Showing papers on "Centrifugal fan published in 1995"
Patent•
08 Jun 1995TL;DR: An inlet orifice structure (10) and impeller assembly (20) for a centrifugal flow fan is described in this paper. Butler et al. describe a fan with 13 impeller blades nonuniformly spaced around a hub plate (202).
Abstract: An inlet orifice structure (10) and impeller assembly (20) for a centrifugal flow fan. The inlet orifice (10) has an elliptical cross section in a plane passing through the axis of rotation of the fan. The impeller (20) is shrouded and also has a similarly elliptical cross section. The impeller (20) is sized so that, when assembled together, the shroud overlaps and rotates around the stationary inlet orifice. In a preferred embodiment, there are 13 impeller blades (203) nonuniformly spaced around a hub plate (202). A particular blade spacing is disclosed and claimed. The inner surface of the hub plate (202) is arcuately curved to guide the air flow through the fan from its entering axial direction to its radial exiting direction. The contour of the hub plate (202) allows for the fan drive motor to be partially recessed into the plate.
41 citations
Patent•
15 Sep 1995
TL;DR: In this article, a centrifugal blower is provided with a casing which defines a spiral duct and a rotating fan which is rotationally provided within the casing to reduce the low velocity air flow zone.
Abstract: A centrifugal blower is provided with a casing which defines a spiral duct and a centrifugal fan which is rotationally provided within the casing. The centrifugal fan has a bottom plate and a plurality of blades which are equally spaced along the periphery of the bottom plate. The plurality of blades extends parallel to the rotational axis. The duct is arranged to reduce the size of a low velocity air flow zone which is generated in an upper radially outer region in the spiral duct. The low velocity air flow zone, which appears in an upper radially outer region in the air duct, is reduced to reduce surging in the blower.
34 citations
Patent•
05 Apr 1995TL;DR: A centrifugal oil separator assembly (36) mounted to the front cover of an internal combustion engine (26) adjacent to the engine crankcase is shown in this article, where blowby gas is drawn through the centrifugal fan blades and then pushed into an air flow passage leading to the air intake system.
Abstract: A centrifugal oil separator assembly (36) mounts to the front cover (26) of an internal combustion engine (20) adjacent to the engine crankcase (34) The oil separator assembly (36) includes a first rotational member (42) that has turbo fan blades (52) and a second rotational member (56) that has centrifugal fan blades (60) and air seal grooves (66) A driven pulley (44) causes the oil separator assembly ( 36 ) to rotate As it rotates, blowby gas is drawn through the centrifugal fan blades (60) where oil is separated from the gas and then through the turbo fan blades (52) which pushes the filtered gas into an air flow passage (28, 30) leading to the air intake system (31)
28 citations
Patent•
24 Oct 1995TL;DR: In this article, an engine driven generator set includes a vertical shaft engine which rotates a generator rotor and a centrifugal fan mounted above the engine, which collects cooling air blown over generator stator windings by the fan and directs the cooling air through an air duct over the engine cylinder head.
Abstract: An engine driven generator set includes a vertical shaft engine which rotates a generator rotor and a centrifugal fan mounted above the engine. A plenum collects cooling air blown over generator stator windings by the fan and directs the cooling air through an air duct over the engine cylinder head. Electronic circuitry is cooled by this same cooling air.
24 citations
Patent•
[...]
05 Jun 1995
TL;DR: In this paper, the authors proposed a method to suppress air flow which flows from a casing side toward a space part sectioned between a centrifugal fan and a fixed fan so as to prevent reduction of a suction property by arranging a means for suppressing flow of air between the plate of the centrifugal fans and a stationary member consisting of the fixed fan or the casing.
Abstract: PURPOSE: To suppress air flow which flows from a casing side toward a space part sectioned between a centrifugal fan and a fixed fan so as to prevent reduction of a suction property by arranging a means for suppressing flow of air between the plate of the centrifugal fan and a stationary member consisting of the fixed fan or the casing. CONSTITUTION: When an electric blower A is driven, air sucked from an intake port 22a flows out from a discharge hole 12b outward passing through the intake opening 41 of a fan cover 40 by rotation of a centrifugal fan 21 after air flows into a casing 14 while it is guided by the guide wall 31 of a fixed fan 30. At this time, air in a space part S which is sectioned between the 2 plate 23 back surface of the centrifugal fan 21 and the fixed fan 30 flows to an outer peripheral side, and it becomes a low pressure condition. Air in the casing 14 becomes a high pressure condition, and it flows through the clearance of a ball bearing 16. In this case, flow of air in the space part S is suppressed by a plurality of annular projections 34a to 34c. It is thus possible to prevent reduction of suction property caused by air flow which flows from the back surface side of the fixed fan 30 passing through the space part S. COPYRIGHT: (C)1996,JPO
15 citations
Patent•
26 Dec 1995
TL;DR: In this paper, a fan with a spiral shape and a turbine actuated by an electrical motor is used to suck air inside by turbine rotation and evacuate through an outlet placed at the extremity of the casing.
