Blower

Abstract

Provided is a fan capable of easily removing dust attached onto a fan blade.　A fan (1) is provided with a control unit (8) that rotates a fan motor (2a) and a fan blade (3). Even if an airflow is generated in a first air blowing direction and dust is attached onto the fan blade as the fan motor (2a) and the fan blade (3) rotate in a first rotating direction (arrow A direction), the fan motor (2a) and the fan blade (3) are rotated in a second rotating direction (arrow B direction) different from the first rotating direction, whereby an airflow is generated in a second air blowing direction different from the first air blowing direction, and dust attached onto the fan blade can be removed from the fan blade (3).

Description

[Technical field]

[0001] The present invention relates to a blower. [Background technology]

[0002] Electric fans, which blow air by rotating the fan, can have dust attached to the fan. Electric fans, which are a type of blower, are configured so that some of the components are removable so that users can remove dust that has adhered to the fan.

[0003] An electric fan with such a configuration is disclosed in Patent Document 1. Patent Document 1 discloses an electric fan that includes a motor, a fan attached to the motor, a fan guard part that covers the fan, a clip that fixes the fan guard part, and a spinner that fixes the fan to the motor. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2014-196747 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the electric fan disclosed in Patent Document 1, in order to remove dust adhering to the fan, the user must remove the clip, the fan guard portion, and the spinner, which requires a lot of time and effort from the user.

[0006] The present disclosure has been made to solve the above-mentioned problems, and has an object to provide a blower that allows a user to easily remove dust that has adhered to the fan. [Means for solving the problem]

[0007] The blower according to the present disclosure includes a fan motor, a control unit that rotates the fan motor in a first rotational direction and a second rotational direction different from the first rotational direction, and a fan that is provided in the fan motor and generates an airflow in a first air blowing direction when the fan motor rotates in the first rotational direction, and generates an airflow in a second air blowing direction different from the first air blowing direction when the fan motor rotates in the second rotational direction. Effect of the Invention

[0008] The blower according to the present disclosure includes a control unit that rotates a fan motor in a first rotation direction and a second rotation direction different from the first rotation direction, and a fan that generates an airflow in a first airflow direction when the fan motor rotates in the first rotation direction and generates an airflow in a second airflow direction different from the first airflow direction when the fan motor rotates in the second rotation direction. This provides the effect that even if the fan motor and the fan rotate in the first rotation direction to generate an airflow in the first airflow direction and cause dust to adhere to the fan, the fan motor and the fan can be rotated in the second rotation direction different from the first rotation direction to generate an airflow in the second airflow direction different from the first airflow direction, thereby blowing away the dust adhered to the fan from the fan. [Brief description of the drawings]

[0009] [Figure 1] 1 is a schematic diagram showing an electric fan according to a first embodiment. [Diagram 2] 2 is a block diagram showing the configuration of a control system of the electric fan according to the first embodiment. FIG. [Diagram 3] FIG. 2 is an external perspective view of the electric fan according to the first embodiment, as viewed from the rear. [Figure 4] 4 is a perspective view showing the electric fan in FIG. 3 with a motor cover removed. FIG. [Diagram 5] FIG. 1 is a schematic diagram showing a fan of an electric fan according to a first embodiment. [Figure 6] FIG. 2 is a schematic diagram showing a grill of the electric fan according to the first embodiment. [Figure 7]1 is an external view showing an operation unit of an electric fan according to a first embodiment. [Figure 8] FIG. 1 is a simplified circuit diagram of an electric fan according to a first embodiment. [Figure 9] FIG. 2 is a simplified circuit diagram when the electric fan according to the first embodiment is in a fan-blowing operation state. [Figure 10] FIG. 4 is a simplified circuit diagram when the electric fan according to the first embodiment is in a cleaning operation state. [Figure 11] 5 is a flowchart showing a control flow during a cleaning operation of the electric fan according to the first embodiment. [Figure 12] FIG. 4 is an external view showing a modified example of the operation unit of the electric fan according to the first embodiment. [Figure 13] FIG. 11 is a simplified circuit diagram of an electric fan according to a second embodiment. [Figure 14] FIG. 11 is a simplified circuit diagram when the electric fan according to the second embodiment is in a fan blowing operation state. [Figure 15] FIG. 11 is a simplified circuit diagram when the electric fan according to the second embodiment is in a cleaning operation state. [Figure 16] 11 is a flowchart showing a control flow during a cleaning operation of an electric fan according to the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] First, in each figure, the arrangement and orientation of the devices and parts are defined by the directions of the three-axis Cartesian coordinate system, which are mutually orthogonal, that is, the arrows X, Y, and Z. The direction indicated by arrow Y is perpendicular to the vertical direction. The direction indicated by arrow X is referred to as the left-right direction. The origin side of arrow X is referred to as the left. The tip side of arrow X is referred to as the right. The direction indicated by arrow Y is referred to as the front-to-back direction. The tip side of arrow Y is referred to as the front. The origin side of arrow Y is referred to as the rear. The direction indicated by arrow Z is parallel to the vertical direction. The direction indicated by arrow Z is referred to as the up-down direction. The origin side of arrow Z is referred to as the down side. The tip side of arrow Z is referred to as the up side. Note that these names have been established for the convenience of explanation and do not limit the arrangement and orientation of devices and parts, etc.

[0011] Embodiment 1 Fig. 1 is a schematic diagram showing an electric fan 1 according to embodiment 1. Fig. 2 is a block diagram showing the configuration of a control system of electric fan 1 according to embodiment 1. The blower according to embodiment 1 is an electric fan. Electric fan 1 includes an electric motor unit 2, a fan 3, a grill 4, a support unit 5, a base unit 6, an operation unit 7, and a control unit 8.

[0012] FIG. 3 is an external perspective view of the electric motor unit 2 of the electric fan 1 according to the first embodiment, seen from the rear. FIG. 4 is an external perspective view of the electric fan 1 in FIG. 3 with the electric motor unit cover 2d removed. The electric motor unit 2 is provided on the support 5 so as to be rotatable in the vertical direction, and includes a fan motor 2a, a vertical oscillating motor 2b, a first gear 2c, and an electric motor unit cover 2d. The fan motor 2a has a first rotating shaft (not shown) protruding in a direction parallel to the Y axis, and rotates the first rotating shaft (not shown) according to the control of the control unit 8. The vertical oscillating motor 2b has a second rotating shaft (not shown) protruding in a direction parallel to the X axis, and rotates the second rotating shaft (not shown) according to the control of the control unit 8. The first gear 2c is a gear attached to the second rotating shaft (not shown), and rotates around the second rotating shaft (not shown). The first gear 2c is adapted to mesh with a support-side first gear (not shown) of the support 5, which will be described later. In other words, the vertical oscillation motor 2b is capable of rotating relative to the first gear (not shown) on the support pole side via the first gear 2c. As a result, the rotation of the vertical oscillation motor 2b causes the electric motor unit 2 to rotate vertically. In other words, the vertical oscillation motor 2b performs the vertical oscillation operation of the electric fan 1. The electric motor unit cover 2d is a cover that covers the fan motor 2a, the vertical oscillation motor 2b, and the first gear 2c. Also, in the first embodiment, the fan motor 2a is AC ( Alternating Current motor.

