JP2585029Y2 - Heat dissipation structure of electronic equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a heat radiation structure of an electronic device in which heat is forcibly released by a fan.

[0002]

2. Description of the Related Art As shown in FIGS. 8 and 9, a conventional heat dissipating structure of an electronic device in which a fan 3 forcibly dissipates heat is provided with a fan 3 on a ceiling plate 2 of a housing 1 of the electronic device. The air 6 heated by the heat generated by the electronic component unit 5 in the housing 1 is forcibly discharged to the outside of the housing 1 by the fan 3.

According to this conventional structure, the ceiling plate 2 is provided with only the ventilation opening 2a for the fan 3, so that the operation of the fan 3 is stopped due to a failure of the fan 3 or the like, and the housing 1 is moved by natural convection of air. The area of the ventilation hole was too small when the situation where the heat inside had to be exhausted occurred. Therefore, when the fan 3 stops, the air 6 heated by the electronic component unit 5 stays in the housing 1 as shown in FIG. However, there has been a problem of causing a failure or shortening of the service life.

On the other hand, in order to solve the above problem, FIG.
As shown in FIG.
If the ventilation port 2b is provided, the air 6a outside the housing 1 is sucked by the ventilation port 2b and the air 6a is discharged from the fan 3 when the fan 3 operates, so that the inside of the housing 1 is heated. There is a problem that the air cannot be efficiently exhausted using the fan 3.

[0005]

As described above, in the conventional heat dissipation structure, only the ventilation holes for the fan are provided at the upper part of the housing, and when the fan stops, the electronic components inside the housing are heated. There is a problem that air stays in the housing and the temperature inside the housing rises rapidly.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional drawbacks. When the fan is operating, the air heated inside the housing can be efficiently exhausted by the fan, and when the fan is stopped, the air is naturally convected by the air. An object of the present invention is to provide a heat radiation structure of an electronic device that can efficiently discharge air warmed in the body.

[0007]

According to a first aspect of the present invention, a fan is provided at an upper portion of the housing for forcibly discharging air heated by electronic components housed in the housing to the outside of the housing. In the heat dissipation structure of an electronic device, the heat dissipation structure is formed at a location other than the fan at the upper part of the housing and is heated by the electronic component.
Air discharged outside of the enclosure by natural air cooling.
And vent of fit, positioning the fan the vent closes the first position and the shutter is movable to the ventilation open mouth second position, said shutter during operation of the fan in a first position And shutter moving means for positioning the shutter at the second position when the shutter stops.

According to a second aspect of the present invention, in the first aspect, the shutter moving means includes a stop detecting sensor provided on the fan and a shutter from a first position to a second position in accordance with a signal from the sensor. And a shutter moving mechanism for moving.

In a third aspect of the present invention, in the first aspect, the shutter moving means includes a spring for positioning the shutter at the second position, and receiving the wind pressure of the fan to move the shutter to the first position against the spring. It is composed of a wind receiver to be positioned.

[0010]

In the first aspect of the present invention, when the fan is operating, the shutter is positioned at the first position by the shutter moving means, the ventilation port is closed by the shutter, and when the fan is stopped, the shutter is moved by the shutter moving means to the second position. The ventilation opening is opened at the position.

In the second invention, in the first invention, the opening and closing of the ventilation opening is performed by a shutter moving mechanism based on a signal from a stop detection sensor provided in the fan.

According to a third aspect of the present invention, in the first aspect, the shutter is positioned at a second position by a spring to open a ventilation port, and when the fan is operated, the shutter receives the wind pressure of the fan so that the shutter is in the first position. It is positioned at the position and closes the ventilation opening.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS.

FIGS. 1 to 5 are views for explaining a first embodiment. FIG. 1A is a sectional view taken along line AA of FIG.
4B is a cross-sectional view taken along line CC of FIG. 4, FIG. 2 is a top perspective view of the housing when the fan is operating, FIG. 3 is a cross-sectional view taken along line BB of FIG.
Is a top perspective view of the housing when the fan is stopped, and FIG.
It is D sectional drawing.

As shown in FIGS. 2 and 4, a housing 11 of the electronic device of this embodiment has a fan 12 at the center of the upper portion of the housing 11.
Is provided around the fan 12, and a ventilation port 11 a is provided around the fan 12.
A plurality of shutters 14 are provided in the ventilation port 11a.
Is mounted so as to be rotatable about a shaft 15.

A solenoid 17 serving as a shutter moving mechanism is attached to the inner wall on the upper side of the housing 11, and as shown in FIGS. 3 and 5, a plurality of solenoids 17 each having one end connected to a movable rod 18 thereof. The other end of the connecting rod 19
Each is connected to the end of the shutter 14. And
When power is not supplied to the solenoid 17, the movable rod 18 is positioned at the position shown in FIG.
As a result, the shutter 14 is positioned at a position (first position) for closing the ventilation port 11a, and when power is supplied to the solenoid 17 and the movable rod 18 is sucked by the solenoid 17, as shown in FIG. 11a is positioned at the opening position (second position). In this example, a fan with a stop sensor (manufactured by Sanyo; product number 109S405UL) is used as the fan 12.
When the fan 12 stops, power is supplied to the solenoid 17 by a signal from a stop sensor (not shown).