Abstract: The fan (1) includes a casing (2) with a spiral shape (3) and housing a turbine (4) actuated by an electrical motor (5). Air is sucked inside by turbine rotation and evacuated through an outlet (7) placed at the extremity (8) of the casing. Close to the casing extremity, a recess (10) is provided for housing the control module (11) of the motor. The module includes a pcb (12) with a number of electronic components and a heat sink (16).
14 citations
10 citations
Patent•
17 Jan 1995
TL;DR: In this paper, the authors proposed a cooling system for an electronic apparatus in which heated air can be prevented easily from moving to another electronic apparatus side and the quantity of heat being dissipated from a heat sink can be increased easily.
Abstract: PURPOSE: To obtain a cooler for an electronic apparatus in which heated air can be prevented easily from moving to another electronic apparatus side and the quantity of heat being dissipated from a heat sink can be increased easily. CONSTITUTION: A centrifugal fan 20 is disposed on the heat dissipating part 12 side of a heat sink 10 while directing the air suction port 21a toward the central side thereof. The air on the outside of the heat dissipating part 12 of the heat sink 10 is collected through the heat dissipating part 12 to the air suction port 21a side of the centrifugal fan 20 and discharged through the air delivery part 21c of the centrifugal fan 20 to a desired place. Consequently, the heat dissipating part 12 side of the heat sink 10 is cooled entirely and sufficiently by the air flow W and the heated air from the heat dissipating part 12 cart be prevented easily from being discharged to another electronic apparatus side. COPYRIGHT: (C)1996,JPO
9 citations
Patent•
08 May 1995
TL;DR: In this paper, an engine cooling device is provided to increase an airflow and a pressure without lowering fan efficiency and increasing the generation of noise and to provide a construction machine utilizing the engine cooling devices.
Abstract: PURPOSE: To provide an engine cooling device to increase an airflow and a pressure without lowering fan efficiency and increasing the generation of noise and to provide a construction machine utilizing the engine cooling device. CONSTITUTION: Cooling air from the outside of an engine compartment 1 passes through a cooling air intake port 7 to the engine compartment 1. The cooling air is throttled by a suction pipe 8 after the passage of it through an intercooler 6a, an oil cooler 6b, and a radiator 6c and flows in a centrifugal fan 4. Thereafter, the cooling air blown out in an outer peripheral direction through the rotary shroud 4a of the centrifugal fan 4 cools an engine 5 and an oil pan 10 as it flows therethrough and is exhausted through a cooling air exhaust port 9 to the outside of the engine compartment 1.
8 citations
Patent•
05 Oct 1995
TL;DR: In this article, an attracting type air conditioner which can perform air condition ing such as cooling or heating the inside of a cabin while restraining fuel consumption, exhaust of exhaust gas and a noise when a vehicle is stopped is presented.
Abstract: PROBLEM TO BE SOLVED: To provide an attracting type air conditioner which can perform air condition ing such as cooling or heating the inside of a cabin while restraining fuel consumption, exhaust of exhaust gas and a noise when a vehicle is stopped. SOLUTION: A drying agent tank 9 inside which a drying agent 20 is filled is housed in a heat insulating case 42, and a drying agent tank side ventilating passage 22 in which air flows by actuation of a centrifugal fan 46 is formed between the drying agent tank 9 and the heat insulating case 42, and ventilating passage switching dampers 24 and 25 are provided, and a ventilating passage of the drying agent tank side ventilating passage 22 is switched to an indoor heat radiating operation passage and an outdoor heat radiating operation passage. Water 50 is stored inside, and a water tank 10 connected in a valveless shape to the drying agent tank 9 by a connecting pipe 11 is housed in a heat insulating case 71, and a water tank side ventilating passage 52 in which air flows by actuation of a centrifugal fan 76 is formed between a water tank 10 and the heat insulating case 71, and ventilating passage switching dampers 54 and 55 are provided, and a ventilating passage of the water tank side ventilating passage 52 is switched to an indoor cold heat radiating operation passage and an outdoor cold heat radiating operation passage.