[0013] In addition, the number of rotations per unit time of the fan motor 2a is set in five steps in advance. This setting of the number of rotations per unit time is called the air volume mode. The setting with the fewest number of rotations per unit time is called the air volume mode 1. Let the number of rotations per unit time in the air volume mode 1 be N1. The setting with the second fewest number of rotations per unit time after the air volume mode 1 is called the air volume mode 2. Let the number of rotations per unit time in the air volume mode 2 be N2. The setting with the third fewest number of rotations per unit time after the air volume mode 2 is called the air volume mode 3. Let the number of rotations per unit time in the air volume mode 3 be N3. The setting with the fourth fewest number of rotations per unit time after the air volume mode 3 is called the air volume mode 4. Let the number of rotations per unit time in the air volume mode 4 be N4. The setting with the fifth fewest number of rotations per unit time after the air volume mode 4 is called the air volume mode 5. Let the number of rotations per unit time in the air volume mode 5 be N5. That is, for the setting of the air volume mode, the relationship N1 < N2 < N3 < N4 < N5 holds.

[0014] FIG. 5 is a schematic view showing the fan 3 of the electric fan 1 according to the first embodiment. The fan 3 is attached to the first rotating shaft (not shown) of the fan motor 2a. The fan 3 is a propeller fan and rotates in the same direction by the rotation of the fan motor 2a to generate an air current. When the fan 3 rotates in the direction of arrow A, an air current is generated in the forward direction, that is, in the direction from the motor unit 2 toward the fan 3. Also, when the fan 3 rotates in the direction of arrow B, an air current is generated in the rearward direction, that is, in the direction from the fan 3 toward the motor unit 2. Hereinafter, the rotation of the fan motor 2a and the fan 3 in the direction of arrow A is referred to as the electric fan 1 rotating forward, and the rotation of the fan motor 2a and the fan 3 in the direction of arrow B is referred to as the electric fan 1 rotating in reverse. When the electric fan 1 rotates in reverse, an air current in a blowing direction different from that during forward rotation is generated with respect to the dust attached to the fan during forward rotation of the electric fan 1, and the dust attached to the fan 3 during forward rotation can be blown off.

[0015] FIG. 6 is a schematic diagram showing the grill 4 of the electric fan 1 according to the first embodiment. The grill 4 is a case with slits formed therein and attached to the motor unit 2 so as to surround the fan 3. Since the grill 4 is attached so as to surround the fan 3, the grill 4 can prevent the user from touching the rotating fan 3. The grill 4 includes a rear grill 4a and a front grill 4b. The rear end of the rear grill 4a is attached to the motor unit 2, and the front end is located in front of the fan 3. The front grill 4b is attached to the front end of the rear grill 4a. By attaching the front grill 4b to the front end of the rear grill 4a, the fan 3 is surrounded by the grill 4 from the front and rear directions. The rear grill 4a and the front grill 4b are each provided with a fixing portion 4c for attaching the front grill 4b to the rear grill 4a.

[0016] The support column 5 is a rod-shaped support extending in the vertical direction. A support column-side first gear (not shown) that rotates around the X-axis is fixed to the upper end of the support column 5, and a support column-side second gear (not shown) that rotates around the Z-axis is fixed to the lower end of the support column 5. The electric motor section 2 is attached to the upper end of the support column 5, and the first gear 2c and the support column-side first gear (not shown) mesh with each other. A base section 6 is attached to the lower end of the support column 5.

[0017] The base 6 is a circular base that supports the support column 5. Inside the base 6, a left-right swing motor (not shown) and a second gear (not shown) are installed. The left-right swing motor (not shown) has a third rotation shaft (not shown) that protrudes in a direction parallel to the Z axis, and rotates the third rotation shaft (not shown) according to the control of the control unit 8. The second gear (not shown) is a gear attached to the third rotation shaft (not shown) and rotates around the third rotation shaft (not shown). The second gear (not shown) is adapted to mesh with the support column side second gear (not shown). In other words, the left-right swing motor (not shown) is adapted to rotate the support column side second gear (not shown) via the second gear (not shown). As a result, the left-right swing motor (not shown) rotates around the third rotation shaft, causing the support column side second gear (not shown) to rotate and the support column 5 to rotate. In other words, the left-right swing motor (not shown) performs a left-right swing operation of the electric fan 1.

[0018] The operation unit 7 is a plurality of buttons provided so as to be exposed on the base 6. FIG. 7 is an external view showing the operation unit 7 of the electric fan 1 according to the first embodiment. As shown in FIG. 7, the operation unit 7 includes a power button 7a, an air volume decrease button 7b, an air volume increase button 7c, a cleaning button 7d, an up-down swing button 7e, and a left-right swing button 7f. Each button on the operation unit 7 is connected to the control unit 8. When a user operates a button, the control unit 8 generates a command signal corresponding to the operated button. The operation of each button when it is operated will be described later. The cleaning button 7d includes a light source (not shown), and when operated, it turns on, turns off, or blinks.

[0019] The control unit 8 is a microprocessor provided inside the base unit 6. The control unit 8 controls the fan motor 2a, the up-down oscillating motor 2b, and the left-right oscillating motor (not shown) based on a command signal generated by the operation unit 7. The details of the control will be described later.

[0020] Next, the control of the electric fan 1 of the first embodiment will be described. When the power button 7a is pressed, the control unit 8 generates a command signal for switching the fan motor 2a between rotation and stop. When the fan motor 2a is stopped, the power button 7a is operated, and the control unit 8 transmits a forward rotation start signal to the fan motor 2a to rotate the fan motor 2a in the direction of the arrow A. When the fan motor 2a receives the forward rotation start signal, it rotates in the direction of the arrow A. As a result, the electric fan 1 rotates the fan 3 to generate an airflow forward, that is, in the direction from the electric motor unit 2 to the fan 3. On the other hand, when the fan motor 2a is rotating, the power button 7a is operated, and the control unit 8 transmits a forward rotation stop signal to the fan motor 2a to stop the fan motor 2a. When the fan motor 2a receives the forward rotation stop signal, it stops rotating. In other words, when the power button 7a is pressed while the fan motor 2a is stopped rotating, the fan motor 2a rotates in the direction of the arrow A and the electric fan 1 rotates forward. Hereinafter, the state in which the electric fan 1 is rotating in the forward direction will be referred to as the fan operation state. When the power button 7a is pressed while the fan motor 2a is rotating, the fan motor 2a stops. Hereinafter, the state in which the fan motor 2a is stopped will be referred to as the stopped state.

