JPS61280787A - Fan - Google Patents

Abstract

PURPOSE:To make it possible to readily control variously a fan by controlling a DC brushless motor to control the rotating speed of blower blades, thereby improving the starting characteristic at low speed time to stabilize the low speed rotation. CONSTITUTION:A rectifier 4 is connected through a filter 3 with a commercial power source 1 to supply a variable voltage controller 26. The controller 26 energized a motor 11 through a drive circuit 25. A fan operation selective controller 27 feeds a variable voltage control signal to the controller 26 to control the operation of the motor 11.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an electric fan that is used to provide a cool feeling in the summer, and used for circulation to improve thermal efficiency in the winter.

(1) Prior Art Techniques prior to the present invention include Japanese Utility Model Publication No. 39-19698 and Japanese Utility Model Publication No. 39-26092.

There is an electric fan using an epidermal induction motor disclosed in Japanese Utility Model Publication No. 43-19010 and the like. In addition to electric fans, induction motors have conventionally been commonly used as electric motors for driving blower blades.

There is a limit to setting the rotational speed to the low speed side due to a decrease in starting torque. Therefore, a startup compensation circuit is required to rotate the motor at high speed at startup and then set it to low speed. (For example, there are Utility Model Publication No. 50-35362, Utility Model Publication No. 50-46164, etc.) In addition, as shown in the above-mentioned publication, an external rotor type There are some that use induction electric motor 81 (especially often used in ceiling fans). @The outer diameter of the machine was large, and the boss was larger than the outer diameter of the blower blade, resulting in poor air blowing efficiency.

Furthermore, most conventional electric fans used switches and timers to mechanically open and close contacts to control speed and time, but soft switches were used to improve operability. In order to improve the precision of time control, electronic circuit control such as a digital timer had to be used. In addition, unless the induction motor has a structure that matches the frequency of the applied voltage, stable rotation suitable for use as an electric fan cannot be obtained. Conventionally, the structure has been changed depending on the region of use, which increases the number of parts and increases the efficiency of part management and production management. It was bad. Another drawback of induction motors was poor motor efficiency.

(c) Problems to be Solved by the Invention The present invention aims to reduce the size of the electric motor that drives the blower blades of an electric fan, improve startup at low speeds, improve controllability, and improve motor efficiency.

B) Means for Solving the Problems The present invention provides an electric fan having a blower blade, a guard body covering the blower blade, and a DC brushless motor for driving the blower blade, and a stand for supporting the electric fan. Said D
a drive circuit section for the C brushless motor; a motor power supply section that supplies power to the DC planless motor via the drive circuit section; a rectifier circuit section that supplies power to the motor power supply section;
A fan operation selection control section that controls the operation of the brushless motor, and a power control section that controls the power supplied from the motor power supply section to the supplementary DC brushless motor using a control signal from the fan operation selection control section. υ, and the problem is solved by controlling the power applied to the DC brushless motor by changing the DC voltage value, changing the application time, or a combination thereof. be.

(E) Function By using a DC brushless motor as the electric motor, the present invention improves starting performance at low speeds and achieves miniaturization.Fan operation selection control and electric motor control can be processed with direct current, and low voltage is achieved. By doing so, it is possible to improve the efficiency of the electric fan, that is, to save power, and to simplify the insulation process.

(f) Example The present invention will be explained based on each illustrated embodiment.

1 to 7 show a first embodiment of the present invention,
Figure 1 is a right side view of the electric fan (to), partially cut away, and Figure 2 is the base C33 of stand C31) and the support (to).
FIG. 3 is an enlarged partial cross-sectional side view of the fan body (b) and the upper part of the support, FIG. 4 is an electric circuit block diagram, and FIG. 5 is an electric circuit diagram.

FIG. 6 is a side sectional view of the packaged state. FIG. 7 is a plan sectional view of the packaged state.

The electric fan body (B) has a cup-shaped boss part (G) between the axial flow type blower blades, and a part D that is housed in the boss part (to).
A planless motor (11) and a rear guard body ClI &
The front guard body (11) to be attached to the rear guard body, the support body αυ to be attached to the attachment part (to), and the support body tA
It has a neckpiece α2 on which the υ is attached, and a bifurcated part that supports the neckpiece so that the angle of elevation can be adjusted, and is mechanically and electrically connected to the tip of the support column so as to be separable. The intermediate connecting body (43) includes a cover integral circle that covers the support body (41J) at the center rear of the rear guard body (IG).

