JPH0637594U - Sirocco fan - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a silonco fan capable of facilitating wiring from a temperature detector to a circuit board. [Structure] A housing 1 and a motor unit 2 installed in the housing 1 are provided. The housing 1 includes a peripheral wall having an air outlet, and a pair of opposing walls 5 and 6.
The air intake port 9 is provided on the opposite wall 6 on one side where the circuit board 18 is close.
To open. A temperature detector 34 is attached to a part of the circuit board 18 so that the temperature detector 34 corresponds to the air intake port 9. A blade 29 is attached to a blade mounting board 28 that projects from the motor unit 2 and is arranged on the other opposing wall 5 side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sirocco fan.

[0002]

[Prior art]

 As a conventional sirocco fan, there is one shown in FIG.

This sirocco fan includes a housing a and a motor portion b mounted in the housing a.

The housing a is composed of a peripheral wall d having an air outlet c and a pair of opposing walls e and f.

The motor part b has a shaft h rotatably supported by a cylindrical part g erected on one of the opposing walls f via a bearing, and a rotor magnet via an inner peripheral surface of the yoke via a yoke. It includes a bowl-shaped base portion j to which i is fixed, and a stator k fitted on the cylindrical portion g.

The bowl-shaped base portion j of the motor portion b is provided with a blade mounting board m adjacent to one facing wall f, and the blade mounting board m is provided with blades n ...

That is, by rotating the bowl-shaped base j, air is sucked into the housing a from the air inlet p formed through the other opposing wall e, and the air in the housing a is blown as indicated by an arrow. Discharge from the outlet c.

A temperature detector q is provided at the air intake port p, which detects the temperature in the vicinity of the air intake port p and controls the rotation speed of the motor section b in accordance with this temperature.

In FIG. 5, r is a circuit board.

[0010]

[Problems to be solved by the device]

 Therefore, in the conventional sirocco fan shown in FIG. 5, the lead wires for connecting the circuit board r and the temperature detector q must be provided along the other opposing wall e, the peripheral wall d, and one opposing wall f. However, this wiring work is troublesome and inferior in workability, and it is also troublesome to process the lead wire so as not to disturb the rotation of the rotating body (the bowl-shaped base j, the blade n, etc.).

Therefore, an object of the present invention is to provide a sirocco fan capable of facilitating wiring between a temperature detector and a circuit board.

[0012]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a sirocco fan according to the present invention comprises a housing including a peripheral wall having an air outlet and a pair of opposing walls, and a motor part installed in the housing. In the fan, an air inlet is provided on one of the opposite walls to which the circuit board is close, and a temperature detector is attached to a part of the circuit board, and the temperature detector is attached to the air inlet. In addition, a blade for sucking air from the air inlet into the housing and discharging the air in the housing from the air outlet is attached to the other opposing wall. It is attached to the board.

[0013]

[Action]

 The blade draws air from the air intake into the housing, and the air in the housing is discharged from the air outlet. At this time, the temperature detector corresponding to the air intake is located near the air intake ( Specifically, it is possible to detect the temperature of a portion slightly inside the housing from the suction port).

That is, the rotation speed of the motor unit is controlled on the basis of the temperature detected by the temperature detector, whereby the air volume from the air outlet can be adjusted.

In this case, however, since the temperature detector is attached to the circuit board, the wiring between the temperature detector and the circuit board can be simplified.

Further, since the blade is attached to the blade mounting board disposed on the other opposing wall (that is, the opposing wall that does not face the circuit board), the air that has entered from the air intake port is attached to the blade. It is discharged from the air outlet without being affected by the board.

[0017]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the drawings illustrating an embodiment.

FIG. 1 shows a sirocco fan according to the present invention, which includes a housing 1 and a motor unit 2 installed in the housing 1.

As shown in FIG. 4, the housing 1 includes a peripheral wall 4 having an air outlet 3 and a pair of opposing walls 5 and 6.

Specifically, the housing 1 is composed of a first member 1a and a second member 1b, and each of the first and second members 1a, 1b has a protrusion 8, 8 having a hole 7, 7. As shown in FIG. 4, the bolts are inserted into the holes 7, 7 of the protrusions 8, 8 in a state in which the first and second members 1a, 1b are overlapped, and the first and second members 1a, 1b are overlapped. The two members 1a and 1b are connected.

