US20080118345A1 - Turbofan and air conditioner having the same - Google Patents
Turbofan and air conditioner having the same Download PDFInfo
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- US20080118345A1 US20080118345A1 US11/782,861 US78286107A US2008118345A1 US 20080118345 A1 US20080118345 A1 US 20080118345A1 US 78286107 A US78286107 A US 78286107A US 2008118345 A1 US2008118345 A1 US 2008118345A1
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- Prior art keywords
- rotating plate
- coupled
- main body
- turbofan
- blade
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
- F25D17/062—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
- F04D25/12—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit being adapted for mounting in apertures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
- F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
- F25D2317/068—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the fans
- F25D2317/0683—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the fans the fans not of the axial type
Definitions
- the present general inventive concept relates to a conventional turbofan and an air conditioner having the same, and more particularly to a turbofan and an air conditioner having the same, capable of reducing blowing noises.
- a conventional turbofan is a type of centrifugal fan, which is adapted to radially blow air in an axial direction, and is used to blow air in a refrigerator, an air conditioner, a vacuum cleaner, etc.
- a turbofan applied to an air conditioner is disclosed in Korean Patent Application Publication No. 2002-19160.
- This turbofan includes a rotating plate having a hub in the middle thereof, a plurality of blades coupled to the rotating plate, and a circular shroud connecting the blades. Further, the turbofan is formed such that an outer diameter of the rotating plate is smaller than an inner diameter of the shroud. This makes it possible to integrally form the rotating plate, the blades, and the shroud by means of ordinary injection molding, and to easily separate the turbofan from a mold after the molding.
- a turbofan is formed such that the outer diameter of a rotating plate 1 is smaller than an inner diameter of a shroud 2 , noise is caused by a vortex generated from a lower outer end 3 a of each of a plurality of blades 3 during operation of the turbofan.
- the turbofan is installed in, for instance, an air conditioner
- the lower outer end 3 a of each of the plurality of blades 3 becomes adjacent to an inner surface of a case 4 of the air conditioner.
- the vortex can cause a blowing noise.
- the blowing noise caused by the vortex can be increased.
- the present general inventive concept provides a turbofan and an air conditioner having the same, capable of reducing blowing noises.
- a turbofan which includes a rotating plate coupled to a shaft of a driving motor, a plurality of blades coupled to an outer circumference of the rotating plate, and an annular shroud coupled to an end of each blade.
- the end of each blade may include an inner end that is coupled to the rotating plate, and an outer end that is not coupled to the rotating plate.
- the outer end of each blade may be tilted toward the rotating plate such that a distance between the outer end of each blade and an inner surface of an apparatus employing the turbofan is increased as the outer end of each blade moves away from a rotational center of the rotating plate in a radial outward direction.
- each blade may have a tilt angle of about 5 degrees to about 15 degrees with respect to the rotating plate.
- the rotating plate, the blades, and the shroud may be integrally formed.
- an air conditioner which includes a main body case, a driving motor fixed to an inner surface of the main body case, a turbofan coupled to a shaft of the driving motor, and a heat exchanger installed around the turbofan in the main body case.
- the turbofan may include a rotating plate coupled to the shaft of the driving motor, a plurality of blades coupled to an outer circumference of the rotating plate, and an annular shroud coupled to an end of each blade.
- the end of each blade may include an inner end that is coupled to the rotating plate, and an outer end that is not coupled to the rotating plate.
- each blade may be tilted toward the rotating plate such that a distance between the outer end of each blade and an inner surface of the main body case is increased as the outer end of each blade moves away from a rotational center of the rotating plate in a radial outward direction.
- a turbofan assembly including a main body, a rotating plate coupled to an inner surface of the main body to rotate on an axis perpendicular to the inner surface, and a plurality of blades coupled to an outer circumference of the rotating plate, each of the plurality of blades including a side closest to the inner surface of the main body which gradually slopes away from the inner surface of the main body as the side extends away from the rotating plate.
