46results about How to "Reduce air flow" patented technology

The invention belongs to the field of down, and particularly relates to a waterproof down manufacturing method which comprises the following steps: sequentially immersing down filaments into an oxalic acid solution and a mixed solution of oligomerized maleic acid and sodium hypophosphite, and then crosslinking to obtain crosslinked down filaments; and carrying out surface hydrophobic modification on the cross-linked down silk to obtain the waterproof down feather. According to the method disclosed by the invention, the down filaments with poor heat retention property are subjected to cross-linking polymerization, and the obtained down is high in filling power and strong in hydrophobicity and has a great practical prospect.

The invention provides a hybrid rice seed production female parent seed unloading device, a control method and a harvester. The hybrid rice seed production female parent seed unloading device comprises an upper right-angle impeller mounting pipe, a grain impurity rate monitoring device, an unloading outlet pipeline, a control device, a centrifugal fan, a ventilation pipe, a shaking plate device, a driving motor set, a grain tank, a high-position unloading barrel, a three-impeller device and a grain discharging device. The centrifugal fan, the ventilation pipe, the high-position grain unloading barrel, the upper right-angle impeller installation pipe and the grain unloading outlet pipeline are sequentially connected, a grain outlet is formed in the lower portion of the grain tank, the shaking plate device is installed in the grain outlet, one end of the grain discharging device is connected with the grain outlet, the other end of the grain discharging device is connected with the ventilation pipe, and an opening is formed in the connecting position of the grain discharging device and the ventilation pipe. The grain unloading efficiency can be remarkably improved, the grain unloading time is shortened, the whole machine operation efficiency is improved, and the grain unloading device can be used for harvesting rice seeds, rice, wheat, oilseed rape and soybeans and has wide applicability.

The utility model belongs to the technical field of metal powder processing, and discloses an air-cooled spheroidizing chamber for plasma spheroidizing powder, which comprises a spheroidizing cylinder, the spheroidizing cylinder is of a cylindrical structure with openings at the upper end and the lower end, the upper end of the spheroidizing cylinder is provided with a top cover, the center of the top cover is provided with a plasma torch mounting port, and the lower end of the spheroidizing cylinder is provided with a flange; the lower end of the spheroidizing cylinder and the center hole of the flange form a spheroidizing powder outlet; the spheroidizing cylinder, the top cover and the flange form a spheroidizing chamber cavity; a powder feeding pipe is arranged on the side wall of the spheroidizing cylinder and communicates with the spheroidizing chamber cavity. An air cooling channel branch is arranged in the side wall of the spheroidizing cylinder, an air inlet channel of the air cooling channel branch is connected to the output end of the air cooling mechanism, and the air cooling channel branch communicates with the spheroidizing chamber cavity through a plurality of air outlet channels; the multiple air outlet channels are arranged at intervals in the extending direction of the spheroidizing cylinder, and the airflow direction of the air outlet channels is consistent with the powder movement direction. The spheroidizing chamber solves the problems that an existing spheroidizing chamber is large in size and complex in structure.

This invention relates to a hyperbaric oxygen chamber system with adjustable oxygen concentration. The system includes a main unit and a chamber. The main unit comprises a main control module, an oxygen regulation module, and a pressure regulation module, all electrically connected to the main control module. The pressure regulation module includes a low-oxygen air regulation submodule and a pressure-maintaining air submodule. The pressure-maintaining air submodule includes a first air compressor, a pressure relief valve, and a first sensor. The oxygen regulation module includes a second air compressor, a separation valve, a molecular sieve tower, a flow-limiting valve, and a vacuum pump. The low-oxygen air regulation submodule includes a three-way valve and a one-way valve. This invention's adjustable oxygen concentration hyperbaric oxygen chamber system can reduce the production cost of hyperbaric oxygen chamber systems, improve the user experience, and allow the oxygen concentration within the chamber to be adjusted below that of air, thus expanding its application to low-oxygen training and testing environments.

