JPS63179198A - Blower - Google Patents

Abstract

PURPOSE:To prevent heat from adversely affecting a rotation detector by opposing rotor position detecting members opposing to the magnetic poles of the rotor, to a DC brushless motor through the center of a supporting member which supports the motor and having the supporting member function as a heat insulator. CONSTITUTION:The mayor body 3 of a fan has a sectionally L-shaped supporting board 10 supported turnably by a neck piece 9 axially held by a stand 2, has a DC brushless motor 11 mounted in front of said supporting board 10, and has fan blades 13 tightened to the turning shaft 4 of said motor 11. And the mayor body 3 is capable of swinging by the operation of a swing driving member 14. In this case, a rotor detecting member 5 is mounted at the end part of the turning shaft 4 and a rotation detector 7 is disposed on a base board 6 in the position opposing to said member 5. When the rotor detecting member 5 turns, the position of the magnetic pole varies and the rotation detector 7 detects the variation and controls the electric current fed to the winding of a stator 19, whereby driving the motor 11.

Description

Detailed Description of the Invention (a) Industrial field of application Regarding the blower device using a DC brushless motor according to the present invention, (b) Prior art As a technology prior to the present invention, ζ Japanese Patent Application Laid-Open No. 60-22259
There is an air blowing device described in Publication No. 5. The rotation detector is disposed opposite the rotor and detects the magnetic poles of the rotor to detect the rotational position when the air is tc. A cooling air flow path is formed to prevent heat shadows.

1. Problems to be solved by the invention In the conventional technology, it is necessary to form a defined flow path to cool the rotation detection body, which complicates the structure and makes it difficult to balance the rotating part during rotation. □ The present invention provides an air blower a that prevents the influence of air generated from the stator on the rotation detection body and allows for elegant balance adjustment during rotation of the rotating parts. This is what we provide.

B) Means for solving all problems The present invention a) A DC brushless motor that drives the blower blade;
A support body supporting a DC brushless motor on one side, a rotor position detection member attached to a rotating shaft protruding from the other side of the support body, and a rotation detection body disposed in a portion facing the position detection member. The present invention has a one-to-one correspondence with the magnetic poles of the rotor, and the next rotor position detection member is located on the opposite side of the DC brushless motor with the support as a border, thereby making it possible to detect the rotation of the rotor. On the other hand, the support body acts as an interlocking body and can be used as a member for detecting the rotor position and as a member for adjusting the rotational balance of the rotating portion.

(F) Example @ The first example shown in Figures 1 to 5, the second example shown in Figures 6 and 7, the third example shown in Figure 8, and the fourth example shown in Figure 9. EXAMPLE The present invention will be explained based on the fifth embodiment shown in Figure WJ10 and the sixth embodiment shown in Figures 11 and 12, and the first embodiment will be explained. Regarding the electric fan 1, FIG. 1 is a cross-sectional view of the electric fan 3 supported by the support 2 of the electric fan 1 so as to be able to freely adjust the elevation angle, FIG. 2 is a side view of the electric fan 1, and the third factor is a block circuit diagram of the electric fan 1. , FIG. 4 is a cross-sectional view showing the relationship between the rotor position detection member 5 attached to the rotating shaft 4 and the rotation tester 7 attached to the board A, and FIG. 5 is a perspective view of the rotor position detection member 5. Diagram 0 Consists of a base 8 with a support 2 protruding from the fan 1, and a fan body 3 supported by the support 2 □ A fixed support formed integrally with the support 2 and the base 8, and a fixed support On the other hand, an electric fan consisting of a movable support that moves up and down, a neck bead 9 attached to the support 2, a cross-sectional support 10 rotatably supported by the support 9, and a support 10 that can be attached to the front surface of the support 10. DC brushless motor 11 and DC brushless motor 1
A blower blade 13 is detachably attached to the rotating shaft 4 of 1 with a spinner 12, an oscillating drive unit 14 is attached to the upper surface of the support 10, a front cover body 15 is attached to the support 10, and a rear cover body 15 is attached to the support 10. It includes a cover body 16 and a guard body 18 that is detachably attached to the front cover body 15 with a nut body 17, and the blower blade 13, spinner 12, nut body 17, and front cover body 15 are molded with synthetic resin. be done. The support body 10 and the rear cover body 16 are formed of metal, specifically, the support body 10 is formed by aluminum die casting, and the rear cover body 16 is formed by pressing onto an iron-based sheet metal.

