JPH10190269A - Heat radiator for electronic device casing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the reliability of an electronic device by protecting mounted electronic parts from the influence of such as various gas components and damp of external air taken for cooling operation, and by preventing deterioration by effectively radiating heat generated by the electronic parts. SOLUTION: A seal structured casing 10 in which various electronic parts are housed is provided. A heat exchanging part 20 exchanges internal air C heated by a heat generated by the electronic parts in the casing 10 for external air A or B and returns the internal air C after the heat exchange into the casing 10. The heat exchanging part 20 repeats the operation to radiate the heat while circulating the air. Although the external air A or B is directly taken into the casing 10 for cooling operation conventionally, the external air A or B is circulated only in the heat exchanging part 20 and is not taken into the casing 10. That is, various gas components such as corrosive gas and damp contained in the external air do not come into contact with the electronic parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat radiating device for a housing of electronic equipment.

[0002]

2. Description of the Related Art FIGS. 4 and 5 are longitudinal sectional views showing a fan device of an electronic apparatus housing disclosed in Japanese Utility Model Laid-Open Publication No. 3-41996 as a conventional example of this kind of heat radiating device, and a longitudinal section of an enlarged main portion thereof. FIG. The electronic device housing 1 has a heat generating portion 2 therein, and external air is taken in from a suction port 3 provided at a lower portion in the vertical direction of the housing 1 by rotation driving of the blower fan 6 to forcibly cool the heat generating portion 2. I do. The heat generated by the heat generating portion 2 is discharged to the outside through the discharge port 4 at the upper part of the housing 1 and is radiated. An air filter 5 is provided in the suction port 3 so as to remove dust in air to be taken in. Also,
In the housing 1, a control unit 7 is arranged, and the rotation drive of the blower fan 6 can be switched in the forward and reverse directions by a control signal from the control unit 7. That is, the external air A sucked from the suction port 3 is discharged from the discharge port 4, and the external air B sucked from the discharge port 4 is discharged from the suction port 3 by switching to the reverse rotation so that the air filter 5 is clogged. To prevent such.

[0003]

By the way, in the fan device described in the publications shown in FIGS. 4 and 5,
Since the external air A or B is taken directly into the housing 1 from the inlet 3 or the outlet 4, corrosive gas, moisture and the like are introduced through the air filter 5. In particular, in the case of an electronic device, various built-in components such as a circuit board are adversely affected by moisture and the like, and are deteriorated to cause a reduction in reliability. Therefore, in order to avoid such inconvenience, outdoor use is necessarily restricted.

[0004] On the other hand, since it does not have a function of circulating or stirring the heat generated in the heat generating section 2, a sufficient heat radiation effect cannot be obtained. As a result, there is a problem that heat accumulation occurs inside the housing 1.

Accordingly, a main object of the present invention is to protect mounted electronic components from the effects of various gas components and moisture in the external air taken in for cooling, and to effectively radiate heat generated by these electronic components to prevent deterioration. An object of the present invention is to provide a heat radiating device for an electronic device housing in which the reliability is improved by preventing the heat radiating device.

Another object of the present invention is to provide a heat radiating device for an electronic device housing which can be used outdoors by achieving the above main object.

[0007]

According to the present invention, there is provided a heat radiating device for an electronic equipment housing, wherein a housing in which various electronic components are housed inside a front surface closed by a cover, and internal air discharged from the housing are taken. And a heat exchange unit for circulating by repeatedly performing a heat exchange with the external air and returning the internal air after the heat exchange back into the housing.

[0008] In this case, the housing blocks the intrusion of the external air and allows only the internal air to flow. Further, in the heat exchange section, the external air flow path and the internal air flow path are formed, and the external air passing through each flow path and the internal air are brought into contact with each other to exchange heat.

With this configuration, instead of the conventional structure of taking in external air and cooling the electronic components in the housing, the internal air of the housing accompanied by heat generation of the electronic components is radiated by the heat exchange unit,
This is repeated to circulate. That is, since no external air is taken into the housing, the electronic components are not adversely affected by various gas components or moisture, and can be prevented from being deteriorated by heat generation.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a heat radiating device for an electronic device housing according to the present invention will be described in detail with reference to the drawings.

