KR100640067B1 - Device for cooling switching circuit of control box - Google Patents

Abstract

The present invention relates to a switching circuit cooling device of a control box, which can effectively cool the switching circuit built into the control box and prevent moisture from penetrating into the control box, thereby protecting the electrical equipment built into the control box. The aim is to reduce the overall size of the control box.

The apparatus according to the invention comprises: a heat pipe (2) installed in contact with the switching circuit at the bottom of the control box (1) in which the switching circuit (11) is incorporated; Heat transfer fins 3 in surface contact with the heat pipe; And, it comprises a cooling fan (4) installed adjacent to one side of the heat pipe and the heat transfer fins. In addition, according to the present invention, the heat transfer plate 31 may be further provided with surface contact with the switching circuit 11 and the heat pipe 2 is built-in, and the heat transfer fins 3 are integrally installed at the bottom thereof. have. Accordingly, since the heat transfer fins 3, the heat pipes 2, and the cooling fan 4 are installed outside the control box 1, the air blown by the cooling fan 4 flows into the control box 1. Since it does not flow in, moisture does not flow into the control box (1). In addition, instead of the heating fins 3, corrugated heating fins 3a may be installed.

Control box cooling, switching circuit cooling

Description

Switching circuit cooling device of control box {DEVICE FOR COOLING SWITCHING CIRCUIT OF CONTROL BOX}

1 is a perspective view showing the inside of a control box provided with a switching circuit cooling apparatus according to a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of the main part of FIG. 1. FIG.

3 is an enlarged cross-sectional view of main parts of a control box in which a switching circuit cooling apparatus according to Embodiment 2 of the present invention is installed.

4 is an enlarged cross-sectional view illustrating main parts of a control box in which a switching circuit cooling apparatus according to Embodiment 3 of the present invention is installed.

5 is an enlarged cross-sectional view illustrating main parts of a control box in which a switching circuit cooling apparatus according to a fourth exemplary embodiment of the present invention is installed.

6 is a perspective view illustrating the inside of a control box in which a conventional switching circuit cooling device is installed.

<Explanation of symbols for the main parts of the drawings>

1: control box, 2: heat pipe,

3: heating fin, 4: cooling fan,

11: switching circuit, 21: heat transfer rib of the heat pipe,                 

31: heat transfer plate, 33: notch of the heat transfer fin,

35: louver of electric heating fin

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching circuit cooling apparatus of a control box, and in particular, to effectively cool a switching circuit built in various control boxes installed in an electric vehicle and to prevent moisture from penetrating into the control box. It relates to a control circuit's switching circuit cooler that can protect the electronics inside and reduce the overall size of the control box.

In electric vehicles, control boxes are installed to control various functional parts. In addition, the electric heater is used in the electric vehicle because the engine coolant cannot be utilized, and a control box for controlling the electric heater or the electric compressor of the air conditioner for the electric vehicle is also required for the electric vehicle.

These control boxes contain not only a variety of electronics, but also switching circuits, which generate a lot of heat. As such, the heat generated by the switching circuit adversely affects the electrical components built into the control box, and thus a conventional cooling device is installed in the control box to cool the switching circuit.

The conventional switching circuit cooling apparatus, as shown in Figure 6, the heating fin 91 is installed on the bottom of the control box 7 so that the switching circuit 71 is placed on the upper surface, and the inside of the control box 7 A cooling fan 93 installed on one side wall of the control box 7 to blow air into the furnace; The air outlet 73 is provided on the wall surface of the control box 7 opposite to the side on which the cooling fan 93 is installed to discharge the air blown into the control box 7. Therefore, the heat generated from the switching circuit 71 is conducted to the heat transfer fins 91, and thus the heat to be conducted toward the heat transfer fins 91 is heat-exchanged with the air blown by the cooling fan 93, thereby causing the air outlet 73. It can be radiated through.

However, in the conventional switching circuit cooling apparatus as described above, since the external air is blown into the control box 7 through the cooling fan 93, the control box is prevented by moisture when the humidity of the external air is high. (7) adversely affects the electrical equipment contained in it, which may cause damage or malfunction. And since the cooling device is installed in the control box 7, the overall size of the control box 7 also increases.

The present invention can effectively cool the switching circuit embedded in the control box and prevent moisture from penetrating into the control box to protect the electronics embedded in the control box and to reduce the overall size of the control box An object of the present invention is to provide a switching circuit cooling device for a box.

