JPH0735436Y2 - Electronic cabinet cooling structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] An outdoor installation type cabinet having a structure for cooling an electronic device housed inside, for example, a repeater of a communication device, in which temperature rise inside the cabinet due to sunlight is minimized. Along with the purpose of providing a cabinet cooling structure that can effectively dissipate the heat generated inside to the outside and also has a simple structure, a plurality of block electronic units having a predetermined function are accommodated. In an electronic device that is mounted on a vertical frame of the cabinet and is further housed in a cabinet and installed outdoors, a horizontal partition plate is placed above the cabinet and below the cabinet ceiling over the entire surface. Exhaust provided by dividing the inside of the cabinet into an upper air chamber and a lower accommodating chamber, and providing an exhaust fan at at least one end of the air chamber. An opening is provided, a large number of fins are provided on the partition plate to project into both the air chamber and the storage chamber, and at least a part of the rack is configured as a duct with both upper and lower ends open, and the rack is mounted from the bottom of the cabinet. The outside air introduced into the lower end of the air passes through the rack and is discharged from the upper end into the air chamber, is sucked by the exhaust fan and flows along the fins of the partition plate, and is discharged to the outside of the cabinet through the exhaust port. Is configured to.

[Industrial application field]

The present invention relates to an outdoor installation type cabinet having a structure for cooling an electronic device housed inside, for example, a repeater of a communication device.

[Conventional technology and its problems]

An electronic device such as a communication device is installed outdoors by mounting a plurality of enclosures accommodating blocked electronic units having a predetermined function on a vertical rack and further accommodating the plurality of racks in a cabinet. There are cases. In order to keep the function of such an electronic unit normal, the temperature inside the cabinet needs to be cooled so as not to rise too much.

As an example of the conventional cooling system, the simplest one is, as shown in FIG. 6, provided a shading plate 2 on the upper part of a cabinet 1 for accommodating an electronic unit so that the sunshine does not affect the inside of the cabinet. It is preventing. Although this method can block heat from the outside, it has the drawback that the heat generated from the heat-generating components mounted in the accommodated unit cannot be efficiently radiated to the outside. It cannot be used when the mounting density of the component is high and the amount of heat generation is high.

As another method, as shown in FIG. 7, a cabinet 1
There is one in which the heat pipe 3 is installed by penetrating the wall surface of. According to this, the heat generated inside is absorbed by the portion 3a protruding inside the cabinet, travels through the pipe to reach the portion 3b protruding outside, and is released into the atmosphere, whereby the inside of the cabinet is released. It prevents the temperature from rising. However, in this method, there is a problem that a cover measure for the heat pipe protruding to the outside is required and the installation space of the cabinet is also limited.

The present invention solves the above-mentioned problems of the prior art, minimizes the temperature rise inside the cabinet due to sunlight, and can effectively dissipate the heat generated inside to the outside. It is intended to provide a simple cabinet cooling structure.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the present invention mounts a plurality of housings housing a blocked electronic unit having a predetermined function on a vertical rack, and further houses the housings in a cabinet to be installed outdoors. A cooling structure for a cabinet for electronic equipment, in which a horizontal partition plate is provided over the entire surface below the cabinet above the housing to divide the interior of the cabinet into an upper air chamber and a lower accommodation chamber. Then, in the cooling structure of the electronic device cabinet in which a large number of fins are provided on the partition plate and are projected in both the air chamber and the accommodation chamber, an exhaust port having an exhaust fan is provided in at least one of the air chambers, At least a part of the rack is configured in a duct shape that penetrates the accommodation chamber and connects the air chamber to the bottom of the cabinet, and guides convection of air to the ceiling of the air chamber. A convection guide plate is provided, and outside air introduced from the bottom of the cabinet to the lower end of the rack passes through the rack and is discharged to the air chamber from the upper end thereof, and is sucked by the exhaust fan and along the fins of the partition plate. It is characterized in that the convection guide plate is guided to flow and is discharged to the outside of the cabinet through an exhaust port.

[Action]

Since this cabinet has an air chamber in the ceiling,
This blocks the heat from the sun and does not affect the interior of the cabinet enclosure.

When the exhaust fan operates, the air in the air chamber is exhausted and the pressure in the chamber becomes negative.Therefore, outside air is introduced from the lower opening of the rack located at the bottom of the cabinet through the rack whose upper end is open. Inhaled. The cold outside air comes into contact with the fins of the partition plate while moving toward the exhaust port in the air chamber, and efficiently cools the fins whose temperature has risen due to heat generated from the electronic unit in the housing chamber and is exhausted.

Hereinafter, the present invention will be described in more detail with reference to the preferred embodiments shown in the drawings.

〔Example〕

FIG. 1 is a front view of the inside of a cabinet seen through to explain the principle of the present invention. Inside the box-shaped cabinet 10, there are a pair of vertical racks 11, 1 in the left and right areas, respectively.
2 are erected, and an electronic unit is housed therein, and a housing 13 is fixed by bolts and laminated. In fact, the first
Similar racks and housings are installed in the same cabinet 10 so that they are back to back with the racks and housings seen from the front in the figure (see FIG. 2).

Of the racks 11 and 12 of each pair, the rack 11 which is installed in the center of the cabinet is formed in a duct shape as shown in FIG. 3, and is a ventilation channel whose upper and lower ends are open. There is.

