JPH0962370A - Cooling device for electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the temperature rise of an electronic equipment despite an off state of a main power supply by providing an auxiliary power supply to supply a firm power in addition to the main power supply and supplying the power from the auxiliary power supply to a cooling means for cooling the inside of the electronic equipment. SOLUTION: The supply of power of a main power supply part 2a is discontinued and therefore an electronic equipment 1 is turned off. Thus a control part 5 stops the supply of power to a fan 3 from an auxiliary power supply part 2b. However, the part 5 continues the supply of power to a memory circuit 1b via the part 2b. When a temperature sensor 4 detects that the ambient temperature of the part 2b exceeds a prescribed level, the part 5 supplies the power to the fan 3 via the part 2b to prevent the temperature rise of the part 2b. Then the internal heating value of a power unit 2 is reduced compared with a case where the equipment 1 is kept in an on state. Thus the power supplied to the fan 3 is also reduced, so that the power consumption and the noises of fan 3 can be reduced. Then the part 5 stops the supply of power to the fan 3 when the temperature detected by the sensor 4 falls.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for preventing temperature rise inside electronic equipment.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram showing electrical connection of an electronic device having a conventional cooling device. Power supply unit 1
2, a main power source 12a, an auxiliary power source 12b, a cooling fan 13
And the control part 15 is provided. The main circuit 11a built in the electronic device 11 is supplied with power from the main power supply unit 12a, the memory circuit 11b is supplied with power from the auxiliary power supply 12a, and the main power supply 12a and the auxiliary power supply 12b are connected to external power lines, respectively.

The cooling fan 13 for cooling the inside of the electronic device 11 is also supplied with electric power from the main power supply 12a. Electronic equipment 1
Since the control unit 15 that detects the heat generation state of No. 1 by the temperature sensor 14 and controls the power supply to the fan 13 is supplied with power from the main power supply 12a, the main circuit 1a of the electronic device 11 is
When the main power supply 12a is turned off to stop the
The power supply to 5 is also stopped. Therefore, even when the auxiliary power supply 12b is supplying power to the memory circuit 11b and the like even when the main power supply 12a is off, even if the auxiliary power supply 12b generates heat, it cannot be cooled by the cooling fan 13.

[0004]

In the conventional cooling device for electronic equipment as described above, the inside of the electronic equipment 11 is cooled only when the main power supply 12a is turned on. Electronic devices having a signal on / off function, a suspend function, and the like supply power to the memory circuit 11b and the like by an auxiliary power supply 12b for always energizing, but even if these parts generate heat, the main power supply 12a does not. There is a problem that cooling is not performed in the off state.

The present invention is intended to solve the above-mentioned problems. Even when the main power supply is off, the auxiliary power supply detects the internal temperature of the electronic device and operates by a fan if cooling is required. The purpose is to cool and prevent the temperature rise of electronic devices.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a cooling device for an electronic device, which cools an electronic device provided with an auxiliary power source for constantly supplying electric power, in addition to a main power source, and to cool the inside of the electronic device from the auxiliary power source. Power is supplied to the cooling means for cooling, and a temperature sensor for detecting the temperature of any one of the auxiliary power supply and the part where the power is supplied from the auxiliary power supply and whose temperature rises is provided. When it is on and when the main power supply is off and the temperature sensor detects a temperature above a certain value, power is supplied to the cooling means and the main power supply is off and the temperature sensor does not detect a temperature above a certain value. In some cases, the cooling means may not be supplied with power.

[0007]

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

FIG. 1 is a block diagram showing an electrical connection according to an embodiment of the present invention.

In FIG. 1, a power supply unit 2 built in an electronic device 1 has a main circuit 1a, a memory circuit 1b, and a cooling fan 3 for cooling the power supply unit 2 therein.
A main power supply section 2a for supplying electric power to the main circuit 1a,
Auxiliary power supply unit 2b for supplying power to the memory circuit 1b, the fan 3, the temperature sensor 4, and the control unit 5, and the main power supply unit 2a.
Based on the temperature detected by the temperature sensor 4 and the on / off state of the main power supply 2a, the temperature sensor 4 detects the temperature near the auxiliary power supply 2b that produces the most heat when the power supply is off. It is composed of a control unit 5 for switching the amount of power supplied to the device.

