US20240102484A1 - Ceiling fan having double-layer blades - Google Patents
Ceiling fan having double-layer blades Download PDFInfo
- Publication number
- US20240102484A1 US20240102484A1 US18/526,606 US202318526606A US2024102484A1 US 20240102484 A1 US20240102484 A1 US 20240102484A1 US 202318526606 A US202318526606 A US 202318526606A US 2024102484 A1 US2024102484 A1 US 2024102484A1
- Authority
- US
- United States
- Prior art keywords
- blades
- blade
- motor
- ceiling fan
- adjacent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010410 layer Substances 0.000 description 16
- 238000001816 cooling Methods 0.000 description 12
- 238000009434 installation Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000035597 cooling sensation Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
Images
Classifications
-
- 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
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/34—Blade mountings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/007—Axial-flow pumps multistage fans
-
- 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
- F04D25/088—Ceiling fans
-
- 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
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
-
- 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
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/601—Mounting; Assembling; Disassembling specially adapted for elastic fluid pumps
Definitions
- the present invention relates to ceiling fans and, more particularly, to ceiling fans having double-layer blades.
- a conventional double-motor ceiling fan structure includes a ceiling fan body. Either side of the ceiling fan body is connected with a motor. Each motor has a motor housing. The motor housing has a plurality of blade holders each provided with a blade. The motors drive the dual-motor ceiling fan structure to rotate the corresponding blades. Compared with a single-motor ceiling fan, the dual-motor ceiling fan structure can generate a greater current of air for cooling.
- ceiling fans having double-layer blades, which increase the current of air for cooling and have the advantages of saving costs and favorably influencing installation costs.
- a ceiling fan having double-layer blades includes a motor unit, a blade frame unit, a first blade unit, and a second blade unit.
- the motor unit includes a motor.
- the motor has a rotating component.
- the blade frame unit has a blade frame body.
- the blade frame body is arranged on an outer peripheral side of the motor.
- the blade frame body is fixedly connected to the rotating component of the motor.
- An upper end of the blade frame body has an upper mounting portion.
- a lower end of the blade frame body has a lower mounting portion.
- the first blade unit includes a plurality of first blades.
- the first blades each have a first fixing portion, a first extension wall, and a first blade portion. The first fixing portions of the first blades are fixed to the upper mounting portion.
- the first extension wall and the first blade portion of each first blade are connected to each other.
- the first extension walls of the first blades extend axially along the blade frame body.
- the first extension walls of the first blades surround an outside of the blade frame body to collectively form a first casing.
- the first casing has a first accommodating space therein.
- the second blade unit includes a plurality of second blades.
- the second blades each have a second fixing portion, a second extension wall, and a second blade portion.
- the second fixing portions of the second blades are fixed to the lower mounting portion.
- the second extension wall and the second blade portion of each second blade are connected to each other.
- the second extension walls of the second blades extend axially along the blade frame body.
- the second extension walls of the second blades surround the outside of the blade frame body to collectively form a second casing.
- the second casing has a second accommodating space therein.
- the first accommodating space of the first casing and the second accommodating space of the second casing are configured to accommodate the blade frame body and the motor.
- the first casing formed by the first blades and the second casing formed by the second blades collectively surround the outside of the blade frame body, so that there is no need for the motor unit to provide a motor housing for connecting the first blade unit and the second blade unit, thereby saving costs and installation costs.
- a ceiling fan constructed and arranged according to the invention includes a motor having a rotating component and blades spaced apart circumferentially about and extending outward radially from the rotating component.
- the blades include upper blades and lower blades. Each lower blade is between and extends below a pair of adjacent upper blades.
- the motor when activated, rotates the rotating component, concurrently rotating the upper blades and the lower blades in the same direction of rotation.
- Each of the upper blades leading an adjacent one of the lower blades is configured to generate and direct an air current rearwardly and downwardly therefrom in front of the adjacent one of the lower blades and each of the lower blades trailing an adjacent one of the upper blades is configured to intercept the air current from the adjacent one of the upper blades and accelerate it rearwardly and downwardly therefrom, when the motor is activated.
- the upper blades are identical.
- the lower blades are identical.
- the upper blades and the lower blades are identical.
- the upper blades and the lower blades define a first casing and a second casing, respectively, surrounding the rotating component.
- the upper blades and the lower blades define a casing surrounding the rotating component.
- a ceiling fan constructed and arranged according to the invention includes a motor including a rotating component and blades spaced apart circumferentially about and extending outward radially from the rotating component.
- the blades include upper blades and lower blades. Each lower blade is between and extends below a pair of adjacent upper blades.
- Each upper blade has a first leading edge, a first trailing edge, and a first deflecting surface between the first leading edge and the first trailing edge.
- Each lower blade has a second leading edge, a second trailing edge, and a second deflecting surface between the second leading edge and the second trailing edge.
- the motor when activated, rotates the rotating component, concurrently rotating the upper blades and the lower blades in the same direction of rotation leading with the first leading edges of the upper blades and the second leading edges of the lower blades.
- Each of the upper blades leading an adjacent one of the lower blades is configured to generate and direct, by its first deflecting surface, an air current rearwardly and downwardly from its trailing edge to in front of the adjacent one of the lower blades and each of the lower blades trailing an adjacent one of the upper blades is configured to intercept, by its second deflecting surface, the air current from the adjacent one of the upper blades and accelerate it, by its second deflecting surface, rearwardly and downwardly from its trailing edge, when the motor is activated.
- the upper blades are identical.
- the lower blades are identical.
- the upper blades and the lower blades are identical.
- the upper blades and the lower blades define a first casing and a second casing, respectively, surrounding the rotating component.
- the upper blades and the lower blades define a casing surrounding the rotating component.
- FIG. 1 is top perspective view of a ceiling fan constructed and arranged according to the invention
- FIG. 2 is a bottom perspective view of the embodiment of FIG. 1 ;
- FIG. 3 is a top plan view of the embodiment of FIG. 1 ;
- FIG. 4 is a side elevation view of the embodiment of FIG. 1 ;
- FIG. 5 is another side elevation view of the embodiment of FIG. 1 ;
- FIG. 6 is an enlarged fragmentary view corresponding to FIG. 4 ;
- FIG. 7 is a partly fragmentary exploded view of the embodiment of FIG. 1 , seen from above;
- FIG. 8 is another partly fragmentary exploded view of the embodiment of FIG. 1 , seen from above;
- FIG. 9 is yet another partly fragmentary exploded view of the embodiment of FIG. 1 , seen from below;
- FIG. 10 is a schematic view showing the installation of the embodiment of FIG. 1 ;
- FIG. 11 is a top perspective view of a ceiling fan constructed and arranged according to the invention.
- FIG. 12 is a bottom perspective view of the embodiment of FIG. 11 ;
- FIG. 13 is a top plan view of the embodiment of FIG. 11 ;
- FIG. 14 is a bottom plan view of the embodiment of FIG. 11 ;
- FIG. 15 is a side elevation view of the embodiment of FIG. 11 ;
- FIG. 16 is an enlarged fragmentary view corresponding to FIG. 15 ;
- FIG. 17 is an enlarged fragmentary view corresponding to FIG. 1 , portions of the ceiling fan broken away for illustrative purposes.
- FIG. 1 is top perspective view of a ceiling fan 100 constructed and arranged according to the invention.
- FIG. 2 is a bottom perspective view of the embodiment of FIG. 1 .
- FIG. 3 is a top plan view of the embodiment of FIG. 1 .
- FIG. 4 is a side elevation view of the embodiment of FIG. 1 .
- FIG. 5 is another side elevation view of the embodiment of FIG. 1 , a view looking between adjacent fan blades of the ceiling fan 100 .
- FIG. 6 is an enlarged fragmentary view corresponding to FIG. 4 .
- FIG. 7 is a partly fragmentary exploded view of the embodiment of FIG. 1 , seen from above.
- the ceiling fan 100 has a motor unit 10 , a blade frame unit 20 , double-layer blades, including a first blade unit 30 and a second blade unit 40 , an upper cover 50 , and a lamp 60 .
- the first blade unit 30 is above the second blade unit 40 . Accordingly, the first blade unit 30 is the ceiling fan's 100 upper blade unit and the second blade unit 40 is the ceiling fan's 100 lower blade unit.
- the motor unit 10 includes a motor 11 .
- the motor 11 has a rotating component 12 .
- An upper retaining portion 13 is fixedly connected to the top of the motor 11 .
- the upper retaining portion 13 is fixedly connected to a down rod 14 , so as to be fixed to the ceiling.
- the upper retaining portion 13 is fixedly connected to the down rod 14 through a connecting seat 15 .
- a lower retaining portion 16 is fixedly connected to the bottom of the motor 11 .
- FIG. 8 is another partly fragmentary exploded view of the embodiment of FIG. 1 , seen from above.
- FIG. 9 is yet another partly fragmentary exploded view of the embodiment of FIG. 1 , seen from below.
- the blade frame unit 20 has a blade frame body 21 .
- the blade frame body 21 is arranged on the outer peripheral side of the motor 11 .
- the blade frame body 21 is fixedly connected to the rotating component 12 of the motor 11 .
- the upper end of the blade frame body 21 has an upper mounting portion 22 .
- the upper mounting portion 22 may be composed of screw holes.
- the lower end of the blade frame body 21 has a lower mounting portion 23 .
- the lower mounting portion 23 may be composed of screw holes.
- the blade frame body 21 has an annular wall 24 .
- the top end of the annular wall 24 has an upper flange 25 extending radially and outwardly.
- the upper mounting portion 22 is disposed on the upper flange 25 .
- the bottom end of the annular wall 24 has a lower flange 26 extending radially and outwardly.
- the lower mounting portion 23 is disposed on the lower flange 26 .
- a motor mounting portion 27 extends from the inner side of the annular wall 24 toward the axis.
- the rotating component 12 of the motor 11 is connected to the motor mounting portion 27 .
- the rotating component 12 rotates, when the motor 11 is activated.
- the first or upper blade unit 30 includes a plurality of first or upper blades 31 .
- the second or lower blade unit 40 includes a plurality of identical second or lower blades 41 .
- the first blades 31 are identical to each other.
- the second blades 41 are identical to each other.
- the first blades 31 and the second blades 41 are identical to each other.
- the first blades 31 are equal in number to the second blades 41 .
- the first blades 31 are spaced apart circumferentially about and extend outward radially from the motor's 11 rotating component 12 and the blade frame unit 20 .
- the second blades 41 are spaced apart circumferentially about and extend outward radially from the motor's 11 rotating component 12 and the blade frame unit 20 .
- the first blades 31 and the second blades 41 are offset circumferentially, in which each first or upper blade 31 is between and extends above the second or lower blades 31 on either side of the ceiling fan 100 , and each second or lower blade 41 is between and extends below the first or upper blades 31 on either side of the ceiling fan 100 .
- the first blades 31 are offset 180 degrees
- the second blades are offset 180 degrees
- each first blade 31 is offset 90 degrees from each adjacent second blade 41 .
- first blades 31 and the second blades 41 alternate circumferentially, are offset 90 degrees from one another, and the second blades 41 extend below the first blades 31 for intercepting and inherently accelerating air currents developed by the first blades 31 when the motor 11 is activated, concurrently rotating the upper blade unit 30 and the lower blade unit 40 .
- Each of the first or upper blades 31 leading an adjacent one of the second or lower blades 41 is configured to generate and direct an air current rearwardly and downwardly therefrom in front of the adjacent one of the second or lower blades 41 and each of the second or lower blades 41 trailing an adjacent one of the first or upper blades 31 is configured to intercept the air current from the adjacent one of the first or upper blades 31 and inherently accelerate it rearwardly and downwardly therefrom, when the motor 11 is activated.
- the first blades 31 each includes a first fixing portion 32 , a first extension wall 33 , and a first blade portion 34 extending outward from the first fixing portion 32 and the first extension wall 33 to a first outer end 70 and, with respect to the motor's 11 rotating component 12 , outward radially from the motor's 11 rotating component 12 to the first outer end 70 .