8 citations
Patent•
22 Nov 1995
TL;DR: In this paper, the authors describe a damper control system for a centrifugal fan with a rotatable shaft located outside of a fan housing where rotation of the control shaft actuates a plurality of shafts and rods to move an annular damper located within the housing into an open position away from the centrifugal fans blades and to a closed position coaxially over the fan blades thus restricting the flow of air through the fan.
Abstract: A centrifugal fan having a damper control system located away from the air flow path is disclosed. The control system includes a rotatable shaft located outside of a fan housing wherein rotation of the control shaft actuates a plurality of shafts and rods to move an annular damper located within the housing into an open position away from the centrifugal fan blades and to a closed position coaxially over the fan blades thus substantially restricting the flow of air through the centrifugal fan. The dampers are mounted for translation on two support rods located on opposite sides of the centrifugal fan. The dampers ride on a support system including a plurality of ball bearings that are in tangential contact with the support rods thus providing high-pressure contact surfaces between the bearings and the support shafts which act to keep the path of travel of the bearings on the rods free of debris so that the dampers have unobstructed motion between the open and closed positions.
Patent•
18 Oct 1995
TL;DR: In this article, a flow guiding and sound-adsorption device for a centrifugal fan, belonging to the technical field of machines, and comprising a conical shell body and a plurality of sound-absorption paths, is described.
Abstract: The utility model discloses a flow guiding and sound-adsorption device for a centrifugal fan, belonging to the technical field of machines, and comprising a conical shell body and a plurality of sound-absorption paths; the sound-absorption paths are distributed on the surface of the shell body; sound-absorption materials are filled into the cavity of the shell body. The utility model has the function of flow guiding which is effective in reducing the low-frequency eddy noise and the medium-frequency eddy noise of a fan; moreover, the flow guiding and sound-adsorption device for a centrifugal fan has the better function of sound-adsorption which is effective in absorbing the medium-frequency noise and the high-frequency noise of the fan. The utility model is installed in the air inlet of the fan; when the flow guiding and sound-adsorption device for a centrifugal fan is installed, the structure and the external dimensions of the fan are not changed.
Patent•
31 Jan 1995
TL;DR: In this article, an electric device with force air cooling feeding a required amount of air under low noises even when the impedance of a passage is varied by blasting a cooling air with a DC centrifugal fan means without an open loop brush.
Abstract: PURPOSE: To obtain an electric device with force air cooling feeding a required amount of air under low noises even when the impedance of a passage is varied by blasting a cooling air with a DC centrifugal fan means without an open loop brush. CONSTITUTION: The cooling air is blasted on data storage devices 50, 55, 60, 65 of a data storage system 10 positioning in a section 80 and to a plenum with a centrifugal fan 100 driven by the DC motor without the open loop brush via grids 85 or grooves 137 of a front panel 30. The cooling air is entered into the inlet of the fan 100 from the plenum, sent to the part 45 of a chassis 20 housing a power source unit 115 via the outlet of a mounting plate 105, and finally evacuated via the outlet 120 of a back plate 125 or the outlet of the power source unit 115. By this constitution. the electric device with forced air cooling, wherein the flow of the air is regulated to different type units and further tan noises are minimized, is obtained.
Patent•
16 May 1995
TL;DR: In this paper, the shape of a part of a multiblade fan can be modified to deviate the resonance frequency to reduce the vibration and noise while excessive increase of the flow resistance is prevented.
Abstract: PURPOSE:To reduce the vibration and noise while excessive increase of the flow resistance is prevented by slightly changing the shape of a part of a centrifugal multiblade fan to deviate the resonance frequency. CONSTITUTION:A centrifugal fan 14 is provided with a cylindrical supporting part 32 to receive the driving force, a plurality of blades 28 arranged in the circumferential direction, a boss plate 29 to connect the cylindrical supporting part 32 to a plurality of the blades 28, and an annular shroud 30 to connect the upper part of a plurality of the blades 28. The boss plate 29 is curved so that the direction of the air flow is changed from the axial direction of the fan to the outward radial direction of the fan. An annular projection 50 which is projected downward in the vicinity of the end part 29a of the outer circumference of the boss plate is provided to the lower surface on the counter air in-flow side of the boss plate 29. The spring constant (k) of the modal value of the resonance part can be mainly changed by forming the annular projection 50 to increase the rigidity, and the resonance frequency of the fan can be deviated.
