JP4349624B2 - Panel heat exchanger - Google Patents

Description

  The present invention relates to a panel heat exchanger for preventing temperature rise due to heat generation of internal devices such as a distribution panel, a distribution panel, and a communication panel.

  2. Description of the Related Art Conventionally, panel heat exchangers that exchange heat with outside air have been widely used as means for preventing temperature rise due to heat generated by internal devices such as switchboards, distribution boards, and communication panels. For example, Patent Document 1 discloses a panel-mounted heat exchanger mounted on a panel, and a hood is mounted on an air intake / exhaust port of outside the panel on a cover that covers the outside.

  In such a panel for storing electrical equipment, increasing the depth and width is not preferred because it requires an installation area, but there is not much resistance to increasing the height in the height direction. In view of this, the panel heat exchanger is generally configured to be vertically long as shown in FIG. The conventional panel heat exchanger shown in FIG. 4 guides the panel air sucked by the fan 1 into the tube 3 of the heat exchange unit 2 and sucks the panel outside air from the panel outside air suction hole 4. The outside air sucked by the fan 5 is flowed to the outside of the tube 3 to exchange heat and discharged from the lower outside air exhaust port 6. The outside air suction hole 4 and the outside air exhaust port 6 are respectively provided with hoods 7 and 8 to prevent rainwater from entering.

  However, in such a conventional structure, the wall surface to which the air in the panel, which is guided by the fan 1 for sucking the air in the panel, hits the highest temperature, there is a problem that heat exchange is not performed in that part.

Further, in such a conventional structure, when installed outdoors, the outside air suction hole 4 and the outside air exhaust port 6 must be provided with hoods 7 and 8, respectively, and the appearance of the fan is not good. There was also a problem that the outside air suction hole 4 and the outside air exhaust port 6 were likely to leak to the outside.
JP 2003-152373 A

  The present invention has been made to solve the above-described conventional problems, and to provide a panel heat exchanger in which heat exchange is performed at portions other than the heat exchange unit to improve heat dissipation. Another object of the present invention is to provide a panel heat exchanger that does not require a hood even when installed outdoors and can reduce fan noise.

In order to solve the above-mentioned problems, the present invention provides a panel heat exchanger having a heat exchanging unit for exchanging heat between panel internal air and panel external air. A cover that can prevent rainwater is installed outside the case of the heat exchange unit that has a fan for sucking air outside the panel at the bottom, and covers the entire case. Between the case and the cover on the back of the partition plate against which the air inside the panel is guided, a flow path for the outside air that has passed through the heat exchange unit is formed, and heat is also transmitted through this partition plate in addition to the heat exchange unit. The structure is such that the replacement is performed , and the outside air suction hole is formed in the lower part of the cover at a position shifted downward from the position of the outside air suction fan .

The panel heat exchanger according to the present invention not only performs heat exchange between the air in the panel and the air outside the panel in the heat exchange unit, but also through a partition plate on which the air in the panel guided to the heat exchange unit by the fan hits. Can be done. For this reason, a heat exchange area can be expanded and the cooling capacity in a board can be improved. Also, if the entire device is covered by a cover that can prevent rainwater that is provided with outside air suction holes at a position shifted from the position of the outside air suction fan, it is not necessary to prevent rainwater from entering the duct. In addition to improving the appearance, a noise prevention effect can also be obtained.

Embodiments of the present invention will be described below.
FIG. 1 is a perspective view showing an appearance of an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view thereof. In these drawings, reference numeral 10 denotes a case of a panel heat exchanger, and 11 denotes a rainwater prevention cover that covers the entire case. As shown in FIG. 2, this panel heat exchanger is mounted outside the panel 12, such as a switchboard, distribution panel, communication panel, etc., and cools the panel. Both the case 10 and the cover 11 are made of a metal plate. .

  An upper partition wall 13 and a lower partition wall 14 are provided inside the case 10, and a heat exchange unit 15 including a large number of heat exchange tubes is vertically attached therebetween. Above the upper partition wall 13, there is a fan 16 for sucking air in the panel. The air in the panel warmed by the heat generated by the internal equipment is sucked and guided into the tube of the heat exchange unit 15. Return to. At this time, the upper part of the case 10 becomes the partition plate 22, and the air in the panel flows to the heat exchange unit 15 while being guided by the partition plate 22.