As shown in FIG. 3, the DC brushless motor 11) has the mounting portion formed of a disk, and an inner stator 461 having a cylindrical body (with a wire wound around the outer circumference) protruding from the center thereof. A rotating shaft (47) is inserted into and supported by the four cylinder bodies, and a cup-shaped outer rotor frame is fixed to the projecting end of the outer rotor (419). Body (49 and.

The yoke 5G, which also serves as a casing, is attached around the rotary plate body (C), and the permanent magnet body (51) is attached to the inner surface of the yoke 61. A threaded portion (53) into which a spinner (52) is screwed is formed at the tip of the rotating shaft, and the rotating plate body (49) and the boss portion (G) of the blower blade ((4)) rotate relative to each other. Impossibly connected.

The yoke ω is formed to have a size that covers the permanent magnet (51), and the boss portion G9 is formed to be close to between the mounting portions.

As shown in FIG. 2, the base C321 and the support are connected mechanically and electrically so that they can be freely divided. A recess (55) is formed in the base Gz, into which the lower part of the support column is inserted;
A first connector (56)'e screw (57) is attached to the bottom of the connector. The recess (55) is provided at the bottom of the support column.
a cap body (58) having dimensions to be inserted and fitted into the cap body;
A reinforcing body (59) is inserted into the lower inner surface, and the three parts are integrally fixed with screws (60). The first connector (5
The second connector (61) connected to the second connector (61) is mounted by being held between the cap body (58) and the reinforcing body (59). A screw hole (62) is formed in the reinforcing body (59), and an insertion portion (63) for screwing into the screw hole (62) is formed at the bottom of the cap body (58) and the recess (55). 64
) (65) is formed. By screwing the screw (63) into the screw hole (62), the support (to) is inserted into the recess g.
(The cap body (58) and the concave portion (5B) are formed to be thinner toward the front and back, and the wedge action is used to ensure smooth fitting. It is designed so that it can be carried out easily and reliably.

Since the electric fan (2) can be divided into the base 03, the support and the fan body (2), they are packed as shown in FIGS. 6 and 7. The packaging device consists of a pair of cushioning bodies (66) molded from foamed resin and an exterior body (67) made of corrugated paper. Recesses (68), (69), and (70) are formed on the opposing surface of the buffer body (66) to fit and hold the base C33, the support column, and the end of the electric fan body (34). stand CI3
and pillars c13 are lined up, and the electric fan body (b) is positioned so as to overlap them. The dimensions of the base C33 in the front and back direction and the length of the support column are determined by the electric fan body (goods).
(the diameter of the front and rear guard bodies C39 (41)), and the lateral dimension of the base C33 is increased by approximately twice the width of the support body to form the fan body (diameter of the front and rear guard bodies C39). )
By forming the outer diameter so that it has an outer diameter of , the packaging size is reduced. Since the electric fan body (B) does not protrude rearward as much as in conventional electric fans, the front guard body (4)
1, the rear guard body C39, and the blower blade (to) can be packed into a small size without disassembling them.

Next, the electric circuit will be explained based on FIGS. 4 and 5.

As shown in FIG. 4, the electric circuit includes a drive circuit section (to) for the DC brushless motor (lυ), and a variable voltage control section for supplying power to the DC brushless motor (111) through the drive circuit section (c). , a rectifier circuit section (4) that supplies power to the variable voltage control section (4), and a fan operation selection control section (cl?) that sends a variable voltage control signal to the variable voltage control section.In this embodiment, The motor power supply section and the power control section are formed by the variable voltage control section (a).The rectifier circuit (4) is connected to the commercial power supply (through the filter circuit (3)).
1) is connected. The filter circuit (3) is the D
This is to remove the noise Wk generated from the C planless motor σD, etc., and specifically consists of a coil and a capacitor as shown in Figure 85.

Furthermore, a varistor is connected to protect the circuit from voltage surges caused by lightning strikes, etc. The variable voltage control section (to).

