22results about How to "Reduce intake resistance" patented technology

The utility model discloses a rotational flow tube type air prefilter, belongs to the technical field of air prefilters, and solves the problems of high cost and short service life of the existing fan blade type prefilter. The device comprises an air inlet cavity and an air outlet cavity, a plurality of rotational flow pipes are arranged in the air inlet cavity, the air inlet cavity is communicated with the air outlet cavity through the rotational flow pipes so that fluid containing impurities in the air inlet cavity can enter the air outlet cavity after being separated by the rotational flow pipes, and the rotational flow pipes are symmetrically arranged relative to the X-axis direction and the Y-axis direction at the same time. According to the cyclone tube type air prefilter, the production cost can be effectively reduced, the service life is prolonged, and the impurity separation effect is improved.

This invention relates to a commercial vehicle intake system and a commercial vehicle, belonging to the field of vehicle power systems. The technical solution is as follows: A commercial vehicle intake system includes an intake duct, an oil filter, and an air filter connected sequentially along the airflow direction. A water-screening assembly is installed within the air inlet of the intake duct, comprising a water-screening plate and a water collection hopper, the bottom of which connects to the outside of the intake duct. A tower-type water-filtering assembly is installed within the air outlet of the intake duct, comprising multiple stacked blades, with a first water collection trough below the blades. A swirl assembly is installed at the air inlet of the oil filter, comprising a swirl fan, with a second water collection trough below the fan. This solution, through a three-stage water removal assembly, gradually separates moisture from the air while simultaneously improving the removal capacity of dust and other impurities, significantly reducing the moisture and dust content of the air entering the oil filter and air filter, thus ensuring the service life of the oil filter and air filter and the combustion performance of the engine.

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.

The present invention discloses an impeller, a mixed flow fan and an air conditioner. The impeller includes a hub, a wheel cover and a plurality of blades, which are connected between the outer surface of the hub and the inner surface of the wheel cover and include a leading edge located on the side of the air inlet end. On a transverse projection plane perpendicular to the axis, the projection of the contour line of the leading edge has a first intersection point intersecting with the projection of the hub and a second intersection point intersecting with the projection of the wheel cover, and the projection of the contour line of the leading edge is a concave curve connecting the first intersection point and the second intersection point. The leading edge of the blade of the impeller of the present invention is roughly concave, so compared with a planar leading edge, when the total air inlet area of ​​the impeller is the same, the air inlet area of ​​the flow channel between adjacent blades is increased, thereby improving the air inlet smoothness.

The invention discloses an air filter regeneration control method, which relates to the technical field of air filter regeneration and comprises the following steps: controlling a first pressure sensor to obtain a negative pressure value at an air outlet of an air filter; obtaining an engine state, a regeneration gear switch state and a regeneration purging device state; the control module judges whether the air filter is in a regeneration needing state or not according to the negative pressure value at the air outlet of the air filter; and when the air filter is in a regeneration needing state, the regeneration purging device is turned on or turned off according to the state of the regeneration purging device, the state of the engine and the state of the regeneration gear switch. Maintenance of the air filter can be automatically completed, the filter element function can be rapidly achieved, air inlet resistance is reduced, engine power and fuel economy are improved, the number that a user takes out a filter element for soot blowing regeneration can be reduced, and the burden of the user is relieved.

The embodiment of the invention provides an air conditioner indoor unit, an air conditioner and an air conditioner control method, and the air conditioner indoor unit comprises a shell, a partition assembly, a first draught fan and a second draught fan; the shell is provided with an air inlet, a first air outlet and a second air outlet, and an air passing space, a first air duct communicating with the first air outlet and a second air duct communicating with the second air outlet are arranged in the shell; the separation assembly comprises a separation plate and a driving mechanism, and the driving mechanism drives the separation plate to move so that the separation plate can be switched between the storage position and the separation position; when the partition plate is located at the storage position, the air inlet communicates with the first air channel and the second air channel through the air passing space. When the partition plate is located at the partition position, the partition plate divides the air passing space into a first air passing channel communicating with the air inlet and the first air duct and a second air passing channel communicating with the air inlet and the second air duct. The air conditioner indoor unit provided by the embodiment of the invention has a better air outlet effect in various air outlet modes.