Patent•
04 Aug 1995
TL;DR: In this article, a plurality of vents 40 are made between the side face 4a on the delivery side of an axial fan 5 and the side faces 4b on the labyrinth packing 20 side while penetrating the fan boss 4 protruding from the shaft 3 of a rotor 1.
Abstract: PURPOSE:To prevent the outer air containing harmful matters or the lubricant of bearing from intruding into a machine by making a vent through the boss of an axial fan and passing a part of cooling air, delivered from the axial fan, through the vent thereby boosting the pressure of the cooling air through the centrifugal fan action before it is fed to the vestibule of fan. CONSTITUTION:A plurality of vents 40 are made between the side face 4a on the delivery side of an axial fan 5 and the side face 4b on the labyrinth packing 20 side while penetrating the fan boss 4 protruding from the shaft 3 of a rotor 1. The distance of an opening 40b made in the side face 4b from the axis of rotor shaft 3 is set longer than the distance of an opening 40a made in the side face 4a from the axis of the rotor shaft 3 so that an inclination is provided thus directing the vent 40 rearward with respect to the rotational direction. Consequently, the pressure of cooling air on the delivery side of the axial fan 5 is boosted through the centrifugal fan action and then the cooling air flows into the vestibule 23 of fan thus providing a positive pressure therein.
Patent•
24 May 1995
TL;DR: In this paper, a high efficiency light insect killing device was described, consisting of an insect cage, a light support and a fan, which can be used for killing various winged insects.
Abstract: The utility model discloses a high efficiency light insect killing device, relating to an appliance exclusively used for killing winged insects, composed of an insect cage, a light support and a fan. The insect cage forms a cylindrical net cage, the top part forms a lower air duct, and the bottom part is provided with an insect catching net. The bottom part of the light support forms an upper air duct. The upper air duct is sheathed on the upper opening of the insect cage and can slide up and down along the insect cage. The top part of the device is a rain cover. More than three light bulbs with different colors and three radial glass baffle plates are arranged under the rain cover. The fan is a centrifugal fan and is installed on the upper air duct of the bottom part of the light support and driven by a motor. When the fan rotates, the upper opening of the insect cage is opened, and the upper air duct can suck air into the insect cage. The insect killing efficiency of the utility model is high. The utility model can be widely used for killing various winged insects.
Patent•
14 Jan 1995
TL;DR: A disc-shaped fan impeller has several radial blades around its perimeter by which air is centrifuged radially as discussed by the authors, and additional fan blades, on the outer tips of the first blade, directs the air parallel to the axis of the impeller, away from the inlet.
Abstract: The disc-shaped fan impeller has several radial blades around its perimeter by which air is centrifuged radially. An annular cover, and additional fan blades, on the outer tips of the first blade, directs the air parallel to the axis of the impeller, away from the inlet. The fan impeller (7) is attached to a shaft (4), which is rotated by conventional means in the direction of the arrow (6). Fan blades (9) are positioned around the outer section of the disc (7), causing air to be moved in the direction of the arrow (24). An annular cover (10) directs the air downwards in the direction (25) away from the air inlet. Further fan blades (18) on top of the cover (10) discourage air from escaping upwards through the gap (3).
Patent•
05 Apr 1995
TL;DR: A rear view mirror for a vehicle, comprising a hollow body, a reflecting sheet and a device for the removal of water and dirt from the frontal surface of the sheet itself, is constituted essentially by a centrifugal fan housed in the body of the mirror and operable to generate an airstream guided in such a way as to flow over the face of the reflecting sheet as mentioned in this paper.
Abstract: A rear view mirror (1) for a vehicle, comprising a hollow body (2), a reflecting sheet (4) and a device (8) for the removal of water and dirt from the frontal surface (9) of the sheet (4) itself the device (8) is constituted essentially by a centrifugal fan (10) housed in the body (2) of the mirror (1) and operable to generate an airstream guided in such a way as to flow over the face (9) of the reflecting sheet (4)
Patent•
15 Mar 1995
TL;DR: The utility model belongs to a lamp holder with a vent fan as discussed by the authors, where the inner of the holder with exhaust holes is provided with a centrifugal fan, a support frame, a reflective cover, a lamp tube, lamp body, an air sucking hood, etc.