- the first blade portion 34 of each first blade 31 has a first leading edge 72 and an opposed first trailing edge 74 extending along the length of the first blade portion 34 between the first extension wall 33 and the first outer end 70 .
- the first blade portion 34 of each first blade 31 also has an upward-facing first top surface 76 and an opposed downward-facing first bottom or deflecting surface 78 extending between the first leading edge 72 and the first trailing edge 74 and along the length of the first blade portion 34 between the first extension wall 33 and the first outer end 70 .
- the first blade portion 34 of each first blade 31 has a downward pitch from the first leading edge 72 to the first trailing edge 74 .
- the profile of the first top surface 76 and the profile of the first bottom or deflecting surface 78 of each first blade 31 follow the downward pitch of the first blade portion 34 from the first leading edge 72 to the first trailing edge 74 .
- the first extension wall 33 and the first blade portion 34 of each first blade 31 are connected to each other.
- the first fixing portions 32 of the first blades 31 are fixed to the upper mounting portion 22 .
- the first fixing portions 32 of the first blades 31 may be composed of screw holes, and are locked to the upper mounting portion 22 with screws.
- the first extension walls 33 of the first blades 31 extend axially along the blade frame body 21 .
- the first extension walls 33 of the first blades 31 surround the outside of the blade frame body 21 to collectively form a first casing 35 .
- the first casing 35 has a first accommodating space 36 therein.
- One side of the top of the first extension wall 33 of each first blade 31 , adjacent to the first blade portion 34 , and the first blade portion 34 have a first inner arc portion 37 extending toward the axis of the blade frame body 21 .
- the first inner arc portions 37 are arranged on top of the upper flange 25 so that the upper flange 25 supports the first inner arc portions 37 .
- the first fixing portions 32 of the first blades 31 are disposed on the first inner arc portions 37 , respectively.
- the other side of the top of the first extension wall 33 of each first blade 31 opposite to the first blade portion 34 , is formed with a first edge 38 .
- the first edge 38 of each first blade 31 is lower than the first inner arc portion 37 .
- Each first edge 38 corresponds to the first inner arc portion 37 of the coupled first blade 31 for the first inner arc portion 37 of the coupled first blade 31 to pass therethough.
- One side of the first inner arc portion 37 of each first blade 31 adjacent to the first edge 38 , is provided with a first abutting surface 39 to abut against the first inner arc portion 37 of the coupled first blade 31 .
- the second blades 41 each includes a second fixing portion 42 , a second extension wall 43 , and a second blade portion 44 extending outward from the second fixing portion 42 and the second extension wall 43 to a second outer end 80 and, with respect to the motor's 11 rotating component 12 , outward radially from the motor's 11 rotating component 12 to the second outer end 80 .
- the second blade portion 44 of each second blade 41 has a second leading edge 82 and an opposed second trailing edge 84 extending along the length of the second blade portion 44 between the second extension wall 43 and the second outer end 80 .
- the second blade portion 44 of each second blade 41 also has an upward-facing second top surface 86 and an opposed downward-facing second bottom or deflecting surface 88 extending between the second leading edge 82 and the second trailing edge 84 and along the length of the second blade portion 44 between the second extension wall 43 and the second outer end 80 .
- the second blade portion 44 of each second blade 41 has a downward pitch from the second leading edge 82 to the second trailing edge 84 .
- the profile of the second top surface 86 and the profile of the second bottom or deflecting surface 88 of each second blade 41 follow the downward pitch of the second blade portion 44 from the second leading edge 82 to the second trailing edge 84 .
- the second extension wall 43 and the second blade portion 44 of each second blade 41 are connected to each other.
- the second fixing portions 42 of the second blades 41 are fixed to the lower mounting portion 23 .
- the second fixing portions 42 of the second blades 41 may be composed of screw holes, and are locked to the lower mounting portion 23 with screws.
- the second extension walls 43 of the second blades 41 are adjacent to and beneath the first extension walls 33 of the first blades 31 .
- the second extension wall 43 and the second blade portion 44 of each second blade 41 are connected to each other.
- the second blade portion 44 extends outward from the second extension wall 43 .
- the second extension walls 43 of the second blades 41 extend axially along the blade frame body 21 .
- the second extension walls 43 of the second blades 41 surround the outside of the blade frame body 21 to collectively form a second casing 45 .
- the second casing 45 has a second accommodating space 46 therein.
- the first accommodating space 36 of the first casing 35 and the second accommodating space 46 of the second casing 45 are configured to accommodate the blade frame body 21 and the motor 11 .
- One side of the top of the second extension wall 43 of each second blade 41 , adjacent to the second blade portion 44 , and the second blade portion 44 have a second inner arc portion 47 extending toward the axis of the blade frame body 21 .
- the second inner arc portions 47 are arranged on top of the lower flange 26 so that the lower flange 26 supports the second inner arc portions 47 .
- the second fixing portions 42 of the second blades 41 are disposed on the second inner arc portions 47 , respectively.
- the second edge 48 of each second blade 41 is lower than the second inner arc portion 47 .
- Each second edge 48 corresponds to the second inner arc portion 47 of the coupled second blade 41 for the second inner arc portion 47 of the coupled second blade 41 to pass therethough.
- One side of the second inner arc portion 47 of each second blade 41 adjacent to the second edge 48 , is provided with a second abutting surface 49 to abut against the second inner arc portion 47 of the coupled second blade 41 .
- the first blade portions 34 of the first blades 31 and the second blade portions 44 of the second blades 41 are arranged crosswise.
- the second blade portions 44 of the second blades 41 are adjacent to and beneath the first blade portions 34 of the first blades 31 .
- the upper cover 50 is disposed on the outside of the connecting seat 15 .
- the upper cover 50 is located above the blade frame body 21 .
- the down rod 14 is inserted through the upper cover 50 .
- the upper cover 50 has a flange 51 .
- the flange 51 of the upper cover 50 is located between the first inner arc portions 37 of the first blades 31 .
- the lamp 60 has a lamp module 61 and a lampshade 62 .
- the lamp module 61 is fixedly connected to the lower retaining portion 16 .
- the lampshade 62 is fixed to the outside of the lamp module 61 and located under the second extension walls 43 of the second blades 41 .
- FIG. 10 is a schematic view showing the installation of the embodiment of FIG. 1 .
- the first fixing portions 32 of the first blades 31 are first aligned with the upper mounting portion 22 of the blade frame body 21
- the second fixing portions 42 of the second blades 41 are aligned with the lower mounting portion 23 of the blade frame body 21 .
- the first abutting surface 39 of each first blade 31 abuts against the first inner arc portion 37 of the coupled first blade 31 .
- the second abutting surface 49 of each second blade 41 abuts against the second inner arc portion 47 of the coupled second blade 41 .
- the first extension wall 33 of each first blade 31 abuts against the first extension wall 33 of the coupled first blade 31 .
- each second blade 41 abuts against the second extension wall 43 of the coupled second blade 41 .
- the first fixing portions 32 of the first blades 31 are locked to the upper mounting portion 22 by screws, respectively.
- the second fixing portions 42 of the second blades 41 are locked to the lower mounting portion 23 by screws, respectively.
- the first casing 35 formed by the first blades 31 and the second casing 45 formed by the second blades 41 collectively surround the outside of the blade frame body 21 .
- the blade frame body 21 is accommodated in the first accommodating space 36 and the second accommodating space 46 to quickly complete the assembly of the ceiling fan 100 with double-layer blades.
- the first casing 35 formed by the first blades 31 and the second casing 45 formed by the second blades 41 collectively surround the outside of the blade frame body 21 , so that there is no need for the motor unit 10 to provide a motor housing for connecting the first blade unit 30 and the second blade unit 40 , thereby saving costs and installation costs.
- the ceiling fan 100 having double-layer blades can increase the current of air for cooling.
- the motor 11 when activated, rotates the rotating component 12 in the direction of rotation indicated by arrow A in FIGS. 1 - 6 , concurrently rotating the first or upper blades 31 of the upper blade unit 30 and the second or lower blades 41 of the lower blade unit 40 in the same arrow A direction of rotation leading with the first leading edges 72 of the fist or upper blades 31 and the second leading edges 82 of the second or lower blades 41 .
- the first deflecting surfaces 78 of the first blades 31 and the second deflecting surfaces 88 of the second blades 41 generate downdrafts, streams or currents of air for cooling.
- Arrows C 1 designate the air currents or currents of air from the respective first deflecting surfaces 78 .
- Arrows C 2 designate the air currents or currents of air from the respective second deflecting surfaces 88 .
- the first blades 31 of the upper blade unit 30 produce air currents C 1 that the second blades 41 of the lower blade unit 40 intercept to produce air currents C 2 , when the motor 11 activates.
- the downwardly-pitched profiles of the first bottom or deflecting surface 78 of each first blade 31 and the second bottom surface 88 of each second blade 41 face the arrow A direction of rotation.
- first bottom or deflecting surfaces 78 of the various first blades 31 and the second bottom or deflecting surfaces 88 of the various second blades 41 to produce the downdrafts or air currents that move around the room to produce the cooling sensation, when the motor 11 is activated.
- each of the first blades 31 leading an adjacent one of the lower blades 31 generates and directs, by its first deflecting surface 78 , its air current C 1 rearwardly and downwardly from its trailing edge 74 toward and in front of the adjacent one of the lower blades 41 and each of the lower blades 41 trailing an adjacent one of the upper blades 31 intercepts, by its second deflecting surface 88 , the air current C 1 from the adjacent one of the upper blades 31 and accelerates it, by its second deflecting surface 88 , rearwardly and downwardly from its trailing edge 84 as air current C 2 , when the motor 11 is activated, increasing or otherwise intensifying the currents C 1 or air from the first blades 31 to the comparatively increased or more intense currents C 2 of air from the second blades 41 , according to the invention.
- the upper blades 31 generate air currents C 1 and direct them rearwardly and downwardly to the respective lower blades 41 .
- the lower blades 41 intercept the respective air currents C 1 and accelerate them to the respective air currents C 2 rearwardly and downwardly therefrom, when the motor 11 is activated.
- the lower blades 41 intensify air currents C 1 from the respective upper blades 31 to air currents C 2 , intensified downdrafts, streams or currents C 2 of air for cooling, according to the invention.
- the ceiling fan 100 having the double-layer blades of the present invention develops increased or otherwise more intense currents of air for cooling, according to the invention.
- the upper blades 31 generate air currents and directs them rearwardly and downwardly to the respective lower blades 41 , which intercept and accelerate the respective air currents rearwardly and downwardly therefrom, when the motor 11 is activated.
- FIG. 11 is a top perspective view of a ceiling fan 200 constructed and arranged according to the invention.
- FIG. 12 is a bottom perspective view of the embodiment of FIG. 11
- FIG. 13 is a top plan view of the embodiment of FIG. 11
- FIG. 14 is a bottom plan view of the embodiment of FIG. 11 .
- FIG. 15 is a side elevation view of the embodiment of FIG. 11 .
- FIG. 16 is an enlarged fragmentary view corresponding to FIG. 15 .
- FIG. 17 is an enlarged fragmentary view corresponding to FIG. 1 , portions of the ceiling fan broken away for illustrative purposes.
- the ceiling fan 200 has double-layer blades, including a first blade unit 230 and a second blade unit 240 , an upper cover 250 , a lamp 260 and, in FIG.
- the first blade unit 230 is above the second blade unit 240 . Accordingly, the first blade unit 230 is the ceiling fan's 100 upper blade unit and the second blade unit 240 is the ceiling fan's 100 lower blade unit.
- the motor unit includes a motor 271 .
- the motor 271 has a rotating component 272 .
- the rotating component 272 rotates, when the motor 271 is activated.
- An upper retaining portion 273 is fixedly connected to the top of the motor 271 .
