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69results about How to "Reduce the air flow rate" patented technology
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Wet method dedusting system of centrifugal axial flow-type vacuum pump and corresponding dust collector and floor cleaning machine
ActiveCN101639074AIncrease the cross-sectional areaEasy to collect dustCarpet cleanersPump componentsLow noiseProduct gas
The invention provides a wet method dedusting system of a centrifugal axial flow-type vacuum pump and a dust collector and a floor cleaning machine using the system. The invention designs a centrifugal axial flow-type vacuum pump which exhausts along the axial direction of the pump shell and has low noise, and a special speed reduction barrel is arranged in the pump shell. The invention also designs a special wet method dedusting flow which is applicable to industrial dedusting and civilian-used dust collector at the same time and can lead the dust containing amount in exhausted gas to be zeroor near zero, the work flow is subsequent to the flow of removing crude dust such as hop-pocket dedusting and the like, and air current can pass through plastic foam for three time to achieve the purpose of completely purifying on the condition of fully wetting with water. In The invention uses the principle and the equipment of the dedusting system to design a wet method dust collector, and improve and perfect the vacuum floor cleaning machine.
Owner:胡宁成
Steam exhaust device, electric pressure cooker and exhaust control method
The invention relates to a steam exhaust device, an electric pressure cooker and an exhaust control method. The steam exhaust device comprises an exhaust assembly which consists of an on-off mechanism and an exhaust column; the exhaust column is equipped with a first exhaust hole and a second exhaust hole, wherein the first exhaust hole is communicated with a high pressure cavity in a vessel, and while the second exhaust hole is communicated with the outside; the on-off mechanism is arranged at one side of the exhaust column and can switch the on and off states; when in the on state, the on-off mechanism can form a cavity with the exhaust column, and the first exhaust hole can be communicated with the second exhaust hole through the cavity so as to guide the high pressure cavity in the vessel to exhaust steam to the outside, and a first exhaust channel can also be formed; when in the off state, the communication mechanism can separate the first exhaust hole from the second exhaust hole, so as to stop the high pressure cavity in the vessel exhausting steam to the outside. With the adoption of the steam exhaust device and the exhaust control method, the exhaust-caused noise can be reduced, and the risk of steam leakage can be decreased.
Owner:GREE ELECTRIC APPLIANCES INC
Drying constant-temperature test box
InactiveCN103908981AGood technical effectHeating evenlyHeating or cooling apparatusEnclosures/chambersTemperature controlAir velocity
The invention relates to a laboratorial culture tank and discloses a drying constant-temperature test box. The drying constant-temperature test box comprises an insulating layer, a constant-temperature air circulating device and a front door, wherein the insulating layer and the front door form a closed constant-temperature inner cavity; the constant-temperature air circulating device comprises a motor, a wind wheel and a circulating air duct; the motor drives the wind wheel to rotate, the circulating air duct comprises an air exhausting duct and an air inlet duct, one end of the air exhausting duct is connected with an air outlet of the wind wheel, the other end of the air exhausting duct is communicated with the constant-temperature inner cavity, the air exhausting duct comprises an air duct cover plate arranged above the wind wheel, one or more exhausting holes are formed in the air duct cover plate, an air velocity sensor is arranged between the air duct cover plate and a draught fan, a heating device is arranged on the inner side, close to the air inlet duct, of a first exhausting hole, and a temperature sensor is arranged between the first exhausting hole and the heating device. The drying constant-temperature test box has the advantages that stable hot air circulation can be realized in the constant-temperature inner cavity, and the test box can be uniformly heated, is good in temperature control effect and high in precision and has a high application value.
Owner:XUTEMP TEMPTECH
Airflow direct connection wall hanging type fresh air ventilator
PendingCN107449095AReduce noiseReduce noise valueLighting and heating apparatusNoise suppressionAir volumeFresh air
The invention relates to a fresh air ventilator, in particular to an airflow direct connection wall hanging type fresh air ventilator, and belongs to the field of indoor ventilation and aeration equipment. The airflow direct connection wall hanging type fresh air ventilator comprises a power-assisted fan component, a main fan assembly and an external filtering layer, and the power-assisted fan component is buried in a wall hole of a room outer wall; the main fan assembly comprises an internal machine shell body installed at the inner side face of the room outer wall, a main fan and a fresh air outlet with an outlet valve, the main fan and the fresh air outlet are arranged in the internal machine shell body in the air supplying direction in sequence, a fresh air inlet connected with the air outlet end of the power-assisted fan component is formed in the back face of the internal machine shell body, and the impeller rotary plane of the main fan is parallel to the room outer wall. Compared with the prior art, the airflow path in front of a main fan inlet is directly connected, the airflow in front of a main fan outlet is directly connected to an indoor room, the airflow path is directly connected and free of a redundancy process, many technological measures for eliminating and reducing noise by arranging two fans, the hollow machine shell, the main fan on at the rear portion of the filtering layer and the like are mainly adopted, and the effects of small noise and a large air volume are achieved.