In FIGS. 1 and 2 showing a side sectional view and a plan view of the apparatus, a front opening side of a housing 10 housing electronic equipment is closed and sealed by a cover 11 via a packing member 12. In addition, a heat exchange unit 20 having a size and a shape that covers almost the entire surface is provided on the back side of the housing 10. An intake 2 for introducing external air A through an air filter 21 is provided below the heat exchange unit 20 in the vertical direction.
2 is provided, and an outlet 2 for discharging the external air A is provided at the upper part.
3 are provided. An external blower fan 24 is provided in the vicinity of the outlet 23, and is driven to rotate to discharge the outlet 23.
Thus, it is possible to block rainwater or the like from entering the heat exchange unit 20. As described later, the external fan 2
The switch 4 is capable of switching between forward and reverse rotations, and takes in the external air B from the discharge port 23 by switching, and discharges the external air B from the lower intake port 22 this time. Further, an air filter 25 is arranged outside the external blower fan 24.

FIG. 3 shows the internal structure of the heat exchange section 20. A plurality of heat sinks 27a, 27b,... Formed by bending a thin plate on the base 26 are provided.
27n are alternately combined to form a bag,
Internal air flow paths 28 and external air flow paths 29 are formed alternately between adjacent heat sinks. The external air passage 29 is taken in from either the lower intake port 22 or the upper discharge port 23 shown in FIG. It circulates and is discharged outside from either the intake port 22 or the discharge port 23. The internal air C of the housing 10 taken in is circulated through the internal air passage 28.
The heat can be exchanged with the external air A or B which flows through the external air passage 29. The entire flow path structure described above is covered with a cover 30.

Here, the apparatus comprises a housing 10 and a heat exchange section 20.
The outlet 13 and the return port 15 communicating with the internal air flow path 28 of the heat exchange unit 20 are provided in the lower part and the upper part of the partition wall 13 so as to open.
That is, the outlet 14 communicates with the upper upstream side in the figure of the internal air flow path 28 on the heat exchange section 20 side, and the return port 15 communicates with this lower downstream side. As a result, the internal air C in the casing 10 is transferred from the outlet 14 to the internal air passage 28 to the return port 15.
→ It can be circulated through the path inside the casing 10.

In the housing 10, a first internal fan 16 is disposed near the upper outlet 14 in order to circulate and agitate the internal air C, and the first internal fan 16 is located at a position relatively closer to the lower outlet 15. Two internal blowing fans 17 are arranged.

Further, inside the housing 10, on / off control of the rotation of the first and second internal blowers 16 and 17 including the external blower fan 24 on the heat exchange section 20 side, and switching of the forward / reverse rotation of each fan A control unit 18 for controlling the operation is mounted on the partition wall 13.

The components of the casing 10 and the heat exchange section 20 are sufficiently waterproofed for use outdoors.

Next, the operation and operation of the heat radiating device of this embodiment will be described.

Various electronic components such as a circuit board are incorporated in the housing 10 and the internal air C whose temperature rises due to the heat generated by the electronic components is supplied to the first and second internal fans 1.
Due to the rotational drive of 6, 17, the liquid is sucked and moved upward in the casing 10, and is sent from the outlet 14 to the internal air flow path 28 in the heat exchange unit 20.

In the heat exchange section 20, on the other hand, the external air A is taken in from the lower intake port 22 by the rotational driving of the external blower fan 24, flows in the external air flow path 29 in a wave-like manner, and flows through the upper air discharge path. It is discharged from the outlet 23 to the outside. On the other hand, the internal air C accompanying the heat sent from the housing 10 flows while moving up and down the internal air flow path 28 in a wave shape. At this time, heat is exchanged between the cool air of the external air A and the warm air of the internal air C by the action of the heat sinks 27a, 27b... 27n, and the internal air C is radiated.

