JPH0674190A - Fan - Google Patents

Abstract

PURPOSE:To embody drive control of a fan by DC and smoothly perform operation selecting control and electric motor control with high efficiency by providing a DC brushless motor for driving a fan blade, a motor power source unit and the like for supplying a current to the motor. CONSTITUTION:An electric circuit is provided with a drive circuit unit 25 for a DC brushless motor 11; a variable voltage control unit 26 for supplying a current to the DC brushless motor 11 via the drive circuit unit 25; a rectifier circuit 4 for supplying a current to the variable voltage control unit 26; and an operation selecting control unit 27 for sending a variable voltage control signal to the variable voltage control unit 26. A motor power source unit and an electric power controller is composed of the variable voltage controller 26. Consequently, adoption of the DC brushless motor 11 and a DC motor for a fan blade driving electric motor and a wind orientation varying motor, respectively, can enhance startability at a low speed. Furthermore, it is possible to achieve miniaturization and perform both operation selecting control and electric motor control of the fan DC.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower equipped with a wind direction changing motor for changing the blow direction.

[0002]

2. Description of the Related Art In a conventional blower, a synchronous motor drives a blower blade and a synchronous motor changes a blowing direction, and is driven by an alternating current. But,
In order to improve controllability, alternating current cannot be sufficient, and the rotational speeds of the blower blade driving electric motor and the wind direction changing motor change due to the difference between 50 and 60 Hz depending on the alternating current power source.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a blower capable of improving the controllability of a fan.

[0004]

The present invention is directed to a DC brushless motor for driving a blower blade, a drive circuit section for the DC brushless motor, and a motor power source section for supplying power to the DC brushless motor via the drive circuit section. A rectifying circuit unit for supplying power to the motor power supply unit, an operation selection control unit for performing operation control of the DC brushless motor, and a motor power supply for supplying power to the DC brushless motor according to a control signal from the operation selection control unit. A power control unit for controlling the power supplied from the unit, and drive control by a control signal of the operation selection control unit,
The present invention is characterized by a configuration including a DC motor for changing the wind direction that changes the blowing direction.

[0005]

By adopting a DC brushless motor as an electric motor for driving the blower blade and a DC motor as a motor for changing the wind direction, the startability at low speed is improved and the size is reduced, and the operation selection control of the blower and the electric motor. The control can be entirely performed by direct current and can be controlled by a low voltage, so that the efficiency of the blower can be improved, that is, the power can be saved, and the insulation process can be simplified. Further, both motors can be controlled in synchronization with each other, so that the user does not feel uncomfortable.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described in detail below based on the fan shown in FIGS.

The electric fan 30 is composed of a stand 31 including a base 32 and columns 33, and a fan main body 34 supported by the stand 31.

The fan main body 34 includes an axial-flow type blower blade 36 having a cup-shaped boss portion 35, a DC brushless motor 11 housed in the boss portion 35, and the DC brushless motor 11
Rear guard body 39 to be mounted on the mounting portion 38 of the
A front guard body 40 to be mounted on, a support body 41 extending rearward from the attachment portion 38, a cover body 44 covering the attachment portion 38 and the rear surface side of the support body 41, and a rear portion of the support body 41. The swing motor 2 is mounted on the upper surface and serves as a wind direction changing motor that changes the direction of the fan main body 34 with respect to the stand 31 to change the air blowing direction.

A front portion of the support body 41 is rotatably supported by a support shaft 42 projecting from the upper portion of the support column 33. A cam body 61 is attached to the output shaft 60 of the swing motor 2, and the cam body 61 and the column
33 and 33 are connected by a link body 62. Therefore, when the swing motor 2 is driven, the fan main body 34 swings left and right about the support shaft 42. In this embodiment, mainly fan
34 is directly supported by the column 33 by the support shaft 42,
The support piece 42 may be supported on the neck piece, and then the neck piece may be supported on the tip portion of the support column 33 so that the elevation angle can be adjusted freely.