A DC brushless motor 111"J stator 19 is fixed to the front surface of a support body 10 with a cup-shaped motor case 20 that is supported in and out of the inner surface, and the support body 10 also serves as a part of the motor case 20. □The rotor 21 is a rotating shaft 4 is supported by the motor case 20 and the bearings 22 and 23 of the support body 10 so as to be rotatable, and the rotor 21 is formed of magnets, and the circumferential surface thereof is magnetized in the form of a plurality of poles. In this example, 9
The winding of 0 stator 19 that is magnetized N, S, N, S at 0 degrees each? IJrt In this example, 3-phase Y connection is made.
, Each phase is switched in accordance with the magnetic poles of the rotor 21 to form a rotating magnetic field □ Bearing 22 ζ Spring body 23 Frame Formed by an oil-impregnated sleeve bearing, the surroundings of which are impregnated with oil to form a felt L. A tank 25 is formed. A motor case 20 and a special leave 10 protrude from the rotating shaft 4, the blower blades 13 are fully attached to the T portion protruding from the motor case 20, and a rotor position detection member 5 is attached to the protruding skin portion of the support 10. In this embodiment, the rotor position detecting member 5 is formed with a magnet magnetized similarly to the rotor 21, and is disposed parallel to the rear surface of the substrate 6rc support @10, and the oil tank 25 It is positioned by the support ribs 26 and attached to the support plate 10 with screws. A rotation detection body 7 is mounted on a portion of the base 86 facing the outer circumferential portion of the rotor position detection member 5, and a magnetic detection element is used in this embodiment. A part of the electric circuit described below is also mounted on the board 6 □ Board 6
The ground terminal of the support body 10 is connected to the lead wire 27. The support body 10 and the rear cover body 16 are electrically connected, and the base g! 6vi-covering prevents the influence of external noise on the circuit mounted on the board 6, and also prevents noise generated from the mounted circuit from leaking to the outside.

The swing drive unit 14σ is formed by a swing motor IfefIt 9, whose output shaft protrudes from the lower surface of the support 10, a cam body is attached to the output shaft, and the cam body and the neck piece 9 are connected by a link. □The supporting body 10 is clearly written on the Nevku Piece 9, so that the supporting body 10 is reciprocated from side to side, and the electric fan main body 3 is oscillated from side to side.Next, the electric circuit will be explained based on FIG. 3.

Broadly divided into electric circuits, it is made up of six sections: an AC power supply section 30 consisting of the oscillating motor 14, commercial AC power and a filter circuit, a rectifier circuit section, a wC1 constant voltage circuit, and a second constant voltage circuit. A DCtC power supply section 31 consisting of an oscillation circuit, a first voltage control circuit, a second voltage control circuit, and a smoothing circuit, a motor #1 Jat arm portion 62, a motor control section, a drive/amplification circuit, a position detection circuit, and a rotation abnormality detection circuit. The electric fan function selection section 34 is electrically connected to the reference clock circuit and the reset circuit. It consists of a reference selection section 35 consisting of an angle selection section and a forward/reverse mode selection section □A motor control section and an operation function control section are formed by a microcomputer, and a drive/amplification circuit is formed by a plurality of switching transistors. The second voltage control circuit is made up of a transistor, a smoothing coil and a capacitor, an operation selection Whrx switch, a piezoelectric buzzer for the audio output part, a light emitting diode for the display part, and a neck The vibration motor drive circuit is formed by a triac, a rotation abnormality detection circuit (a), and a comparator, and any conventionally known circuits may be used for the specific circuits of each circuit part. In this embodiment, the board 6 includes an AC [deep section 30, fan function selection section 64, and DCtm section 3].
Other electrical circuits excluding a part of 1 and a part of the reference selection section 35 w
Components that produce a large amount of heat, such as switching transistors of the drive/amplifier circuit, are mounted on a remote part of the rotation detection body 7L9 of the board 6 on which r is mounted, to prevent heat from being transferred to the rotation detection body 7. The impact amount has been reduced. -1 Also rear cover body 16
In the part near the top of the board 6, there is a? f, pore 36? □ The DC brushless motor 11d rotates the rotor position detection member 5 in synchronization with the rotor 21, and the rotation detector 7 detects a change in the magnetic pole, thereby driving and energizing each winding of the stator 19.
It can be rotated by switching to the amplifier circuit -1
The rotational speed is controlled by changing the voltage supplied to the DC brushless motor 11 from the motor control power supply section 32 from 2DC8V to 45V. Changes in the magnetic poles of the rotor 21 (Unlike the conventional technology, which detects changes in the magnetic poles of the rotor 21 by disposing the rotation detector 7 inside the iDC brushless motor 11, the rotor position detection member 5 is installed outside the motor case 20 of the DC brushless motor 11). DC brushless motor 1 by forming
1 can be made smaller and the efficiency of assembly can be improved, and the thermal influence from the stator 19 on the rotation detection body 7 can be reduced.
1, the rotational balance after assembly of the DC brushless motor 11 can be performed using the rotor position detection member 5. In this embodiment, the balance adjustment hole 37 is formed as shown in FIG. This is done by forming.

Further, a member 5 for detecting the position of the rotor 21 and for detecting the position of all rotors.
By using the DC brushless motor 11 and electric fan 1, even when changing the functions of the DC brushless motor 11 and electric fan 1
This can be applied to the brushless motor 11 without making any major changes.

