JP2000236647A - Heat-dissipating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a heat-dissipating device which is made small and lightweight, when heat from circuit components including a heat generating element is forcibly dissipated. SOLUTION: A plurality of radiating fins 2 are installed so as to protrude side by side and protruding from a control case 1, in which circuit components which include a heat generating element are housed. A fan motor 6 is arranged to overstride both sides, on one side of the radiating fins 2 and on the control case 1. In addition, airstream from the fan motor 6 is guided in the direction of a heat dissipating device via an air guide 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat radiator used for a motor control device, and more particularly to a forced radiator using a fan motor.

[0002]

2. Description of the Related Art In a motor control device having a circuit component including a heat-generating element, forcible heat radiation using a fan motor in relation to the heat generation of the element or the size and weight of the apparatus. In many cases, means are provided.

FIG. 4 shows the structure of a conventional heat radiating device. A control case 11 containing circuit components including heat-generating elements has a radiator 13 having a plurality of radiating fins 12 arranged on one surface thereof. .

[0004] Both (up and down in this example) between the radiation fins 12 are open.
4 are installed. Air holes 15 through which cooling air flows are also formed on the upper and lower surfaces of the control case 11.

The heat generated from the heat-generating elements is partially cooled by the outside air flowing naturally through the control case 11 through the air holes 15, but most of the heat is conducted to the radiating fins 12 of the radiator 13. , Which are dissipated by the wind from the fan motor 14 flowing therethrough.

[0006]

However, in the above-mentioned conventional structure, the forced heat radiation efficiency using the fan motor 14 is poor, and in order to compensate for this, the heat radiator 13 is inevitably large, and the heat radiation device is reduced in size and weight. There was a problem.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a heat radiating device which enhances forced heat radiation efficiency and promotes reduction in size and weight.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a control case containing a circuit component including a heat-generating element, and a plurality of radiating fins juxtaposed from the control case. A radiator, and a fan motor arranged over both sides of the radiator and the control case;
An air guide for guiding the wind from the fan motor toward the radiator is provided.

Therefore, the air from the fan motor is guided by the air guide and is effectively guided by the radiator.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides a control case containing circuit components including heat-generating elements, a radiator having a plurality of radiating fins juxtaposed from the control case, and a radiator of the radiator. It is provided with a fan motor disposed over both one side and the control case, and an air guide for guiding wind from the fan motor toward the radiator.

The ventilation passages between the radiating fins are both open to have an air inflow side and an air outflow side, and a part of the fan motor corresponds to a part of the air inflow side.
Further, the air inflow side that is not associated with the fan motor is closed by a shielding means.

In the above configuration, the air from the fan motor is guided by the air guide and is effectively guided by the radiator to enhance the heat radiation effect, and the fan motor is installed over both the one side of the radiator and the control case. As a result, the overall shape can be reduced even though a sufficient air volume can be obtained.

In the ventilation path between the heat radiation fins, the air inflow side, which is not associated with the fan motor on the air inflow side, is closed by the shielding means, so that the forced cooling air flows through all the space between the fins to reduce the heat radiation effect. Enhance.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1 to FIG. 3, a plurality of radiating fins 2 are juxtaposed from a control case 1 in which a circuit component (not shown) including a heat-generating element is housed in parallel to form a radiator 3. I have.

The upper and lower ventilation passages 4 are open to the atmosphere, with the lower side serving as an air inlet and the upper side serving as an air outlet. The ventilation path 4 between the radiating fins 2 is closed by a shielding member 5 on the front surface.

The upper and lower lengths of the heat radiation fins 2 are shorter than those of the control case 1, and the upper ends thereof are set at substantially the same height.
Therefore, the position of the lower end portion of the radiation fin 2 is located above the control case 1 by a predetermined amount.

Numeral 6 denotes a fan motor provided opposite to a part of the lower ends of the plurality of radiating fins 2 and a part of the lower end of the control case 1, that is, both fan fins 2 and the control case 1. An air guide 7 for guiding air in the direction of the radiation fins 2 is provided.

At the lower ends of the plurality of radiating fins 2 not facing the fan motor 6, shielding means 8 are provided at intervals.

Numeral 9 denotes a natural convection air hole formed in the fin.

In the above configuration, the air sent from the fan motor 6 flows through the ventilation path 4 between the radiating fins 2 directly or guided by the air guide 7,
Heat dissipation from Of course, natural air convection causes the outside air to flow into the control case 1 to release heat.

Such heat dissipation prevents the circuit components in the control case 1 from being overheated, and always exerts a good function.

Further, since the shielding means 8 is provided at the lower end side of the plurality of radiating fins 2 not opposed to the fan motor 6, the air from the fan motor 6 does not escape downward so that the space between the radiating fins 2 can be reduced. Flows through the ventilation path 4 of the airbag.

Therefore, even if the whole of the radiating fins 2 and the fan motor 6 do not correspond to each other, the air flows through the ventilation passage 4 as a whole and exerts a reliable heat radiating action.

[0025]

As is clear from the above embodiment, in the present invention, since the fan motor is installed over both the radiator and the control case, it is possible to achieve both a reduction in size and weight as a radiator and an improvement in the radiation efficiency. In addition, the air inflow side, which is not compatible with the fan motor, is closed by the shielding means, so that the entire heat is dissipated, and further miniaturization can be promoted.

[Brief description of the drawings]

FIG. 1 is a perspective view of a heat dissipation device showing an embodiment of the present invention.

FIG. 2 is a front view of the apparatus.

FIG. 3 is a side sectional view of the control.

FIG. 4 is a perspective view of a conventional heat dissipation device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control case 2 Heat radiation fin 3 Heat radiator 4 Ventilation path 6 Fan motor 7 Air guide 8 Shielding means

Claims (2)

[Claims] 1. A control case containing a circuit component including a heat-generating element, a radiator having a plurality of radiating fins juxtaposed so as to protrude from the control case, and one side of the radiator and the control case. A heat dissipating device comprising: a fan motor disposed on both sides; and an air guide for guiding wind from the fan motor toward the radiator. 2. A ventilation path between each of the radiating fins is open at both sides to have an air inflow side and an air outflow side, and a part of the fan motor corresponds to a part of the air inflow side. The heat radiating device according to claim 1, wherein the air inflow side of the non-corresponding relationship is closed by a shielding means.