JP2017137781A - Electric fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce vibration in an electric fan having a head swing function.SOLUTION: An electric fan includes: a base 2; a strut part 3 extending from the base 2; a blowing part 4 rotatably provided at the strut part 3; a rotation part 5 for rotating the blowing part 4; a vibration detection part 6 for detecting the magnitude of vibration of the electric fan 1; and a control part for controlling the rotation part 5. The control part rotates the rotation part 5 at a plurality of rotation speeds, and controls the rotation part 5 at the rotation speed in which the magnitude of the vibration detected by the vibration detection part 6 is the smallest. With this constitution, the blower part 4 is rotated at the rotation speed in which the magnitude of the vibration detected by the vibration detection part 6 is the smallest, so that the electric fan can be acquired in which the vibration generating according to the rotation of the blower part 4 is suppressed to the minimum.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a fan having a swing function.

  Conventionally, this type of electric fan has been known that includes a protective cover formed of an elastic material between a base and a support portion and suppresses vibration (see, for example, Patent Document 1).

  Hereinafter, the electric fan will be described with reference to FIGS. 12 and 13.

  As shown in FIGS. 12 and 13, the electric fan 101 includes a base 102, an electrical component storage unit 103, a support unit 104, and a blower unit 105, and the electrical component storage unit 103 has a protection made of an elastic material on the bottom surface. A cover 106 is provided. Since the protective cover 106 is formed of an elastic material, the vibration of the air blowing unit 105 is reduced from being transmitted to the base 102.

Japanese Patent No. 4201073

  The problem in the conventional example is to increase the reduction in vibration.

  In the electric fan having the swing function, the vibration generated in the blower when swinging is transmitted to the base via the support and the base is vibrated. This vibration is transmitted to the floor of the room and the floor may vibrate.

  So, before the vibration generated in the blower part is transmitted to the base, it is relaxed by the elastic material, but the conditions such as the vertical direction, height, swing speed, floor, etc. of the blower part change And the frequency changes, and depending on the conditions, floor co-seismic motion may occur.

  An object of the present invention is to suppress the occurrence of vibration of the electric fan itself when swinging and to further reduce the vibration.

  And in order to achieve this object, the electric fan according to the present invention comprises a base, a support column extending from the base, a blower provided rotatably on the support, and the blower. A rotation unit that rotates, a vibration detection unit that detects a magnitude of vibration of the electric fan, and a control unit that controls the rotation unit, wherein the control unit includes a plurality of rotation speeds. And the rotation part is controlled to a rotation speed at which the magnitude of the vibration detected by the vibration detection part is the smallest, thereby achieving the intended purpose. is there.

  According to the present invention, a base, a support column extending from the support, a blower provided rotatably on the support, a turning unit for rotating the blower, and a vibration of the electric fan And a control unit that controls the rotation unit, and the control unit rotates the rotation unit at a plurality of rotation speeds and is detected by the vibration detection unit. Since the rotation unit is controlled at the rotation speed with the smallest magnitude of vibration, the blower unit is rotated at the rotation speed with the smallest vibration magnitude detected by the vibration detection unit. As a result, it is possible to obtain an effect that the vibration generated with the rotation of the blower is minimized.

Side view of the electric fan according to Embodiment 1 of the present invention. Perspective view of the fan The figure which shows the ventilation part angle adjustment mechanism of the same fan Figure showing the inside of the fan Figure showing the inside of the fan The perspective view which shows the connection part of the same fan Perspective view showing knee joint of the fan Flow chart showing rotation speed control of the fan Side view of the electric fan according to the second embodiment of the present invention. Flow chart showing rotation speed control of the fan The figure which shows the example of rotation speed control of the electric fan Perspective view of a conventional electric fan The figure which shows the protective cover of the conventional electric fan

  An electric fan according to the present invention includes a base, a support column extending from the base, a blower provided rotatably on the support, a rotating unit that rotates the blower, and a fan A vibration detection unit that detects a magnitude of vibration; and a control unit that controls the rotation unit, wherein the control unit rotates the rotation unit at a plurality of rotation speeds, and the vibration detection unit The rotation unit is controlled to a rotation speed at which the magnitude of the detected vibration is the smallest.

  As a result, the air blowing unit is rotated at the rotation speed at which the magnitude of the vibration detected by the vibration detecting unit is the smallest, so that the vibration generated with the rotation of the air blowing unit can be minimized. Play.

  In addition, the blower unit includes a blower angle adjustment mechanism that can manually adjust the horizontal and vertical directions of the blower unit, and a height adjustment mechanism that can adjust the length of the support column, and the control unit includes the blower unit. When the direction of the air blower is changed by the angle adjustment mechanism, when the height of the air blower is changed by the height adjustment mechanism, and when the electric fan is moved, the rotation unit is rotated at a plurality of rotation speeds. The rotating unit may be controlled at a rotating speed at which the magnitude of vibration detected by the vibration detecting unit is the smallest.

