JP5163788B2 - Ceiling fan - Google Patents

Description

  The present invention relates to a ceiling fan that is installed on a ceiling and is used for reducing the temperature of the sensible temperature caused by direct wind or circulating indoor air.

  Conventionally, this type of ceiling fan is known to be fixed to a rotating body that is rotated by an electric motor via a connecting member that supports one end of a long blade blade (see, for example, Patent Document 1).

  Hereinafter, the ceiling fan will be described with reference to FIG.

  As shown in the figure, the overall structure of the ceiling fan 101 is composed of a canopy (upper cover) 102, an intermediate cover 103, an outer rotating body 104 and a lower cover 105 of an electric motor, and a blade 107 attached to a holder 106 of the outer rotating body 104. The simple mounting bracket 108 inside the canopy 102 is screwed to the ceiling 109 and the ceiling fan 101 is suspended.

  In the above configuration, the blades 107 are attached at a predetermined angle in the circumferential direction around the rotation axis. When the blades 107 are rotated by the electric motor, the blades 107 are stepped up by the pressure increasing action of the blades 107 in the forward direction. Air that passes between the ceiling 109 and the blade 107 from the outer periphery is blown downward, and in reverse rotation, the air passes from the lower portion of the blade 107 to the outer periphery of the blade 107 through the space between the ceiling 109 and the blade 107, both of which circulate outside. Wind 110 is generated. Therefore, it is used in the forward direction when cool in the vicinity of the ceiling fan 101 mainly in the summer, and vice versa when the air circulation in the whole room is promoted so that the wind is not felt by the direct wind mainly in the winter. Used in rotation.

Japanese Patent Laid-Open No. 11-210678

  In such a conventional ceiling fan, since the space between the blade 107 and the ceiling 109 is narrow, the air passing between the ceiling 109 and the blade 107 from the outer periphery of the blade 107 reaches the inner periphery of the blade 107 during forward rotation. It is difficult to perform the air blowing work mainly in the outer peripheral side region of the blade 107, so the air blowing efficiency is poor, the reachable range of the air blowing is narrow, and the outside circulation returns from the outer peripheral side region of the blade 107 to the outer periphery of the blade 107. Since the wind 110 is generated, there is a problem that the wind speed is low near the center of the ceiling fan 101. When rotating in the forward direction, the air blow works also in the inner peripheral side region of the blade 107, and the blowing efficiency is good. The range is wide, and it is required to increase the wind speed even near the center of the ceiling fan 101.

  In addition, since the distance between the blade 107 and the ceiling 109 is narrow, the air sent between the ceiling 109 and the blade 107 from below the blade 107 in the inner peripheral region of the blade 107 during reverse rotation is discharged to the outer periphery of the blade 107. Therefore, the amount of work in the inner peripheral region of the blade 107 is reduced, the blowing efficiency is lowered and the reachable range of the blowing is narrowed, and the air sent between the ceiling 109 and the blade 107 from below the blade 107 is once Since it blows to the outer peripheral side after hitting the ceiling surface, there is a problem that the circulating air speed becomes low and the reachable range of the airflow becomes narrow, and the airflow efficiency is also achieved by the work of airflow even in the inner peripheral side region of the blade 107 at the time of reverse rotation Therefore, the wind speed of the circulating air blown from the blade 107 to the outer periphery is high, and it is required to widen the reach range of the air blow.

  In addition, there is a problem that dust or the like accumulated in the room by air blown from the ceiling fan 101 is scattered and pollutes the indoor air, and it is required to add a function for improving the indoor air quality. .

  The present invention solves such a conventional problem, and also works on the inner peripheral side region of the slats to perform blowing work, has high blowing efficiency, has a wide range of blowing, and has a ceiling fan when rotating in the forward direction. Provided is a ceiling fan that can increase the wind speed even near the center, can increase the speed of circulating air blown from the blades to the outer periphery during reverse rotation, and can improve indoor air quality The purpose is that.

