49results about How to "Increase the exhaust air volume" patented technology

The invention discloses a multi-core-driven multi-stage booster combined fire-extinguishing and smoke-controlling device which comprises a carrier. The carrier is provided with a rotating lifting mechanism which is fixedly provided with a combined exhaust blower group, the carrier is also provided with a control system which is connected with the combined exhaust blower group formed by assembling and fixedly mounting six exhaust blowers together, and the six exhaust blowers are arranged up and down and integrally combined in two rows with three exhaust blowers in a row and share an outer air duct, a water supply pipeline and a water mist nozzle. The multi-core-driven multi-stage booster combined fire-extinguishing and smoke-controlling device of the invention has great exhaust air rate in case of a certain volume.

The invention discloses an efficient high blast pressure range hood. The efficient high blast pressure range hood is characterized in that: a draught fan is arranged in a range hood outer shell; the outer shell of the draught fan is connected and sealed with the range hood outer shell; a lead air channel and a mold cavity are connected and assembled to form the outer shell of the draught fan; an air inlet and an air outlet of the draught fan are on the same axis; a motor of the draught fan is fixed in the outer shell of the draught fan; the motor drives a wind wheel connected with a motor shaft to rotate in the mold cavity of the draught fan; a large-sized LED lamp panel is arranged at the lower part inside the range hood outer shell; the interval between the large-sized LED lamp panel and the range hood outer shell forms an air inlet of the range hood; the distance zone between the large-sized LED lamp panel and the range hood outer shell end face forms an air inlet guide zone of the range hood; a guide air channel is arranged in front of an air inlet end of the wind wheel of the draught fan; a plurality of guide plates are arranged at the back of an air outlet end of the wind wheel; the sectional area of an air inlet of the wind wheel is smaller than the sectional area of an air outlet of the wind wheel; the radial section of each blade of the wind wheel is convex, and the convex direction is the rotating direction of the wind wheel.

The invention relates to a roof exhaust fan. The invention is used for resolving a problem that the angle of a blind is increased to expand air displacement. Right and left blinds (7, 8) of each butterfly blind(6) are broken up into an inner side(7a, 8a) and an outside side(7b, 8b), which are linked with hinges(9, 9) in order to extend the inner side(7a, 8a) and the outside side(7b, 8b), and a spring(10) with suitable flexibility leans in order to extend.

The invention provides an organic gas recovery modular assembly and a coating machine waste gas treatment system. The organic gas recovery modular assembly is characterized in that an organic gas concentration sensor is arranged on the exhaust pipeline, connected with a drying oven, of the organic gas recovery modular assembly, so that the air supply amount and the air exhaust amount of the drying oven can be dynamically adjusted according to the detected concentration of organic gas in a production device, on the premise that the concentration of the organic gas in the drying oven is maintained within an allowable concentration range required by the design process, the power consumption of operation of a fan is reduced as much as possible, the heating load required by an oven heater is reduced, energy is saved, and the operation cost of the system is reduced.

The present invention provides a squirrel-cage-shaped motor driven water injection pump load start pressure-stabilizing water injection apparatus. The apparatus comprises a water injection pump and a squirrel-cage-shaped motor that drives the water injection pump, and the apparatus further comprises a smart vector converter, a redundant pressure controller and a pressure sensor. According to the apparatus, magnetic field oriented vector control is carried out on the squirrel-cage-shaped motor by using the smart vector converter, so that output torque of the squirrel-cage-shaped motor at a low speed is increased, and a water injection pump load start can be implemented with a small starting current; real-time monitoring of a pressure change of water injection is performed by a pressure sensor; the redundant pressure controller carries out closed-loop control on a water injection pressure signal and frequency output of the smart vector converter, and the water injection pressure is adjusted by changing a rotation speed of the motor; and an independent fan is added at a tail of the squirrel-cage-shaped motor, so as to increase the exhaust volume of the squirrel-cage-shaped motor at a low speed and reduce the temperature of the motor.

The invention relates to a volute fan for range hoods. It includes a volute, a double output shaft motor, a first centrifugal wind wheel and a second centrifugal wind wheel. There is a partition inside the volute, which divides the volute into the first air chamber and the second air chamber. The double output shafts The second output shaft of the motor is provided with a first transmission gear, and the second air chamber is provided with a second transmission gear and a rotating shaft, the first transmission gear meshes with the second transmission gear, and the second transmission gear is in transmission connection with the inner end of the rotating shaft , the outer end of the rotating shaft is connected with the second centrifugal wind wheel in transmission. Compared with the volute fan in the existing range hood, the present invention adopts double centrifugal wind wheels to blow air, thus improving the exhaust air volume of the present invention and finally improving the smoke exhaust efficiency of the range hood . Moreover, the bottom of the volute of the present invention is provided with an oil discharge hole, so that oil is not easy to remain in the volute, which ensures the cleanliness of the volute fan without peculiar smell, and at the same time reduces the difficulty of cleaning for users.