Abstract: The utility model belongs to a lamp holder with a vent fan. Primarily, the inner of the lamp holder with exhaust holes is provided with a centrifugal fan, a support frame, a reflective cover, a lamp tube, a lamp body, an air sucking hood, etc., which are orderly assembled layer by layer, wherein, the upper ring of the air sucking hood is provided with a plurality of air sucking holes used for sucking humid air in bathrooms or odor in washrooms, so that the air can be exhausted via inside gaps, the exhaust holes and pipes communicated outdoors.
Patent•
15 Mar 1995
TL;DR: In this article, a column type water-cooled fan which belongs to the class of fans is arranged in the shape of an upright column, and an automatic head shaking fan cover is arranged between the centrifugal fan and the air outlet of a column wall.
Abstract: The utility model relates to a column type water-cooled fan which belongs to the class of fans. The utility model is in the shape of an upright column. A centrifugal fan of great power is arranged on the upper part of the utility model, and an automatic head shaking fan cover is arranged between the centrifugal fan and the air outlet of a column wall. A vaporizing chamber is arranged in the middle of the column body, and a water storage chamber is arranged on the lower part of the column body. After cooled and wetted in the vaporizing chamber, air is blown into a room according to a certain direction by the fan and the automatic head shaking fan cover.
Patent•
[...]
11 Aug 1995
TL;DR: In this paper, a cylindrical filter element covered with a cylinder cover is provided to improve the efficiency and diffusion in the cleaning of air for a lower noise level by a method wherein an air inlet is arranged radially on a cylinrical base and/or along the perimeter of the cylinear cover while an exhaust port is arranged orthogonal to the inlet along with the perimeter along the top of the cylinder cover.
Abstract: PURPOSE: To improve the efficiency and diffusion in the cleaning of air for a lower noise level by a method wherein a cylindrical filter element covered with a cylindrical cover is provided, an air inlet is arranged radially on a cylindrical base and/or along the perimeter of the cylindrical cover while an exhaust port is arranged orthogonal to the inlet along the perimeter of the top of the cylindrical cover CONSTITUTION: A transportable air cleaner 10 is provided with a cylindrical filter element 15 which is mounted on a round base 20 covered with a cylindrical cover 30 A centrifugal fan 62 mounted in the cover 30 sucks cleaned air into an inlet 36 arranged on the base 20 and the side wall of the cover 30 through the filter element 15 The cleaned air is drawn into the centrifugal fan 62 and then, radially forced out An air varying plate 69 changes the direction of the cleaned air passing through an exhaust port 40 arranged on the top surface 32 of the cylindrical cover 30 again The stream of exhaust is isolated being orthogonal to the flow at the inlet, thereby improving the efficiency in the cleaning of air totally in a chamber
Patent•
[...]
13 Jun 1995
TL;DR: In this paper, an ultrasonic wave was used to facilitate the constitution of a fan having a proper length according to an installing place by fitting blades collectively fixed in the annular body of one centrifugal fan unit in the groove of an adjacent fan unit.
Abstract: PURPOSE: To facilitate the constitution of a centrifugal fan having a proper length according to an installing place by fitting blades collectively fixed in the annular body of one centrifugal fan unit in the groove of an adjacent centrifugal fan unit, and joining this by resin welding using an ultrasonic wave. CONSTITUTION: A number of blades 12 are annularly disposed in an annular body 11, and these are integrally assembled. In the annular body 11, a number of grooves 13 are formed, each guide 14 is projectingly provided between the grooves 13, and an annular guide 15 is formed along the inner peripheral edge of the annular body 11. Each guide 14 has two triangular and inclined peripheral edges and, when the blades 12 constituting one centrifugal fan unit 10 are assembled in the grooves 13 provided in the other adjacent centrifugal fan, the blades 12 are guided by the inclined peripheral edge of the guide 14 for fitting allowing the slight non-alignment of the peripheral surfaces of the blades 12 and the grooves 13.
Patent•
29 Aug 1995
TL;DR: In this paper, an impeller includes a disc-shaped main plate 5 in which five opening parts 8 are formed, and a rotary shaft mount part 7 is provided at the center of the main plate for mounting a motor shaft.