  In order to achieve the above object, the ceiling fan of the present invention has an attaching means for fixing one end of the rotating shaft to the ceiling surface side, an electric motor rotating around the rotating shaft, and a main body containing all or part of the electric motor. The ceiling fan is provided with a vane plate fixed to an electric motor through an arm portion, and the vane plate rotates together with the electric motor to blow air, and part or all of the vane plate is composed of an upper plate and a lower plate, The ceiling fan is provided with an air passage space having openings on the inner and outer peripheral sides of the plate.

  By this means, the air on the inner peripheral side can be blown out to the outer peripheral side through the air passage space, the inner circulation wind is generated, and the air is blown even in the inner peripheral side region of the periphery and the air blowing efficiency is improved. Thus, a ceiling fan capable of widening the reach range of the blast is obtained.

  Another means is a ceiling fan in which the inner diameter Dti of the upper plate of the slats is larger than the inner diameter Dbi of the lower plate.

  By this means, air on the inner peripheral side can easily flow into the inner opening during reverse rotation, and can be blown out to the outer peripheral side through the air passage space, and the wind speed of the circulating air blown from the blades to the outer periphery can be increased. A ceiling fan that can be used.

  Another means is a ceiling fan in which the inner diameter Dti of the upper plate of the slats is smaller than the inner diameter Dbi of the lower plate.

  By this means, the air on the inner peripheral side can easily flow into the inner opening when rotating in the forward direction, and can be blown out to the outer peripheral side through the air passage space. A ceiling fan is obtained that has good blowing efficiency and can widen the reach of the blowing.

  Another means is that the upper plate of the slats is fixed to the electric motor via an arm part, and the joint between the arm part and the slats is a ceiling fan at the boundary between the inner peripheral side region and the outer peripheral side region of the slats. It is a thing.

  By this means, the air blowing work is performed even in the inner peripheral side region of the slats, the air blowing efficiency is good, the reachable range of the air blowing can be widened, and the wind speed can also be increased near the central portion of the ceiling fan. A ceiling fan is obtained.

  Another means is a ceiling fan having an air quality improvement function in the air passage space of the slats.

  By this means, it is possible to obtain a ceiling fan that can improve indoor air that is contaminated by scattering of dust and the like due to the operation of the ceiling fan.

  Another means is a ceiling fan whose air quality improvement function is dust collection by a filter.

  By this means, it is possible to obtain a ceiling fan that can be improved by collecting indoor air, which is contaminated by scattering of dust and the like by the operation of the ceiling fan, with a filter.

  The other means is a ceiling fan whose air quality improving function is aromatic.

  By this means, it is possible to obtain a ceiling fan that can improve unpleasant odor by aroma the indoor air polluted with odor due to scattering of dust and the like by the operation of the ceiling fan.

  According to the present invention, the air blowing work is good even in the inner peripheral side region of the slats, the air blowing efficiency is good, the air reaching range is wide, and the wind speed is increased near the center of the ceiling fan when rotating in the forward direction. Thus, it is possible to provide a ceiling fan that can increase the speed of the circulating air blown from the blades to the outer periphery during reverse rotation and improve the indoor air quality.

The perspective view which shows the ceiling fan of the reference form 1 of this invention The side view which shows the ceiling fan of the reference form 1 of this invention The fragmentary perspective view which shows the ceiling fan of the reference form 1 of this invention The perspective view which shows the ceiling fan of the reference form 2 of this invention The side view which shows the ceiling fan of the reference form 3 of this invention The side view which shows the ceiling fan of the reference form 4 of this invention (A) The perspective view which shows the ceiling fan of the reference form 5 of this invention, (b) The front view The fragmentary perspective view which shows the ceiling fan of the reference form 6 of this invention The fragmentary perspective view which shows the ceiling fan of the reference form 6 of this invention The perspective view which shows the ceiling fan of Embodiment 1 of this invention The side view which shows the ceiling fan of Embodiment 1 of this invention (A) The perspective view which shows the ceiling fan of Embodiment 2 of this invention, (b) The top view (A) The perspective view which shows the ceiling fan of Embodiment 3 of this invention, (b) The bottom view The perspective view which shows the ceiling fan of Embodiment 4 of this invention The fragmentary perspective view which shows the ceiling fan of Embodiment 5, 6 of this invention The fragmentary perspective view which shows the ceiling fan of Embodiment 7 of this invention Side view showing a conventional ceiling fan