As shown in FIG. 2, a plurality (four in the illustrated example) of air inlets 9 ... Are opened in the opposite wall 6 of the housing 1 in the circumferential direction.

Next, as shown in FIG. 1, the motor unit 2 has a stator 11 fitted and fixed to a cylindrical portion 10 provided on one of the facing walls 6 and bearings 12 a and 12 b on the cylindrical portion 10. Shaft 13 rotatably supported by a shaft, a bowl-shaped base portion 14 fixed to the shaft 13, and a rotor magnet 17 fixed to an inner peripheral surface of a peripheral wall 15 of the bowl-shaped base portion 14 via a yoke 16. And a circuit board 18 which is fitted onto the cylindrical portion 10 and is brought close to one of the opposing walls 6.

Therefore, the motor unit 2 is a so-called outer casing in which the bowl-shaped base portion 14 which is a rotor is provided in an encircling manner with respect to the stator 11 which is fixed to the facing wall 6 which is a fixed housing and the cylindrical portion 10. It forms a rotor type brushless motor.

The stator 11 includes a stator core 20, an insulator 21 attached to one end face of the stator core 20, an insulator 22 attached to the other end face of the stator core 20, and a stator core 20 attached with the insulators 21 and 22. And a stator coil 23 wound around the tooth.

The one insulator 21 is provided with a hanging piece 24, and a terminal 25 connected to the stator coil 23 projects from the hanging piece 24, and the terminal 25 is connected to the circuit board 18.

The hanging piece 24 and the terminal 25 are positioned with respect to the circuit board 18, and the terminal 25 also serves as a connection to the circuit board 18. Therefore, the stator 11 can be easily connected to the circuit board 18 without incorrect connection.

The bowl-shaped base portion 14 includes an upper wall 27 having a boss portion 26, and the above-mentioned peripheral wall 15 suspended from the upper wall 27, and a blade mounting plate 28 projects from the upper wall 27 side of the peripheral wall 15. Set up.

That is, the blade mounting board 28 is disposed near the other opposing wall 5. A large number of blades 29 are attached to the blade mounting board 28.

Therefore, the large number of blades 29 are supported by the blade mounting plate 28 positioned on the opposing wall 5 side, in other words, on the side opposite to the opposing wall 6 side on which the motor unit 2 is held and fixed.

The blades 29 are provided on the outer diameter side of the air intake port 9, and when the motor portion 2 is driven to rotate the bowl-shaped base portion 14, the air is supplied from the air intake port 9 to the housing 1 as indicated by an arrow A. The air in the housing 1 is sucked in and is discharged from the air outlet 3 as shown by an arrow B.

The blade 29 rotates counterclockwise in FIG. Along with this, the inflowing air forms a swirling flow in the vicinity of the air intake port 9. Therefore, the air suction port 9 has an acute-angled tip in the rotational direction corresponding to the swirling flow, sucks air efficiently, and suppresses noise. In addition, a support member that supports the cylindrical portion 10 is formed between the air suction ports 9 in the opposing wall 6 in the circumferential direction.

Further, a preload applying member 32 is interposed between the inner end surface 30 of the boss portion 26 of the bowl-shaped base portion 14 and the bearing 12a on the boss portion 26 side.

The preload applying member 32 includes an elastic material 32a made of rubber, synthetic resin or the like fitted on the shaft 13 and a flat plate body 32b made of a flat washer fitted on the shaft 13. The flat plate body 32b contacts the end surface of the inner ring 31 of the bearing 12a on the boss side.

A ring body 33 for receiving the inner ring 31 of the bearing 12b is attached to the tip of the shaft 13.

Therefore, the elastic force of the elastic material 32a pushes the inner ring 31 of the bearing 12a toward one of the opposing walls 6 and a preload is applied to the inner ring 31.

That is, the preload applying member 32 can apply a stable preload to the bearing in the thin motor unit that can secure only a small space.

Although the elastic member 32a is a flat plate having a hole in the center in the illustrated example, it may be an O-ring or the like.

By the way, it is possible to use a wave spring as the preload applying member, but in this case, if the interposing space is too small, so-called “fatigue” occurs and the function as the preload applying member is exerted. I can't.

Therefore, the temperature detector 34 is attached to the circuit board 18. As the temperature detector 34, for example, a thermistor or the like is used.

