cherry greenhouse. According to the method for promoting advancing maturity of the cherry, the fruit setting rate of the cherry can be effectively increased, the ripening period of the cherry is advanced, and the fruit quality is good.

Disclosed are an apparatus, system, and method for endotracheal tube placement that allow for ventilation of the patient throughout the process of placing an endotracheal tube. The apparatus includes a T-shaped adaptor having a first lumen for coaxial connection to an artificial airway and a second lumen that intersects the first lumen for connection to a ventilator. A cap is provided over the distal end of the first lumen, the cap having an opening that may be closed with a flexible plug, blocking air from exiting through the first lumen when the second lumen is attached to a ventilator. The opening is sized to receive a fiber optic bronchoscope and to flexibly seal against the exterior of the fiber optic bronchoscope as it passes through the cap. A line of weakening extends from the opening to the perimeter of the cap, such that after the fiber optic bronchoscope has been advanced to the patient's trachea, the endotracheal tube may be advanced toward the cap, the cap may be split along the line of weakening to allow its removal from both the T-shaped adaptor and the fiber optic bronchoscope, and the endotracheal tube may be advanced over the fiber optic bronchoscope through the first lumen and the supraglottic airway without removal of the T-shaped adaptor, and thus while maintaining ventilation that is supplied through the second lumen of such T-shaped adaptor.

The invention relates to an easy-to-maintain ventilation type sound barrier. The sound barrier comprises a composite ventilation unit plate and a top end noise reduction plate arranged at the top endof the composite ventilation unit plate, the composite ventilation unit plate comprises a metal framework, a movable noise reduction plate, an embedded noise reduction plate and a transparent plate, and the movable noise reduction plate, the embedded noise reduction plate and the transparent plate are installed on the metal framework; shutter holes are formed in the surfaces, facing the sound source direction, of the movable noise reduction plate and the embedded noise reduction plate, and the surface, facing the sound source direction, of the top end noise reduction plate is subjected to galling treatment. According to the main principle of ventilation, a rotating shaft of the movable noise reduction plate is eccentrically arranged, unbalance loading can be generated under the action of cross wind, the noise reduction plate rotates around the shaft, when the wind area and weight of the noise reduction plate are fixed, the deflection angle of the noise reduction plate can be changed along with the change of the wind speed, a ventilation unloading channel can be opened to different degrees, and the purpose of ventilation unloading is achieved. In addition, both the movable noise reduction plate and the embedded noise reduction plate can be detached from the sound barrier, and the purpose of easy maintenance is achieved.

The invention belongs to the technical field of edible fungus production, and specifically relates to a method for cultivating wood ear. By using mother strain activating liquid containing antibiotics, antibiotics can inhibit the growth of bacteria under the condition of maintaining ventilation, but can not inhibit the growth of wood ear fungi, which can solve the problem that during an activationprocess of wood ear planting mother strains, the fungi can not be activated or the degree of activation is not enough to meet the requirement of inoculation due to bacterial contamination, the fruiting process can be completed within 10-15 days by using the temperature difference of 13-15 DEG C produced during the day and night and a light intensity of 2700-4000 Lx, compared with the traditional25-30 days, the fruiting time is saved, and the yield of the wood ear is higher, the cultivation bags are exposed in sun for 7-10 days after fruiting accelerating, the yellow water and mildly infectedmildew produced before fruiting accelerating due to temperature discomfort or excessive humidity can be sun-removed to prevent and control mildew from causing infectious infections, and the cultivation bags can grow new ears, thus improving the yield and quality of the wood ear.

The invention relates to a low-temperature preparation method of a super-hydrophobicity film surface, comprising the following steps: cleaning and actively processing a base material surface by ultraviolet light in humidity of 10 percent to 60 percent at the temperature of 10 DEG C to 25 DEG C; putting the activated base material in an atomized catalyst environment so as to adsorb the catalyst on the base material; and putting the base material which adsorbs the catalyst into a gasification or atomization state of a siloxane molecular compound with hydrophobic alkyl to react at the temperature of 10 DEG C to 80 DEG C. The base material surface treated by the low-temperature preparation method has good hydrophobicity, can reach above 100 DEG C generally and can reach 160 DEG C ultimately, a processing process has low temperature, different base material surfaces can achieve hydrophobization at lower temperature, the color of the treated base material surface is not obviously changed, and the treated fiber base material can maintain ventilation property. The low-temperature preparation method of a super-hydrophobicity film surface has simple operation and can be used for industrial continuous production.