Owner:陈罡
Tunnel communication repeater
ActiveCN111083575AAvoid crossingAffect normal heat dissipationRadio transmissionSelection arrangementsRailway tunnelStructural engineering
The invention relates to a tunnel communication repeater. The tunnel communication repeater effectively solves the problem that dust in a tunnel is likely to enter a repeater due to high-speed airflowgenerated by a communication repeater installed in a railway tunnel when a high-speed train passes through the repeater. According to the technical scheme, when the high-speed train does not pass through the railway tunnel, the dustproof net can carry out preliminary protection on the repeater; when a train running at a high speed passes through the tunnel, the train running at the high speed drives air flow in the tunnel to move at the high speed, the positioning device is released by triggering the fan blades, the protective cover slides down to seal and protect the repeater, and dust is effectively prevented from penetrating through the dustproof net under the action of the air flow moving at the high speed.
Owner:UNIV FOR SCI & TECH ZHENGZHOU
Heat radiating device
InactiveCN101083889AImprove cooling effectReduce flow rateEnergy efficient ICTDigital data processing detailsEngineeringCentrifugal fan
The present invention is a kind of heat-scattered device, including a centrifugal fan and a radiating fin group located at outlet of the fan. The radiating fin group is composed of several parallel radiating fins. The centrifugal fan includes a rotor with several flabellate which is designed to bring a first tongue outlet and a second tongue outlet, of which the first tongue outlet is away from the radiating fin group, the second tongue outlet is located between the first tongue outlet and the outlet of fan. The first and second tongue outlets can induce the airflow caused by the centrifugal fan parallel to the radiating fin group and reduce the energy loss caused by collision of airflow and radiating fin group, thus the airflow velocity will not obviously decreased, and will be easier to get through the surface of radiating fin group, and the radiating effect of the heat-scattered device can be improved.
Owner:FU ZHUN PRECISION IND SHENZHEN +1
Cyclone water-powder-air separator
InactiveCN102228872AEfficient separationAchieve the effect of recyclingReversed direction vortexEngineeringDistributor
The invention discloses a cyclone water-powder-air separator. The separator comprises: a cylindrical outer cylinder; an air discharging port, a liquid discharging port, an air inlet port and a powder discharging port arranged on the cylinder; a swirl eliminating plate, a lower separating plate, a material collecting arc plate, a middle separating plate and an upper separating plate arranged in a chamber formed by the cylinder; a cone-shaped inner cylinder respectively connected to a lower separating plate central hole, a material collecting arc plate central hole and a middle separating plate central hole, wherein the cone-shaped inner cylinder is arranged above the swirl eliminating plate, and an annular chamber is formed between the external wall of the cone-shaped inner cylinder and the internal wall of the cylindrical outer cylinder; four reversed-cone-shaped cyclone separator and a round distributor with an X-shaped flow deflector arranged between and communicate with the middle separating plate and the upper separating plate; a secondary condensing plate arranged on the bottom of the X-shaped flow deflector; and an air discharging pipe arranged on the center of each reversed-cone-shaped cyclone separator, wherein the four air discharging pipes communicate with the upper separating plate. The invention is suitable for the separating of water-powder-air mixtures, and the separation efficiency of the separator is high.
Owner:JIANGSU UNIV OF SCI & TECH
Gas fireplace and flow guide member of the same
InactiveUS20170009998A1Improve performanceReduce the temperatureDomestic stoves or rangesGaseous fuel burnerCold airCombustion chamber
A gas fireplace includes a firebox, a translucent cover provided on the firebox, and a separate assembly. The separate assembly is provided in the firebox, and divides the firebox into an air chamber and a combustion chamber which corresponds to the translucent cover. An exhaust passage is formed between the separate assembly and the translucent cover, and communicates the air chamber and the combustion chamber, wherein an inner width of the exhaust passage gradually reduces from the air chamber toward the combustion chamber. During the combustion, the exhaust passage guides cold air to flow through the semi-enclosed air chamber, and to evenly blow into the translucent cover, which forms an even air curtain on a surface of a bottom portion of the translucent cover to block out the heat. Whereby, the temperature of the translucent cover and the bottom portion of the combustion chamber could be lowered.
