JP2003254288A - Blower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blower which efficiently cools a driving element of a motor despite a thin casing. <P>SOLUTION: The blower comprises a multiblade fan 50 disposed in the casing 30 and mounted on a rotary shaft 43, the drive motor 40, and a control board 60 mounted with a power IC 62. The multiblade fan 50 has an annular support frame 51 mounted on the rotary shaft 43, and a plurality of blades 52 along the circumference of the support frame 51. The drive motor 40 has a stator 45 disposed inside the support frame 51, and a rotor 44 integrated with the rotary shaft 43 in a position enclosed by the stator 45. The power IC 62 mounted on the control board 60 is disposed outside the stator 45 of the drive motor 40 along the radius of the rotary shaft 43, and is oriented to the blades 52. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower for laundry and the like, and more particularly to a blower for laundry, which can be made smaller and have higher performance.

[0002]

2. Description of the Related Art FIG. 3 is a view showing a conventional blower 10 used for a laundry blower or the like. The blower 10 includes a casing 11, a sirocco fan 12 housed in the casing 11, a drive motor 13 provided outside the casing 11, and driving the sirocco fan 12.
The control board 14 is provided with a power IC for controlling the drive motor 13. In addition, casing 1
Reference numeral 1 is composed of a first casing 11a having a bottom and a second casing 11b formed so as to cover the opening of the first casing 11a and formed in a plate shape.

[0003]

The structure of the blower described above has the following problems. That is, the blower 1
At 0, since the drive motor 13 is provided outside the casing 11, the height indicated by H in FIG. 3 becomes large and it is difficult to reduce the thickness.

FIG. 4 is a view showing an example in which the drive motor 13 is arranged in the casing 11. Here, the arrangement of the control board 14 will be examined. If the control board 14 is arranged at the position indicated by the chain double-dashed line A, the cooling air does not hit the control board 14 because of the support plate 12a of the sirocco fan 12. Therefore, there are problems that the cooling efficiency of the power IC is poor, the performance is degraded, and the substrate cannot be made large. On the other hand, at the position B, there is a problem that the substrate cannot be made large although the cooling air is blown.

Therefore, an object of the present invention is to provide a blower capable of efficiently cooling a drive element of a motor even when the casing is made thin.

[0006]

In order to solve the above problems and achieve the object, the blower of the present invention is constructed as follows.

(1) A fan arranged in the casing and attached to the rotating shaft, a drive motor arranged in the casing and driving the fan to rotate via the rotating shaft, and arranged in the casing. The fan is provided with a control board on which a power supply element for controlling the drive motor is mounted, and the fan is provided with an annular support frame attached to the rotation shaft and a plurality of the support frames along the circumferential direction. The drive motor has a stator disposed inside the support frame and a rotor integrally provided with the rotary shaft at a position surrounded by the stator. The power supply element is arranged radially outward of the rotary shaft with respect to the stator of the drive motor, and is arranged toward the vane side.

(2) The blower described in (1) above is characterized in that at least the stator and the control board are integrally molded with resin.

[0009]

1 is a diagram showing a blower 20 according to an embodiment of the present invention, in which (a) is a plan view,
(B) is a side view. 2 shows the blower 10 in FIG.
It is sectional drawing cut | disconnected by the XX line in (a) of FIG.

The blower 20 has a casing 30. In the casing 30, a drive motor 40 and a sirocco fan 5 arranged so as to surround the drive motor 40.
0 and a control board 60 for driving the drive motor 40.

The casing 30 includes a first casing 31 formed in a cylindrical shape with a bottom, and a second casing 32 provided so as to cover the opening of the first casing 31.
And the first and second casings 3
1, 32 are airtightly fastened using bolts 33a and seal packing 33b. Further, in FIG. 1, reference numeral 34 indicates a blower port, and 35 indicates an intake port.

The drive motor 40 includes a pair of bearing portions 41, 4
2 and a rotary shaft 43 supported by these bearings 41, 42
And a rotor 44 held by the rotary shaft 43, and a stator 45 arranged so as to surround the rotor 44. The outer diameter of the stator 45 is smaller than the inner diameter of the support frame 51 described later.

The bearing portion 41 is a bearing bracket 41a.
And a ball bearing 41b that supports the rotating shaft 43. The bearing portion 42 includes an embedded metal 42a and a ball bearing 42b that supports the rotating shaft 43.

The stator 45 includes a stator core 45a and a coil 45b wound around the stator core 45a. The outer diameter of the stator core 45a is smaller than the inner diameter of a support frame 51 of the sirocco fan 50, which will be described later.