- a turbofan assembly including a main body, a rotating plate coupled to an inner surface of the main body to rotate on an axis perpendicular to the inner surface, and a plurality of blades each having an inner side with respect to the main body that includes a first end coupled to an outer circumference of the rotating plate and a second end which is at a distance further from the inner surface of the main body than the first end.
- an air conditioner including a main body case, a driving motor fixed to an inner surface of the main body case, a rotating plate coupled to the driving motor to rotate on an axis perpendicular to the inner surface of the main body case, and a plurality of blades coupled to an outer circumference of the rotating plate, each of the plurality of blades including a side closest to the inner surface of the main body case which gradually slopes away from the inner surface of the main body case as the side extends away from the rotating plate.
- FIG. 1 is a sectional view illustrating a blade structure of a conventional turbofan
- FIG. 2 is a sectional view illustrating a ceiling type air conditioner to which a turbofan according to an embodiment of the present general inventive concept is employed;
- FIG. 3 is a perspective view illustrating a turbofan according to an embodiment of the present general inventive concept
- FIG. 4 is a sectional view illustrating a turbofan according to an embodiment of the present general inventive concept.
- FIG. 5 is a detailed sectional view illustrating a blade structure of a turbofan according to an embodiment the present general inventive concept.
- FIG. 2 is a sectional view illustrating a ceiling type air conditioner to which a turbofan according to the present general inventive concept is employed.
- the air conditioner includes a box-like main body case 10 fitted in a ceiling 100 , and a ceiling panel 20 that is coupled to an open lower surface of the main body case 10 and covers an opening of the ceiling on the circumference thereof.
- the main body case 10 is provided therein with a turbofan 40 to draw air from below the air conditioner in an upward direction through a center portion thereof and discharge the air in a radial direction, and a driving motor 11 to drive the turbofan 40 .
- the driving motor 11 is fixed to an inner upper surface of the main body case 10 .
- a heat exchanger 12 is installed around the turbofan 40 to exchange heat with the air discharged from the turbofan 40 .
- a condensed water drain 13 which may collect and drain condensed water that is generated during exchanging heat, is installed under the heat exchanger 12 .
- the condensed water drain 13 is supported by the ceiling panel 20 .
- the ceiling panel 20 may include an inlet 21 to draw indoor air upward at the center of the air conditioner, and a plurality of narrow long outlets 22 around the inlet 21 . Further, a filter 23 to clean the air may be installed in the inlet 21 of the ceiling panel 20 .
- An air guide plate 24 which includes an opening 24 a at a center portion thereof, is installed inside the filter 23 to guide the drawn air toward the center of the turbofan 40 .
- the turbofan 40 includes a circular rotating plate 41 including a hub 41 a with a center portion thereof coupled to a shaft 11 a of the driving motor 11 , a plurality of blades 42 that are coupled to a front outer circumference of the rotating plate 41 and are disposed in a radial direction, and an annular shroud 43 (see FIG. 4 ) that is coupled to an end of each blade 42 which is opposite to the rotating plate 41 .
- the turbofan 40 may be formed such that an outer diameter D 1 of the rotating plate 41 is equal to or less than an inner diameter D 2 of the shroud 43 .
- Constructing the turbofan 40 according to embodiments of the present general inventive concept is provided so that the diameter D 1 of the rotating plate 41 is equal to or less than an inner diameter D 2 of the shroud 43 prevents an undercut (e.g., a portion where a molded product can not be ejected by means of parallel movement of a mold) from being generated from the mold when the turbofan 40 is molded by injection molding, so that the rotating plate 41 , the blades 42 , and the shroud 43 can be integrally formed.
- an undercut e.g., a portion where a molded product can not be ejected by means of parallel movement of a mold
- an end of each blade 42 which is located on the side of the rotating plate 41 may include an inner end 45 that is coupled to the rotating plate 41 , and an outer end 46 that is not coupled to the rotating plate 41 .
- the outer end 46 of each blade 42 which is located on the side of the rotating plate 41 , may be formed to have a predetermined tilt angle ⁇ with respect to the rotating plate 41 .
