204results about How to "Improve blowing efficiency" patented technology

Cooling efficiency of cooling air is enhanced and durability of a continuously variable transmission is improved. The continuously variable transmission to be mounted on a vehicle has a transmission case. A primary pulley driven by an engine and a primary pulley linked to drive wheels are rotatably accommodated in the transmission case. A V-belt is provided to extend for winging between the primary pulley and the secondary pulley, and the rotation of the primary pulley is continuously changed and transmitted to the secondary pulley. Fan blades are formed in the primary pulley, and a scroll surface is formed in transmission case from an intake region of the cooling air toward a discharge region thereof so as to gradually away from top faces of the fan blades in a radial-outer direction. Thereby, blowing efficiency of the cooling air can be enhanced and an interior of the transmission case can be sufficiently cooled, whereby the durability of the V-belt can be enhanced.

The present invention discloses guide blades of an axial flow fan shroud for guiding the air blown by an axial flow fan in an axial direction, and more particularly, to a guide blade structure capable of preventing the backflow of high temperature heat from an engine room toward a condenser. A guide blade 35 of an axial flow fan shroud 30 comprises: a leading edge 37 for introducing the air blown by an axial flow fan 10 including a number of blades 12; a trailing edge 39 extended from the leading edge 37 to downstream; and an air flow guide surface 38 for guiding the blown air between the leading and trailing edges 37 and 39, wherein if a first outlet area a is defined by at a radius r from a root in the total length R of an angle of projection Aout of the guide blade 35 and a second outlet area b is defined by the remainder, the angle of projection Aout increases as approaching a tip with respect to an axial line in the second outlet area b.

Disclosed is an axial flow fan capable of achieving reduction of noise while having a high blowing efficiency compared to the power consumption of a motor adapted to drive the axial flow fan. The axial flow fan includes a hub, and a plurality of blades extending radially around the hub. Each blade has a sweep angle varying gradually from a backward angle at a root of the blade connected to the hub to a forward angle at a tip of the blade, while having a flow dispersion region having a plurality of regions where the sweep angle is alternately changed, at a region defined between a backward sweep angle region at the root of the blade and a forward sweep angle region at the tip of the blade. Each blade has a longitudinal cross section curved to have a wave structure between the root of the blade and the tip of the blade. The axial flow fan may further include a fan band connecting tips of the blades. The axial flow fan achieves reduction of blowing noise by receiving air in a dispersed state at the leading edge of each blade, discharging air in a dispersed state at the trailing edge of each blade, and offsetting turbulent flows of air by virtue of the wave-shaped longitudinal cross-sectional structure of each blade.

Guide blades of an axial flow fan shroud for guiding the air blown by an axial flow fan in an axial direction. A guide blade of an axial flow fan shroud has a leading edge for introducing the air blown by an axial flow fan including a plurality of blades; a trailing edge extended from the leading edge to downstream; and an air flow guide surface for guiding the blown air between the leading and trailing edges. A first outlet area a is defined by at a radius r from a root in the total length R of an angle of projection Aout of the guide blade and a second outlet area b is defined by the remainder, the angle of projection Aout increases as approaching a tip with respect to an axial line in the second outlet area b.

A handheld blower includes a housing, the housing including an air inlet and a duct assembly, the duct assembly including a duct, a motor and a fan mounted in the duct, a battery, a handle, and a blowpipe which defines a central axis. Along the direction of the central axis, the area of the flowing cross-section of an air passage at the rear end of the fan adjacent to the air inlet is larger than that of the flowing cross-section of an air outlet of the blowpipe, and the rate between the area of the flow cross-section of the air outlet of the blowpipe and the area of the flow cross-section of the flow-through area at the position of the fan is greater than or equal to 0.8.

A dehumidifier includes a body having inlet and outlet ports and a centrifugal fan mounted inside the body to circulate air. The centrifugal fan includes a fan disk coupled to a fan motor such that the fan disk can be rotated, and the fan disk includes an incline inclined toward the outlet ports to guide the flow of air passing through the centrifugal fan to the outlet ports. The incline extends from a motor coupling part of the fan disk, which is coupled to the fan motor, in the radial direction. Blades are mounted at the outer circumference of the incline.

