JP7328850B2 - Air blower and air blowing method - Google Patents

Description

The present invention relates to an air blower and an air blowing method.

The electric fan described in Patent Document 1 has blades, a blade motor, a vertical swing motor, a horizontal swing motor, and a fan guard. The blade motor rotates the blade. The vertical swing motor vertically swings the blades. The left-right swing motor swings the blade left-right. A fan guard houses the vanes.

Patent No. 5877924

In the electric fan described in Patent Document 1, since the wind is not generated from the rotating shaft portion of the blades located in the central region of the electric fan, when the face is brought close to the front of the electric fan, the wind cannot be received at the center of the face. . When I moved away from the fan, the center of my face could also receive the wind, but the wind became weaker.

An object of the present invention is to provide a blower and a blowing method capable of blowing strong air to the center.

According to one aspect of the present application, a blower device includes a blower section, a changing section, and a control section. The blower section has a fan. The changing section changes the attitude of the blower section. The control unit controls the change unit. The fan includes a blade portion having a plurality of blades, and a rotating shaft portion having the plurality of blades fixed to the outer circumference. The control section controls the changing section so as to change the position of the rotating shaft within a predetermined range. The predetermined range indicates a range determined by the maximum trajectory of the rotating shaft portion when the rotating shaft portion moves so as to circumscribe a virtual line corresponding to the outer periphery of the rotating shaft portion in the initial state.

According to one aspect of the present application, a blower device includes a blower section, a changing section, and a control section. The blower section has a fan and a guard covering the fan, and blows air. The changing section changes the attitude of the blower section. The control unit controls the change unit. The fan includes a blade portion having a plurality of blades, and a rotating shaft portion having the plurality of blades fixed to the outer circumference. The guard has a cover member positioned in a direction in which the air is blown with respect to the rotating shaft portion. The control section controls the changing section so as to change the position of the cover member within a predetermined range. The predetermined range indicates a range determined by the maximum trajectory of the cover member when the cover member moves so as to circumscribe a virtual line corresponding to the outer periphery of the cover member in the initial state.

According to one aspect of the present application, the blowing method is a blowing method of blowing air with a blowing unit having a fan. The fan includes a blade portion having a plurality of blades, and a rotating shaft portion having the plurality of blades fixed to the outer circumference. The blowing method includes a step in which the control unit controls the changing unit so as to change the position of the rotating shaft within a predetermined range. The predetermined range indicates a range determined by the maximum trajectory of the rotating shaft portion when the rotating shaft portion moves so as to circumscribe a virtual line corresponding to the outer periphery of the rotating shaft portion in the initial state.

According to the air blower and the air blowing method of the present invention, strong air can be blown to the center.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows an example of the electric fan which concerns on 1st Embodiment of this invention. It is a side view which shows the electric fan which concerns on 1st Embodiment. It is a sectional view showing an electric fan concerning a 1st embodiment. 1 is a block diagram showing the configuration of an electric fan according to a first embodiment; FIG. It is a front view which shows an example of the electric fan which changes the attitude|position of an air blowing part which concerns on 1st Embodiment. It is a top view which shows an example of the electric fan which changes the attitude|position of an air blowing part which concerns on 1st Embodiment. It is a front view which shows another example of the electric fan which changes the attitude|position of an air blowing part which concerns on 1st Embodiment. It is a side view which shows another example of the electric fan which changes the attitude|position of the blower part which concerns on 1st Embodiment. 6 is a flow chart showing an example of processing of the electric fan according to the first embodiment; It is a front view which shows an example of the electric fan which changes the attitude|position of a blower part which concerns on 2nd Embodiment of this invention. It is a top view which shows an example of the electric fan which changes the attitude|position of a blower part which concerns on 2nd Embodiment. It is a side view which shows an example of the electric fan which concerns on 3rd Embodiment of this invention. It is a front view which shows an example of the electric fan which changes the attitude|position of a blower part which concerns on 4th Embodiment of this invention.

An embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

[First embodiment]
A configuration of an electric fan according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a front view showing an example of an electric fan according to a first embodiment; FIG. FIG. 2 is a side view showing the electric fan according to the first embodiment. FIG. 3 is a cross-sectional view showing the electric fan according to the first embodiment. Moreover, in the first embodiment, the X-axis, Y-axis, and Z-axis that are orthogonal to each other are shown in the drawing. The Z axis is parallel to the vertical direction, and the X and Y axes are parallel to the horizontal direction.