An oscillation circuit (8) for the chopper that oscillates at a frequency set to 20 KHz or higher that is imperceptible to human hearing, a variable voltage control signal from the fan operation selection control section (c), and a variable voltage control signal from the oscillation circuit (8). and a first voltage control circuit (6) for controlling the width of the signal.

a second voltage control circuit (7) which serves as an intensifying part of the first voltage control circuit (6); It consists of a circuit (9).The oscillation circuit (8) and '!!&1
Specifically, the voltage control circuit (6), the second voltage control circuit (7), and the smoothing circuit (9) are '! J! As shown in Figure J”5,
It is formed by connecting circuit components such as a comparator, a transistor, and a resistor. A first constant voltage circuit (5) that generates a constant DC voltage for fully operating the variable voltage control section is formed at a subsequent stage of the rectifier circuit section (4), and is specifically a Zener circuit as shown in FIG. It is made up of a diode, capacitor, and resistor. The output of the rectifier circuit section (4) is 100v on average
It is a direct current with a peak value of about 141V, is chopper-controlled by the second voltage control circuit (7), and is subjected to chopper control by the smoothing circuit (9).
A sawtooth wave-like electromotive force of %LIt is generated in the coil of ), and the electromotive force is smoothed by a capacitor to supply power to the DC brushless motor (1B).The voltage supplied to the DC brushless motor (111) is Approximately 5v to 40
At the same time, the DC brushless motor σD is controlled from 300 to 1500 rotations.

The drive circuit section [with] includes a motor control section 1!1 formed by a microcomputer, and a control signal from the motor control section (II) to control the DC brushless motor ll111.
of the drive/amplifier circuit that controls the power supply to the windings.

The position of the rotor (4F3 permanent magnet body (51)) of the DC brushless motor συ is detected, and the motor control unit α1
It consists of a position detection circuit (c) that inputs input to the motor, and a rotation abnormality detection circuit (b) that detects abnormal rotation of the DC brushless motor (ill). In the example, a 4-bit, 1-chip microcomputer Lu6417Eft manufactured by Tokyo Sanyo Electric Co., Ltd. is used.

The drive/amplifier circuit @ is formed by connecting transistors, etc. as shown in FIG. It may be a unipolar system, and the conventionally known D
Any C brushless motor and drive method can be used. The position detection circuit area is formed in the hall IO. The rotation abnormality detection circuit (24 is formed of a comparator, a resistor, etc. as shown in FIG. 5, and detects a change in current to detect rotation abnormality such as locking of the DCC planless motor υ, The DC planless motor cL11 is stopped.The electric motor control section (L'J) is connected as an input to the conduction angle selection section (■), and by making an appropriate selection, the D
The conduction angle of the C brushless motor is selected, and the signal is 120 degrees, 150 degrees, 155 degrees, 16 degrees with 2 bits.
Can be selected to 0 degrees, and the conduction angle between the windings that overlap each other is 0 degrees,
The angles are 50 degrees, 35 degrees, and 40 degrees.

By selecting the conduction angle, vibration and electromagnetic noise of the DC brushless motor can be reduced. A forward/reverse mode selection section is connected as an input to the motor control section (19). In the present embodiment, a resistor is connected as shown in Fig. 5 for exclusive use of forward rotation. Therefore, it may be possible to switch between forward rotation and reverse rotation.

The electric fan operation selection control section C27) includes an operation function control section (121) formed by a microcomputer, and an operation selection section (13) that inputs a selection signal to the operation function control section 0.
and a display section (15) indicating the selection state by the operation selection section G31.
1, an audio output unit I that notifies by sound that the operation selection unit (131) has been operated, and a swing motor drive circuit unit that controls the stop of the swing motor (2) shown in the embodiment described later. In this embodiment, the microcomputer used in the operation function control unit u7J is a 4-bit 1-chip microcomputer L manufactured by Tokyo Sanyo Electric Co., Ltd.
M6416E is used. The operation selection section C131 is formed by a switch.

The display section 09 is formed of a light emitting element such as an LED, and the audio output section (141 is formed of a buzzer or the like).

