JP2772210B2 - Electronic equipment cooling system - 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 device for an electronic device, and more particularly to a cooling device for an electronic device using a liquid refrigerant.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram showing an example of a conventional cooling device for an electronic device, and FIG. 3 is a circuit diagram showing details of a main part of the example of FIG.

As shown in FIG. 2, a cooling device 30 of a conventional electronic device which uses a liquid refrigerant among the cooling devices of the electronic device is configured such that a liquid refrigerant is supplied to a heating section 46 of the electronic device 31 through a hose 32a. To the heat exchanger 42 via the hose 32b to remove the heat of the heat generating part 46 and return the liquid refrigerant whose temperature has increased to the heat exchanger 42. After the absorption, the electronic device 31 is supplied to the electronic device 31 again by the hose 32a via the check valve 35 or 41 by the pump 39 or 40.

The pumps 39 and 40 operate by being supplied with driving power from a power supply unit 33 via power cables 34a and 34b, respectively, and the power supply unit 33 is controlled by a cooling control unit 37.

[0005] The electronic device control unit 44 in the electronic device 31 includes:
The heat of the heat generating unit 46 is measured by the temperature sensor 45, and a signal from the cooling control unit 37 is used to generate heat from the heat generating unit power supply 47.
, And a power supply to the heating section 46 is turned on / off. That is, when there is an abnormality in the cooling system, the supply of power from the heat generating unit power supply 47 to the heat generating unit 46 is stopped.

[0006] The cooling control section 37 is a section in charge of controlling the operation of the cooling device, and has a processing section (CPU) 59, an input / output section 60, and an abnormality detection section 58. Abnormality detector 5
8 always monitors the state of the CPU59 and the input-output unit 60, when the abnormality in them has occurred and outputs an abnormality detection signal 61. Anomaly detection signal 6 from anomaly detector 58
1 drives the relay circuit 66 in the power supply supply unit 33.
When the relay circuit 66 is operated, the relay circuit 67 and 68 for relaying the driving of the pump 39 and 40 respectively driven you stop the operation of the pump 39 and 40 together,
An abnormality report signal 62 is sent to the electronic device controller 44. In this way, when an abnormality occurs in the cooling control unit 37, the power supply unit 33 stops the operations of the pumps 39 and 40, and reports the occurrence of the abnormality to the electronic device control unit 44, thereby controlling the electronic device control. The unit 44 includes a heating unit power supply 47
, An abnormal cooling is reported, and the heat generating unit power supply 47 is stopped urgently.

Since the electronic device 31 is required to operate continuously for a long time, the cooling device 30 is also required to operate continuously for a long time. For this reason, the cooling device 30 prepares two sets of pumps, pipes, and drive circuits for supplying the liquid refrigerant, one of which is constantly operated, and the other one is in a standby state. . When an abnormality occurs in the operating pump or its drive circuit, the operation of the cooling device 30 is continued by stopping the operation of the pump and operating the standby pump.

[0008]

In the conventional cooling device for an electronic device as described above, when an abnormality occurs in a pump or a pump driving circuit, the cooling device is switched to a spare pump or a pump driving circuit to continue the operation of the cooling device. It is not necessary to stop the operation of the electronic device because the operation of the two pumps is stopped when the cooling control unit fails.
It has the disadvantage that the operation of the electronic device has to be stopped. Therefore, when a conventional cooling device for an electronic device is used for an electronic device such as a computer system that cannot be stopped, there is a problem that a serious situation may occur due to a failure of the cooling control unit.

[0009]

A cooling device for an electronic device according to the present invention supplies a liquid refrigerant to a heat generating portion of the electronic device.
There are two pumps provided in parallel, two relay circuits for relaying the supply of power to each of the two pumps, and a third relay circuit for transmitting a drive signal for the two relay circuits. A power supply unit, a processing unit performing a control operation, and an input / output unit that drives the two relay circuits via the third relay circuit, and an abnormality detection unit that monitors an abnormality of the processing unit and the input / output unit. Part and the abnormality
A cooling control unit that operates the two relay circuits to stop supply of power to the two pumps when a detection unit detects an abnormality in the input / output unit or the processing unit. in the cooling apparatus for an electronic device, the fourth relay circuit provided in parallel with one of the relay circuit of said two relay circuit, when abnormality in the cooling control unit has occurred, the cold
Output from the rejection control unit via the third relay circuit.
It is intended to include to forcibly operate the corresponding pump by operating the fourth relay circuit by the control unit of the electronic device by entering the abnormality report signal.

[0010]

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

FIG. 1 is a circuit diagram showing a main part of an embodiment of the present invention, and shows a portion corresponding to FIG.