In the DC brushless motor 11, the mounting portion 38 is formed of a disk, and an inner stator 46 having a winding on the outer periphery of a cylindrical body 45 protruding in the center thereof is fitted and supported. The cylinder
A rotation shaft 47 is supported by the insertion shaft 45, and a cup-shaped outer rotor 48 is fixed to the protruding end of the rotation shaft 47. The outer rotor 48 includes a rotary plate body 49, a yoke 50 mounted around the rotary plate body 49 and serving as a casing, and a permanent magnet body 51 mounted on the inner surface of the yoke 50. And more. A screw portion 53 into which the spinner 52 is screwed is formed at the tip of the rotary shaft 47, and the rotary plate body 49 and the boss portion 35 of the blower blade 36 are connected to each other so that they cannot rotate. The yoke 50 is formed so as to cover the permanent magnet body 51.

Next, description will be given based on the electric circuit block diagram shown in FIG.

The electric circuit is the DC brushless motor 11
Drive circuit section 25, a variable voltage control section 26 for supplying power to the DC brushless motor 11 via the drive circuit section 25, a rectifying circuit section 4 for supplying power to the variable voltage control section 26, and the variable voltage control section 26. And an operation selection control unit 27 that sends a variable voltage control signal to the. In this embodiment, the motor power supply section and the power control section are formed by the variable voltage control section 26. The commercial power supply 1 is connected to the rectifier circuit 4 via a filter circuit 3. The filter circuit 3 is for removing noise generated from the DC brushless motor 11 and the like, is composed of a coil and a capacitor, and is further connected to a varistor for circuit protection from a surge voltage such as lightning strike.

The variable voltage control section 26 oscillates a chopper for oscillating a frequency set to 20 kHz or higher, which is not perceptible to human hearing, a variable voltage control signal from the operation selection section 27, and an oscillation circuit 8. A first voltage control circuit 6 for controlling the chopper width by a signal from the first voltage control circuit 6, and a second voltage control circuit 7 serving as an amplifier of the first voltage control circuit 6.
The smoothing circuit 9 smoothes the chopper waveform voltage of the DC voltage controlled by the second voltage control circuit 7. The oscillation circuit 8, the first voltage control circuit 6, the second voltage control circuit 7 and the smoothing circuit 9 are formed by connecting circuit components such as a comparator, a transistor and a resistor.

A first constant voltage circuit 5 for generating a DC constant voltage for operating the variable voltage control unit 26 is formed in the subsequent stage of the rectification circuit unit 4 and is formed by a Zener diode, a capacitor and a resistor. There is. The first constant voltage circuit 5 serves as a drive power source for the DC swing motor 2 described later.

The output of the rectifying circuit section 4 is 100 V on average.
Then, the peak value is a direct current of about 141V, chopper control is performed by the second voltage control circuit 7, a sawtooth wave electromotive force of 1 / 2LI ² t is generated in the coil of the smoothing circuit 9, and the electromotive force is generated by the capacitor. The DC brushless motor 11 is smoothed and supplied with electric power. The DC brushless motor 11
The voltage supplied to the DC brushless motor 11 is controlled from about 5V to 40V, and the DC brushless motor 11 is controlled from 300V to 15V.
It is controlled up to 00 rotations.

The drive circuit section 25 includes an electric motor control section 19 formed by a microcomputer and the electric motor control section 19
The position of the drive / amplification circuit 22 that controls the power supply to the winding to the DC brushless motor 11 and the position of the permanent magnet body 51 of the rotor 48 of the DC brushless motor 11 are detected by the control signal from the motor controller 19. And a rotation abnormality detection circuit 24 for detecting an abnormal rotation of the DC brushless motor 11. The microcomputer used in the electric motor control section 19 is a 4-bit 1-chip microcomputer L manufactured by Tokyo Sanyo Electric Co., Ltd. in this embodiment.
M6417E is used.