Provided is an air blowing unit for a vehicle which, even when a backflow prevention means which prevents the flow of air which flows back through a gap formed between a bottom surface of an impeller and an upper surface of a motor flange is adopted, optimally maintains a size of the gap thus suppressing noises and the collection of moisture and, can suitably boost a pressure of air in a scroll case portion.With respect to a case of an air blowing unit, a projecting portion is formed in a projecting manner on an inner side of a second wall portion on a side opposite to a first wall portion where an air suction port is formed as an air backflow prevention means. The projecting portion is positioned outside an impeller in the radial direction with a predetermined gap between a radial outer end of the impeller and the projecting portion.

A cooling air blowing apparatus of a refrigerator includes: a driving motor fixed at a motor mound formed at a rear side of a freezing chamber; a blowing fan mounted at a rotational shaft of the driving motor and blowing cooling air in a suction direction along the axis direction and blowing cooling air in a suction direction along a radial direction, while being rotated as the driving motor is driven; and a shroud positioned in a circumferential direction of the blowing fan. The blowing fan for blowing cooling air into the cooling chamber and the freezing chamber includes a turbo blade for blowing cooling air in a radial direction of the direction in which cooling air is blown in addition to the axial flow blade for blowing cooling air in an axial direction of the direction in which cooling air is blown, to supply cooling air into the freezing chamber and the cooling air chamber. Thus, in the complicated and long cooling air passage structure, cooling air can be circulated smoothly and quickly.

The invention relates to a centrifugal type impeller which comprises a wheel disk, a wheel hub and a plurality of blades, wherein the wheel hub is positioned at the center of one side surface of the wheel disk and is provided with a center axial line; an impeller rotates around the center axial line; the multiple blades are arranged on the side surface and are positioned in an annular region surrounded by the periphery of the wheel hub and the periphery of the wheel disk; the cross sections of the blades are S-shaped along the direction perpendicular to the center axial line and comprise two tangent curves with opposite directions; the two curves comprise front blade sections extending from the end part of the wheel hub to a tangent point and rear blade sections extending from the tangent point to the periphery of the wheel disk; the tangent point is positioned at the position which is 76-95 percent of the chord length of each blade away from the end part of the wheel hub. The blades are S-shaped, and the tangent point of the S-shaped curves is positioned at the position which is 76-95 percent of the chord length of each blade; the position of the tangent point enables the rolling suction range of vortex to be effectively suppressed and the intensity of the vortex to be reduced after vortex formation and before vortex falling, and therefore, the flowing resistance of air flow is reduced, and the air discharging efficiency of the impeller is improved. The invention also relates to a blowing and sucking device comprising the centrifugal type impeller.

The invention relates to a handheld blowing suction machine with an auxiliary air cylinder. The handheld blowing suction machine comprises a machine head part (1) and an air duct (2), wherein the air duct (2) comprises an air suction cylinder (3) and an air blowing cylinder (4); and the handheld blowing suction machine is characterized in that the front end of the air blowing cylinder, (4) close to an air outlet (8) is provided with the auxiliary air cylinder (9); and the auxiliary air cylinder (9) surrounds the air outlet (8) to form an auxiliary flow channel (10). The auxiliary flow channel has the air amplification characteristics and can be used for guiding high-speed airflow to achieve higher-speed airflow, so that the air outlet airflow is amplified and blown out. The handheld blowing suction machine is simple in flow channel airflow amplification and turbulence resistance structure, low in cost, effective, reliable and suitable for most of blowing suction machines in the market.