The operation selection section α3 allows selection of various functions that conventional electric fans have.1 For example, speed control of the DC brushless motor αD, 1-, 2-, and 3-hour operation time control, and sequential rotation speed control in conjunction with operation time control. Various types of control can be performed, such as bedtime control in which the speed of the DC brushless motor (111) is lowered, natural wind control in which the speed of the DC brushless motor (111) is sequentially changed from high to low, and from low to high. The control is determined by the driving function control unit α and inputted to the first voltage control circuit (6) of the variable voltage control unit (2e), and the rotation of the DC brushless motor σD is controlled.

A second constant voltage circuit H is formed in a downstream part of the variable voltage control section at a stage subsequent to the rectifier circuit section (4), and the second constant voltage circuit H is connected to the motor control section (19 and the driving machine). A microcomputer is driven to form the ml control unit σ discharge.A reference clock circuit αη and a reset circuit (1B) are connected to the motor control unit 9 and the operation function control unit r17J.

The reference clock circuit α is 800K in this embodiment.
It oscillates at Hz. Although the reference Glock circuit αη and the reset circuit α♂ are used in common in this embodiment, they are required individually when the motor control unit a9 and the operation function unit σ2 are installed on separate boards.

By driving the rotation of the blowing blades using a DC motor 3, it is possible to achieve a reduction in size, which was difficult to achieve with a conventional rust conduction motor, and it is possible to rotate at an extremely low speed with good start-up performance. In addition, by connecting the rectifier circuit section (4)'t U, it is possible to cope with voltages from all over the world, and also the commercial power supply (
Even if the frequency 1) changes to, for example, 60Hz or 50H4, the number of revolutions does not change.

In this embodiment, there are holes LOi in 9 disc-shaped substrates (71).
Incorporate the position detection circuit (23).

The disk-shaped substrate (71) is attached to the cylindrical body (4G) of the mounting portion (to).
It is inserted and installed. The disk-shaped substrate (71) is covered by the boss portion C3S when the blower blade (to) is attached to the outer rotor (48).Circuit elements other than the position detection circuit are the substrate (72). The base C3 is incorporated into the base C3.
It is installed in a. The disk-shaped substrate (71) and the substrate (72
) is connected with a lead wire (73). By incorporating circuit elements other than the position detection circuit into the board (72) incorporated into the base C3, it is possible to easily check the electric circuit after assembly, and it is also possible to eliminate noise sources that may cause malfunctions. Since it is located far away from a certain DC brush motor σD, it is not easily affected.

Next, a plurality of other embodiments of the present invention will be described. Regarding the explanation of the other embodiments, the explanation of the embodiment 't51 will be used as a basis, and all the differences will be explained based on the first embodiment. Indicated by code.

FIG. 8 shows a main circuit in a second embodiment of the present invention. In this embodiment, the first constant voltage circuit (5) and the $2 constant voltage circuit σ1, which were formed separately in the first embodiment, are formed by a single constant voltage circuit □□□. The constant voltage circuit Qa has a transformer connected in parallel with a part of the filter circuit (3) as a main circuit component.

After the voltage is lowered, it is rectified to make it a constant voltage. Specifically, as shown in FIG. 8, it is formed of a diode, a transistor, etc. The constant voltage circuit 128) drives the comparator of the variable voltage control section, the microcomputer of the drive circuit section (c), and the fan operation selection control section (27). Note that the swing motor drive circuit section and the swing motor (2) incorporated in the circuit shown in FIG. 8 are related to the embodiments described later, and their explanation will be omitted.

