33results about How to "Improve air intake efficiency" patented technology

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.

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.

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 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.

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.

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 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.

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.

This utility model relates to the field of gas turbine technology and discloses an anti-surge gas turbine, including a compressor; an intake pipe installed on the compressor; an anti-surge unit, which includes an inner support and an outer support disposed inside the intake pipe; and a plurality of adjusting blades arranged in a ring between the inner and outer supports. The adjusting blades actively regulate the airflow within the intake pipe, reducing airflow separation and pressure pulsation at the intake pipe, improving the intake airflow field, and eliminating surge. Through the anti-surge unit, this utility model can adjust the blade angle in real time, dynamically changing the flow direction and velocity distribution of the airflow within the intake pipe according to operating parameters such as speed and load, maintaining the compressor operating point in a stable region, achieving precise adjustment of the blade angle, quickly suppressing pressure pulsation caused by sudden changes in operating conditions, and blocking the causes of surge.

The application discloses a highland dairy workshop environment parameter self-sensing ventilation system and belongs to the technical field of workshop ventilation systems, which comprises a preliminary filtering mechanism, the preliminary filtering mechanism comprises a pretreatment box and a filter box which are in communication with each other, the inside of the pretreatment box is provided with an air extraction fan, a precision filter screen and an activated carbon filter screen, the inside of the filter box is provided with a crude filter screen, the other end of the filter box is provided with an oil-free air compressor, one side of the oil-free air compressor is provided with a membrane separation assembly, both ends of the membrane separation assembly are provided with connecting pipes, one group of the connecting pipes is in communication with the oil-free air compressor, one side of the other group of the connecting pipes is provided with a plurality of sterilization filters, and the other side of the plurality of sterilization filters is provided with an output pipe; when the application is used, air can be comprehensively filtered, dust and bacteria in the air can be effectively removed, and the possibility of pollution can be reduced.

The utility model provides an exhaust fume collecting hood and a range hood comprising the same, the exhaust fume collecting hood is provided with an annular suction plate, an air inlet and an air duct communicated with the air inlet, the exhaust fume collecting hood further comprises a flow guide part, the flow guide part extends from the edge of the annular suction plate to the inside of the air duct, and the flow guide part is provided with a flow guide hole; the flow guide part and the inner wall of the air duct form a flow guide channel, and the surface, facing the air duct, of the flow guide part is provided with a flow guide protrusion or a flow guide recess. By arranging the flow guide part, the flow guide channel is formed between the flow guide part and the air duct, and on the basis of guiding oil smoke on the edge of the annular suction plate, reducing a vortex area on the edge of the annular suction plate, reducing the air inlet resistance on the edge of the annular suction plate and improving the air inlet efficiency, the smoke catching capacity of the smoke collecting hood is correspondingly improved. In addition, the surface of the flow guide part is provided with the flow guide protrusions or the flow guide recesses with non-smooth planes, compared with a smooth plane, airflow can enter the exhaust fume collecting hood more smoothly and more efficiently, and therefore the overall smoke suction effect and the operation efficiency are improved.

A rectifier and faucet are provided, comprising a first cavity and a second cavity. The first cavity is connected to the second cavity via a first water level passage and a first air inlet. The second cavity is connected to the atmospheric environment via a second air inlet. Air is supplied to the first and second cavities respectively through the first and second air inlets, allowing air to contact the bubbles in the water flowing through the first and second cavities, thereby increasing the size of the bubbles. After the bubbles contact the atmosphere, the bubble walls are connected to the atmosphere. Under the action of gravity, the water film at the top of the bubbles flows downward, and the surface tension causes the water film to contract and thin, causing the bubbles to burst inside the rectifier. This reduces the bubble content in the water flow, reduces the possibility of large bubbles bursting at the outlet, improves the undesirable phenomena such as water flow interruption and shaking, and enhances the user experience.

The utility model discloses a size changeable air intake pipe, including the air intake manifold for connecting engine, the air throttle valve for accurate control air intake and the pipeline main part for guiding and optimizing air intake airflow, for guiding and optimizing air intake airflow, air intake manifold and pipeline main part are connected respectively at air throttle valve's both sides, and pipeline main part is by interface section, connecting section and horn mouth section at least three section pipe body detachably connected composition, pipeline main part gradually increases along the direction of away from air throttle valve its pipe diameter. The utility model discloses size changeable air intake pipe, will air intake pipe design as multistage detachable modularization structure, need maintenance or refitting, and user only needs to simply unscrew each section pipe body, and the operation is extremely simple, and each section uses the screw thread cooperation and connects, spares the independent clamp, flange and multiple bolts, reduces the part quantity and material cost.

