JP5897482B2 - Drip-proof air cooling structure - Google Patents

Description

  Embodiments described herein relate generally to a drip-proof air-cooled cooling structure for a casing.

  There are electronic devices such as sensors that are mounted on moving bodies such as the underside of aircraft and pylons, or attached to the outdoor structure of ships. When such an electronic device is mounted on a mobile body, it is a challenge to achieve both cooling of the electronic device and environmental resistance (particularly resistance to rain and salt water). With conventional equipment, the maximum possible components are placed inside the fuselage or ship.

International Publication No. 2010/004810

  When equipment placed outdoors is reduced as much as possible, cooling air and coolant are exchanged inside the aircraft, and environmental resistance is dealt with by reducing equipment placed outdoors in the aircraft. We want to prioritize the location of outdoor equipment to be arranged, with priority given to functions and performance, but there are restrictions on the choice of outdoor equipment to be placed because of considerations for cooling and environmental resistance. Is difficult to place.

  The embodiment has been made paying attention to the above circumstances, and provides a drip-proof air-cooling cooling structure for a casing that can improve the cooling performance and environmental resistance of an electronic device disposed inside the casing. It is in.

  According to the embodiment, the first partition wall that is separated into the device area and the cooling area in the housing, the heat sink that is provided integrally with the first partition wall and cools the electronic device, and the cooling A second partition wall disposed between the upper chamber and the lower chamber of the area. The upper chamber is provided with an inlet and the lower chamber is provided with an exhaust means. Further, a ventilation guide means provided on the second partition wall, for passing cooling air sucked into the upper chamber when the exhaust means is driven, along the heat sink, and guiding the air to the lower chamber side, and the lower chamber And an infiltration preventing means for preventing inundation from entering the inside of the housing from the outside.

The longitudinal cross-sectional view which shows the schematic structure of the whole drip-proof air cooling cooling structure of the housing | casing of 1st Embodiment. The perspective view of the principal part which shows the attachment part of the heat sink of the drip-proof air cooling cooling structure of the housing | casing of 1st Embodiment. The perspective view which shows typically the flow of the cooling air in the cooling area of the drip-proof air cooling structure of the housing | casing of 1st Embodiment. The cross-sectional view which shows the upper chamber of the housing | casing in the drip-proof air cooling cooling structure of the housing | casing of 1st Embodiment. The cross-sectional view which shows the lower chamber of the housing | casing in the drip-proof air cooling cooling structure of the housing | casing of 1st Embodiment. VI-VI sectional view taken on the line of FIG.

[First Embodiment]
(Constitution)
1 to 6 show a first embodiment. FIG. 1 is a longitudinal sectional view showing a schematic configuration of an entire drip-proof air-cooled cooling structure of a casing 2 mounted on a moving body, for example, an underside of a plane or a pylon, or attached to a body 1 such as an outdoor structure of a ship. . The housing 2 of the present embodiment is formed in a substantially box shape, the base plate 3 disposed on the upper surface in FIG. 1, the radome 5 disposed on the left surface in FIG. 1, and the other four surfaces A back plate 4a, a right side plate 4b, a left side plate 4c, and a cover 4 constituting a bottom plate 4d. The cover 4 and the radome 5 are fixed to the base plate 3 with bolts (not shown), for example, and are integrated as the housing 2. Further, the casing 2 is attached to the body 1 via a base plate 3 by bolting or the like (not shown).

  In the housing 2, a first partition wall 6 is provided that is erected along the vertical direction in FIG. 1. The first partition wall 6 is fixed by bolting or the like via, for example, an L-shaped fixing member 3a. The inside of the housing 2 is separated into two chambers by the first partition wall 6. Here, a device area 7 is formed between the radome 5 and the first partition wall 6, and a cooling area 8 is formed between the first partition wall 6 and the back plate 4 a.

  In the device area 7, for example, an electronic device 9 which is a radar device such as an antenna is accommodated. In the cooling area 8, a ventilation path (ventilation area) for passing cooling air for cooling the electronic device 9 in the device area 7 is formed. As shown in FIG. 2, the first partition wall 6 has a large number of thin cooling fins 10 protruding toward the cooling area 8 side. These cooling fins 10 extend in the vertical direction in FIG. 1 and are juxtaposed in a horizontal direction with an appropriate gap. Thereby, the heat sink 11 for cooling the electronic device 9 is provided integrally with the first partition wall 6.