FIG. 9 is an enlarged sectional view of a main part showing a third embodiment of the present invention. In this embodiment, a drive circuit section (3) is mounted on a disk-shaped substrate (74).
, a variable voltage control section (a), a first constant voltage circuit (5), etc., are installed on the rod section (45), and a fan operation selection control section □□□, a rectifier circuit section (4), and a filter circuit ( 3) etc. is incorporated into the base. Therefore, the reference clock circuit section and the reset circuit αa are formed separately. The disk-shaped substrate (74) is equipped with a DCt planless motor (the circuit part that generates heat by repeating conduction and non-conduction during 1υ rotation), so that air circulates around it and indirectly generates heat. In order to cool the disc-shaped substrate (74) more forcefully, cooling is applied to the outer rotor (rotating plate l) and the blower blade (boss C39). A ventilation hole may be formed to accommodate the action of a fan.Also, in this embodiment, the outer rotor (I & Yoke@) is extended rearward and the disk-shaped substrate (7) is formed.
4), the yoke has a shielding effect that protects the D(3 bookless motor)
Also, noise generated from the circuit portion of the disc-shaped substrate (74) can be reduced. Furthermore, the yoke 15G
By extending the length, it is possible to increase the contact area of the blower blade with the boss G, thereby reducing the deflection of the blower blade. The fan operation selection control section is completely separated and incorporated into the board, but it is strange that the output from the fan operation selection control section c'0 is actually sent to the first voltage control circuit (6). Therefore, the electric fan living body 1
．． Lead wire (7) wired between 30 and stand C311
3) 'e can be reduced.

FIG. 10 is a partially sectional side view showing a fourth embodiment of the present invention. In this embodiment, the mounting portion (c) and support body (411) in the first embodiment are integrally formed to form a single support base (75).
)'e The aim is to reduce the number of shadow forming parts, improve ease of assembly, and stabilize support. Further, the supporting base (75)
The position detection circuit c! Disc-shaped substrate incorporating 31 (7
1) Cover the area around the air blower c! I)C when a is removed
Cylindrical body that prevents dirt from entering the planless motor αυ (
89).

The board (76) incorporating the drive circuit section r29, the variable voltage control section 4, the first constant voltage circuit (5), etc. is integrated with a cover (
It is fixed to a support base (75) covered by 14J.

The base R3 and the pillar (to) are molded as one piece. A board (77) incorporating the electric fan operation selection control section (5), the rectifier circuit section (4), the filter circuit (3), etc. is installed in the base. The effect of the above circuit configuration is ′
This is the same as the 7s3 embodiment. However, the substrate (76) is
By arranging it outside the C brushless motor αD, it is possible to separate repair and assembly processes, and to share the DC planless motor with other electrical equipment.

Figure 11 is a sectional side view showing a fifth embodiment of the present invention. In this embodiment, a board box (78) is fixed to the center of the rear face of the rear guard body (3rd stage) as a member replacing the support member Qυ in the first embodiment, and the board box (78) is attached to the top of the pillar (to) with a neck. The board box (78) is equipped with a board (79) that incorporates a circuit excluding a position detection circuit and a fan operation selection control unit @. be done.

The board incorporating the electric fan operation selection control unit is housed in an operation box (80), and the operation box (80) is connected to the rear guard body c.
It is fixed to the upper part of 31. The operation box (80) is fixed to the rear guard body C3'J.

It also acts as a connecting body with the front guard body f4G.

FIG. 12 is a cross-sectional side view showing the 'i@6 embodiment of the present invention. This embodiment is a board box (78)' in the fifth embodiment.
Used only as a ThTh support function, the substrate (79) t-
It is housed in a separate box body (81) and fixed to the front part of the support column of the rear guard body C31.

Therefore, by arranging the air blowing blade C in front of the support column where the air flow is less likely to be blocked, the substrate (79) can be efficiently cooled without reducing the air blowing efficiency. Further, the operation box (80) is also used as the base 021.

13 to 15 show a seventh embodiment of the present invention, in which FIG. 13 is a side view, FIG. 14 is a sectional view of main parts, and FIG.
The figure is a perspective view of the neck piece (43).The present embodiment includes the board box (78) in the fifth embodiment and the board (79) inside the box body (81) in the sixth embodiment. The base plate (79) is fixed to the mounting portion (82) formed in the neck piece (4) with screws (83).In this embodiment, the mounting portion ( 82) is formed at the flange.The upper surface opening of the neck piece (42) is closed by a support base (75) which integrally forms the attachment part example and the support body (41) in the first embodiment. The board (79) can be installed into the neck piece (4) by inserting it into a groove formed vertically on the inner surface and holding the board (79) with the support base (75). Good.Also, the board (79) can be divided into a plurality of parts, upper and lower,
Store them side by side.