This utility model provides a fan assembly and a range hood. The fan assembly includes a fan and a bracket assembly. The fan has a volute and an external rotor motor. The volute forms a mounting cavity, and the external rotor motor is at least partially located within the mounting cavity. The bracket assembly has a first bracket and a second bracket, which are staggered and overlapped. The first bracket has a first mating part, and the second bracket has a second mating part. The volute has an air inlet side, and the ends of both the first and second brackets are connected to the air inlet side. One end of the central shaft of the external rotor motor passes through the first and second mating parts sequentially to connect to the bracket assembly. This effectively improves the robustness and reliability of the connection between the external rotor motor and the volute. Furthermore, the simple structure of the bracket assembly effectively ensures the air intake efficiency of the external rotor motor. Moreover, the assembly process of the bracket assembly is simple, effectively improving the convenience and efficiency of fan assembly.

This utility model discloses a cylinder head intake manifold, an engine, and a vehicle, relating to the field of engine technology. The cylinder head intake manifold is located inside the cylinder head of the engine and is used to connect to the engine cylinders. The cylinder head intake manifold includes two independently configured intake passages. Each intake passage has a valve guide mounting hole corresponding to it. Each valve guide mounting hole extends from the top of the cylinder head through the end of the corresponding intake passage and connects to the corresponding cylinder. An intake valve guide for installing a valve is fixedly connected to the upper part of each valve guide mounting hole. The end of each intake valve guide does not protrude into the corresponding intake passage. The centerline of each valve guide mounting hole is inclined at 1.5° towards the inlet side of the intake passage. This utility model improves the structure of the cylinder head intake manifold, preventing the end of the intake valve guide from protruding into the intake passage and solving the problem in the prior art where the end of the engine intake valve guide protruding into the intake passage disrupts the intake airflow.

The utility model discloses a replaceable air filter core air inlet pressure stabilization chamber, internal combustion engine and unmanned plane, include: the pressure stabilization chamber body, its inside constitution is used for stabilizing the main cavity of airflow, throttle flange, set up in the upstream end of pressure stabilization chamber body, be used for connecting throttle body, air inlet flange, set up in the downstream end of pressure stabilization chamber body, be used for connecting engine, air filter core box, it is connected with the installation mouth of being set up on the pressure stabilization chamber body wall surface in detachable mode to embed in main cavity, air filter core, its accommodation is in the inside of air filter core box, wherein, the airflow of flowing through throttle flange is after entering main cavity, passes through air filter core and filters, finally is transported to engine through air inlet flange.

The utility model relates to the technical field of compressors, and discloses a conveniently overhauled compressor case which comprises a base, a front cover fixedly connected to the right side of the top of the base, a sound insulation support fixedly connected to the right side of the top of the base, an air inlet duct fixedly connected to the top of the sound insulation support, and a top cover fixedly connected to the top of the front cover. A cooler is installed at the bottom of the top cover, a wind scooper is fixedly connected to the bottom of the cooler, an axial flow fan is installed at the bottom of the wind scooper, a machine cover is tightly attached to the left side of the front cover, and a connecting mechanism is arranged on the front side of the front cover. According to the compressor case, airflow is guided to enter the air filter in a concentrated and accelerated mode through the second ventilation filter screen and the air inlet duct, the air inlet amount of the air filter is improved, vibration generated when the compressor operates is attenuated through the sound insulation support, and therefore noise generated when the compressor operates is reduced while the air inlet efficiency of the compressor case is improved.

The invention discloses a breathing air device for a car type seat, the car type seat and a car, and relates to the technical field of car seat ventilation, the breathing air device for the car type seat comprises a fan, a lower shell, an inner shell, an upper shell and a valve assembly, and the fan is used for providing power for air flowing; the inner shell is buckled on the inner side of the lower shell, a containing cavity is defined by the inner shell and the lower shell, the fan is arranged in the containing cavity, the containing cavity is provided with an air outlet and an air inlet, the air outlet is formed in the circumferential direction of the fan, and the air inlet is formed in the position, at one axial end of the fan, of the inner shell; the upper shell is buckled on the lower shell, the inner shell is located between the upper shell and the lower shell, and an air inlet duct and an air outlet duct which are separated from each other are arranged between the upper shell and the lower shell; the valve assembly is configured to close the outer air suction opening and the inner air blowing opening while opening the inner air suction opening and the outer air blowing opening and close the inner air suction opening and the outer air blowing opening while opening the outer air suction opening and the inner air blowing opening. According to the invention, different preference requirements of drivers or passengers on the ventilation system can be met.

