JP2012059975A - Electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus capable of sufficiently protect electronic components inside a housing from effects of heat.SOLUTION: With an electronic apparatus, a housing 1 includes a cylindrical body 4 that is rotatably supported about a vertical center axis. One or a plurality of openings is provided on the bottom part of the housing 1. The cylindrical body 4 is provided with a plurality of openings that surround the center axis and penetrate from inside to outside and a plurality of blades 41 that cover each opening, project outward, and have a predetermined angle against the rotation direction of the cylindrical body 4. The cylindrical body 4 is connected to a drive mechanism that rotates and drives the cylindrical body 4 about the center axis.

Description

  The present invention relates to an electronic apparatus such as a radio base station.

Conventionally, in wireless base stations for outdoor use, electronic circuits and power supply circuits for wireless communication are accommodated in a rectangular parallelepiped casing having a waterproof structure, and electronic components inside the casing are installed in rainwater or the like. Protects against the effects of moisture.
In such a base station casing structure, excellent heat dissipation is also required so that the electronic parts are not damaged by heat generated by the electronic parts inside the casing or by temperature rise due to solar radiation.

In view of this, a housing structure for an outdoor base station has been proposed in which a light shielding plate for blocking sunlight is installed at an appropriate interval on the surface of the housing facing the solar radiation direction (Patent Document 1).
According to the housing structure, it is possible to reduce the size and quantity of the heat dissipating fins that are conventionally provided on the surface of the housing, thereby reducing the size and weight of the housing.

JP 2000-4999999 A

However, since these casing structures have a sealed structure to ensure waterproofness, even when the heat sink fins and light shielding plates are installed, for example, when the outside air temperature rises rapidly, The temperature rises quickly, and in some cases, the electronic components inside the housing may be damaged by overheating.
Accordingly, an object of the present invention is to provide an electronic device that can sufficiently protect an electronic component inside a housing from the influence of heat.

  In the electronic apparatus according to the present invention, the casing (1) includes a barrel (4) supported so as to be able to rotate around a vertical central axis, and one or a plurality of openings are formed at the bottom of the casing (1). The cylinder (4) is provided with a plurality of openings surrounding the central axis and penetrating from the inside to the outside. The cylinder (4) projects outward while covering each opening. And a plurality of blades (41) having a predetermined angle with respect to the rotating direction, and a driving mechanism for rotating the barrel (4) about the central axis. Are connected.

  According to the electronic apparatus of the present invention, a pressure difference is generated in the air around the blade (41) due to the movement of the blade (41) accompanying the rotation of the cylinder (4). Air in the body (1) is discharged, and air is sucked into the housing (1) from the other opening, so that an air flow is generated inside the housing (1). 1) The electronic components inside are cooled.

  In a more specific aspect, the casing (1) includes a barrel (4) supported so as to be rotatable about a vertical central axis, and one or a plurality of intake ports are provided at the bottom of the casing (1). (32) is established, and the cylinder (4) is provided with a plurality of exhaust ports (42) surrounding the central axis and penetrating from the inside to the outside. A plurality of blades (41) projecting outward while covering and having a receding angle with respect to the rotational direction of the barrel (4) are projected, and the barrel (4) is inserted into the barrel (4). A drive mechanism that rotates around the central axis is linked.

  In the electronic device, a pressure difference is generated in the air around the blade (41) due to the movement of the blade (41) accompanying the rotation of the barrel (4), and accordingly, the casing ( 1) Air in the interior is discharged and air is sucked into the housing (1) from the air inlet (32), and an air flow is generated inside the housing (1). 1) The electronic components inside are cooled.

  Further, the exhaust port (42) is covered with the blade (41), and the rainwater adhering to the blade (41) is repelled with the rotation of the trunk cylinder (4). Further, since air constantly flows from the inside to the outside of the exhaust port (42), rainwater does not enter the housing (1) from the exhaust port (42).

In a specific aspect, the drive mechanism is connected to a control circuit that controls the rotation of the barrel (4) based on detection of the temperature in the casing (1). As the temperature rises, the rotational speed of the barrel (4) is increased.
According to this specific aspect, the rotational speed of the barrel (4) increases as the temperature in the casing (1) increases, and the velocity of the air flowing in the casing (1) increases accordingly. As a result, a larger cooling effect is generated, and the temperature rise of the electronic component in the housing (1) is suppressed.