  According to the first aspect of the present invention, there is provided an attachment means for fixing one end of the rotating shaft to the ceiling surface side, an electric motor rotating around the rotating shaft, a main body containing all or part of the electric motor, and an electric motor. It is a ceiling fan that has vanes that are fixed via arm parts, and the vanes rotate together with the motor and blows air. Part or all of the vanes are composed of an upper plate and a lower plate. It is a ceiling fan with an air passage space with openings on the peripheral side and the outer peripheral side, and air on the inner peripheral side can blow out to the outer peripheral side through the air passage space, and the inner peripheral side of the blade Even in the area, the work of blowing air is good, the blowing efficiency is good, the reachable range of blowing can be widened, and the wind speed can be increased near the center of the ceiling fan.

  Further, the inner diameter Dti of the upper plate of the vane plate is a ceiling fan that is larger than the inner diameter Dbi of the lower plate, and the air on the inner peripheral side easily flows into the inner opening during reverse rotation and passes through the air passage space. Thus, the air can be blown to the outer peripheral side, and the wind speed of the circulating air blown from the blade to the outer periphery can be increased.

  Moreover, the inner diameter Dti of the upper plate of the slats is a ceiling fan that is smaller than the inner diameter Dbi of the lower plate, and the air on the inner peripheral side easily flows into the inner opening when rotating in the forward direction, The air can be blown out to the outer peripheral side, and air blowing work can be performed even in the inner peripheral side region of the slats, so that the air blowing efficiency is good and the air reaching range can be widened.

  In addition, the upper plate of the slats is fixed to the electric motor via the arm part, and the joint between the arm part and the slats is a ceiling fan at the boundary between the inner peripheral side region and the outer peripheral side region of the slats. In the inner peripheral side region of the slats, the work of blowing air is good, the blowing efficiency is good, the reachable range of blowing can be widened, and the wind speed can be increased even near the center part of the ceiling fan. Have.

  Moreover, it is a ceiling fan provided with an air quality improving function in the air passage space of the slats, and has an effect that indoor air contaminated by scattering of dust and the like due to operation of the ceiling fan can be improved.

  In addition, the air quality improvement function is a ceiling fan that is dust collection by a filter, and it can be improved by collecting indoor air that is contaminated by scattering of dust etc. by the operation of the ceiling fan with a filter. It has the action.

  In addition, the air quality improvement function is a ceiling fan that is fragrant, and it can aroma the indoor air polluted with odor due to scattering of dust and the like by the operation of the ceiling fan, and can improve unpleasant odor It has the action.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Reference form 1)
Reference Embodiment 1 of the present invention is shown in FIGS. As shown in FIGS. 1 to 3, the ceiling fan 1 includes an attachment means 3 for fixing one end of the rotating shaft 2 to the ceiling surface side, an electric motor 4 that rotates around the rotating shaft 2, and an electric motor that includes the electric motor 4. A rotating body 5 that rotates together with the main body 6 is provided, and three blades 8 are fixed to the rotating section 5 of the main body 6 via the arm section 7. In this example, the outer diameter of the main body 6 is 250 mm, the distance from the ceiling 9 to the lowest end 10 of the main body 6 is 300 mm, the inner diameter of the blade 8 is 300 mm, the outer diameter is 900 mm, and the attachment means 3 is attached to the ceiling 9. The hook member can be fixed to a hook ceiling provided in advance. The joint portion 11 between the arm portion 7 and the blade plate 8 is located at a diameter of 500 mm, and the blade plate 8 is divided into an inner peripheral region 12 and an outer peripheral region 13 with the joint portion 11 as a boundary.

  The outer peripheral side region 13 of the vane plate 8 is fixed at an outer peripheral side attachment angle θo (in this example, the outermost peripheral attachment angle is 20 degrees), which is an attachment angle in the circumferential direction around the rotation shaft 2. The inner peripheral side region 12 of the plate 8 is fixed in the circumferential direction around the rotation axis 2 with an inner peripheral side mounting angle θi (80 degrees in this example) larger than the outer peripheral side mounting angle θo of the outer peripheral side region 13. The inner peripheral side region 12 and the outer peripheral side region 13 are smoothly joined.