  As a result, although the generated vibration differs depending on the change in the position of the fan and the place where the fan is installed, control is performed so that the blower is rotated at a rotation speed that reduces the vibration again in response to the change. Therefore, there is an effect that the vibration generated with the rotation of the air blowing unit is minimized.

  In addition, the vibration detection unit detects vibration when the direction of the air blowing unit is changed by the air blowing unit angle adjusting mechanism, when the height of the air blowing unit is changed by the height adjusting mechanism, and when the electric fan moves. You may make it the structure of the electric fan characterized by doing.

  As a result, the vibration detection unit detects changes in the position of the fan or the location where the fan is installed, so it is necessary to provide a new sensor to detect changes in the position of the fan or the location where the fan is installed. There is an effect that there is no.

  Further, the vibration detection unit may be configured as an electric fan provided on the base.

  Thereby, since the vibration of the base is detected and the blower is rotated at the rotation speed with the smallest vibration, the vibration transmitted to the floor can be minimized.

  Further, the vibration detection unit may be configured as a fan characterized by being provided in the support column.

  As a result, since the column portion having a hollow structure easily amplifies vibration, the blower portion is rotated at a rotation speed at which the magnitude of vibration in the column portion is the smallest, so that the generated vibration is amplified. The effect is to minimize.

  In addition, the control unit has a first rotation speed, a second rotation speed that is slower than the first rotation speed, and a speed that is faster than the first rotation speed. The first rotation speed, the second rotation speed, and the third rotation speed are compared, and the smallest rotation is performed. You may make it the structure of the electric fan characterized by controlling by speed.

  As a result, the magnitude of vibration is detected at three types of rotation speeds, so that the vibration generated with the rotation of the blower is minimized.

  The control unit rotates the rotation unit at a first rotation speed and a second rotation speed that is slower than the first rotation speed, and the first rotation speed and the first rotation speed. The magnitudes of vibrations at two rotation speeds are compared. If the first rotation speed is smaller, the first rotation speed is replaced with a new second rotation speed. The rotation speed faster than the rotation speed is replaced with a new first rotation speed, the rotation is performed at the new first rotation speed and the new second rotation speed, and the new first rotation speed is The control of comparing the magnitude of vibration at the first rotational speed and the new second rotational speed is repeated, the rotational speed at a small vibration is compared with the vibration at the new rotational speed, and twice. Compare the two rotation speeds in succession, the rotation speed becomes a lower rotation speed, or the predetermined maximum rotation speed or the maximum When reaching the turning speed it may be configured as fan, characterized by controlling at its rotational speed.

  The control unit rotates the rotation unit at a first rotation speed and a second rotation speed that is slower than the first rotation speed. The magnitude of vibration at the second rotation speed is compared. If the vibration is smaller at the first rotation speed, the first rotation speed is replaced with a new second rotation speed. If the rotation speed faster than the rotation speed is replaced with a new first rotation speed and the second rotation speed is less vibrated, the second rotation speed is replaced with the new first rotation speed. Replacing the rotation speed slower than the second rotation speed as a new second rotation speed, rotating at a new first rotation speed and a new second rotation speed, The control for comparing the magnitude of vibration at the new first rotation speed and the new second rotation speed is repeated, and the rotation speed with a small vibration and the new rotation are repeated. Compare the vibrations at degrees, and compare the two rotation speeds twice in succession to a lower rotation speed, or reach a predetermined maximum rotation speed or minimum rotation speed. In such a case, the electric fan may be controlled at the rotational speed.

  Thereby, since the lower limit value of the change in the magnitude of the vibration due to the rotation speed is captured, there is an effect that the vibration generated along with the rotation of the air blower can be minimized.

  In addition, the control unit detects the magnitude of vibration for one reciprocation at each of a plurality of rotation speeds, and then compares the magnitude of the largest vibration in one reciprocation at each rotation speed, You may make it the structure of the electric fan characterized by controlling the said rotation part to the rotation speed where the largest vibration is the smallest in 1 reciprocation in each rotation speed.

  As a result, the vibration at the timing when the vibration becomes the largest among the magnitudes of the vibrations that change in accordance with the rotation is rotated at the lowest rotation speed. Thus, an effect of minimizing the magnitude of vibration generated in a specific posture is achieved.

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

(Embodiment 1)
FIG. 1 is a side view of the electric fan according to the first embodiment of the present invention, as viewed from the right side. FIG. 2 is a perspective view of the electric fan according to the first embodiment of the present invention, and is a view of the electric fan viewed from below, where the bottom surface of the base can be seen.