  The electronic device according to the present invention can sufficiently protect the electronic components inside the housing from the influence of heat.

FIG. 1 is a front view of an outdoor installation type electronic apparatus according to an embodiment of the present invention. FIG. 2 is a bottom view of the outdoor-installed electronic device. FIG. 3 is a vertical sectional view of the outdoor-installed electronic device. 4 is a cross-sectional view taken along line AA in FIG. FIG. 5 is a partially cutaway perspective view of the outdoor-installed electronic device. FIG. 6 is an exploded perspective view of the outdoor-installed electronic device. FIG. 7 is an exploded perspective view of the outdoor electronic device viewed from a direction different from FIG.

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings.
As shown in FIGS. 1 to 3, an outdoor-installed electronic device according to an embodiment of the present invention includes a cylindrical housing (1), and the housing (1) includes a trunk (4), The upper cover (2) disposed above the trunk cylinder (4) and the lower lid (3) disposed below the trunk cylinder (4) are configured. As will be described later, the trunk cylinder (4) Is free to rotate around its central axis.
The upper lid (2) and the lower lid (3) are respectively provided with flanges (21) and (31), and the casing (1) is attached to the wall surface etc. using these flanges (21) and (31). Is possible.

On the bottom surface of the lower lid (3), as shown in FIG.
Further, as shown in FIGS. 4 and 5, the cylinder (4) is provided with slit-like exhaust ports (42) extending in the vertical direction so as to surround the central axis at a plurality of positions at a constant angular pitch. At the same time, a plurality of blades (41) projecting outward from the opening edge of each exhaust port (42) and having a receding angle with respect to the rotation direction B of the barrel (4) are provided.

  Here, the plurality of blades (41) are provided in the exhaust ports (42) so that rainwater does not enter the housing (1) from the exhaust port (42) during rainfall even when the trunk tube (4) is stopped. An exhaust passage that covers from the periphery and extends spirally from each exhaust port (42) along the blade (41) in the outer peripheral direction is formed.

  As shown in FIG. 5, the upper lid (2) can be rotated relative to the upper part of the barrel (4) with a slight gap so that rainwater does not easily enter from the gap. The lower lid (3) is engaged with the lower part of the barrel (4) so that it can be rotated relative to the lower part of the cylinder (4) with a slight gap so that rainwater does not easily enter from the gap. Match.

As shown in FIGS. 5 to 7, a guide plate (22) is suspended in a horizontal posture inside the upper lid (2), and the motor (7) is horizontally mounted on the guide plate (22). The gear (71) is connected to the output shaft of the motor (7).
Inside the lower lid (3), a duct (5) for guiding the air sucked from the air inlet (32) to the central portion of the inner space of the barrel (4) is installed at the center position. .
The bottom of the duct (5) is fastened to the lower lid (3).

A chassis (8) extending along a vertical plane is disposed in the inner space of the barrel (4), and a horizontal disk portion (81) is formed at the upper end of the chassis (8). The disc portion (81) is fixed to the back surface of the guide plate (22). The upper part of the duct (5) is connected to the lower end part of the chassis (8).
A first board (9) and a second board (93) are fixed on both sides of the chassis (8), and a power supply module (90) and an IC chip (92) are mounted on the first board (9). A temperature sensor (94) is provided on the second substrate (93). The IC chip (92) of the first substrate (9) incorporates a control circuit for controlling the rotation of the motor (7) as will be described later.

  A bearing (6) is interposed between the disc portion (81) of the chassis (8) and the upper plate (43) of the cylinder (4), and the chassis (8) and the cylinder are interposed by the bearing (6). (4) are connected to each other so as to be relatively rotatable. In this state, the gear (71) meshes with a rack portion (not shown) formed on the surface of the barrel (4).

Therefore, when the motor (7) rotates, the rotation is transmitted to the rack portion of the barrel (4) via the gear (71), and thereby the barrel (4) is rotationally driven. Here, the upper cylinder (43) is guided by the guide plate (22), so that the barrel (4) rotates without shaking around the vertical central axis.
On the other hand, the chassis (8), the first substrate (9), and the second substrate (93) installed in the internal space of the barrel (4) are kept stationary.