- the upper retaining portion 273 is fixedly connected to a down rod 274 , so as to be fixed to the ceiling.
- the upper retaining portion 273 is fixedly connected to the down rod 274 .
- a standard lower retaining portion concealed by the lamp 260 is fixedly connected to the bottom of the motor 271 .
- the first or upper blade unit 230 includes a plurality of first or upper blades 231 .
- the second or lower blade unit 240 includes a plurality of identical second or lower blades 241 .
- the first blades 231 are identical to each other.
- the second blades 241 are identical to each other.
- the first blades 231 and the second blades 241 are identical to each other.
- the first blades 231 are equal in number to the second blades 241 . In this example, there are four first blades 231 and four second blades 241 .
- the first blades 31 are spaced apart circumferentially about and extend outward radially from the motor's 271 rotating component 272 .
- the second blades 241 are spaced apart circumferentially about and extend outward radially from the motor's 271 rotating component 272 .
- the first blades 231 and the second blades 241 are offset circumferentially, in which each first or upper blade 231 is between and extends above a pair of the second or lower blades 31 , and each second or lower blade 241 is between and extends below a pair of the first or upper blades 231 .
- the first blades 231 are offset 90 degrees
- the second blades are offset 90 degrees
- each first blade 231 is offset 45 degrees from each adjacent second blade 241 .
- first blades 231 and the second blades 241 alternate circumferentially, are offset 45 degrees from one another, and the second blades 241 extend below the first blades 231 for intercepting and inherently accelerating air currents developed by the first blades 231 when the motor 271 is activated, concurrently rotating the upper blade unit 230 and the lower blade unit 240 .
- Each of the first or upper blades 231 leading an adjacent one of the second or lower blades 241 is configured to generate and direct an air current rearwardly and downwardly therefrom in front of the adjacent one of the second or lower blades 241 and each of the second or lower blades 241 trailing an adjacent one of the first or upper blades 231 is configured to intercept the air current from the adjacent one of the first or upper blades 231 and inherently accelerate it rearwardly and downwardly therefrom, when the motor 271 is activated.
- the first blades 231 each includes a first bracket 280 and a first blade portion 290 .
- the first bracket 280 includes a first extension wall 281 and a first connecting arm 282 .
- the first extension wall 281 is on the outer peripheral side of the motor's 271 rotating unit 272 and is connected to the rotating unit 272 with fasteners, such as screws, as is known in the art.
- Each first connecting arm 282 extends outward radially from its first extension wall 281 and the motor's 271 rotating unit 272 to a first distal extremity 283 connected to one of the first blade portions 290 .
- the first blade portion 290 of each first blade 231 has a first inner end 291 and an opposed a first outer end 292 .
- each first blade portion 290 is connected to the first distal extremity 283 of the first connecting arm 282 of one of the first brackets 280 .
- the first blade portion 290 of each first blade 231 extends radially outward from the motor 271 and its rotating component 272 to its first outer end 292 from its first inner end 291 connected to the first distal extremity 283 of the first connecting arm 282 of one of the first brackets 280 .
- the first blade portion 290 of each first blade 231 also includes a first leading edge 293 and an opposed first trailing edge 294 extending along the length of the first blade portion 290 between the first inner end 291 and the first outer end 292 .
- the first blade portion 290 of each first blade 231 also has an upward-facing first top surface 295 and an opposed downward-facing first bottom or deflecting surface 296 extending between the first leading edge 293 and the first trailing edge 294 and along the length of the first blade portion 290 between the first inner end 291 and the first outer end 292 .
- the first blade portion 290 of each first blade 231 has a downward pitch from the first leading edge 293 to the first trailing edge 294 .
- the profile of the first top surface 295 and the profile of the first bottom or deflecting surface 296 of each first blade 231 follow the downward pitch of the first blade portion 290 from the first leading edge 293 to the first trailing edge 294 .
- the first inner end 291 of the first blade portion 290 of each first blade is connected to the first distal extremity 283 of the first connecting arm 282 of one of the first brackets 280 with fasteners 298 , such as screws or nut-and-bolt assemblies that extend through appropriate holes therein, as is known in the art.
- the second blades 241 each includes a second bracket 300 and a second blade portion 310 .
- the second bracket 300 includes a second extension wall 301 and a second connecting arm 302 .
- the second extension wall 301 is on the outer peripheral side of the motor's 271 rotating unit 272 and is connected to the rotating unit 272 with fasteners, such as screws, as is known in the art.
- Each second connecting arm 302 extends outward radially from its second extension wall 301 and the motor's 271 rotating unit 272 to a second distal extremity 303 connected to one of the second blade portions 310 .
- the second blade portion 310 of each second blade 231 has a second inner end 311 and an opposed a second outer end 312 .
- each second blade portion 310 is connected to the second distal extremity 303 of the second connecting arm 302 of one of the second brackets 300 .
- the second blade portion 310 of each second blade 231 extends radially outward from the motor 271 and its rotating component 272 to its second outer end 312 from its second inner end 311 connected to the second distal extremity 303 of the second connecting arm 302 of one of the second brackets 300 .
- the second blade portion 310 of each second blade 231 also includes a second leading edge 313 and an opposed second trailing edge 314 extending along the length of the second blade portion 310 between the second inner end 311 and the second outer end 312 .
- the second blade portion 310 of each second blade 231 also has an upward-facing second top surface 315 and an opposed downward-facing second bottom or deflecting surface 316 extending between the second leading edge 313 and the second trailing edge 314 and along the length of the second blade portion 310 between the second inner end 311 and the second outer end 312 .
- the second blade portion 310 of each second blade 231 has a downward pitch from the second leading edge 313 to the second trailing edge 314 .
- the profile of the second top surface 315 and the profile of the second bottom or deflecting surface 316 of each second blade 231 follow the downward pitch of the second blade portion 310 from the second leading edge 313 to the second trailing edge 314 .
- the second inner end 311 of the second blade portion 310 of each second blade is connected to the second distal extremity 303 of the second connecting arm 302 of one of the second brackets 300 with fasteners 318 , such as screws or nut-and-bolt assemblies that extend through appropriate holes therein, as is known in the art.
- the first extension walls 281 and the second extension walls 301 connected directly to the rotating component 272 of the motor unit 270 surround the outside of the motor's 271 rotating unit 272 to collectively form a casing 320 , so there is no need for the motor unit 270 to provide a motor housing for connecting the first blade unit 330 and the second blade unit 240 , thereby saving costs and installation costs.
- the second connecting arm 302 and the connected second blade portion 290 of each second blade 241 extends below the first connecting arm 282 and the connected first blade portion 290 of each first blade 231 .
- the upper cover 250 covers the motor unit 270 between the upper retaining portion 273 and the casing 320 .
- the down rod 274 is inserted in the upper retaining portion 273 , which extends upright from the upper cover 250 .
- the lamp 260 under the casing 320 is of standard construction and includes as a standard lamp module 261 enclosing a standard lamp module fixedly connected to motor unit's 270 lower retaining portion.
- the ceiling fan 200 having double-layer blades can increase the current of air for cooling.
- the motor 271 when activated, rotates the rotating component 22 in the direction of rotation indicated by arrow B in FIGS. 11 - 17 , concurrently rotating the first or upper blades 231 of the upper blade unit 230 and the second or lower blades 241 of the lower blade unit 240 in the same arrow B direction of rotation leading with the first leading edges 293 of the first or upper blades 231 and the second leading edges 313 of the second or lower blades 241 .
- the first deflecting surfaces 296 of the first blades 231 and the second deflecting surfaces 316 of the second blades 241 generate downdrafts, streams or currents of air for cooling.
- Arrows C 3 designate the air currents or currents of air from the respective first deflecting surfaces 296 .
- Arrows C 4 designate the air currents or currents of air from the respective second deflecting surfaces 316 .
- the first blades 231 of the upper blade unit 330 produce air currents C 3 that the second blades 241 of the lower blade unit 240 intercept to produce air currents C 4 , when the motor 271 activates.
- the downdrafts or air currents move around the room, producing a cooling sensation.
- the downwardly-pitched profiles of the first bottom or deflecting surface 296 of each first blade 231 and the second bottom surface 316 of each second blade 241 face the arrow B direction of rotation.
- first bottom or deflecting surfaces 296 of the various first blades 231 and the second bottom or deflecting surfaces 316 of the various second blades 241 to produce the downdrafts or air currents that move around the room to produce the cooling sensation, when the motor 271 is activated.
- each of the first blades 231 leading an adjacent one of the lower blades 231 generates and directs, by its first deflecting surface 296 , its air current C 3 rearwardly and downwardly from its trailing edge 294 toward and in front of the adjacent one of the lower blades 241 and each of the lower blades 241 trailing an adjacent one of the upper blades 231 intercepts, by its second deflecting surface 316 , the air current C 3 from the adjacent one of the upper blades 231 and accelerates it, by its second deflecting surface 316 , rearwardly and downwardly from its trailing edge 314 as air current C 4 , when the motor 271 is activated, increasing or otherwise intensifying the currents C 3 or air from the first blades 231 to the comparatively increased or more intense currents C 4 of air from the second blades 241 , according to the invention.
- the upper blades 231 generate air currents C 3 and direct them rearwardly and downwardly to the respective lower blades 241 .
- the lower blades 241 intercept the respective air currents C 3 and accelerate them to the respective air currents C 4 rearwardly and downwardly therefrom, when the motor 271 is activated.
- the lower blades 241 intensify air currents C 3 from the respective upper blades 231 to air currents C 4 , intensified downdrafts, streams or currents C 4 of air for cooling, according to the invention.
- the ceiling fan 200 having the double-layer blades of the present invention develops increased or otherwise more intense currents of air for cooling, according to the invention.
- the upper blades 231 generate air currents and directs them rearwardly and downwardly to the respective lower blades 241 , which intercept and accelerate the respective air currents rearwardly and downwardly therefrom, when the motor 271 is activated.
- the ceiling fan 200 has more upper blades than the ceiling fan 100 and more lower blades than the ceiling fan. This inherently allows the ceiling fan 200 to generate more air currents for cooling compared to ceiling fan 100 .
- a ceiling fan constructed and arranged in accordance with the invention can have other equal numbers of upper and lower blades, such as three upper blades and three lower blades, five upper blades and five lower blades, etc.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A ceiling fan has blades spaced apart circumferentially about and extending outward radially from a rotating component of a motor. The blades include upper blades and lower blades. Each lower blade is between and extends below a pair of adjacent upper blades. The motor, when activated, rotates the rotating component, concurrently rotating the upper blades and the lower blades in the same rotational direction. Each of the upper blades leading an adjacent one of the lower blades is configured to generate and direct an air current rearwardly and downwardly therefrom in front of the adjacent one of the lower blades and each of the lower blades trailing an adjacent one of the upper blades is configured to intercept the air current from the adjacent one of the upper blades and accelerate it rearwardly and downwardly therefrom, when the motor is activated.
Description
- The present invention relates to ceiling fans and, more particularly, to ceiling fans having double-layer blades.
- A conventional double-motor ceiling fan structure includes a ceiling fan body. Either side of the ceiling fan body is connected with a motor. Each motor has a motor housing. The motor housing has a plurality of blade holders each provided with a blade. The motors drive the dual-motor ceiling fan structure to rotate the corresponding blades. Compared with a single-motor ceiling fan, the dual-motor ceiling fan structure can generate a greater current of air for cooling.
- However, the above-mentioned dual-motor ceiling fan structure is complicated, cumbersome and expensive. Another conventional dual-motor ceiling fan structure is configured to rotate its blades reversely. This reverse rotation offsets air current and cannot generate more airflow volume. Accordingly, there is an ongoing need to solve these and other problems inherent in the prior art.
- Disclosed are ceiling fans having double-layer blades, which increase the current of air for cooling and have the advantages of saving costs and favorably influencing installation costs.