The invention provides a handheld hair drier. The hair drier comprises a casing, a handle, a battery and a hair drying tube, wherein air inlets are formed in and a duct assembly is arranged on the casing, and the duct assembly comprises a duct connected with the casing, a motor and a fan; the motor and the fan are mounted in the duct; the casing is connected to the hair drying tube, by the duct assembly, and the battery is mounted on the casing. A center axis is defined on the hair drying tube, the area of the flowing cross section of an air duct at the back end of the fan at the position which is to the position of the air inlets along the direction of the axis is greater than that of the flowing cross section of the position of an air outlet in the hair drying tube, a flowing surface is formed between the inner wall of the casing and a hub of the fan, and the ratio of the flowing cross section of the position of the air outlet in the hair drying tube to the flowing cross section of the flowing surface at the position of the fan is greater than or equal to 0.8. The hair drying efficiency of the handheld hair drier provided by the invention is higher, and the requirement of a user is further satisfied.

A blower including a blower volute, a blower motor, and a fan wheel. The blower motor is disposed at the top of the blower volute. The fan wheel is disposed inside the blower volute and connected to the blower motor. The blower volute comprises an air inlet, an air outlet, a cover body, and a bottom cover. A plurality of installation parts is disposed at an outer side of the cover body. The bottom cover and the cover body are embedded with each other and welded together or stuck together. The blower has a simple connection structure, high generality, friendly installation, and low cost.

The invention belongs to the field of metallurgy, and relates to a spray blowing method in smelting of iron-vanadium alloy. A technical scheme for solving the technical problem is as follows: a, adding the batch mixed smelting raw materials containing V2O5 and V2O3 into a smelting furnace in batches, powering on the smelting furnace, and smelting; b, spray blowing after the smelting is ended, wherein a spray blowing material is a mixture of aluminum powder and vanadium-iron fine powder; and c, continuously electrifying and refining after the spray blowing is ended. By adopting the method, the spray blowing efficiency is improved, the content of vanadium in the vanadium-iron smelting slag is reduced, and the yield of smelting vanadium is increased.

A process for producing a molded item of thermosetting resin, and injection molding machine therefor, capable of preventing burring and bubble inclusion at molding operation. There is provided a process for producing a molded item of thermosetting resin with the use of a mold having a cavity for forming a product part, a gate forming a gate part, a runner forming a runner part and an overflow catcher communicating with the cavity and forming an overflow part, which process comprises the injection step of injecting a liquid resin until filling the region from the runner through the gate to the cavity and further the region from the cavity to the overflow catcher; the hardening step of heating the liquid resin within the mold so as to effect hardening; the demolding step of detaching a resin molded item having the runner part, gate part, product part and overflow part from the mold; and the cutting step of cutting the gate part and overflow part off the product part of the demolded resin molded item.

The invention provides an air blower which comprises a shell, a motor, an axial fan, an air blowing pipe and a duct, wherein an air inlet is formed in the shell; air enters from the air inlet; the motor is located in the shell; the axial fan is driven by the motor to rotate to generate an air flow; the axial fan comprises matched and connected with the motor and a plurality of blades mounted on the hub; the air blowing pipe is connected with the shell and is provided with an air outlet; the air flow is blown out of the air outlet; the duct is used for guiding the air flow to move toward the air outlet; the diameter of the axial fan is less than 88mm; the rotating speed of the motor is more than 21000rpm. Compared with the prior art, the air blower provided by the invention has the advantages that the small-diameter fan is driven at a high rotating speed, the power consumption is low, the higher air-blowing efficiency is acquired, the heavier leaves on the lawn and the leaves located in the gaps can be conveniently blown.

The invention relates to a blower. The blower comprises a casing, a motor, an axial flow fan, a blowpipe and a duct, wherein a wind inlet is formed in the casing, and air enters the casing through the wind inlet; the motor is positioned in the casing; the axial flow fan is driven by the motor to rotate along a fan axis and generate air currents; the blowpipe is connected with the casing and is provided with a wind outlet, and the air currents are blown out of the wind outlet; the duct is used for guiding the air currents to move towards the wind outlet; air current passages are arranged in the casing and the blowpipe, and comprise an upstream region from the wind inlet to the axial flow fan and a downstream region from the axial flow fan to the wind outlet, the motor is arranged at the upstream region, and the duct is arranged at the downstream region.

