36results about How to "Guaranteed wind pressure" patented technology

The invention relates to a pneumatic control system in an elevator lift car. An elevator is controlled to reduce pressure in the elevator lift car in the ascending process or to increase pressure in the elevator lift car in the descending process. The pneumatic control system comprises an air blower, an air storage tank, a pressure reduction piping group, a pressure increase piping group, a valve set, an air pressure detecting device and a control device. The air blower is arranged at the bottom of the elevator lift car, air pressure is generated continuously in the same direction when the elevator operates, and air is filled into the air storage tank or exhausted from the air storage tank so that positive pressure or negative pressure can be formed. The pressure reduction piping group and the pressure increase piping group are connected with the elevator lift car, the air blower and the air storage tank. The valve set is arranged in the pressure reduction piping group and the pressure increase piping group for controlling air circulation. The air pressure detecting device detects the air pressure in the elevator lift car and outputs detection signals. The control device regulates the opening and closing and the opening size or the opening position of the valve set according to the detection signals and controls the air pressure in the elevator lift car. Compared with the prior art, the pneumatic control system in the elevator lift car can eliminate the discomfort of passengers due to ear pressure in the ultra high-speed elevator lift car in the lifting process.

The invention provides a gap discharge characteristic detection system under a sand-dust condition, the system comprises a sand-dust environment simulation device and a high voltage generator, the sand-dust environment simulation device is used for simulating a sand-dust environment, a gap is arranged in the sand-dust environment, and the high voltage generator is connected with the two ends of the gap in parallel and is used for providing high voltage to the gap. The technical scheme provided by the invention can stably simulate the sand-dust environment and can be used in various air gap discharge characteristic test, such as rod-rod gap, rod-plate gap, plate-plate gap and the like, gap discharge characteristic tests under conditions of different voltage types, different wind speed, sand existing, sand unexisting, different sand-dust concentration can be selected according to the test requirement, so that the reference and guidance are provided for a construction of an extra-high voltage DC transmission line.

The invention discloses a kitchen ventilator convenient to use. The kitchen ventilator comprises a smoke absorbing cover, a protective cover, a draught fan, a smoke exhaust pipe, a pressure detecting head and a control device. The upper portion of the smoke absorbing cover is connected with the draught fan provided with a plurality of gears; the protective cover covers the draught fan; the draught fan is connected with the smoke exhaust pipe; a smoke outlet of the smoke exhaust pipe is connected with a flue check valve; the pressure detecting head is fixed on the flue side of the flue check valve; the pressure detecting head and the draught fan are both connected with the control device through connecting lines; and the smoke absorbing cover is composed of a smoke inlet part located in the middle part of the kitchen ventilator and a smoke collecting part around the smoke inlet part. The pressure detecting head is fixed on the flue side of the flue check valve, so that the control device can timely adjust the gears of the draught fan according to the pressure in the flue, and the draught fan has enough output power to guarantee air pressure and guarantees that lampblack can be discharged timely and effectively.

The invention relates to the technical field of air purifiers, in particular to an air purifier with air outlets in double surfaces. The air purifier comprises a shell and an air flue fixed in the shell, wherein two air inlets are respectively formed in two sides of the lower part of the shell; two air outlets are respectively formed in two sides of the upper part of the shell; the air flue comprises a turbine casing and an air supply cavity connected to the upper part of the turbine casing; a motor is mounted in the turbine casing; a rotating shaft of the motor is connected with a bidirectional wind wheel; two sides of the bidirectional wind wheel respectively communicate with the two air inlets; the upper part of the air supply cavity is connected with an air discharge component; two air discharge channels with the same structures are symmetrically arranged on the air discharge component; and the two air discharge channels respectively communicate with the two air outlets. By the two air inlets and the two air outlets, purified air quantity is greatly increased, and the purifying efficiency is improved; the structures of the two air discharge channels of the air discharge component are symmetric and the same, so that air discharge of the two air outlets is consistent, the air speed is even, air pressure loss is small, and noises of the purifier are reduced.