  As shown in FIGS. 1 and 2, the electric fan 1 includes a base 2, a support column 3, and a blower 4.

  A plurality of stand rubbers 8 are attached to the bottom surface of the base 2, and the electric fan 1 is in contact with the floor via the stand rubbers 8. The base 2 includes a control unit (not shown) inside.

  The column portion 3 has a cylindrical shape extending upward from the upper surface of the base 2. A neck piece lower 16 is provided at the upper end of the column 3. The upper part of the neckpiece lower 16 is provided with a rotating part 5 and an air blowing part 4 to be described later. The support column 3 is provided with a height adjustment mechanism (not shown) for moving the neckpiece lower 16, the rotation unit 5, and the air blowing unit 4 in the upward direction. By operating with the height adjustment button 15, the height of the blower unit 4 can be adjusted.

  FIG. 3 is a diagram illustrating the inside of the neckpiece lower of the electric fan according to the first embodiment of the present invention.

  As shown in FIG. 3, an elevation angle adjustment plate 17 is provided on the lower side surface of the neckpiece lower 16. The elevation angle adjustment plate 17 has a wavy groove, and a sphere (not shown) is sandwiched between the neckpiece lower 16 and the elevation angle adjustment plate 17. When the neckpiece lower is moved so as to manually change the elevation angle of the neckpiece lower 16, the ball repeatedly moves and stops along the groove of the elevation angle adjustment plate. As described above, the elevation angle adjustment unit 18 includes the neckpiece lower 16, the elevation angle adjustment plate 17, and a sphere, and allows the rotation unit 5 and the air blowing unit 4 to rotate in the vertical direction. The direction can be adjusted.

  FIG. 4 is a diagram illustrating the inside of the electric fan according to the first embodiment of the present invention, and is a diagram illustrating a rotating portion when the electric fan is viewed from the right side. FIG. 5 is a view showing the inside of the electric fan according to the first embodiment of the present invention, and is a view showing a rotating part when the electric fan is viewed from the back side.

  As shown in FIGS. 3, 4, and 5, the air blowing unit 4 is provided on the neckpiece lower 16 by the rotating unit 5 so as to be rotatable in the left-right direction.

  The rotating portion 5 includes a mounting plate 10, a swing motor 9, a connecting portion 11, a rod 12, and a neckpiece upper 13.

  The mounting plate 10 extends in the front-rear direction in the electric fan 1, the blower section 4 is provided at the front upper portion, and the columnar rotation shaft 14 that extends downward is provided at the lower front portion. The pivot shaft 14 enters the first shaft hole 13a of the neckpiece upper 13, and the mounting plate 10 is pivotable in the left-right direction.

  As shown in FIG. 7, the neckpiece upper 13 has a substantially elliptical shape, includes a first shaft hole 13 a and a second shaft hole 13 b, and is rotatably fixed inside the neckpiece lower 16. ing. The first shaft hole 13a and the second shaft hole 13b are holes opened in the vertical direction.

  A part of the sliding surface of the neckpiece upper 13 and the neckpiece lower 16 has a left / right angle adjusting portion 19. The left / right angle adjustment unit 19 includes a substantially U-shaped projection having elasticity of the neckpiece upper 13 and a bellows-like surface of the neckpiece lower 16 on which the projection slides. When the neckpiece upper 13 is moved so as to manually change the left and right angle of the air blowing part 4, the movement of the protrusion of the neckpiece upper 13 and the stop when the protrusion of the neckpiece upper 13 slides on the bellows part of the neckpiece lower 16 is performed manually. The left and right angle adjustment at can be made in stages. The elevation angle adjustment unit 18 and the left / right angle adjustment unit 19 are combined to form a blower unit angle adjustment mechanism.

  A swing motor 9 is attached to the rear side of the mounting plate 10. The swing motor 9 includes a motor rotating shaft (not shown) extending downward, and a connecting portion 11 is attached to the motor rotating shaft. The swing motor 9 is a motor having a plurality of rotational speeds, for example, a stepping motor.

  FIG. 6 is a perspective view showing a connection portion of the electric fan according to Embodiment 1 of the present invention, as seen from below.

  As shown in FIG. 6, the connecting portion 11 has a thin cylindrical shape, and has a first shaft hole 11 a at the center portion and a second shaft hole 11 b at the peripheral portion. The motor rotation shaft of the swing motor 9 is fitted in the first shaft hole 11a. When the motor rotation shaft of the swing motor 9 rotates, the connecting portion 11 rotates around the first shaft hole 11a. Similarly, the second shaft hole 11b also rotates around the first shaft hole 11a as a rotation center.

  3, 5, and 6, the rod 12 has a shape obtained by bending an elongated metal plate, and has a first shaft hole (not shown) on one side and a second shaft hole on the other side. (Not shown).