[0021] When the airflow reduction button 7b is pressed, the control unit 8 outputs a rotation speed reduction signal to the fan motor 2a to reduce the number of rotations per unit time of the fan motor 2a and reduce the amount of air blown by the fan 3 per unit time. When the fan motor 2a receives the rotation speed reduction signal, it reduces the number of rotations per unit time by a predetermined amount. In other words, when the airflow reduction button 7b is pressed, the airflow mode of the fan motor 2a is lowered by one level, and the amount of air blown by the fan 3 per unit time is reduced.

[0022] When the airflow increase button 7c is pressed, the control unit 8 outputs a rotation speed increase signal to the fan motor 2a to increase the rotation speed per unit time of the fan motor 2a and increase the amount of air blown by the fan 3 per unit time. When the fan motor 2a receives the rotation speed increase signal, it increases the rotation speed per unit time by a predetermined amount. In other words, when the airflow increase button 7c is pressed, the airflow mode of the fan motor 2a is increased by one step, and the amount of air blown by the fan 3 per unit time is increased.

[0023] When the cleaning button 7d is pressed, the control unit 8 generates a command signal for switching between performing a cleaning operation and stopping the cleaning operation. When performing a cleaning operation, the control unit 8 operates the cleaning button 7d, and then transmits a forward rotation stop signal for stopping the fan motor 2a, and then transmits a reverse rotation start signal to the fan motor 2a to rotate the fan motor 2a in the direction of arrow B after a first time has elapsed. The first time is the time required from the stop of the fan motor 2a until the fan 3 rotating by inertia completely stops. When the fan motor 2a receives the reverse rotation start signal, it rotates in the direction of arrow B in a predetermined air volume mode for a second time. The second time is a preset time, for example, 30 seconds. This causes the electric fan 1 to rotate the fan 3 and generate an airflow backward, that is, in the direction from the fan 3 to the motor unit 2, and can remove dust adhering to the fan 3. On the other hand, when stopping the cleaning operation, the control unit 8 operates the cleaning button 7d, and then transmits a forward rotation stop signal for stopping the fan motor 2a, and then transmits a reverse rotation start signal to the fan motor 2a without transmitting the reverse rotation start signal to the fan motor 2a. In addition, in order to inform the controller 8 whether it has generated a command signal to perform cleaning operation or to stop cleaning operation, the light source (not shown) of the cleaning button 7d is controlled to light up when a command signal to perform cleaning operation is received, and to turn off when a command signal to stop cleaning operation is received. Hereinafter, the state in which the fan motor 2a rotates in the direction of the arrow B and the electric fan 1 rotates in reverse is called the cleaning operation state. Note that, when the power button 7a is pressed in the cleaning operation state, the controller 8 controls the fan motor 2a to rotate in the direction of the arrow A after the fan motor 2a rotates in the direction of the arrow B for a second time. At this time, in order to inform the electric fan 1 that the cleaning operation state is in, the light source (not shown) of the cleaning button 7d flashes for a predetermined time. In addition, when the cleaning button 7d is pressed again in the cleaning operation state, the controller 8 transmits a reverse rotation stop signal to the fan motor 2a to stop the fan motor 2a. The fan motor 2a stops rotating when it receives the reverse rotation stop signal. The first time period and the second time period are determined by experimental measurements.For example, the time from when the fan motor 2a stops until the fan 3 rotating by inertia completely stops is derived by simulation or experiment, and the first time is set to a time equal to or longer than the derived time. Also, the time from when the cleaning operation state starts until the dust attached to the fan 3 is blown away is derived by simulation or experiment, and the second time is set to a time equal to or longer than the derived time.

[0024] When the up-down swing button 7e is pressed, the control unit 8 switches the up-down swing motor 2b between operation and stop. When the up-down swing motor 2b is stopped, the up-down swing button 7e is operated, and the control unit 8 transmits an up-down swing start signal to the up-down swing motor 2b to rotate the rotating shaft of the up-down swing motor 2b. When the up-down swing start signal is received, the up-down swing motor 2b rotates and rotates the electric motor unit 2 in the vertical direction. On the other hand, when the up-down swing motor 2b is rotating, the control unit 8 transmits an up-down swing stop signal to the up-down swing motor 2b to stop the up-down swing motor 2b by operating the up-down swing button 7e. When the up-down swing stop signal is received, the up-down swing motor 2b stops rotating. In other words, when the up-down swing button 7e is pressed while the up-down swing motor 2b is stopped, the up-down swing motor 2b rotates and the electric motor unit 2 rotates in the vertical direction. Hereinafter, this state is called the up-down swing operation state. When the up-down swing button 7e is pressed while the up-down swing motor 2b is rotating, the up-down swing motor 2b stops, whereby the motor unit 2 can be fixed in any direction in the vertical direction.

[0025] When the left-right swing button 7f is pressed, the control unit 8 switches the left-right swing motor 6a between operation and stop. When the left-right swing motor 6a is stopped, the left-right swing button 7f is operated, and the control unit 8 transmits a left-right swing start signal to the left-right swing motor 6a to rotate the fan motor 2a. When the left-right swing start signal is received, the left-right swing motor 6a rotates and rotates the support column 5 in a direction perpendicular to the vertical direction. On the other hand, when the left-right swing motor 6a is rotating, the control unit 8 transmits a left-right swing stop signal to the left-right swing motor 6a to stop the left-right swing motor 6a by operating the left-right swing button 7f. When the left-right swing stop signal is received, the left-right swing motor 6a stops rotating. In other words, when the left-right swing button 7f is pressed while the left-right swing motor 6a is stopped rotating, the left-right swing motor 6a rotates and rotates the support column 5 in a direction perpendicular to the vertical direction. Hereinafter, this state is called a left-right swing operation state. When the left and right swing motor 6a is rotating, the left and right swing button 7 f When this button is pressed, the left-right swing motor 6a stops. This allows the motor unit 2 to be fixed in any direction perpendicular to the vertical direction.