The invention discloses a drying device and a cleaning system, which relate to the technical field of cleaning and drying, and aim to solve the problem of drying a cleaned curved glass plate. The drying device comprises a ventilation assembly and an air knife arranged on the ventilation assembly, wherein the air knife is communicated with a draught fan through the ventilation assembly, the air knife comprises an air knife cavity communicated with the ventilation assembly, and an air outlet communicated with the interior of the air knife cavity is formed in the air knife cavity; and the shape of the air outlet is matched with the surface shape of a dried object. The cleaning system comprises the drying device in the technical scheme. The drying device and the cleaning system are used for the technical field of cleaning and drying.

The invention provides a dairy product cooling device based on a water cooling mode, and relates to the field of dairy product cooling. The cooling device solves the problem that the existing diary product cooling is large in water consumption and poor in cooling effect. The cooling device comprises a cooling box, and the bottom of the cooling box is welded to the top of a base through overhead legs, and the side wall of the cooling box close to the top is provided with a feeding port, and the side wall of the cooling box close to the bottom is provided with a discharging pipe in communication, and a water and air integrated cooling mechanism is arranged inside the cooling box. The cooling device introduces water to a water cooling pipe inside a cooling elbow to promote cooling, and an airpump introduces outside cold air into the cooling elbow through an air guide pipe. A gear motor drives the cooling elbow through a pulley to rotate inside a dairy product to promote uniform temperature reduction of the dairy product and also drive stirring of the dairy product to expose the portion with higher temperature to promote cooling.

The invention discloses a pressure and oxygen control system for a fixed bed aeration gasification process. An outlet of a blast blower is connected with an air output pipe, and an oxygen output pipeis connected with an aeration air main after converging and communicating with the air output pipe; the pressure and oxygen control system comprises an escape pipe and a pressure and oxygen control PLC, one end of the escape pipe communicates with the aeration air main, the other end of the escape pipe is connected to an inlet of the blast blower, and a pipeline of the escape pipe is provided withan escape regulating valve; the aeration air main is provided with an air pressure transmitter and an oxygen analyzer; the air pressure transmitter and the oxygen analyzer are respectively connectedto an input interface of the pressure and oxygen control PLC, and an output interface of the pressure and oxygen control PLC is respectively connected to the escape regulating valve and an aeration gasification PLC; and the pressure and oxygen control PLC controls the opening of the escape regulating valve according to the air pressure and oxygen concentration of the aeration air main and outputsan aeration control signal to the aeration gasification PLC, and the aeration gasification PLC controls an aeration regulating valve, so that the air pressure and oxygen concentration of the aerationair main are kept stable.

Provided is a dust recovery system of an electrolyte manual cleaning workshop section. The dust recovery system of the electrolyte manual cleaning workshop section comprises feeding hoppers, a bag filler, a centrifugal fan, dust removal air pipes and exhaust hoods, wherein the independent feeding hoppers are assembled below feeding grids of stations of the electrolyte manual cleaning workshop section respectively, openings are formed in the two opposite sides of the upper portion of each feeding hopper, each opening is communicated with the corresponding exhaust hood, the exhaust hoods arranged on the same sides of the feeding hoppers are communicated with the dust removal air pipes respectively, the two dust removal air pipes are communicated with an air inlet of the bag filler at the same time, and an air outlet of the bag filler is communicated with an inlet of the centrifugal fan. According to the dust recovery system of the electrolyte manual cleaning workshop section, the dust removal technology is applied to working places where closed exhaust hoods cannot be arranged, effective control over dust of a manual operation place is achieved, the working environment required by an existing process system is ensured, the dual-purpose effect is achieved, and the dust recovery system of the electrolyte manual cleaning workshop section has good application prospect.