Owner:BAHUTONG ENTERPRISE LTD
Experimental spray dryer for environment-friendly chemical production
InactiveCN111974012AAchieve rotational jettingFull impact contactGranulation by liquid drop formationEvaporation by sprayingThermodynamicsEngineering
The invention relates to the technical field of spray dryers, in particular to an experimental spray dryer for environment-friendly chemical production. The experimental spray dryer comprises a dryerbody, wherein a feeding hole is formed in the upper end of the dryer body; a discharge hole is formed in the lower end surface of the dryer body; an air outlet is formed in the right lower end of thedryer body; and an inner cavity of the dryer body is arranged to be a drying inner cavity. The experimental spray dryer has the beneficial effects that through cooperation of a gear and a gear ring, rotary jetting of hot air flow is achieved, so that hot air makes full impact contact with atomized liquid, the drying efficiency is greatly improved, and meanwhile, the flow of the hot air is guaranteed through impact between a spring and the pressure intensity of air inlet flow; by arranging transverse through holes and a buffering inner cavity, buffering of the airflow velocity is achieved, theimpact direction is vertical, the airflow is sprayed out of the spray head in an overflow mode, impact on the atomized liquid is reduced, the contact time is prolonged, and the heating and drying efficiency is further improved in cooperation with an arc-shaped heat conduction plate.
Owner:南昌升升科技有限公司
Three-level rotational flow structure of afterburner head
InactiveCN106678870AReduce the air flow rateStable combustionContinuous combustion chamberThree levelFuel oil
The invention provides a three-level rotational flow structure of an afterburner head. A large-ranged recirculation zone can be generated by the structure in an afterburner, so that flame burning is stabilized, and meanwhile, the pressure loss can be reduced, the fuel oil atomization degree in the afterburner is reinforced, burning efficiency is improved, and the wall face can be effectively cooled; by reasonably setting the rotary angle of a whole flow supporting plate, an airflow reversely flows in a rotational-flow mode, so that shear force between fuel oil and air is increased, and the fuel oil atomization degree is improved; the flowing direction of the airflow is not suddenly changed, and thus flowing resistance is small; and an airflow rotational flow is subjected to wall-adherent movement, so that an air film is formed between the afterburner wall face and a burning zone, and the cooling effect of the afterburner wall face is guaranteed. The three-level rotational flow structure of the afterburner head has the advantages that the difficulty, caused by the over-high airflow speed in the afterburner, of igniting and maintaining stable burning of flame can be effectively improved, and the smaller pressure loss is achieved; and meanwhile, the fuel oil atomization level can be improved, and further efficient burning can be ensured.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Heat-dissipation-type electrical control box
InactiveCN108391408AReduce the air flow rateReduce noiseCooling/ventilation/heating modificationsSoftware engineeringElectrical control
The invention discloses a heat-dissipation-type electrical control box, and belongs to the technical field of computer accessories. In order to solve the problems of unsatisfactory heat dissipation effect and excessively loud noise during heat dissipation in the prior art, the heat-dissipation-type electrical control box comprises a shell and is characterized in that a heat dissipation block is fixedly connected to the bottom of the shell and penetrates through the bottom of the shell, and a heat dissipation pipe is communicated with one side surface of the heat dissipation block; on end of the heat dissipation pipe is provided with a support plate, one side of the support plate is fixedly connected with the shell, and the upper portion of the support plate is provided with a water tank; one end of the heat dissipation pipe is communicated with one through hole in the bottom of the water tank, the bottom of the heat dissipation block is provided with an inner cavity, a support rod is fixedly connected with the inner bottom wall of the inner cavity, and an air suction fan is fixedly connected to the top of the support rod; a first heat dissipation fan is arranged in the heat dissipation pipe, a heat conduction block is arranged at one side of the first heat dissipation fan, and the other end of the heat conduction block is provided with a second heat dissipation fan.