  With this configuration, when the vane plate 8 is rotated by the electric motor 4, the pressure increase action of the vane plate 8 causes the outer peripheral side region 13 of the vane plate 8 to pass between the ceiling 9 and the vane plate 8 from the outer periphery when rotating in the forward direction. Air is blown downward, and during reverse rotation, air is blown from the lower side of the vane plate 8 between the ceiling 9 and the vane plate 8 to the outer periphery of the vane plate 8. Produces different outer circulation winds 14. At that time, in the inner peripheral side region 12 of the slat 8, the air on the inner peripheral side from the inner peripheral end 15 flows into the slat 8 when blowing in the forward direction and blows downward, and the air is blown from below at the reverse rotation. Since the air flows into the plate 8 and is blown out toward the inner peripheral side, the inner circulating air 16 can be generated near the main body 6 of the ceiling fan 1 simultaneously with the outer circulating air 14. However, since the work of blowing is performed, the blowing efficiency is good and the reachable range of blowing can be widened.

(Reference form 2)
Reference Embodiment 2 of the present invention is shown in FIG. The same parts as those of the reference form 1 are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 4, an inner peripheral blade 17 is fixed as an inner peripheral region 12 on the inner peripheral side of the arm portion 7 branched at the joint portion 11, and an outer peripheral region 13 is positioned on the outer peripheral side of the joint portion 11. A side blade 18 is fixed.

  With this configuration, since the inner peripheral side region 12 and the outer peripheral side region 13 are not integral, the outer peripheral side region 13 that generates the optimum shape for the flow of the inner peripheral side region 12 that generates the inner circulating wind 16 and the outer circulating wind 14. Since the optimum shape for the flow of air can be determined independently, the air blowing efficiency is good, and the reachable range of the air can be widened.

(Reference form 3)
A third embodiment of the present invention is shown in FIG. The same parts as those in Reference Embodiments 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 5, the blade 8 is positioned above the lowermost end 10 of the main body 6.

  With this configuration, the inner circulating air 16 can be generated in the inner peripheral side region 12 of the slat 8 near the center 6 of the ceiling fan 1 and immediately below the center without increasing the product height of the ceiling fan 1 as a whole. The ventilation efficiency is good, and the reachable range of the ventilation can be widened.

(Reference form 4)
Reference Embodiment 4 of the present invention is shown in FIG. The same parts as those in Reference Embodiments 1 to 3 are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 6, the slat 8 is positioned below the lowermost end 10 of the main body 6, the inner diameter of the slat 8 is 150 mm, and the inner peripheral end 15 of the inner peripheral region 12 is inside the outer periphery of the main body 6. Is located.

  With this configuration, the radial length of the inner peripheral region 12 can be increased, and the work amount of the inner peripheral region 12 can be increased to improve the blowing efficiency.

(Reference form 5)
Reference Embodiment 5 of the present invention is shown in FIG. The same parts as those in Reference Embodiments 1 to 4 are denoted by the same reference numerals, and detailed description thereof is omitted. Fig.7 (a) is a perspective view of the ceiling fan 1 of the reference form 5 of this invention, FIG.7 (b) is the same front view. As shown in FIGS. 7A and 7B, the inner peripheral side of the inner peripheral region 12 is parallel to the rotary shaft 2 and has a circular arc shape that is convex in the reverse rotation direction in a cross-sectional shape perpendicular to the rotary shaft 2. The angle α of the inner peripheral end 15 is 45 degrees in the forward rotation direction, and the inner peripheral region 12 is shaped to generate a centrifugal flow when rotating in the forward direction.

  With this configuration, the inner circumferential region 12 generates a centrifugal flow when rotating in the forward direction, the centrifugal flow is transmitted from the inner circumferential region 12 to the outer circumferential region 13 of the blade 8, and from the outer circumferential region 13. Since the wind speed in the centrifugal direction of the air can be increased, the air can be blown over a wide range.

