140results about How to "Improve air intake efficiency" patented technology

The invention relates to a smoke purifier, and belongs to the field of purification. A smoke dust purifier comprises a shell assembly, and the shell assembly is provided with an air inlet, a containing cavity, an air draft cavity and an air outlet; the filtering assembly is arranged on the shell assembly and located in the containing cavity, and the filtering assembly is provided with a filtering air inlet and a filtering cavity; the air inlet assembly is arranged on the shell assembly, the air inlet assembly is provided with an air inlet channel, and the air inlet channel, the air inlet, the filtering air inlet, the filtering cavity, the air draft cavity and the air outlet are sequentially communicated; the fan assembly is arranged on the shell assembly and located in the air draft cavity; the display assembly is arranged on the shell assembly; the electric control assembly is arranged on the shell assembly, and the electric control assembly is electrically connected with the filtering assembly and the display assembly. The invention discloses a smoke dust purifier which is used for absorbing fine smoke dust generated in a working environment and reducing the risk that workers are exposed in a harmful dust environment.

The invention relates to the technical field of flue gas purification, in particular to flue gas desulfurization, denitrification and dust removal separation equipment which comprises a separation mechanism, a laminar flow reactor, a mixed flow impeller and a desulfurization reactor. The separation mechanism is connected with the air inlet pipeline; the laminar flow reactor is connected with the separation mechanism; the mixed flow impeller is connected between the separation mechanism and the laminar flow reactor; the desulfurization reactor is connected with the laminar flow reactor; oily particles are preliminarily separated through centrifugal force, after flue gas internally rotates and ascends, a secondary filter screen is driven by the ascending force of the flue gas to shake at high frequency to secondarily filter the oily particles, meanwhile, the oily particles are separated again through the internal rotation force of the flue gas, and the flue gas and ammonia gas are fully mixed and pre-distributed through a mixed flow impeller, so that the denitration efficiency is improved; the problems that the catalyst is damaged due to the fact that oily particles in flue gas cannot be effectively filtered, and the denitration efficiency is reduced due to non-uniform distribution when the flue gas reaches a fluidized bed are solved.

The invention relates to a lift structure for an aerostat and a buoyancy adjusting method, and the structure realizes dynamic adjustment of lift and optimization of flight performance by combining a light gas storage chamber, a middle buffer chamber and an annular wing. The lift force structure comprises a floating main body, an annular wing, an air storage chamber, a middle buffer chamber and a control system, and further comprises an air filling unit and a pressure adjusting unit. The inner surface of the floating body defines a first air duct, and the annular wing and the floating body are spaced to form a second air duct. And the gas storage chamber and the middle buffer chamber are inflated and subjected to pressure regulation through the gas filling unit and the pressure regulation unit. The control system monitors the state of the aerostat in real time through the sensor array and adjusts the pressure of the air storage chamber and the middle buffer chamber and the absolute angle of attack of the annular wing through feedback control logic, so that dynamic adjustment of lift force and optimization of flight performance are achieved.

The invention relates to a thermal management system, a control method and a vehicle. The tuyere lower enclosure structure is arranged below the tuyere upper enclosure structure at intervals, so that an air inlet is formed between the tuyere upper enclosure structure and the tuyere lower enclosure structure; the active air-inlet grille is connected between the tuyere upper surrounding structure and the tuyere lower surrounding structure, and the active air-inlet grille comprises rotatable blades; the tuyere lower surrounding structure comprises an air inlet front edge located in front of the active air inlet grille. On the section perpendicular to the width direction of the vehicle, the air inlet front edge comprises an arc-shaped section, the arc-shaped section gradually rises from front to back, and an included angle alpha is formed between the blades and the advancing direction of the vehicle and is larger than or equal to 90 degrees and smaller than or equal to 175 degrees. According to the heat management system, under the synergistic effect of arc-shaped design of the air inlet front edge and control over the included angle between the blades and the advancing direction of the vehicle, the air inlet efficiency of the air inlet is improved, the heat interaction efficiency between the vehicle and the environment is improved, and then the heat dissipation capacity of the vehicle in the high-temperature environment is improved.