The neck piece (421) may be made smaller.Furthermore, the connection between the divided boards can be made using a flexible strip cord to facilitate assembly.The support base (75) is integrated with the cover (421). 44. At the bottom of the neckpiece (6) there is a bifurcated part (8).
4) Th is formed, and the forked portion (84) is pivotally supported by a pivot (85) so as to pass over the upper part of the column. Fan operation selection control section (27)'f: The incorporated board is installed inside the base plate.

FIG. 16 is a sectional view of a main part showing an eighth embodiment of the present invention. In this embodiment, in the seventh embodiment, a board (86) incorporating a fan operation selection control unit installed inside the base 0 is fixed to a cover (44).

FIG. 17 is a side view showing a ninth embodiment of the present invention. In the fourth embodiment shown in FIG. 10, the lead wire (73)
)k.

In this embodiment, control signals are transmitted using a medium such as radio waves or infrared rays. A remote controller incorporating at least an operation function control unit (13) and an operation selection unit (131) of the electric fan operation selection control unit, and a conversion circuit and a transmission unit that converts a control signal to the first voltage control circuit (6) into a transmission signal. The box (87) is detachable from the base plate.A receiving section (88)' is formed at the bottom of the rear guard Gl, and a conversion circuit is incorporated in the board installed in the board box (78). It is designed so that it can be controlled remotely.

Figures 18 and 19 show a $10 embodiment of the present invention. FIG. 18 is an enlarged sectional view of the main part, and FIG. 19 is a side view. In each of the embodiments described above, the DC brushless motor 11υ was mounted at the center of the rear guard body (4), but in this embodiment, the front guard body (4 (1) central ornament (9
0). The front guard body lrj
A support body (4υ) is fixed to the center of the support body (4υ), and a mounting part (to) with a cylinder (c) protruding from the support body (4υ) is fixed. (41 is fitted and supported. On the outer periphery of the base end of the cylinder (490) there is a disk-shaped substrate (71) in which a position detection circuit is incorporated, a drive circuit section (c), and a variable voltage control section (1). and a board (76) incorporating a first constant voltage circuit (5i etc.).
71) and (76) are covered with a cylindrical cover (91).

The integrated cover (91) is made of a conductive material, and the heat sink of the transistor (92) is fixed to the integrated cover (91), thereby allowing the transistor (92) to efficiently dissipate heat. . Further, the integrated cover (91) also serves to shield noise generated from the substrates (71) and (76). The ornament (90) is attached to the center of the front guard body (400) and covers the attachment part (to).

The outer rotor decoy of the DC brushless motor (Ill) is formed by attaching a permanent magnet (51) to the inner surface of a cup-shaped case body (93) that also serves as a yoke.The front guard body [
0, a reinforcing support (95) is formed attached to the aggregate (94) extending downward from the center. The reinforcing support (95) is formed of a pipe body, and the lower part of the support (4υ) is supported by a connecting body (96) attached to the upper part of the reinforcing support (95). Therefore, it does not have sufficient strength. At the center of the front guard body Gl (I), the D○ brushless motor (1
Even if υ etc. are attached, it can be stably supported. A mounting body (97) t-
The front guard body (40) is formed to protrude from the front guard body (40), and the neck bead (40) is suddenly supported by the attachment body (97)'.

A lead wire (73) is wired inside the reinforcing support (95).

20 and 21 show an eleventh embodiment of the present invention. FIG. 20 is a side view, and FIG. 21 is an enlarged sectional view of the main part. In the tenth embodiment, the board (77) incorporating the electric fan operation selection control unit Q'rI is installed inside the base 03, but in this embodiment, the board (77) is mounted on the ornament (90). It is something. Furthermore, the support body (4υ) is directly supported by a pipe-shaped support.

In all of the embodiments described so far, the electric fan body (b) does not oscillate, but it is clear that a oscillation mechanism may be formed as in the embodiment described later. Also, Figures 4 and 5
The electric circuit shown in the figure merely shows one implementation structure for functioning as the electric fan ω, and the specific circuit configuration can be constructed as appropriate. Furthermore, in each example, the circuit elements are divided into multiple boards, but 1
The circuit elements to be incorporated into the divided boards are shown as a typical example, and various circuit elements to be incorporated may be considered depending on wiring problems, common use of one circuit element, etc.

