109 results about "Air flow meter" patented technology

The invention belongs to the technical field of aluminum electrolysis, and particularly relates to an electrolytic aluminum oxide concentrated phase conveying solid-gas ratio monitoring system and method, and the system comprises a control system, a material tank system, a compressed air system and a concentrated phase conveying system; the output end of the charging bucket system is connected with the input end of the concentrated phase conveying system; the output end of the compressed air system is connected with the charging bucket system and the concentrated phase conveying system; an air flow meter is mounted on the compressed air system, a weighing sensor is mounted on the charging bucket system, and the control system calculates and controls the solid-gas ratio through the air flow meter and the weighing sensor; the solid-gas ratio is calculated and controlled through the control system, and the working efficiency is improved.

The utility model discloses an integrated three-temperature memory testing machine. The integrated three-temperature memory testing machine comprises a testing cabinet, an airflow instrument, an air blowing module, a heat shield, a tester and an electric control system, the airflow instrument and the electric control system are arranged in the test cabinet, the tester is arranged on the test cabinet, the tester is sleeved with a heat shield, the heat shield, the blowing module and the airflow instrument are sequentially communicated, and the electric control system is connected with the airflow instrument and the tester; according to the integrated three-temperature memory testing machine, an integrated scheme is adopted, the low-medium-high airflow instrument, the tester and the electric control system are integrated in the testing cabinet, and the blowing module and the heat shield are carried to impact a tested device with high-speed gas, so that low-medium-high environment temperature control is realized; therefore, the manual single-machine small-sized three-temperature memory testing machine is miniaturized, modularized, capable of being operated by a single machine and comprehensive in function, and fills the blank that no small-sized three-temperature memory testing machine exists in the market.

The invention relates to a multifunctional heat dissipating capacity testing device. The system comprises an engine, an engine water inlet pipe, an engine water outlet pipe, a fan, a water tank, an intercooler, a water inlet temperature sensor, a water outlet temperature sensor, an intercooling front pipeline, an intercooling rear pipeline, an intercooling air inlet temperature sensor, an engine air inlet temperature sensor, a water flow meter, an air flow meter, a baffle, an electronic fan, a water tank front temperature sensor and an intercooling front temperature sensor. An engine air inlet pipeline, an environment temperature sensor and an environment air conditioner. The invention further relates to a testing method using the multifunctional heat dissipating capacity testing device. The method can predict and solve the high temperature condition of the water tank and the intercooling system when the environmental condition and the whole vehicle configuration change, and saves the time cost and the labor cost.

The embodiment of the application provides a clothes dryer, comprising: a cabinet; a drying barrel and an air circulation system; an air inlet assembly and an air outlet assembly; a heater and an air inlet pipeline, an air flow meter; a filter screen, an air outlet pipeline and an air outlet fan, an air outlet motor and a fan; a controller connected with the air flow meter and the air outlet motor respectively, used for executing a clothes dryer filter screen detection program, the program comprising the following steps: controlling the air outlet motor to reach a preset rotating speed and keeping the air outlet motor running at the preset rotating speed; detecting a current power value of the air outlet motor in the process of keeping the air outlet motor running at the preset rotating speed and a historical power value detected in the process of historically executing the clothes dryer filter screen detection program, and judging whether the filter screen is blocked based on the current power value and the historical power value; and / or, obtaining an air speed value of the air flow meter and judging whether the filter screen is blocked based on the air speed value; if at least one of the above is yes, it is determined that the filter screen is blocked. The application can improve the accuracy of filter screen cleaning detection.

The utility model relates to the field of geological science, and discloses a frozen soil melting compression tester which comprises an operation table, a plurality of testers are fixedly connected to the top of the operation table, a control cabinet is fixedly connected to the right side of the operation table, a water flow meter is arranged on the upper portion of the front side of the control cabinet, and an air flow meter is arranged on the upper portion of the front side of the control cabinet. The lower part of the front side of the control cabinet is provided with a water level gauge, the control cabinet is provided with a computer, the top of the tester is fixedly connected with a reaction frame, the front side of the reaction frame is provided with a displacement meter, the interior of the reaction frame is in threaded connection with a puller screw, and the bottom end of the puller screw is provided with a heating pressure transfer plate. According to the utility model, through the cooperation of the tester, the heating and pressure transmitting plate, the heat preservation jacket, the pressurizing plate, the water container and other structures, errors caused by manual operation are reduced, the experiment precision and efficiency are improved, meanwhile, the melting environment is simulated, experiment data under real conditions are provided, and the reliability and practicability of research results are enhanced.