In the figure, the auxiliary power supply section 2b always supplies power when the power supply unit 2 is supplied with power.
The main power supply unit 2a supplies electric power when the electronic device 1 is in the on state, that is, when the main circuit 1a is in the on state.

When the main power supply unit 2a is on, the control unit 5 supplies electric power to the fan 3 to cool the inside of the electronic device 1 including the inside of the power supply unit.

When the power supply of the main power supply section 2a is stopped to turn off the electronic device 1, the control section 5 stops the power supply from the auxiliary power supply section 2b to the fan 3, but the auxiliary power supply section 2b supplies the power. Power supply to the memory circuit 1b continues. At this time, the temperature sensor 4 detects the temperature in the vicinity of the auxiliary power supply unit 2b, and when detecting that the detected temperature exceeds a certain value, the control unit 5 supplies power from the auxiliary power supply unit 2b to the fan 3. The temperature rise of the auxiliary power supply unit 2b is prevented.
At this time, when the electronic device 1 is in the ON state, the power supply unit 2
Since the amount of heat generated inside is low, the electric power supplied to the fan 3 is also smaller than when the electronic device 1 is in the ON state, and the power consumption and the noise generated from the fan 3 are reduced. Auxiliary power supply unit 2
When b is cooled and the temperature detected by the temperature sensor 5 decreases, the control unit 5 stops the power supply to the fan 3.

FIG. 2 is a time chart showing the operation of this embodiment. From the top, the power supply state of the main power supply 2a and the temperature sensor 4 are shown.
3 shows the detected temperature and the electric power supplied to the cooling fan 3.

In the present invention, the auxiliary power source may always supply power to the cooling means regardless of the ON / OFF state of the main power source.

[0015]

INDUSTRIAL APPLICABILITY The present invention has an effect that the temperature rise of the electronic equipment can be prevented even if the main power source is turned off by supplying the electric power from the auxiliary power source to the cooling means.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical connection of an embodiment of the present invention.

FIG. 2 is a time chart showing the operation of the form shown in FIG.

FIG. 3 is a block diagram showing an electrical connection of a conventional cooling device for an electronic device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 electronic device 1a main circuit of electronic device 1b memory circuit of electronic device 2 power supply unit 2a main power supply 2b auxiliary power supply 3 cooling fan 4 temperature sensor 5 controller 11 electronic device 11a main circuit of electronic device 11b memory circuit of electronic device 12 Power supply unit 12a Main power supply 12b Auxiliary power supply 13 Cooling fan 14 Temperature sensor 15 Control unit

Claims (3)

[Claims] 1. In a cooling device for an electronic device, which cools an electronic device provided with an auxiliary power supply which constantly supplies electric power in addition to a main power supply, the auxiliary power supply supplies electric power to a cooling means for cooling the inside of the electronic device. A cooling device for electronic equipment, characterized in that 2. A temperature sensor for detecting the temperature of any one of an auxiliary power source and a portion of which temperature is raised by power supplied from the auxiliary power source, wherein the auxiliary power source is on when the main power source is on and when the main power source is off. When the temperature sensor detects a temperature above a certain value, power is supplied to the cooling means, and when the main power supply is off and the temperature sensor does not detect a temperature above a certain value, the power is supplied to the cooling means. The cooling device for electronic equipment according to claim 1, wherein the cooling device is not provided. 3. The power supplied by the auxiliary power supply to the cooling means when the main power supply is off and the temperature sensor detects a temperature equal to or higher than a certain value than the power supplied by the auxiliary power supply to the cooling means when the main power supply is on. The cooling device for an electronic device according to claim 2, wherein the cooling amount is small.