- Briefly, a ceiling fan having double-layer blades includes a motor unit, a blade frame unit, a first blade unit, and a second blade unit. The motor unit includes a motor. The motor has a rotating component. The blade frame unit has a blade frame body. The blade frame body is arranged on an outer peripheral side of the motor. The blade frame body is fixedly connected to the rotating component of the motor. An upper end of the blade frame body has an upper mounting portion. A lower end of the blade frame body has a lower mounting portion. The first blade unit includes a plurality of first blades. The first blades each have a first fixing portion, a first extension wall, and a first blade portion. The first fixing portions of the first blades are fixed to the upper mounting portion. The first extension wall and the first blade portion of each first blade are connected to each other. The first extension walls of the first blades extend axially along the blade frame body. The first extension walls of the first blades surround an outside of the blade frame body to collectively form a first casing. The first casing has a first accommodating space therein. The second blade unit includes a plurality of second blades. The second blades each have a second fixing portion, a second extension wall, and a second blade portion. The second fixing portions of the second blades are fixed to the lower mounting portion. The second extension wall and the second blade portion of each second blade are connected to each other. The second extension walls of the second blades extend axially along the blade frame body. The second extension walls of the second blades surround the outside of the blade frame body to collectively form a second casing. The second casing has a second accommodating space therein. The first accommodating space of the first casing and the second accommodating space of the second casing are configured to accommodate the blade frame body and the motor. The first casing formed by the first blades and the second casing formed by the second blades collectively surround the outside of the blade frame body, so that there is no need for the motor unit to provide a motor housing for connecting the first blade unit and the second blade unit, thereby saving costs and installation costs. With the multi-layer arrangement of the first blades of the first blade unit and the second blades of the second blade unit, the ceiling fan having double-layer blades can increase the current of air for cooling.
- According to other aspects of the invention, a ceiling fan constructed and arranged according to the invention includes a motor having a rotating component and blades spaced apart circumferentially about and extending outward radially from the rotating component. The blades include upper blades and lower blades. Each lower blade is between and extends below a pair of adjacent upper blades. The motor, when activated, rotates the rotating component, concurrently rotating the upper blades and the lower blades in the same direction of rotation. Each of the upper blades leading an adjacent one of the lower blades is configured to generate and direct an air current rearwardly and downwardly therefrom in front of the adjacent one of the lower blades and each of the lower blades trailing an adjacent one of the upper blades is configured to intercept the air current from the adjacent one of the upper blades and accelerate it rearwardly and downwardly therefrom, when the motor is activated. The upper blades are identical. The lower blades are identical. Preferably, the upper blades and the lower blades are identical. The upper blades and the lower blades define a first casing and a second casing, respectively, surrounding the rotating component. In another embodiment, the upper blades and the lower blades define a casing surrounding the rotating component.
- According to still other aspects of the invention, a ceiling fan constructed and arranged according to the invention includes a motor including a rotating component and blades spaced apart circumferentially about and extending outward radially from the rotating component. The blades include upper blades and lower blades. Each lower blade is between and extends below a pair of adjacent upper blades. Each upper blade has a first leading edge, a first trailing edge, and a first deflecting surface between the first leading edge and the first trailing edge. Each lower blade has a second leading edge, a second trailing edge, and a second deflecting surface between the second leading edge and the second trailing edge. The motor, when activated, rotates the rotating component, concurrently rotating the upper blades and the lower blades in the same direction of rotation leading with the first leading edges of the upper blades and the second leading edges of the lower blades. Each of the upper blades leading an adjacent one of the lower blades is configured to generate and direct, by its first deflecting surface, an air current rearwardly and downwardly from its trailing edge to in front of the adjacent one of the lower blades and each of the lower blades trailing an adjacent one of the upper blades is configured to intercept, by its second deflecting surface, the air current from the adjacent one of the upper blades and accelerate it, by its second deflecting surface, rearwardly and downwardly from its trailing edge, when the motor is activated. The upper blades are identical. The lower blades are identical. Preferably, the upper blades and the lower blades are identical. The upper blades and the lower blades define a first casing and a second casing, respectively, surrounding the rotating component. In another embodiment, the upper blades and the lower blades define a casing surrounding the rotating component.
- Specific objects and advantages of the invention will become apparent to those skilled in the art from the following detailed description of illustrative embodiments thereof, taken in conjunction with the drawings in which:
-
FIG. 1 is top perspective view of a ceiling fan constructed and arranged according to the invention; -
FIG. 2 is a bottom perspective view of the embodiment ofFIG. 1 ; -
FIG. 3 is a top plan view of the embodiment ofFIG. 1 ; -
FIG. 4 is a side elevation view of the embodiment ofFIG. 1 ; -
FIG. 5 is another side elevation view of the embodiment ofFIG. 1 ; -
FIG. 6 is an enlarged fragmentary view corresponding toFIG. 4 ; -
FIG. 7 is a partly fragmentary exploded view of the embodiment ofFIG. 1 , seen from above; -
FIG. 8 is another partly fragmentary exploded view of the embodiment ofFIG. 1 , seen from above; -
FIG. 9 is yet another partly fragmentary exploded view of the embodiment ofFIG. 1 , seen from below; -
FIG. 10 is a schematic view showing the installation of the embodiment ofFIG. 1 ; -
FIG. 11 is a top perspective view of a ceiling fan constructed and arranged according to the invention; -
FIG. 12 is a bottom perspective view of the embodiment ofFIG. 11 ; -
FIG. 13 is a top plan view of the embodiment ofFIG. 11 ; -
FIG. 14 is a bottom plan view of the embodiment ofFIG. 11 ; -
FIG. 15 is a side elevation view of the embodiment ofFIG. 11 ; -
FIG. 16 is an enlarged fragmentary view corresponding toFIG. 15 ; and -
FIG. 17 is an enlarged fragmentary view corresponding toFIG. 1 , portions of the ceiling fan broken away for illustrative purposes. - Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.
-
FIG. 1 is top perspective view of aceiling fan 100 constructed and arranged according to the invention.FIG. 2 is a bottom perspective view of the embodiment ofFIG. 1 .FIG. 3 is a top plan view of the embodiment ofFIG. 1 .FIG. 4 is a side elevation view of the embodiment ofFIG. 1 .FIG. 5 is another side elevation view of the embodiment ofFIG. 1 , a view looking between adjacent fan blades of theceiling fan 100.FIG. 6 is an enlarged fragmentary view corresponding toFIG. 4 .FIG. 7 is a partly fragmentary exploded view of the embodiment ofFIG. 1 , seen from above. Theceiling fan 100 has amotor unit 10, ablade frame unit 20, double-layer blades, including afirst blade unit 30 and asecond blade unit 40, anupper cover 50, and alamp 60. Thefirst blade unit 30 is above thesecond blade unit 40. Accordingly, thefirst blade unit 30 is the ceiling fan's 100 upper blade unit and thesecond blade unit 40 is the ceiling fan's 100 lower blade unit. - The
motor unit 10 includes amotor 11. Themotor 11 has arotating component 12. An upper retainingportion 13 is fixedly connected to the top of themotor 11. Theupper retaining portion 13 is fixedly connected to adown rod 14, so as to be fixed to the ceiling. Theupper retaining portion 13 is fixedly connected to thedown rod 14 through a connectingseat 15. Alower retaining portion 16 is fixedly connected to the bottom of themotor 11. -
FIG. 8 is another partly fragmentary exploded view of the embodiment ofFIG. 1 , seen from above.FIG. 9 is yet another partly fragmentary exploded view of the embodiment ofFIG. 1 , seen from below. Theblade frame unit 20 has ablade frame body 21. Theblade frame body 21 is arranged on the outer peripheral side of themotor 11. Theblade frame body 21 is fixedly connected to therotating component 12 of themotor 11. The upper end of theblade frame body 21 has an upper mountingportion 22. The upper mountingportion 22 may be composed of screw holes. The lower end of theblade frame body 21 has a lower mountingportion 23. The lower mountingportion 23 may be composed of screw holes. Theblade frame body 21 has anannular wall 24. The top end of theannular wall 24 has anupper flange 25 extending radially and outwardly. The upper mountingportion 22 is disposed on theupper flange 25. The bottom end of theannular wall 24 has alower flange 26 extending radially and outwardly. The lower mountingportion 23 is disposed on thelower flange 26. Amotor mounting portion 27 extends from the inner side of theannular wall 24 toward the axis. The rotatingcomponent 12 of themotor 11 is connected to themotor mounting portion 27. The rotatingcomponent 12 rotates, when themotor 11 is activated. - The first or
upper blade unit 30 includes a plurality of first orupper blades 31. The second orlower blade unit 40 includes a plurality of identical second orlower blades 41. Thefirst blades 31 are identical to each other. Thesecond blades 41 are identical to each other. Thefirst blades 31 and thesecond blades 41 are identical to each other. Thefirst blades 31 are equal in number to thesecond blades 41. In this example, there are twofirst blades 31 and twosecond blades 41. Thefirst blades 31 are spaced apart circumferentially about and extend outward radially from the motor's 11rotating component 12 and theblade frame unit 20. Thesecond blades 41 are spaced apart circumferentially about and extend outward radially from the motor's 11rotating component 12 and theblade frame unit 20. Thefirst blades 31 and thesecond blades 41 are offset circumferentially, in which each first orupper blade 31 is between and extends above the second orlower blades 31 on either side of theceiling fan 100, and each second orlower blade 41 is between and extends below the first orupper blades 31 on either side of theceiling fan 100. Thefirst blades 31 are offset 180 degrees, the second blades are offset 180 degrees, and eachfirst blade 31 is offset 90 degrees from each adjacentsecond blade 41. Accordingly, thefirst blades 31 and thesecond blades 41 alternate circumferentially, are offset 90 degrees from one another, and thesecond blades 41 extend below thefirst blades 31 for intercepting and inherently accelerating air currents developed by thefirst blades 31 when themotor 11 is activated, concurrently rotating theupper blade unit 30 and thelower blade unit 40. Each of the first orupper blades 31 leading an adjacent one of the second orlower blades 41 is configured to generate and direct an air current rearwardly and downwardly therefrom in front of the adjacent one of the second orlower blades 41 and each of the second orlower blades 41 trailing an adjacent one of the first orupper blades 31 is configured to intercept the air current from the adjacent one of the first orupper blades 31 and inherently accelerate it rearwardly and downwardly therefrom, when themotor 11 is activated. - The