The internal air C that has passed through the heat exchange section 20 is returned to the housing 10 again from the lower return port 15. The internal air C returned to the inside of the housing 10 again is sent to the heat exchange unit 20 from the upper outlet port 14 again with the heat generated by the electronic components. Such forced circulation by the blower fan drive is repeated, and the heat of the internal air 40 is constantly released to the outside and receives a cooling action.

As described above, the external air A taken into the heat exchange section 20 is not taken into the housing 10. In other words, adverse factors such as corrosive gas and moisture contained in the external air A are prevented from coming into contact with the electronic components in the housing 10, and the electronic components can be protected from deterioration.

The above operation is more effective from the following. The circulation and circulation of the internal air C and the external air A in the same direction easily causes clogging of the air filters 21 and 25. In order to prevent this, in the control unit 18, the first and second blower internal fans 16, at regular intervals during use over time or at regular intervals
A switching signal for switching the rotation from the normal rotation direction to the reverse rotation direction or from the reverse rotation direction to the normal rotation is sent to the external fan 17 and the external blower fan 24. Incidentally, after the switching, in the heat exchange section 20, the internal air B enters from the upper outlet 23 and is discharged from the lower inlet 22.

In this embodiment, the structure in which the heat exchanging section 20 is arranged on the rear side of the housing 10 is shown.
Of course, the present invention is not limited to the installation at the rear side position, but may be at both side surfaces of the housing 10.

[0024]

As described above, in the heat radiating device for an electronic device housing according to the present invention, external air is not taken into the housing, but is used for heat exchange with the internal air of the housing at the heat exchange section. Can be As a result, adverse factors such as corrosive gas and moisture contained in the external air are eliminated in advance and do not come into contact with the electronic components. Since the heat is dissipated, it is possible to prevent the electronic components from deteriorating, which is effective in ensuring the reliability of the device.

In addition, the present invention has the advantage that the above effects can be obtained and that it can be used outdoors.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a heat radiating device for an electronic device housing according to an embodiment of the present invention.

FIG. 2 is a plan view of the embodiment.

FIG. 3 is a partial cross-sectional front view showing a heat exchange unit of the present embodiment.

FIG. 4 is a longitudinal sectional view showing a conventional structure.

FIG. 5 is a partially enlarged longitudinal sectional view of the conventional structure.

[Description of Signs] 10 Case 11 Front cover 13 Partition wall 14 Internal air outlet 15 Internal air return port 16 First internal blower fan 17 Second internal blower fan 18 Control unit 20 Heat exchange unit 21 Air filter 22 External Air inlet 23 External air outlet 24 External blower fan 25 Air filter 27a to heat sink 28 Internal air flow path 29 External air flow path

Claims (7)

[Claims] 1. A housing in which various electronic components are stored inside a front surface of which is closed by a cover, and internal air discharged from the housing is taken in to exchange heat with external air. A heat exchange unit for circulating the internal air again by repeatedly returning the internal air to the inside of the housing. 2. The heat radiating device for an electronic device according to claim 1, wherein the housing is configured to cut off intrusion of external air and allow only internal air to flow. 3. The heat exchanging section has an external air flow path for circulating external air taken in from the outside and discharging the air to the outside, and circulating the internal air taken in from the housing and returning it to the inside of the housing again. 3. The device according to claim 1, further comprising an internal air flow path, wherein the external air flowing through the external air flow path and the internal air flowing through the internal air flow path are formed so as to be in contact with each other. 4. Heat dissipation device for electronic equipment housing. 4. The heat radiating device according to claim 3, wherein an air filter is provided at each of an upstream intake port and a downstream exhaust port of the external air flow path. 5. An intake port and an exhaust port of the external air flow path are provided at upper and lower positions in the vertical direction, and an external blower fan for sucking external air is provided at the intake port. Item 5. A heat dissipation device for an electronic device housing according to Item 4. 6. The air conditioner according to claim 1, wherein at least one internal blower fan for forcibly circulating the internal air through the heat exchanging section is provided inside the housing. A heat dissipating device for an electronic device casing according to any one of the preceding claims. 7. A control unit for switching the rotation of the external blower fan and the internal blower fan between forward and reverse rotations is provided inside the housing.
A heat dissipation device for an electronic device housing according to claim 1.