In FIG. 1, a cooling control section 1 is a section in charge of controlling the operation of the cooling device, and a processing section (CPU)
8, an input / output unit 9 and an abnormality detection unit 7. A relay circuit 13 in the power supply unit 4 that relays the driving of the pump 5 and a relay circuit 14 that relays the driving of the pump 6 are connected to the input / output unit 9 via a relay circuit 10. The abnormality detection unit 7 constantly monitors the states of the CPU 8 and the input / output unit 9, and outputs an abnormality detection signal 16 to the relay circuit 10 when an abnormality occurs in any of them. Upon receiving the abnormality detection signal 16, the relay circuit 10 drives the relay circuits 13 and 14 to stop the operations of the pumps 5 and 6, and sends an abnormality report signal 17 to the electronic device control unit 2.

An electronic device control unit 2 in the electronic device measures the heat of the heat generating unit in the electronic device by a temperature sensor 24, and sends a signal to the heat generating unit power supply 3 based on this and a signal from the cooling control unit 1. The power is output to turn on / off the power supply to the heat generating unit in the electronic device. That is, when there is an abnormality in the cooling system, the supply of power from the heat generating unit power supply 3 to the heat generating unit in the electronic device is stopped.

A relay circuit 14 for relaying the operation of the pump 6
And a relay circuit 12 is provided in parallel with the relay circuit 12.
Is driven by the electronic device control unit 2.

In the cooling device configured as described above, in a normal operation state, one of the pumps 5 and 6 is operating, and the pump driving signal from the cooling control unit 1 is supplied to the relay circuit 10. Through the relay circuit 13 or 1
4 to supply power to the pump 5 or 6.
At this time, the relay circuit 12 is not operating.

An abnormality detecting section 7 is composed of a CPU 8 and an input / output section 9
When the abnormality is detected, the relay circuit 10 operates to drive the relay circuits 13 and 14 to stop the operations of the pumps 5 and 6, and sends an abnormality report signal 17 to the electronic device control unit 2.

When the abnormality report signal 17 is input, the electronic device control unit 2 operates the relay circuit 12 to forcibly operate the pump 6 while the temperature of the heat generating unit in the electronic device is normal. Then, an abnormal stop notice signal is output to the heat generating unit power supply 3 so that the cooling device can be repaired by systematically stopping the operation of the electronic device.

After outputting the abnormal stop notice signal, the electronic device control unit 2 monitors the temperature of the heat generating unit in the electronic device. The heat generation unit power supply 3 is stopped by transmitting a cooling abnormality. At the same time, the operation of the pump 6 by the relay circuit 12 is stopped.

[0019]

As described above, the cooling device of the present invention is provided with another relay circuit in parallel with the relay circuit for relaying the drive of the pump, and when an abnormality occurs in the cooling control unit, the control of the electronic device is performed. By operating the relay circuit provided in parallel by the unit and forcibly operating the pump, it is possible to continue operation without stopping the operation of the electronic device immediately when an abnormality occurs in the cooling control unit Therefore, there is an effect that the operation of the electronic device can be stopped systematically and the cooling device can be repaired. Therefore, when used for an electronic device such as a computer system that is not allowed to stop its operation, there is an effect that a serious situation can be prevented from occurring due to a failure of the cooling control unit.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a main part of an embodiment of the present invention.

FIG. 2 is a block diagram illustrating an example of a conventional cooling device for an electronic device.

FIG. 3 is a circuit diagram showing details of a main part of the example of FIG. 2;

[Explanation of symbols]

1.37 Cooling control unit 2.44 Electronic device control unit 3.47 Heating unit power supply 4.33 Power supply unit 5.6.339.40 Pump 7.58 Abnormality detection unit 8.59 Processing unit (CPU) 9.60 Input / output unit 10, 12, 13, 14, 66, 67, 68 Relay circuit 16, 61 Error detection signal 17, 62 Error report signal 24, 45 Temperature sensor 30 Cooling device 31, Electronic device 32a, 32b Hose 34a, 34b Power cable 35/41 Check valve 38 Expansion tank 42 Heat exchanger 46 Heating part

Claims (1)

(57) [Claims] 1. Two pumps provided in parallel for supplying a liquid refrigerant to a heat generating part of an electronic device, two relay circuits for relaying power supply to each of the two pumps, and and a power supply unit which have a third relay circuit which transmits a driving signal of the two relay circuits, input for driving the two relay circuit via the processing unit and the third relay circuit for controlling operation An output unit, the processing unit, and an abnormality detection unit that monitors an abnormality of the input / output unit.
The abnormality detection unit detects an abnormality in the input / output unit or the processing unit.
When the detection is performed, the two relay circuits are operated to operate the two relay circuits.
A cooling control unit for stopping supply of power to one of the two pumps, wherein a fourth relay circuit is provided in parallel with one of the two relay circuits; When an error occurs in the
The third relay circuit output from the cooling control unit
Cooling apparatus for an electronic device, characterized in that the control unit of the electronic device by entering the abnormality report signal via involves forcibly driving the corresponding pump by operating the fourth relay circuit.