first blades 31 each includes a first fixingportion 32, afirst extension wall 33, and afirst blade portion 34 extending outward from the first fixingportion 32 and thefirst extension wall 33 to a firstouter end 70 and, with respect to the motor's 11rotating component 12, outward radially from the motor's 11rotating component 12 to the firstouter end 70. Thefirst blade portion 34 of eachfirst blade 31 has a firstleading edge 72 and an opposed first trailingedge 74 extending along the length of thefirst blade portion 34 between thefirst extension wall 33 and the firstouter end 70. Thefirst blade portion 34 of eachfirst blade 31 also has an upward-facing firsttop surface 76 and an opposed downward-facing first bottom or deflectingsurface 78 extending between the first leadingedge 72 and thefirst trailing edge 74 and along the length of thefirst blade portion 34 between thefirst extension wall 33 and the firstouter end 70. Thefirst blade portion 34 of eachfirst blade 31 has a downward pitch from the first leadingedge 72 to thefirst trailing edge 74. The profile of the firsttop surface 76 and the profile of the first bottom or deflectingsurface 78 of eachfirst blade 31 follow the downward pitch of thefirst blade portion 34 from the first leadingedge 72 to thefirst trailing edge 74. Thefirst extension wall 33 and thefirst blade portion 34 of eachfirst blade 31 are connected to each other. Thefirst fixing portions 32 of thefirst blades 31 are fixed to the upper mountingportion 22. Thefirst fixing portions 32 of thefirst blades 31 may be composed of screw holes, and are locked to the upper mountingportion 22 with screws. Thefirst extension walls 33 of thefirst blades 31 extend axially along theblade frame body 21. Thefirst extension walls 33 of thefirst blades 31 surround the outside of theblade frame body 21 to collectively form afirst casing 35. Thefirst casing 35 has a firstaccommodating space 36 therein. One side of the top of thefirst extension wall 33 of eachfirst blade 31, adjacent to thefirst blade portion 34, and thefirst blade portion 34 have a firstinner arc portion 37 extending toward the axis of theblade frame body 21. The firstinner arc portions 37 are arranged on top of theupper flange 25 so that theupper flange 25 supports the firstinner arc portions 37. Thefirst fixing portions 32 of thefirst blades 31 are disposed on the firstinner arc portions 37, respectively. The other side of the top of thefirst extension wall 33 of eachfirst blade 31, opposite to thefirst blade portion 34, is formed with afirst edge 38. Thefirst edge 38 of eachfirst blade 31 is lower than the firstinner arc portion 37. Eachfirst edge 38 corresponds to the firstinner arc portion 37 of the coupledfirst blade 31 for the firstinner arc portion 37 of the coupledfirst blade 31 to pass therethough. One side of the firstinner arc portion 37 of eachfirst blade 31, adjacent to thefirst edge 38, is provided with a first abuttingsurface 39 to abut against the firstinner arc portion 37 of the coupledfirst blade 31. - The
second blades 41 each includes asecond fixing portion 42, asecond extension wall 43, and asecond blade portion 44 extending outward from the second fixingportion 42 and thesecond extension wall 43 to a secondouter end 80 and, with respect to the motor's 11rotating component 12, outward radially from the motor's 11rotating component 12 to the secondouter end 80. Thesecond blade portion 44 of eachsecond blade 41 has a secondleading edge 82 and an opposedsecond trailing edge 84 extending along the length of thesecond blade portion 44 between thesecond extension wall 43 and the secondouter end 80. Thesecond blade portion 44 of eachsecond blade 41 also has an upward-facing secondtop surface 86 and an opposed downward-facing second bottom or deflectingsurface 88 extending between the secondleading edge 82 and thesecond trailing edge 84 and along the length of thesecond blade portion 44 between thesecond extension wall 43 and the secondouter end 80. Thesecond blade portion 44 of eachsecond blade 41 has a downward pitch from the secondleading edge 82 to thesecond trailing edge 84. The profile of the secondtop surface 86 and the profile of the second bottom or deflectingsurface 88 of eachsecond blade 41 follow the downward pitch of thesecond blade portion 44 from the secondleading edge 82 to thesecond trailing edge 84. Thesecond extension wall 43 and thesecond blade portion 44 of eachsecond blade 41 are connected to each other. Thesecond fixing portions 42 of thesecond blades 41 are fixed to the lower mountingportion 23. Thesecond fixing portions 42 of thesecond blades 41 may be composed of screw holes, and are locked to the lower mountingportion 23 with screws. Thesecond extension walls 43 of thesecond blades 41 are adjacent to and beneath thefirst extension walls 33 of thefirst blades 31. Thesecond extension wall 43 and thesecond blade portion 44 of eachsecond blade 41 are connected to each other. Thesecond blade portion 44 extends outward from thesecond extension wall 43. Thesecond extension walls 43 of thesecond blades 41 extend axially along theblade frame body 21. Thesecond extension walls 43 of thesecond blades 41 surround the outside of theblade frame body 21 to collectively form asecond casing 45. Thesecond casing 45 has a secondaccommodating space 46 therein. The firstaccommodating space 36 of thefirst casing 35 and the secondaccommodating space 46 of thesecond casing 45 are configured to accommodate theblade frame body 21 and themotor 11. One side of the top of thesecond extension wall 43 of eachsecond blade 41, adjacent to thesecond blade portion 44, and thesecond blade portion 44 have a secondinner arc portion 47 extending toward the axis of theblade frame body 21. The secondinner arc portions 47 are arranged on top of thelower flange 26 so that thelower flange 26 supports the secondinner arc portions 47. Thesecond fixing portions 42 of thesecond blades 41 are disposed on the secondinner arc portions 47, respectively. The other side of the top of thesecond extension wall 43 of eachsecond blade 41, opposite to thesecond blade portion 44, is formed with asecond edge 48. Thesecond edge 48 of eachsecond blade 41 is lower than the secondinner arc portion 47. Eachsecond edge 48 corresponds to the secondinner arc portion 47 of the coupledsecond blade 41 for the secondinner arc portion 47 of the coupledsecond blade 41 to pass therethough. One side of the secondinner arc portion 47 of eachsecond blade 41, adjacent to thesecond edge 48, is provided with a second abuttingsurface 49 to abut against the secondinner arc portion 47 of the coupledsecond blade 41. In this embodiment of the present invention, thefirst blade portions 34 of thefirst blades 31 and thesecond blade portions 44 of thesecond blades 41 are arranged crosswise. Thesecond blade portions 44 of thesecond blades 41 are adjacent to and beneath thefirst blade portions 34 of thefirst blades 31. - The
upper cover 50 is disposed on the outside of the connectingseat 15. Theupper cover 50 is located above theblade frame body 21. The downrod 14 is inserted through theupper cover 50. Theupper cover 50 has aflange 51. Theflange 51 of theupper cover 50 is located between the firstinner arc portions 37 of thefirst blades 31. - The
lamp 60 has alamp module 61 and alampshade 62. Thelamp module 61 is fixedly connected to thelower retaining portion 16. Thelampshade 62 is fixed to the outside of thelamp module 61 and located under thesecond extension walls 43 of thesecond blades 41. -
FIG. 10 is a schematic view showing the installation of the embodiment ofFIG. 1 . When theceiling fan 100 having double-layer blades is to be assembled, thefirst fixing portions 32 of thefirst blades 31 are first aligned with the upper mountingportion 22 of theblade frame body 21, and thesecond fixing portions 42 of thesecond blades 41 are aligned with the lower mountingportion 23 of theblade frame body 21. The first abuttingsurface 39 of eachfirst blade 31 abuts against the firstinner arc portion 37 of the coupledfirst blade 31. The secondabutting surface 49 of eachsecond blade 41 abuts against the secondinner arc portion 47 of the coupledsecond blade 41. Thefirst extension wall 33 of eachfirst blade 31 abuts against thefirst extension wall 33 of the coupledfirst blade 31. Thesecond extension wall 43 of eachsecond blade 41 abuts against thesecond extension wall 43 of the coupledsecond blade 41. Thefirst fixing portions 32 of thefirst blades 31 are locked to the upper mountingportion 22 by screws, respectively. Thesecond fixing portions 42 of thesecond blades 41 are locked to the lower mountingportion 23 by screws, respectively. Thefirst casing 35 formed by thefirst blades 31 and thesecond casing 45 formed by thesecond blades 41 collectively surround the outside of theblade frame body 21. Theblade frame body 21 is accommodated in the firstaccommodating space 36 and the secondaccommodating space 46 to quickly complete the assembly of theceiling fan 100 with double-layer blades. - In the
ceiling fan 100 having double-layer blades of the present invention, thefirst casing 35 formed by thefirst blades 31 and thesecond casing 45 formed by thesecond blades 41 collectively surround the outside of theblade frame body 21, so that there is no need for themotor unit 10 to provide a motor housing for connecting thefirst blade unit 30 and thesecond blade unit 40, thereby saving costs and installation costs. With the multi-layer arrangement of thefirst blades 31 of thefirst blade unit 30 and thesecond blades 41 of thesecond blade unit 40, theceiling fan 100 having double-layer blades can increase the current of air for cooling. - The
motor 11, when activated, rotates the rotatingcomponent 12 in the direction of rotation indicated by arrow A inFIGS. 1-6 , concurrently rotating the first orupper blades 31 of theupper blade unit 30 and the second orlower blades 41 of thelower blade unit 40 in the same arrow A direction of rotation leading with the firstleading edges 72 of the fist orupper blades 31 and the secondleading edges 82 of the second orlower blades 41. As thefirst blades 31 and thesecond blades 41 rotate concurrently, the first deflecting surfaces 78 of thefirst blades 31 and the second deflecting surfaces 88 of thesecond blades 41 generate downdrafts, streams or currents of air for cooling. Arrows C1 designate the air currents or currents of air from the respective first deflecting surfaces 78. Arrows C2 designate the air currents or currents of air from the respective second deflecting surfaces 88. Thefirst blades 31 of theupper blade unit 30 produce air currents C1 that thesecond blades 41 of thelower blade unit 40 intercept to produce air currents C2, when themotor 11 activates. The downwardly-pitched profiles of the first bottom or deflectingsurface 78 of eachfirst blade 31 and thesecond bottom surface 88 of eachsecond blade 41 face the arrow A direction of rotation. This allows the first bottom or deflectingsurfaces 78 of the variousfirst blades 31 and the second bottom or deflectingsurfaces 88 of the varioussecond blades 41 to produce the downdrafts or air currents that move around the room to produce the cooling sensation, when themotor 11 is activated. - In
FIGS. 2, 4, 5, and 6 , each of thefirst blades 31 leading an adjacent one of thelower blades 31 generates and directs, by itsfirst deflecting surface 78, its air current C1 rearwardly and downwardly from its trailingedge 74 toward and in front of the adjacent one of thelower blades 41 and each of thelower blades 41 trailing an adjacent one of theupper blades 31 intercepts, by itssecond deflecting surface 88, the air current C1 from the adjacent one of theupper blades 31 and accelerates it, by itssecond deflecting surface 88, rearwardly and downwardly from its trailingedge 84 as air current C2, when themotor 11 is activated, increasing or otherwise intensifying the currents C1 or air from thefirst blades 31 to the comparatively increased or more intense currents C2 of air from thesecond blades 41, according to the invention. In short, theupper blades 31 generate air currents C1 and direct them rearwardly and downwardly to the respectivelower blades 41. Thelower blades 41 intercept the respective air currents C1 and accelerate them to the respective air currents C2 rearwardly and downwardly therefrom, when themotor 11 is activated. Thelower blades 41 intensify air currents C1 from the respectiveupper blades 31 to air currents C2, intensified downdrafts, streams or currents C2 of air for cooling, according to the invention. Compared to a standard ceiling fan having single-layer blades, theceiling fan 100 having the double-layer blades of the present invention develops increased or otherwise more intense currents of air for cooling, according to the invention. Theupper blades 31 generate air currents and directs them rearwardly and downwardly to the respectivelower blades 41, which intercept and accelerate the respective air currents rearwardly and downwardly therefrom, when themotor 11 is activated. -
FIG. 11 is a top perspective view of aceiling fan 200 constructed and arranged according to the invention.FIG. 12 is a bottom perspective view of the embodiment ofFIG. 11 ,FIG. 13 is a top plan view of the embodiment ofFIG. 11 .FIG. 14 is a bottom plan view of the embodiment ofFIG. 11 .FIG. 15 is a side elevation view of the embodiment ofFIG. 11 .FIG. 16 is an enlarged fragmentary view corresponding toFIG. 15 .FIG. 17 is an enlarged fragmentary view corresponding toFIG. 1 , portions of the ceiling fan broken away for illustrative purposes. Theceiling fan 200 has double-layer blades, including afirst blade unit 230 and asecond blade unit 240, anupper cover 250, alamp 260 and, inFIG. 17 , amotor unit 270. Thefirst blade unit 230 is above thesecond blade unit 240. Accordingly, thefirst blade unit 230 is the ceiling fan's 100 upper blade unit and thesecond blade unit 240 is the ceiling fan's 100 lower blade unit. - Portions of the
upper cover 250 are broken away inFIG. 17 , illustrating themotor unit 270. The motor unit includes amotor 271. Themotor 271 has arotating component 272. Therotating component 272 rotates, when themotor 271 is activated. Anupper retaining portion 273 is fixedly connected to the top of themotor 271. Theupper retaining portion 273 is fixedly connected to a downrod 274, so as to be fixed to the ceiling. Theupper retaining portion 273 is fixedly connected to thedown rod 274. A standard lower retaining portion concealed by thelamp 260 is fixedly connected to the bottom of themotor 271. - The first or