The utility model provides an automobile air flow meter, and belongs to the technical field of automobile accessories. Comprising a machine barrel, a maintenance seat is arranged at the top of the machine barrel, an opening communicating with the interior of the machine barrel is formed in the top of the maintenance seat, a heat preservation ring is fixed to the inner wall of the opening in a surrounding mode, positioning grooves are symmetrically formed in the two sides of the top of the maintenance seat, and a heat preservation cover is matched with the top of the maintenance seat; the butt joint cylinder is inserted into the top opening of the maintenance seat and abuts against the upper end face of the heat preservation ring, and positioning plates are symmetrically fixed to the two sides of the bottom of the heat preservation cover and inserted into the positioning grooves. According to the utility model, a multi-stage disassembly and assembly structure is adopted, so that core components can be quickly disassembled, assembled and overhauled during later overhaul without integrally disassembling and assembling the core components, the later overhaul and maintenance efficiency can be improved, and meanwhile, by arranging the heat preservation cover, the sealing effect on the interior of the machine barrel can be improved, the interference of external temperature is reduced, and the service life of the machine barrel is prolonged. And the hot-wire type air metering effect can be ensured.

The present application relates to the technical field of fuel cell, in particular to a fuel cell system and a vehicle, the present application constructs fault-tolerance control, so that after the flowmeter failure, the way of directly giving up the judgment of air flowmeter is abandoned, and the pressure data and temperature data are used for judgment, so that the air system control can still be normally operated, the actual stack flow pressure is maintained in the target range, and the normal operation of the fuel cell is realized.

The cylinder cover detection equipment provided by the present invention includes: a frame, a base plate detachably arranged on the frame, a pressing assembly for pressing the cylinder cover onto the base plate, a detection assembly for detecting the performance of the PRV valve on the cylinder cover, and a control assembly. The detection assembly includes first and second air tanks and inlet and outlet flow meters. The first air tank is connected to the through hole located on the base plate through the inlet flow meter and can supply air to the internal cavity of the cylinder cover. The second air tank is connected to the working condition pipe of the PRV valve and can adjust the working condition of the PRV valve. The outlet flow meter is connected to the outlet pipe of the PRV valve and can detect the outlet flow of the PRV valve. The display screen of the control assembly is electrically connected to the inlet and outlet flow meters and can display and record data measured by the inlet and outlet flow meters. The pressing and detection assembly actions are controlled by the control button of the control assembly, so as to realize automated operation and achieve the technical effect of automatically detecting the performance of the PRV valve under different working conditions.

The application provides a methanol reforming hydrogen production device test bench, and relates to the technical field of new energy sources.The methanol reforming hydrogen production device is connected with an air supply branch, a methanol water vapor supply branch, a heating branch, a reforming gas treatment branch and a temperature measurement branch.The air supply branch comprises a blower, an air flow meter and a temperature sensor 1.The methanol water vapor supply branch comprises a constant flow pump 1, a liquid flow meter 1 and a temperature sensor 2.The heating branch comprises a constant flow pump 2, a liquid flow meter 2, a temperature sensor 3 and a temperature sensor 4.The temperature measurement branch comprises a temperature sensor 5, a temperature sensor 6, a temperature sensor 7 and a temperature sensor 8.Feedback regulation is realized through the cooperation of a plurality of constant flow pumps, a plurality of liquid flow meters, a blower, an air flow meter and other controllable actuators and sensors, so that the reactant flow entering the methanol reforming hydrogen production device can be accurately controlled, and quantitative analysis on the performance of the methanol reforming hydrogen production device can be realized.