As shown in FIGS. 1 to 3, the electric fan 1 includes a base 141, a first support 142, a second support 143, a blower section 20, a motor 31, a control section 30, and an operation panel 141a. . Fan 1 is an example of a blower. The motor 31 is an example of a changing unit. The operation panel 141a is an example of a reception unit.

The base 141 is placed on the floor. The outer shape of the base 141 has, for example, a flat shape that is substantially circular in plan view. An operation panel 141 a is provided on the upper front surface of the base 141 . Operation panel 141a accepts operation information. The operation information indicates information input by the user. The operation panel 141 a outputs operation information to the control section 30 .

In the first embodiment, the side on which the operation panel 141a of the electric fan 1 is arranged is defined as the front side of the electric fan 1 and the opposite side is defined as the rear side of the electric fan 1 . The positive direction of the X-axis indicates the front side of the electric fan 1 . Also, the right side of the fan 1 when viewed from the front side is defined as the right side of the fan 1 , and the opposite side is defined as the left side of the fan 1 . The positive direction of the Y-axis indicates the right side of the electric fan 1 . It should be noted that these directions do not limit the directions in use of the electric fan 1 of the present invention.

A first strut 142 extends upward from the base 141 . Specifically, the first support 142 extends vertically from the rear upper surface of the base 141 .

The second strut 143 has an upper portion 143b and a lower portion 143a. The lower portion 143a rotates with respect to the first column 142 about the second rotation axis AX. The second rotation axis AX extends along the Z-axis. Specifically, the upper portion 142a of the first strut 142 is inserted into the lower portion 143a. The lower portion 143a is rotatably attached to the upper portion 142a of the first support 142 .

The lower part 143a has a motor 143c. The motor 143c is an example of a changing unit. The motor 143c rotates the lower portion 143a on the second rotation axis AX. For example, the motor 143c rotates the lower portion 143a right and left by about 90° (between -90° and 90°). The motor 143c is, for example, a stepping motor. Motor 143 c is driven by control unit 30 .

The blower unit 20 rotates about the first rotation axis BX with respect to the second strut 143 . The first rotation axis BX is orthogonal to the second rotation axis AX. Specifically, the upper portion 143b has a first portion and a second portion. The blower section 20 is positioned between the first section and the second section. The blower part 20 is rotatably assembled to the first part and the second part.

The motor 31 changes the attitude of the air blower 20 . Specifically, the motor 31 rotates the air blower 20 about the first rotation axis BX. For example, the motor 31 rotates the first rotary shaft portion 20a of the blower portion 20 by about 45° (between -45° and 45°) vertically. Motor 31 is, for example, a stepping motor. Motor 31 is driven by control unit 30 .

The blower 20 blows air in a predetermined direction D1. Specifically, the blower section 20 has a drive section cover 21 , a fan motor 12 , a fan 11 and a guard 22 . A predetermined direction D<b>1 indicates a direction from the position of the fan motor 12 toward the position of the fan 11 . The predetermined direction D1 is orthogonal to the first rotation axis BX.

The fan 11 includes, for example, a rotating boss 111 and blades 112 . The rotary boss 111 is an example of a rotary shaft. Rotation boss 111 includes, for example, a cylinder having a first diameter R1. The blade portion 112 has a plurality of blades. Each of the plurality of blades has the same shape as each other. A plurality of blades are fixed to the outer periphery of the rotary boss 111 . Note that the rotary boss 111 and the plurality of blades may be integrated.

The fan motor 12 is covered with a drive section cover 21 that opens in the predetermined direction D1. The fan motor 12 has a second rotating shaft portion 121 protruding in the predetermined direction D1. The second rotating shaft portion 121 rotates on the third rotating axis CX. The third rotation axis CX extends along the predetermined direction D1. The second rotating shaft portion 121 is attached to the center of the rotating boss 111 . As a result, the fan 11 is rotated on the third rotation axis CX by the fan motor 12 .

The guard 22 is, for example, a net-like body that covers the fan 11 . The guard 22 has, for example, a cylindrical peripheral portion 221 , a plurality of first bone portions 222 , a circular cover plate 223 and a plurality of second bone portions 224 . The cover plate 223 is an example of a cover member.