- the tilt angle ⁇ may range from approximately 5 degrees to approximately 15 degrees.
- the vortex is generated around the outer end 46 of each blade 42 , and grows stronger and stronger as it moves in a radial outward direction.
- the present general inventive concept is adapted to make the outer end 46 of each blade 42 tilt in proportion to a growth of the vortex, so that the vortex generated around the outer end 46 of each blade 42 can strike the inner surface of the main body case 10 to a minimum extent, thereby reducing the blowing noise.
- the air blown by the turbofan 40 during the operation as described above with reference to FIG. 2 is discharged in a radial direction of the turbofan 40 , and simultaneously toward the outer end 46 of each blade 42 which is located at a side of the rotating plate 41 .
- the vortex generated around the outer end 46 of each blade 42 grows stronger and stronger due to the centrifugal force as it moves in a radial outward direction.
- the present general inventive concept can minimize a collision of the vortex and the inner surface of the main body case 10 , thereby reducing blowing noises.
- a turbofan according to the present general inventive concept can minimize collision of the vortex generated around the outer end of each of the plurality of blades and a main body case, and thereby can reduce a blowing noise.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
Abstract
A turbofan to reduce a blowing noise, and an air conditioner having the same. The turbofan includes a rotating plate coupled to a shaft of a driving motor, a plurality of blades coupled to an outer circumference of the rotating plate, and an annular shroud coupled to an end of each blade. The end of each blade includes an inner end that is coupled to the rotating plate, and an outer end that is not coupled to the rotating plate. The outer end of each blade is tilted toward the rotating plate such that a distance between the outer end of each blade and an inner surface of an apparatus employing the turbofan is increased as the outer end of each blade moves away from a rotational center of the rotating plate in a radial outward direction.
Description
- This application claims priority under 35 U.S.C. § 119(a) from Korean Patent Application No. 2006-114806, filed on Nov. 20, 2006, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference.
- 1. Field of the Invention
- The present general inventive concept relates to a conventional turbofan and an air conditioner having the same, and more particularly to a turbofan and an air conditioner having the same, capable of reducing blowing noises.
- 2. Description of the Related Art
- A conventional turbofan is a type of centrifugal fan, which is adapted to radially blow air in an axial direction, and is used to blow air in a refrigerator, an air conditioner, a vacuum cleaner, etc.
- A turbofan applied to an air conditioner is disclosed in Korean Patent Application Publication No. 2002-19160. This turbofan includes a rotating plate having a hub in the middle thereof, a plurality of blades coupled to the rotating plate, and a circular shroud connecting the blades. Further, the turbofan is formed such that an outer diameter of the rotating plate is smaller than an inner diameter of the shroud. This makes it possible to integrally form the rotating plate, the blades, and the shroud by means of ordinary injection molding, and to easily separate the turbofan from a mold after the molding.
- However, as illustrated in
FIG. 1 , because a turbofan is formed such that the outer diameter of arotating plate 1 is smaller than an inner diameter of ashroud 2, noise is caused by a vortex generated from a lowerouter end 3 a of each of a plurality ofblades 3 during operation of the turbofan. When the turbofan is installed in, for instance, an air conditioner, the lowerouter end 3 a of each of the plurality ofblades 3 becomes adjacent to an inner surface of a case 4 of the air conditioner. Accordingly, because the vortex generated from thelower end 3 a of each of the plurality ofblades 3 hits the inner surface of the case 4, the vortex can cause a blowing noise. In particular, as illustrated inFIG. 1 , when thelower end 3 a of eachblade 3 is parallel to the inner surface of the case 4, the blowing noise caused by the vortex can be increased. - The present general inventive concept provides a turbofan and an air conditioner having the same, capable of reducing blowing noises.
- Additional aspects and utilities of the present general inventive concept will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the general inventive concept.