Owner:HENAN CHANGMING HANGBIAO ELECTROMECHANICAL EQUIP CO LTD
Raw food material dust removing device
ActiveCN108636799AEasy to collectPrevent clogging and cloggingGas current separationFood materialEngineering
The invention relates to the technical field of planting, and discloses a raw food material dust removing device which comprises a storage tank and a discharging pipe, wherein the storage tank and thedischarging pipe communicate through discharging valves; a dust sucking pipe is arranged in the discharging pipe, and composed of an inlet section, a throat and a diffusion section from top to bottom; dust sucking holes are formed in the side wall of the throat; a piston is arranged in the inlet section; a fan which is rotationally connected with the dust sucking pipe and positioned in the inletsection is arranged below the piston and can only rotate in a one-way manner; a driving ring is arranged at the center of the fan; the fan and the driving ring are rotationally connected through a one-way bearing; a driving rod is fixed on the piston and penetrates through the driving ring; a spiral groove and a spiral rib which are mutually matched are arranged on the driving rod and the drivingring; air inlet holes which are positioned between the piston and the fan and communicate with the outside world are formed in the side wall of the inlet section; and air inlet one-way valves are arranged in the air inlet holes. By adoption of the raw food material dust removing device, dust in soybeans can be sucked out through the throat when the piston slides up and down and when the discharging pipe of a soybean tank falls off.
Owner:潍坊达美食品有限公司
Cloth bag electrostatic combined type environment-friendly dust remover
The invention discloses a cloth bag electrostatic combined type environment-friendly dust remover in the technical field of dust removers. The dust remover comprises an electrostatic box, a cloth bagbox and a pretreatment box, wherein the cloth bag box and the pretreatment box are both arranged on the right side of the electrostatic box; the cloth bag box is positioned on the upper side of the pretreatment box; an ash bucket is arranged on the lower side of the electrostatic box; an inclined ash bucket is arranged on the lower side of the cloth bag box. According to the dust remover, oppositeblowing pipelines are arranged so that the air flow entering the electrostatic box is divided into two oppositely-blowing air flows, after air flow opposite blowing, the gas flow rate is drasticallyreduced, the residence time in an electrostatic dust collection plate is prolonged, and electric precipitation effect is improved; the dust removal plate can be subjected to dust removal through an arranged sound wave vibration instrument, the sound wave vibration instrument can also act on the cloth bag, so that the spraying and blowing frequency is reduced; dust on the dust removal plate can befurther removed through an arranged impact dust removal mechanism, dust in the inclined ash bucket can be helped to slide down, and flue gas which is not purified thoroughly can be subjected to circulating purification through an arranged circulating pipeline.
Owner:ANHUI GUONENG YISHENG ENVIRONMENTAL PROTECTION SCI & TECH
Fan diffuser structure for dust collector
InactiveCN102793510AIncrease the space areaIncrease the bottom areaPump componentsSuction cleanersEddy currentEngineering
The invention discloses a fan diffuser structure for a dust collector. The fan diffuser structure comprises a body part with certain thickness and a certain area; a plurality of arc front guide blades are formed at the periphery of the lower side of the body part at certain intervals; a flow channel through which air is guided to flow is formed between two adjacent front guide blades; and a groove is formed on the bottom of each flow channel. The fan diffuser structure for the dust collector has the advantages that the groove is formed in the center of the bottom of the flow channel formed between the adjacent two front guide blades, and the areas of the cross sections of the grooves and the flow channels are gradually reduced from external openings to internal openings proportionably. After the air flow enters the flow channels, the spaces and the bottom areas of the flow channels are increased due to the grooves formed in the centers of the flow channels, so that the flow speed of the air flow in the middles is reduced, the difference of the flow speed in the middles and two sides of the flow channels is balanced, the air flow speed in the flow channels is distributed uniformly, eddy current can be reduced effectively, energy loss is reduced, and flowing efficiency is improved.
Owner:LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD
Atomizing cup
InactiveCN106964035AReduce wasteResidue reductionMedical devicesMedical atomisersEngineeringCompressed air
The invention discloses an atomizing cup which comprises a cup body. A first chamber is formed in one side inside the cup body, a second chamber is formed in the other side inside the cup body, the bottom of the first chamber is communicated with the bottom of the second chamber, the bottom of the first chamber is provided with a compressed air inlet, the top of the first chamber is provided with an outside air inlet, the first chamber is internally provided with an atomizing component communicated with the compressed air inlet, and the top of the second chamber is provided with an opening. Preferably, the atomizing cup further comprises a head cover arranged on the top of the cup body. Preferably, an opening is formed in the position, corresponding to the outside air inlet, of the head cover, and an atomized gas solution channel extending to the top is arranged on the position, corresponding to the opening of the top of the second chamber, of the head cover. An existing designed atomizing cup structure is improved, and waste and residues of liquid medicine are lowered to the maximum extent; furthermore, atomized particles are stable and uniform, and the noise is lowered.