The invention relates to the technical field of furniture, and discloses an intelligent wardrobe. The intelligent wardrobe comprises a wardrobe main body, a hinge and a lead wire. One side of the wardrobe main body is provided with an ironing board. A side plate is fixedly mounted on one side, close to the ironing board, of the side of the wardrobe main body. One side of the ironing board is provided with a folding rod. One end of the folding rod is disposed on an outer surface of one side of the side plate. The folding rod is movably connected with the side plate. A separator plate is fixedlymounted at an inner side of the wardrobe main body. An outer surface of the front end of the separator plate is provided with a humidity sensor. According to the intelligent wardrobe, the humidity change in the wardrobe can be automatically monitored through the humidity sensor, automatic early warning can be performed through cooperation of a loudspeaker, an LED light bar and the humidity sensorwhen the humidity exceeds the standard, a deodorizing cylinder can keep faint scent in the wardrobe, a ventilation heating device is adopted to maintain ventilation and automatic heating of the interior of the wardrobe, interior temperature of the wardrobe is maintained, and the user can iron the clothes conveniently through the ironing board.

The invention provides a violet pest control method, and different methods are adopted based on different pests, wherein, the damping-off control method comprises the following steps: (1) disinfect the seeds: dip the seeds in 40% formaldehyde 400 times liquid for 25 minutes or in 50 DEG C warm water for 10 minutes before plantation, and dry the seeds for plantation after disinfection; (2) soil disinfection: put 70% pentachloronitrobenzene 2k every Mu into proper amount of fine soil and apply the mixture to the land, then plant; and (3) eliminate the diseased and residual seeds. The downy mildew control method comprises the following steps: wipe out and diseased leaves; reduce invasion source; maintain ventilation and light transmission; at the disease stage: spray 50% phytophthora agent 500 times liquid; aphid control method comprises the following steps: spray 20% insecticidal esbiothrin 2000 times liquid or 40% oxidation rogor 400 times liquid. The violet pest control method in the invention can control insect disease effectively and help the violet grow for flowering stage smoothly.

The invention relates to a spliced changeable sunshade for an automobile skylight. The spliced changeable sunshade comprises a sunshade body which comprises a first sun shading body and a second sun shading body. The first sun shading body comprises a first shade frame and a sun shading cloth, wherein one edge of the first shade frame extends outwards to form an extending portion, and a clamping groove which is distributed in the longitudinal direction and provided with a longitudinal notch is embedded in the outer side face of the extending portion; the second sun shading body comprises a second shade frame and a sun shading cloth, and the sun shading cloth of the first sun shading body and the sun shading cloth of the second sun shading body are both provided with vent holes; one edge of the second shade frame also extends outwards to form an extending portion, the other edge of the second shade frame extends outwards to form a protrusion portion, the front end of the protrusion portion extends forwards to form a locating portion with an external thread, and a locating nut is connected to the locating portion in a threaded mode. The front end and the rear end of the first shade frame and the front end and the rear end of the second shade frame are each provided with a mounting seat with a threaded hole. The spliced changeable sunshade has the effects of shading sunlight and preventing mosquitoes from flying into or impurities from entering an automobile from the skylight, can maintain ventilation in the automobile, and is further suitable for automobile skylights of different lengths and high in adaptability.

The invention belongs to the field of automatic control devices, and particularly relates to an automatic window opening and closing device and a window. According to the automatic window opening and closing device, a rain sensor senses whether it rains, then a brake device supplies power to drive a transmission device to open or close the window. Through sensing of the rain sensor, an opening and closing control device does corresponding opening control or closing control. The brake device drives the transmission device to control the window body to be opened or closed. When it rains, the automatic window opening and closing device can automatically close the window, and prevents rain from entering in a house. When it does not rain, the automatic window opening and closing device can automatically open the window, maintains ventilation of indoor air, so that when people do not stay at home or are not convenient, the window can be timely opened or closed.