The utility model relates to the technical field of air filter accessories, and discloses an automobile air filter pipe fitting with a noise reduction structure, which comprises a pipe fitting body, a rod body of the pipe fitting body is an inclined irregular rectangle with a plane top end and a plane bottom end, and the bottom end of the pipe fitting body is fixedly connected with a lower connecting pipe. The left side of the front end of the lower connecting pipe is fixedly connected with an air outlet pipe in a penetrating mode, the inner wall of the air outlet pipe is communicated with the inner wall of the lower connecting pipe, the top end of the pipe fitting body is fixedly connected with an air inlet pipe, and a noise reduction groove is formed in the position, close to the left side of the air outlet pipe, of the inner wall of the front end of the lower connecting pipe. According to the utility model, by arranging the noise reduction groove, leftward gas entering the lower connecting pipe is blocked, so that the gas inlet resistance can be reduced, further, certain gas inlet noise is reduced, and certain gas inlet smoothness and gas flow convolution are improved; and noise generated by collision between a certain amount of gas and the inner wall of the pipe fitting when the gas is transmitted in the pipe fitting body can be absorbed by arranging the sound absorption folding sleeve, and the noise reduction effect is further improved.

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.

This invention provides a jet-type gas turbine guide device, including a guide, a heat dissipation assembly, and a flow divider. The guide consists of an outer ring, inside which is an inner ring. The invention features a hollow cavity inside the blade, with heat dissipation holes arranged along the inner side of the blade, communicating with the hollow cavity. Through holes are formed around the surface of the outer ring, and fuel injectors are installed on the surface of these through holes. During operation, the fuel injectors inject fuel into the hollow cavity inside the blade through the through holes. The fuel entering the hollow cavity carries away the heat generated by the blade, thus cooling it and preventing thermal stress at the leading edge that could cause cracks. The fuel flows out through the heat dissipation holes and into the combustion chamber. This guide has a cooling and heat dissipation structure, thereby improving its service life.

The invention discloses an oxygen-enriched turbine engine and a thermodynamic cycle method of the oxygen-enriched turbine engine. Comprising an oxygen-enriched gas generator, a turbine, a gas compressor, an oxygen-enriched gas auxiliary atomization injector and an active cooling combustion chamber, the oxygen-enriched gas generator comprises an oxidizing agent inlet, an oxidizing agent liquid collecting cavity, a catalytic bed, a reaction cavity located on the downstream of the catalytic bed, a fuel inlet and an oxygen-enriched gas outlet, and the fuel inlet and the oxygen-enriched gas outlet are located in the side wall face of the reaction cavity. A valve located on a fuel supply pipeline controls on-off of fuel, and two working modes of the oxygen-enriched fuel gas generator can be obtained, namely an oxidizing agent and fuel double-component oxygen-enriched combustion working mode and an oxidizing agent single-component catalytic decomposition working mode. The problems that rich oil circulation combined power is prone to coking and carbon deposition, combustion is not easy to organize, and the power capability of a turbine is limited are solved.

The utility model discloses a vertical filter feeder pipe damping device, including the air inlet pipe of setting in the feeder pipe and being close to the feed valve, air inlet pipe one end is connected the feeder pipe, the other end sealed connection U -shaped pipe, U -shaped pipe free open end is exposed to the washing liquid liquid level above the washing liquid tank, and the curved lower section is soaked in the washing liquid and is provided with micropore, is equipped with the one-way valve of being close to U -shaped pipe and the normally open valve of being close to the feeder pipe on the air inlet pipe. After feeding is completed, the feeder pipe forms vacuum, and the one-way valve opens, and air is rapidly entered through U -shaped pipe and eliminates vacuum, and simultaneously drives a small amount of washing liquid to clean the pipeline, and after air pressure balance, the washing liquid is supplemented automatically through the micropore. The device has small air flow resistance, stable cleaning, convenient maintenance, effectively prolongs the service life of equipment, and has strong adaptability.