  One side of the rod 12 is rotatable by a connecting portion fixed to the second shaft hole 13b of the neckpiece upper 13 through the first shaft hole. The other side of the rod 12 is rotatable by a connecting portion fixed to the second shaft hole 11b of the connecting portion 11 through the second shaft hole.

  When the motor rotation shaft of the swing motor 9 rotates, the connecting portion 11 attached to the motor rotation shaft of the swing motor 9 rotates. When the connecting portion 11 rotates, the rod 12 attached to the connecting portion 11 reciprocates around the second shaft hole 13b of the neckpiece upper 13 as a turning center. Due to these movements, the air blower 4 reciprocates in the left-right direction about the rotation shaft 14 as a rotation center.

  The feature of this embodiment is that a vibration detection unit 6 attached to the base for detecting the magnitude of vibration of the base 2 and a control unit for controlling the vibration detection unit 6 and the rotation unit 5 are provided. It is a point that has. The vibration detection unit 6 is attached in the vicinity of any one of the stand rubbers 8 that are in contact with the floor on the bottom surface of the base 2. The vibration detection unit 6 includes, for example, an acceleration sensor, a piezo vibration sensor, or the like.

  Thereby, the vibration detector 6 measures the vibration when the air is blown while the air blower 4 is reciprocally rotated in the left-right direction. The rotation speed of the rotation unit 5 is controlled by the control unit in accordance with the detection result, and the vibration generated from the rotation unit 5 is reduced.

  FIG. 8 is a flowchart showing the control of the rotation speed of the electric fan according to the first embodiment of the present invention. Specific rotation speed control will be described with reference to FIG.

  As shown in FIG. 8, when the swing operation is started, the control unit rotates the blower unit 4 at the first rotation speed by the rotation unit 5 (S1), and at the first rotation speed. The maximum vibration of the base 2 during swinging is measured by the vibration detection unit 6, and the value is recorded in a memory (not shown) (S2). Next, when the maximum vibration during swinging is recorded and the reciprocation is rotated by one reciprocation at the first revolving speed (S3), the control unit is slower than the first revolving speed. It is rotated at the second rotation speed (S4), the maximum vibration during swinging at the second rotation speed is measured by the vibration detector 6, and the value is recorded in the memory (S5). Then, when the maximum vibration during swinging is recorded and the reciprocation is rotated by one reciprocation at the second rotation speed (S6), the control unit causes the blower unit 4 to move to the third speed higher than the first rotation speed. It rotates at the rotation speed (S7), the maximum vibration during swinging at the third rotation speed is measured by the vibration detector 6, and the value is recorded in the memory (S8). Finally, when the maximum vibration during the swing is recorded and the reciprocation is rotated by one reciprocation at the third rotation speed (S9), the control unit performs the first rotation speed and the second rotation recorded in the memory. The maximum vibration of one reciprocal rotation at the third rotation speed and the third rotation speed are compared, and the rotation unit 5 is controlled by the control unit to rotate at the rotation speed with the smallest maximum vibration. (S10). This control is performed until the swing operation is stopped.

  In addition, vibration detection is performed when the direction of the air blower 4 of the fan 1 is changed by the air blower angle adjustment mechanism, when the height of the fan 1 is changed by the height adjustment mechanism, and when the fan 1 is moved. When detected by the unit 6, the control unit performs control so as to search for the rotation speed at which the vibration is minimized (S11). In addition, when the direction of the air blower 4 of the fan 1 is changed by the air blower angle adjusting mechanism, when the height of the fan 1 is changed by the height adjusting mechanism, and when the fan 1 is moved, the swing operation is performed. Since vibration larger than that occurs, it can be detected by the vibration detector 6. That is, when the vibration detection unit 6 detects a vibration larger than a predetermined vibration, the control unit changes the direction of the blower 4 of the fan 1 by the blower angle adjustment mechanism, or the height of the fan 1 by the height adjustment mechanism. It is determined that the electric fan 1 has changed or moved.

  According to such a configuration, the vibration detection unit 6 provided in the base 2 detects the vibration generated during the rotation, and the control unit controls the vibration to a low rotation speed. The blower is rotated at the rotation speed with the smallest vibration. For this reason, it is possible to minimize the vibration generated with the rotation of the air blowing unit 4 from being transmitted to the floor.

  In addition, when comparing the magnitude of vibration at each rotation speed by the rotation unit 5, the control unit compares the largest vibration in one reciprocal rotation. In order to determine whether or not the rotation has been performed for one reciprocation, the rotation time for one reciprocation is calculated from the rotation speed and the rotation angle, and the rotation is performed by that time, or the air is blown by using the position detection means. There is a method of determining one round trip from the position of the part. Here, the position detecting means is, for example, a Hall element.