In the sixth factor and the second embodiment shown in FIG. Detection sensor (
For example, it is formed using a photoreflector). By detecting the magnetic pole position of the rotor 21 with a photodetection sensor, highly accurate detection can be performed without leakage of magnetism like that of the magnetic detection element. 3.4.5 Arrangement of the substrate 6 in the embodiments In each embodiment, the base 161 is arranged horizontally, and the support portions 39 and 40 of the support body 10 and the rear cover body 16 are arranged horizontally.
It is supported between the rear cover body 16 and the support body 10, and the space is bent vertically into 7 sections. The components are mounted so that they are located on the base and six sides facing the partitioned upper space 41, and the rotation detector Z is mounted on the lower surface of the board 6 facing the rotor position detection member 5. It is something. A cooling hole 36 is formed in the rear cover body 16 facing the upper space 41, and all circuit components are mounted on the lower surface side of the base 6 of the fourth embodiment shown in FIG. 9. ◇FIG. 10 In the fifth embodiment, the substrate 6 is
There are m pieces arranged one above the other. 3.4.5 Example a
The space surrounded by the rear cover body 16 is effectively used to reduce the shadow 1 on the rotation detection body 7.

11.12 shows a sixth embodiment in which the oscillating drive section 14 in the first embodiment is replaced with a rotor position detection section 475 to form a stator 42 for power generation, and the rotor position detection member 5 is rotated for power generation. The electromotive force generated in the winding of the □ power generation stator 42, which is used as a child, drives the oscillation drive unit 14 formed by the oscillation motor. t2fj of the swinging drive unit 14
By utilizing the rotation of the lkDc brushless motor 11, the commercial AC ts1oov is only applied to the primary @ of the rectifier circuit, and the measures for insulation can be designed to be the same as those for low voltage, improving safety. do. ,
Oscillation speed synchronized with the rotation speed of the Da brushless motor 11! ◇The present invention is not limited to the sentence structure shown in each of the above-mentioned embodiments, but may include the specific shape, material, etc. of each constituent part a. This can be implemented with various modifications.

For example, in order to efficiently cool each component mounted on the board 6, a blower g can be formed in the rotor position detecting member 5, so that it also acts as a cooling hole.

After that, the cover body 16 is formed of iron-based gold J4 plate, and the substrate 6 is
However, a separate shield case is attached to the board 6 as shown by the dashed lines in Figures 1, 8, 9, 10, and 11, and the rear cover is Even if the body 16 is made of synthetic resin, the swing drive part 141 (not formed by a swing motor, but by connecting a gear mechanism to the rotation of the DC brushless motor 11 @ 4) will not work. (g) Effects of the Invention By detecting the position of the rotor of the qDC brushless motor of the present invention using a separately formed position detection member, the structure of the DC brushless motor can be simplified and made compact, and the wiring can be reduced. It is easy to work and make changes as needed, improves position detection accuracy, and provides stable air blowing.

[Brief explanation of the drawing]

An example of the present invention in the figure? The first embodiment is shown in FIGS. 1 to 5, with FIG. 1 being a sectional view, and FIG. 2 being a side view.
'M3 is a ζ block circuit diagram, Figure 4 is a sectional view of main parts, and Figure 5 is a sectional view of the main parts.
The figure is a perspective view of the rotor position detection member, FIG. 6 is a cross-sectional view of the main part of the second embodiment, FIG. 7 is a perspective view of the same, FIG. lr8 is a partially sectional side view of the third embodiment, and FIG. 10 is a partially sectional side view of the fourth embodiment, FIG. 10 is a partially sectional side view of the fifth embodiment, and FIG.
Figure 1 is a sectional view of the sixth embodiment, I! Fig. 12 is a perspective view of the oscillating drive unit □ 4...rotating shaft, 5... rotor position detection member, 6...
... Substrate, 7... Rotation detection body, 10... Support body, 1
DESCRIPTION OF SYMBOLS 1... DC7" raspless motor, 16... Rear cover body, 19... Stator, 20... Motor case, 21
...rotor.

Claims (1)

[Claims] 1. A DC brushless motor that drives a blower blade;
A support body supporting a brushless motor on one side, a rotor position detection member attached to a rotating shaft protruding from the other side of the support body, and a substrate having a rotation detection body disposed on a portion facing the position detection member. An air blowing device comprising at least a support body and a cover body that covers a substrate. 2. Mount the DC brushless motor control circuit on the board,
Claim 1 in which the cover body is formed of a conductor.
Air blower device as described in section. 3. The air blower according to claim 1 or 2, wherein the support body also serves as a rear case of a DC brushless motor. 4. The air blowing device according to claims 1 to 3, wherein the support is formed by die-casting aluminum. 5. The blower device according to claims 1 to 4, wherein the DC brushless motor is of an inner rotor type. 6. Claims 1 to 5, in which the rotor position detection member is formed of a magnetic plate magnetized similarly to the rotor, and the rotation detection body is formed of a magnetic detection element. air blower. 7. A patent claim in which the rotor position detection member is formed of a plate consisting of a reflective part and a non-reflective part corresponding to the position of the rotor, and the rotation detection body is formed of a photodetecting element. Range 1
The blower device according to items 5 to 6. 8. The air blowing device according to claims 1 to 7, which serves as an electric fan.