The invention discloses a tuyere honeycomb guide plate structure and device suitable for uniform distribution of a wind field of large-breadth metal additive equipment, and relates to the technical field of metal 3D printing. The tuyere honeycomb flow guide plate structure comprises a tuyere honeycomb flow guide plate structure body, a third jet flow channel is arranged in the tuyere honeycomb flow guide plate structure body, the third jet flow channel is of a gradient caliber, and the third jet flow channel comprises a first jet flow channel, a fourth jet flow channel and a second jet flow channel. An air inlet is formed in the side end, close to one side, of the tuyere honeycomb guide plate structure body; air flow is introduced into the air blowing structure and rectified through the air opening honeycomb flow guide plate structures evenly distributed in the air field of the large-breadth metal additive equipment, air flow parallel to the front is obtained, the air suction structure sucks air after being externally connected with the draught fan, the air flow on the forming plane shows the uniform flow speed and the high average air flow strength, and the air flow in the forming plane is uniform in flow speed and high in average air flow strength. In this way, smoke dust at all positions in the machining process can be effectively removed.

The utility model relates to the technical field of blowers, in particular to a low-noise blower which comprises a shell and a fan, the shell comprises an air inlet, an air outlet and an air duct communicating the air inlet with the air outlet, the fan is arranged in the air duct, and an air gathering section and an air duct middle section communicating the air gathering section with the air outlet are arranged on the side, located at the air outlet end of the fan, of the air duct. At least part of the inner wall of the air gathering section inclines from the air inlet end of the air gathering section to the center axis of the air channel in the flowing direction of airflow in the air channel so as to guide airflow at the air outlet end of the fan to gather towards the middle section of the air channel. The air flow occupies the middle space near the central axis of the air duct, the situation that the middle air flow speed of the air duct is inconsistent with the peripheral air flow speed is avoided, part of peripheral high-speed air flow is prevented from entering the middle space to form turbulent flow, noise caused by middle air oscillation is eliminated, and the flow speed loss of the high-speed air flow is reduced.

This utility model relates to a control box and mattress capable of uniformly venting air. Existing airbags vent air naturally through the pressure difference with the external space, resulting in significant variations in flow rate. This utility model includes a housing, an air pump, and a main control unit. The air pump has an air intake port and an air inflation port. A secondary control unit is located between the main control unit and the air pump. The secondary control unit includes an air intake adjustment component and an air inflation adjustment component. The air intake port can be connected to the main control unit through the air intake adjustment component, and the air inflation port can be connected to the external space through the air inflation adjustment component. This allows the gas in the target space to be uniformly vented after passing through the air intake adjustment component and the air inflation adjustment component sequentially under the drive of the air pump. The secondary control unit is used to change the airflow direction, enabling the air pump to independently perform inflation and deflation operations on each target space. This effectively increases the airflow in the later stages of deflation, utilizing the power of the air pump to improve deflation efficiency and effect, while also effectively reducing the airflow in the early stages of deflation, lowering noise, and improving the user experience.

The utility model relates to the field of turbo-type dust blowing guns, in particular to a flow-controllable turbo-type dust blowing gun, which comprises an outer shell, a handheld handle, an adapter, an air collecting pipe and an adjusting cap, a turbo fan is arranged in the outer shell, the left end of the outer shell is fixedly connected with the handheld handle, an air outlet pipe is arranged at the right end of the surface of the outer shell, and the air outlet pipe is connected with the adapter. The air outlet pipe is fixedly connected with the adapter, an air collecting pipe is fixedly installed at the end, away from the air outlet pipe, of the adapter, and an adjusting cap is installed at the end, away from the adapter, of the air collecting pipe; high-pressure airflow is increased through the turbofan and blown out through the air collecting pipe, dust blowing is achieved, when the airflow passes through the adapting base, personnel adjust the position of the sealing sleeve to enable the air leakage hole to be exposed, so that the airflow passing through the air leakage hole is reduced, the flow can be controlled, and meanwhile when the airflow is blown out, the adjusting cap is rotated to enable the airflow to pass through the adapting base. The positions of the air outlet holes are changed, the air outlet holes and the through holes are staggered, the inner diameters of the air outlet holes are changed, the air outlet flow is reduced, and practicability is improved.