The inner peripheral portion of peripheral edge portion 221 faces the outer peripheral portion of fan 11 . Each of the plurality of first bone portions 222 is linearly provided along the predetermined direction D1. The plurality of first bone portions 222 are arranged at intervals from each other. One end of each of the plurality of first bones 222 is connected to the drive unit cover 21 , and each of the other ends of the plurality of first bones 222 is connected to the peripheral edge portion 221 .

The cover plate 223 is positioned in a direction in which air is blown with respect to the rotary boss 111 . That is, the cover plate 223 is positioned in the predetermined direction D1 with respect to the rotation boss 111. As shown in FIG. Specifically, the cover plate 223 faces the front surface of the fan 11 . The cover plate 223 is, for example, a disk having a third diameter R3 larger than the first diameter R1. Each of the plurality of second bone portions 224 is linearly provided along the predetermined direction D1. The plurality of second bone portions 224 are arranged at intervals from each other. One end of each of the plurality of second bone portions 224 is connected to the peripheral portion 221 , and each of the other ends of the plurality of second bone portions 224 is connected to the outer peripheral edge of the cover plate 223 .

The configuration of the electric fan 1 will be described in detail with reference to FIG. FIG. 4 is a block diagram showing the configuration of the electric fan 1 according to the first embodiment. As shown in FIG. 4 , the electric fan 1 further includes a storage section 40 .

The storage unit 40 includes a RAM (Random Access Memory) and a ROM (Read Only Memory). Storage unit 40 stores a control program for controlling the operation of each unit of electric fan 1 .

The control unit 30 is a hardware circuit including a processor such as a CPU (Central Processing Unit). The control unit 30 controls the motor 31 , the motor 143 c and the fan motor 12 by executing the control program stored in the storage unit 40 .

Specifically, the control unit 30 drives the fan motor 12 based on operation information from the operation panel 141a. As a result, air circulates around the electric fan 1 by the fan 11 . Specifically, the air sucked into the fan 11 is blown out in the predetermined direction D1 of the fan 11 through the guard 22 .

The control unit 30 also drives the motor 143c based on operation information from the operation panel 141a. As a result, the lower portion 143a is rotated with respect to the first column 142 by the motor 143c. Therefore, the predetermined direction D1 is changed by about 90 degrees to the left and right. Therefore, the air sucked into the fan 11 is blown out through the guard 22 while the predetermined direction D1 is changed left and right by about 90 degrees.

Furthermore, the control unit 30 drives the motor 31 based on operation information from the operation panel 141a. As a result, the blower section 20 is rotated with respect to the second column 143 by the motor 31 . Therefore, the predetermined direction D1 is changed up and down by about 45°. Therefore, the air sucked into the fan 11 is blown out through the guard 22 while the predetermined direction D1 is changed up and down by about 45 degrees.

Further, the electric fan 1 according to the first embodiment has a predetermined mode as a control method for the air blowing section 20 . The predetermined mode is a mode in which the fan 1 changes the attitude of the air blower 20 within a predetermined range. For example, in the predetermined mode, when the user wants to use the fan 1 as a dryer, the fan 1 rotates the blower section 20 within a predetermined range.

The control unit 30 controls the motor 31, the motor 143c, and the fan motor 12 based on operation information indicating a predetermined mode from the operation panel 141a.

FIG. 5 is a front view showing an example of the electric fan 1 in which the attitude of the air blower 20 is changed. FIG. 6 is a plan view showing an example of the electric fan 1 in which the posture of the air blower 20 is changed. As shown in FIGS. 5 and 6, the controller 30 controls the motor 31 and the motor 143c to change the position of the rotary boss 111 within a predetermined range LB.

A predetermined range LB indicates a range determined by the maximum trajectory LB of the rotary boss 111 when the rotary boss 111 moves so as to circumscribe the virtual line LA corresponding to the outer periphery of the rotary boss 111 in the initial state. For example, the predetermined range LB preferably represents a cylinder having a second diameter R2 three times the first diameter R1.