[0026] Next, a configuration in which the fan motor 2a can switch the rotation direction between the direction of the arrow A and the direction of the arrow B will be described. FIG. 8 is a simplified circuit diagram showing a configuration in which the rotation direction of the fan motor 2a of the electric fan 1 according to the first embodiment can be switched. FIG. 9 is a simplified circuit diagram when the electric fan 1 according to the first embodiment is in a blowing operation state. FIG. 10 is a simplified circuit diagram when the electric fan 1 according to the first embodiment is in a cleaning operation state. The AC circuit 100 is a circuit that can switch the rotation direction of the fan motor 2a, which is an AC motor. The AC circuit 100 has a first control circuit 101, a power source 102, a first relay 103, a second relay 104, a third relay 105, a fourth relay 106, and the fan motor 2a. The fan motor 2a also has an M coil 107, an S coil 108, and a capacitor 109. The first control circuit 101 is a part of the control unit 8, and flows an AC current according to a command signal generated by the operation unit 7. The power source 102 supplies electricity to the electric fan 1. When the first relay 103 is ON, it is in a position where it connects one side of the M coil 107 and one side of the S coil 108. When the second relay 104 is ON, it connects the S coil 108 Other The third relay 105 is in a position to connect one side of the S coil 108 to one side of the capacitor 109 when it is ON. The fourth relay 106 is in a position to connect the control circuit to the other side of the S coil 108 when it is ON. The M coil 107 and the S coil 108 generate a rotating magnetic field when a current flows through them, and rotate a first rotating shaft (not shown). The capacitor 109 is for changing the phase period of the current. In other words, the fan motor 2a, which is an AC motor, can change the direction of the rotating magnetic field and switch the rotation direction of the first rotating shaft (not shown) by changing the direction of the current flowing through the S coil 108 relative to the current flowing through the M coil 107.

[0027] First, the operation of putting the fan motor 2a into the blowing operation state, that is, rotating the first rotating shaft of the fan motor 2a in the direction of arrow A, will be described. In the blowing operation state, the AC circuit 100 turns on the first relay 103 and the second relay 104, and turns off the third relay 105 and the fourth relay 106, as shown in FIG. 9. In this state, when the current output from the first control circuit 101 flows through the M coil 107 in the direction of arrow C, a current also flows through the S coil 108 in the direction of arrow C. Next, the operation of putting the fan motor 2a into the cleaning operation state, that is, rotating the first rotating shaft of the fan motor 2a in the direction of arrow B, will be described. In the cleaning operation state, the AC circuit 100 turns on the first relay 103 and the second relay 104, and turns off the third relay 105 and the fourth relay 106, as shown in FIG. 10 1, the first relay 103 and the second relay 104 are turned OFF, and the third relay 105 and the fourth relay 106 are turned ON. In this state, when the current output from the first control circuit 101 flows through the M coil 107 in the direction of arrow C, a current flows through the S coil 108 in the direction of arrow D. In this manner, in the AC circuit 100, by switching the first relay 103, the second relay 104, the third relay 105, and the fourth relay 106, the direction of the current flowing through the S coil 108 relative to the M coil 107 is switched, thereby changing the direction of the rotating magnetic field, and the rotation direction of the first rotating shaft (not shown) can be switched. In other words, the rotation direction of the fan motor 2a can be switched.

[0028] Next, the control flow of the electric fan 1 of the first embodiment will be described. Fig. 11 is a flowchart showing the control flow during cleaning operation of the electric fan 1 according to the first embodiment. When the control unit 8 transmits a forward rotation stop signal to the fan motor 2a, the following flow is started. Note that the air volume down button 7b, the air volume up button 7c, the up-down swing button 7e, and the left-right swing button 7f are existing technologies, so their explanation will be omitted here.

[0029] First, in S1-1, it is confirmed whether or not a cleaning operation command is received. That is, when the control unit 8 transmits a reverse rotation start signal for executing a cleaning operation, S1-2 If the control unit 8 has not transmitted a reverse rotation start signal for carrying out a cleaning operation, this flow ends.

[0030] Next, in S1-2, a cleaning operation start process is performed. In the cleaning operation start process, the fan motor 2a receives a reverse rotation start signal and starts rotating in the direction of the arrow B.

[0031] Next, in S1-3, a cleaning operation process is performed. The cleaning operation process is a process in which the electric fan 1 rotates in the reverse direction.

[0032] Next, in S1-4, it is confirmed whether or not there is a cleaning stop command. That is, if the control unit 8 transmits a reverse rotation stop signal to stop the rotation of the fan motor 2a, it is determined that there is a cleaning stop command, and the process proceeds to S1-5. If the control unit 8 does not transmit a reverse rotation stop signal to stop the rotation of the fan motor 2a, it is determined that there is no cleaning stop command, and the process returns to S1-3 to continue the cleaning operation process. After the second time has elapsed, the control unit 8 transmits a reverse rotation stop signal to the fan motor 2a to stop the rotation of the fan motor 2a.

[0033] Next, in S1-5, a cleaning operation stop process is performed. The cleaning operation stop process is a process in which the fan motor 2a receives a reverse rotation stop signal and stops rotating.

[0034] As described above, the electric fan 1 of the first embodiment can automatically start cleaning operation after stopping the fan operation by the user pressing the cleaning button 7d.

[0035] The electric fan 1 of the first embodiment configured as described above includes a fan motor 2a, a control unit 8 that rotates the fan motor 2a in a first rotation direction (corresponding to the direction of the arrow A) and a second rotation direction (corresponding to the direction of the arrow B) different from the first rotation direction, and a fan 3 that is provided in the fan motor 2a and generates an airflow in a first airflow direction (corresponding to the front) when the fan motor 2a rotates in the first rotation direction, and generates an airflow in a second airflow direction (corresponding to the rear) different from the first airflow direction when the fan motor 2a rotates in the second rotation direction. As a result, even if dust adheres to the fan 3 due to the airflow generated in the fan blowing operation state, that is, the forward airflow generated by the rotation of the fan motor 2a and the fan 3 in the direction of the arrow A, the electric fan 1 can be put into a cleaning operation state to rotate the fan motor 2a and the fan 3 in the direction of the arrow B to generate a backward airflow, thereby blowing off and removing the dust adhered to the fan 3. Furthermore, with this configuration, there is no need to change the material of the fan 3 to an antifouling material or perform a surface treatment to make it difficult for dust to adhere to the fan 3, which has the effect of reducing manufacturing costs.

[0036] The electric fan 1 according to the first embodiment is configured to include, as an additional component, a grill 4 surrounding the fan 3. With this additional component, the electric fan 1 can blow away and remove dust adhering to the grill by switching the electric fan 1 into a cleaning operation state.

[0037] The electric fan 1 according to the first embodiment has an additional configuration in which the fan motor 2a is an AC motor. This additional configuration has the effect of reducing the manufacturing costs of the electric fan 1 compared to a DC motor.

[0038] The electric fan 1 according to the first embodiment has an additional configuration including an operation unit (corresponding to the cleaning button 7d) that can switch between a state in which the fan motor 2a rotates in a first rotation direction (corresponding to the direction of the arrow A) (corresponding to the air blowing operation state) and a state in which the fan motor 2a rotates in a second rotation direction (corresponding to the direction of the arrow B) (corresponding to the cleaning operation state). This additional configuration has the effect that the electric fan 1 can perform a cleaning operation only when the user needs it. Also, even if a foreign object gets into the grill 4 during a cleaning operation and causes an abnormality in the fan 3, the user can immediately stop the fan motor 2a by operating the operation unit 7.