Provided are a blower, capable of suppressing noise occurring in a stator while significantly improving blowing efficiency, and an outdoor unit using the same. The present disclosure comprises: a bell mouth part spaced apart at a predetermined distance in the radial direction with respect to an outer circumferential end of a propeller fan; and a diffuser part installed on the downstream side of the bell mouth part, and having a flow path area which is enlarged from the upstream side toward the downstream side with a larger magnification rate than the magnification rate of the flow path area in the downstream end of the bell mouth part; and a stator part having a plurality of stators, wherein the stator part is arranged within the diffuser part.

The invention discloses a 90-degree angle of attack coupled 360-degree rolling device for a sub-span super wind tunnel. The device comprises a bottom plate, a limiter, a column, an upper plate, a servo motor reducer assembly, a main output gear, a large diameter gear, a main screw assembly, an auxiliary screw assembly, a small diameter gear, a vertical bevel gear assembly, a horizontal bevel gearassembly, a counterweight assembly, an auxiliary screw adapter assembly, a main screw adapter assembly, a pull rod, an oil cup, a wire sensor, a sealing plate, a pipe line assembly, a supporting arm,a connecting rod, a pipe joint assembly, a support segment assembly, a dummy support rod, a linear guide rail and a sliding block support seat assembly. The device utilizes the inverse movement of aneccentric crank sliding block mechanism to continuously and accurately achieve a wide range of angles of attack of 15 to 90 degrees or even 120 degrees. The length of the 1.2m wind tunnel model can reach 800mm, and the blocking degree is less than or equal to 3%. The wind tunnel large angle of attack test capability under supersonic and subsonic conditions can be expanded.

A fan-driven heat dissipating device with enhanced air blowing efficiency is proposed, which is designed for use in conjunction with an integrated circuit device for dissipating the heat produced by the integrated circuit device during operation, and which is characterized by the provision of a secondary air outlet on the lateral side of the casing beside a primary air outlet, which allows part of the radially-flowing air stream to exit the casing laterally from the secondary air outlet, so that frictional loss due to the air flow striking against the inner wall of the casing can be reduced, allowing the fan module to provide a more enhanced air blowing efficiency than the prior art. This feature allows the fan-driven heat dissipating device of the invention to provide a more enhanced heat-dissipating efficiency than the prior art.

A turbofan for blowing comprises: a base plate having a hub protruding from a center thereof; a plurality of blades disposed on an outer circumerential surface of the base plate with a constant interval therebetween in a circumferential direction; and a shroud connected to the blades in opposition to the base plate. An outer diameter of a fan, a height of the blade, an inner diameter of the blade, an inner diameter of the shroud, an entrance angle of the blade, etc. are designed with an optimum condition, there by improving a blowing efficiency for cool air and reducing power consumption and noise.

A heat exchanger for an indoor unit of an air conditioner, including at least a housing (1) having an air inlet (15) and an air outlet (16), a cooling coil (3), and a centrifugal blower (4) having an air exit (17), a volute housing (5), a motor (6) and a centrifugal wind wheel (7). The cooling coil (3) and the centrifugal blower (4) are disposed in the housing (1). The air inlet (15) and the air outlet (16) are disposed on both ends of the housing (1). The cooling coil (3) is disposed at the back of the air inlet (15). The centrifugal blower (4) is disposed at the back of the cooling coil (3). The air exit (17) of the centrifugal blower (4) is connected to the air outlet (16) of the housing (1). The motor (6) is an external rotor motor and fits in the center of a cavity in the centrifugal wind wheel (7). A left air intake (11) and a right air intake (12) are formed on both sides of the volute housing (5). The heat exchanger features large air input and air output, and high blowing efficiency.