In order to achieve the above object, the switching circuit cooling device of the control box according to the present invention, the plate-shaped heat pipe is installed and supported in contact with the switching circuit built in the control box at the bottom of the control box; A plurality of heat transfer fins having an upper end joined to a bottom surface of the heat pipe, and having a lower end portion having a serration shape and arranged at predetermined intervals by a plurality of notches; And a cooling fan supported at a lower portion of the control box so as to blow air toward and adjacent to one side of the heat pipe and the heat transfer fins.

In addition, instead of the heating fins, a plurality of louvers are formed on the aluminum plate, and corrugated heating fins curved in a wave shape may be used.

In addition, according to the present invention, the heat pipe may be embedded in a heat transfer plate installed in surface contact with a switching circuit at a lower portion of the control box, and the heat transfer fins may be integrally installed at predetermined intervals on a bottom surface of the heat transfer plate. .

In addition, in order to increase the heat dissipation effect, a plurality of protruding heat transfer ribs protruding toward the heat transfer fins may be further formed on the bottom surface of the heat pipe.

According to the switching circuit cooling apparatus of the control box according to the present invention configured as described above, the external air blown by the cooling fan is installed on the outside of the control box as well as the heating fan and the heating fins and heat pipes of the control box. It does not flow inside. Therefore, the electrical appliances contained in the control box are not exposed to moisture, thereby preventing the electrical appliances from being damaged or malfunctioning. In addition, since the cooling device is installed outside the control box, the inner space of the control box required for installation of the cooling device can be excluded, thereby making the control box compact. In addition, in the present invention, since a heat pipe having excellent heat conduction efficiency is added unlike the conventional art, heat efficiency generated in the switching circuit can be quickly and effectively radiated, thereby increasing the cooling efficiency of the switching circuit.

Other features and advantages of the present invention will become more apparent from the following detailed description of the embodiments based on the accompanying drawings.

<Example 1>

A switching circuit cooling apparatus of a control box according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 and 2.

Reference numeral 1 denotes a control box, and a switching circuit is provided at the bottom thereof. Here, the illustration of the other electrical appliances incorporated in the control box 1 is omitted.

According to the first embodiment, the heat pipe 2 is installed in the lower portion of the control box 1, that is, the bottom surface thereof, so as to be in surface contact with the switching circuit 11 installed in the control box 1. In order for the heat pipe 2 to be in surface contact with the switching circuit 11 so as to take out the heat generated from the switching circuit 11 to the maximum, the heat pipe 2 is formed in a plate shape like the shape of the switching circuit 11. In addition, it is preferable that the evaporation portion of the heat pipe 2 is in surface contact with the entire switching circuit 11.

On the other hand, a plurality of heat transfer fins 3 are provided on the bottom surface of the heat pipe 2 in a surface contact state with the heat pipe 2. The upper end of the heat transfer fin 3 is in surface contact with the bottom surface of the heat pipe 2 so that the heat conduction can be conducted by the heat pipe 2 transferred from the switching circuit 11 to the heat pipe 2 as much as possible. The serration shape is provided by a plurality of notches 33 so as to provide a passage of air blown by the cooling fan 4 to be described later and widen the contact area with the blower air to maximize the heat dissipation effect. Doing. Therefore, the heat generated from the switching circuit 11 is primarily conducted to the heat pipe 2 and the heat conducted to the heat pipe 2 is secondarily transferred to the heat transfer fins 3 so that the cooling fan 4 It can be radiated by the air blown by.

The cooling fan 4 controls air adjacent to one side of the heat pipe 2 and the heating fins 3 to blow the air toward the heating fins 3 to effectively dissipate the heat conducted to the heating fins 3 as effectively as possible. It is preferable that it is provided in the lower part (namely, bottom surface) of the box 1. The cooling fan 4 can be installed and supported in the center hole 43 of the bracket 41 attached to the bottom of the control box 1, so that when the cooling fan 4 is driven, the cooling fan 4 Since the heat of the switching circuit 11 conducting toward the heat transfer fins 3 through the heat pipe 2 is radiated by the air blown, the switching circuit 11 may be cooled.

In the first embodiment, the cooling fan 4 is not only installed outside the control box 1, but also the heating fins 3 and the heat pipe 2 are also installed outside the control box 1, so that cooling is performed. Since the air blown by the fan 4 cannot flow into the control box 1, moisture does not flow into the control box 1. As a result, the electrical components contained in the control box 1 are not exposed to moisture, thereby preventing the electrical components from being damaged or causing malfunction.

<Example 2>

The switching circuit cooling apparatus of the control box according to Embodiment 2 of this invention is demonstrated, referring FIG.                     