[0039] The electric fan 1 according to the first embodiment has, as an additional configuration, a configuration including a first oscillating motor (corresponding to the up-down oscillating motor 2b) that rotates the fan motor 2a and the fan 3 in the vertical direction. This additional configuration enables the electric fan 1 to orient the fan 3 in a direction having a vertical vector in the cleaning operation state, so that dust adhering to the fan 3 can be collected vertically below the fan 3. This provides the effect of facilitating the collection and disposal of dust removed from the fan 3.

[0040] The electric fan 1 according to the first embodiment has, as an additional configuration, a second oscillating motor (corresponding to the left-right oscillating motor 6a) that rotates the fan motor 2a and the fan 3 in a direction perpendicular to the vertical direction. This additional configuration provides the effect that the electric fan 1 can change the direction of the airflow generated by the fan 3 without moving the electric fan 1 in the air blowing operation state and the cleaning operation state.

[0041] In the electric fan 1 according to the first embodiment, as an additional configuration, after the fan motor 2a rotates in a first rotation direction (corresponding to the direction of the arrow A), the fan motor 2a The second rotation direction (arrow BThe additional configuration has a control unit 8 that rotates the cleaning device in the direction corresponding to the direction of rotation of the cleaning device. This additional configuration eliminates the need for a user to perform an operation to stop the cleaning operation, thereby reducing the time and effort required.

[0042] As a first modified example of the electric fan 1 of the first embodiment, the shape of the fan 3 is not limited to a propeller fan. The shape of the fan 3 may be any shape that generates an airflow in a first airflow direction when the fan motor 2a rotates in a first rotation direction, and generates an airflow in a second airflow direction different from the first airflow direction when the fan motor 2a rotates in a second rotation direction.

[0043] As a second modification of the electric fan 1 of the first embodiment, the location of the left-right swing motor 6a is not limited to the base 6, and may be any location as long as it can rotate the motor unit 2 in a direction perpendicular to the vertical direction. For example, it may be the lower end of the support column 5, the upper end of the support column 5, or the motor unit 2. Also, the left-right swing motor 6a does not have to be provided.

[0044] In a third modified example of electric fan 1 according to the first embodiment, the location of operation unit 7 is not limited to base 6. For example, electric fan 1 may be configured with a remote control, and operation unit 7 may be provided on the remote control.

[0045] As a fourth modification of the electric fan 1 according to the first embodiment, the control unit 8 is not limited to a microprocessor. For example, the control unit 8 may be a microcontroller.

[0046] As a fifth modified example of the electric fan 1 of the first embodiment, the button configuration of the operation unit 7 is not limited to that of the first embodiment. In addition, a configuration including a rhythm button that changes the airflow rate of the fan 3 over time, an OFF timer setting button that sets the power to be turned off after a predetermined time has elapsed, and an ON timer setting button that sets the power to be turned on after a predetermined time has elapsed, etc. may be considered. Also, the cleaning button 7d may not be provided. FIG. 12 is an external view showing a modified example of the operation unit 7 of the electric fan 1 according to the first embodiment. For example, as shown in FIG. 12, the operation unit 7 may only include a power button 7a, an air volume reduction button 7b, and an air volume increase button 7c. In this case, the cleaning operation is only automatically performed after the air blowing operation. That is, the control flow is the same as that of the control flow of FIG. 11 with S1-1 and S1-4 omitted. Alternatively, a configuration may be used in which a specific operation is performed on an existing button to provide the same function as the cleaning button 7d. For example, a configuration may be considered in which the same function as the cleaning button 7d is provided by pressing and holding the power button 7a. Such a configuration allows existing electric fan parts to be used, reducing manufacturing costs.

[0047] As a sixth modification of the electric fan 1 of the first embodiment, the control unit 8 may detect the time during which the fan is in the air blowing operation state, and may change the control of the cleaning operation according to the time during which the fan is in the air blowing operation state. For example, if the time during which the fan is in the air blowing operation state is equal to or shorter than a predetermined time, the cleaning operation may not be performed, or the second time may be lengthened as the time during which the fan is in the air blowing operation state is longer.

[0048] Embodiment 2 The electric fan 1 according to the second embodiment will be described. In the first embodiment, the electric fan 1 is Fan motor 2a In the second embodiment, the motor is an AC motor. Fan motor 2a In other words, the electric fan 1 according to the second embodiment has a different control circuit configuration that can switch the rotation direction of the fan motor 2a from that of the electric fan 1 according to the first embodiment. Fan motor 2a but DCExcept for the motor configuration, the configuration and control flow are the same as those of electric fan 1 according to embodiment 1. Description of the similar parts will be omitted in embodiment 2.

[0049] A configuration in which the fan motor 2a can switch the rotation direction between the direction of the arrow A and the direction of the arrow B will be described. FIG. 13 is a simplified circuit diagram showing a configuration in which the rotation direction of the fan motor 2a of the electric fan 1 according to the second embodiment can be switched. FIG. 14 is a simplified circuit diagram when the electric fan 1 according to the second embodiment is in a blowing operation state. FIG. 15 is a simplified circuit diagram when the electric fan 1 according to the second embodiment is in a cleaning operation state. The DC circuit 200 is a circuit that can switch the rotation direction of the fan motor 2a, which is a DC motor. The DC circuit 200 has a second control circuit 201, a power source 102, a fifth relay 202, a sixth relay 203, and the fan motor 2a. The second control circuit 201 is a part of the control unit 8, and passes a DC current according to a command signal generated by the operation unit 7. In other words, the second control circuit 201 has a function of converting an AC current supplied from the power source 102 into a DC current. The power source 102 supplies electricity to the electric fan 1. The fifth relay 202 has two connections, a first connection 202a and a second connection 202b. The sixth relay 203 has two connections, a third connection 203a and a fourth connection 203b. The first connection 202a is connected to one side of the fan motor 2a and the fourth connection 203b. of The second connection destination 202b is connected to the side of the fan motor 2a that is not connected to the first connection destination 202a and the third connection destination 203a. Connect The third connection destination 203a is connected to the second connection destination 202b and the fan motor 2a. On the other hand and Connect The fourth connection destination 203b is connected to the first connection destination 202a and the side of the fan motor 2a that is not connected to the third connection destination 203a. of Connected.