  According to such a configuration, even if the posture is the same when swinging, the vibration may vary depending on the rotation direction, but the maximum vibration can be detected by detecting the vibration for one reciprocation. For this reason, it is possible to minimize the vibration generated with the rotation of the air blowing unit 4 from being transmitted to the floor.

  In the embodiment, the position of the vibration detection unit 6 is in the vicinity of any one of the stand rubbers. However, the position of the base 2 having the largest vibration, for example, the screw that fixes the bottom surface and the top surface of the base 2 is the most. It is good also as a distant position. In this embodiment, there are three types of rotation speeds, but other speeds are possible. In addition, as the turn order, the first, second, and third turn speeds are operated in this order, but the second, first, and third order, and the turn speeds are set in order from the lowest turn speed. Alternatively, the third, first, and second orders may be used in order of increasing speed. By operating in the order of the rotation speed, there is an effect of making it difficult for the user to notice the speed change.

(Embodiment 2)
FIG. 9 is a side view of the electric fan according to the second embodiment of the present invention, as viewed from the right side. 9, the same components as those in FIGS. 1 and 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 9, the electric fan according to the second embodiment of the present invention is different from the electric fan according to the first embodiment in the attachment position of the vibration detection unit 6. Specifically, the electric fan 1 includes a vibration detection unit 6 on the upper part of the support column 3.

  The column part 3 has a hollow structure, and the upper part is farthest from the lower part fixed to the base 2, and vibration is easily amplified. The vibration detection unit 6 is provided on the upper portion of the support column 3 where the vibration is easily amplified, thereby detecting the magnitude of the generated vibration.

  In the first embodiment, the rotation unit 5 rotates at three rotation speeds and is controlled to the rotation speed with the smallest vibration among the rotation speeds. Also good.

  The control unit rotates at the first rotation speed and the second rotation speed after rotating at the first rotation speed and the second rotation speed that is slower than the first rotation speed. Compare the magnitude of vibration.

  When the first rotation speed is less vibrated than the second rotation speed, the first rotation speed is replaced with a new second rotation speed, and the first rotation speed is faster than the first rotation speed. The moving speed is replaced with a new first rotation speed, the new first rotation speed and the new second rotation speed are rotated, and the new first rotation speed and the new second rotation speed are changed. Repeat the control to compare the magnitude of the vibration at the rotation speed, compare the rotation speed with a small vibration with the vibration at the new rotation speed, and compare the two rotation speeds twice in succession When the rotation speed reaches the rotation speed, or when a predetermined maximum rotation speed or minimum rotation speed is reached, the rotation speed is controlled.

  On the other hand, when the vibration is smaller in the second rotation speed than in the first rotation speed, the second rotation speed is replaced with a new first rotation speed, which is higher than the second rotation speed. The slow rotation speed is replaced with a new second rotation speed, the rotation is performed with the new first rotation speed and the new second rotation speed, the new first rotation speed and the new second rotation speed. Repeat the control to compare the magnitude of the vibration at the rotation speed of 2, compare the rotation speed with a small vibration with the vibration at the new rotation speed, and compare the two rotation speeds twice in a row. If the rotation speed reaches a small rotation speed or reaches a predetermined maximum rotation speed or minimum rotation speed, control is performed at the rotation speed.

  FIG. 10 is a flowchart showing the rotational speed control of the electric fan according to the second embodiment of the present invention. Hereinafter, the operation control method of the rotation part 5 in Embodiment 2 of this invention is demonstrated.

  As shown in FIG. 10, when the swing operation is started, first, the control unit rotates the blower unit 4 at the first rotation speed by the rotation unit 5 (S′1), and the first rotation is performed. The maximum vibration during swinging at the moving speed is measured by the vibration detector 6, and the value is recorded in a memory (not shown) (S'2). Next, when the maximum vibration during the swinging is recorded and the reciprocation is rotated by one reciprocation at the first revolving speed (S′3), the control unit speeds the blower 4 from the first revolving speed. Is rotated at a slow second rotation speed (S'4), and the maximum vibration during swinging is measured by the vibration detection unit 6 at the second rotation speed, and the value is recorded in the memory. (S'5).

  When the maximum vibration during the swinging is recorded and the reciprocating rotation is performed at the second revolving speed (S′6), the control unit at the first revolving speed and the second revolving speed. The maximum vibration for one reciprocation is compared (S'7), and the maximum vibration for one reciprocation at the first rotation speed is the maximum rotation for one reciprocation at the second rotation speed. When it is determined that the vibration is smaller than the vibration, it is determined whether or not the result of one loop before the maximum vibration at the first rotation speed is larger than the maximum vibration at the second rotation speed (S′8a). ). Here, one loop refers to the flow from S′1 to S′10a or S′10b. Immediately after the start of swinging or immediately after searching for the rotational speed again in a state described in S′12 described later, the determination is “no” because there is no previous loop. When there is one loop before, the first rotation speed before one loop and the second rotation speed of the current loop are the same. Therefore, the case where the determination is “yes” in S′8a indicates that the maximum vibration due to the same rotation speed is reduced twice in succession.