  In the cooling area 8, the second partition wall 12 disposed along the horizontal direction cools the sucked outside air, which will be described later, and an upper chamber 13 serving as a region where the outside air is first sucked. A lower chamber 14 serving as an area for guiding and discharging as wind is formed. In the upper chamber 13 of the cooling area 8, an air inlet 15 is formed at a position away from the heat sink 11, for example, the back plate 4 a. The intake port 15 is provided with a louver 16. The louver 16 is provided with a plurality of slat-like rectifying plates 16 a that regulate the outside air sucked from the outside in the upward direction. Thereby, it has a structure in which it is difficult for outside air, for example, dust or water droplets, to enter the outside air sucked into the upper chamber 13 of the housing 2 from the outside.

  A blower (exhaust means) 17 for exhausting air from the inside of the lower chamber 14 to the outside is disposed at a position away from the heat sink 11 in the lower chamber 14 of the cooling area 8, for example, in the vicinity of the back plate 4 a. In the back plate 4a, a blower exhaust port 18 is formed at a portion facing the blower 17. Then, the exhaust discharged from the blower 17 is exhausted to the outside of the housing 2 through the exhaust port 18.

  Further, the second partition wall 12 is provided with air blowing guide means 19 for passing cooling air sucked into the upper chamber 13 along the heat sink 11 when the blower 17 is driven and guiding it to the lower chamber 14 side. . This air blowing guide means 19 is disposed outside the heat sink 11 in the lower chamber 14, and is provided substantially integrally with the guide plate 20 for allowing ventilation between the cooling fins 10 of the heat sink 11 and the second partition wall 12. And a box-shaped intake duct 21. In FIG. 1, the intake duct 21 is disposed on both sides of an upper surface plate 21 a disposed on the upper surface, a lower surface plate 21 b disposed on the lower surface, a front end surface plate (right end surface plate) 21 c disposed on the front end surface. And two side plates 21d and 21e (see FIG. 4). On the rear end surface (left end surface) of the intake duct 21, an opening 20 f is formed that communicates with the air passage between the heat sink 11 and the guide plate 20.

  Furthermore, a plurality of circular holes (second air inlets) 22 are formed in the two side plates 21d and 21e of the air intake duct 21, respectively. Thereby, the plurality of circular holes 22 of the intake duct 21 are opened in a direction not facing the intake port 15. When the blower 17 is driven, the cooling air sucked into the upper chamber 13 is sucked from the plurality of circular holes 22 of the intake duct 21 due to a negative pressure, and between the guide plate 20 and the cooling fins 10 through the openings 20f. Is supposed to lead to. The upper chamber 13 and the lower chamber 14 communicate with each other except for the portion where the intake duct 21 is disposed. As a result, a draining means 23 is formed which retains the outside air sucked into the upper chamber 13 from the louver 16 of the intake port 15 and drops water droplets contained in the outside air to the lower chamber 14 side.

  On the inner bottom portion of the lower chamber 14, a water immersion prevention means 24 for preventing water from entering the inside of the housing 2 from the outside is provided. As shown in FIG. 6, the infiltration prevention means 24 has a multi-stage structure, in this embodiment, two-stage floor plates 25 and 26 disposed on the inner bottom of the lower chamber 14. A gap 27 is formed between the floor plates 25 and 26. Further, a drain hole 25a is formed in the floor plate 25, and a lowermost drain hole 26a is formed in the floor plate 26 at the lowermost position. Here, the lowermost drainage hole 26a of the floor plate 26 at the lowermost position and the drainage hole 25a formed in the floorboard 25 other than the lowermost position are arranged at positions that do not face in the vertical direction. Thereby, when water enters the inside of the housing 2 from the lowermost drainage hole 26a of the floorboard 26 at the lowermost position, the water that has entered from the lowermost drainage hole 26a is formed in the floorboard 25 other than the lowermost position. Direct intrusion is prevented.