[0050] The operation of putting the fan motor 2a into the blowing operation state, that is, rotating the first rotating shaft of the fan motor 2a in the direction of the arrow A, will be described. In the blowing operation state, the DC circuit 200 connects the fifth relay 202 to the first connection destination 202a and the sixth relay 203 to the third connection destination 203a, as shown in FIG. 14. In this state, the current output from the second control circuit 201 flows in the direction of the arrow C. Next, the operation of putting the fan motor 2a into the cleaning operation state, that is, rotating the first rotating shaft of the fan motor 2a in the direction of the arrow B, will be described. In the cleaning operation state, the second control circuit 201 teeth 15, the fifth relay 202 is connected to the second connection destination 202b, and the sixth relay 203 is connected to the fourth connection destination 203b. In this state, the current output from the second control circuit 201 flows in the direction of arrow D, which is the opposite direction to the direction of arrow C. In this way, in the DC circuit 200, by switching the fifth relay 202 and the sixth relay 203, the direction of the current flowing through the fan motor 2a can be switched. In other words, the rotation direction of the fan motor 2a can be switched.

[0051] The electric fan 1 of the second embodiment configured as described above includes a fan motor 2a, a control unit 8 that rotates the fan motor 2a in a first rotation direction (corresponding to the direction of the arrow A) and a second rotation direction (corresponding to the direction of the arrow B) different from the first rotation direction, and a fan 3 that is provided in the fan motor 2a and generates an airflow in a first airflow direction (corresponding to the front) when the fan motor 2a rotates in the first rotation direction, and generates an airflow in a second airflow direction (corresponding to the rear) different from the first airflow direction when the fan motor 2a rotates in the second rotation direction. As a result, even if dust adheres to the fan 3 due to the airflow generated in the fan blowing operation state, that is, the forward airflow generated by the rotation of the fan motor 2a and the fan 3 in the direction of the arrow A, the electric fan 1 can be put into a cleaning operation state to rotate the fan motor 2a and the fan 3 in the direction of the arrow B to generate a backward airflow, thereby blowing off and removing the dust adhered to the fan 3. Furthermore, with this configuration, there is no need to change the material of the fan 3 to an antifouling material or perform a surface treatment to make it difficult for dust to adhere to the fan 3, which has the effect of reducing manufacturing costs.

[0052] The electric fan 1 according to the second embodiment has an additional configuration, that is, a grill 4 surrounding the fan 3. With this additional configuration, the electric fan 1 can blow away and remove dust adhering to the grill by switching the electric fan 1 into a cleaning operation state.

[0053] The electric fan 1 according to the second embodiment has an additional configuration in which the fan motor 2a is a DC motor. This additional configuration has the effect of reducing power consumption compared to an AC motor and reducing noise during operation.

[0054] The electric fan 1 according to the second embodiment has an additional configuration including an operation unit (corresponding to the cleaning button 7d) that can switch between a state in which the fan motor 2a rotates in a first rotation direction (corresponding to the direction of the arrow A) (corresponding to the air blowing operation state) and a state in which the fan motor 2a rotates in a second rotation direction (corresponding to the direction of the arrow B) (corresponding to the cleaning operation state). This additional configuration has the effect that the electric fan 1 can perform a cleaning operation only when the user needs it. Also, even if a foreign object gets into the grill 4 during a cleaning operation and causes an abnormality in the fan 3, the user can immediately stop the fan motor 2a by operating the operation unit 7.

[0055] The electric fan 1 according to the second embodiment has, as an additional configuration, a configuration including a first oscillating motor (corresponding to the up-down oscillating motor 2b) that rotates the fan motor 2a and the fan 3 in the vertical direction. This additional configuration enables the electric fan 1 to orient the fan 3 in a direction having a vertical vector in the cleaning operation state, so that dust adhering to the fan 3 can be collected vertically below the fan 3. This provides the effect of facilitating the collection and disposal of dust removed from the fan 3.

[0056] The electric fan 1 according to the second embodiment has, as an additional configuration, a second oscillating motor (corresponding to the left-right oscillating motor 6a) that rotates the fan motor 2a and the fan 3 in a direction perpendicular to the vertical direction. This additional configuration provides the effect that the electric fan 1 can change the direction of the airflow generated by the fan 3 without moving the electric fan 1 in the air blowing operation state and the cleaning operation state.

[0057] In the electric fan 1 according to the second embodiment, as an additional configuration, after the fan motor 2a rotates in a first rotation direction (corresponding to the direction of the arrow A), the fan motor 2a The second rotation direction (arrow BThe additional configuration has a control unit 8 that rotates the cleaning device in the direction corresponding to the direction of rotation of the cleaning device. This additional configuration eliminates the need for a user to perform an operation to stop the cleaning operation, thereby reducing the time and effort required.

[0058] In electric fan 1 of embodiment 2, similar to the first modified example of embodiment 1, the shape of fan 3 is not limited to a propeller fan.

[0059] In electric fan 1 of embodiment 2, similar to the second modification of embodiment 1, the location where left-right swing motor 6a is installed is not limited to base portion 6.

[0060] In electric fan 1 of embodiment 2, similar to the third modified example of embodiment 1, the location where operation unit 7 is installed is not limited to base unit 6.

[0061] In electric fan 1 of the second embodiment, similar to the fourth modification of the first embodiment, control unit 8 is not limited to a microprocessor.

[0062] In electric fan 1 of the second embodiment, similar to the fifth modification of the first embodiment, the button configuration of operation unit 7 is not limited to that of the first embodiment.

[0063] In the electric fan 1 of embodiment 2, as in the sixth variant of embodiment 1, the control unit 8 may detect the time during which the fan is in the blowing operation state, and change the control content of the cleaning operation depending on the time during which the fan is in the blowing operation state.

[0064] Embodiment 3 The electric fan 1 according to the third embodiment will be described. In the first and second embodiments, the electric fan 1 is configured to perform a cleaning operation in a predetermined air volume mode for a second time period after the blowing operation. In the third embodiment, the control content of the cleaning operation is changed according to the air volume mode during the blowing operation. The electric fan 1 according to the third embodiment is similar in configuration to the electric fan 1 according to the first or second embodiment, except for the flow of control. The description of the similar parts will be omitted in the third embodiment.

[0065] A description will be given of the control flow of the electric fan 1 according to embodiment 3. Fig. 16 is a flowchart showing the control flow during cleaning operation of the electric fan 1 according to embodiment 3.

[0066] S2-1 is the same as S1-1, so the explanation will be omitted. In S2-2, it is confirmed whether the air volume mode is 1. That is, if the air volume mode in the blowing operation state is 1, the process proceeds to S2-3. If the air volume mode in the blowing operation state is not 1, the process proceeds to S2-4.