Abstract: PROBLEM TO BE SOLVED: To prevent a motor from suffering from run-out and improve manufacturing efficiency, while keeping performance as a fan. SOLUTION: An impeller 1 includes a disc-shaped main plate 5 in which five opening parts 8 are formed. Five upper blades 6a are fixed radially to a portion on a suction side main plate 5 surface where the opening parts 8 are not formed, and five lower blades are fixed to a portion on a blot-off side main plate 5 surface where it is coincident with the upper blade 6a, putting the main plate 5 therebetween. Further, a rotary shaft mount part 7 is provided at the center of the main plate 5 for mounting a motor shaft.
Patent•
08 Mar 1995
TL;DR: In this article, the utility model of an electrostatic flocking machine is characterized in which the bottom of the flock storing barrel is provided with a feed port; the lower part of the feed port is connected with a centrifugal fan; the feed ports are connected with the air inlet of the centrifugal fans via a feed pipe; the air outlet of the rotating fan is connected to a conveying pipe, and the feed pipe is provided by a fresh air-inlet; this model can feed flock continuously when in use, and has the advantages of enough flock feeding amount
Abstract: The utility model relates to an electrostatic flocking machine, comprising a flock storing barrel, a stirrer, a conveying pipe, a flock spraying barrel and a metal screen. The utility model is characterized in that the bottom of the flock storing barrel is provided with a feed port; the lower part of the feed port is provided with a centrifugal fan; the feed port is connected with the air inlet of the centrifugal fan via a feed pipe; the air outlet of the centrifugal fan is connected with a conveying pipe, the feed pipe is provided with a fresh air inlet. When the utility model is use, the flock powder in the flock storing barrel is transferred into the flock spraying barrel, and attracted onto a gummed flocked object via the field strength produced by a high-voltage generator. The utility model can feed flock continuously when in use, and has the advantages of enough flock feeding amount, even flock spray, favorable effect of flocking, and high efficiency.
Patent•
29 May 1995
TL;DR: In this article, the authors proposed to remove heat generated from the inner elements of an electric machine and to block conduction of heat from an engine as much as possible by providing a rotating field with a centrifugal fan and a ventilation funnel path.
Abstract: PURPOSE: To remove heat generated from the inner elements of an electric machine and to block conduction of heat from an engine as much as possible by providing a rotating field with a centrifugal fan and a ventilation funnel path. CONSTITUTION: A rotor 120 is constituted as a permanent magnet rotating field provided with centrifugal fans 123 closely to the outer circumference of the opposite end faces of a field core 121. The field core 321 is provided with four ventilation paths 121a having sectorial cross-section and a top cover 103, constituting an enclosure together with the housing, is provided with a suction hole 103a and a discharge hole 103b. Upon rotation of the rotor 120, two ventilation paths are formed from the suction hole 103a through the centrifugal fan 123 to the discharge holes 103b, 101a thus cooling the stator 110 and the rotor 120. Furthermore, radial cross-section of the field core 121 is reduced due to existence of the ventilation funnel path 121a and thereby conduction of heat from the output shaft 202 of engine through the inner circumferential part of the field core 123 to the outer circumferential part thereof can be suppressed. COPYRIGHT: (C)1996,JPO
Patent•
22 Nov 1995
TL;DR: In this article, a glass fibre reinforced plastic centrifugal fan was used to replace a steel fan with a glass fiber reinforced plastic fan, which has the advantages of light weight and corrosion resistance; moreover, compared with the steel fan, energy can be saved by more than 5-8% compared with a steel fans.
Abstract: The utility model provides a glass fibre reinforced plastic centrifugal fan which has reasonable structure, high efficiency, low noise and energy saving; the important indexes of the performance such as wind rate, wind pressure, noise, etc of the glass fibre reinforced plastic centrifugal fan totally reach a steel fan in national standards The air inlet pipe for outer connection of the glass fibre reinforced plastic centrifugal fan is provided with a double circuit arc streamline air intake 2; a flow regulating barrel in the spiral casing 3 of a centrifugal fan is sheathed with a flow regulating sleeve ring 4; the radius of the flow regulating sleeve ring 4 is increased gradually to the maximum at the point of an air outlet; the outlet angle of the aerofoil-shaped vanes of the glass fibre reinforced plastic centrifugal fan is 30-40 DEG The structure of the utility model is used; a centrifugal fan made of steel is replaced with a centrifugal fan made of glass fibre reinforced plastic; therefore, the utility model has the advantages of light weight and corrosion resistance; moreover, compared with a steel fan, energy can be saved by more than 5-8%
Patent•
26 Oct 1995
TL;DR: In this paper, a device for handling loose fill foam packing particles comprises a fan assembly (10) having inlet and outlet ports (11, 12) connected to elongate flexible inlet/outlet tubes (13, 14) respectively.