The utility model provides a passenger car side wall air inlet box structure, and belongs to the technical field of passenger car rear engine air inflow. The passenger car side wall air inlet box structure is characterized in that an air inlet grid and an air inlet box are installed at an air inlet of a car body, and the non-waterproof air inlet grid is adopted, so that the air inlet grid does not have the waterproof function any more, the air inlet resistance is reduced, and the air inlet efficiency of the air inlet is improved; the flow guide plate is arranged at the air inlet in the air inlet box, the flow guide channel is formed between the flow guide plate and the air inlet box, on one hand, inlet air can be guided through the flow guide plate, the loss of air inlet efficiency is reduced, on the other hand, the flow guide plate can block straight-through rainwater, a large amount of rainwater is prevented from directly entering an engine system from the air outlet, and the service life of the engine system is prolonged. The waterproof capacity of the air inlet box is improved, the waterproof efficiency of the air inlet box is improved on the premise that the air inlet efficiency is not lost, and therefore the air inlet box structure can meet the requirements of a passenger car engine for the air inlet efficiency and the waterproof effect at the same time in the small air inlet and engine compartment space.

The invention discloses air particulate matter concentration detection equipment, and relates to the technical field of air detection.The air particulate matter concentration detection equipment comprises a main body and an air inlet pipe, a support is installed in a connector of the air inlet pipe and the main body, a second motor is installed in the middle of the support, and blades are installed on an operating shaft of the second motor; the device has the advantages that the first motor of the flow guide assembly drives the rotating frame to rotate, the angle of the flow guide plate can be adjusted to guide air into the air inlet, the air inflow is increased, it is ensured that an air sample is fully obtained in time, mounting and dismounting are convenient, the flow guide assembly can be easily taken down when equipment is transferred, and meanwhile the position of the air inlet pipe can be adjusted by screwing a rotating wheel; the main body is rotationally placed on the placing frame behind the main body, so that the vertical occupied area is reduced, obstruction is avoided when the equipment is moved, the main body can be fixed on the bearing frame through the mounting frame, the sliding block, the clamping block and the like during mounting, different mounting scenes are adapted, the mounting efficiency is improved, the operation stability is ensured, and the equipment universality is improved.

The invention relates to the technical field of air conditioners, in particular to a cross-flow air conditioner which comprises a machine shell, a cross-flow fan and an evaporator. An air inlet is formed in the middle of the front face of the machine shell, and an air outlet is formed in the left side and / or the right side of the front face of the machine shell. An air duct is arranged in the machine shell and used for distributing airflow entering from the air inlet to the air outlet; the cross-flow fan is arranged on the left side and / or the right side of the machine shell and is close to the air outlet. The cross-flow fan provides driving force for airflow to enter the machine shell from the air inlet and then flow out of the air outlet. The evaporator is arranged in the machine shell and close to the air inlet, and the evaporator is used for conducting temperature exchange on airflow flowing through the air channel. The air inlet and the air outlet are formed in the front face of the air conditioner, the back of the air conditioner can be directly attached to a wall or integrated with the wall, it can be guaranteed that the air inlet and the air outlet are not blocked, and smooth airflow circulation is guaranteed; the air inlet resistance is obviously reduced, and the air inlet efficiency is improved.

The utility model discloses a kind of shell assembly and bladeless fan, it includes: cover and connecting structure, the bottom of inner shell is provided with support seat, the side of inner shell is provided with first air inlet;Inner shell is provided with first installation structure, and first installation structure is used to connect inner shell and lamp body;The side of cover is provided with second air inlet, cover is provided with second installation structure for connecting dust screen;The top of inner shell and the top of cover are connected relatively by connecting structure, and there is gap between the side of inner shell and the side of cover.Air is provided with additional flow path in gap, avoid air in the process of air intake excessive crowded or form vortex, ensure that air can smoothly enter fan inside, improve air intake efficiency.In addition, gap design makes the connection between inner shell and cover more flexible, help to absorb certain vibration and expansion, thereby reduce the possibility of dust cover drop, thereby further enhance the durability and service life of product.