Next, the present invention will be explained based on an example of an electric fan having a swinging function. The twelfth embodiment shown in FIG. 22, the thirteenth embodiment shown in FIG. 23, and the fourteenth embodiment shown in FIG. Alternatively, a gear mechanism may be used to reduce the rotational force of the DC bushless motor 0υ. Further, although a synchronous motor is used as the oscillating motor (2), a DC motor may also be used. As shown in FIG. 4, the swing motor (2) is stopped by a drive circuit (161), which operates based on a signal from an operation function control unit (161). In order to electrically separate the circuit section driven by AC from the circuit section driven by AC, a phototriac may be used as shown in Fig. 5, or simply a triac as shown in Fig. 8. You may do so.

The twelfth embodiment shown in FIG.
The support body (4υ) is pivotally supported on the more protruding pivot shaft, and the outer periphery of the cam body (100) attached to the output shaft of the oscillating motor (2) and the pivot pin (101) of the column (c) are connected to the neck. They are connected by a swing ring (102).The substrate (72) is connected to the first
Since the constant voltage circuit (5) and the second constant voltage circuit (10) are incorporated, the DC external connection may be formed in the base unit by wiring from either one.

The thirteenth embodiment shown in FIG. 23 is the fourth embodiment shown in FIG. 10 equipped with a swing motor (2). Support base (7
5) Form a mounting part for the swing motor (2) at the lower front part of the
An eccentric disc is attached to the output shaft of the oscillating motor (2), and one end of the oscillating link, which has a ring that fits into the eccentric disc, is pivoted to the support, making the 8-oscillating mechanism thinner. The aim is to

The 14th embodiment shown in Figure $24 is a DC brushless motor 1υ
The board (72) storage box (IC
I) T-formed integrally, a support (4υ) is fixed to the lower part of the storage box (105), and a swing motor (2υ) is attached to the support (4υ).
) and close the rear opening of the storage box (105).
It is fixed at υ.

Although the DCC brushless motor Ill used in each of the embodiments described above is of an external rotation type, it is not particularly limited, and may be of an internal rotation type as in the fifteenth embodiment shown in FIG. An internal rotary type DC brushless motor (Ill is a cup-shaped fan mounting body with a cylindrical shaft (105) and a shadow formed in the center (
106), a permanent magnet (107) serving as a rotor fixed to the outside of the cylinder shaft (105), and a cup-shaped body (T) fixed to the support (4I).

8) and a stator (109) fixed inside the cup-shaped body (10B).

Furthermore, as explained in the first embodiment, in the embodiments shown above, the rotation speed is controlled by changing the voltage value of the electric power supplied to the DC brushless motor aυ and constantly energizing for one energizing time. The 26th
The electrical circuit shown in FIG.
The power supplied to the C brushless motor aυ is varied by varying the time for supplying power to the brushless motor aυ. Oscillation circuit (
8), the second voltage control circuit (7), and the smoothing circuit (9), the motor power supply section (111) always supplies constant voltage power to the drive/amplification circuit of the DC brushless motor [1B]. . A chopper control circuit (112) controls energization switching and energization time to each winding of the drive/amplifier circuit C23. Therefore. The chopper control circuit (112) becomes a power control section. The chopper control circuit (112) is controlled by a control signal from the fan operation selection control section (2'rl).
When the control is 00%, the circuit operates as in the first embodiment, and rotates at the highest speed. Therefore, in this embodiment, the DC brushless motor (Ill'(iz
Since a supply voltage of 38V is required to rotate the motor 1430 times, the output voltage from the motor power supply section (111) is set to 38V. However, the set voltage can be varied depending on the maximum speed and operating efficiency of the fan.

This embodiment is an embodiment in which the speed of the DC brushless motor (II) is controlled by so-called chopper control, and the chopper control@circuit (112) always has an on-duty of 100.
%, and the output voltage from the motor power supply section (111) may be chopper-controlled; in this case, the motor T
The jL source section (111) also serves as the power control section. Furthermore, the swing motor (2) #''t of this embodiment, all motors of the i-flow motor, and the operation control of the electric fan (to) are all performed by direct current.
The speed control St may be performed by using a C brushless motor, and control may be performed in conjunction with the height of the air blowing. For example, by making the speed of the head faster when the airflow is low than when the airflow is high or medium, the gentle wind can be changed at a faster frequency, so that it does not cause discomfort to the user. be.