The invention discloses an anti-dust device suitable for a computer case. The anti-dust device comprises an exhaust fan, a dust exhaust chamber and a box body, wherein the box body mainly comprises a primary filtering plate, an upper fixed plate, a tertiary filtering plate and a lower fixed plate which are sequentially connected end to end; through holes in an M*N rectangular array are formed in the primary filtering plate and the tertiary filtering plate; a filter screen is mounted in each through hole; the dust exhaust chamber is arranged under the box body, and the lower fixed plate serves as the top of the dust exhaust chamber; the exhaust fan is mounted on one side of the dust exhaust chamber; two or more vents are formed in the lower fixed plate; and M and N are integers equal to or more than 2. As a dust prevention component on the computer case, the anti-dust device adopting the structure can maintain ventilation in the case to facilitate heat dissipation of all hardware in the case on the one hand, and on the other hand, can extract and discharge dust in the case in time, effectively reduces failures caused by the reason that dust is attached onto the hardware of a computer, and has the characteristics of simple structure and remarkable dust prevention effect.

The invention relates to a window, in particular to a soundproof window which not only maintains ventilation, but also insulates sound. The soundproof window comprises a front glass sheet and a rear glass sheet, wherein the front glass sheet and the rear glass sheet are fixed in a frame at certain spacing, and the front glass sheet and the rear glass sheet are provided with a plurality of small holes. The spacing of adjacent surfaces of the front glass sheet and the rear glass sheet is less than or equal to 5 centimeters. The aperture of each small hole on the front glass sheet and the rear glass sheet is less than or equal to 1 centimeter. The hole pitch between small holes on the front glass sheet and the rear glass sheet is less than or equal to 5 centimeters. The soundproof window can not only effectively isolate the outside noise, but also ensure the flow of outside air and indoor air, and the freshness of the indoor air.

The invention relates to a roadbed ventilation prefabricated component in a flexible splicing form, which comprises a concrete ventilation component, the concrete ventilation component is a hollow cube, ventilation holes are formed in the front, rear, left and right sides of the concrete ventilation component, and the ventilation holes are communicated with a middle cavity to form longitudinal andtransverse channels; a rubber outer wrapping layer is arranged outside the concrete ventilation component, and round holes are formed in the four faces. A plurality of concrete ventilation componentsare laid in the same plane, prestressed steel wire grouting ducts correspond to one another, and prestressed steel wires for connection are inserted to achieve longitudinal and transverse connection.The single prefabricated ventilation components are connected to form the longitudinally and transversely communicated overhead ventilation layer, and the prefabricated components are connected in aflexible buffer manner, so that the ventilation structure can adapt to uneven freeze-thaw deformation in permafrost regions, and ventilation ducts are kept unblocked.

The invention discloses a technical method of directional decomposition and directional recombination of biological elements, which solves the technical problem for manually decomposing and recombining a carcass directionally. The environment is protected. The method comprises the steps of 1, dissecting and cleaning the carcass; 2, putting the carcass to hot water at 100 degrees centigrade to sterilize for 3 hours; 3, warming the sterilized carcass to 80 degrees centigrade from 10 degrees centigrade / min, drying the carcass for 10-12 hours at 80 degrees centigrade; 4, crushing the carcass to be 100-120 meshes at 3000-3380 rpm of rotation speed, obtaining the carcass powder; 5, collecting the carcass powder, storing the carcass powder in a glass container without cover; 6, putting the glass container to the room, maintaining ventilation, biologically decomposing the carcass powder at room temperature for 36 months; 7, spreading plant seeds to the biological fertilizer decomposed by the carcass powder; putting the glass container to the greenhouse, and performing management according to the greenhouse vegetable plants.