upper blade unit 230 includes a plurality of first orupper blades 231. The second orlower blade unit 240 includes a plurality of identical second orlower blades 241. Thefirst blades 231 are identical to each other. Thesecond blades 241 are identical to each other. Thefirst blades 231 and thesecond blades 241 are identical to each other. Thefirst blades 231 are equal in number to thesecond blades 241. In this example, there are fourfirst blades 231 and foursecond blades 241. Thefirst blades 31 are spaced apart circumferentially about and extend outward radially from the motor's 271rotating component 272. Thesecond blades 241 are spaced apart circumferentially about and extend outward radially from the motor's 271rotating component 272. Thefirst blades 231 and thesecond blades 241 are offset circumferentially, in which each first orupper blade 231 is between and extends above a pair of the second orlower blades 31, and each second orlower blade 241 is between and extends below a pair of the first orupper blades 231. Thefirst blades 231 are offset 90 degrees, the second blades are offset 90 degrees, and eachfirst blade 231 is offset 45 degrees from each adjacentsecond blade 241. Accordingly, thefirst blades 231 and thesecond blades 241 alternate circumferentially, are offset 45 degrees from one another, and thesecond blades 241 extend below thefirst blades 231 for intercepting and inherently accelerating air currents developed by thefirst blades 231 when themotor 271 is activated, concurrently rotating theupper blade unit 230 and thelower blade unit 240. Each of the first orupper blades 231 leading an adjacent one of the second orlower blades 241 is configured to generate and direct an air current rearwardly and downwardly therefrom in front of the adjacent one of the second orlower blades 241 and each of the second orlower blades 241 trailing an adjacent one of the first orupper blades 231 is configured to intercept the air current from the adjacent one of the first orupper blades 231 and inherently accelerate it rearwardly and downwardly therefrom, when themotor 271 is activated. - The
first blades 231 each includes afirst bracket 280 and afirst blade portion 290. Thefirst bracket 280 includes afirst extension wall 281 and a first connectingarm 282. Thefirst extension wall 281 is on the outer peripheral side of the motor's 271rotating unit 272 and is connected to therotating unit 272 with fasteners, such as screws, as is known in the art. Each first connectingarm 282 extends outward radially from itsfirst extension wall 281 and the motor's 271rotating unit 272 to a firstdistal extremity 283 connected to one of thefirst blade portions 290. Thefirst blade portion 290 of eachfirst blade 231 has a firstinner end 291 and an opposed a firstouter end 292. The firstinner end 291 of eachfirst blade portion 290 is connected to the firstdistal extremity 283 of the first connectingarm 282 of one of thefirst brackets 280. Thefirst blade portion 290 of eachfirst blade 231 extends radially outward from themotor 271 and itsrotating component 272 to its firstouter end 292 from its firstinner end 291 connected to the firstdistal extremity 283 of the first connectingarm 282 of one of thefirst brackets 280. Thefirst blade portion 290 of eachfirst blade 231 also includes a firstleading edge 293 and an opposedfirst trailing edge 294 extending along the length of thefirst blade portion 290 between the firstinner end 291 and the firstouter end 292. Thefirst blade portion 290 of eachfirst blade 231 also has an upward-facing firsttop surface 295 and an opposed downward-facing first bottom or deflectingsurface 296 extending between the firstleading edge 293 and thefirst trailing edge 294 and along the length of thefirst blade portion 290 between the firstinner end 291 and the firstouter end 292. Thefirst blade portion 290 of eachfirst blade 231 has a downward pitch from the firstleading edge 293 to thefirst trailing edge 294. The profile of the firsttop surface 295 and the profile of the first bottom or deflectingsurface 296 of eachfirst blade 231 follow the downward pitch of thefirst blade portion 290 from the firstleading edge 293 to thefirst trailing edge 294. The firstinner end 291 of thefirst blade portion 290 of each first blade is connected to the firstdistal extremity 283 of the first connectingarm 282 of one of thefirst brackets 280 withfasteners 298, such as screws or nut-and-bolt assemblies that extend through appropriate holes therein, as is known in the art. - The
second blades 241 each includes asecond bracket 300 and asecond blade portion 310. Thesecond bracket 300 includes asecond extension wall 301 and a second connectingarm 302. Thesecond extension wall 301 is on the outer peripheral side of the motor's 271rotating unit 272 and is connected to therotating unit 272 with fasteners, such as screws, as is known in the art. Each second connectingarm 302 extends outward radially from itssecond extension wall 301 and the motor's 271rotating unit 272 to a seconddistal extremity 303 connected to one of thesecond blade portions 310. Thesecond blade portion 310 of eachsecond blade 231 has a secondinner end 311 and an opposed a secondouter end 312. The secondinner end 311 of eachsecond blade portion 310 is connected to the seconddistal extremity 303 of the second connectingarm 302 of one of thesecond brackets 300. Thesecond blade portion 310 of eachsecond blade 231 extends radially outward from themotor 271 and itsrotating component 272 to its secondouter end 312 from its secondinner end 311 connected to the seconddistal extremity 303 of the second connectingarm 302 of one of thesecond brackets 300. Thesecond blade portion 310 of eachsecond blade 231 also includes a secondleading edge 313 and an opposedsecond trailing edge 314 extending along the length of thesecond blade portion 310 between the secondinner end 311 and the secondouter end 312. Thesecond blade portion 310 of eachsecond blade 231 also has an upward-facing secondtop surface 315 and an opposed downward-facing second bottom or deflectingsurface 316 extending between the secondleading edge 313 and thesecond trailing edge 314 and along the length of thesecond blade portion 310 between the secondinner end 311 and the secondouter end 312. Thesecond blade portion 310 of eachsecond blade 231 has a downward pitch from the secondleading edge 313 to thesecond trailing edge 314. The profile of the secondtop surface 315 and the profile of the second bottom or deflectingsurface 316 of eachsecond blade 231 follow the downward pitch of thesecond blade portion 310 from the secondleading edge 313 to thesecond trailing edge 314. The secondinner end 311 of thesecond blade portion 310 of each second blade is connected to the seconddistal extremity 303 of the second connectingarm 302 of one of thesecond brackets 300 withfasteners 318, such as screws or nut-and-bolt assemblies that extend through appropriate holes therein, as is known in the art. - The
first extension walls 281 and thesecond extension walls 301 connected directly to therotating component 272 of themotor unit 270 surround the outside of the motor's 271rotating unit 272 to collectively form acasing 320, so there is no need for themotor unit 270 to provide a motor housing for connecting the first blade unit 330 and thesecond blade unit 240, thereby saving costs and installation costs. The secondconnecting arm 302 and the connectedsecond blade portion 290 of eachsecond blade 241 extends below the first connectingarm 282 and the connectedfirst blade portion 290 of eachfirst blade 231. - The
upper cover 250 covers themotor unit 270 between theupper retaining portion 273 and thecasing 320. The downrod 274 is inserted in theupper retaining portion 273, which extends upright from theupper cover 250. Thelamp 260 under thecasing 320 is of standard construction and includes as astandard lamp module 261 enclosing a standard lamp module fixedly connected to motor unit's 270 lower retaining portion. - With the multi-layer arrangement of the
first blades 231 of thefirst blade unit 230 and thesecond blades 241 of thesecond blade unit 240, theceiling fan 200 having double-layer blades can increase the current of air for cooling. - The
motor 271, when activated, rotates the rotatingcomponent 22 in the direction of rotation indicated by arrow B inFIGS. 11-17 , concurrently rotating the first orupper blades 231 of theupper blade unit 230 and the second orlower blades 241 of thelower blade unit 240 in the same arrow B direction of rotation leading with the firstleading edges 293 of the first orupper blades 231 and the secondleading edges 313 of the second orlower blades 241. As thefirst blades 231 and thesecond blades 241 rotate concurrently, the first deflecting surfaces 296 of thefirst blades 231 and the second deflecting surfaces 316 of thesecond blades 241 generate downdrafts, streams or currents of air for cooling. Arrows C3 designate the air currents or currents of air from the respective first deflecting surfaces 296. Arrows C4 designate the air currents or currents of air from the respective second deflecting surfaces 316. Thefirst blades 231 of the upper blade unit 330 produce air currents C3 that thesecond blades 241 of thelower blade unit 240 intercept to produce air currents C4, when themotor 271 activates. The downdrafts or air currents move around the room, producing a cooling sensation. The downwardly-pitched profiles of the first bottom or deflectingsurface 296 of eachfirst blade 231 and the secondbottom surface 316 of eachsecond blade 241 face the arrow B direction of rotation. This allows the first bottom or deflectingsurfaces 296 of the variousfirst blades 231 and the second bottom or deflectingsurfaces 316 of the varioussecond blades 241 to produce the downdrafts or air currents that move around the room to produce the cooling sensation, when themotor 271 is activated. - In
FIGS. 12, 15, and 16 , each of thefirst blades 231 leading an adjacent one of thelower blades 231 generates and directs, by itsfirst deflecting surface 296, its air current C3 rearwardly and downwardly from its trailingedge 294 toward and in front of the adjacent one of thelower blades 241 and each of thelower blades 241 trailing an adjacent one of theupper blades 231 intercepts, by itssecond deflecting surface 316, the air current C3 from the adjacent one of theupper blades 231 and accelerates it, by itssecond deflecting surface 316, rearwardly and downwardly from its trailingedge 314 as air current C4, when themotor 271 is activated, increasing or otherwise intensifying the currents C3 or air from thefirst blades 231 to the comparatively increased or more intense currents C4 of air from thesecond blades 241, according to the invention. In short, theupper blades 231 generate air currents C3 and direct them rearwardly and downwardly to the respectivelower blades 241. Thelower blades 241 intercept the respective air currents C3 and accelerate them to the respective air currents C4 rearwardly and downwardly therefrom, when themotor 271 is activated. Thelower blades 241 intensify air currents C3 from the respectiveupper blades 231 to air currents C4, intensified downdrafts, streams or currents C4 of air for cooling, according to the invention. Compared to a standard ceiling fan having single-layer blades, theceiling fan 200 having the double-layer blades of the present invention develops increased or otherwise more intense currents of air for cooling, according to the invention. Theupper blades 231 generate air currents and directs them rearwardly and downwardly to the respectivelower blades 241, which intercept and accelerate the respective air currents rearwardly and downwardly therefrom, when themotor 271 is activated. - The
ceiling fan 200 has more upper blades than theceiling fan 100 and more lower blades than the ceiling fan. This inherently allows theceiling fan 200 to generate more air currents for cooling compared toceiling fan 100. A ceiling fan constructed and arranged in accordance with the invention can have other equal numbers of upper and lower blades, such as three upper blades and three lower blades, five upper blades and five lower blades, etc. - The present invention is described above with reference to illustrative embodiments. Those skilled in the art will recognize that changes and modifications may be made in the described embodiments without departing from the nature and scope of the present invention. Various changes and modifications to the embodiments herein chosen for purposes of illustration will readily occur to those skilled in the art. To the extent that such modifications and variations do not depart from the invention, they are intended to be included within the scope thereof.
Claims (12)
1. A ceiling fan, comprising:
a motor including a rotating component;
blades spaced apart circumferentially about and extending outward radially from the rotating component, the blades including upper blades and lower blades, each lower blade between and extending below a pair of adjacent upper blades;
the motor, when activated, rotates the rotating component, concurrently rotating the upper blades and the lower blades in the same direction of rotation;
each of the upper blades leading an adjacent one of the lower blades configured to generate and direct an air current rearwardly and downwardly therefrom in front of the adjacent one of the lower blades and each of the lower blades trailing an adjacent one of the upper blades configured to intercept the air current from the adjacent one of the upper blades and accelerate it rearwardly and downwardly therefrom, when the motor is activated.