When the determination is no in S′8a, it is determined whether the rotation speed at which the vibration is reduced has reached a predetermined upper limit value or lower limit value of the rotation speed (S′9a). When the rotation speed at which the vibration is reduced does not reach the upper limit value or the lower limit value of the predetermined rotation speed, the second rotation speed is replaced with the first rotation speed, and the first rotation speed is set. The process returns to S′1 with the faster rotation speed as the new first rotation speed. (S'10a)
If the determination is yes in S′8a, or if the determination is no in S′9a, the rotation is performed at the rotation speed at which the maximum vibration at that time is reduced (S′11). If vibration is detected such as when the direction of the air blowing section of the fan is changed, when the height is changed, or when the fan is moved, the process returns to S′1 again (S′12).

  If it is determined in S′7 that the maximum vibration for one reciprocation at the first rotation speed is greater than the maximum vibration for one reciprocation at the second rotation speed, one loop It is determined whether the previous result indicates that the maximum vibration at the first rotation speed is smaller than the maximum vibration at the second rotation speed (S′8b).

  When the determination is no in S′8b, it is determined whether the rotation speed at which the vibration is reduced has reached a predetermined upper limit value or lower limit value of the rotation speed (S′9b). If the rotation speed at which the vibration is reduced does not reach the predetermined upper limit value or lower limit value, the first rotation speed is replaced with the second rotation speed, and the second rotation speed is set. The process returns to S′1 with the slower rotation speed as a new second rotation speed (S′10b).

  If the determination is yes in S′8b, or if the determination is no in S′9b, the rotation is performed at the rotation speed at which the maximum vibration at that time is reduced (S′11). If vibration is detected such as when the direction of the air blowing section of the fan is changed, when the height is changed, or when the fan is moved, the process returns to S′1 again (S′12).

  Thereby, since the lower limit value of the change in the magnitude of the vibration due to the rotation speed is captured, there is an effect that the vibration generated along with the rotation of the air blower can be minimized.

  Hereinafter, as shown in FIG. 11, the flow from S′1 to S′11 will be described using a specific example.

First, Example 1 will be described. In Example 1, rotation was performed at 3.4 r / min as the first rotation speed and 3.2 r / min as the second rotation speed, and the respective maximum vibrations were recorded (from S′1 to S ′). 6). As a result, the maximum vibration when rotating at the first rotation speed of 3.4 r / min is smaller than the maximum vibration when rotating at the second rotation speed of 3.2 r / min. became. (S'7)
Since this rotation speed is the first loop after the electric fan starts swinging, there is no previous loop (S′8a).

  Further, the rotation speed 3.4 r / min at which the maximum vibration is reduced does not reach the upper limit (4.4 r / min) or the lower limit (2.2 r / min) of the rotation speed (S ′). 9a). Therefore, 3.4 r / min that was the first rotation speed is set as the new second rotation speed, and 3.6 r that is faster than 3.4 r / min as the new first rotation speed. / Min was set (S′10a), rotation was performed at 3.4 r / min, 3.6 r / min, and the maximum vibration was recorded (S′1 to S′6).

  As a result, the maximum vibration when rotating at the first rotation speed of 3.6 r / min is greater than the maximum vibration when rotating at the second rotation speed of 3.4 r / min. (S'7). As a result of one loop before, the maximum vibration at the first rotation speed was smaller than the maximum vibration at the second rotation speed (S′8a).

  Further, the rotation speed 3.6 r / min at which the maximum vibration is reduced does not reach the upper limit (4.4 r / min) or the lower limit (2.2 r / min) of the rotation speed (S ′). 9a). Therefore, 3.6 r / min which was the first rotation speed is set as the new second rotation speed, and 3.8 r which is faster than 3.6 r / min as the new first rotation speed. / Min was set (S′10a), rotation was performed at 3.6 r / min and 3.8 r / min, and the maximum vibration was recorded (S′1 to S′6).