The invention relates to a sliding type sunshade for an automobile skylight. The sliding type sunshade comprises a sunshade body and two hooked sliding rails. The sunshade body comprises a square shade frame and a sun shading cloth arranged in the shade frame. The sun shading cloth is provided with a plurality of vent holes. Sliding block portions extend outwards from the two side edges of the shade frame respectively, the sliding rails are correspondingly arranged on the two sides of the lower portion of a window respectively, and the sliding block portions on the two side edges of the shade frame are arranged in the sliding rails on the two sides respectively in a sliding mode; the rear end of each sliding rail is of a sealed structure, the bottom face of the front end of each sliding rail is provided with a notch, and a fixing column with an external thread is arranged in each notch; each fixing column is sleeved with a moving sleeve which is provided with an L-shaped abutting rod, and a locating nut is further connected to the front side of each fixing column in a threaded mode. The sliding type sunshade for the automobile skylight can play a role of sun shading, maintain ventilation in an automobile and keep air in the automobile fresh; the sunshade body can be conveniently dismounted to be cleaned or repaired, and mosquitoes can be prevented from flying into the automobile from the skylight, or impurities can be prevented from falling into the automobile from the skylight.

The invention relates to a preparation process of ropivacaine mesoporous-bioactive-glass composite microspheres. The preparation process comprises the following steps: (1) preparation of a SiO2 colloidal crystal template; (2) preparation of a reverse colloidal crystal template; (3) preparation of MBGs; (4) loading of drugs in the MBGs; (5) preparation of composite microspheres. The step (5) comprises the specific steps: firstly dispersing the MBGs and drug-loaded-MBGs powder to be uniform, flatly laying on a flat and clean plane with enough strength, then pressing another flat and clean surface with enough hardness on the MBGs and the drug-loaded-MBGs powder to carry out pressing, adjusting pressing pressure well, then dropwise adding chloroform solution of PEG and PLA-PEG around the MBGsand the drug-loaded-MBGs powder, wetting and maintaining ventilation under normal temperature till chloroform is completely volatilized.

The invention relates to a medical device, especially a plugging device for fixing in the nasal cavity, correcting the nasal septum and maintaining the ventilation of the nasal cavity. It is composed of a tubular frame and a soft material layer arranged on the outside. The supporting ribs are provided with grooves at the end of one side of the supporting ribs, and the supporting ribs on the other side can abut against the grooves. It is characterized by simple structure and convenient use. It can not only maintain the ventilation of the nasal cavity after the operation and relieve the pain of the patient, but also fix and correct the nasal septum more effectively, which is beneficial to the recovery and re-examination after the operation of the nasal cavity.

The invention provides an automatic control drying and ventilation system for maintaining grain depots, which relates to the field of grain storage. The automatically controlled drying and ventilation system for maintaining the grain depot includes a grain depot, two sets of support frames are respectively fixedly connected to the top of the inner wall of the grain depot, and the number of each set of support frames is two, and each set of support frames is far away from the top of the inner wall of the grain depot. One end of each is fixedly connected with a fixing plate, and the bottom of the fixing plate is symmetrically fixedly connected with a lamp holder. The automatically controlled drying and ventilation system for grain depots has a simple structure and is easy to use. It can transmit the humidity information of the grain in real time through the humidity sensor, and compare the set humidity through the data comparison module. If the set humidity is reached, the controller will Send work instructions to the drying lamp to heat the grain depot, and start the motor to extract the steam that appears after heating, so as to achieve automatic and continuous drying of the grain depot, avoiding the problem of excessive humidity and waste of grain .

The invention discloses an ecotype turkey brooding house. A house body is of a double-layer structure, light-transparent in the north direction and the south direction and mainly composed of solid walls, movable walls and an asbestos shingle roof. Compared with the prior art, the ecotype turkey brooding house has the advantages that the ecotype turkey brooding house is built in a rectangular pit at a high altitude, convenient to manage and capable of maintaining ventilation while effective warm keeping is achieved; when the temperature in the house is insufficient, the temperature in the house can be increased through water pipe sets on the inner walls of the solid walls, and it is guaranteed that turkey can be naturally hatched in winter at a low temperature; awnless brome and sweet clover are sowed outside the house in a mixed mode, and grass nutrition except for feed can be provided for turkey hens for a long time; the ecotype turkey brooding house is convenient to build and easy to popularize.