[0067] Next, in S2-3, a strong cleaning operation setting process is performed. The strong cleaning operation setting process is a process in which the control unit 8 outputs a rotation speed increase signal to the fan motor 2a to increase the rotation speed per unit time of the fan motor 2a, sets the air volume mode to 5, and transmits a reverse rotation start signal to the fan motor 2a. Upon receiving the reverse rotation start signal, the fan motor 2a starts rotating in the direction of arrow B at the rotation speed per unit time of the air volume mode 5.

[0068] Next, in S2-4, it is confirmed whether the air volume mode is 2. That is, if the air volume mode in the blowing operation state is 2, the process proceeds to S2-5. If the air volume mode in the blowing operation state is not 2, the process proceeds to S2-6.

[0069] Next, in S2-5, a medium cleaning operation setting process is performed. The medium cleaning operation setting process is a process in which the control unit 8 outputs a rotation speed increase signal to the fan motor 2a to increase the rotation speed per unit time of the fan motor 2a, sets the air volume mode to 4, and transmits a reverse rotation start signal to the fan motor 2a. Upon receiving the reverse rotation start signal, the fan motor 2a starts rotating in the direction of arrow B at the rotation speed per unit time of the air volume mode 4.

[0070] Next, in S2-6, it is confirmed whether the air volume mode is 3. That is, if the air volume mode in the blowing operation state is 3, the process proceeds to S2-7. If the air volume mode in the blowing operation state is not 3, this flow ends. That is, in the control of this embodiment, if the air volume mode is 4 or 5, the electric fan 1 does not perform cleaning operation.

[0071] Next, in S2-7, a weak cleaning operation setting process is performed. The weak cleaning operation setting process is a process in which the control unit 8 outputs a rotation speed increase signal to the fan motor 2a to increase the rotation speed per unit time of the fan motor 2a, sets the air volume mode to 3, and sends a reverse rotation start signal to the fan motor 2a. Upon receiving the reverse rotation start signal, the fan motor 2a starts rotating in the direction of arrow B at the rotation speed per unit time of the air volume mode 3.

[0072] Since steps S2-8 to S2-11 are the same as steps S1-2 to S1-5, respectively, their explanations will be omitted. As described above, the electric fan 1 of the third embodiment can change the control content in the cleaning operation state according to the air volume mode in the blowing operation state by the user pressing the cleaning button 7d.

[0073] The electric fan 1 of the third embodiment configured as described above includes a fan motor 2a, a control unit 8 that rotates the fan motor 2a in a first rotation direction (corresponding to the direction of the arrow A) and a second rotation direction (corresponding to the direction of the arrow B) different from the first rotation direction, and a fan 3 that is provided in the fan motor 2a and generates an airflow in a first airflow direction (corresponding to the front) when the fan motor 2a rotates in the first rotation direction, and generates an airflow in a second airflow direction (corresponding to the rear) different from the first airflow direction when the fan motor 2a rotates in the second rotation direction. As a result, even if dust adheres to the fan 3 due to the airflow generated in the fan blowing operation state, that is, the forward airflow generated by the rotation of the fan motor 2a and the fan 3 in the direction of the arrow A, the electric fan 1 can be put into a cleaning operation state to rotate the fan motor 2a and the fan 3 in the direction of the arrow B to generate a backward airflow, thereby blowing off and removing the dust adhered to the fan 3. Furthermore, with this configuration, there is no need to change the material of the fan 3 to an antifouling material or perform a surface treatment to make it difficult for dust to adhere to the fan 3, which has the effect of reducing manufacturing costs.

[0074] The electric fan 1 according to the third embodiment has an additional configuration, that is, a grill 4 surrounding the fan 3. With this additional configuration, the electric fan 1 can blow away and remove dust adhering to the grill by switching the electric fan 1 into a cleaning operation state.

[0075] The electric fan 1 according to the third embodiment has an additional configuration in which the fan motor 2a is an AC motor. This additional configuration has the effect of reducing the manufacturing costs of the electric fan 1 compared to a DC motor.

[0076] The electric fan 1 according to the third embodiment has an additional configuration including an operation unit (corresponding to the cleaning button 7d) that can switch between a state in which the fan motor 2a rotates in a first rotation direction (corresponding to the direction of the arrow A) (corresponding to the air blowing operation state) and a state in which the fan motor 2a rotates in a second rotation direction (corresponding to the direction of the arrow B) (corresponding to the cleaning operation state). This additional configuration has the effect that the electric fan 1 can perform a cleaning operation only when the user needs it. Also, even if a foreign object gets into the grill 4 during a cleaning operation and causes an abnormality in the fan 3, the user can immediately stop the fan motor 2a by operating the operation unit 7.

[0077] The electric fan 1 according to the third embodiment has, as an additional configuration, a configuration including a first oscillating motor (corresponding to the up-down oscillating motor 2b) that rotates the fan motor 2a and the fan 3 in the vertical direction. This additional configuration enables the electric fan 1 to orient the fan 3 in a direction having a vertical vector in the cleaning operation state, so that dust adhering to the fan 3 can be collected vertically below the fan 3. This provides the effect of facilitating the collection and disposal of dust removed from the fan 3.

[0078] The electric fan 1 according to the third embodiment has an additional configuration including a second oscillating motor (corresponding to the left-right oscillating motor 6a) that rotates the fan motor 2a and the fan 3 in a direction perpendicular to the vertical direction. This additional configuration enables the electric fan 1 to change the direction of the airflow generated by the fan 3 without moving the electric fan 1 in the air blowing operation state and the cleaning operation state.

[0079] In the electric fan 1 according to the third embodiment, as an additional configuration, after the fan motor 2a rotates in a first rotation direction (corresponding to the direction of the arrow A), the fan motor 2a The second rotation direction (arrow BThe additional configuration has a control unit 8 that rotates the cleaning device in the direction corresponding to the direction of rotation of the cleaning device. This additional configuration eliminates the need for a user to perform an operation to stop the cleaning operation, thereby reducing the time and effort required.

[0080] The electric fan 1 according to the third embodiment has, as an additional configuration, a configuration in which the number of rotations per unit time of the fan motor 2a when rotating in the second rotation direction (corresponding to the direction of the arrow B) is made greater than the number of rotations per unit time of the fan motor 2a in the first rotation direction after the fan motor 2a rotates in the first rotation direction (corresponding to the direction of the arrow A). Here, the intention of changing the control content of the cleaning operation according to the air volume mode during the air blowing operation will be explained. For this purpose, the principle of dust adhesion to the fan 3 will be explained first. When the electric fan 1 rotates forward, the fan 3 generates an airflow in the direction from the electric motor unit 2 toward the fan 3. At this time, dust floating around the electric fan 1 is also attracted to the fan 3 together with the air. Furthermore, since the fan 3 rotates while in contact with the air, friction occurs between the fan 3 and the air, and static electricity is generated in the fan 3. As a result, the dust attracted to the fan 3 adheres to the fan 3 due to the static electricity of the fan 3. Here, when the volume of air blown by the electric fan 1 is large, the rotation of the fan 3 is fast, so a strong centrifugal force is generated on the dust adhering to the fan 3, and the dust is less likely to adhere to the fan 3. Also, when the volume of air blown by the electric fan 1 is small, the rotation of the fan 3 is slow, so a weak centrifugal force is generated on the dust adhering to the fan 3, and the dust is more likely to adhere to the fan 3. In other words, the degree to which dust adheres to the fan 3 differs depending on the air volume mode during the fan operation, so the control content of the cleaning operation is changed depending on the air volume mode during the fan operation. With this additional configuration, when there is a low possibility of dust adhering to the fan 3, the electric fan 1 does not perform the cleaning operation or lowers the air volume mode, thereby reducing waste of power consumption. Reduce This also has the effect of reducing noise during operation.