Owner:苏州雾联医疗科技有限公司
Silencer and motorcycle with same
ActiveCN108643989AReduce noiseReduce the air flow rateSilencing apparatusMachines/enginesEngineeringMuffler
The invention discloses a silencer and a motorcycle with the silencer. The silencer comprises a shell, an air inlet pipe, an air outlet pipe and a plurality of speed reducing devices, wherein a frontcover is arranged at the front end of the shell, a rear cover is arranged at the rear end of the shell, a baffle is arranged in an inner cavity of the shell, the inner cavity of the shell is divided into a front cavity and a rear cavity by the baffle, and the front cavity and the rear cavity communicate with each other through a plurality of vent holes located in the baffle; the air inlet pipe isarranged on the front cover, and the outside part communicates with the front cavity through the air inlet pipe; the air outlet pipe is arranged on the rear cover, and the outside part communicates with the rear cavity through the air outlet pipe; and the speed reducing devices are arranged on one side of the baffle, the speed reducing devices are located in the rear cavity, and the speed reducingdevices communicate with the corresponding vent holes in the baffle. Due to the adoption of the above structure, when the tail gas of the motorcycle flows in the speed reducing devices, all components in the speed reducing devices are used for blocking the tail gas, so that the flow velocity of the gas flow is reduced, and the noise which is generated in the emission process of the tail gas is further reduced.
Owner:江门松铃机车有限公司
Exhaust silencer
ActiveCN105863785AImprove the noise reduction effectReduce the air flow rateExhaust apparatusSilencing apparatusPulp and paper industryMuffler
The invention discloses an exhaust silencer. The exhaust silencer comprises a barrel body, wherein an air inlet pipe is connected onto the first side of the axial direction of the barrel body; an air outlet pipe is connected to the second side of the axial direction of the barrel body; at least one air stream baffle unit which is used for baffling air streams so as to reach a silencing effect is sequentially arranged in the inner cavity of the barrel body from the first side to the second side axially; each air stream baffle unit comprises a first supporting clapboard, a second supporting clapboard and a middle cavity which is formed between the first supporting clapboard and the second supporting clapboard; a perforated pipe which is through in two ends penetrates through the central parts of the first supporting clapboard and the second supporting clapboard; and at least one communication pipe which is through in two ends penetrates through the first supporting clapboard around the perforated pipe. According to the exhaust silencer, air streams are baffled through the air stream baffle units; and meanwhile, air stream speed and exhaust back pressure are lowered, so that the silencing effect of the silencer is further improved.
Owner:浙江创格科技股份有限公司
Low-noise and efficient cooling axial flow fan of central air conditioner outdoor unit
ActiveCN103629156AImprove efficiencyControl Radial Pressure GradientPump componentsPumpsLow noiseRotational axis
The invention discloses a low-noise and efficient cooling axial flow fan of a central air conditioner outdoor unit. The low-noise and efficient cooling axial flow fan comprises an air duct, a motor support, a motor, a hub a plurality of blades which are fixed on the hub, wherein the motor support is arranged above the air duct, the motor is arranged at the center of the motor support, and the hub is connected with a motor rotary shaft. The hub comprises a hub inner lining panel and a shaft sleeve which is connected to the center of the hub inner lining panel in a welded mode; the shaft sleeve is matched with the motor rotary shaft; the periphery of the hub inner lining panel extends to form a plurality of hub connection boards which are evenly distributed with the shaft sleeve as the center; each hub connection board is provided with a plurality of thread hole; each hub connection board is twisted in the reverse direction from the two side edges of the primary portion where the hub inner lining panel extends. The low-noise and efficient cooling axial flow fan of the central air conditioner outdoor unit lowers vortex loss of the wall surface by decreasing the hub ratio, and decreases flowing speed of air flow, thereby effectively lowering noises caused by the air flow.