  Further, the floor plate 26 at the lowermost position is formed with an inclined surface 26b that is inclined with respect to the horizontal plane so that the lowermost drainage hole 26a is at the lowermost position. In addition, you may make it the structure which provides the inclined surface inclined with respect to the horizontal surface so that the drain hole 25a may become the lowest position in the floor boards 25 other than the lowest position.

(Function)
Next, the operation of the above configuration will be described. When the casing 2 of the present embodiment is used, the blower 17 is driven. By driving the blower 17, the air in the cooling area 8 is exhausted from the air outlet 18 to the outside of the housing 2. Thereby, since the inside of the cooling area 8 becomes a negative pressure, the outside air flows into the upper chamber 13 from the louver 16 of the intake port 15 as cooling air. At this time, the outside air flowing into the upper chamber 13 may be mixed with raindrops, salt water, etc., but the structure of the louver 16 may reduce the possibility of salt water or the like entering the upper chamber 13. it can.

  The cooling air flowing into the upper chamber 13 further flows into the intake duct 21 through the plurality of circular holes 22 of the two side plates 21d and 21e of the intake duct 21, and then cools with the guide plate 20 through the opening 20f. It flows between the fins 10. At this time, the heat sink 11 is cooled by the cooling air flowing between the guide plate 20 and the cooling fin 10. Thereby, the heat transferred from the electronic device 9 in the device area 7 to the heat sink 11 via the first partition wall 6 is cooled, and the electronic device 9 is cooled.

  Further, since the cooling air flowing into the upper chamber 13 flows into the intake duct 21 through the plurality of circular holes 22 of the two side plates 21d and 21e of the intake duct 21, a two-stage intake port is formed. ing. Since the outside air that has flowed into the upper chamber 13 from the louver 16 of the intake port 15 is not directly blown to the heat sink 11, it once stays in the upper chamber 13. Therefore, salt water or the like that has entered along with the outside air that is sucked in falls from the inside of the upper chamber 13 to the lower chamber 14 due to gravity, and is discharged from the drain hole 25a of the floor plate 25 and the lowermost drain hole 26a of the floor plate 26 at the lowermost position. It is discharged out of the housing 2.

  In addition, the cooling air that has cooled the heat sink 11 is exhausted from the air outlet 18 to the outside of the housing 2 by the blower 17. Since the blower 17 is always operated when the machine 1 is powered on, intrusion of salt water or the like from the exhaust port 18 is prevented.

  Further, the inundation preventing means 24 at the inner bottom of the lower chamber 14 has a two-stage structure, and a drain hole formed in the bottom drain hole 26a of the floor board 26 at the lowermost position and the floor board 25 other than the lowermost position. It is arrange | positioned in the position which does not oppose 25a with an up-down direction. As a result, water can be drained from the inside of the lower chamber 14 to the outside, but the housing 2 is externally provided through the bottom drain hole 26a of the floor plate 26 at the bottom level position and the drain hole 25a formed in the floor plate 25 other than the bottom level position. It is possible to prevent salt water from entering the interior. By combining the various structures described above, it is possible to cool the electronic device 9 in the device area 7 of the housing 2 and ensure environmental resistance.

(effect)
Therefore, the above configuration has the following effects. That is, the casing 2 of the present embodiment is forced air cooling using outside air, and the outside air is introduced into the cooling area 8 by driving the blower 17 provided in the cooling area 8 of the casing 2, and the inside of the equipment area 7 This is a drip-proof air-cooled cooling structure for cooling the electronic device 9. The inside of the housing 2 is divided into an equipment area 7 and a cooling area 8 so that raindrops, salt water, and the like cannot enter the cooling area 8 so that the equipment area 7 is not affected even if it enters. It has a structure for discharging.

  The first partition wall 6 that separates the device area 7 and the cooling area 8 is a base structure portion and a heat sink to which an electronic device 9 that is a heat generating member is attached on the device area 7 side, and a cooling fin 10 structure on the cooling area 7 side. This is the heat sink 11. Since the outside air introduced into the cooling area 8 is blown into the cooling fin 10 through the intake duct 21, the path from the electronic device 9, which is a heat generating component, to the cooling air is shortest, and a high heat dissipation effect can be expected.