[0081] In electric fan 1 of embodiment 3, similar to the first modified example of embodiment 1, the shape of fan 3 is not limited to a propeller fan.

[0082] In electric fan 1 of embodiment 3, similar to the second modification of embodiment 1, the location where left-right swing motor 6a is installed is not limited to base portion 6.

[0083] In electric fan 1 of the third embodiment, similar to the third modification of the first embodiment, the location where operation unit 7 is installed is not limited to base unit 6.

[0084] In electric fan 1 of the third embodiment, similar to the fourth modification of the first embodiment, control unit 8 is not limited to a microprocessor.

[0085] In electric fan 1 of the third embodiment, similar to the fifth modification of the first embodiment, the button configuration of operation unit 7 is not limited to that of the first embodiment.

[0086] In the electric fan 1 of embodiment 3, as in the sixth variant of embodiment 1, the control unit 8 may detect the time during which the fan is in the blowing operation state, and change the control content of the cleaning operation depending on the time during which the fan is in the blowing operation state.

[0087] As a first modified example of the electric fan 1 of the third embodiment, the strong cleaning operation setting process in S2-3, the medium cleaning operation setting process in S2-5, and the weak cleaning operation setting process in S2-7 may set the time for performing the cleaning operation, i.e., the second time, without setting the air volume mode. In other words, after the fan motor 2a rotates in the first rotation direction (corresponding to the direction of arrow A), the time (corresponding to the second time) for which the fan motor 2a rotates in the second rotation direction (corresponding to the direction of arrow B) is lengthened as the number of rotations in the first rotation direction (corresponding to the direction of arrow A) per unit time of the fan motor decreases. With this additional configuration, the electric fan 1 does not perform the cleaning operation or shortens the second time when there is a low possibility of dust adhering to the fan 3, thereby reducing waste of power consumption. Reduce This has the effect of making it possible to S2-3The strong cleaning operation setting process in S2-3, the medium cleaning operation setting process in S2-5, and the weak cleaning operation setting process in S2-7 may set both the air volume mode and the second time. For example, the strong cleaning operation setting process in S2-3 may set the air volume mode to 5 and the second time to 30 seconds, the medium cleaning operation setting process in S2-5 may set the air volume mode to 4 and the second time to 20 seconds, and the weak cleaning operation setting process in S2-7 may set the air volume mode to 3 and the second time to 10 seconds.

[0088] As a second modification of the electric fan 1 of the third embodiment, the settings of the air volume modes in the strong cleaning operation setting process in S2-3, the medium cleaning operation setting process in S2-5, and the weak cleaning operation setting process in S2-7 may be the same. In this case, S2-2, S2-4, and S2-6 can be combined.

[0089] As a third modification of the electric fan 1 of the third embodiment, the fan motor 2a of the electric fan 1 according to the third embodiment may be a DC motor. This additional configuration has the effect of reducing power consumption compared to an AC motor and reducing noise during operation.

[0090] It should be noted that the numbers for the air volume modes described above are merely examples, and the above-described embodiments are not limited to these.

[0091] In the above embodiment, an electric fan has been described as an example of a blower, but the blower is not limited to an electric fan. Any blower equipped with a fan, such as a ventilation fan or an outdoor unit of an air conditioner, may be used. [Explanation of symbols]

[0092] 1 electric fan, 2 motor unit, 2a fan motor, 2b up-down oscillating motor, 2c first gear, 2d motor unit cover, 3 fan, 4 grill, 4a rear grill, 4b front grill, 4c fixing part, 5 Support part, 6 Base part, 6a Left and right swing motor,7 Operation unit, 7a Power button, 7b Airflow down button, 7c Airflow up button, 7d Clean button, 7e Up and down swing button, 7f Left and right swing button, 8 Control unit, 100 AC circuit, 101 First control circuit, 102 Power source, 103 First relay, 104 Second relay, 105 Third relay, 106 Fourth relay, 107 M coil, 108 S coil, 109 Capacitor, 200 DC circuit, 201 Second control circuit, 202 Fifth relay, 202a First connection destination, 202b Second connection destination, 203 Sixth relay, 203a Third connection destination, 203b Fourth connection destination 。

Claims

1. A fan motor; a control unit that rotates the fan motor in a first rotation direction and a second rotation direction different from the first rotation direction; a fan provided in the fan motor, the fan generating an airflow in a first airflow direction when the fan motor rotates in the first rotation direction, and generating an airflow in a second airflow direction different from the first airflow direction when the fan motor rotates in a second rotation direction; Equipped with A blower which extends the time that the fan motor rotates in the second rotation direction as the number of rotations of the fan motor in the first rotation direction per unit time decreases after the fan motor rotates in the first rotation direction.

2. A vertical oscillating motor is provided for rotating the fan motor and the fan in a vertical direction, The blower according to claim 1 , wherein the cleaning operation is performed by rotating the fan in the second rotation direction with the up-down oscillating motor while facing the fan in a direction having a vertical vector.

3. 3. The blower according to claim 1, wherein the fan motor is an AC motor.

4. 3. The blower according to claim 1, wherein the fan motor is a DC motor.

5. The blower according to claim 1 , further comprising an operation unit capable of switching between a state in which the fan motor rotates in the first rotation direction and a state in which the fan motor rotates in the second rotation direction.

6. The blower according to claim 1 , further comprising a right-left oscillating motor for rotating the fan motor and the fan in a direction perpendicular to the vertical direction.

7. The blower according to claim 1 , further comprising a control unit that causes the fan motor to rotate in the second rotation direction for a predetermined time after the fan motor has rotated in the first rotation direction.

8. 8. A blower as claimed in any one of claims 1 to 7, wherein after the fan motor rotates in the first rotation direction, the number of rotations per unit time of the fan motor when rotating in the second rotation direction is made greater than the number of rotations per unit time of the fan motor in the first rotation direction.

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