A partition plate 15 is provided below the top plate 14 of the cabinet 10 across the space above the housing 13 fixed to the rack, and the inside of the cabinet is provided with an upper air chamber 16 and a lower storage chamber 17. It is divided into and. The upper end of the rack 11 on the center side is in communication with the inside of the air chamber 16 so as to coincide with the opening of the partition plate 15.

Lattice-shaped exhaust ports 18 are provided on the side walls of the cabinets on both sides of the air chamber 16, and exhaust fans 19 are installed therein. The air chamber 16 is airtightly divided into left and right from the center by a partition wall 20. Also, from the upper edge of this partition wall 20, the exhaust port
Convection guide plate sloping upward toward 18
21 are provided.

As shown in FIG. 4, a plurality of fins 22 and 23, which are parallel to each other along the width direction of the cabinet 10, are vertically installed in parallel on the partition plate 15, and each fin 22 and 23 is an air chamber. 1
6 and the inside of the containment chamber 17.

The operation of the cabinet cooling mechanism of the present invention having such a configuration will be described.

First, since the air chamber 16 is formed in the upper part of the cabinet 10, the influence of sunlight on the accommodation chamber 17 in which the housing 13 of the electronic unit is housed is affected by the heat insulation effect of the air.
Shut off at 16.

Also, by the action of the inclined convection guide plate 21,
Even if the fan 19 is not operated, natural convection from the bottom of the cabinet through the air channel of the cabinet to the exhaust port 18 of the air chamber occurs, which promotes the cooling cycle described later.

When the fan 19 is operated, the air in the air chamber 16 is exhausted and the inside pressure becomes negative. Then, low temperature outside air is positively sucked from the bottom of the cabinet 10 through the air channel of the duct-shaped rack 11 communicating with the air chamber 16,
Introduced in 16. This cold air flows along the fins 23 protruding into the room, and after cooling it, the exhaust port 18
Emitted into the atmosphere. Since the heat is transferred to the cooled fins 23 from the fins 22 on the side of the containing chamber 17 that have become high temperature due to the heat generated inside, the temperature inside the containing chamber 17 is lowered.

Note that FIG. 5 is a cross-sectional view and a side view of the cabinet showing an example of the positions of the outside air intake port 24 and the exhaust port 18.

[Effect of device]

As described above, according to the present invention, an air chamber is formed by a partition plate in the upper part of a cabinet, an exhaust port with a fan is provided in this end region, and a rack for mounting a housing is further provided with an air channel. The cold outside air is supplied to the air chamber through this. Therefore, the heat generated in the storage chamber is transferred to the air chamber through the fins provided across the air chamber and the storage chamber, and is efficiently discharged to the outside together with the airflow.

Moreover, in the present invention, only the exhaust fan is provided and the intake fan is omitted, so that it is possible to prevent external dust and rainwater from entering the inside of the cabinet by the intake fan as in the conventional case.

[Brief description of drawings]

FIG. 1 is a front view of the cabinet of the present invention seen through, FIG. 2 is a sectional view taken along the line XX of FIG. 1, FIG. 3 is a perspective view of a duct rack, and FIG. 4 is a fin. Fig. 5 is a perspective view of a partition plate showing the shape of Fig. 5, Fig. 5 is a side view showing the position of the exhaust port of the outside air intake of the cabinet, and Fig. 6 and Fig. 7 are drawings showing the outline of the conventional cabinet cooling structure. is there. 10 …… Cabinet, 11 …… Duct rack, 12 …… Normal rack, 13 …… Housing, 14 …… Top plate, 15 …… Partition plate, 16 ……
Air chamber, 17 ... Accommodation chamber, 18 ... Exhaust port, 19 ... Fan,
20 ... Partitions, 21 ... Convection guide plates 22, 23 ... Fins.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Naoya Yamazaki 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Fujitsu Limited (56)

Claims (1)

[Scope of utility model registration request] 1. A plurality of enclosures (13) accommodating a blocked electronic unit having a predetermined function are vertically mounted on a vertical rack (11, 1).
A cooling structure for an electronic equipment cabinet, which is mounted on a cabinet (10) and is housed in a cabinet (10) to be installed outdoors, wherein the cabinet ceiling (14) is located above the casing (13). ), A horizontal partition plate (15) is provided over the entire surface to divide the inside of the cabinet into an upper air chamber (16) and a lower storage chamber (17), and the partition plate (15) has a large number of fins. (22,23) are installed in the air chamber (1
In a cooling structure for an electronic device cabinet that protrudes into both the chamber 6) and the accommodation chamber (17), an exhaust fan (19) is provided in at least one of the air chambers (16).
And an exhaust port (18) including the above, and at least a part of the rack (11) is formed into a duct shape that penetrates the accommodation chamber (17) and connects the air chamber (16) with the bottom of the cabinet (10). The convection guide plate that guides the convection of air is provided on the ceiling of the air chamber (16), and the outside air introduced from the bottom of the cabinet (10) to the lower end of the rack (11) passes through the rack and its upper end. From said air chamber (16)
To be discharged to the outside of the cabinet through the exhaust port (18) along with the fins (22) of the partition plate and guided by the convection guide plate. A cooling structure for an electronic device cabinet characterized by being configured.