  Therefore, by using the structure of the present embodiment, the housing 2 having the air cooling cooling structure can be disposed at a free place outside the airframe 1 or the ship. Further, it is not necessary to connect piping between the interior of the machine body 1 and the housing 2, and the scale of the apparatus can be reduced in accordance with the degree of freedom of arrangement. Moreover, although it has the cooling structure by external air introduction | transduction with an outdoor arrangement | positioning apparatus, it becomes possible to ensure high environmental resistance. Thereby, the drip-proof air cooling cooling structure of the housing | casing 2 which can improve the cooling performance and environmental resistance of the electronic device 9 arrange | positioned inside the housing | casing 1 can be provided.

  It is also preferable to provide a configuration that prevents salt damage by selecting parts, selecting materials, surface treatment, and the like.

  Although the embodiment of the present invention has been described, this embodiment is presented as an example and is not intended to limit the scope of the invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

    DESCRIPTION OF SYMBOLS 2 ... Housing | casing, 6 ... 1st partition wall, 7 ... Equipment area, 8 ... Cooling area, 9 ... Electronic equipment, 11 ... Heat sink, 12 ... 2nd partition wall, 13 ... Upper chamber, 14 ... Lower chamber, DESCRIPTION OF SYMBOLS 15 ... Intake port, 17 ... Exhaust means, 19 ... Air blow guide means, 24 ... Flooding prevention means

Claims (6)

A first partition wall that separates into a device area for storing an electronic device in a housing and a cooling area for passing cooling air that cools the electronic device;
A heat sink provided integrally with the first partition wall for cooling the electronic device;
A second partition wall disposed between the upper chamber and the lower chamber of the cooling area;
An air inlet disposed at a position away from the heat sink in the upper chamber of the cooling area;
An exhaust unit disposed at a position away from the heat sink in the lower chamber of the cooling area, and exhausting the outside from the lower chamber;
A ventilation guide means provided on the second partition wall, for blowing cooling air sucked into the upper chamber when the exhaust means is driven along the heat sink, and guiding the cooling air to the lower chamber side;
A drip-proof air-cooling cooling structure for a housing, comprising: an infiltration prevention means that is disposed at an inner bottom portion of the lower chamber and prevents water from entering the inside of the housing from the outside. The air inlet has a louver that adjusts the wind direction so that outside air sucked into the housing from the outside does not directly hit the heat sink,
The said upper chamber has a draining means to retain the external air suck | inhaled by the said upper chamber from the said inlet, and to drop the water droplet contained in the said external air to the said lower chamber side. Drip-proof air cooling cooling structure of the housing. The heat sink is provided with a large number of cooling fins extending in the vertical direction,
The air blowing guide means is disposed outside the heat sink in the lower chamber, and a guide plate for passing air between the cooling fins of the heat sink;
The second intake wall is provided integrally with the second partition wall and opens in a direction not facing the intake port, and the cooling air drawn into the upper chamber is used as the second intake air. The drip-proof air cooling cooling structure for a housing according to claim 1, further comprising: an air intake duct that sucks from a mouth and guides between the guide plate and the cooling fin. The inundation prevention means has a multi-stage floor plate disposed on the inner bottom of the lower chamber,
The lowermost drainage hole formed in the floor plate at the lowermost position and the drainage hole formed in the floorboard other than the lowermost position are arranged at positions that do not face each other in the vertical direction. Item 2. A drip-proof air-cooling cooling structure for a casing according to Item 1. The floor plate at the lowermost position has an inclined surface inclined with respect to a horizontal plane so that the lowermost drainage hole is at the lowest position,
The drip-proof air-cooling cooling of a casing according to claim 4, wherein the floor plate other than the lowest position has an inclined surface inclined with respect to a horizontal plane so that the drainage hole is at the lowest position. Construction. 2. The drip-proof air-cooling cooling structure for a casing according to claim 1, wherein the exhaust unit is a blower that blows air inside the lower chamber to the outside through an exhaust port on a wall surface opposite to the heat sink. .

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