The invention discloses a centrifugal fan with an impeller structure. The centrifugal fan with the impeller structure comprises an impeller bin and an impeller assembly, wherein the impeller bin has certain inner space; and the impeller assembly is arranged in the impeller bin and is rotatably connected with the impeller bin, so that the impeller assembly can rotate relative to the impeller bin. The centrifugal fan with the impeller structure is characterized in that the impeller bin comprises a bottom wall, a plurality of air outlet side walls and a plurality of air pressing side walls; the air outlet side walls and the air pressing side walls are arranged at the edge of the bottom wall; the air outlet side walls and the air pressing side walls are arranged alternately and are successively connected end to end; a plurality of air outlets are formed in each air outlet side wall; and a V-shaped air pressing structure which is projected to the inner side of the impeller bin is arranged on each air pressing side wall. According to the centrifugal fan with the impeller structure, exhaust air rate and air pressure are high under the condition that the power of an input motor is not changed, air throwing is stable, turbulent flow is less, meanwhile, noises generated during running are further reduced, user experiences and endurance power are improved, and the market application prospect is good.

The invention discloses an exhaust assembly of a water-drive and non-electric exhaust fan. The exhaust assembly comprises an exhaust shell and an exhaust inner cylinder. The lower end of the exhaust inner cylinder is cylindrical, and the upper end of the exhaust inner cylinder is conical. The upper layer of the exhaust inner cylinder is provided with a fixing blade which is connected with the exhaust shell, and the lower layer of the exhaust inner cylinder is provided with a guide wheel blade which is connected with the exhaust shell. An impeller is driven to rotate through circulating of circulating fire fighting water in a ship body. The shape of concave blades in a turbine shell is improved, and therefore the conversion rate of water kinetic energy is improved, exhaust wind pressure is improved accordingly, and the ventilation distance of air in the ship body can be effectively increased by 30 meters.

The invention belongs to the technical field of information equipment waterproofing, especially information equipment with good waterproofing performance. Aiming at the poor waterproofing effect of the existing information equipments, the following options are proposed: including hosts, a housing and a heat sink, the front surface of the shell is provided with a display screen, and the outer surface of the display screen is provided with a blue light shielding plate, the upper surface of the host computer is provided with a keyboard and a touch pad, the host computer is internally provided with a circuit board, the lower surface of the heat dissipation seat is provided with a base, and the interior of the heat dissipation seat is provided with an exhaust fan; grooves are arranged at both sides edge positions of the lower surface of the heat dissipation seat, and four sets of jacks are arranged at both sides edge positions of the upper surface of the base. In the invention, each waterproof part cooperates to form a multiple waterproof structure, which greatly improves the waterproof effect of the equipment, has good heat dissipation property of the information equipment, and can meet different use requirements by changing the placement angle.

The invention provides a smoke exhaust and a series fan system and a control method thereof and a controller and a fan system. The series fan system for the smoke exhaust comprises a first fan, a second fan and a connector, wherein two ends of the connector are correspondingly connected to an air outlet end of the first fan and an air inlet end of the second fan; the connector comprises a controlswitch; the control switch is used for detecting the liquid property of a detecting point in the connector, controlling the working state of the second fan based on the fluid property in order to start the second fan as the first fan starts and stop the second fan as the second fan stops; the connector further comprises a throat shaped port; the section of an opening of the throat shaped port is less than that of openings of other parts in the connector; and the detecting point is positioned between the throat shaped port and the air outlet end of the first fan. According to the technical scheme, the system has the advantages that the mounting mode of the second fan is simplified on the premise that the firs fan is not changed; and moreover, the two fans can be interlinked to work, so thatthe working system of the whole series fan system can be effectively improved.

The invention relates to a wet acetylene automatic unloading calcium carbide crushing explosion-proof dehumidification ash-free dust removal system. The system comprises a rolling door and an exhaustfan arranged in an unloading area. A rolling door controlling device used for controlling the rolling door to roll and unroll is arranged on the upper part of the rolling door. The rolling rood controlling device, a power source, a motor driving the exhaust fan, and a speed regulating switch of the motor form an electric circuit. When the rotating speed of the motor increases, the rolling door controlling device is suitable for increasing opening of the rolling door. When the rotating speed of the motor decreases, the rolling door controlling device is suitable for decreasing the opening of the rolling door. The lifting height of the rolling door is controlled by the rolling door controlling device, and therefore the lifting height is in direct proportion to the rotating speed of the motor, and the rotating speed of the exhaust fan is in direct proportion to the lifting height of the rolling door.

The invention relates to an air flow control method, device and equipment and a storage medium, and belongs to the technical field of air treatment.The air flow control method includes the steps that the standard pressure intensity of each area is set according to the cleanliness degree and the geographic position of each area; wherein the areas comprise a polluted area, a semi-polluted area and a clean area; the standard exhaust air rate of the corresponding area is set according to the standard pressure intensity, and the actual exhaust air rate of each area is kept equal to the corresponding standard exhaust air rate; the pressure difference between the actual pressure intensities of the two adjacent areas communicated through the door is obtained in real time; judging whether the pressure difference is smaller than a first preset value or not; and if yes, the actual exhaust air rate of the area with the lower standard pressure intensity is increased. The present application has an effect of reducing the possibility that germs in a low-cleanliness region enter a high-cleanliness region.