  Note that the cross-sectional shape perpendicular to the rotation axis 2 is an arc shape that is convex in the forward rotation direction, the angle α of the inner peripheral end 15 is 45 degrees in the reverse rotation direction, and the inner peripheral region 12 is in the centrifugal direction during the reverse rotation. If it is the structure which generate | occur | produces this flow, the circulation wind speed which blows off to the outer peripheral side at the time of reverse rotation can be improved.

  The cross-sectional shape of the inner peripheral region 12 perpendicular to the rotating shaft 2 may be any shape that smoothly guides the airflow, such as a plurality of arc shapes, and the angle α is determined by the inner peripheral end 15 catching the inner peripheral air. In order to be able to do so, it may be between 0 degrees and 90 degrees.

(Reference form 6)
Reference Embodiment 6 of the present invention is shown in FIGS. The same parts as those in Reference Embodiments 1 to 5 are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 8, the joint portion 11 is provided with a slat metal fitting 19 attached to the slat 8 and an arm metal fitting 20 attached to the tip of the arm portion 7 to fix the radial direction of the ceiling fan 1. The shaft 21 is fixed by a bolt 22 and a nut 23.

  With this configuration, it is possible to change the attachment angle θ of the blade 8 with the fixed shaft 21 of the joint 11 as a fulcrum. Therefore, according to the size of the room and the ceiling height, the attachment angle is made shallow and the blowing reach range is reduced. It can be narrowed or widened by increasing the mounting angle.

  As shown in FIG. 9, when the fixed shaft 21 is the circumferential direction of the ceiling fan 1, the elevation angle β of the blade 8 can be changed. Therefore, by increasing the elevation angle β, the reach range is widened and the elevation angle is increased. The reach can be narrowed by making it smaller.

  Note that if the vane metal fitting 19 and the arm metal fitting 20 are provided with the fixed shaft 21 in both the radial direction and the circumferential direction, the reach range can be adjusted by both the attachment angle θ and the elevation angle β.

(Embodiment 1)
Embodiment 1 of the present invention is shown in FIGS. The same parts as those in Reference Embodiments 1 to 6 are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIGS. 10 and 11, the ceiling fan 1 includes an attachment means 3 that fixes one end of the rotating shaft 2 to the ceiling surface side, an electric motor 4 that rotates around the rotating shaft 2, and an electric motor 4 that includes the electric motor 4. A main body 6 having a rotating part 5 that rotates together with the main body 6 is provided, and three blades 8 are fixed to the rotating part 5 via an arm part 7. In this example, the outer diameter of the main body 6 is 250 mm, the distance from the ceiling 9 to the lowest end 10 of the main body 6 is 300 mm, the inner diameter of the blade 8 is 300 mm, the outer diameter is 900 mm, and the attachment means 3 is attached to the ceiling 9. The hook member can be fixed to a hook ceiling provided in advance. The vane plate 8 is composed of an upper plate 24 and a lower plate 25, and an arbitrary circumferential cross-sectional shape around the rotating shaft 2 is an airfoil having a hollow and an outer mounting angle θo (in this example, an outermost mounting angle). The air passage space 26 is formed between the upper plate 24 and the lower plate 25, and the inner peripheral opening 28 and the outer peripheral end are respectively formed at the inner peripheral end 15 and the outer peripheral end 27 of the blade plate 8. An opening 29 is provided.

  With the above configuration, when the vane plate 8 is rotated by the electric motor 4, the air passing between the ceiling 9 and the vane plate 8 from the outer periphery of the ceiling fan 1 is lowered by the pressure increasing action of the lower plate 25 of the vane plate 8 when rotating in the forward direction. The air in the air passage space 26 is pushed out to the outer peripheral side by the action of centrifugal force, so that the air on the inner peripheral side of the ceiling fan 1 flows into the air passage space 26 from the inner peripheral opening 28 and enters the outer periphery. Since a flow that blows out from the opening 29 to the outer peripheral side of the ceiling fan 1 is generated, and the outer circulating wind 14 and the inner circulating wind 16 can be generated at the same time, the air blowing work is also performed on the inner peripheral side of the blade 8. And the reachable range of the air can be widened.