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 present invention discloses an air filter and a vehicle. The air filter comprises: a shell, wherein the shell has a first space and a second space; a guide member, wherein the guide member has an airflow space and is arranged in the first space, wherein the airflow space is connected to the second space and the air outlet, wherein the first space has an airflow channel connected to the air inlet and the second space, wherein the airflow channel is arranged around the guide member along the circumference of the guide member; and a filter member, wherein the filter member is arranged in the airflow space. Thus, by arranging the filter member in the guide member, the airflow at the air inlet cannot directly contact the filter member, thereby preventing dust from accumulating in the filter member and increasing the dust capacity of the air filter. By arranging the guide member, the inlet and outlet directions of the airflow passing through the filter member are parallel or coaxial, thereby enabling the air filter to be adapted to a direct-flow filter element without changing the shell structure, thereby increasing the dust capacity of the air filter, reducing the air intake resistance, increasing the service life of the air filter, and reducing the weight of the air filter.

To address the limitations of existing pulse detonation combustors using detonation jet ignition, which require long jet tubes and thus restrict the increase of their operating frequency, and the dependence of stable operation of pulse detonation turbine engines on the performance and reliability of the igniter, this invention proposes a pulse detonation combustor based on rotating detonation wave ignition. This invention utilizes the relatively high frequency of rotating detonation combustion and the requirement for only a single ignition. The rotating detonation wave generated by the rotating detonation chamber serves as a continuous high-energy ignition source, igniting the explosive mixture within the detonation jet channel. This creates a high-energy detonation jet at the channel's exit, which then flows into the pulse detonation tube and ignites the explosive mixture within. This invention, while maintaining the excellent initiation performance of the detonation jet ignition method, overcomes the adverse effects of long jet tubes and high-frequency ignition on the efficient and stable operation of pulse detonation turbine engines.

This utility model relates to the field of wall-hung boiler technology, and in particular to a premixed combustion fan for wall-hung boilers. A premixed combustion fan for wall-hung boilers includes a volute and a motor mounted on one side wall of the volute. An impeller is disposed inside the volute. The motor includes a mounting base and a motor body. The mounting base is connected to the side wall of the volute. The motor body includes a shaft, a rotor core, and a stator assembly. The rotor core is fixed to the shaft. The stator assembly includes a square stator core and a support frame for fixing the stator core. The support frame is connected to the mounting base. A cooling fan is mounted at one end of the shaft, and the impeller is press-fitted to the other end of the shaft. This utility model effectively solves problems related to vibration and noise, motor heat dissipation, impeller connection reliability, gas mixing efficiency, and ease of assembly.

This utility model belongs to the field of gas turbine technology, and specifically relates to an air intake device for an aero-derivative gas turbine compressor. The air intake device includes an intake casing, characterized in that: a shroud is fixed inside the intake casing, an inlet rectifier cone is fixed outside the intake casing, a cleaning pipeline is installed on the inlet rectifier cone, and a hydraulic motor drive and lubrication assembly is installed in the inner ring of the intake casing. The hydraulic motor drive and lubrication assembly is enclosed within the shroud, and its pipeline is connected to the hydraulic motor drive and lubrication assembly pipeline. The beneficial effects of this utility model are: it achieves gas turbine intake rectification, avoids leakage of parts affecting intake efficiency, and reduces intake resistance. By accelerating and uniformly introducing external air into the compressor first stage through a tapered channel, it reduces airflow separation, ensures that air enters the compressor flow path smoothly along the axial direction, and avoids compressor efficiency reduction or surge due to uneven flow velocity.

The invention relates to an air inlet system, a vehicle and a control method, and relates to the technical field of engine air inlet systems, the air inlet system comprises an air inlet channel, and the air outlet end of the air inlet channel is provided with a first air outlet and a second air outlet which can be opened and closed; a first air inlet and a second air inlet are formed in the air inlet end of the air filter, and the second air inlet is communicated with the second air outlet through a pipeline; and the air coarse filter is arranged on a pipeline between the first air outlet and the first air inlet. Whether the current dust concentration is smaller than the set dust concentration or not is judged, if the current dust concentration is larger than or equal to the set dust concentration, the first air outlet is opened, the second air outlet is closed, the air enters the air filter after passing through the air coarse filter, and if the current dust concentration is smaller than the set dust concentration, the second air outlet is opened, and the first air outlet is closed. The vehicle can reduce the air inlet resistance without using an air coarse strainer in a low-dust environment, so that the oil consumption is reduced, the power is improved, and the problems that the oil consumption is increased and the power is reduced in a low-dust state in the prior art are solved.