The utility model belongs to the field of fuel cells, and discloses an energy recovery device of a fuel cell turbine recovery expansion machine. The device comprises an air flow meter, a turbine recovery expansion machine, an intercooler, a humidifier and an electric pile, the air flow meter, the turbine recovery expansion machine and the intercooler are connected through pipelines, and an outlet pipeline of the intercooler is connected to an air inlet of the electric pile through the humidifier; and an air outlet of the electric pile is connected with a turbine air inlet of the turbine recovery expansion machine. According to the device, air firstly enters the vortex end of the air compressor to be subjected to energy recovery, and then the air is supplied to the humidifier to be humidified after being recovered, so that energy waste is avoided, and the recovery efficiency is improved.

The utility model discloses an energy-saving system for preparing nitric acid by absorbing nitrogen oxide tail gas, which comprises a gas inlet buffer tank, a compressor, a compressed air inlet system and a NOx absorption tower system, the gas inlet buffer tank is connected with a NOx inlet pipe and an air inlet pipe, the air inlet pipe is provided with an air flow meter, nitrogen oxide tail gas is introduced into the NOx inlet pipe, and the NOx absorption tower system is connected with the compressor. A gas outlet of the gas inlet buffer tank is connected with a gas inlet of the compressor through a mixed gas inlet pipe, a gas outlet of the compressor is connected with the NOx absorption tower system through a mixed gas outlet header pipe, and the compressed air inlet system is connected with the mixed gas outlet header pipe; an air inlet pipe opening of the air inlet pipe is directly communicated with the atmosphere. Self-sucked air and NO in the tail gas react in the gas inlet buffer tank to generate NO2, so that the oxidation degree of the tail gas before entering the absorption tower is improved, the equilibrium concentration of nitric acid in the tower kettle of the absorption tower is improved, and the standing time required by the absorption tower is reduced; the self-sucked air can effectively reduce the usage amount of compressed air, and the energy consumption of the compressed air is reduced.

To provide a fuel cell system capable of effectively eliminating clogging caused by particulate matter.SOLUTION: The fuel cell system (A) includes: a housing container (9) for accommodating a cell stack (6) and a combustion unit (8) in an internal space (9s); an air supply passage (13) having an air filter (21), an air blower (7), and the housing container (9) connected in series, a flow meter (22) being disposed in the passage; and a control unit (10). The control unit (10) acquires an air flow rate of air passing through the air supply passage (13) and controls the flow rate by adjusting the duty ratio of power supply to the air blower (7). The control unit (10) calculates the degree of blockage of an air supply system (23) including the air filter (21), the air blower (7), and the air supply passage (13), on the basis of the duty ratio and the air flow rate, and also acquires the outside air temperature. The control unit (10) initiates air flow improvement operation on the basis of the degree of blockage, and determines the amount of water vapor to be supplied to the air supply system (23) on the basis of both the degree of blockage and the outside air temperature.SELECTED DRAWING: Figure 1

The utility model belongs to the fuel cell air compressor test field, and especially relates to a controllable humidity hydrogen fuel cell system single-stage air compressor test bench comprising an air filter used for inputting air; the first-stage temperature and humidity control box realizes temperature and humidity control based on electric heating and water spraying and is connected to the air filter; the second-stage temperature and humidity control box realizes temperature and humidity control based on a mold temperature controller and water spraying and is connected to the first-stage temperature and humidity control box; the air inlet pressure control valve is connected to the second-stage temperature and humidity control box; the air flow meter is connected to the air inlet pressure control valve; the single-stage air compressor is connected to the air flow meter; the first intercooler is connected to the single-stage air compressor; the dehumidification control box achieves dehumidification based on cooling of the mold temperature controller and is connected with the first intercooler. The exhaust control valve is connected to the dehumidification control box; a muffler connected to the exhaust control valve; and the inversion module is electrically connected to the single-stage air compressor, so that a humidity-controllable hydrogen fuel cell system single-stage air compressor test scheme is realized.

The application discloses a kind of air flowmeter circuit board splitting device, it is related to electronic component processing field, including bottom plate, sliding plate, positioning mould and rotating assembly;The translation device is equipped on the bottom plate, the rack is fixedly connected on the bottom plate, the rack is equipped with splitting device and two scrap collecting device, the positioning mould is rotatably connected with sliding plate, the rotation of pivot is used to drive piston rod to move up and down to generate an outward suction force in the case where additional dust collection equipment is not increased, then the dust and scrap generated in the split can be collected by the cooperation of reserved cavity and reserved slot and through slot between upper plate and lower plate;Rotatable positioning mould, cooperate with the splitting device of multiple saw blades, can rotate the circuit board after one pass, so that the circuit board is walked again, to and fro once can realize the splitting of circuit board, compared with using general equipment, efficiency is higher.