This application provides a centrifugal fan and electronic device, relating to the field of fan technology. The centrifugal fan provided by this application includes: a volute housing, including an air inlet surface along its own axial direction; fan blades disposed within the volute housing; a first air outlet located on a first sidewall in the radial direction of the volute housing; and an air inlet located on the air inlet surface and directly opposite the fan blades. The edge of the air inlet is constructed as an annular inclined surface formed by splicing multiple arc-shaped inclined surfaces. At least two of the multiple arc-shaped inclined surfaces have different inclination angles. The multiple arc-shaped inclined surfaces include a first arc-shaped inclined surface, which corresponds to the first air outlet along the radial direction of the fan blades. The inclination angle of the first arc-shaped inclined surface is greater than or equal to 120° and less than or equal to 130°, and the inclination angle is the angle between the arc-shaped inclined surface and the air inlet surface. This application provides a centrifugal fan and electronic device that can improve air intake efficiency and reduce noise.

This application belongs to the technical field of medical devices and discloses an airflow switching rotary valve and an oxygen generator. The airflow switching rotary valve includes a mounting base and a moving valve core. The mounting base has a distribution chamber and an air inlet communicating with the distribution chamber. The moving valve core is located inside the distribution chamber and has a moving plate sealing surface. The moving plate sealing surface is provided with an exhaust chamber. The moving valve core is provided with an air inlet channel located on the side of the exhaust chamber. The outer peripheral surface of the moving valve core is provided with multiple contact positions. The contact positions contact the cavity wall of the distribution chamber to restrict the relative movement of the moving valve core with the mounting base in its own radial direction and to restrict the deflection of the moving valve core in its own axial direction. This ensures the sealing performance between the moving valve core and the stationary valve core and reduces the manufacturing cost of the airflow switching rotary valve.

The utility model discloses a wind shell assembly and a table top range hood, and belongs to the technical field of range hoods. The fan cover shell is provided with a containing cavity and an air inlet hole, and the air inlet hole is used for inputting air into the containing cavity so that high pressure can be formed in the containing cavity. The first shell is provided with an air exhaust channel; the second shell is provided with an exhaust channel, and the first shell and the second shell are arranged in the containing cavity and communicate with the two opposite ends of the air cover shell correspondingly. The outer diameter of the first shell is smaller than the inner diameter of the second shell, and the first shell extends into the second shell; a first annular air outlet is formed between the part, extending into the second shell, of the first shell and the second shell, and the first annular air outlet can output air in the containing cavity towards the exhaust channel, so that negative pressure is generated at the end, far away from the exhaust channel, of the air exhaust channel to suck oil smoke and the oil smoke flows to the exhaust channel. By optimizing the design of the air duct, the oil smoke suction efficiency of the table top range hood and the user experience can be improved.

The invention discloses a gas-fired boiler low-nitrogen burner convenient to adjust gas inflow, and relates to the technical field of boilers, the gas-fired boiler low-nitrogen burner convenient to adjust gas inflow comprises a motor, a gas inlet pipe and a driving mechanism, a first adjusting mechanism is arranged in the gas inlet pipe, and the driving mechanism comprises a fixing disc coaxially fixed to an output shaft of the motor; the outer edge of the side wall of the fixed disc is provided with a plurality of fixed frames which are distributed along the circumferential direction of the fixed disc in an array manner; according to the device, motor rotating speed regulation and control and air door opening and closing regulation and control are combined, when the rotating speed of the motor is increased, centrifugal force drives a balancing weight to move outwards, a first telescopic rod, a fixing pipe and a second telescopic rod push a spiral rod to move axially, the spiral rod is matched with a limiting column, and linear motion is converted into rotation of a first annular fluted disc; therefore, all the blades are driven to integrally and synchronously change the deflection angles of the blades, a sensor and a complex circuit are omitted, the occupied area and the manufacturing cost of the system are reduced, the air inlet amount can be adjusted in a stepless mode in real time according to the air inlet requirement, and different air inlet requirements are met.

The utility model relates to the technical field of carbon monoxide concentration detection equipment, and discloses a carbon monoxide concentration detection device for sanitary detection, which comprises a shell and an air inlet, the air inlet is arranged at an air inlet of the shell, the air inlet of the air inlet is communicated with an assembly shell, and the assembly shell is used as an integrated mounting carrier of an air inlet system. A stable airflow transmission channel is formed through sealed communication with the air inlet, so that external airflow leakage or interference on the purity of detected gas is avoided, and a closed and controllable environment is provided for subsequent filtering, air inlet and detection links; a filtering mechanism is embedded in an air inlet of the assembling shell, an air inlet mechanism is arranged in an inner cavity of the assembling shell, and the filtering mechanism and the air inlet mechanism form a cooperative working unit in the assembling shell. According to the carbon monoxide concentration detection device for sanitary detection, negative pressure suction force generated by rotation of the fan blades can quickly guide external gas to enter the assembly shell, the power loss is reduced through the power transmission effect of the main shaft, and the gas inlet efficiency is improved.