- The foregoing and/or other aspects and utilities of the present general inventive concept are achieved by providing a turbofan, which includes a rotating plate coupled to a shaft of a driving motor, a plurality of blades coupled to an outer circumference of the rotating plate, and an annular shroud coupled to an end of each blade. The end of each blade may include an inner end that is coupled to the rotating plate, and an outer end that is not coupled to the rotating plate. The outer end of each blade may be tilted toward the rotating plate such that a distance between the outer end of each blade and an inner surface of an apparatus employing the turbofan is increased as the outer end of each blade moves away from a rotational center of the rotating plate in a radial outward direction.
- The outer end of each blade may have a tilt angle of about 5 degrees to about 15 degrees with respect to the rotating plate.
- The rotating plate, the blades, and the shroud may be integrally formed.
- The foregoing and/or other aspects and utilities of the present general inventive concept may also be achieved by providing an air conditioner, which includes a main body case, a driving motor fixed to an inner surface of the main body case, a turbofan coupled to a shaft of the driving motor, and a heat exchanger installed around the turbofan in the main body case. The turbofan may include a rotating plate coupled to the shaft of the driving motor, a plurality of blades coupled to an outer circumference of the rotating plate, and an annular shroud coupled to an end of each blade. The end of each blade may include an inner end that is coupled to the rotating plate, and an outer end that is not coupled to the rotating plate. The outer end of each blade may be tilted toward the rotating plate such that a distance between the outer end of each blade and an inner surface of the main body case is increased as the outer end of each blade moves away from a rotational center of the rotating plate in a radial outward direction.
- The foregoing and/or other aspects and utilities of the present general inventive concept may also be achieved by providing a turbofan assembly, including a main body, a rotating plate coupled to an inner surface of the main body to rotate on an axis perpendicular to the inner surface, and a plurality of blades coupled to an outer circumference of the rotating plate, each of the plurality of blades including a side closest to the inner surface of the main body which gradually slopes away from the inner surface of the main body as the side extends away from the rotating plate.
- The foregoing and/or other aspects and utilities of the present general inventive concept may also be achieved by providing a turbofan assembly, including a main body, a rotating plate coupled to an inner surface of the main body to rotate on an axis perpendicular to the inner surface, and a plurality of blades each having an inner side with respect to the main body that includes a first end coupled to an outer circumference of the rotating plate and a second end which is at a distance further from the inner surface of the main body than the first end.
- The foregoing and/or other aspects and utilities of the present general inventive concept may also be achieved by providing an air conditioner, including a main body case, a driving motor fixed to an inner surface of the main body case, a rotating plate coupled to the driving motor to rotate on an axis perpendicular to the inner surface of the main body case, and a plurality of blades coupled to an outer circumference of the rotating plate, each of the plurality of blades including a side closest to the inner surface of the main body case which gradually slopes away from the inner surface of the main body case as the side extends away from the rotating plate.
- These and/or other aspects and utilities of the present general inventive concept will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
-
FIG. 1 is a sectional view illustrating a blade structure of a conventional turbofan; -
FIG. 2 is a sectional view illustrating a ceiling type air conditioner to which a turbofan according to an embodiment of the present general inventive concept is employed; -
FIG. 3 is a perspective view illustrating a turbofan according to an embodiment of the present general inventive concept; -
FIG. 4 is a sectional view illustrating a turbofan according to an embodiment of the present general inventive concept; and -
FIG. 5 is a detailed sectional view illustrating a blade structure of a turbofan according to an embodiment the present general inventive concept. - Reference will now be made in detail to the embodiments of the present general inventive concept, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. The embodiments are described below in order to explain the present general inventive concept by referring to the figures.