2. The ceiling fan according to claim 1 , wherein the upper blades are identical.
3. The ceiling fan according to claim 1 , wherein the lower blades are identical.
4. The ceiling fan according to claim 1 , wherein the upper blades and the lower blades are identical.
5. The ceiling fan according to claim 1 , wherein the upper blades and the lower blades define a first casing and a second casing, respectively, surrounding the rotating component.
6. The ceiling fan according to claim 1 , wherein the upper blades and the lower blades define a casing surrounding the rotating component.
7. A ceiling fan, comprising:
a motor including a rotating component;
blades spaced apart circumferentially about and extending outward radially from the rotating component, the blades including upper blades and lower blades, each lower blade between and extending below a pair of adjacent upper blades;
each of the upper blades having a first leading edge, a first trailing edge, and a first deflecting surface between the first leading edge and the first trailing edge;
each of the lower blades having a second leading edge, a second trailing edge, and a second deflecting surface between the second leading edge and the second trailing edge;
the motor, when activated, rotates the rotating component, concurrently rotating the upper blades and the lower blades in the same direction of rotation leading with the first leading edges of the upper blades and the second leading edges of the lower blades; and
each of the upper blades leading an adjacent one of the lower blades configured to generate and direct, by its first deflecting surface, an air current rearwardly and downwardly from its trailing edge to in front of the adjacent one of the lower blades and each of the lower blades trailing an adjacent one of the upper blades configured to intercept, by its second deflecting surface, the air current from the adjacent one of the upper blades and accelerate it, by its second deflecting surface, rearwardly and downwardly from its trailing edge, when the motor is activated.
8. The ceiling fan according to claim 7 , wherein the upper blades are identical.
9. The ceiling fan according to claim 7 , wherein the lower blades are identical.
10. The ceiling fan according to claim 7 , wherein the upper blades and the lower blades are identical.
11. The ceiling fan according to claim 7 , wherein the upper blades and the lower blades define a first casing and a second casing, respectively, surrounding the rotating component.
12. The ceiling fan according to claim 7 , wherein the upper blades and the lower blades define a casing surrounding the rotating component.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/526,606 US20240102484A1 (en) | 2021-11-10 | 2023-12-01 | Ceiling fan having double-layer blades |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17/523,792 US11686321B2 (en) | 2021-11-10 | 2021-11-10 | Ceiling fan having double-layer blades |
US18/339,064 US20230332616A1 (en) | 2021-11-10 | 2023-06-21 | Ceiling fan having double-layer blades |
US18/526,606 US20240102484A1 (en) | 2021-11-10 | 2023-12-01 | Ceiling fan having double-layer blades |
Publications (1)
Publication Number | Publication Date |
---|---|
US20240102484A1 true US20240102484A1 (en) | 2024-03-28 |
Family
ID=86229786
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/523,792 Active US11686321B2 (en) | 2021-11-10 | 2021-11-10 | Ceiling fan having double-layer blades |
US18/339,064 Pending US20230332616A1 (en) | 2021-11-10 | 2023-06-21 | Ceiling fan having double-layer blades |
US18/526,606 Pending US20240102484A1 (en) | 2021-11-10 | 2023-12-01 | Ceiling fan having double-layer blades |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/523,792 Active US11686321B2 (en) | 2021-11-10 | 2021-11-10 | Ceiling fan having double-layer blades |
US18/339,064 Pending US20230332616A1 (en) | 2021-11-10 | 2023-06-21 | Ceiling fan having double-layer blades |
Country Status (1)
Country | Link |
---|---|
US (3) | US11686321B2 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN216111385U (en) * | 2021-10-18 | 2022-03-22 | 佛山市启正电气有限公司 | Mounting structure of ceiling fan and ceiling fan thereof |
USD1016269S1 (en) * | 2022-04-22 | 2024-02-27 | Beacon Lighting International Limited | Ceiling fan |
USD1016268S1 (en) | 2022-04-22 | 2024-02-27 | Beacon Lighting International Limited | Ceiling fan |
USD1015521S1 (en) | 2022-04-22 | 2024-02-20 | Beacon Lighting International Limited | Ceiling fan |
USD1015520S1 (en) * | 2022-04-22 | 2024-02-20 | Beacon Lighting International Limited | Ceiling fan |
USD1015519S1 (en) * | 2022-04-22 | 2024-02-20 | Beacon Lighting International Limited | Ceiling fan |
USD998207S1 (en) * | 2023-03-23 | 2023-09-05 | Foshan Ruideng Lighting Co., Ltd. | Ceiling fan with light |
CN116696857A (en) * | 2023-06-27 | 2023-09-05 | 新盛世机电制品(中山)有限公司 | Connection structure for motor and blade fork of ceiling fan and ceiling fan |
USD1011577S1 (en) * | 2023-08-22 | 2024-01-16 | Bing Liu | Ceiling fan with light |
Citations (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2004571A (en) * | 1931-09-08 | 1935-06-11 | American Machine & Metals | Fan |
US3021696A (en) * | 1960-12-27 | 1962-02-20 | Gen Electric | Vent and exhaust arrangement for air conditioning unit |
US3768546A (en) * | 1971-12-27 | 1973-10-30 | Hudson Products Corp | Axial flow fan assembly |
US20040062654A1 (en) * | 2002-09-27 | 2004-04-01 | Delta Electronics, Inc. | Axial flow fan with multiple segment blades |
US6752587B2 (en) * | 2002-08-07 | 2004-06-22 | Inventec Corporation | Modular fan assembly |
US20050063825A1 (en) * | 2003-09-22 | 2005-03-24 | Sheng-An Yang | Impeller assembly |
US20050249598A1 (en) * | 2004-05-05 | 2005-11-10 | Stanfield Young | Ceiling fan with multiple motors |
US20060276122A1 (en) * | 2005-06-06 | 2006-12-07 | Chung-Yin Cheng | Electric fan |
US20070104583A1 (en) * | 2005-11-10 | 2007-05-10 | Minka Lighting, Inc. | Ceiling fan with integrated fan blades and housing |
US20110020135A1 (en) * | 2008-04-15 | 2011-01-27 | Panasonic Corporation | Ceiling fan |
US20110171021A1 (en) * | 2010-01-14 | 2011-07-14 | Craftmade International, Inc. | Double-Stacked Blade Ceiling Fan And Method Of Operation And Method Of Circulating Air |
US20110174011A1 (en) * | 2010-01-21 | 2011-07-21 | Lg Electronics Inc. | Ventilating device and outdoor unit having the same |
US8025484B2 (en) * | 2008-01-03 | 2011-09-27 | Profan Technology Corp. | Fan rotor assembly |
US20120074712A1 (en) * | 2009-06-01 | 2012-03-29 | Synkinetics,Inc. | Multi-rotor fluid turbine drive with speed converter |
USD661792S1 (en) * | 2009-06-03 | 2012-06-12 | Craftmade International, Inc. | Ceiling fan |
US20130175892A1 (en) * | 2011-07-05 | 2013-07-11 | Siemens Aktiengesellschaft | Electrical machine with two axial fans |
US20140086729A1 (en) * | 2011-04-01 | 2014-03-27 | Envision Strategy Group, Inc. | Method and apparatus for independently varying airflow and noise generation of a fan |
US20140119925A1 (en) * | 2012-11-01 | 2014-05-01 | Air Cool Industrial Co., Ltd. | Ceiling fan |
US8742612B1 (en) * | 2010-12-01 | 2014-06-03 | Associated Energy Technology LLC | Turbine having counter-rotating armature and field |
USD721430S1 (en) * | 2013-03-15 | 2015-01-20 | Minka Lighting, Inc. | Ceiling fan |
US8951012B1 (en) * | 2014-02-10 | 2015-02-10 | JVS Associates, Inc. | Contra-rotating axial fan transmission for evaporative and non-evaporative cooling and condensing equipment |
US9062681B2 (en) * | 2012-07-27 | 2015-06-23 | Msi Computer (Shenzhen) Co., Ltd. | Fan device and vane thereof |
US20150198175A1 (en) * | 2014-01-16 | 2015-07-16 | Hsun-Yu Lin | Ceiling Fan |
US20160131152A1 (en) * | 2014-11-06 | 2016-05-12 | Youngo Limited | Ceiling fan |
US9416982B2 (en) * | 2009-03-12 | 2016-08-16 | Lg Electronics Inc. | Outdoor unit for air conditioner |
US20160319843A1 (en) * | 2015-04-30 | 2016-11-03 | Dennis A. Tracy | Fan optimizing acoustic characteristics |
US9506360B2 (en) * | 2012-08-09 | 2016-11-29 | MTU Aero Engines AG | Continuous-flow machine with at least one guide vane ring |
US9885366B2 (en) * | 2011-01-07 | 2018-02-06 | Minka Lighting, Inc. | Ceiling fan having a single fan blade |
US9995305B2 (en) * | 2013-10-08 | 2018-06-12 | Regal Beloit America, Inc. | Fluid flow apparatus, fan assembly and associated method |
US10202981B2 (en) * | 2015-07-03 | 2019-02-12 | Cooler Master Co., Ltd. | Modular fan blade |
US11209014B2 (en) * | 2019-09-18 | 2021-12-28 | Acer Incorporated | Axial flow fan |
US11208897B2 (en) * | 2018-08-02 | 2021-12-28 | Acer Incorporated | Heat dissipation fan |
US11313377B2 (en) * | 2018-11-30 | 2022-04-26 | Fujitsu General Limited | Propeller fan |
US11493050B2 (en) * | 2018-07-09 | 2022-11-08 | Gd Midea Environment Appliances Mfg Co., Ltd. | Fan |
Family Cites Families (48)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2121073A (en) * | 1935-06-08 | 1938-06-21 | American Machine & Metals | Disk fan |
US2123057A (en) * | 1936-02-29 | 1938-07-05 | United Aircraft Corp | Oppositely rotating coaxial propellers |
US2429061A (en) * | 1943-10-28 | 1947-10-14 | Goodrich Co B F | Counter-rotating propeller assembly |
US2952787A (en) * | 1953-09-08 | 1960-09-13 | Moore Co | Motor for contra rotating fans |
US4478379A (en) * | 1981-05-28 | 1984-10-23 | Canadair Limited | Unmanned remotely piloted aircraft |
US5330323A (en) * | 1993-01-19 | 1994-07-19 | Lamps Plus, Inc. | Ceiling fan |
US5931640A (en) * | 1997-10-17 | 1999-08-03 | Robert Bosch Corporation | Oppositely skewed counter-rotating fans |
US6565334B1 (en) * | 1998-07-20 | 2003-05-20 | Phillip James Bradbury | Axial flow fan having counter-rotating dual impeller blade arrangement |
US6146097A (en) * | 1998-09-14 | 2000-11-14 | Bradt; Gordon E. | Fan blade assembly for use with a ceiling fan drive unit |
US6220906B1 (en) * | 1999-10-04 | 2001-04-24 | The United States Of America As Represented By The Secretary Of The Navy | Marine propulsion assembly |