With the above configuration, during operation of the fan 12, the ventilation port 11a is closed by the shutter 14 and closed by the electronic component unit 21 in the housing 11, as shown in FIG. The heated air-22 is the fan 12
As a result, the air is forcibly discharged from the ventilation port 11b for the fan 12. Therefore, the air 22 heated by the electronic component unit 21 can be efficiently discharged to the outside of the housing 11 by the fan 12 without sucking the air outside the housing 11 through the ventilation port 11a.

When the fan 12 is stopped due to a failure or the like, the solenoid 17 is operated to open the shutter 14 that has closed the ventilation port 11a, and as shown in FIG. In addition to the opening 11b, a ventilation opening 11a having a large area is formed. Accordingly, the air 22 heated by the electronic component unit 21 is efficiently discharged to the outside of the housing 11 by natural convection of air, and the temperature rise in the housing 11 due to the stoppage of the fan 12 can be minimized. it can.

FIGS. 6 and 7 are views for explaining a second embodiment of the present invention. FIG. 6 is a sectional view when the fan is operating, and FIG. 7 is a sectional view when the fan is stopped.

The housing 11A of the electronic device according to the present embodiment has a fan 12 at the upper central portion.
Ventilation holes 11c are formed on both sides. Also, housing 1
A shutter 24 formed in a substantially "C" shape is provided on the upper portion of 1A.
Is mounted so as to be rotatable about a shaft 25. The shutter 24 includes an original shutter portion 24a for closing the ventilation port 11c and a shutter portion (wind receiving member) 24b for closing the ventilation port 11b for receiving the wind from the fan 12. And
When the fan 12 is stopped, the spring 2 provided between the upper part of the housing 11A and the shutter 24 as shown in FIG.
6, the vent hole 11b for the fan is placed in the wind receiver 24.
b, the shutter 24 rotates when the wind receiver 24b receives the wind pressure of the fan 12 during operation of the fan 12, and the shutter portion 24a is positioned at a position to close the ventilation port 11c. Has become.

In this embodiment, the ventilation port 11c is closed by the shutter portion 24a during the operation of the fan 12, only the ventilation port 11b for the fan is opened, and when the fan 12 is stopped, the ventilation port 11c having a larger area than the ventilation port 11b. Is opened, as in the first embodiment, when the fan 12 is operating, the air 22 warmed in the housing 11A can be efficiently exhausted out of the housing 11A by the fan 12, and when the fan 12 is stopped, Body 11A
The air-22 heated inside can be efficiently discharged by natural convection of air.

[0022]

As described above, in the heat dissipation structure of the electronic device of the present invention, the ventilation port is closed by the shutter when the fan is operating, and the ventilation port is opened when the fan is stopped. The air heated inside the body can be efficiently discharged by the fan, and when the fan is stopped, the air heated inside the housing can be efficiently discharged by natural convection of the air.

[Brief description of the drawings]

FIG. 1 is a diagram showing an operation of a heat dissipation structure according to a first embodiment of the present invention.

FIG. 2 is an upper perspective view of the housing according to the first embodiment of the present invention when the fan is operating.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a top perspective view of the housing according to the first embodiment of the present invention when the fan is stopped.

FIG. 5 is a sectional view taken along line DD of FIG. 4;

FIG. 6 is a sectional view of the heat radiation structure according to the second embodiment of the present invention when the fan is operating.

FIG. 7 is a sectional view of the heat dissipation structure according to the second embodiment of the present invention when the fan is stopped.

FIG. 8 is a top perspective view of a housing of a conventional electronic device.

FIG. 9 is a sectional view taken along line EE of FIG. 8;

FIG. 10 is a sectional view taken along line EE in FIG. 8 when the fan is stopped.

FIG. 11 is a sectional view of a housing of another conventional electronic device.

[Explanation of symbols]

11: Housing 12: Fan with stop sensor 11a: Ventilation opening 14: Shutter 17: Solenoid 21: Electronic component 22: Air

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H05K 7/20

Claims (3)

(57) [Scope of request for utility model registration] 1. A heat dissipating structure for an electronic device, wherein a fan for forcibly discharging air heated by electronic components housed in a housing to the outside of the housing is provided at an upper portion of the housing. is formed at a location other than the top said fan, said
Air heated by electronic components is cooled by natural air cooling
A vent for discharging to the outside, a shutter movable from a first position for closing the vent to a second position for opening the vent, and a first position for operating the fan when the fan operates. And a shutter moving means for positioning the shutter at the second position when the fan is stopped. 2. The method according to claim 1, wherein said shutter moving means operates a fan.
2. A stop detecting sensor for detecting a state, and a shutter moving mechanism for moving a shutter from a first position to a second position according to a signal of the sensor. Heat dissipation structure of electronic equipment. 3. A shutter moving means comprising : a spring for positioning a shutter at a second position; and a wind receiver for receiving a wind pressure of a fan during operation of the fan and positioning the shutter at a first position against the spring. The heat dissipation structure for an electronic device according to claim 1, wherein the heat dissipation structure is configured.