The drive / amplification circuit 22 is formed by connecting a transistor or the like so as to switch the power supply to each winding to the DC brushless motor 11, and a three-phase bipolar system is used as a drive system, but it is not particularly limited. However, a three-phase unipolar system may be used, and the conventionally known D
Any C brushless motor drive circuit and drive system can be used.

The rotation abnormality detecting circuit 24 is formed of a comparator and a resistor, and detects a change in current to detect a rotation abnormality such as locking of the DC brushless motor 11 to stop the DC brushless motor 11. I have to.

The conduction angle selection unit 20 is connected to the motor control unit 19 and is appropriately selected to select the conduction angle of the DC brushless motor 11, and the signal is 1 in 2 bits.
20 degrees, 150 degrees, 155 degrees, and 160 degrees can be selected, and the overlapping conduction angles of the windings are 0 degrees, 30 degrees, 35 degrees, and 4 degrees.
The DC brushless motor is configured to be 0 degree, and vibration and electromagnetic noise of the DC brushless motor can be reduced by selecting the conduction angle of the DC brushless motor.

A forward / reverse rotation mode selection unit 21 is connected to the electric motor control unit 19 as an input. In this embodiment, a resistor is connected for exclusive use of normal rotation, but it may be switched to normal rotation and reverse rotation by connecting via a switch body.

The operation selection control section 27 includes a driving function control section 12 formed by a microcomputer, a driving selection section 13 for inputting a selection signal to the driving function control section 12, and a selected state by the harmful driving selection section 13. A display unit 15, a voice output unit 14 for notifying by sound that the operation selection unit 13 has been operated, and a swing motor drive circuit 16 for stopping and controlling the DC swing motor 2 driven by DC. Is equipped with.

In the present embodiment, the microcomputer used in the operation function controller 12 is a 4-bit 1-chip microcomputer LM manufactured by Tokyo Sanyo Electric Co., Ltd.
6416E is used. The operation selection unit 13 is formed by a switch, the display unit 15 is formed by a light emitting element such as an LED, and the voice output unit 14 is formed by a buzzer or the like.

The operation selecting unit 13 can select various functions of a conventional fan. For example, the speed control of the DC brushless motor 11, the operation time control of 1, 2, and 3 hours, the operation time control, and the sequential rotation speed can be selected. Can be performed in various ways, such as a good night time control in which the temperature decreases, a natural wind control in which the speed of the DC brushless motor 11 sequentially changes from high to low, and from low to high. The control selected by the operation selection unit 13 is discriminated by the operation function control unit 12, and the variable voltage control unit
It is inputted to the first voltage control circuit 6 of 26, and the rotation of the DC brushless motor 11 is controlled.

A variable voltage control unit is provided at a stage subsequent to the rectifying circuit unit 4.
A second constant voltage circuit 10 is formed at a subsequent stage portion of 26, and the second constant voltage circuit 10 drives a microcomputer which forms an electric motor control unit 19 and a driving function control unit 12. The motor control unit 19 and the driving function control unit 12 include a reference clock circuit 17
And the reset circuit 18 are connected. The reference clock circuit
No. 17 oscillates at 800 KHz in this embodiment. Although the reference clock circuit 17 and the reset circuit 18 are shared in this embodiment, the motor control unit 19 and the operation function unit 12
If and are built into another substrate, they are required here.

By rotating the blower blades 36 by the DC brushless motor 11, it is possible to achieve downsizing which was difficult with the conventional induction motor, and it is possible to rotate the blowers 36 at a very low speed with good maneuverability. Further, by changing the rectifying circuit unit 4, it is possible to cope with the voltage of the whole world, and the rotation speed does not change even if the frequency of the commercial power source 1 changes to 60 Hz or 50 Hz, for example.

In the present embodiment, the Hall IC is incorporated in the disc-shaped substrate 71 to form the position detection circuit 23, and the disc-shaped substrate 71 is fitted and mounted in the cylindrical body 45 of the mounting portion 38. Circuit elements other than the position detection circuit 23 are incorporated in the substrate 72 and are a base.
It is decorated in 32. The disk-shaped substrate 71 and the substrate 72 are connected by a lead wire 73. By incorporating the circuit elements other than the position detection circuit 23 in the substrate 72 incorporated in the base 32,
It is easy to check the electric circuit after assembly, and it is not easily affected because it is located away from the DC brushless motor 11, which is a noise source that causes a malfunction.