As a result, the maximum vibration when rotating at the first rotation speed of 3.8 r / min is greater than the maximum vibration when rotating at the second rotation speed of 3.6 r / min. (S'7).
As a result of one loop before, the maximum vibration at the first rotation speed was smaller than the maximum vibration at the second rotation speed (S′8a).
Further, the rotation speed 3.8 r / min at which the maximum vibration is reduced does not reach the upper limit (4.4 r / min) or lower limit (2.2 r / min) of the rotation speed (S ′). 9a).
Therefore, 3.8 r / min, which was the first rotation speed, is set as the new second rotation speed, and 4.0 r, which is faster than 3.8 r / min, as the new first rotation speed. / Min is set (S'10a),
Rotation was performed at 3.8 r / min and 4.0 r / min, and the maximum vibration was recorded (S′1 to S′6).
As a result, the maximum vibration when rotating at the second rotation speed of 3.8 r / min is greater than the maximum vibration when rotating at the first rotation speed of 4.0 r / min. (S'7). As a result of one loop before, the maximum vibration at the first rotation speed was smaller than the maximum vibration at the second rotation speed (S′8b). Since the maximum vibration at the rotation speed of 3.8 r / min was smaller twice in succession, the rotation was performed at the rotation speed of 3.8 r / min. (S'11).

  Next, Example 2 will be described. In Example 2, rotation was performed at 3.4 r / min as the first rotation speed and 3.2 r / min as the second rotation speed, and the respective maximum vibrations were recorded (from S′1 to S ′). 6). As a result, the maximum vibration when rotating at the first rotation speed of 3.4 r / min is greater than the maximum vibration when rotating at the second rotation speed (S′7). . Since this rotation speed is the first loop after the electric fan starts swinging, there is no previous loop (S′8b).

  Further, the rotation speed 3.2 r / min at which the maximum vibration is reduced does not reach the upper limit (4.4 r / min) or the lower limit (2.2 r / min) of the rotation speed (S ′). 9b). Therefore, 3.2 r / min which was the second rotation speed is set as the new first rotation speed, and 3.0 r which is slower than 3.2 r / min as the new second rotation speed. / Min was set (S′10b), rotation was performed at 3.2 r / min and 3.0 r / min, and the maximum vibration was recorded (S′1 to S′6).

  As a result, the maximum vibration when rotating at the first rotation speed of 3.2 r / min is greater than the maximum vibration when rotating at the second rotation speed of 3.0 r / min. (S'7). As a result of one loop before, the maximum vibration at the first rotation speed was larger than the maximum vibration at the second rotation speed (S′8b). Further, the rotation speed 3.0 r / min at which the maximum vibration is reduced does not reach the upper limit (4.4 r / min) or the lower limit (2.2 r / min) of the rotation speed (S ′). 9b).

Therefore, 3.0 r / min that was the second rotation speed is set as the new first rotation speed, and 2.8 r that is slower than 3.0 r / min as the new second rotation speed. / Min was set (S′10b), rotation was performed at 3.0 r / min and 2.8 r / min, and the maximum vibration was recorded (S′1 to S′6). As a result, the maximum vibration when rotating at the first rotation speed of 3.0 r / min is greater than the maximum vibration when rotating at the second rotation speed of 2.8 r / min. Also became larger. (S'7)
As a result of one loop before, the maximum vibration at the first rotation speed was larger than the maximum vibration at the second rotation speed (S′8b).

  Further, the rotation speed 2.8 r / min at which the maximum vibration is reduced does not reach the upper limit value (4.4 r / min) or the lower limit value (2.2 r / min) of the rotation speed (S ′). 9b). Therefore, 2.8 r / min that was the second rotation speed is set as the new first rotation speed, and 2.6 r that is slower than 2.8 r / min as the new second rotation speed. / Min was set (S′10b), and rotation was performed at 2.8 r / min and 2.6 r / min, and the maximum vibration was recorded (S′1 to S′6).

  As a result, the maximum vibration when rotating at the first rotation speed of 2.8 r / min is greater than the maximum vibration when rotating at the second rotation speed of 2.6 r / min. (S'7). As a result of one loop before, the maximum vibration at the first rotation speed was larger than the maximum vibration at the second rotation speed (S′8b). Further, the rotation speed 2.6 r / min at which the maximum vibration is reduced does not reach the upper limit (4.4 r / min) or the lower limit (2.2 r / min) of the rotation speed (S ′). 9b).

  Therefore, 2.6 r / min that was the second rotation speed is set as the new first rotation speed, and 2.4 r that is slower than 2.6 r / min as the new second rotation speed. / Min was set (S′10b), rotation was performed at 2.6 r / min, 2.4 r / min, and the maximum vibration was recorded (S′1 to S′6).

  As a result, the maximum vibration when rotating at the first rotation speed of 2.6 r / min is greater than the maximum vibration when rotating at the second rotation speed of 2.4 r / min. (S'7). As a result of one loop before, the maximum vibration at the first rotation speed was larger than the maximum vibration at the second rotation speed (S′8b). Further, the rotation speed 2.4 r / min at which the maximum vibration is reduced does not reach the upper limit value (4.4 r / min) or the lower limit value (2.2 r / min) of the rotation speed (S ′). 9b).