That is, the temperature detector 34 is attached to the outer peripheral side of the circuit board 18 and corresponds to one air intake port 9 (for example, the air intake port 9 shown in FIG. 2B).

Therefore, the temperature detector 34 detects the temperature in the vicinity of the air intake port 9 (specifically, a portion slightly inside the housing 1 from the air intake port 9) and based on this temperature. Then, the rotation speed of the motor unit 2 is controlled to adjust the air volume from the air outlet 3.

In this case, since the temperature detector 34 is provided in the vicinity of the air intake port 9, the detected temperature is not the temperature inside the housing 1 warmed by the motor unit 2 but close to the outside temperature. , You can get accurate air volume.

Further, since the blade mounting board 28 is provided on the other opposing wall 5 side, the wind entering from the air suction port 9 is not disturbed by the plate mounting board 28, and the housing as shown by the arrow A is shown. It is sucked into 1.

Therefore, according to this sirocco fan, since the temperature detector 34 can be directly connected to the land portion of the circuit board 18, a lead wire for connecting the temperature detector 34 and the circuit board 18 is required. Not.

As shown in FIG. 2, the power supply lead wire 35 from the circuit board 18 is discharged to the outside through the air suction port 9 of the second case. A lead wire guide portion 37 is formed on the outer surface 36 of the.

The lead wire guide portion 37 has a concave groove 38 formed in the outer surface 36, and a protruding ridge 39 is formed in the concave groove 38. As shown in FIG. It is constituted by forming fitting grooves 40 ... In which the respective wires 35a, 35a are fitted.

That is, as shown in FIG. 2, the lead wire 35 protruding from the air intake port 9 is guided by the narrow width portion 38 a of the concave groove 38 and enters the wide width portion 39 a of the concave groove 38. , The wires 35a and 35b are fitted in the fitting grooves 40 of the protruding ridge 39, and in this state, the end face of the protruding ridge 39 is melted (as the housing 1 is made of plastic, it is melted as shown in FIG. 3). By forming the welded portion 41, the lead wire 35 can be held and pulled out in a stable state.

The present invention is not limited to the above-described embodiments, and the design can be freely changed without departing from the scope of the present invention. For example, the shape and size of each air intake port 9 can be freely changed. The number of the air intake ports 9 can be increased or decreased.

Further, the number of blades 29 can be freely increased or decreased as long as it is capable of sucking air into the housing 1 from the air suction port 9 and discharging the air in the housing 1 from the air outlet port 3. The size and shape can be freely changed.

[0050]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects.

Since the temperature detector 34 can be attached to the circuit board 18, the wiring between the temperature detector 34 and the circuit board 18 is simplified (it is necessary to wire the lead wires along the housing as in the conventional case). It is possible to assemble without considering the wiring process of the lead wire for connecting the temperature detector 34 and the circuit board 18, and the manufacturing workability is excellent.

Since the blade mounting board 28 for holding the blade 29 is provided on the other opposing wall 5 side (without being provided on the one opposing wall 6 side where the air suction port 9 is provided), The air sucked into the housing 1 from the air suction port 9 without being influenced by the blade mounting board 28 is discharged from the air blowout port 3 and efficiently functions as a sirocco fan.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view showing an embodiment of the present invention.

FIG. 2 is a bottom view of the housing.

FIG. 3 is an enlarged sectional view of a main part of a housing.

FIG. 4 is a side view of the housing.

FIG. 5 is a sectional view showing a conventional sirocco fan.

[Explanation of symbols]

 1 Housing 2 Motor Section 3 Air Outlet 4 Peripheral Wall 5 Opposing Wall 6 Opposing Wall 9 Air Inlet 18 Circuit Board 28 Blade Mounting Board 29 Blade 34 Temperature Detector

Claims (1)

[Scope of utility model registration request] 1. A sirocco fan including a housing 1 comprising a peripheral wall 4 having an air outlet 3 and a pair of opposing walls 5 and 6, and a motor portion 2 installed in the housing 1. , An air intake port 9 is provided on one of the opposing walls 6 close to the circuit board 18, and a temperature detector 34 is attached to a part of the circuit board 18, and the temperature detector 34 is attached to the air intake port. Blades 29 for sucking air into the housing 1 from the air inlet 9 and discharging the air in the housing 1 from the air outlet 3 in correspondence with No.
Is attached to the blade mounting board 28 arranged on the other opposing wall 5 side.