203results about How to "Improve blowing efficiency" patented technology

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.

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.

A blower, comprising: a housing comprising an air inlet, a motor disposed in the housing, an axial fan configured to be driven to rotate about a fan axis and generate an air flow by the motor, a blowing tube configured to be coupled to the housing and comprising an air outlet, a duct configured to guide the air flow to the air outlet, the housing and the blowing tube comprises an air passage which comprises an upstream region between the inlet and the axial fan and a downstream region between the axial fan and the air outlet, the motor is disposed in the upstream region and the duct is disposed in the downstream region.

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 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.

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.

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 cooling fan includes a cylindrical boss portion, a plurality of blades extending from the boss portion in a radial direction and a ring member integrated with radial outside edges of the blades. The ring member has an axial dimension smaller than an axial dimension of the blade at the radial outside edge, with respect to an axial direction of the boss portion. The ring member has an extending portion extending in a form of bell toward an upstream position of the blades with respect to an air flow. The extending portion is disposed such that a base point connecting to a body portion of the ring member is arranged in a range that begins at a point 25% and ends at a point 85% of a distance from an upstream end of the radial outside edge of the blade with respect to the axial dimension of the blade.

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.

This blower apparatus includes an air blowing portion including a plurality of flat plates arranged with an axial gap defined between adjacent ones of the flat plates; a motor portion arranged to rotate the air blowing portion; and a housing arranged to house the air blowing portion and the motor portion. The housing includes an air inlet arranged to pass through a portion of the housing in an axial direction above the air blowing portion, and an air outlet arranged to face in a radial direction radially outside of the air blowing portion. One of the flat plates includes a projecting portion arranged to project upward and/or downward, and another one of the flat plates includes an opposing portion arranged to be circumferentially opposed to the projecting portion. Relative circumferential positions of the flat plates can be easily fixed by the opposing portion.