The invention relates to the technical field of fluid measurement and diagnosis, in particular to a diagnosis device and method for the air flow of a fuel cell, and the method comprises the steps: carrying out a multi-working-condition test before an air compressor leaves a factory, and building a standard characteristic map of the rotation speed-pressure ratio-flow of the air compressor; then, the rotating speed, inlet and outlet pressure, temperature and actual flow data of an air compressor are collected in real time in the operation process of the fuel cell system, the theoretical flow under the standard working condition is obtained by calculating the pressure ratio and inquiring the atlas, and meanwhile the actually-measured flow is converted into the standard working condition; finally, whether the air flow meter is abnormal or not is judged by comparing whether the deviation between the theoretical value and the converted actual value exceeds a threshold value or not, and therefore online real-time diagnosis and fault alarm of the flow meter are achieved. According to the invention, no extra hardware needs to be added, high-precision non-intrusive diagnosis can be realized only through a software algorithm and pre-stored data, and the reliability and maintenance efficiency of the fuel cell system are remarkably improved.

The invention discloses a method and system for determining the performance of a water ring vacuum pump of a vacuumizing system, and relates to the technical field of vacuum pump performance detection. Calculating the volume flow of the mixture; calculating isothermal compression efficiency; and determining the performance of the water ring vacuum pump of the vacuumizing system based on calculation results. The method for determining the performance of the water ring vacuum pump of the vacuum-pumping system is combined with existing measuring points on site, the problem that an air flow measuring element is lacked on site is solved by establishing an air flow calculation method, the moisture-pumping air mass flow of the water ring vacuum pump is obtained, and finally the real performance of the water ring vacuum pump is obtained. And certain help is brought to operation supervision and maintenance of the vacuum pump. According to the method, detection software related to the cold end system can be embedded, and automatic detection and control of the cold end system are achieved.

The invention discloses a control method for remote fault diagnosis and processing of a fuel cell air flow meter. The running condition of the fuel cell system can be monitored in real time, a fault detection mode in power-on self-test of parts such as an air flow meter is activated when the fuel cell is powered on, whether a fault exists or not is judged within the specified time, if no fault exists, a normal mode is entered, and a PID closed-loop control mode is adopted, so that the fault detection efficiency is improved. If a fault exists, entering a fault mode, and adopting an interpolation look-up table calculation mode to quickly compare and select a target value of pressure output according to the calibrated change curve data of the fuel cell current relative to the air inlet pressure of the electric pile, so as to ensure the quick and accurate implementation of the processing method; according to the invention, a full-life-cycle management mode of the air flow meter is realized through a power-on self-test-dual-algorithm mode switching-cloud cooperation three-level architecture, so that the state of the air flow meter is detected and diagnosed in real time, the state is controlled, prevention is carried out in advance, maintenance is carried out in time, and the operation smoothness is guaranteed.

The utility model discloses an air volume adjusting device of a constant-displacement air conditioner, which relates to the technical field of air volume adjustment of air conditioners, and comprises a constant-displacement air inlet air conditioner, one end of the air inlet air conditioner is communicated with an air flow meter through a pipeline, and the other end of the air inlet air conditioner is communicated with a precision filter through a pipeline, adjustable electric valves are mounted on a pipeline between the air inlet air conditioner and the air flow meter and a pipeline between the air inlet air conditioner and the precision filter, and the other ends of the adjustable electric valves between the air inlet air conditioner and the air flow meter are connected with an air pump through pipelines; according to the utility model, a part of air is pumped out from the rear part of the system through the air pump and is injected into the pipeline between the air inlet air conditioner and the air flow meter, so that the purpose of increasing the air volume is achieved under the condition that the displacement of the air inlet air conditioner is not changed, and the air flow in the brake emission measuring instrument is controlled through the opening degree of the two adjustable electric valves.