The rotation of the motor (7) is controlled by the aforementioned control circuit mounted on the first substrate (9) based on the temperature in the housing (1) detected by the temperature sensor (94).
That is, the rotational speed of the motor (7) is increased as the temperature in the casing (1) increases, and the rotational speed of the motor (7) is decreased as the temperature in the casing (1) decreases.

  When the barrel (4) rotates clockwise (B direction) by the rotation of the motor (7), the movement of the blade (41) causes a pressure difference in the air around the blade (41). 5, the air in the housing (1) is exhausted from the exhaust port (42), and the air is sucked into the housing (1) from the air inlet (32), Inside the housing (1), there is an air flow rising from the duct (5) to the central portion of the internal space of the barrel (4) and an air flow that diffuses from the central portion of the internal space of the trunk (4) to the outer periphery. Occurs.

Here, the air in the housing (1) is heated by the heat generation of the electronic components on the first board (9) and the second board (93) in the housing (1). ) Is sucked in cold air, and the cold air is intensively blown through the duct (5) to the first substrate (9) and the second substrate (93). It will be cooled effectively. The air heated by the heat generated by the electronic component is discharged from the exhaust port (42) to the outside of the housing (1), whereby the air temperature in the housing (1) is kept substantially constant.
In this way, overheating of the electronic components in the housing (1) is prevented.

Moreover, in the outdoor installation type electronic device, rain water adheres to the surface of the blade (41) during rain, but the rain water attached to the surface of the blade (41) generates a centrifugal force accompanying the rotation of the trunk (4). It will be blown away. Further, since air constantly flows from the inside to the outside of the exhaust port (42), rainwater does not enter the housing (1) from the exhaust port (42).
Therefore, the casing (1) becomes a waterproof structure by the rotation of the barrel (4).

  In addition, if the rotational speed of the barrel (4) is excessively decreased due to a temperature drop in the housing (1), rainwater adhering to the blade (41) cannot be repelled. The lowest rotational speed at which rainwater can be blown off is taken as the lower limit of the rotational speed of the barrel (4).

  As described above, according to the outdoor-installed electronic device, the electronic components inside the housing (1) can be sufficiently protected from the influence of rainwater and heat.

In addition, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim. For example, it is possible to detect rain by installing a rainwater sensor, and adopt a control to stop the rotation of the barrel (4) when it is not raining and the internal temperature of the housing (1) is low. It is.
Further, substantially the same effect can be obtained by rotating the barrel (4) at an appropriate constant rotational speed.

  Furthermore, it is also possible to rotate the barrel (4) in the direction opposite to the rotation direction of the barrel (4) shown in the above embodiment. In this case, the intake port (32) shown in the above embodiment is the exhaust port (32), and the exhaust port (42) is the intake port (42). Then, air flows into the trunk cylinder (4) from the intake port (42), and air descending in the trunk cylinder (4) flows out from the exhaust port (32). Such a casing can be used indoors, for example.

(1) Case
(2) Upper lid
(3) Lower lid
(4) trunk
(41) Feather
(42) Exhaust port
(5) Duct
(6) Bearing
(7) Motor
(8) Chassis
(9) First board
(93) Second board
(94) Temperature sensor

Claims (5)

  In an electronic device in which an electronic component is housed in a housing, the housing includes a barrel that is supported so as to be rotatable about a vertical central axis, and one or a plurality of openings are opened at the bottom of the housing. The cylinder is provided with a plurality of openings that surround the central axis and penetrate from the inside to the outside, and that protrudes outward while covering each opening, and is predetermined with respect to the direction in which the cylinder rotates. An electronic apparatus, wherein a plurality of blades having an angle of is projected, and a driving mechanism for rotating the cylinder around the central axis is connected to the cylinder.   The electronic device according to claim 1, wherein the predetermined angle is set to a receding angle with respect to the rotation direction.   The electronic device according to claim 1, wherein the drive mechanism is connected to a control circuit that controls rotation of the barrel based on detection of a temperature in the housing.   The electronic device according to claim 3, wherein the control circuit increases the rotational speed of the barrel as the temperature in the housing increases.   The casing includes an upper lid disposed above the barrel, and a lower lid disposed below the barrel, and the barrel is rotationally driven with respect to the upper lid and the lower lid. The electronic device according to any one of claims 1 to 4, wherein a plurality of openings are opened, and the electronic component is accommodated in a barrel.

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