Specifically, the initial state indicates a state in which the predetermined direction D1 is orthogonal to the first rotation axis BX and the second rotation axis AX. For example, the predetermined direction D1 extends along the X-axis. The rotary boss 111 is a cylindrical body whose center axis extends along the X-axis. The rotary boss 111 has a front annular body 111a located on the positive direction side of the X axis and a rear annular body 111b located on the negative direction side of the X axis.

On the other hand, the changed state indicates a state in which the position of the rotary boss 111 is changed from the position of the rotary boss 111 in the initial state. Specifically, when viewed from the side opposite to the predetermined direction D1, the outer circumference of the front annular body 111a of the rotary boss 111 in the initial state and the outer circumference of the front annular body 111a of the rotary boss 111 in the changed state are in contact with each other. Indicates status. Specifically, the motor 143c rotates the lower portion 143a leftward at α°. As a result, the outer circumference of the front annular body 111a of the rotary boss 111 circumscribes the left side of the virtual line LA corresponding to the outer circumference of the front annular body 111a of the rotary boss 111 in the initial state. Then, the control unit 30 controls the motor 31 and the motor 143c so as to alternately repeat the changed state and the initial state.

As described above, according to the first embodiment, since the position of the rotary boss 111 is changed within the predetermined range LB, a strong wind can be blown to the center. As a result, when the face is brought close to the front of the electric fan 1, the whole face including the center and contour of the face can receive strong wind.

Further, by rotating the air blower 20 about the first rotation axis BX, the position of the rotation boss 111 of the air blower 20 in the initial state can be made different from the position of the rotation boss 111 in the changed state.

The user can blow strong air to the center by inputting operation information indicating a predetermined mode on the operation panel 141a. As a result, a strong wind can be received when the user desires.

Furthermore, even when the cover plate 223 is provided, the entire face including the center and contour of the face can receive strong wind.

Also, FIG. 7 is a front view showing another example of the electric fan 1 in which the posture of the air blower 20 is changed. FIG. 8 is a plan view showing another example of the electric fan 1 in which the attitude of the air blower 20 is changed. As shown in FIGS. 7 and 8, the controller 30 controls the motor 143c so as to change the position of the rotary boss 111 within a predetermined range LB.

Specifically, when viewed from the side opposite to the predetermined direction D1, the outer circumference of the front annular body 111a of the rotary boss 111 in the initial state and the outer circumference of the front annular body 111a of the rotary boss 111 in the changed state are in contact with each other. Indicates status. Specifically, the motor 143c rotates the air blower 20 upward at α°. As a result, the outer circumference of the front annular body 111a of the rotary boss 111 circumscribes above the imaginary line LA corresponding to the outer circumference of the front annular body 111a of the rotary boss 111 in the initial state.

More specifically, the controller 30 causes the rotary boss 111 to move to the outer circumference of the virtual line LA in a state where the virtual line LA corresponding to the outer circumference of the rotary boss 111 in the initial state and the outer circumference of the rotary boss 111 in the changed state are in contact with each other. to rotate the motor 31 and the motor 143c.

As described above, according to the first embodiment, since the rotary boss 111 rotates around the outer periphery of the virtual line LA, strong wind can always be blown to the center. As a result, when the face is brought close to the front of the electric fan 1, the whole face including the center and contour of the face can always receive a strong wind.

Here, the processing of the electric fan 1 according to the first embodiment will be described with reference to FIG. 9 . FIG. 9 is a flow chart showing an example of processing of the electric fan 1 .

As shown in FIG. 9, first, in step S101, the operation panel 141a receives operation information. The process proceeds to step S102.

Next, in step S102, the controller 30 controls the motor 31 and the motor 143c to change the position of the rotary boss 111 within the predetermined range LB.

[Second embodiment]
Next, an electric fan 1 according to a second embodiment will be described with reference to FIGS. 10 and 11. FIG. FIG. 10 is a front view showing an example of the electric fan 1 in which the attitude of the air blower 20 is changed. FIG. 11 is a plan view showing an example of the electric fan 1 in which the attitude of the air blower 20 is changed. In the electric fan 1 according to the second embodiment, the movement range of the rotary boss 111 is different. Differences from the first embodiment are mainly described below.