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

Figure 27 is a comparative characteristic diagram showing the motor efficiency and torque characteristics of the present invention and a conventional electric fan. The characteristics are diameter 30 (m
The measurements were taken by rotating the three blades. In the characteristic diagram, a solid line indicates the present invention, and a dotted line indicates the conventional one. Further, a indicates efficiency characteristics, and 13 indicates torque characteristics.

Effects of the Invention The present invention controls the rotational speed of the blower blade by fully controlling the DC planless motor.It has good startup performance at low speeds, can perform stable low-speed rotation, and can be controlled using signals. , various controls can be easily performed, and efficient operation can be performed.

[Brief explanation of the drawing]

1 to 7 show a first embodiment of the present invention. Fig. 1 is a right side view, Fig. 2 is a sectional view of the connecting part between the base and the support, Fig. 3 is an enlarged cross-sectional side view of the biological part of the Fi electric fan,
Figure 4 is an electric circuit block diagram. ′! J! Figure I5 is an electrical circuit diagram, Figure @6 is a side sectional view of the packaged state, Figure 7 is a square cross-sectional view, Figure 8 is an electrical circuit diagram of the main part of the '9@2 embodiment, and Figure 9 is the $6 implementation. FIG. 10 is a partially sectional side view of the fourth embodiment. Fig. 11 is a partially sectional side view of the fifth embodiment, and Fig. 12 is '
! Partial cross-sectional side view of 1IJ6 embodiment, Figure 13 - $1
Figure 5 shows the seventh embodiment, Figure 13 is a side view, Figure 14 is an enlarged sectional view of the main part, Figure 15 is a perspective view of the neckpiece, and Figure 16 is the main part of the eighth embodiment. Enlarged sectional view, No. 17
The figure is a side view of the ninth embodiment. FIG. 18 and FIG. 19 show the tenth embodiment. FIG. 18 is an enlarged sectional view of the main part, and FIG. 19 is a side view. FIG. 20 and FIG. 21 show the eleventh embodiment. FIG. 20 is a side view, and FIG. 21 is an enlarged sectional view of main parts. Fig. 22 is a partially sectional side view of the 12th embodiment, Fig. 25 is a partially sectional side view of the 13th embodiment, Fig. 24 is an enlarged sectional view of main parts of the 14th embodiment, and Fig. FIG. 26 is a partial cross-sectional side view of the fifteenth embodiment, FIG. 26 is an electric circuit block diagram of the sixteenth embodiment, and FIG. 27 is a characteristic diagram common to each embodiment of the present invention. (4)... Rectifier circuit section, συ... DC brushless motor. □□□...Drive circuit unit, □□□...Variable voltage control unit (motor power supply unit, power control unit), CIIη...Fan operation selection control unit. C311...stand, (b)...fan living body,■
...Blower blade. Ol... Rear guard body %0Q... Front guard body, (11
1)...Motor power supply section, (112)...Chopper control circuit (power control section).

Claims (1)

[Scope of Claims] 1. A living fan having a blowing blade, a guard body that covers the blowing blade, and a DC brushless motor that drives the blowing blade, a stand that supports the living fan, and a stand that supports the living fan, and a stand that supports the living fan, and a drive circuit section; a motor power supply section that supplies power to the DC brushless motor via the drive circuit section;
a rectifying circuit unit that supplies power to the motor power supply unit; a fan operation selection control unit that controls the operation of the DC brushless motor; and a control signal from the fan operation selection control unit to control the DC
An electric fan comprising: a power control unit that controls power supplied from a motor power supply unit that supplies power to a brushless motor. 2. The electric fan according to claim 1, wherein the motor power supply section and the power control section are formed by a variable voltage control section that controls the voltage from the rectifier circuit section using a control signal from the electric fan operation selection control section. . 3. A patent claim in which the power control section is formed by a chopper control circuit that is incorporated in the drive circuit section, controls the power supply time from the motor power supply section to the DC brushless motor, and is controlled by the fan operation selection control section. The electric fan described in item 1.