A DC input connector section 28 is formed at the subsequent stage of the rectifying circuit section 4 so that the fan 30 can be driven by a vehicle-mounted storage battery or an external DC power source.

The first embodiment described above is a DC brushless motor.
The rotation speed was controlled by changing the voltage value of the electric power supplied to 11 and always energizing for the energizing time. The electric fan of the second embodiment shown in the electric circuit of FIG. , The power supplied to the DC brushless motor 11 is changed to change the supplied power.

The motor power source unit 65 formed by the oscillator circuit 8, the second voltage control circuit 7, and the smoothing circuit 9 always keeps the electric power of the genetic pressure in the driving / amplifying circuit 22 of the DC brushless motor 11.
Power. The chopper control circuit 66 controls the switching of the energization to each winding of the driving / amplifying circuit 22 and the energizing time. Therefore, the chopper control circuit 66 serves as a power control unit. The chopper control circuit 66 is controlled by the control signal of the operation selection control unit 27. On-duty 1 by the chopper control circuit 66
At the time of the control of 00%, the circuit operation becomes the same as that of the above-mentioned first embodiment, and the rotation speed is the highest. Therefore, in this embodiment, since the supply voltage of 38V is required to rotate the DC brushless motor 11 by 1430, the output voltage from the motor power supply unit 65 is set to 38V. However, the set voltage can be variously changed in terms of the maximum speed and operating efficiency of the fan.

In this embodiment, DC is controlled by so-called chopper control.
It is one embodiment for controlling the speed of the brushless motor 11,
The chopper control circuit 65 may always be controlled at 100% on-duty, and may perform chopper control on the output voltage from the motor power supply unit 65. In this case, the motor power supply unit 65 also serves as the power control unit.

Also in this embodiment, the swing motor 2 is a DC motor, and the operation control of the fan 30 is entirely DC. A speed may be controlled by using a DC brushless motor for the swing motor 2, and may be controlled in conjunction with the level of the blown air. For example, it is possible to prevent the user from feeling uncomfortable by increasing the swing speed at a low blow rate compared to the swing speed at a high blow rate and a high blow rate.

The present invention is not limited to the various embodiments described above, and various structures and circuit structures of the respective components can be considered within the scope of the invention.

[0033]

As described above, according to the present invention, the blower can be driven and controlled by direct current, the operation selection control and the motor control can be smoothly and efficiently performed, and the insulation treatment by the low voltage can be performed. In addition to simplification, it is possible to reduce the discomfort of the user by synchronizing the blower DC brushless motor and the wind direction changing DC motor to change the wind direction according to the blown air volume. Produce an effect.

[Brief description of drawings]

FIG. 1 is a side view, partly in section, of a first embodiment of the present invention.

FIG. 2 is a block diagram of the electric circuit.

FIG. 3 is an electric circuit block diagram of a second embodiment of the present invention.

[Explanation of symbols]

 2 DC motor for changing the wind direction (oscillation motor) 4 Rectification circuit section 11 DC brushless motor 25 Drive circuit section 26 Variable voltage control section 27 Operation selection control section 31 Stand 34 Mainly fan 36 Blower blade 65 Motor power supply section 66 Chopper control circuit

Claims (1)

[Claims] 1. A DC brushless motor for driving a blower blade, a drive circuit section for the DC brushless motor, a motor power supply section for supplying power to the DC brushless motor via the drive circuit section, and a power supply for the motor power supply section. Control circuit for controlling the operation of the DC brushless motor, and the power supply power from the motor power supply section that supplies power to the DC brushless motor according to a control signal from the operation selection control section. A blower comprising a power control unit and a wind direction changing DC motor that is drive-controlled by a control signal from the operation selection control unit and that changes the air blowing direction.