The invention discloses a low-temperature multi-effect evaporation, concentration and crystallization device for treating high-salt-content and high-phenol-content wastewater, and relates to the technical field of evaporation and crystallization, the low-temperature multi-effect evaporation, concentration and crystallization device comprises a first evaporator assembly comprising a second outer shell and an inner shell, an inner cavity of the second outer shell is fixedly connected with the outer surface of the inner shell, and a partition plate is fixedly connected to the lower portion of the inner cavity of the second outer shell; the middle of the inner shell is rotationally connected with a threaded rod, the upper portion and the lower portion of the threaded rod are symmetrically and rotationally connected with first cleaning assemblies, the middle of the threaded rod is in threaded connection with a third scraper, and a rotating assembly is arranged at the upper end of the inner shell. A third scraping plate is in threaded connection with the middle of the threaded rod, so that when the threaded rod rotates, the third scraping plate can be driven to ascend and descend in the inner cavity of the inner shell, then crystals in the middle of the inner cavity of the inner shell can be cleaned, and accumulation of crystal substances in the inner cavity of the inner shell can be reduced; the influence of crystallization on the heat exchange efficiency between steam and feed liquid and the influence on the evaporation rate can be reduced or even avoided, and excessive accumulation of crystals can be avoided.

The utility model discloses a heat exchanger in an air pressure brake circuit, and aims to provide a heat exchanger in an air pressure brake circuit, which is convenient to install, reduces the temperature of compressed air in a dryer, improves the ventilation and exhaust air volume, and saves energy consumption. The vehicle-mounted air conditioning system comprises an in-vehicle air guide cavity, an out-vehicle air guide cavity and an air compressor, a heat exchanger is arranged between the in-vehicle air guide cavity and the out-vehicle air guide cavity, and the heat exchanger comprises a plurality of air pipes which are transversely arranged and a plurality of heat dissipation plates which are longitudinally arranged. The heat exchanger further comprises cooling fans corresponding to the multiple cooling plates, an air inlet and an air outlet, the air inlet and the air outlet are connected with the two ends of the multiple air pipes, airflow among the multiple cooling plates communicates with the in-vehicle air guide cavity and the out-vehicle air guide cavity, and the output end of the air compressor is connected with the air inlet through a copper pipe A; the air outlet is connected with the input end of an external dryer through a copper pipe B; the utility model is applied to the technical field of vehicle air braking.

This utility model belongs to the technical field of mufflers, and relates to an irregularly shaped muffler for large-displacement motorcycles. It includes a flat muffler cylinder, within which a muffler assembly is disposed, connecting an intake chamber and an exhaust chamber. The muffler cylinder is connected to the engine's exhaust port via the exhaust assembly. The exhaust chamber is connected to the outside via a first tailpipe and a second tailpipe arranged side-by-side along its long side. The intake chamber and the exhaust assembly are connected via a conical connector. The cross-sectional area of ​​the conical connector gradually decreases from the muffler cylinder towards the exhaust assembly. The exhaust assembly includes a rear connecting pipe, a catalytic sleeve, a first exhaust pipe, and a second exhaust pipe. The first and second exhaust pipes are respectively connected to the two exhaust ports of a motorcycle's twin-cylinder engine. The irregularly shaped muffler for large-displacement motorcycles provided by this utility model has higher exhaust efficiency and can better meet the emission requirements of large-displacement motorcycles.

The engine starter cover comprises a cover body with one side open, the cover body covers a pull disc cover, and an air inlet channel is arranged between the open side of the cover body and the pull disc cover. The utility model further discloses an engine using the engine starter cover body. The pull disc cover is covered with the pull disc cover, normal air inlet can be guaranteed, meanwhile, the rainproof and dustproof effects can be achieved, and the pull disc cover has high practicability.