The utility model provides a low-energy-consumption solid-liquid separation device which comprises a material extruding mechanism, a material conveying mechanism, a material conveying mechanism and a material conveying mechanism, the material extruding mechanism comprises a material extruding channel which is vertically arranged and used for inputting mixed liquid containing liquid and solid materials, the side wall of the material extruding channel is provided with a filtrate layer used for filtering liquid, and an extruding piece which is driven by a material extruding driving device to extrude the materials is arranged in the material extruding channel; the discharging mechanism is connected to the bottom of the extruding mechanism, a discharging cavity communicating with the extruding channel is formed in the discharging mechanism, and the peripheral end of the discharging cavity extends outwards to communicate with the outer wall of the discharging mechanism and is detachably provided with a plurality of sealing pieces driven by a discharging driving device in a sealed mode; the upper side and the lower side of the discharging cavity are each provided with a plurality of liquid pumping holes communicating with the discharging cavity and the corresponding pumping device. The stroke of the solid materials extruded out of the extrusion channel is prolonged through the discharging cavity, so that the extrusion channel is vertically arranged, the extrusion speed is increased under the self-weight action of the solid materials, and the extrusion mode that the burden of the extrusion driving device is reduced is achieved.

The utility model relates to the technical field of air quality detection, and discloses a forest health environment quality detection device which comprises a box body, a detection module positioned in the box body and a plurality of groups of air inlet assemblies mounted on the box body, and the plurality of groups of air inlet assemblies are mounted on the side wall of the box body; the air inlet assembly comprises an air inlet pipe and an air inlet fan, the air inlet pipe is provided with a front pipe section located at the front end, a rear pipe section located at the rear end and a middle pipe section connecting the front pipe section and the rear pipe section, the middle pipe section is provided with a downward concave part facing the ground, a drainage pipe section is formed on the bottom face of the downward concave part, and a water filtering piece is arranged at the lower end of the drainage pipe section. The water filtering piece comprises a water filtering film and a mounting ring, the mounting ring is detachably connected with the drainage pipe section, and the water filtering film is in contact with the end part of the drainage pipe section; the inner diameter of the drainage pipe section is equal to that of the middle pipe section; the air inlet fan is installed in the rear pipe section, and a port of the rear pipe section is communicated with the detection module. The purpose of the utility model is to effectively prevent water from entering the box body to damage internal electronic components.

The invention relates to the technical field of life electric appliances, and provides an electric hair dryer and a control method and device of the electric hair dryer. The electric hair dryer comprises a shell, an electric fan assembly, an electric heating assembly, a circuit board, a state detection assembly, a filter screen blockage prompting assembly and a filter screen; the shell is provided with an air inlet and an air outlet, the electric fan assembly, the electric heating assembly and the circuit board are arranged in the shell, and the electric fan assembly and the electric heating assembly are both electrically connected to the circuit board; the filter screen is arranged at the air inlet, the state detection assembly is arranged in the shell, the state detection assembly is electrically connected to the circuit board, and the state detection assembly is used for detecting real-time operation parameters of the electric hair dryer; the filter screen blocking prompting assembly is electrically connected to the circuit board. When the filter screen is in the blocked state, the filter screen blocking prompt assembly sends out prompt information to remind a user to replace or clean the filter screen in time, high-temperature fire of a circuit or an electronic element caused by blocking of the filter screen is avoided, and the safety of the electric hair drier is improved.

The utility model discloses a system for preparing an ultra-thick absorption core, the system is used for blowing by arranging a pipe fitting in a demolding area of a partition mechanism arranged in a forming drum in the demolding process of the absorption core, and the size of an air outlet of the pipe fitting in the flow direction is at least larger than the width of the absorption core. Air flow per unit area is reduced by increasing the sectional area of the pipe fitting, so that the risk that the absorption core body is blown away by instantaneous air flow in the demolding process is reduced.