The switching circuit cooling device of the control box of the second embodiment has a plurality of aluminum plates on the aluminum plate instead of the heat transfer fins 3 provided on the bottom of the heat pipe in surface contact with the bottom of the switching circuit 11 in the first embodiment. Since the louver 35 is cut out and the corrugated heat transfer fin 3a curved into a wave is adopted, the remainder is made the same as in Example 1, and the same parts as in Example 1 are denoted by the same reference numerals. Its detailed description is omitted.

<Example 3>

A switching circuit cooling apparatus of a control box according to Embodiment 3 of the present invention will be described with reference to FIG. 4.

In the switching circuit cooling apparatus according to the third embodiment, the heat transfer plate 31 is further installed in the bottom (ie bottom) of the control box 1 in a surface contact state with the switching circuit 11 embedded in the control box 1. On the bottom of the heat transfer plate 31, as in the first embodiment, the heat transfer fins 3 having the lower end portion serrated by the plurality of notches 33 are integrally formed at predetermined intervals. Except that the heat pipe 2 is built in the heat transfer plate 31, the rest of the configuration is the same as that of the first embodiment.

Thus, the heat generated in the switching circuit 11 is first conducted to the heat pipe 2, secondly from the heat pipe 2 to the heat transfer fins 3, and to the heat transfer fins 3. The conducted heat can be radiated by the blowing air driven by the cooling fan 4.                     

Also in the third embodiment, the cooling fan 4 is not only installed outside the control box 1, but also the heating fins 3 and the heat pipe 2 are also installed outside the control box 1, so that cooling is possible. Since the air blown by the fan 4 cannot flow into the control box 1, moisture does not flow into the control box 1. As a result, the electrical components contained in the control box 1 are not exposed to moisture, thereby preventing the electrical components from being damaged or causing malfunction.

<Example 4>

With reference to FIG. 5, the switching circuit 11 cooling apparatus of the control box 1 which concerns on Example 4 of this invention is demonstrated.

The cooling circuit of the switching circuit 11 of the control box 1 of the fourth embodiment includes the protruding heat transfer ribs 21 projecting toward the heat transfer fins 3 on the bottom surface of the heat pipe 2 in the third embodiment. Since it is made similarly to Example 3 except having been formed in several more, the same part as Example 3 attaches | subjects the same code | symbol, and the detailed description here is abbreviate | omitted.

In the switching circuit cooling apparatus of the control box according to the present invention configured as described above, not only the cooling fan 4 is provided outside the control box 1, but also the heat transfer fins 3 and the heat pipes 2 are also provided. Since the air blown by the cooling fan 4 cannot be introduced into the control box 1 because the air is installed outside the control box 1, moisture does not flow into the control box 1. As a result, the electrical components stored in the control box 1 are not exposed to moisture, thereby preventing damage to the electrical components or causing malfunctions.

In addition, since the heat pipe 2 having excellent thermal conductivity is provided to cool the switching circuit 11 not only by the heat fins but also the heat pipe, the switching circuit 11 can be cooled quickly and effectively.

On the other hand, since the components for cooling the switching circuit 11 are all installed outside the control box 1, there is no need to provide a space for installing the cooling device inside the control box 1, so that the control box 1 Compactness is possible.

Claims (4)

A plate-type heat pipe (2) installed at the lower portion of the control box (1) in which the switching circuit (11) is built in surface contact with the entire switching circuit; A plurality of heat transfer fins 3 having an upper end joined to a bottom surface of the heat pipe and having a lower end part disposed at predetermined intervals by having a serration formed by a plurality of notches 33; And, And a cooling fan (4) supported at the bottom of the control box to blow air toward and adjacent to one side of the heat pipe and the heat transfer fins. The method of claim 1, The bottom of the control box 1 in which the switching circuit 11 is built is supported so as to be in surface contact with the entire switch circuit, and a heat pipe 2 is embedded therein, and a lower part of the bottom portion has a plurality of notches 33. The switching circuit cooling apparatus of the control box, characterized in that the plurality of heat transfer fins (3) formed by the serration formation is integrally formed at a predetermined interval. The method of claim 2, Cooling circuit of the switching box of the control box, characterized in that the bottom of the heat pipe (2) is further formed with a plurality of protruding heat transfer ribs (21) protruding and embedded toward the heat transfer fins (3). A plate-type heat pipe (2) installed at the lower portion of the control box (1) in which the switching circuit (11) is built in surface contact with the entire switching circuit; Corrugated heat transfer fins (3a) are cut to form a plurality of louvers (35) on the aluminum plate and bent in a wave shape so as to be in surface contact with the bottom surface of the heat pipe (2); And, And a cooling fan (4) supported at the bottom of the control box to blow air toward and adjacent to one side of the heat pipe and the heat transfer fins.

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