  Therefore, 2.4 r / min, which is the second rotation speed, is set as the new first rotation speed, and 2.2 r which is slower than 2.4 r / min as the new second rotation speed. / Min was set (S′10b), and rotation was performed at 2.4 r / min and 2.2 r / min, and the maximum vibration was recorded (S′1 to S′6).

As a result, the maximum vibration when rotating at the first rotation speed of 2.4 r / min is greater than the maximum vibration when rotating at the second rotation speed of 2.2 r / min. Also became larger. (S'7)
As a result of one loop before, the maximum vibration at the first rotation speed was larger than the maximum vibration at the second rotation speed (S′8b). The rotation speed 2.2 r / min at which the maximum vibration is reduced reaches the lower limit value (2.2 r / min) of the rotation speed (S′9b). Therefore, since the rotation speed at which the maximum vibration is reduced has reached the lower limit value, the rotation is performed at the rotation speed of 2.2 r / min (S′11).

  Since the electric fan according to the present invention can reduce vibration during swinging, the electric fan is useful as an electric fan with improved silence.

DESCRIPTION OF SYMBOLS 1 Fan 2 Base 3 Support | pillar part 4 Blowing part 5 Rotating part 6 Vibration detection part 8 Stand rubber 9 Swing motor 10 Mounting plate 11 Connection part 11a 1st shaft hole 11b 2nd shaft hole 12 Rod 13 Knee joint 13a First shaft hole 13b Second shaft hole 14 Rotating shaft 15 Height adjustment button 16 Neckpiece lower 17 Lifting angle adjustment plate 18 Lifting angle adjustment unit 19 Left and right angle adjustment unit

Claims (8)

The base,
A strut extending from the base;
A blower provided rotatably on the support post;
A rotating part for rotating the air blowing part;
A vibration detector that detects the magnitude of the vibration of the electric fan;
A control unit for controlling the rotating unit,
The controller is
Rotating the rotating part at a plurality of rotating speeds;
The electric fan characterized by controlling the said rotation part to the rotation speed where the magnitude | size of the vibration detected by the said vibration detection part is the smallest. Blower angle adjustment mechanism that can manually adjust the horizontal direction and vertical direction of the blower,
Having a height adjustment mechanism capable of adjusting the length of the column part;
The controller is
When the direction of the air blower is changed by the air blower angle adjustment mechanism,
When the height of the air blowing part is changed by the height adjustment mechanism,
And when the fan moves,
Rotating the rotating part at a plurality of rotating speeds;
The electric fan according to claim 1, wherein the rotation unit is controlled to a rotation speed at which the magnitude of vibration detected by the vibration detection unit is the smallest. The vibration detection unit is
When the direction of the air blower is changed by the air blower angle adjustment mechanism,
When the height of the air blowing part is changed by the height adjustment mechanism,
The electric fan according to claim 2, wherein vibration when the electric fan moves is detected. The vibration detection unit is
The electric fan according to any one of claims 1 to 3, wherein the electric fan is provided on the base. The vibration detection unit is
The electric fan according to any one of claims 1 to 3, wherein the electric fan is provided in the support column. The controller is
A first rotation speed of the rotation unit;
A second rotation speed that is slower than the first rotation speed;
Rotating at a third rotation speed higher than the first rotation speed;
Comparing the magnitude of vibration at the first rotation speed, the second rotation speed, and the third rotation speed;
The electric fan according to any one of claims 1 to 5, wherein the electric fan is controlled at the lowest rotation speed. The controller is
The rotating portion is rotated at a first rotation speed and a second rotation speed that is slower than the first rotation speed, and the first rotation speed and the second rotation speed. Compare the magnitude of vibration at
When the first rotation speed is smaller in vibration, the first rotation speed is replaced with a new second rotation speed, and a rotation speed faster than the first rotation speed is replaced with a new first rotation speed. 1 as the rotation speed,
When the vibration is smaller in the second rotation speed, the second rotation speed is replaced with a new first rotation speed, and a rotation speed slower than the second rotation speed is newly set. Replaced as the second rotation speed,
Rotating at the new first rotation speed and the new second rotation speed,
Repeat the control to compare the magnitude of vibration at the new first rotation speed and the new second rotation speed, and compare the vibration at the small rotation speed and the vibration at the new rotation speed. Yuki, when the rotation speed becomes a small rotation speed by comparing two rotation speeds twice in a row, or when the rotation speed reaches a predetermined maximum rotation speed or minimum rotation speed, The electric fan according to any one of claims 1 to 5, wherein the electric fan is controlled. The controller is
After detecting the magnitude of vibration for one reciprocation at each of multiple rotation speeds,
Compare the magnitude of the largest vibration in one reciprocation at each rotation speed,
The electric fan according to any one of claims 1 to 7, wherein the rotating unit is controlled to a rotation speed with the smallest vibration in one reciprocation at each rotation speed.