This invention belongs to the field of accessories for aero-engine starting subsystems and discloses an airflow filtering device for a starting air valve. The device includes a leading edge, a main body, and a particle separation section. Airflow passes through the conical leading edge and flows rearward along both sides of the main body. The particle separation section is located at the rear of the main body. In this section, an aerodynamic configuration separates the air from the particles within it. The particle separation section has an airflow inlet that communicates with the interior of the main body, and the air inlet direction of the particle separation section faces rearward. This airflow filtering device has a simple structure, is easy to install, and requires less frequent replacement, thus reducing manufacturing costs. Furthermore, this airflow filtering device effectively prevents wear and contamination of the starting air valve components by particles in the airflow, which helps improve the lifespan and reliability of the starting air valve.

The utility model belongs to the technical field of kitchen appliances, and discloses a cooking utensil which comprises an outer cover, a heat preservation cover arranged in the outer cover, a circuit board and a cooling fan, the circuit board and the cooling fan are arranged between the outer cover and the heat preservation cover, an air inlet corresponding to the cooling fan is formed in the side portion of the outer cover, the heat preservation cover is provided with an air outlet, and the circuit board is provided with a heat dissipation piece. An air guide part is further arranged between the outer cover and the heat preservation cover, and the air guide part is provided with a first cooling air duct communicating the cooling fan and the heat dissipation part and a second cooling air duct communicating the cooling fan and the air outlet. Therefore, the number of required cooling fans is reduced, the production cost of the cooking utensil is reduced, meanwhile, due to the fact that the number of the cooling fans is reduced, the energy consumption of the cooking utensil is reduced, the use cost of a user is reduced, noise generated when the cooking utensil works is reduced, and the use experience of the user is improved.

The flow detection device comprises a shell, an airflow channel is arranged in the shell, and an air resistance structure is arranged in the airflow channel so that the airflow channel can be divided into an air inlet section located on one side of the air resistance structure and an air outlet section located on the other side of the air resistance structure. The air resistance structure is at least provided with a ventilation grid part in the middle area of the airflow channel, the shell is provided with a detection opening corresponding to the air inlet section and provided with a detection pipe extending into the air outlet section corresponding to the air outlet section, and the tail end of the detection pipe extends to the ventilation grid part to detect airflow passing through the ventilation grid part. The ventilation grating part is separated to form a plurality of airflow passing ports arranged in an array mode, airflow can be divided into a plurality of strands to pass through when passing through, the stability of the flow state of the airflow can be guaranteed, and the airflow can pass through the detection pipe in the air outlet section in a laminar flow state. The detection pipe can cross a viscous area close to the channel wall to directly detect the airflow in the central area of the airflow channel.

The application discloses a motorcycle, which comprises a frame, a body cover, a walking assembly and a power assembly. The walking assembly comprises a rear wheel, and the power assembly comprises an engine, an air filter and an air inlet pipe. The air inlet pipe comprises a left air inlet pipe and a right air inlet pipe which are distributed along the width direction of the motorcycle. The left air inlet pipe comprises a left air inlet part which extends along the length direction of the motorcycle. The right air inlet pipe comprises a right air inlet part which extends along the length direction of the motorcycle. In the height direction of the motorcycle, a horizontal plane perpendicular to the height direction of the motorcycle is defined. The projection of the left air inlet part on the horizontal plane extends along a first straight line, and the projection of the right air inlet part on the horizontal plane extends along a second straight line. The included angle between the first straight line and the second straight line ranges from 14° to 22°. Through the above arrangement, the air intake efficiency of the air inlet pipe can be improved.

The utility model discloses a filter screen and an integrated cooker, and belongs to the technical field of cooking equipment. The filter screen comprises a filter screen body, the filter screen body is sunken towards the inner side of the smoke inlet, and the cross section of the filter screen body is of an asymmetric V-shaped structure. According to the structure, the contact area of oil fume and the filter screen body is increased, so that the air inlet resistance is reduced, the air inlet efficiency is improved, the grease capturing capacity of the filter screen is improved by increasing the probability that grease in the oil fume collides with the filter screen, the grease separation effect of the filter screen is improved, and the structural strength of the V-shaped structure is better; the lengths of the two edges of the filter screen body are different through the asymmetric V-shaped structure, the filter screen can be flush with the upper surface of the exhaust fume collecting hood after being installed through the design of the long edges and the short edges, and therefore the appearance is more regular and attractive. Three mounting seats are arranged at a smoke inlet of the integrated cooker at intervals and used for mounting and supporting a filter screen. By adopting the mounting mode, the air inlet sectional area can be obviously increased, so that the air inlet efficiency is improved.