The invention relates to the field of household appliances, and the problems that an electric hair drier is large in size and air volume and air pressure are lost are solved. The present invention especially relates to a high-speed electric hair drier. The high-speed electric hair drier comprises a shell, a handle assembly connected with the shell, an air inlet, an air outlet, a fan unit used forsucking air flow into the electric hair drier from the air inlet, and a heating unit used for heating the air flow. The fan unit comprises fan blades and a motor used for driving the fan blades to rotate, the motor comprises a stator assembly and a rotor assembly, and the motor further comprises a support used for supporting the rotor assembly and the stator assembly. The rotor assembly is connected with the fan blades and drives the fan blades to rotate; the support comprises a first cylinder used for supporting the rotor assembly and a second cylinder used for containing the fan blades. Thefirst cylinder is arranged on one side of the second cylinder and is connected with the second cylinder through a connecting blade; the electric hair drier further comprises an air guide pipe, the second cylinder comprises an air inlet side and an air outlet side, and the fan blades rotate to enable airflow to enter the second cylinder from the air inlet side and enter the air guide pipe from theair outlet side.

The invention relates to a concrete mixing plant which can carry out staged dedusting in the working process and a method; the concrete mixing plant consists of a stirring mill, an aggregate temporary storage bin, a main tower composed of a powder metering device, a dust removing device and a control unit. The stirring mill is communicated with the dust removing device by a first dust transfer passage, the powder metering device is communicated with the aggregate temporary storage bin by a second dust transfer passage, the dust removing device is connected with the aggregate temporary storagebin and is communicated with the aggregate temporary storage bin by a third dust transfer passage, the third dust transfer passage is internally equipped with a ventilation door which can be opened or closed, the ventilation door can be manipulated by a door operation mechanism to shift between an open position and a closed position, and the door operation mechanism is arranged to be controlled by the control unit. The staged dedusting method is characterized in that: the dust removing device can carry out dedusting operation during the process of putting aggregate into the aggregate temporary storage bin by optionally closing or opening the ventilation door, while dedusting operation is stopped during the process of transferring the aggregate from the aggregate temporary storage bin intothe stirring mill.

The invention discloses a high-efficient thread sucking machine for preventing a thread residue from blocking a filter plate. The high-efficient thread sucking machine is used for solving the problems of bad absorbing effect and low absorbing efficiency of the existing thread sucking machine. The high-efficient thread sucking machine comprises a case, wherein a centrifugal fan driven to rotate by a driving motor is arranged in the case; the upper end of the centrifugal fan is provided with a first filter plate, and the case at the upside of the first filter plate is provided with an air inlet flue; the lower side of the case is provided with an air outlet, and the periphery of the centrifugal fan is sleeved with a first air inlet flue, and the upper end of the first air inlet flue is contacted with the first filter plate; the upper part of the first filter plate is provided with a second air inlet flue with a small upper end and a big lower end; the lower end of the second air inlet flue is corresponding to the first air inlet flue, and the upper end of the second air inlet flue is provided with an air inlet channel; a spiral flow diversion plate is arranged in the air inlet channel, and a gap is arranged between the air inlet channel and the second air inlet flue; the periphery of the second air inlet flue is provided with a collecting silo; the upper end of the collecting silo is sleeved at the periphery of the air inlet channel; a closed space is formed by the first air inlet flue, the collecting silo and the air inlet channel.

The invention discloses an air-drying device for plastic braces, which comprises a conveying unit, an air-drying unit, and a gas-liquid separation unit. The air-drying unit includes a water receiving tray and a fan connected to the bottom of the water receiving tray through an air pipe. The conveying unit includes a set The two sets of conveying rollers on the upper end of the water receiving tray, the cover plate located above the water receiving tray, the plastic stays are moved and tensioned between the two sets of conveying rollers and the cover plate, and the gas-liquid separation unit includes a A separation box with a separation chamber inside. The lower part of the separation box has a drain port and the upper part has an exhaust port. A gas-liquid separation channel is formed between the air outlet of the fan and the exhaust port. The cover plate is hingedly installed on the upper part of the water tray to ensure the wind pressure of the air inlet when the fan is working. The fan sucks away the moisture on the plastic braces in real time, and the air flow with water enters the gas-liquid separation unit from the air outlet. After separation, the gas flows from the exhaust port. Drain, the water is discharged from the drain port, the structure is simple, compact, simple and beautiful, the work is reliable, and the work efficiency is effectively improved.

