JP2639242B2 - Electronic device cooling structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling structure of an electronic device, and more particularly, to a cooling structure of an information processing device which performs forced air cooling by a fan.

[0002]

2. Description of the Related Art In the past, an information processing apparatus was installed in a place different from a general office such as a computer room. However, as the size of the device has been reduced, the information processing device has come into the office and the need to reduce noise has arisen. For this reason, the conventional information processing apparatus is provided with a sound deadening duct.

As shown in FIG. 2, the cooling structure of a conventional information processing apparatus is such that a fan 4 in a housing 1 rotates.
The wind is taken in from the lower part of the housing 1. The wind passes between the cards 2 on which the heat-generating ICs 6 are mounted in the housing 1, passes through the sound deadening duct 3, and is discharged out of the housing 1. The sound deadening duct 3 has a function of reducing sound due to wind for cooling by attaching a sound absorbing material to an inner wall surface, intentionally increasing a bend, and providing a wind outlet far from a human ear. is there.

[0004] The installation of the sound deadening duct makes it difficult for the wind to pass through in order to reduce the sound, thereby deteriorating the cooling characteristics. Unlike the computer room, the temperature environment in the office can not be controlled enough,
In some cases, people in the office could get hot enough to feel hot. Therefore, conventionally, in such a case, the device may not operate normally. Therefore, the speed of the fan is increased, the cooling effect is increased, and the normal operation is maintained without stopping the device.

[0005]

The cooling structure in the above-mentioned conventional information processing apparatus requires a fan that can be controlled to change the speed in steps to increase the speed of the fan in a high-temperature environment. A complicated fan was required, leading to a decrease in reliability.

[0006]

According to the present invention, there is provided a cooling structure for an electronic device, comprising: a card mounted with an electronic circuit and housed in a device housing; a fan for generating cooling air around the card; A silencing duct that guides the cooling air that has passed around to the outside of the device housing, and an opening that has a lid provided in a ventilation passage that sends the cooling air that has passed around the card to the silencing duct, wherein the lid The cooling air is discharged through the sound deadening duct when the cover is closed, and the cooling air is discharged through the sound deadening duct when the lid is closed.

In the cooling structure of the electronic device according to the present invention, the lid is opened when the temperature of the cooling air is higher than a predetermined temperature, and the lid is closed when the temperature of the cooling air is lower than the predetermined temperature.

[0008] cooling structure of the electronic device of the present invention, a temperature sensor provided in the suction portion of the cooling air, the temperature sensor is open the lid by detecting the temperature of the cooling air of a predetermined temperature or higher, the
When the temperature sensor detects the temperature of the cooling air below a predetermined temperature, the lid is closed.

[0009]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of a cooling structure of an electronic device according to an embodiment of the present invention.

The card 2 on which the IC 6 is mounted is the device housing 1
Assembled in cage 7 inside. The fan 4 is installed on the upper part of the cage 7, and the rotation of the fan 4 causes air to pass between the cards 2 on which the ICs 6 are mounted. Fan 4
A silencing duct 3 is provided from the upper portion to the side surface of the device housing 1, and an opening having a lid 5 is provided on a wall surface above the fan 4 of the silencing duct 3. Fan 4 blows I
C6 is cooled, but the effect of cooling is determined by the amount of wind, and the effect increases as more wind passes.

A temperature sensor 8 is provided in the lower part of the apparatus housing 1 near the inlet of cooling air. When the temperature of the room in which the device is installed is lower than a certain temperature, the lid 5 is closed and the wind generated by the fan 4 is exhausted through the sound deadening duct. When the room temperature rises to a certain temperature, this is detected by the temperature sensor 8 and the closed lid 5 is opened, and the flow of the wind passes through the upper part of the apparatus casing 1 without passing through the duct 3 and passing through the upper part of the apparatus casing 1. And the wind is discharged without resistance, and the capacity of the fan increases.

The opening / closing structure of the lid 5 is such that a motor or the like is driven by a signal obtained from the temperature sensor 8.
A general electric opening and closing structure may be used. When the lid 5 is opened, the wind passes right above, so that it is not necessary to block the outlet of the duct 3.

[0014]

As described above, according to the present invention, the cooling efficiency is improved by opening the lid at the time of high temperature, so that it is not necessary to set the fan rotation speed to two stages, thereby reducing the cost and improving the reliability. effective.

[Brief description of the drawings]

FIG. 1 is a sectional view of one embodiment of the present invention.

FIG. 2 is a cross-sectional view of a cooling structure of a conventional electronic device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Device housing 2 Card 3 Silence duct 4 Fan 5 Lid 6 IC 7 Cage 8 Temperature sensor

Claims (3)

(57) [Claims] 1. A card mounted with an electronic circuit and stored in a housing of a device, a fan for generating a cooling wind around the card, and a cooling wind after passing around the card to the outside of the device housing. A silencing duct that guides the air, and an opening that has a lid provided in a ventilation passage that sends cooling air passing around the card to the silencing duct, and the cooling air is discharged without passing through the silencing duct when the lid is opened. A cooling structure for an electronic device, wherein cooling air is discharged through the muffle duct when the lid is closed. 2. The cooling structure for an electronic device according to claim 1, wherein the lid is opened when the temperature of the cooling air is equal to or higher than a predetermined temperature, and the lid is closed when the temperature of the cooling air is equal to or lower than the predetermined temperature. 3. A temperature sensor is provided at a cooling air suction portion,
Wherein the temperature sensor is open the lid by detecting the temperature of a predetermined temperature or higher of the cooling air, the temperature sensor is an electronic device for a predetermined by detecting the temperature of the following cooling air temperature close the lid claim 1, wherein Cooling structure.