KR19980015686U - Blower Motor Control - Google Patents

Abstract

The present invention relates to a control apparatus of a blower motor, and a support frame (1) formed with four grooves in order to solve the separation of the PTC element due to the vibration of the blower motor and insufficient cooling capacity of the PTC resistance element, and one One circular PTC resistor element 3 having resistance value R1, one circular PTC element 5 divided into two parts, each having different resistance values R2 and R3, and a part protruding from the lower end. The first terminal 11 and the second terminal 13 respectively inserted into the support frame 1 and connected to the selection switch S / W and connected to each other through the PTC resistance elements 3 and 5 at the upper end thereof. ), The third terminal 15 and the fourth terminal 17, upper and lower radiating fins 21 and 23 for dissipating heat generated by the PTC resistors 3 and 5 to the outside, and the two circles An upper insulating plate 31 for inserting and fixing the PTC resistance elements 3 and 5 to the formed portion, and the first terminal 11 to 4th terminal 17 and the lower insulation plate 33 which insulates the said lower heat sink 23, and the said 1st terminal 11-the 4th terminal 17 and the upper and lower insulation plates 31 It provides a control device of the blower motor consisting of clips (41, 43) for fastening the upper and lower heat sinks (21, 23) between the upper and lower sides, with the (33) in between.

Description

Blower Motor Control

1 is a partial perspective view of the present invention,

2 is a cross-sectional view of the present invention,

3 is an assembly view of the present invention,

4 is a circuit diagram for explaining the present invention.

* Description of the symbols for the main parts of the drawings *

1: Support frame 3, 5: PTC resistance element

11: first terminal 13: second terminal

15: third terminal 17: fourth terminal

21: upper heat radiation fin 23: lower heat radiation fin

31: upper insulation plate 33: lower insulation plate

M: Blower Motor S / W: Selection Switch

V: power

The present invention relates to a control apparatus of a blower motor, and more particularly, to a control apparatus of a blower motor for controlling the rotational speed of a blower motor using a PTC (Positive Temperature Coefficient) resistor.

Conventionally, a control device composed of a coil resistor, a selection switch, and a fuse is used to rotate the rotational speed of the blower motor in four modes: low, medium, high, and high. However, when the blower motor is used for a long time, the coil resistance exceeds a predetermined temperature, thereby shortening the coil resistance itself or the fuse, thereby shortening the life of the control device. In order to solve this problem, a control device having a vertical arrangement of PTC resistors has been developed. There was a problem that a malfunction occurs in the control device due to insufficient cooling.

Accordingly, an object of the present invention is to solve the above problems, and by arranging the PTC resistors horizontally and fixing them with an insulating plate and a clip, a blower motor which prevents the PTC resistors from being separated by vibration generated from the outside. To provide a control device.

Another object of the present invention is to provide a control apparatus of a blower motor having improved cooling capacity by installing heat dissipation fins on upper and lower portions of a PTC resistance element.

Another object of the present invention is to provide a blower motor control apparatus which reduces the number of parts of a product and simplifies the process to improve productivity.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figs. 1 to 4, the present invention is a control device for a blower motor, comprising a support frame 1 having four grooves and one circular PTC resistor having one resistance value R1. The element 3, one circular PTC element 5 divided into two parts, each having different resistance values R2 and R3, and a portion protruding from the lower end are respectively inserted into the support frame 1 and selected. The first terminal 11, the second terminal 13, the third terminal 15 and the fourth terminal connected to the switch S / W and connected to each other through the PTC resistance elements 3 and 5 at the upper end thereof. (17), upper and lower radiating fins (21, 23) for dissipating heat generated by the PTC resistors (3, 5) to the outside, and the PTC resistors (3, 5) ) Is an upper insulating plate 31 for inserting and fixing the insulating layer, and a lower insulating plate for insulating the first terminal 11 to the fourth terminal 17 and the lower heat dissipation fin 23. Clip for fastening the upper and lower heat dissipating plates 21 and 23 with the upper plate 33 and the first terminal 11 to the fourth terminal 17 and the upper and lower insulating plates 31 and 33 therebetween. (41, 43).

Referring to the operation, effects of the present invention configured as described above in detail.

Usually, when the selector switch S / W is connected to the OFF terminal OFF, the blower motor M does not rotate. When the selection switch S / W is connected to the lowest mode terminal LO, a blower motor is connected to the resistor R1 and the second terminal 13 of the first terminal 11 and the PTC resistor 3. When a current is applied to (M) and the blower motor M is rotated at the minimum speed and connected to the mid-low mode terminal ML, the resistance R2 of the first terminal 11 and the PTC resistance element 5 and A current is applied to the blower motor M through the third terminal 15 so that the blower motor M rotates at a medium to low speed. In addition, when the selection switch S / W is connected to the used mode terminal MH, the blower motor M is provided through the resistor R3 and the fourth terminal of the first terminal 11 and the PTC resistor 5. When the blower motor (M) is rotated at a high speed by using a low current, and connected to the highest mode terminal (HI), the power supply (V) is directly applied to the blower motor (M), and the blower motor (M) is operated at the highest speed. Rotate

As described above, according to the present invention, by using an insulation plate and a clip for inserting and insulating the PTC resistance element, it is possible to prevent the PTC resistance element from being separated from the strong vibration generated from the outside, and the blower motor (M). ) For a long time, the heat generated by the PTC resistance element is sufficiently cooled by the upper and lower radiating fins (21, 23), there is an effect that can prevent the malfunction caused by the control device. In addition, since the resistor is used as the ceramic PTC, it is possible to improve the productivity of the product by reducing the parts used and simplifying the process than the coil resistance type device.

As mentioned above, although the Example of this invention was described, it can change into various forms, unless the summary of this invention departs.

Claims (1)

In the control apparatus of the blower motor, A support frame 1 having four grooves, one circular PTC resistance element 3 having one resistance value R1, and one having two resistance portions R2 and R3 divided into two parts. Circular PTC elements 5 and portions protruding from the lower ends thereof are respectively inserted into the support frame 1 and connected to the selection switch S / W, and are connected to each other through the PTC resistance elements 3 and 5 at the upper ends thereof. An upper part for dissipating heat generated from the connected first terminal 11, second terminal 13, third terminal 15, and fourth terminal 17 and the PTC resistance elements 3 and 5 to the outside. And lower insulating fins 21 and 23, an upper insulating plate 31 for inserting and fixing the PTC resistance elements 3 and 5 to a portion where two circles are formed, and the first terminals 11 to 4th. A lower insulating plate 33 which insulates the terminal 17 and the lower heat dissipation plate 23, and between the first terminal 11 to the fourth terminal 17 and the upper and lower insulating plates 31 and 33. two The control device of the blower motor is configured for the upper and lower heat sinks (21, 23) by a clip (41, 43) for fastening at the top and bottom.