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FIG. 2 is a sectional view illustrating a ceiling type air conditioner to which a turbofan according to the present general inventive concept is employed. As illustrated inFIG. 2 , the air conditioner includes a box-likemain body case 10 fitted in aceiling 100, and aceiling panel 20 that is coupled to an open lower surface of themain body case 10 and covers an opening of the ceiling on the circumference thereof. - The
main body case 10 is provided therein with aturbofan 40 to draw air from below the air conditioner in an upward direction through a center portion thereof and discharge the air in a radial direction, and a drivingmotor 11 to drive theturbofan 40. The drivingmotor 11 is fixed to an inner upper surface of themain body case 10. Further, aheat exchanger 12 is installed around theturbofan 40 to exchange heat with the air discharged from theturbofan 40. A condensedwater drain 13, which may collect and drain condensed water that is generated during exchanging heat, is installed under theheat exchanger 12. The condensedwater drain 13 is supported by theceiling panel 20. - The
ceiling panel 20 may include aninlet 21 to draw indoor air upward at the center of the air conditioner, and a plurality of narrowlong outlets 22 around theinlet 21. Further, afilter 23 to clean the air may be installed in theinlet 21 of theceiling panel 20. Anair guide plate 24, which includes anopening 24 a at a center portion thereof, is installed inside thefilter 23 to guide the drawn air toward the center of theturbofan 40. - As illustrated in
FIGS. 2 through 4 , theturbofan 40 includes a circularrotating plate 41 including ahub 41 a with a center portion thereof coupled to ashaft 11 a of the drivingmotor 11, a plurality ofblades 42 that are coupled to a front outer circumference of therotating plate 41 and are disposed in a radial direction, and an annular shroud 43 (seeFIG. 4 ) that is coupled to an end of eachblade 42 which is opposite to the rotatingplate 41. - As illustrated in
FIGS. 4 and 5 , theturbofan 40 may be formed such that an outer diameter D1 of therotating plate 41 is equal to or less than an inner diameter D2 of theshroud 43. - Constructing the
turbofan 40 according to embodiments of the present general inventive concept is provided so that the diameter D1 of therotating plate 41 is equal to or less than an inner diameter D2 of theshroud 43 prevents an undercut (e.g., a portion where a molded product can not be ejected by means of parallel movement of a mold) from being generated from the mold when theturbofan 40 is molded by injection molding, so that therotating plate 41, theblades 42, and theshroud 43 can be integrally formed. - As illustrated in
FIG. 5 , because theturbofan 40 is formed such that the outer diameter D1 of therotating plate 41 is less than the inner diameter D2 of theshroud 43, an end of eachblade 42 which is located on the side of therotating plate 41 may include aninner end 45 that is coupled to the rotatingplate 41, and anouter end 46 that is not coupled to the rotatingplate 41. Theouter end 46 of eachblade 42, which is located on the side of therotating plate 41, may be formed to have a predetermined tilt angle θ with respect to therotating plate 41. The tilt angle θ may range from approximately 5 degrees to approximately 15 degrees. This makes it possible to minimize a blowing noise caused by a vortex generated around theouter end 46 of eachblade 42 by gradually increasing a distance between theouter end 46 of eachblade 42 and the inner surface of themain body case 10 as theouter end 46 of eachblade 42 moves away from the rotational center of the rotatingplate 41 in a radial outward direction. - When the
turbofan 40 is driven, the vortex is generated around theouter end 46 of eachblade 42, and grows stronger and stronger as it moves in a radial outward direction. The present general inventive concept is adapted to make theouter end 46 of eachblade 42 tilt in proportion to a growth of the vortex, so that the vortex generated around theouter end 46 of eachblade 42 can strike the inner surface of themain body case 10 to a minimum extent, thereby reducing the blowing noise. - Now, reference will be made to an operation of the ceiling type air conditioner to which the turbofan is employed.