The utility model discloses a distributed dust removal system which comprises a plurality of dust suction devices, a sewage pipe and a backflow treatment bin, the dust suction devices can be distributed in a plurality of areas needing dust removal, sewage outlets of the dust suction devices are communicated with the sewage pipe in parallel, and the tail end of the sewage pipe is connected with the bottom of the backflow treatment bin. A demisting device, an air outlet, a sludge pipe and a clear water pipe are arranged in the backflow treatment bin, the clear water pipe is connected with a water inlet pipe of the dust suction device after being connected with a water pump and provides a water source for the dust suction device, an inlet of the sludge pipe extends into the bottom of the backflow treatment bin, an outlet of the sludge pipe is connected with the filter press, and the air outlet is connected with the main fan. The starting end of the sewage pipe is higher than the tail end of the sewage pipe in the horizontal direction, sewage can conveniently flow back to the backflow treatment bin, dust is effectively mixed at a high speed for multiple times in the dust collection stage through the arrangement of the dust collection device, the dust collection efficiency and effect are improved, the treatment process of the dust collection system is shortened, water resources are recycled, and the environment is protected. And'zero discharge 'of dust and sewage is realized.

According to the technical scheme, the sinking type air inlet mechanism is characterized in that an air filter installation support is arranged in a vehicle body, a connecting block is arranged on the top face of the air filter installation support, an air filter is fixedly installed on the top face of the connecting block, the air filter installation support is made of Q235A carbon steel, and the air filter installation support is made of stainless steel. The air filter installation support is composed of a connecting plate inclined in the vertical direction, a horizontal plate at the top end and a fixing plate with the bottom end perpendicular to the connecting plate, through the design of the air filter, the air filter can serve as the most important filtering equipment of an air inlet mechanism, the purity and safety of inlet air are guaranteed, and through the design of the air filter installation support, the air filter installation support is convenient to use. Low-position installation of the device body can be achieved, compared with traditional high-position air inlet, an air inlet channel of the device is shortened and is not limited by the sectional area of a pipeline, meanwhile, the air inlet amount is increased, the air inlet resistance is effectively reduced, and due to the design of the second air inlet pipe, it can be guaranteed that the pipeline has enough length to buffer sucked air through the design of a straight pipe and an arc-shaped pipe.

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.

The utility model discloses a wet dust collector which comprises a cylinder body, a dust inlet and a drain outlet are arranged on the cylinder body, a shunting device and a mixing pipe are arranged in the cylinder body, the mixing pipe is arranged below the shunting device, the dust inlet, close to the shunting device, of the mixing pipe is in a horn mouth shape, and the length of the mixing pipe is not less than three times of the diameter of the mixing pipe. The center line of the flow dividing device and the center line of the mixing pipe coincide with the center line of the cylinder body, the sewage draining exit is formed in the bottom of the cylinder body, the bottom of the cylinder body and the horizontal plane are arranged in an inclined mode, an air draft system is arranged at the end close to the sewage draining exit, and dust-containing waste gas and water mist are effectively mixed multiple times through the flow dividing device and the mixing pipe. And the dust removal efficiency and effect are improved.

The present invention discloses an electrically controlled breathing circuit device, including a pipe joint, a main breathing tube, a main exhaust and sputum discharge branch and an inhalation branch, a valve plate is arranged in the inhalation branch, and a motor for driving the valve plate to rotate is arranged on the outer side of the inhalation branch; the electrically controlled breathing circuit device also includes a sensor for detecting abdominal respiratory movement and an electronic control unit for controlling the operation of the motor, the electronic control unit determines the respiratory state according to the detection signal of the sensor, and controls the motor to rotate the valve plate to close or open the inhalation branch. The electrically controlled breathing circuit device of the present invention has a short length of the inhalation branch because the air inlet of the inhalation branch is close to the upper port of the main breathing tube, thereby greatly reducing the air intake resistance. In addition, when the patient exhales and expectorates, the valve plate closes the inhalation branch, and the airflow can only be discharged from the exhaust and sputum discharge branch, thereby avoiding the problem of sputum being discharged from the inhalation branch and splashing around.