Owner:ZHE JIANG YILIDA VENTILATOR CO LTD
Noise-reduction range hood of double air intake structure
ActiveCN107990394AEliminate reverberation noiseReduce flow rateDomestic stoves or rangesLighting and heating apparatusCurrent distributionKitchen utensils
The invention relates to the technical field of kitchen utensils, and particularly relates to a noise-reduction range hood of a double air intake structure. The range hood provided by the invention comprises a box body component, a flow guide plate, a fan component and a silencing component, wherein the fan component comprises a volute; the volute is provided with a first air intake passage, a second air intake passage and an air outtake passage; the flow guide plate is mounted on the box body component; further, the flow guide plate is provided with a wind inlet. An air current entering the box body component from the wind inlet is dispersed into two ways, that is, passes through the first air intake passage and the second air intake passage respectively and then passes through the air outtake passage to flow out; a current distribution effect is good; noise is effectively reduced; meanwhile, lower flow speeds of the air currents on two sides, which are caused as the air current is centralized, are also avoided; smoke gathering areas on left and right sides in the box body component are expanded; an oil and smoke suction effect is improved; the silencing component is arranged, corresponding to the first air intake passage of the volute, in the box body component, so as to be capable of eliminating noise of a gas eddy current in the range hood, reverberation noise and radiationnoise at an air inlet, and the improvement of a noise reduction effect of the whole range hood is facilitated.
Owner:GUANGDONG MIDEA KITCHEN APPLIANCES MFG CO LTD +1
Insulator and quartz boat
PendingCN110534269AInhibition byDeposition inhibition or reductionInsulatorsChemical vapor deposition coatingEngineeringQuartz
The invention discloses an insulator and a quartz boat. The insulator is used for positioning and insulation between electrode pieces on the quartz boat. The insulator comprises an insulator body which comprises a first end and a second end opposite to the first end, and two first positioning parts which are arranged on the first end and the second end respectively to separate the first end and the electrode piece on the side of the first end by a first distance and separate the second end and the electrode piece on the side of the second end by a first distance. The outer diameter of the positioning part is smaller than the outer diameter of the insulator body, and a first slit is determined by the first distance. The insulator provided by the invention can effectively reduce the influence of the problem of declined insulation performance caused by carbon deposition inversion.
Owner:山东力冠微电子装备有限公司
Boiler smoke treatment device and treatment method thereof
InactiveCN106334417AIncrease focus solubilityImprove adsorption efficiencyGas treatmentDispersed particle separationSpray nozzleEngineering
The invention discloses a boiler smoke treatment device. The boiler smoke treatment device comprises a treatment cavity, wherein a smoke inlet and a smoke outlet are respectively formed in two ends of the treatment cavity, a first adsorption frame and a second adsorption frame are parallelly arranged in the treatment cavity, the first adsorption frame comprises a grid formed through intersected overlap joint of a plurality of vertical frame bodies and a plurality of horizontal frames, the grid is filled with an adsorbent, first metal wire net layers are installed on two sides of the grid, first water supply pipes are arranged in the vertical frame bodies, first spray nozzles connected with the first water supply pipes are arranged on the side walls of the vertical frame bodies, a plurality of vertical first through holes are formed in the horizontal frames, a first water accumulation plate is arranged under the first adsorption frame, and a first water pump is arranged in the first water accumulation plate and is connected with the first water supply pipes. The invention further provides a boiler smoke treatment method. The shortcomings in the prior art can be overcome, and the utilization rate of adsorption raw materials is improved.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Three-dimensional low-pressure folding mask
ActiveCN105476114BReduce shockSmall effective filter areaFire rescueRespiratory apparatusEngineeringMicroparticle
The invention discloses a three-dimensional low-pressure folding mask which comprises at least one filtering piece. Fixing belts are connected on the filtering pieces. The three-dimensional low-pressure folding mask is characterized in that at least one Z-shaped first fold is arranged on each filtering piece, at least one Z-shaped second fold is arranged in a manner of being intersected with the first folds, and four sides are bonded after the filtering pieces are folded. When in use, the folds are pulled outward, a cavity can be formed in front of mouth and nose; each first fold can be drawn in a fold direction, so that the cavity formed is large in depth and abrupt in edge; most of the filtering pieces after being pulled open have wrinkles, so that enlarging of space between filtering faces of the filtering pieces and human faces is limited; when in use, only bonding positions around the filtering pieces contact with the human faces, so that contact area between the filtering faces of the filtering pieces and the human faces is small, the three-dimensional low-pressure folding mask is free of compressive feeling and comfortable to wear, and influence of breathing airflow on impact of the filtering pieces is reduced; filtering performance of each position of each filtering piece is brought into balanced play, so that microparticle penetrating probability caused by local large pressure difference of the filtering pieces is lowered.