The invention relates to the technical filed of mine drilling, in particular to a ventilating method for air pressure maintaining for drilling in mine rescue and ventilating equipment for air pressure maintaining for drilling in mine rescue. The ventilating method comprises the steps that a surface drilling position corresponding to an underground mine is confirmed; drilling operation is conducted at the drilling position, an operating well is drilled out, and an orifice pipe is poured at the circumferential well wall of the operating well; drilling is conducted at the bottom of the operating well by adjusting diameter, and a drill stem is stretched into the mine; a circulating pipeline inside the drill stem is cut off; air circulating outside the drill stem is cut off; ventilating is conducted; air is supplied into the mine through the circulating pipeline through a draught fan, when the air pressure inside the mine exceeds a preset air pressure threshold value, an over-pressure component penetrating through a swelling capsule is opened, and the air is exhausted to the ground surface. The ventilating equipment for air pressure maintaining for drilling in mine rescue can realize the method. The ventilating method and equipment for air pressure maintaining for drilling in mine rescue solve the problem that living space of a trapped person shrinks or disappears due to the decompression of the mine when a drillhole gets through the underground mine.

A method for maintaining ventilation during an oxygen flush in an anaesthetic breathing apparatus (2) is disclosed. The breathing apparatus (2) comprises a breathing circuit (3), a fresh gas section (5), and a ventilator section (7). The fresh gas section (5) comprises an oxygen supply (12), and the ventilator section (7) comprises an expiratory pressure control valve (21). The method (100) comprises steps of: starting a continuous flow of oxygen from the oxygen supply (12) into the breathing circuit (3) interrupting an ongoing ventilation in order to activate the oxygen flush; maintaining thecontinuous flow of oxygen;, and cycling the expiratory pressure control valve (21) between an upper pressure level setting to provide an inspiratory phase of a breathing cycle and a lower pressure level setting to provide an expiratory phase of the breathing cycle.

The invention discloses a gourd bee breeding device, which comprises a cover, a sealing layer and a box body, a movable tube is connected to the lower end of the cover, and a straight tube is installed at the lower end of the movable tube, and a switch is installed on the box body and a louver, and the lower end of the switch is provided with a louver, and the end of the box body is fixed with a bottom post. The gourd bee breeding device adopts shutters on the device body, which is convenient for ventilation of the whole device, and is beneficial to the survival and breeding of gourd bees, and adopts a honeycomb group inside the device body, which is convenient for gourd bees to have a rest place , which is beneficial to breeding, the feeding trough is arranged at the bottom of the device body, which is beneficial to the normal foraging of gourd bees and the cultivation of gourd bees. The use of the device causes dampness, which affects the cultivation of the gourd bee, and also enables the device to be kept ventilated and dry, which is beneficial to prolong the life of the gourd bee.

The invention relates to a weatherproof (waterproof) and ventilated structure. The structure has the advantages that under the severe weather of wind and rain, or in a spraying environment, the protected surface or the protected interior of the structure cannot be affected by rain (water), the function of keeping ventilated can be achieved, through the adoption of the structure, the ventilation between the protected surface or the protected interior of the structure can be effectively ensured, and meanwhile, and the phenomena that the protected surface or the protected interior of the structure is directly wet by the external wind and rain or spraying, and therefore the dryness degree of the protected surface or the protected interior of the structure can be ensured.

The invention aims to provide a turnover water-inflow-preventing ventilator device which is compact in structure, good in ventilation quality and capable of meeting the ventilation requirement duringnormal operation, automatically closes for water prevention during turnover and automatically keeping ventilation after turnover is recovered. The turnover water-inflow-preventing ventilator device comprises an air duct and a protection assembly, the bottom of the air duct communicates with a cabin, the protection assembly is arranged at one end of the air duct, a check valve is arranged between the air duct and the protection assembly, and a gravity valve disc matched with the check valve is hinged to the end, close to the protection assembly, of the check valve; a sealing washer is arrangedbetween the gravity valve disc and the check valve, an opening is formed in the bottom of the protection assembly, and the cross section of the opening is parallel to the horizontal plane. The invention is applied to the technical field of ventilator waterproof structures.