US6537019B1 (en) * | 2000-06-06 | 2003-03-25 | Intel Corporation | Fan assembly and method |
US6379116B1 (en) * | 2000-09-25 | 2002-04-30 | Jen-Lung David Tai | Impeller and structure for an impeller housing |
US6666660B2 (en) * | 2001-04-27 | 2003-12-23 | The Hoover Company | Motor-fan assembly for a floor cleaning machine |
US6591873B1 (en) * | 2001-11-21 | 2003-07-15 | Air Cruisers Company | Turbo fan aspirator |
US6761144B2 (en) * | 2002-05-17 | 2004-07-13 | Paul A. Schwam | Rotary engine with counter-rotating housing and output shaft mounted on stationary spindle |
USD514694S1 (en) * | 2004-05-05 | 2006-02-07 | Minka Lighting, Inc. | Ceiling fan blade assembly |
USD515686S1 (en) * | 2004-05-05 | 2006-02-21 | Minka Lighting, Inc. | Combination ceiling fan and light fixture |
US20060024165A1 (en) * | 2004-07-30 | 2006-02-02 | Minka Lighting, Inc. | Ceiling fan blade attachment mechanism |
US7083386B2 (en) * | 2004-11-01 | 2006-08-01 | Sunonwealth Electric Machine Industry Co., Ltd. | Fan wheel assembly for connecting multiple hub rings |
US8790085B2 (en) * | 2005-07-13 | 2014-07-29 | Beacon Lighting International Limited | Combined ceiling fan and light fitting |
JP4257365B2 (en) * | 2007-02-07 | 2009-04-22 | Necライティング株式会社 | Ceiling fan with rotor blade |
US20090053059A1 (en) * | 2007-08-20 | 2009-02-26 | Hsieh Lung-Fa | Ceiling fan and manufacturing method thereof |
USD598090S1 (en) * | 2008-08-28 | 2009-08-11 | Chien Luen Industries Co., Ltd., Inc | Dual blade ceiling fan |
JP5273475B2 (en) * | 2008-09-02 | 2013-08-28 | 日本電産株式会社 | Inline axial fan |
JP5256184B2 (en) * | 2009-12-14 | 2013-08-07 | 国立大学法人 東京大学 | Counter-rotating axial fan |
US20120087796A1 (en) * | 2010-10-06 | 2012-04-12 | Mcmahon Joseph | Ceiling fan |
USD678997S1 (en) * | 2011-01-07 | 2013-03-26 | Minka Lighting, Inc. | Ceiling fan |
USD671203S1 (en) * | 2011-03-29 | 2012-11-20 | Air Cool Industrial Co., Ltd. | Combined ceiling fan and light kit |
USD670802S1 (en) * | 2011-03-29 | 2012-11-13 | Air Cool Industrial Co., Ltd. | Ceiling fan blade |
TWI468590B (en) * | 2011-10-21 | 2015-01-11 | Pan Air Electric Co Ltd | Blade structure and ceiling fan employing the same |
US20140072434A1 (en) * | 2012-09-13 | 2014-03-13 | Asia Vital Components Co., Ltd. | Fan impeller structure of centrifugal fan |
USD715419S1 (en) * | 2013-03-15 | 2014-10-14 | Minka Lighting, Inc. | Ceiling fan |
USD715421S1 (en) * | 2013-03-15 | 2014-10-14 | Minka Lighting, Inc. | Ceiling fan blade |
US9726192B2 (en) * | 2015-03-31 | 2017-08-08 | Assa Abloy Entrance Systems Ab | Fan blades and associated blade tips |
WO2016197377A1 (en) * | 2015-06-11 | 2016-12-15 | 北京市鑫全盛商贸有限公司 | Heat dissipation fan |
US10428831B2 (en) * | 2015-07-30 | 2019-10-01 | WLC Enterprises, Inc. | Stepped leading edge fan blade |
JP5905985B1 (en) * | 2015-08-18 | 2016-04-20 | 山洋電気株式会社 | Axial flow fan and serial type axial flow fan |
CA2970867C (en) * | 2016-06-15 | 2020-07-07 | Dl Manufacturing | Compact air moving device |
USD800292S1 (en) * | 2016-09-29 | 2017-10-17 | Hunter Fan Company | Ceiling fan |
USD873404S1 (en) * | 2017-12-28 | 2020-01-21 | Air Cool Industrial Co., Ltd. | Ceiling fan |
CN108506236A (en) * | 2018-05-11 | 2018-09-07 | 宁波生久散热科技有限公司 | Boosting type radiator fan and its application method |
USD916272S1 (en) * | 2018-06-20 | 2021-04-13 | Minka Lighting, Inc. | Ceiling fan blade |
JP7119635B2 (en) * | 2018-06-22 | 2022-08-17 | 日本電産株式会社 | axial fan |
WO2020063551A1 (en) * | 2018-09-27 | 2020-04-02 | 欧普照明股份有限公司 | Invisible fan and fan lamp |
CN209012971U (en) * | 2018-12-25 | 2019-06-21 | 欧普照明股份有限公司 | Fan lamp |
USD933810S1 (en) * | 2019-04-30 | 2021-10-19 | Fanimation, Inc. | Fan blade |
USD933188S1 (en) * | 2019-04-30 | 2021-10-12 | Fanimation, Inc. | Fan assembly |
US11994144B2 (en) * | 2020-10-30 | 2024-05-28 | Dell Products Lp | Blower system with an inner axial fan blade set and an outer centrifugal fan blade set |
-
2021
- 2021-11-10 US US17/523,792 patent/US11686321B2/en active Active
-
2023
- 2023-06-21 US US18/339,064 patent/US20230332616A1/en active Pending
- 2023-12-01 US US18/526,606 patent/US20240102484A1/en active Pending
Patent Citations (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2004571A (en) * | 1931-09-08 | 1935-06-11 | American Machine & Metals | Fan |
US3021696A (en) * | 1960-12-27 | 1962-02-20 | Gen Electric | Vent and exhaust arrangement for air conditioning unit |
US3768546A (en) * | 1971-12-27 | 1973-10-30 | Hudson Products Corp | Axial flow fan assembly |
US6752587B2 (en) * | 2002-08-07 | 2004-06-22 | Inventec Corporation | Modular fan assembly |
US20040062654A1 (en) * | 2002-09-27 | 2004-04-01 | Delta Electronics, Inc. | Axial flow fan with multiple segment blades |
US7025569B2 (en) * | 2002-09-27 | 2006-04-11 | Delta Electronics, Inc. | Axial flow fan with multiple segment blades |
US20050063825A1 (en) * | 2003-09-22 | 2005-03-24 | Sheng-An Yang | Impeller assembly |
US20050249598A1 (en) * | 2004-05-05 | 2005-11-10 | Stanfield Young | Ceiling fan with multiple motors |
US20060276122A1 (en) * | 2005-06-06 | 2006-12-07 | Chung-Yin Cheng | Electric fan |
US7481626B2 (en) * | 2005-11-10 | 2009-01-27 | Minka Lighting, Inc. | Ceiling fan with integrated fan blades and housing |
US20070104583A1 (en) * | 2005-11-10 | 2007-05-10 | Minka Lighting, Inc. | Ceiling fan with integrated fan blades and housing |
US8025484B2 (en) * | 2008-01-03 | 2011-09-27 | Profan Technology Corp. | Fan rotor assembly |
US20110020135A1 (en) * | 2008-04-15 | 2011-01-27 | Panasonic Corporation | Ceiling fan |
US9416982B2 (en) * | 2009-03-12 | 2016-08-16 | Lg Electronics Inc. | Outdoor unit for air conditioner |
US20120074712A1 (en) * | 2009-06-01 | 2012-03-29 | Synkinetics,Inc. | Multi-rotor fluid turbine drive with speed converter |
USD661792S1 (en) * | 2009-06-03 | 2012-06-12 | Craftmade International, Inc. | Ceiling fan |
US20110171021A1 (en) * | 2010-01-14 | 2011-07-14 | Craftmade International, Inc. | Double-Stacked Blade Ceiling Fan And Method Of Operation And Method Of Circulating Air |
US20110174011A1 (en) * | 2010-01-21 | 2011-07-21 | Lg Electronics Inc. | Ventilating device and outdoor unit having the same |
US8742612B1 (en) * | 2010-12-01 | 2014-06-03 | Associated Energy Technology LLC | Turbine having counter-rotating armature and field |
US9885366B2 (en) * | 2011-01-07 | 2018-02-06 | Minka Lighting, Inc. | Ceiling fan having a single fan blade |
US20140086729A1 (en) * | 2011-04-01 | 2014-03-27 | Envision Strategy Group, Inc. | Method and apparatus for independently varying airflow and noise generation of a fan |
US20130175892A1 (en) * | 2011-07-05 | 2013-07-11 | Siemens Aktiengesellschaft | Electrical machine with two axial fans |
US9062681B2 (en) * | 2012-07-27 | 2015-06-23 | Msi Computer (Shenzhen) Co., Ltd. | Fan device and vane thereof |
US9506360B2 (en) * | 2012-08-09 | 2016-11-29 | MTU Aero Engines AG | Continuous-flow machine with at least one guide vane ring |
US20140119925A1 (en) * | 2012-11-01 | 2014-05-01 | Air Cool Industrial Co., Ltd. | Ceiling fan |
USD721430S1 (en) * | 2013-03-15 | 2015-01-20 | Minka Lighting, Inc. | Ceiling fan |
US9995305B2 (en) * | 2013-10-08 | 2018-06-12 | Regal Beloit America, Inc. | Fluid flow apparatus, fan assembly and associated method |
US20150198175A1 (en) * | 2014-01-16 | 2015-07-16 | Hsun-Yu Lin | Ceiling Fan |
US8951012B1 (en) * | 2014-02-10 | 2015-02-10 | JVS Associates, Inc. | Contra-rotating axial fan transmission for evaporative and non-evaporative cooling and condensing equipment |
US20160131152A1 (en) * | 2014-11-06 | 2016-05-12 | Youngo Limited | Ceiling fan |
US20160319843A1 (en) * | 2015-04-30 | 2016-11-03 | Dennis A. Tracy | Fan optimizing acoustic characteristics |
US10202981B2 (en) * | 2015-07-03 | 2019-02-12 | Cooler Master Co., Ltd. | Modular fan blade |
US11493050B2 (en) * | 2018-07-09 | 2022-11-08 | Gd Midea Environment Appliances Mfg Co., Ltd. | Fan |
US11208897B2 (en) * | 2018-08-02 | 2021-12-28 | Acer Incorporated | Heat dissipation fan |
US11313377B2 (en) * | 2018-11-30 | 2022-04-26 | Fujitsu General Limited | Propeller fan |
US11209014B2 (en) * | 2019-09-18 | 2021-12-28 | Acer Incorporated | Axial flow fan |
Also Published As
Publication number | Publication date |
---|---|
US20230143101A1 (en) | 2023-05-11 |
US11686321B2 (en) | 2023-06-27 |
US20230332616A1 (en) | 2023-10-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20240102484A1 (en) | Ceiling fan having double-layer blades | |
CN103671250B (en) | Fan assembly | |
US6158985A (en) | Air fan including waterproof structure | |
WO2012101823A1 (en) | Circulator | |
US5440459A (en) | Ceiling fan having a light assembly | |
JPH1054388A (en) | Centrifugal blower | |
JP3214031U (en) | Lighting device | |
KR20210114300A (en) | Air circulator | |
US8721275B2 (en) | Heat dissipation device | |
KR102100890B1 (en) | Air cleaner | |
CN1643261A (en) | Bidirectional indraft type centrifugal fan and cooling apparatus for computer | |
KR20200056662A (en) | Blowers with BMC motor that increase ventilation volume and minimize vibration noise | |
JPH11264396A (en) | Air blower | |
JP2003214658A (en) | Outdoor unit of air conditioner | |
KR950009143A (en) | Outdoor unit of air conditioner | |
US2441737A (en) | Plastic ventilator fan | |
JP2011127497A (en) | Ceiling fan | |
JP2017180238A (en) | Sirocco fan and centrifugal blower | |
JPH05106592A (en) | Axial flow fan for air-conditioner | |
JP5909628B2 (en) | Fan | |
CN220522826U (en) | Anti-shake bladeless fan lamp | |
EP3779207B1 (en) | Axial flow blade, and blower | |
WO2023188859A1 (en) | Ceiling fan | |
JP2020523520A (en) | Drive assembly for fan and fan with drive assembly for fan | |
WO2024095722A1 (en) | Ventilation device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STPP | Information on status: patent application and granting procedure in general |
Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: NON FINAL ACTION MAILED |