As shown in FIGS. 10 and 11, the control unit 30 controls the motor 31 and the motor so that the center of the rotary boss 111 of the blower unit 20 passes through the virtual line LA corresponding to the outer circumference of the rotary boss 111 in the initial state. 143c. Specifically, the motor 143c rotates the lower portion 143a by β° in the left-right direction, and the motor 31 rotates the air blower 20 by β° in the vertical direction. As a result, the center of the front torus 111a of the rotary boss 111 passes through the outer periphery of the front torus 111a of the rotary boss 111 in the initial state.

As described above, according to the second embodiment, since the position of the rotary boss 111 is changed within the predetermined range LB, strong wind can be blown to the center. As a result, when the face is brought close to the front of the electric fan 1, the whole face including the center and contour of the face can receive strong wind.

[Third embodiment]
Next, an electric fan 1 according to a third embodiment will be described with reference to FIG. 12 . The electric fan 1 according to the third embodiment is different in that a detection unit 213 is further provided. Differences from the first embodiment are mainly described below.

Fan 1 further includes detection unit 213 . A detection unit 213 detects whether or not an object exists within a predetermined distance. The predetermined distance is, for example, 30 cm. The target object is, for example, a human face. The detection unit 213 is, for example, a ranging sensor or a camera. The detection unit 213 is provided on the first support 142 . The detection unit 213 outputs detection information to the control unit 30 .

Based on the detection result of the detector 213, the controller 30 controls the motor 31 and the motor 143c. Specifically, when the object exists within the predetermined distance, the control unit 30 controls the motor 31 and the motor 143c so as to change the position of the rotary boss 111 within the predetermined range LB.

As described above, according to the third embodiment, when the face is brought close to the front of the electric fan 1, the entire face including the center and contour of the face can receive strong wind.

[Fourth embodiment]
Next, an electric fan 1 according to a fourth embodiment will be described with reference to FIG. 13 . FIG. 13 is a front view showing an example of the electric fan 1 in which the attitude of the air blower 20 is changed. In the electric fan 1 according to the fourth embodiment, the movement range of the air blower 20 is different. Differences from the first embodiment are mainly described below.

As shown in FIG. 13, the controller 30 controls the motors 31 and 143c to change the position of the cover plate 223 within a predetermined range LD.

The predetermined range LD indicates a range determined by the maximum trajectory LD of the cover plate 223 when the cover plate 223 moves so as to circumscribe the virtual line LC corresponding to the outer periphery of the cover plate 223 in the initial state. For example, the predetermined range LD preferably represents a circle having a fourth diameter R4 three times the third diameter R3.

The changed state indicates a state in which the position of the cover plate 223 is changed from the position of the cover plate 223 in the initial state. Specifically, when viewed from the side opposite to the predetermined direction D1, the outer periphery of the cover plate 223 in the initial state and the outer periphery of the cover plate 223 in the changed state are in contact with each other.

As described above, according to the fourth embodiment, since the position of the cover plate 223 is changed within the predetermined range LD, strong air can be blown to the center. As a result, when the face is brought close to the front of the electric fan 1, the whole face including the center and contour of the face can receive strong wind.

The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above-described embodiments, and can be implemented in various aspects without departing from the gist of the present invention. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be omitted from all components shown in the embodiments. In order to facilitate understanding, the drawings mainly show each component schematically, and the number of each component shown in the figure may differ from the actual number for convenience of drawing preparation. Also, each component shown in the above embodiment is an example and is not particularly limited, and various modifications are possible within a range that does not substantially deviate from the effects of the present invention.

(1) As described with reference to FIGS. 1 to 9, the initial state indicates a state in which the predetermined direction D1 is orthogonal to the first rotation axis BX and the second rotation axis AX, but the present invention is limited to this. not. For example, the initial state may indicate the state when the operation information is received.

(2) As described with reference to FIGS. 1 to 9, when the operation information indicating the predetermined mode is input, the motors 31 and 143c rotate the air blower 20. Not limited. For example, the changing unit may translate the blower unit 20 . Specifically, the changing unit may move the blower unit 20 vertically or horizontally.

(3) As described with reference to FIGS. 1 to 9, when the operation information indicating the predetermined mode is input, the controller 30 continuously changes the posture of the blower 20. However, the present invention It is not limited to this. For example, the controller 30 may intermittently change the attitude of the blower 20 . Also, if the rotational speed of the fan motor 12 can be adjusted, the control unit 30 may increase the rotational speed of the fan motor 12 . For example, if the rotational speed of the fan motor 12 can be adjusted in nine stages, the control unit 30 may adjust the rotational speed of the fan motor 12 to one of the three higher stages.