The sirocco fan 50 has an annular support frame 51.
A plurality of blades 52 are provided along the circumferential direction of the support frame 51, and a bracket 53 formed integrally with the support frame 51 and fixing the support frame 51 to the rotation shaft 43.
The support frame 51 and the bracket 53 are formed of a copper plate or resin.

The control board 60 includes a circuit board 61 arranged in the second casing 32, and a power IC 62 mounted on the board 61 and supplying electric power to the stator 45. The power IC 62 is arranged on the outer side in the radial direction of the rotating shaft 43 with respect to the stator 45, and is attached to the vane 52 side of the circuit board 61.

The bearing bracket 41a, the embedded metal 42a, the stator 45 and the control board 60 described above are integrally molded with the resin material R. The resin material R is generally a thermosetting resin, but if the temperature rise of the electric motor is low, a thermoplastic resin may be used. Also, the first
The second casings 31 and 32 are made of resin in this embodiment, but steel plates may be used.

The blower 20 constructed as described above operates as follows. That is, electricity is supplied to the coil 45b of the stator 45 via the control board 60. As a result, a rotating magnetic field is generated, and the rotor 44 receives a rotational force and starts rotating. Then, as the rotary shaft 43 rotates,
Sirocco fan 50 is rotated. By this rotation, the outside air is introduced from the intake port 35, and the air blowing from the air blowing port 34 to the target place is started.

On the other hand, the power IC 62 generates heat during operation. The heat generated in the power IC 62 is transmitted to the surface via the resin material R. Since the resin material R is cooled by the sirocco fan 50, the power IC 62 is also cooled.

By configuring the blower 20 according to the present embodiment as described above, the drive motor 40 can be arranged inside the sirocco fan 50, and the thickness can be reduced. Even in the case of such an arrangement, part of the control board 60 is arranged outside the stator 45, and the power IC 62 is directed toward the blade 52 side of the sirocco fan 50 with respect to the circuit board 61. Since the power IC 62 can be efficiently cooled by the sirocco fan 50, the performance will not deteriorate.

The present invention is not limited to the above embodiment. That is, although the sirocco fan is used as the fan in the above-described example, the fan can be applied to other blowers as long as the drive motor can be arranged inside the fan. Of course, various modifications can be made without departing from the scope of the present invention.

[0022]

According to the present invention, the drive element of the motor can be efficiently cooled even when the casing is made thin, and the drive element is not destroyed or the performance of the blower is not deteriorated.

[Brief description of drawings]

FIG. 1 is a diagram showing a blower according to an embodiment of the present invention, in which (a) is a plan view and (b) is a side view.

FIG. 2 is a view showing the blower, and is X in (a) of FIG.
-A cross-sectional view taken along the arrow and cut along the X-ray.

FIG. 3 is a diagram showing an example of a conventional blower, (a)
Is a plan view and (b) is a side view.

FIG. 4 is a diagram showing a problem of a conventional blower,
(A) is a plan view and (b) is a side view.

[Explanation of symbols]

20 ... Blower 30 ... Casing 40 ... Drive motor 43 ... Rotating axis 44 ... rotor 45 ... Stator 50 ... Sirocco fan 51 ... Support frame 52 ... wing plate 60 ... Control board 62 ... Power IC R ... Resin material

Continued front page    F term (reference) 3H022 AA02 BA03 BA07 CA50 CA54                       DA03                 5H605 AA01 BB05 CC01 CC02 DD09                       DD11 DD32 EB10 EB16 FF06                       GG18                 5H607 AA02 BB01 BB14 CC05 CC07                       DD19 FF05 GG08 JJ01 JJ10                       KK07                 5H609 BB01 PP16 QQ02 QQ12 QQ13                       RR07 RR19 RR32 RR58 RR74                 5H611 AA09 BB01 BB04 TT01 UA04                       UB02

Claims (2)

[Claims] 1. A fan arranged in a casing and attached to a rotating shaft, a drive motor arranged in the casing and drivingly rotating the fan via the rotating shaft, and arranged in the casing. The fan includes a control board on which a power supply element for controlling the drive motor is mounted, and the fan is provided with an annular support frame attached to the rotary shaft and a plurality of the support frames along the circumferential direction. The drive motor has a stator disposed inside the support frame, and a rotor integrally provided with the rotary shaft at a position surrounded by the stator. The blower is characterized in that the power supply element is arranged radially outward of the rotary shaft with respect to the stator of the drive motor, and is arranged toward the vane side. 2. At least the stator and the control board,
The blower according to claim 1, wherein the blower is integrally molded with resin.