  During reverse rotation, the pressure of the upper plate 24 of the slat 8 causes the air to be blown from the lower part of the slat 8 to the outer periphery of the ceiling fan 1 through the space between the ceiling 9 and the slat 8 and by centrifugal force. 26, the air on the inner peripheral side of the ceiling fan 1 flows into the air passage space 26 from the inner peripheral opening 28, and generates a flow that blows out from the outer peripheral opening 29 to the outer peripheral side of the ceiling fan 1. The circulation wind speed can be improved.

(Embodiment 2)
A second embodiment of the present invention is shown in FIG. The same parts as those in Reference Embodiments 1 to 6 and Embodiment 1 are denoted by the same reference numerals, and detailed description thereof is omitted. Fig.12 (a) is a perspective view of the ceiling fan 1 of Embodiment 2 of this invention, FIG.12 (b) is the top view. As shown in FIG. 12, the inner diameter Dti of the upper plate 24 of the blade 8 is 500 mm, the inner diameter Dbi of the lower plate 25 is 300 mm, and the inner diameter Dti of the upper plate 24 is larger. Is fixed.

  With this configuration, since the inner peripheral opening 28 is formed at the position of the inner diameter Dti of the upper plate above the lower plate 25, the portion of the lower plate 25 up to the inner diameter Dti of the upper plate at the reverse rotation rotates the air into the inner peripheral opening 28. It is possible to improve the speed of the wind that blows out from the outer peripheral opening 29 through the air passage space 26.

(Embodiment 3)
A third embodiment of the present invention is shown in FIG. The same parts as those in Reference Embodiments 1 to 6 and Embodiments 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted. Fig.13 (a) is a perspective view of the ceiling fan 1 of Embodiment 3 of this invention, FIG.13 (b) is the bottom view. As shown in FIG. 13, the inner diameter Dti of the upper plate of the upper plate 24 of the blade 8 is 300 mm, the inner diameter Dbi of the lower plate of the lower plate 25 is 500 mm, and the inner diameter Dti of the upper plate of the upper plate 24 is greater. The arm portion 7 is fixed to the upper plate 24 which is small.

  With this configuration, since the inner peripheral opening 28 is formed at the position of the inner diameter Dbi of the lower plate below the upper plate 24, the portion of the upper plate 24 up to the inner diameter Dbi of the lower plate opens the inner periphery when rotating in the forward direction. Therefore, the speed of the air blown out from the outer peripheral opening 29 through the air passage space 26 can be improved, and the reach range of the air can be widened.

(Embodiment 4)
Embodiment 4 of the present invention is shown in FIG. The same parts as those in Reference Embodiments 1 to 6 and Embodiments 1 to 3 are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 14, the upper plate 24 of the wing plate 8 is fixed to the rotating portion 5 via the arm portion 7, and the joint portion 11 between the arm portion 7 and the upper plate 24 of the wing plate 8 is at a position of 500 mm in diameter. The blade 8 is divided into an inner peripheral region 12 and an outer peripheral region 13 with the joint 11 as a boundary.

  With this configuration, in addition to the expansion of the reach range due to the effect that the air on the inner peripheral side blows out from the outer peripheral opening 29 through the air passage space 26, the inner peripheral end 12 of the blade plate 8 has an inner peripheral end during forward rotation. 15, the air on the inner peripheral side from 15 flows into the blade 8 and blows downward, and during reverse rotation, the air flows into the blade 8 from below and blows toward the inner peripheral, so that the main body 6 of the ceiling fan 1 The inner circulating wind 16 can be generated in the vicinity immediately below, and the air blowing work is performed also in the inner peripheral side region 12 of the vane plate 8. Therefore, the air blowing efficiency is good and the air blowing range can be widened.

(Embodiment 5)
A fifth embodiment of the present invention is shown in FIG. The same parts as those in Reference Embodiments 1 to 6 and Embodiments 1 to 4 are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 15, an air quality improvement function 30 is provided in the air passage space 26 of the blade 8. In this example, the filter 31 for collecting dust provided in the outer peripheral opening 29 is used.

  With this configuration, indoor air that is contaminated by scattering of dust or the like due to the operation of the ceiling fan 1 passes through the air passage space 26 provided with the air quality improvement function 30, thereby improving the air quality.

