69results about How to "Reduce the air flow rate" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.