The utility model discloses a multifunctional integrated intercooling humidifier structure for a hydrogen fuel cell, which relates to the technical field of hydrogen fuel cells and comprises a hydrogen storage tank, a hydrogen regulating system, an integrated intercooling humidifier, an air compressor, an air flow meter, an air filter, a box body, an electric pile and a tail discharge device, components integrated by the integrated intercooling humidifier comprise a hydrogen purging electromagnetic valve, a shunting adjusting throttle valve, a humidifier, a back pressure throttle valve, an air main path throttle valve, a bypass throttle valve, an air temperature and pressure sensor, an intercooler and an intercooler cooling water path opening and closing valve. The whole assembly has different functions, only single insulation treatment needs to be carried out, the insulation treatment mode is simple, an air flow channel is simple in structure and small in flow resistance, and meanwhile parts such as connecting pipelines and connecting joints between different assemblies are omitted.

The utility model discloses a pneumatic stirring mechanism for sewage treatment, which comprises a main body assembly, the main body assembly comprises a sewage pool, an air pump, a filter box, an air pipe, an air flow meter, a pneumatic motor, a driving piece, a stirring piece and a drainage pipe, the air pump is arranged at the top of the sewage pool, the filter box is arranged at one end of the air pump, and the air pipe is arranged at the other end of the air pump. The gas pipe is arranged on one side of the filter box, and the gas flow meter is arranged on the outer side of the gas pipe. The sewage treatment device has the beneficial effects that the effect of pneumatically stirring sewage is achieved by arranging the pneumatic motor, the effect of stirring and aerating the sewage is achieved by arranging the stirring piece, the aeration uniformity is improved, the effect of stirring sludge at the bottom of a sewage pool is achieved by arranging the driving piece, and the sewage treatment effect is improved. By arranging the filtering assembly, it is ensured that air entering the pneumatic motor is clean, and damage caused by impurities to equipment is avoided.

The invention provides a temperature control system of a solid oxide fuel cell power generation device. The temperature control system comprises a solid oxide electric pile, a hot box, a preheater, a heat exchanger, a fan, a combustion-supporting air flow meter, a combustion-supporting air electric control valve, a cathode air flow meter and a cathode air electric control valve, the method has the beneficial effects that in the cold start stage, high-temperature combustion tail gas is input into the hot box through the preheater, the combustion tail gas surrounds the periphery of the solid oxide galvanic pile to heat the solid oxide galvanic pile, and the heating rate of the galvanic pile can be controlled; in a power generation stage, if the temperature of the electric pile is lower than a set value, the preheater can be started again, and high-temperature combustion tail gas is input into the hot box, so that the temperature of the electric pile rises to a set working temperature; if the temperature of the galvanic pile is higher than the set value, fuel input into the preheater can be stopped, and room-temperature air is input into the hot box only through the preheater, so that the temperature of the galvanic pile is reduced to the set working temperature, and the galvanic pile is always at the optimal working temperature.

The utility model discloses an air compressor integrated system which comprises an air compressor main body, an air inlet is formed in one end of the air compressor main body, an air flow meter and a temperature and pressure sensor are arranged at the air inlet, an outlet of the air compressor main body communicates with an inlet of an intercooler, the intercooler is arranged above the air compressor main body, and the air flow meter and the temperature and pressure sensor are arranged on the air compressor main body. An outlet of the intercooler and the air inlet are located on the same side, and a temperature sensor is arranged in the intercooler. The intercooler, the flow meter, the temperature and pressure sensor and the air compressor are integrated into a whole, so that the space occupied by an air pipeline in a system is greatly reduced, and the complexity of a special-shaped rubber pipe is reduced.

The utility model relates to the technical field of engine control, in particular to an air flow meter signal delay compensation device for the transient air-fuel ratio of an engine. Comprising a data acquisition device which comprises sensors arranged in N sections of gas inlet pipes from the gas inlet front end of an engine to a gas inlet valve of the engine and is used for acquiring gas parameters in the multiple sections of gas inlet pipes; n is a positive integer; the delay calculation device is connected with the data acquisition device and obtains total delay time based on the gas parameters; and the delay chip is connected with the delay calculation device and controllably superposes the total delay time to the air flow meter, and the air flow meter outputs delayed flow meter signals. Gas parameters of the multiple sections of gas inlet pipes are collected through the sensors, the time of gas passing through each section of gas inlet pipe is calculated, the total delay time between the gas inlet front end of the engine and the gas inlet valve of the engine is obtained, the total delay time is considered in engine transient control to coordinate the advance, and the overshoot risk in the prior art is avoided.