The utility model belongs to the field of earphone microphones, and particularly relates to an earphone microphone wind noise prevention structure, which comprises a structure main body and a microphone, a first channel and a second channel are arranged in the structure main body, two ends of the first channel respectively penetrate through the structure main body to form an air flow inlet and an air flow outlet, and the microphone is arranged in the first channel. One end of the second channel is communicated with the first channel, the microphone is fixedly arranged in the structure main body, and the microphone corresponds to the other end of the second channel. According to the utility model, external airflow enters from the airflow inlet of the first channel, one part of the external airflow enters the second channel and flows into the microphone, and the other part of the external airflow is discharged from the airflow outlet of the first channel, so that the airflow quantity is greatly reduced through the design of the first channel, and meanwhile, the airflow is prevented from directly blowing a sound receiving hole of the microphone through the second channel; the design of the wind noise prevention structure can effectively suppress the influence of wind noise on the microphone, so that the sound signal pickup performance of the microphone is better.

The microwave oven comprises a supporting piece, an air duct shell, a flow dividing piece and a flow dividing valve, the air duct shell is connected to the supporting piece, an air duct is formed between the air duct shell and the supporting piece, and an air outlet communicated with the outside is formed in the first end of the air duct; the flow dividing piece is arranged in the air duct, located on the inner side of the air outlet and comprises a flow dividing supporting part, a flow dividing opening is formed in the windward side of the flow dividing supporting part, and an air passing opening is formed in the supporting piece and communicates with the flow dividing opening; the diverter valve is connected to the diverter opening and used for controlling opening and closing of the diverter opening, when the diverter valve is opened, part of airflow output from the air duct sequentially passes through the diverter opening and the air passing opening to be conveyed to the inner side of the door body, the problem that condensation is formed on the door body in a microwave mode is avoided, and the cleaning burden of a user is relieved advantageously. In addition, the air flow directly output from the air outlet can be reduced, the safety of the outer side of the air outlet is improved, and the heat utilization rate is increased.

A low-resistance efficient cyclone dust collector comprises a shell, a lower conical hopper, an air inlet pipe and an exhaust pipe, the air inlet pipe is arranged on the upper portion of the side wall of the shell, the exhaust pipe is arranged in the center of the top face of the shell and extends into the shell, a grating exhaust device is arranged on the side wall of the exhaust pipe in the shell, an exhaust outlet is formed in the bottom of the exhaust pipe, and the lower conical hopper is arranged in the shell. A flow guide cone is arranged in the shell, and an ash discharge port is formed in the bottom of the lower cone hopper. According to the utility model, the grid exhaust device is arranged on the exhaust pipe, so that a part of flue gas is exhausted from the side part through the grid exhaust device, the flue gas speed is reduced, the flue gas resistance is reduced, and the flue gas is guided through the flue gas guide cone, so that the flue dust separation is realized, and the dust removal efficiency is improved.

The invention discloses a load lock cavity vacuumizing method, and relates to the technical field of semiconductor manufacturing, and the method comprises the steps: before a load lock cavity body prepares to open a stop valve, a time relay is started, and a normally closed air valve is triggered; in the primary extraction process, the normally closed gas valve is opened, so that gas enters the primary extraction gas valve through the first auxiliary gas pipeline; the primary extraction valve introduces gas into the load lock cavity body, primary vacuumizing treatment is carried out, and airflow flowing in the load lock cavity body is reduced. Through the sequential control of the initial extraction valve and the normally closed valve, the load lock cavity is primarily vacuumized before the stop valve is opened, the pressure difference between the cavity and a preceding-stage vacuum pipeline is reduced, the airflow flowing in the cavity when the stop valve is opened is reduced, the cavity environment is relatively stable, and particles in the cavity cannot contaminate a wafer along with the airflow flowing. Therefore, particles on the wafer are reduced, the problem that the concentration of the particles on the wafer is too high after the load lock cavity is vacuumized is solved, and the concentration of the particles on the wafer can be reduced after the load lock cavity is vacuumized.