This utility model provides a compressor valve plate air guiding device, relating to the technical field of air guiding devices. It includes a pressure reducing mechanism and a connecting pipe, the connecting pipe being fixedly connected to the input end of the pressure reducing mechanism. It also includes an adjusting air guiding component, which consists of an exhaust sleeve disposed below the pressure reducing mechanism, an adjusting sleeve, and a fan-shaped air inlet box. The top of the adjusting sleeve is connected to the bottom of the exhaust sleeve, and the fan-shaped air inlet box is disposed on one side of the adjusting sleeve. By adjusting the air guiding component, the adjusting sleeve is connected to the exhaust sleeve, ensuring smooth airflow. The fan-shaped air inlet box, located on one side, is connected to the adjusting sleeve through an annular through-hole for easy gas introduction. A snap-fit ​​rotating shaft drives the fan-shaped adjusting block to rotate, precisely controlling the air intake to meet different operating conditions. This adjustable design improves the flexibility and adaptability of the equipment, ensures stable gas delivery, improves overall operating efficiency, and reduces energy consumption and failure risks.

This invention provides a cooking appliance, comprising a body assembly, a connecting pipe, and a first fan blade. The body assembly has a cooking chamber, a heat dissipation chamber, and at least one air intake channel. The heat dissipation chamber is connected to the outside of the body assembly through the at least one air intake channel. The connecting pipe is located on the body assembly, with its first end connected to the cooking chamber and its second end connected to the heat dissipation chamber. The first fan blade is located in the cooking chamber and is used to drive gas in the heat dissipation chamber into the cooking chamber through the connecting pipe. Gas introduced by the air intake channel and other air intake paths on the cooking appliance enters the heat dissipation chamber and then enters the cooking chamber through the connecting pipe. The heat dissipation chamber absorbs fresh air from outside and then delivers gas into the cooking chamber through the connecting pipe. Since the air intake channel and the connecting pipe are no longer directly connected, the heat dissipation chamber can provide more sufficient airflow to the connecting pipe, reducing the impact of the air inlet area of ​​a single air intake channel on the air intake volume of the connecting pipe and improving the cooking effect.

The utility model provides an electric pollination device for wheat crossbreeding, which comprises a pollen storage pipe, one side of the pollen storage pipe is fixedly connected with a control machine body, one side of the pollen storage pipe is fixedly connected with a stirring pipe, and one side of the stirring pipe is fixedly connected with a pollen outlet pipe; the transverse stirring pieces and the longitudinal stirring pieces rotate along the inner side of the pollen storage pipe, large pollen balls are broken, the agglomeration phenomenon is reduced, and the qualification rate of follow-up pollen pollination is increased; meanwhile, the pollen entering the pollen storage pipe can be further crushed along with airflow generated by rotation of the bottom transmission fan, the pollen is in a single-grain suspension state, meanwhile, the pollen is guided to form a vortex flow field in the pollen storage pipe along the airflow track, the uniformity of the pollen in the pollen storage pipe is improved, accumulation of the pollen is reduced, and the pollen quality is improved. The pollination uniformity during subsequent pollination is improved; and pollen accumulated and attached to the surface of the top blocking net is cleaned through continuous cleaning of the top cleaning brush, and the air inlet efficiency of the top blocking net is improved.

The invention discloses a variable tumble air inlet system of an engine, which relates to the technical field of automobile engines and comprises an air inlet channel, a flow guide body and a control system. The air inlet channel is used for conveying airflow to the combustion chamber. The flow guide body is located in the air inlet channel and comprises an upstream part, a downstream part and a connection part. The downstream end of the upstream part is fixedly connected with a first rotating shaft, and the upstream end of the downstream part is fixedly connected with a second rotating shaft. The first rotating shaft and the second rotating shaft are rotationally installed on the side wall of the air inlet channel. The connecting part is located between the upstream part and the downstream part, so that the flow guide body can be in an arch shape, and the protruding direction of the arch faces the axis of the air inlet channel. The control system comprises a rotating speed sensor, an actuator and a controller. The rotating speed sensor is used for monitoring the real-time rotating speed of the engine and transmitting the rotating speed to the controller. The actuator is used for driving the first rotating shaft and the second rotating shaft to rotate. And the controller is used for controlling the action of the actuator. The requirements for torque power at different rotating speeds can be met by adjusting the actual flow passing area and changing the tumble ratio in the combustion chamber.