- As illustrated in
FIG. 2 , when thedriving motor 11 is driven to rotate theturbofan 40, indoor air is drawn through thecentral inlet 21 of theceiling panel 20. The drawn indoor air is cleaned while passing through thefilter 23, and then flows to theturbofan 40 through the opening 24 a of theair guide plate 24. The air is rotated and discharged toward the circumference of the turbofan 40 (i.e. toward the heat exchanger) by means of the rotational force of theturbofan 40. The air discharged from theturbofan 40 is cooled while passing through theheat exchanger 12, and then is supplied into the indoor space through theoutlets 22 again. - As illustrated in
FIG. 5 , the air blown by theturbofan 40 during the operation as described above with reference toFIG. 2 , is discharged in a radial direction of theturbofan 40, and simultaneously toward theouter end 46 of eachblade 42 which is located at a side of therotating plate 41. At this time, the vortex generated around theouter end 46 of eachblade 42 grows stronger and stronger due to the centrifugal force as it moves in a radial outward direction. Because theouter end 46 of eachblade 42 is tilted in proportion to the growth of the vortex, the present general inventive concept can minimize a collision of the vortex and the inner surface of themain body case 10, thereby reducing blowing noises. - As described in detail above, because an outer end of each of a plurality of blades is tilted in proportion to the growth of a vortex, a turbofan according to the present general inventive concept can minimize collision of the vortex generated around the outer end of each of the plurality of blades and a main body case, and thereby can reduce a blowing noise.
- Although a few embodiments of the present general inventive concept have been shown and described, it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A turbofan, comprising;
a rotating plate coupled to a shaft of a driving motor;
a plurality of blades coupled to an outer circumference of the rotating plate; and
an annular shroud coupled to an end of each blade, the end of each blade including an inner end that is coupled to the rotating plate, and an outer end that is not coupled to the rotating plate,
wherein the outer end of each blade is tilted toward the rotating plate such that a distance between the outer end of each blade and an inner surface of an apparatus employing the turbofan increases as the outer end of each blade moves away from a rotational center of the rotating plate in a radial outward direction.
2. The turbofan of claim 1 , wherein the outer end of each blade has a tilt angle of about 5 degrees to about 15 degrees with respect to the rotating plate.
3. The turbofan of claim 2 , wherein the rotating plate, the blades, and the shroud are integrally formed.
4. An air conditioner, comprising:
a main body case;
a driving motor fixed to an inner surface of the main body case;
a turbofan coupled to a shaft of the driving motor; and
a heat exchanger installed around the turbofan in the main body case,
wherein the turbofan includes a rotating plate coupled to the shaft of the driving motor, a plurality of blades coupled to an outer circumference of the rotating plate, and an annular shroud coupled to an end of each blade wherein the end of each blade includes an inner end that is coupled to the rotating plate, and an outer end that is not coupled to the rotating plate, and
wherein the outer end of each blade is tilted toward the rotating plate such that a distance between the outer end of each blade and an inner surface of the main body case is increased as the outer end of each blade moves away from a rotational center of the rotating plate in a radial outward direction.
5. The air conditioner of claim 4 , wherein the outer end of each blade has a tilt angle of about 5 degrees to about 15 degrees with respect to the rotating plate.
6. The air conditioner of claim 5 , wherein the rotating plate, the blades, and the shroud are integrally formed.
7. A turbofan assembly, comprising:
a main body;
a rotating plate coupled to an inner surface of the main body to rotate on an axis perpendicular to the inner surface; and
a plurality of blades coupled to an outer circumference of the rotating plate, each of the plurality of blades including a side closest to the inner surface of the main body which gradually slopes away from the inner surface of the main body as the side extends away from the rotating plate.
8. A turbofan assembly, comprising:
a main body;
a rotating plate coupled to an inner surface of the main body to rotate on an axis perpendicular to the inner surface; and
a plurality of blades each having an inner side with respect to the main body that includes a first end coupled to an outer circumference of the rotating plate and a second end which is at a distance further from the inner surface of the main body than the first end.