The utility model discloses a kind of warm knitted grey cloth, it relates to textile field, and its technical scheme main point is: including outer layer and inner layer, the side of inner layer close to outer layer is equipped with a plurality of nap, the side of outer layer close to inner layer has a plurality of convex edges linear array, the distance between adjacent convex edges is greater than or equal to the width of convex edge, inner layer and outer layer are stitched by stitching line, stitching line passes through convex edge.In the utility model, the distance between outer layer and inner layer is separated by convex edge, cooperate the stiffness of first yarn, ensure that the nap between adjacent convex edges can keep standing, delay the air flow between outer layer and inner layer, form air layer, and then reduce heat exchange, keep warm by nap and air layer, ensure that knitted grey cloth is fluffy soft, first yarn is twisted by polyester fiber silk, polyester fiber silk has good stiffness, second yarn is twisted by hollow special-shaped polyester fiber silk, cooperate the diameter of second yarn, improve the warmth of inner layer.

The invention relates to an air conditioner control method, an air conditioner, air conditioner control equipment and a storage medium, and the method comprises the steps that target parameters are obtained, and the target parameters comprise the air suction temperature and / or air suction pressure on an air suction pipeline of the air conditioner; under the condition that it is determined that the air conditioner has the liquid impact risk based on the target parameters, the opening degree of an electronic expansion valve is reduced so that wet steam entering a compressor can be reduced, and an electromagnetic regulating valve is opened so that the wet steam can enter a crankcase through a bypass branch; and the operation frequency of a compressor in the air conditioner is reduced, and an electric heating element of the gas-liquid separator is controlled for heating. By means of the gas-liquid separator, the problem that in the prior art, only a gas-liquid separator is adopted for reducing liquid backflow, and the effect of reducing the liquid impact risk is poor is solved.

The embodiment of the invention provides a control method and device of a cleaning system, a storage medium and a program product. The method comprises the following steps: responding to a dust collection instruction of the cleaning system; a dust collection fan and a main machine fan are controlled to be started; wherein the power of the dust collection fan is greater than that of the host fan; the driving assembly is controlled to drive the dust blocking module to move relative to the box body to change the opening proportion of the dust inlet so as to change the air inlet flow and the air speed of the dust inlet. Therefore, when the cleaning system collects dust, the opening proportion of the dust inlet is changed, garbage residues are reduced, and the cleaning effect on the box body is improved.

The utility model provides a discharge mechanism for a solid-liquid separation device, which comprises a discharge seat, a discharge cavity communicated with the lower end of a material extrusion channel is arranged in the discharge seat, the peripheral end part of the discharge cavity extends outwards to be communicated with the outer wall of the discharge seat and is detachably provided with a plurality of sealing parts driven by a discharge driving device in a sealing manner, and the discharge driving device drives the discharge driving device to rotate. The upper side and the lower side of the discharging cavity are each provided with a plurality of liquid pumping holes communicating with the discharging cavity and the corresponding pumping device. The solid materials in the extrusion channel are discharged to the discharging cavity, the suction device sucks liquid carried by the solid materials in the discharging cavity through the liquid suction holes, and the discharging driving device drives the sealing pieces to be separated from the peripheral end so that the solid materials can be discharged. The stroke of the solid materials extruded out of the extrusion channel is prolonged through the discharging cavity, so that the extrusion channel is vertically arranged, the extrusion speed is increased under the self-weight action of the solid materials, and the extrusion mode that the burden of the extrusion driving device is reduced is achieved.

According to the fire monitor fire extinguishing system detection part double-pipeline parallel fire monitoring system and the detection method thereof, two partition plates are arranged in a shell side by side, a detection cavity is formed between the two partition plates, a detector is installed in the detection cavity, an air inlet hole A is formed in one end of an airflow cavity A, and an air outlet hole A is formed in the other end of the airflow cavity A; an air outlet hole B is formed in the other end of the airflow cavity B; a first detection inlet is formed in the first partition plate close to the first air outlet hole, a second detection inlet is formed in the second partition plate close to the second air outlet hole, a detection outlet is formed in the end of the detection cavity, the filter is installed in the detection cavity between the detection inlet and the detector, and a first splitter plate covering the first sample inlet is arranged on the end plate on the inner side of the first air outlet hole in the longitudinal direction. A splitter plate B covering the sample inlet B is arranged on the end plate on the inner side of the air outlet hole B along the longitudinal direction; according to the monitoring system, the sensitivity of the detection device can be improved, the detection monitoring effect is ensured, the difficulty of manual fire investigation and the troubleshooting speed can be effectively reduced, and the fire occurrence point can be confirmed in time.