  A fan 17 for suctioning outside air is provided at the lower part of the case 10, and the outside air sucked from the outside air suction hole 23 at the lower part of the cover 11 flows into the outer space 18 of the tube of the heat exchange unit 15. Heat exchange is performed through the wall of the tube. A vent hole 19 is formed at a position corresponding to the upper portion of the heat exchange unit 15 of the case 10, and the outside air that has passed through the heat exchange unit 15 flows outward from the vent hole 19, and the case 10, the cover 11, Then, the air is exhausted from the outside air discharge hole 21 on the top of the cover 11.

  The heat exchanger for a panel of the present invention has such a structure, and heat exchange between the high-temperature panel air and the low-temperature panel air is performed by the heat exchange unit 15 to cool the inside of the panel. It is the same as the product. However, according to the present invention, the outside plate air flow path 20 is formed on the back surface (outside) of the partition plate 22 to which the high-temperature inside air sucked by the inside air suction fan 16 hits. The heat exchange between the hot air inside the panel and the air outside the panel is also performed through the air.

  The air inside the panel that hits the partition plate 22 has the highest temperature and a large temperature difference from the air outside the panel, so that the cooling effect is great. Therefore, according to the present invention, the heat exchange area can be increased more than before, and the cooling capacity in the panel can be increased. The partition plate 22 may be a flat plate, but the effect can be further enhanced by forming irregularities and fins to increase the heat transfer area.

Further, as in this embodiment, if the case 10 is entirely covered with the cover 11 having the outside air suction hole 23 at a position shifted downward from the position of the outside air suction fan 17, the conventional case 10 is used. Rainwater will not enter the interior without a hood. In addition, the noise of the fan 16 for sucking air outside the panel is prevented from leaking directly to the outside, and the noise can be reduced. In addition, since the cover 11 is provided with the outside air discharge hole 21 at a position shifted from the position of the vent hole 19 through which the outside air that has passed through the heat exchange unit 15 exits, the above-described effect is further improved.

  As a structure for attaching the cover 11 to the case 10, in this embodiment, a pair of projecting pieces 24 are provided at the upper end portion of the case 10, and the upper end portion of the cover 11 is bent so that these projecting pieces 24 can be locked. A piece 25 is formed. As shown in FIGS. 1 and 3, screws 26 are projected on both sides of the lower end of the case 10 with the heads facing outward. A dharma hole 28 into which the head of the screw 26 can be fitted is formed.

  Therefore, as shown in FIG. 3, first, the bent piece 25 at the upper end portion of the cover 11 is hooked on a pair of projecting pieces 24 formed at the upper end portion of the case 10, and the lower portion of the cover 11 is rotated in the direction of the case 10. Then, the Dalma hole 28 is aligned with the screws 26 on both sides of the lower end of the case 10, and the cover 11 is fitted. Then, a screwdriver 26 is tightened and fixed by inserting a screwdriver through a gap in the outside air suction hole 23 of the cover 11. If such an attachment structure is adopted, the screw 26 is not exposed to the outside, so that there is an effect of preventing mischief. Moreover, there is an effect that the cover 11 can be attached and detached with one touch.

It is a perspective view which shows the heat exchanger for boards of embodiment of this invention. It is a longitudinal section showing the heat exchanger for boards of the embodiment of the present invention. It is explanatory drawing of the attachment procedure of a cover. It is sectional drawing which shows the conventional heat exchanger for panels.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fan 2 Heat exchange unit 3 Tube 4 Outside air suction hole 5 Fan 6 Outside air exhaust 7 Hood 8 Hood 10 Case 11 Cover 12 Panel 13 Upper partition 14 Lower partition 15 Heat exchange unit 16 Fan 17 for suctioning air inside the panel External air suction fan 18 Tube outer space 19 Ventilation hole 20 Channel 21 External air discharge hole 22 Partition plate 23 External air suction hole 24 Projection piece 25 Bending piece 26 Screw 27 Flat plate 28 Dalma hole

Claims (1)

In the panel heat exchanger equipped with a heat exchange unit that exchanges heat between the air inside the panel and the air outside the panel, a fan for sucking air inside the panel is provided at the top, and a fan for sucking air outside the panel is provided at the bottom. A cover that prevents rainwater is installed outside the case of the heat exchange unit to cover the entire case, and the case on the back side of the partition plate that is exposed to the air inside the panel that is guided to the heat exchange unit by the fan for sucking air in the panel between the cover, forming a flow path for outside panel air passing through the heat exchange unit, even through the partition plate in addition to the heat exchange unit and a structure to perform heat exchange, and in the lower part of the cover A panel heat exchanger characterized in that an outside panel air suction hole is formed at a position shifted downward from the position of the outside panel air suction fan .

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