Owner:DAQING YUANZI TECH DEV
Cyclone water-powder-air separator
InactiveCN102228872BReduce centrifugal forceReduce the air flow rateReversed direction vortexEngineeringPhencyclone
Owner:JIANGSU UNIV OF SCI & TECH
Power supply cabinet
InactiveCN105611796AReduce transferReduce the air flow rateCooling/ventilation/heating modificationsEngineeringFish mouth
The invention relates to a power supply cabinet, and belongs to the technical field of power supply and distribution. The power supply cabinet comprises a cabinet body and a panel, air inlets are formed in the panel, the cabinet body is internally provided with an air duct, an air input port of the air duct is provided with first fish-mouth-shaped air inducing ports, and the two sides of an air outlet of the air duct are provided with a second fish-mouth-shaped air inducing port and a third fish-mouth-shaped air inducing port respectively. The power supply cabinet can effectively reduce dust accumulation and improve the heat radiation effect.
Owner:SUZHOU HAIERSHI INFORMATION TECH CO LTD
Multi-station engine test bed exhaust device
PendingCN112729841ALower construction and operating costsAvoid Secondary Noise PollutionEngine testingAutomotive engineeringMechanical engineering
The invention discloses a multi-station engine test bed exhaust device. The device comprises a 1# engine test bed exhaust pipeline, a 2# engine test bed main exhaust pipeline, a 2# engine test bed auxiliary exhaust pipeline, an exhaust pipeline, an exhaust main pipeline, a vertical oil-gas separation device and a silencer, wherein two ends of the vertical oil-gas separation device are respectively communicated with an outlet of a 2# engine test bed main exhaust pipeline and an inlet of an exhaust main pipeline; the 1# engine test bed exhaust pipeline and the 2# engine test bed auxiliary exhaust pipeline are arranged in parallel and are both communicated with an inlet of the exhaust main pipeline; an outlet of the exhaust main pipeline is communicated with the silencer; and the deflation pipeline is communicated with the silencing device. The multi-station engine test bed exhaust device is suitable for the working condition that exhaust pipelines of multiple stations of multiple engine test beds or one engine test bed share the same silencing tower, mutual interference of airflow exhausted by air outlets of multiple variable-frequency diffusers is avoided, secondary noise pollution is avoided, and the multi-station engine test bed exhaust device is suitable for multiple engine test beds or multiple stations of one engine test bed; and silencing difficulty is reduced.
Owner:BEIJING AEROSPACE SANFA HIGH TECH
Air brake with gravity balance structure for ship ventilation
InactiveCN112407224ATilt angle adjustmentLengthen or shortenAuxillariesVessel ventillation/heating/coolingAir brakeEngineering
The invention discloses an air brake with a gravity balance structure for ship ventilation, which belongs to the technical field of ship ventilation and comprises a brake body; a protective shell is arranged on the outer side of the brake body; an air inlet is formed in one side of the protective shell; and an air outlet is formed in one side, far away from the air inlet, of the protective shell.Wind power balance assemblies penetrating into the protective shell are arranged at the top and the bottom of the protective shell, a plurality of sets of holes are evenly formed in the top and the bottom of the protective shell, the number of the holes is four, and every two holes form a set. Through the arrangement of an inclined flow guide plate, air flow passing through the flow guide plate impacts the inclined flow guide plates first, the impact force is used for buffering the passing air flow, the flowing speed of the passing air flow is reduced instantly, and therefore the flowing speedof the air flow passing through the flow guide plates is lower; and the higher the inclination degree of the flow guide plate is, the lower the flowing speed of the passing airflow is, so that the air flow flowing speed can be adjusted.