Abstract: A device for handling loose fill foam packing particles comprises a fan assembly (10) having inlet and outlet ports (11, 12) connected to elongate flexible inlet and outlet tubes (13, 14) respectively. A centrifugal fan inside the fan assembly (10) induces a flow of air through the device by means of the venturi effect. The flexible inlet and outlet tubes (13, 14) allow the device to be used either for filling or emptying a container of the foam packing particles.
Patent•
07 Jun 1995
TL;DR: In this article, the authors present a utility model for household use of a centrifugal efflux type fume and oil exhauster for household household use, which is characterized in that a separation chamber and a gas collecting cavity for collecting fume/oil are arranged in a shell body with an air inlet and an exhaust outlet.
Abstract: The utility model discloses a centrifugal efflux type fume and oil exhauster for household use, which is characterized in that a separation chamber and a gas collecting cavity for collecting fume and oil are arranged in a shell body with an air inlet and an exhaust outlet. A blower composed of a motor and a centrifugal fan is arranged in the separation chamber which is provided with the exhaust outlet connected with the fluid air channel. The outlet of the air channel is arranged in the gas collecting cavity. The compressed air generated by the can be directly delivered to the gas collecting cavity through the fluid air channel. A nozzle with reduced diameter can be arranged on the end of the fluid air channel for increasing the exhausting effect. The utility model needs no cleaning because the motor and the centrifugal fan are thoroughly separated from the fume and oil.
Patent•
08 Aug 1995
TL;DR: In this article, a heat resistant protection material is proposed to prevent the burning of an inhaling passage filter and a drop in the gas permeability thereof by forming a heat-resistant protection material laid outside the filter, out of a porous incombustible material having an infinite number of superposed and communicated vent holes, and keeping the average diameter of the holes and the porosity thereof at specified values.
Abstract: PURPOSE:To prevent the burning of an inhaling passage filter and a drop in the gas permeability thereof by forming a heat resistant protection material laid outside the filter, out of a porous incombustible material having an infinite number of superposed and communicated vent holes, and keeping the average diameter of the holes and the porosity thereof at the specified values. CONSTITUTION:A centrifugal fan 14 rotates, driven by a flat type motor 13, and the fresh air thereby drawn passes a heat resistant protection material 12 and a filter 8. The fresh air is further sent in a radial direction and pushes open an air feed valve 5. Then, the fresh air is supplied from an air feed port 15 to the inside of an enclosure 2 for a user's inhalation. The material 12 is inserted in and coupled to a filter cover 9 so as to conceal the whole of the cross sectional plane of a fresh air flow, at a position outside the filter 8 or the fresh air side thereof. The material 12 is made of a porous incombustible material having an infinite number of superposed and communicated vent holes. Also, the average diameter of the holes is taken at 1.0mm or less, and the porosity thereof is made equal to or above 60%.
Patent•
10 Nov 1995
TL;DR: In this article, the authors proposed to reduce a pressure loss and suppress the generation of noise by perpendicularly crossing a centrifugal fan with a diffusing direction of a diffused wind at its rotary shaft axis and so disposing it that its diffusing side is opposed to an air outlet.
Abstract: PURPOSE:To reduce a pressure loss and to suppress the generation of noise by perpendicularly crossing a centrifugal fan with a diffusing direction of a diffused wind at its rotary shaft axis and so disposing it that its diffusing side is opposed to an air outlet CONSTITUTION:An exhaust centrifugal fan 10 and an air supply centrifugal fan 11 are perpendicularly crossed at rotary shaft axes L with diffusing directions X, Y of diffused winds Diffusing sides of the fans 10, 11 are so disposed as to be opposed to air outlets 7, 6 Accordingly, diffused winds in centrifugal directions of the fans 10, 11 are not bent perpendicularly as prior art, and hence pressure losses can be decreased In order to supplement the losses, it is not necessary to increase, for example, numbers of revolutions of the fans 10, 11 As a result, generation of noise can be suppressed Particularly, since the outlets 7, 6 of the centrifugal directions of the fans 10, 11 are opened within a duct joint 15, a silencing effect is provided to further reduce the generation of the noise