JPH0587298U - Blower motor unit and its control circuit device - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To reduce the size and weight of blower motor units and control circuit devices and improve water resistance. [Structure] A radiating fin housing a control circuit unit of a control circuit device is arranged inside a wind tunnel wall, a connecting terminal portion is arranged outside the wind tunnel wall, and a blower motor unit mounted on the wind tunnel wall and a radiating fin. The control circuit section is resin-sealed in the recess of
Also, a control circuit device in which the lid of the connection terminal and the elastic packing surface are pressed and fixed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a blower motor unit and its control circuit device.

[0002]

[Prior Art]

 Conventionally, a motor unit (hereinbelow, generically referred to as a blower motor unit) that blows or ventilates the wind tunnel wall by rotating an impeller or a fan with a motor has various structures. is there. Further, the motor rotation control device provided in the blower motor unit also uses voltage or current adjusting means by means of semiconductor control elements such as transistors.

(2) A conventional blower motor unit will be described with reference to the schematic structural diagram of FIG. 1 is a fan, 2 is a motor, 3 is a wind tunnel wall, 4 is a control circuit device for controlling 2, 4 -1 is a radiation fin of 4, 4-2 is a control circuit section of 4, 4-3 is of 4 This is the connection terminal section.

The motor 2 is driven by a power source (not shown), and the control circuit unit 4-2 of the control circuit device 4 adjusts the drive voltage or current of the motor 2 to control rotation. The control circuit unit 4-2, for example, as shown in the circuit diagram of FIG. 3, connects circuit components such as a semiconductor control element 5 including a transistor, a fuse 6, and a capacitor 7 to form a circuit module. is doing. Since the semiconductor control element 5 controls the electric power of the motor 2, it consumes a relatively large amount of electric power and requires a radiation fin.

However, in order to enhance the heat dissipation effect, the heat dissipation fins 4-1 are arranged inside the wind tunnel wall 3, that is, on the side of the air blower or ventilation passage, and outside of 3 the control circuit section 4-2 and the connection terminal section 4-. 3 is arranged and attached to the wind tunnel wall 3.

[0006]

[Problems to be solved by the device]

 The problems to be solved are further miniaturization, weight reduction and improvement of water resistance as compared with the conventional structure for the blower motor unit and its control circuit device in various applications including those for automobiles.

[0007]

[Means for Solving the Problems]

 According to the present invention, a heat radiation fin housing a control circuit unit of a control circuit device is arranged in a ventilation or ventilation passage, that is, inside a wind tunnel wall, and a connection terminal portion is arranged outside the wind tunnel wall and mounted on the wind tunnel wall. By doing so, the blower motor unit is configured, so that the heat radiation efficiency is improved, and the size and weight are reduced. Further, the control circuit section is resin-sealed in the recess of the heat radiation fin to improve water resistance. Further, the contact between the connecting terminal portion having the projection provided on the lid portion and the elastic packing having the input / output terminals embedded therein blocks the moisture intrusion path (3), thereby improving the reliability.

[0008]

【Example】

 FIG. 2 is a schematic structural view of a blower motor unit according to an embodiment of the present invention, in which the same reference numerals denote the same parts. That is, in the control circuit device 4 shown by the dotted line, the control circuit unit 4-2 is housed in the heat radiation fins 4-1 and is inside the wind tunnel wall 3, that is, in the ventilation or ventilation passage provided with the fan 1. Is installed in. A connection terminal portion 4-3 having an input / output terminal is installed outside the wind tunnel wall 3 and electrically connected to the motor 2. Therefore, the generated heat of the control circuit section 4-2, which is a power generation section provided inside the wind tunnel wall 3, can be effectively dissipated, so that the heat dissipation fin of the conventional structure of FIG. Can be achieved.

FIG. 4 is a front sectional structural view of the control circuit device 4 used in FIG. 2, and FIG. 5 is a sectional structural view of FIG. 4A-A. The printed wiring board 13 on which the semiconductor control element 5 and necessary components are mounted is housed in the recess of the heat radiation fin 4-1 and sealed with the resin 12. The input / output terminal 8 is also embedded in an elastic packing 9 made of rubber or the like, and the surface of 9 and the cover 14-1 of the case 14 of the connection terminal are pressed together, and the case 14 has screws 10 and The screws 11 fix the radiator fins 4-1 and the wind tunnel wall 3, respectively. Further, a protrusion 15 is provided on the lid portion 14-1 of the case 14, and the lid portion 14-1 is attached so that the protrusion 15 is pushed into the surface of the elastic body packing 9.

Therefore, the control circuit section 4-2 is sealed with the resin 12 and the protrusions 15 are pushed into the elastic body packing 9, whereby the sealing against water becomes sufficient and the water resistance is remarkably improved.

Even if the above embodiment is partially modified or other parts are added, it is included in the right of the present application within the scope of the gist of the present invention.

(4)

[Effect of the device]

 INDUSTRIAL APPLICABILITY As described above, the blower motor unit and its control circuit device of the present invention can be made compact, lightweight, and have improved water resistance, and thus can be widely used for automobiles, electronic devices, and other applications. The effect is extremely great.

[Brief description of drawings]

FIG. 1 is a schematic structural diagram of a conventional blower motor unit.

FIG. 2 is a schematic structural diagram of a blower motor unit showing an embodiment of the present invention.

FIG. 3 is a circuit diagram illustrating a control circuit unit.

FIG. 4 is a front cross-sectional structural diagram of a control circuit device.

5 is a sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 Fan 2 Motor 3 Wind Tunnel Wall 4 Control Circuit Device 4-1 Radiating Fin 4-2 Control Circuit Section 4-3 Connection Terminal Section 5 Semiconductor Control Element 6 Fuses 7 Capacitor 8 Input / Output Terminal 9 Elastic Body Packing (5 ) 10, 11 screw 12 resin 13 printed wiring board 14 4-3 case 14-1 14 lid part 15 protrusion

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H05K 7/20 J 8727-4E

Claims (3)

[Scope of utility model registration request] 1. A blower motor unit including a motor, an impeller or a fan, a wind tunnel wall, and a control circuit device. In a blower motor unit, a control circuit device including a semiconductor control element, a radiation fin, and a connection terminal portion. Among them, the blower motor characterized in that the control circuit device is mounted on the wind tunnel wall such that the heat radiation fin housing the control circuit portion is arranged inside the wind tunnel wall and the connection terminal portion is arranged outside the wind tunnel wall. unit. 2. A radiation fin having a recess, a control circuit portion sealed in the recess with a resin, an elastic body packing in which a terminal led out from the control circuit portion is embedded, and a connection terminal portion,
The control circuit device used in the blower motor unit according to claim 1, wherein the surface of the elastic body packing and the lid portion of the connection terminal portion are fixed by pressure contact. 3. The control circuit device according to claim 2, wherein a projection is provided on the lid portion of the connection terminal portion, and the projection is pressed into the surface of the elastic body to be pressed against it.