(4) As described with reference to FIGS. 1 to 9, fan 1 includes base 141, but the present invention is not limited to this. For example, the second support 143 of the fan 1 may be attached to the wall.

INDUSTRIAL APPLICABILITY The present invention can be used in the field of blowers.

1 Electric fan 11 Fan 12 Fan motor 20 Blower unit 30 Control unit 31 Motor 111 Rotation boss 112 Blade unit 143c Motor 213 Detection unit D1 Predetermined direction

Claims (10)

a blower having a fan;
a changing unit that changes the attitude of the blower;
A control unit that controls the changing unit,
The fan is
a blade portion having a plurality of blades;
a rotating boss to which the plurality of blades are fixed on an outer periphery;
a predetermined mode in which the control unit controls the change unit so that the position of the rotary boss is alternately repeated between an initial state and a changed state in which the position of the rotary boss is changed within a predetermined range from the initial state ;
The initial state is a state when information for executing the predetermined mode is received,
The predetermined range is such that when the fan in the initial state is viewed from the rotation axis direction of the fan, the rotary boss circumscribes an imaginary line corresponding to the outer circumference of the rotary boss in the initial state. A blower device that indicates a range determined by the maximum trajectory of the rotating boss when it moves. The blower blows air in a predetermined direction,
The changing unit rotates the blower unit about a first rotation axis,
The blower device according to claim 1, wherein said predetermined direction is orthogonal to said first rotation axis. The changing unit further rotates the blower unit about a second rotation axis,
3. The blower device according to claim 2, wherein said second axis of rotation is perpendicular to said first axis of rotation. The blower unit has a guard covering the fan,
4. The blower device according to claim 2, wherein said guard has a cover member positioned in said predetermined direction with respect to said rotary boss . further comprising a reception unit that receives operation information,
The blower device according to any one of claims 1 to 4 , wherein the control section controls the changing section based on the operation information. Further comprising a detection unit that detects whether or not an object exists within a predetermined distance,
The air blower according to any one of claims 1 to 4, wherein the control section controls the changing section based on the detection result of the detection section. the rotating boss includes a cylinder having a first diameter;
7. A blower device according to any one of the preceding claims, wherein said predetermined range represents a cylinder having a second diameter three times said first diameter. a fan, and a blowing unit that has a guard that covers the fan and blows air;
a changing unit that changes the attitude of the blower;
A control unit that controls the changing unit,
The fan is
a blade portion having a plurality of blades;
a rotating boss to which the plurality of blades are fixed on an outer periphery;
The guard has a cover member positioned in a direction in which the air is blown with respect to the rotary boss ,
the control unit controls the change unit so as to change the position of the cover member within a predetermined range;
a predetermined mode in which the control unit controls the change unit so that the position of the rotary boss is alternately repeated between an initial state and a changed state in which the position of the rotary boss is changed within a predetermined range from the initial state;
The initial state is a state when information for executing the predetermined mode is received,
The predetermined range is such that the cover member circumscribes an imaginary line corresponding to the outer periphery of the cover member in the initial state when the fan in the initial state is viewed from the rotation axis direction of the fan . A blower device showing a range determined by a maximum trajectory of the cover member when moved. the cover member includes a disc having a third diameter;
9. The blower device of claim 8 , wherein said predetermined range represents a circle having a fourth diameter three times said third diameter. a blade portion having a plurality of blades;
A blowing method for blowing air by a blowing unit having a fan, including a rotating boss to which the plurality of blades are fixed on the outer periphery,
a predetermined mode in which the control unit controls the blower unit such that the position of the rotary boss is alternately repeated between an initial state and a changed state in which the initial state is changed within a predetermined range;
The initial state is a state when information for executing the predetermined mode is received,
changing the position of the rotary boss within a predetermined range;
The predetermined range is such that when the fan in the initial state is viewed from the rotation axis direction of the fan, the rotary boss circumscribes an imaginary line corresponding to the outer circumference of the rotary boss in the initial state. A method of blowing air, which indicates a range determined by the maximum trajectory of the rotating boss when it is moved.

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