The utility model discloses a mute tire and a tire mold, and aims to solve the problem that the noise of the conventional tire is high during running. The tire comprises a tread part and a sidewall part, the sidewall part is provided with a groove, a pattern unit in the groove comprises a plurality of linear structures, and at least part of the pattern unit is a deformation part. When the tire runs, the deformation parts deform to shield partial gaps between the adjacent linear structures, airflow entering is reduced, and air friction noise is lowered. The top end of the linear structure is a deformation part, the outer surfaces can be located on the same plane during deformation, the section of the linear structure is triangular or trapezoidal, the included angle is 20-45 degrees, the height difference between the top end and the bottom face of the groove is 0.15-0.6 mm, the adjacent gap is 0.1-0.5 mm, and the line type can be a straight line, a broken line or an arc line. The tire mold is provided with protruding modules and textures and is used for forming grooves and pattern units. According to the scheme, noise is effectively reduced while the tire performance is guaranteed.

A primary and secondary channel airflow guiding device for detecting particulate matters of a detection part of a fire monitor fire extinguishing system is characterized in that an end plate A at one end of a shell is provided with an air inlet hole, a suction fan is mounted at the air inlet hole, and an end plate B at the other end of the shell is provided with an exhaust hole; a longitudinal partition plate is arranged in the shell, the particulate matter detector is installed in a detection cavity formed between the longitudinal partition plate and one side plate of the shell, an air outlet corresponding to the detection cavity in position is formed in the first end plate, an air inlet is formed in the longitudinal partition plate close to one end of the second end plate, and a splitter plate covering the air inlet is arranged on the second end plate on one side of the exhaust hole; part of an air sample extracted by the device enters the detection cavity from the shunting channel, and most of the air sample is discharged from the exhaust hole, so that smooth flow of the air sample can be ensured while the air sample is normally detected, the situation that a protection area cannot be fully sampled due to the fact that suction force at the sampling pipe is weakened is avoided, and air flow at the filter can be effectively reduced; short-time blockage is avoided, and continuous and stable operation of the detection device is facilitated.

A gas particulate matter detection device for a fire monitor fire extinguishing system detection part is characterized in that an end plate A at one end of a shell is provided with a gas inlet hole, a suction fan is mounted at the gas inlet hole, and an end plate B at the other end of the shell is provided with a gas outlet hole; a longitudinal partition plate is arranged in the shell, the particulate matter detector is installed in a detection cavity formed between the longitudinal partition plate and one side plate of the shell, an air outlet corresponding to the detection cavity in position is formed in the first end plate, an air inlet is formed in the longitudinal partition plate close to one end of the second end plate, and a splitter plate covering the air inlet is arranged on the second end plate on one side of the exhaust hole; part of an air sample extracted by the device enters the detection cavity from the shunting channel, and most of the air sample is discharged from the exhaust hole, so that smooth flow of the air sample can be ensured while the air sample is normally detected, the situation that a protection area cannot be fully sampled due to the fact that suction force at the sampling pipe is weakened is avoided, and air flow at the filter can be effectively reduced; short-time blockage is avoided, and continuous and stable operation of the detection device is facilitated.

The utility model belongs to the technical field of respiratory apparatus, specifically relates to an oral cavity pasting formula breathing pipe, including the mutual connection of mouth bite device and pharyngeal cavity air duct, wherein, mouth bite device includes front end mouth, lip stop, tooth socket pipe and tooth stop, and front end mouth and lip stop are connected, and front end mouth and lip stop are connected, and lip stop is oval thin ring, and tooth stop is irregular oval ring, and lip stop and tooth stop are connected through tooth socket pipe, and tooth stop is arranged in the front end of pharyngeal cavity air duct, and front end mouth, tooth socket pipe and pharyngeal cavity air duct are all partial oval pipe body structure, and the front end surface of tooth stop, tooth socket pipe and the rear end surface of lip stop constitute tooth socket, and mouth bite device and pharyngeal cavity air duct are integrally formed.The utility model reduces even eliminates the symptom generation of lip part chapped, tongue front area mucous membrane dry and oral cavity ulcer, reduces the number of night awakening, alleviates snore frequency, improves sleep quality and daytime work efficiency, has the effective prevention of oral cavity pasting formula breathing pipe frequent drop out of the body, and can improve the comfort of wearing.