This invention proposes a large-scale, shallow, circular silo-type self-regulating pressure system, comprising a silo body. Its key feature is the inclusion of an elastic device that can contract or expand under pressure. This elastic device is located at the top of the silo body and is connected to an air inlet pipe. The end of the air inlet pipe extends out of the silo body and is connected to an exhaust pipe and an intake pipe, respectively. The exhaust pipe is equipped with a one-way exhaust valve, and the intake pipe is equipped with a one-way intake valve. The end of the intake pipe is connected to a high-pressure gas source, providing gas at a temperature of 15 to 25°C. This invention effectively balances the pressure inside and outside the silo while also considering temperature-controlled grain storage processes, preventing overheating inside the silo while balancing the pressure difference. Furthermore, it is easy to install and can be retracted when not in use to reduce space occupancy within the silo.

The utility model discloses a mold ejection structure. A lower mold is connected to the top of a base, an upper mold is connected to the top of the lower mold, an ejection rod is arranged at the bottom of the base in a sliding mode, a fixing plate is connected to the interior of the base, and an ejector pin is fixed between the fixing plate and the upper mold. According to the mold ejection structure, when the base moves downwards, the lower mold can be driven to move downwards, air in the air bag can be exhausted, and chippings in the lower mold groove can be cleaned out through the through groove when the air is exhausted, so that the product quality and the use efficiency of the mold are improved; when the collecting box is positioned, an internal notch can be attached to the side face of a penetrating groove, chippings cleaned by the cleaning mechanism can fall into the collecting box through the penetrating groove to be collected, the cleaning effect on the lower die can be further improved, finally, the product ejection position can be improved through threaded sliding of a threaded ring and a threaded rod and extension of the length of an ejection rod, and the product quality is improved. And the product demolding effect is improved.

The utility model discloses an air-cooled cylinder head, which comprises a cylinder head main body, the cylinder head main body is provided with an air inlet channel and an exhaust channel, and the air-cooled cylinder head is characterized in that a transverse air channel and a vertical air channel which penetrate through the cylinder head main body are arranged on the cylinder head main body, and the transverse air channel and the vertical air channel are of a cross-shaped structure. The cylinder head has the beneficial effects that the air inlet and exhaust efficiency of the cylinder head is improved, and air inlet and exhaust of the cylinder head are prevented from being blocked. Meanwhile, heat dissipation is conducted on all parts of the cylinder head from different directions, the heat dissipation area of the cylinder head is enlarged, the heat dissipation effect is improved, and the heat dissipation efficiency is improved.

The invention relates to the technical field of energy-saving building material production equipment, and particularly discloses a waste gas collection and utilization device for steam-cured aerated concrete blocks, which comprises a waste gas inlet bin, a transition gas channel, a waste residue collection shell bin and a main conveying cylinder which are sequentially arranged from bottom to top, a residue guide channel, a waste gas outlet channel, a waste gas outlet channel and a waste gas outlet channel, the slag guide channel is fixedly arranged at the top end of the transition air channel and arranged on the inner side of the main conveying cylinder, the pneumatic turbofan can obtain power and rotate under the driving of waste gas through the arrangement of the inner wall dust scraping plate, and the rotation of the pneumatic turbofan drives the inner wall dust scraping plate to move in a mode of being attached to the inner wall of the main conveying cylinder. And ash on the inner wall of the main conveying cylinder is scraped off, the ash becomes ash slag after scraping off, the ash slag falls to the outer sides of the slag sliding part and the slag guiding part and slides into the slag falling chamber to be collected, and therefore the circulation efficiency of waste gas is improved.