The invention discloses a differential kiln capable of automatically cooling a bearing to realize dust removal. The differential kiln comprises a kiln body, a loop tower, a loop tower bearing and a high-pressure blower communicated with the kiln body, wherein the loop tower bearing comprises balls, a lower ball seat fixedly arranged and an annular upper ball seat arranged on the lower ball seat; a ball groove is arranged between the upper ball seat and the lower ball seat; the upper ball seat or lower ball seat is provided with an air inlet communicated with the ball groove; the air inlet is communicated with the high-pressure blower; and the upper ball seat is provided with an air outlet communicating the ball groove and the upper surface of the upper ball seat. In use, high-pressure air generated by the high-pressure blower is blown into the ball groove through the air inlet and then discharged into the kiln for calcining through air outlet, and the process can effectively cool the balls and the ball groove and remove dust out of the ball groove; and meanwhile, a certain air pressure is kept in the ball groove, thereby effectively preventing external dust from moving in the ball groove. Thus, in a working environment of a low rotation speed, the bearing can not seriously damaged without use of any lubricating oil, thereby ensuring that the bearing is maintenance-free.

The invention discloses a centrifugal fan and a range hood. The centrifugal fan comprises an impeller and a plurality of main fan blades; the impeller comprises a front disc, a main air inlet and a bottom disc; the main air inlet is formed in the center of the front disc and used for feeding air into the impeller; the bottom disc is arranged opposite to the front disc; the main fan blades extend from the center of the impeller to the periphery and are sequentially distributed between the front disc and the bottom disc in the circumferential direction, an air outlet channel is formed between every two adjacent main fan blades, and the air outlet channels are matched with the main air inlet to form a main air channel; and at least one air outlet channel is internally provided with an auxiliary air channel, the front disc is correspondingly provided with an auxiliary air inlet used for feeding air into the auxiliary air channel, and the auxiliary air inlet is formed in the position close to the periphery of the front disc relative to the main air inlet. According to the centrifugal fan, ventilation can be achieved through the main air channels of the impeller and can also be achieved through the auxiliary air channels, and the ventilation quantity is increased; and in addition, the auxiliary air channels are arranged in the corresponding air outlet channels, so that the pressure difference in the air outlet channels can be reduced, the vortex effect is reduced, and then noise is reduced.

The invention relates to the field of agricultural machinery, in particular to a self-regulating bionic fan with a variable angle, which consists of a center mounting carrier, a steering gear, bionic fan blades, a gas flow sensor and an embedded development board; the bionic Between the two points A and B on the upper half of the fan blade is the outer edge curve of the fan blade. The outer edge curve is formed by connecting a plurality of convex outer edge convex hulls (simulating the outer edge curve of the humpback whale fin) ; The inner edge curve of the fan blade is between the two points of the lower half of the bionic fan blade A', B', and the inner edge curve is formed by a plurality of (simulated humpback whale fin outer edge curves) concave inner curves. The bionic fan of the invention can imitate the swing of the fins of the whale when it is swimming, increase the air flow of the fan, and stabilize the air flow at the same time. It is suitable for the operation of the pneumatic seed meter in any environment .

The invention discloses a suction cup device and artificial board production equipment. The suction cup device comprises a suspended hood, wherein a plurality of suction openings are formed in the air suction face of the suspended hood; a plurality of sealing rings surrounding the suction openings in a one-to-one correspondence mode are arranged at the outer side of the suspended hood; at least one suction opening is provided with a self-locking valve; the self-locking valve comprises a valve shell and a valve core; the valve shell is provided with a valve channel communicated with the suction opening in a penetrating mode; the valve core is movably connected to the valve shell through a reset mechanism; the reset mechanism is used for driving the valve core to communicate the valve channel and the suction opening; and the valve core can partially block the valve channel and / or the suction opening in the air suction direction under the air suction effect. According to the scheme, leaking stoppage measures are taken for damaged plates, air pressure is effectively guaranteed, the adsorption effect is greatly improved, and the equipment weight and energy consumption are reduced.