A pressure difference detection device, for a particulate collection filter, includes an upstream pressure sensor, a downstream pressure sensor, an air flow meter, a low-pass filter, a processed differential pressure value acquiring unit, an intake air amount correcting unit, and an actual differential pressure value acquiring unit.

The invention belongs to the technical field of fuel cell engines. The air system comprises an air compressor, an intercooler, a humidifier, an electric pile outlet air stop valve, an electric pile inlet air stop valve, a humidifier bypass valve, a fuel cell air inlet bypass valve, a back pressure valve, an air flow meter, an intercooler rear pressure sensor, an electric pile inlet pressure sensor and an electric pile inlet temperature sensor. The stack outlet temperature sensor, the sensor assembly for the bench test, the mass spectrometer for the bench test, the air inlet pipeline and the air outlet pipeline are detachable parts, and the sensor assembly for the bench test and the mass spectrometer for the bench test are used for the bench test and are detached after the test is finished. According to the invention, the detachable sensor assembly and the mass spectrometer are additionally arranged in the air system, and interlocking optimization is carried out by combining a bench test control method and a performance calculation result, so that the accuracy of a bench test result is ensured, the battery pack is protected, the calibration method has very important significance in the calibration process of the fuel cell engine, and the cost is saved.

In a method for controlling an internal combustion engine and a control device of an internal combustion engine according to the present invention, normally, an intake air volume (A1) directly measured by an air flow meter (19) is selected as the air volume to serve as the basis for air-fuel ratio control, but when in a transient state in a condition in which the opening area (St) of a throttle valve (14) is smaller than the opening area (Sn) of a negative pressure-generating valve (18), the air flow meter (19) is not relied upon and, for example, an intake air volume (A2) computed by estimation on the basis of the throttle opening ratio is selected as the air volume to serve as the basis for air-fuel ratio control. This suppresses a response delay in the detection of the intake air volume, making it possible to supply the intake air volume (A) in accordance with the engine torque (T) required by the internal combustion engine (1), and an improvement in the accuracy of air-fuel ratio control can be attained.

The invention relates to the technical field of prevention and removal of general cleaning or general dirt, in particular to a blockage clearing method for a pressure tap of an air flow meter, which is executed by a processor, connected with an electronic control system and used for executing a control command to be sent; the blowing element is connected with the control element and sends the control command to the control element to execute blowing; the monitoring system is connected with the distributed control system and at least monitors the electronic control system and the control elements; the feedback module is connected with the distributed control system and at least executes feedback of the electronic control system and the control elements. According to the invention, blockages at the pressure tapping of the air flow meter can be cleaned in time.

The invention relates to a preheating control method for an electric heating catalyst of an extended-range fuel gas hybrid heavy truck, which comprises the following steps of: if the current extended-range fuel gas hybrid heavy truck has a preheating requirement on the electric heating catalyst, acquiring a pressure value of a vehicle-mounted gas storage tank; if the pressure value of the vehicle-mounted air storage tank is larger than the preset pressure value, the target opening value of the opening valve is calculated according to the target air flow value and the pressure value of the vehicle-mounted air storage tank, the initial opening value of the opening valve is adjusted based on the target opening value, and according to the actual air flow value of the air flow meter and the target air flow value, the pressure value of the vehicle-mounted air storage tank is adjusted. And the current opening value of the opening valve is dynamically adjusted based on a preset PID control algorithm, so that the temperature of the three-way catalyst rises to the preset temperature. And the temperature of the three-way catalyst is raised to the preset temperature. Therefore, the problems of low temperature of the three-way catalytic converter, high pollutant emission and the like during frequent high-load starting after cold starting and long-time shutdown of the engine are solved, and preheating in advance is realized through the electric heater in the non-starting state of the engine.