The utility model discloses a vehicle-loaded road air purification device and an air purification vehicle based on the vehicle-loaded road air purification device, the air purification device is installed at the bottom of the vehicle and comprises a purification box, one end of the purification box is provided with an air inlet system, and the other end of the purification box is provided with an air outlet system; the purification box and a chassis of the vehicle are detachably arranged; the air inlet system is arranged close to an air inlet grille of the vehicle; the air inlet system comprises a first air inlet assembly communicating with the purifying box and two second air inlet assemblies symmetrically arranged on the two sides of the first air inlet assembly. The first air inlet assembly is further provided with an air inlet grid in a communicating mode, and the two ends of the air inlet grid abut against the second air inlet assembly. According to the gas inlet system, a wide and efficient gas inlet area is formed through the synergistic effect of the first gas inlet assembly, the second gas inlet assembly and the gas inlet grid, the capture and enrichment requirements of pollution gas are fully considered in the design of the gas inlet system, and the gas enrichment efficiency is high.

This invention belongs to the field of generator sets, specifically a containerized diesel generator set and a method for quieting the generator set, including an electric generator set; the quiet containerized data center diesel generator set also includes a first compartment and a second compartment; the first compartment has a connected generator compartment, an air intake compartment and an exhaust compartment, the electric generator set is fixedly installed in the generator compartment, and a cooling fan is fixedly installed in the exhaust compartment; the second compartment has a heat dissipation compartment and a flue gas treatment compartment; relying on the above-mentioned modular stacked design, it can be prefabricated in the factory in advance, with a short construction period, convenient combination and use, and at the same time, the overall structure is compact, the whole system occupies only about 50 square meters, which greatly saves the machine room space, saves construction costs, and realizes the stacked arrangement of high-power kVA 5-15kVA units and their auxiliary components, saving space and pipeline length.

The invention relates to the technical field of material transportation, in particular to a high-speed transportation line for a quick freezing device and a working method of the high-speed transportation line. Comprising a conveying belt body, a plurality of sets of material conveying units are arranged on the conveying belt body in the length direction of the conveying belt body at equal intervals, each material conveying unit comprises a plurality of sets of discharging discs arranged at equal intervals, and a discharging hopper groove of a horn-shaped structure is formed in the center of each discharging disc; a plurality of quick-freezing limiting mechanisms are arranged at the bottom of the discharging hopper groove in the vertical direction at equal intervals, and the diameters of the quick-freezing limiting mechanisms are sequentially reduced from top to bottom. During quick-freezing work, cold air can directly act on materials to be quick-frozen from any height and any direction, so that the cold air can freely circulate, all-directional quick-freezing can be realized without turning over the materials, the air inlet efficiency is improved, and the freezing effect is improved while the compatibility is improved.

The utility model belongs to the technical field of hot water equipment, and particularly discloses a reducer union assembly and a double-layer smoke tube, the reducer union assembly comprises an inner joint and an outer joint, the outer joint is fixedly sleeved on the inner joint, a first channel is formed by the outer joint and the inner joint, the outer joint comprises a first connecting part, a first reducing part and a second connecting part which are arranged in sequence, the outer diameter of the first connecting part is D, the outer diameter of the second connecting part is d1, and D / d1 is larger than or equal to 1.1 and smaller than or equal to 1.45. The double-layer smoke tube and the gas water heater each comprise the reducer union assembly. The double-layer smoke pipe applying the reducer union assembly can penetrate through an original mounting hole of a wall body or a window body while the air inlet efficiency is guaranteed, and the mounting efficiency is high.