  As the air quality improvement function 30, in addition to dust collection by the filter 31, heating by an electric heater, deodorization by an activated carbon filter, negative ions by a high pressure generator, and the like may be used.

(Embodiment 6)
Embodiment 12 of the present invention is shown in FIG. The same parts as those in Reference Embodiments 1 to 6 and Embodiments 1 to 5 are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 15, as an air quality improvement function 30, a dust collecting filter 31 is provided in the outer peripheral opening 29 of the air passage space 26 of the blade 8.

  With this configuration, indoor air contaminated by scattering of dust or the like due to the operation of the ceiling fan 1 passes through the filter 31 fixed to the outer peripheral opening 29 through the air passage space 26, but is collected by the filter 31, Air quality can be improved.

(Embodiment 7)
A thirteenth embodiment of the present invention is shown in FIG. The same parts as those in Reference Embodiments 1 to 6 and Embodiments 1 to 6 are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 16, the air quality improving function 30 includes an aroma portion 32 that can store a solid fragrance near the outer peripheral opening 29 of the air passage space 26 of the blade 8.

  With this configuration, indoor air contaminated with odor due to scattering of dust or the like due to the operation of the ceiling fan 1 is fragrant when passing through the fragrance portion 32 that passes through the air passage space 26 and is fixed in the vicinity of the outer peripheral opening 29. Since it blows out from the opening 29, an unpleasant odor in the room can be improved.

  The present invention works on the inner peripheral side region of the slats to improve the air blowing efficiency, has a wide air reaching range, and can increase the wind speed just below the center of the ceiling fan when rotating in the forward direction. The ceiling fan that can increase the speed of the circulating air blown from the blades to the outer periphery during reverse rotation and can improve the indoor air quality is provided.

DESCRIPTION OF SYMBOLS 1 Ceiling fan 2 Rotating shaft 3 Attaching means 4 Electric motor 5 Rotating part 6 Main body 7 Arm part 8 Blade plate 9 Ceiling 10 Bottom end 11 Joining part 12 Inner side area 13 Outer side area θo Outer side side mounting angle θi Inner side side mounting angle 14 Outer circulating air 15 Inner peripheral edge 16 Inner circulating air 17 Inner peripheral vane plate 18 Outer peripheral vane plate α angle 19 Blade plate bracket 20 Arm bracket 21 Fixed shaft 22 Bolt 23 Nut θ Mounting angle β Elevation angle 24 Upper plate 25 Lower Plate 26 Airflow space 27 Outer peripheral edge 28 Inner peripheral opening 29 Outer peripheral opening 30 Air quality improvement function 31 Filter 32 Fragrance

Claims (7)

Mounting means for fixing one end of the rotating shaft to the ceiling surface side, an electric motor rotating around the rotating shaft, a main body containing all or part of the electric motor, and an arm portion on the electric motor or the main body via an arm portion A ceiling fan that includes a plurality of fixed blades, and the blade rotates together with the electric motor to blow air, and the outside circulating air generated by the air blown from the blades toward the outer peripheral side, and the blades The inner circulating air generated by the air flow from the inner circumferential side is generated at the same time, part or all of the blade plate is composed of an upper plate and a lower plate, and the inner circumferential side of the blade plate Ceiling fan with air passage space with openings on the outer periphery. The ceiling fan according to claim 1, wherein the inner diameter Dti of the upper plate of the slats is larger than the inner diameter Dbi of the lower plate. The ceiling fan according to claim 1, wherein the inner diameter Dti of the upper plate of the slats is smaller than the inner diameter Dbi of the lower plate. The upper plate of the slat is fixed to the electric motor via an arm part, and the joint part between the arm part and the slat is at the boundary between the inner peripheral region and the outer peripheral region of the slat. Crab ceiling fan. The ceiling fan in any one of Claims 1-4 provided with the air quality improvement function in the wind path space of a blade. 6. The ceiling fan according to claim 5, wherein the air quality improving function is dust collection by a filter. 6. The ceiling fan according to claim 5, wherein the air quality improving function is fragrance.

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