9. An air conditioner, comprising:
a main body case;
a driving motor fixed to an inner surface of the main body case;
a rotating plate coupled to the driving motor to rotate on an axis perpendicular to the inner surface of the main body case; and
a plurality of blades coupled to an outer circumference of the rotating plate, each of the plurality of blades including a side closest to the inner surface of the main body case which gradually slopes away from the inner surface of the main body case as the side extends away from the rotating plate.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2006-114806 | 2006-11-20 | ||
KR1020060114806A KR20080045568A (en) | 2006-11-20 | 2006-11-20 | Turbofan and air conditioner having the same |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080118345A1 true US20080118345A1 (en) | 2008-05-22 |
Family
ID=39417120
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/782,861 Abandoned US20080118345A1 (en) | 2006-11-20 | 2007-07-25 | Turbofan and air conditioner having the same |
Country Status (4)
Country | Link |
---|---|
US (1) | US20080118345A1 (en) |
JP (1) | JP2008128233A (en) |
KR (1) | KR20080045568A (en) |
CN (1) | CN101187383A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120156025A1 (en) * | 2010-12-21 | 2012-06-21 | Minebea Co., Ltd. | Centrifugal fan |
US20120213637A1 (en) * | 2011-02-22 | 2012-08-23 | Samsung Electronics Co., Ltd. | Turbofan of air conditioning system |
US20180105012A1 (en) * | 2015-04-28 | 2018-04-19 | Denso Corporation | Air conditioner for vehicle |
US20180202456A1 (en) * | 2017-01-19 | 2018-07-19 | Nidec Corporation | Blower |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101960150B (en) * | 2008-04-18 | 2014-04-02 | 三菱电机株式会社 | Turbofan and air conditioner |
JP5143173B2 (en) * | 2010-03-29 | 2013-02-13 | 三菱電機株式会社 | Turbo fan and air conditioner indoor unit equipped with the same |
CN104454635B (en) * | 2013-09-18 | 2017-03-08 | 佛山市建准电子有限公司 | Blower fan |
JP6686509B2 (en) * | 2016-02-19 | 2020-04-22 | 株式会社ノーリツ | Blower and hot water supply device including the same |
KR102370822B1 (en) | 2017-05-29 | 2022-03-07 | 엘지전자 주식회사 | turbo fan for ceiling type air conditioner and ceiling type air conditioner having the same |
JP6827486B2 (en) * | 2019-02-25 | 2021-02-10 | シナノケンシ株式会社 | Blower |
GB2585707B (en) * | 2019-07-15 | 2021-08-11 | Dyson Technology Ltd | Variable radial inlet guide vane assembly |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03105873U (en) * | 1990-02-16 | 1991-11-01 | ||
JP2005241018A (en) * | 2004-02-24 | 2005-09-08 | Hitachi Home & Life Solutions Inc | Integral type air conditioner |
-
2006
- 2006-11-20 KR KR1020060114806A patent/KR20080045568A/en not_active Application Discontinuation
-
2007
- 2007-07-25 US US11/782,861 patent/US20080118345A1/en not_active Abandoned
- 2007-08-16 CN CNA200710141897XA patent/CN101187383A/en active Pending
- 2007-08-17 JP JP2007212937A patent/JP2008128233A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120156025A1 (en) * | 2010-12-21 | 2012-06-21 | Minebea Co., Ltd. | Centrifugal fan |
US8834112B2 (en) * | 2010-12-21 | 2014-09-16 | Minebea Co., Ltd. | Centrifugal fan |
US20120213637A1 (en) * | 2011-02-22 | 2012-08-23 | Samsung Electronics Co., Ltd. | Turbofan of air conditioning system |
US8915698B2 (en) * | 2011-02-22 | 2014-12-23 | Samsung Electronics Co., Ltd. | Turbofan of air conditioning system |
US20180105012A1 (en) * | 2015-04-28 | 2018-04-19 | Denso Corporation | Air conditioner for vehicle |
US20180202456A1 (en) * | 2017-01-19 | 2018-07-19 | Nidec Corporation | Blower |
US10859093B2 (en) * | 2017-01-19 | 2020-12-08 | Nidec Corporation | Blower |
Also Published As
Publication number | Publication date |
---|---|
CN101187383A (en) | 2008-05-28 |
JP2008128233A (en) | 2008-06-05 |
KR20080045568A (en) | 2008-05-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SAMSUNG ELECTRONICS CO., LTD., KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHOI, WEON SEOK;SATO, SEIJI;CHO, MIN GI;REEL/FRAME:019608/0344 Effective date: 20070213 |
|
STCB | Information on status: application discontinuation |
Free format text: EXPRESSLY ABANDONED -- DURING EXAMINATION |