The invention relates to the technical field of aluminum profile machining, in particular to an intelligent aluminum profile machining production line which comprises a multi-head traction device, a machining table, a welding device and a welding head and further comprises a first adjusting plate. The first adjusting plate is used for adjusting the gas flow when the protective gas is jetted according to the thickness of the aluminum profile to be welded; and the second adjusting plate is located on the welding device, and the second adjusting plate is used for adjusting the gas flow when the protective gas is jetted according to the welding time of the aluminum profile, when the intelligent aluminum profile machining production line is used, different from the prior art, in the welding process of the aluminum profile, the welding time of the aluminum profile is shortened, and the production efficiency is improved. The main function of the protective gas is to prevent the welding seam from being polluted by oxygen and other impurities in the air, and the welding seam area can be always covered by enough gas by accurately adjusting the gas flow, so that the risks of oxidation and pollution are reduced, and the purity and quality of the welding seam are ensured.

The present invention discloses an automatic cooking machine humidity measuring device, an automatic cooking machine and a humidity control method. The automatic cooking machine humidity measuring device comprises a humidity sensor arranged in an air intake passage and a control component electrically connected to the humidity sensor, wherein the control component is used to calculate the humidity in the cooking cavity for multiple times, and each time the humidity in the cooking cavity is calculated, the calculation is performed based on the humidity in the cooking cavity calculated last time combined with the real-time humidity measured by the humidity sensor. The humidity in the cooking cavity is indirectly measured by the humidity sensor arranged in the air intake passage. Since the air intake passage is outside the cooking cavity and has a relatively low temperature, and is not in the high temperature environment in the cooking cavity for a long time, an ordinary humidity sensor can be used, which reduces the cost and solves the defect that the humidity sensor in the existing solution cannot work for a long time under high temperature.

The invention belongs to the related field of fuel cell technology, and discloses an air-cooled fuel cell cathode plate for enhancing heat and mass transfer and moisturizing effects, which comprises a cathode flow field, a main cooling flow field and an auxiliary cooling flow field, wherein a first channel comprising a plurality of air flow channels, a second channel comprising a plurality of main cooling flow channels and a third channel comprising at least one auxiliary cooling flow channel are sequentially arranged, and the third channel is designed to occupy a part of the sectional area of the first channel in the direction perpendicular to the air flowing direction; in addition, at least one turbulent flow structure is arranged in each of the first channel and the third channel. The invention further discloses a corresponding method. According to the air-cooled fuel cell, the technical problems that the existing air-cooled fuel cell is insufficient in heat dissipation capability, low in mass transfer performance and too fast in water loss of the membrane electrode to cause a dry membrane phenomenon and the like can be solved at the same time, and the power generation efficiency and the operation stability of the air-cooled fuel cell are correspondingly and effectively improved.

The utility model relates to the technical field of range hoods, and provides a noise reduction structure and a lifting range hood. The noise reduction structure comprises an assembly substrate and a cushion pad. The assembling base plate is installed in a gap between the fan frame and the lower box body and is provided with a plurality of first airflow channels arranged at intervals in the first direction, and each first airflow channel is provided with an air inlet and an air outlet which are opposite in the second direction and arranged at intervals. The buffer pad covers the air outlets of the first airflow channels, the buffer pad is provided with a plurality of second airflow channels arranged at intervals, and the second airflow channels communicate with the corresponding first airflow channels. According to the noise reduction structure, on the basis that noise reduction is guaranteed, the dust and grease accumulation risk is reduced, cleaning is convenient, the air flow flowing through the gap is reduced, and the oil smoke suction performance is guaranteed.