Owner:HUNAN YINGYUE MARINE FITTINGS ENG CO LTD
An Improved Radiator Structure
InactiveCN104279887BReduce air flowReduce cooling efficiencyStationary conduit assembliesHeat exchanger casingsLong axisTemperature difference
The invention discloses an improved radiator structure comprising a plurality of mutually parallel oval large-diameter radiating tubes. The long axis of each large-diameter radiating tube is parallel to the airflow flowing direction, a cooling fan is arranged on the rear sides of the large-diameter radiating tubes, a first groove is arranged in the front end of each large-diameter radiating tubes, straight slots communicated with two sides of each large-diameter radiating tube are arranged on two sides of the first groove, a first air inlet tube is arranged on each straight slot and penetrates the same, an air inlet passage is formed by the windward side and the leeward side of each straight slot, a first guide plate is arranged between the large-diameter radiating tubes and the cooling fan, a plurality of openings penetrating the first guide plate are arranged in the first guide plate, and the openings are arranged with the large-diameter radiating tubes collinearly. The shortcomings in the prior art can be overcome, by the new radiating structure, internal and external temperature difference of the radiator is increased under the premise that power of the fan is not increased, and accordingly heat exchange efficiency is improved.
Owner:HEBEI GUIHONG NENGHUAN COOLING TECH
A return type compressor and its engine
ActiveCN111692134BIncreased compression capacityFully stable combustionPump componentsGas turbine plantsControl theoryCylinder (engine)
The invention discloses a reflux compressor and its engine, comprising a U-shaped sleeve rotor, the U-shaped sleeve rotor comprising an inner cylinder, an outer cylinder and an annular cylinder connected between the inner cylinder and the outer cylinder Bottom; the U-shaped sleeve rotor opening side is provided with an end cover, and an inner channel stator and an outer channel stator are arranged between the end cover and the U-shaped sleeve rotor, wherein the inner channel stator is arranged on In the middle part of the inner cylinder, the outer duct stator is arranged between the inner cylinder and the outer cylinder; a low-pressure compressed air section is formed between the inner cylinder and the inner duct stator; the inner cylinder and the inner duct A high-pressure compressor section is formed between the stators of the outer duct; the airflow flows back into the high-pressure compressor section after passing through the low-pressure compressor section, and then is discharged after reflowing; the present invention can improve the compressor's compressor capacity, thereby increasing the power of the engine, and The axial dimension of the engine can be shortened.
Owner:NANCHANG HANGKONG UNIVERSITY +1
Large air volume composite muffler
ActiveCN105781682BReduce thicknessReduce widthSilencing apparatusMachines/enginesActuatorSound Absorber
The invention discloses a large air volume composite muffler, which is composed of a muffler shell, two end flanges, a muffler insert, and an air flow channel. The inner wall of the muffler shell is not provided with sound-absorbing materials; the muffler inserts are respectively It is A muffler insert and B muffler insert. The thickness of B muffler insert is 1 / 2 of the thickness of A muffler insert. Several pieces of A muffler insert and one piece of B muffler are installed in each muffler shell. Inserts, the airflow passages between the muffler inserts are consistent, the airflow passage between the side of the muffler shell and the A muffler inserts is half of the airflow passage between the muffler inserts; the length of the muffler inserts is less than The length of the muffler shell, the muffler insert is installed against the end of the muffler flange. The muffler of the present invention has large muffler capacity, high upper limit of high-frequency failure, high ratio of effective ventilation area, and small volume, and can meet strict muffler requirements especially when two mufflers are used in series.
Owner:XIAMEN JIADA GREEN CONSTRUCION ENG CO LTD
an exhaust muffler
ActiveCN105863785BImprove the noise reduction effectReduce the air flow rateExhaust apparatusSilencing apparatusPulp and paper industryMuffler
The invention discloses an exhaust silencer. The exhaust silencer comprises a barrel body, wherein an air inlet pipe is connected onto the first side of the axial direction of the barrel body; an air outlet pipe is connected to the second side of the axial direction of the barrel body; at least one air stream baffle unit which is used for baffling air streams so as to reach a silencing effect is sequentially arranged in the inner cavity of the barrel body from the first side to the second side axially; each air stream baffle unit comprises a first supporting clapboard, a second supporting clapboard and a middle cavity which is formed between the first supporting clapboard and the second supporting clapboard; a perforated pipe which is through in two ends penetrates through the central parts of the first supporting clapboard and the second supporting clapboard; and at least one communication pipe which is through in two ends penetrates through the first supporting clapboard around the perforated pipe. According to the exhaust silencer, air streams are baffled through the air stream baffle units; and meanwhile, air stream speed and exhaust back pressure are lowered, so that the silencing effect of the silencer is further improved.
Owner:浙江创格科技股份有限公司
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