The utility model discloses a safety testing device for an intelligent terminal of a gas meter, which comprises a safety testing device, and the top of the safety testing device is communicated with a detection joint. According to the utility model, the detection joint is moved to the periphery of the safety test device, then a user starts the control assembly, rotates the sealing plate, enables the opening and the rectangular groove to be ventilated, then the user starts the fan, the fan blows air to the top, the air force extrudes the convex block, the convex block moves upwards, and the ventilation opening is opened. Meanwhile, the bottom of the fan conducts air draft, air around the safety testing device is absorbed into the sealing pipe, meanwhile, the control assembly is closed, the bottom of the sealing pipe is sealed, meanwhile, the fan is closed, wind power at the bottom of the protruding block disappears, the spring rebounds to reset the protruding block, and then the air in the sealing pipe is detected through the safety testing device; and the safety test device achieves the effect of facilitating accurate detection.

This utility model belongs to the field of hydrogen fuel cell technology and relates to an ejector assembly with a pressurization function. It includes an ejector body, a return valve body installed on the top of the ejector body, and the inner cavity of the return valve body communicating with the return port at the top of the ejector body. A turbine fan is rotatably mounted inside the return valve body to compress the fuel cell return gas flowing back to the return valve body. A solenoid valve is installed at the inlet end of the ejector body, and a nozzle is installed on the solenoid valve. The nozzle extends into the mixing chamber of the ejector body, and the nozzle outlet extends to the gas channel inlet end of the ejector body. This assembly can effectively improve the intake efficiency of the return hydrogen gas, and has high structural reliability and is easy to maintain.

The utility model relates to the technical field of refrigeration, and discloses a machine head and a fan, and the machine head comprises a first shell, a second shell, a first fan and a second fan, the second shells are arranged on the two sides of the first shell, and air inlets are formed in the second shells; the air duct is fixedly connected into the first shell, and the air duct communicates with the air inlet and the air outlet; the fan blades are fixedly connected in the air duct; the first motor is fixedly connected in the air duct, connected with the fan blades and suitable for driving the fan blades to rotate; and the second motor is rotatably connected with the first shell and is suitable for driving the first shell to rotate. The air inlets are formed in the second shells on the two sides, the first motors are fixedly connected into the air channels, the first motors can drive the fan blades to rotate, air enters from the two sides, and the air inlet area is enlarged; by arranging the second motor, the second motor can drive the first shell to rotate, so that the air outlet area of the air outlet of the first shell can be changed in the rotating process, and the air outlet range is enlarged.

The utility model provides a centrifugal dust removal ventilator, which relates to the technical field of ventilators, and comprises a shell, a first motor is arranged on one side of the shell, an air inlet pipe is arranged on one side of the shell, an air outlet pipe is arranged on one side of the shell, and a filter screen is arranged on one side, far away from the shell, of the air inlet pipe. A cleaning device is arranged on one side of the air inlet pipe, the cleaning device comprises a fixing plate, one side of the fixing plate is fixedly connected with an electric telescopic rod, the output end of the electric telescopic rod is fixedly connected with a placing plate, and one side of the placing plate is fixedly connected with a second motor. And dust intercepted and filtered on the surface of the filter screen can be cleaned, the situation that dust is continuously accumulated on the surface of the filter screen, and then holes in the surface of the filter screen are blocked is avoided, and therefore the air inlet efficiency of the ventilator can be improved, and the using effect of the ventilator is improved.

The invention discloses a cylinder cover assembly, an engine and a vehicle. Belongs to the technical field of automobiles, the cylinder cover assembly is used for an engine of a vehicle, the cylinder cover assembly comprises a cylinder cover body and an air inlet manifold, the air inlet manifold and the cylinder cover body are integrally formed so as to reduce the length of the air inlet manifold and improve the air inlet efficiency, the air inlet manifold defines a pressure stabilizing cavity, and an air inlet is formed in the direction from the front end wall of the pressure stabilizing cavity to the rear end wall of the pressure stabilizing cavity. The flow area of the pressure stabilizing cavity is gradually reduced, and the minimum height difference between the pressure stabilizing cavity and the bottom face of the cylinder cover body is gradually reduced in the direction from the far end wall of the pressure stabilizing cavity to the near end wall of the pressure stabilizing cavity, so that air inlet uniformity and combustion consistency of cylinders of an engine are improved, abnormal work of the engine is avoided, and the dynamic property and economical efficiency of the engine are improved.