The invention discloses a fixed bed coal-gas producer aerobic intermittent gasification method and the technology. The method comprises intermittently inputting gas to a coal-gas producer, wherein the gas is aerobic air which is mixed by air and oxygen and the oxygen-containing concentration of the aerobic air is 22-53%. The technology comprises firstly, inputting the aerobic air into a furnace, then, using steam to blow to the furnace inside in the order of blowing upwards, blowing downwards and secondly blowing upwards, and generating coal-gas. The invention can increase the air blowing efficiency, reduce discharging volume of waste gas, and saves energy sources effectively, when the oxygen-containing concentration of the aerobic air reaches to about 50%, furnace inside temperature reaches best reaction temperature due to the increase of the air blowing efficiency under the condition that the nitrogen volume reaches demands in a system, thereby the gas quality reaches balance, zero emission can be realized, thereby the invention can utilize the energy sources to the maximum, and the produced coal-gas has good gas quality.

A blower apparatus includes an impeller arranged to be capable of rotating about a central axis extending in a vertical direction, and a motor arranged to drive the impeller. The impeller includes a plurality of blade portions arranged in a circumferential direction, and a flange portion arranged to have the blade portions arranged on an outer peripheral portion thereof on a radially outer side. At least one of the blade portions includes a shoulder portion at an end portion thereof on a radially inner side and on one axial side. The shoulder portion includes a first end surface arranged to face to the one axial side, a second end surface arranged to face to the one axial side and arranged on another axial side of the first end surface, and a third end surface arranged to join an inner end portion of the first end surface on the radially inner side and an outer end portion of the second end surface on the radially outer side to each other.

The invention relates to an anti-clogging device for a drum screen, comprising a main pipe, a jet device, a movable joint, a pulse electromagnetic valve, a main pipe movable joint, a variable-diameter three-way connector and a pipe clamp, wherein one end of the main pipe is connected with a gas source, and the other end of the main pipe is connected with a first branch pipe through the main pipe movable joint; the first branch pipe is connected with a branch pipe through the variable-diameter three-way connector; and the pipe clamp is arranged on the branch pipe, and the variable-diameter three-way connector is connected with the jet device through the moveable joint; and a nozzle is arranged on the jet device. The anti-clogging device blows an object through the action of gas flow, and the blowing area can cover the effective area of all the sieve plates, and therefore better blowing effect is formed; air produces intermittent blowing through the throttling action of the electromagnetic valve, and the blowing efficiency is improved; the anti-clogging device is simple in structure, low in manufacture cost and energy-saving, and is conveniently mounted and used; and the labor intensity of workers is reduced, the pollution is reduced, and the industrial popularization and application are convenient.

A portable-blower duct has a bendable portion (22) whose inner peripheral surface (221A) is a cylindrical surface without any protrusions or recesses in a normal state or in an expanded state, that is, unless it is greatly curved. With this construction, no turbulence is generated in air passing through a tube (221), thereby making it possible to suppress pressure loss. Thus, the flow velocity of air guided through the duct is not reduced, thereby suppressing a deterioration in air blowing efficiency. Even when the tube (221) is curved, the outer side of the curved portion is expanded, and the corresponding portion of the inner peripheral surface remains a smooth surface, thus making it possible to minimize the air pressure loss.

The invention discloses an efficient lime powder sprayer, belongs to powder sprayers in the technical field of powder spraying and aims to provide an efficient lime powder sprayer. The efficient lime powder sprayer comprises a material barrel, a feeding adjusting hopper is arranged in an inner cavity of the material barrel, a feeding port of the feeding adjusting hopper penetrates out of the top of the material barrel, the bottom of the material barrel is connected with a driving motor, and a vibration stirring device is arranged in the material barrel and connected with the driving motor. One end of the bottom of the material barrel is connected with a discharging pipe, one end of the discharging pipe is communicated with a blowdown pipe, the middle of the blowdown pipe is communicated with the discharging pipe, and the other end of the blowdown pipe is connected with a fan. A secondary smashing device for protecting high-speed air flow from reverse flowing is further arranged between the material barrel and the blowdown pipe, the two ends of the secondary smashing device are communicated with the material barrel and the blowdown pipe through the discharging pipe, and the discharging pipe between the secondary smashing device and the material barrel is connected with an air inlet adjusting valve.