JPH0669263B2 - Electronic component protection device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a protection device for an electronic component, which prevents the reliability and destruction of the electronic component due to heat generation.

[Conventional technology]

2. Description of the Related Art In electronic devices such as electronic computers in recent years, circuit elements have been increased in size and packaging density has been increased in order to improve performance.
Along with this, the heat generation density inside the electronic device has become higher, and the deterioration of reliability and destruction of electronic components has become a problem. As a countermeasure against this, a liquid cooling method for cooling electronic components is adopted. This is a method in which, for example, a liquid coolant is flown on a flat plate, and an element or electronic component is brought into close contact with the flat plate to transfer heat to the coolant. In such a cooling method, a temperature sensor or an element having an equivalent function is prepared in the element, and by monitoring the sensor output (heat generation temperature), cooling is performed when a certain temperature abnormality occurs. Protects the elements and electronic components from deterioration in reliability or destruction.

FIG. 4 is a block diagram of a conventional temperature monitoring system.
In the figure, reference numeral 1 denotes an electronic device, which includes a power supply control unit 3 and two electronic components 2a and 2b. The power supply controller 3 controls start and stop of power supply to the electronic components 2a and 2b. The electronic components 2a, 2b are provided with temperature sensors 4a, 4b, and the detection outputs of the temperature sensors 4a, 4b are the temperature measuring unit 21 in the protection device unit 20 of the electronic components 2a, 2b.
Has been entered in. When the temperature measuring unit 21 confirms that the electronic components 2a and 2b are powered on from the power supply control unit 3 via the power-on signal line 5, the temperature sensor 4
The temperature detection of a and 4b is started. The temperature measuring unit 21 sends the measurement result to the abnormality determining unit 22, and the abnormality determining unit 22 determines whether or not the measured temperature is equal to or higher than the specified temperature.
The specified temperature is set to a value that does not affect the reliability of the electronic components 2a and 2b. When the abnormality determination unit 22 determines that one of the electronic components 2a and 2b is abnormal, the abnormality determination unit 22 transmits an abnormality occurrence signal to the abnormality notification unit 23. Then, the abnormality notification unit 23 sends a stop signal to the power supply control unit 3 via the power supply stop signal line 7. When this stop signal is input, the power control unit 3
The power supply to the electronic component 2 is stopped to prevent the reliability from being deteriorated and destroyed due to heat generation.

[Problems to be Solved by the Invention]

However, when the conventional electronic component protection device 20 detects a temperature abnormality in one electronic component, the power supply controller 3
Since the power supply to the electronic components 2a and 2b is stopped by sending a stop signal to the electronic components, even if the electronic components themselves are normally cooled, if any of the temperature sensors 4a and 4b is abnormal, the temperature is abnormal. Therefore, there is a drawback that the power supply is stopped.

[Means for Solving the Problems]

The electronic component protection device according to the present invention includes temperature measuring means for measuring the temperature of an electronic component while the electronic device is powered on by a temperature sensor provided on a plurality of electronic components, and the electronic device is powered on. The timer means that starts timing at a certain time and outputs an output when the specified time has elapsed, and operates until the output from the timer means for the specified time has elapsed, and one measured temperature measured by the temperature measuring means is abnormal. A first temperature abnormality determination means for determining whether or not, and a second temperature abnormality determination for determining whether or not a plurality of measured temperatures measured by the temperature measurement means are abnormal, which operate after output after a lapse of a specified time from the timer means. And an abnormality occurrence notifying means for inputting the abnormality notice from the two temperature abnormality determining means and notifying the electronic device of the abnormality occurrence.

[Operation] The protective device switches from the first temperature abnormality determination means to the second temperature abnormality determination means after a lapse of a specified time.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a temperature monitoring system showing an embodiment according to the present invention. In the figure, reference numeral 1 denotes an electronic device, which includes a power supply control unit 3 and two electronic components 2a and 2b.
Then, the power supply control unit 3 controls the start and stop of the supply of power to the electronic components 2a and 2b. Each of the electronic components 2a and 2b has a flat plate (not shown) through which the liquid refrigerant flows, and is constantly cooled by bringing the flat plates into close contact with each other.
In addition, inside the electronic components 2a and 2b, temperature sensors 4a,
4b (for example, AD590 manufactured by Analog Devices, Inc.) is provided. Next, 10 is the electronic component 2a,
2b is a protection device for protecting 2b, and timer means 11 for measuring the temperature of a preset specified time and sending out an output, temperature measuring means 12 for measuring the temperature of electronic parts 2a, 2b by temperature sensors 4a, 4b, timer The first temperature abnormality determining means 13a and the timer means 11 measure the specified time by operating until the specified time is measured by the means 11 and determining whether the measured temperature at one location measured by the temperature measuring means 12 is abnormal. Second temperature abnormality determining means 13b for determining whether or not the two measured temperatures measured by the temperature measuring means 12 are abnormal, and the two temperature abnormality determining means 13a, 1 described above.
It is composed of an abnormality occurrence notifying means 14 which inputs the abnormality occurrence signal from 3b and outputs the stop signal through the power supply stop signal line 7. The power-on signal line 5 is connected from the power control unit 3 to the timer means 11 and the temperature measuring means 12 to the electronic component 2
The signals a and 2b are being fed.

By the way, the temperature measuring means 12 inputs a signal indicating that power is being supplied to the electronic components 2a and 2b from the power control unit 3 through the power-on signal line 5, and the temperature provided to the electronic components 2a and 2b during the power supply. Electronic parts 2a, 2b by the sensors 4a, 4b
Measure the temperature. Further, when the timer means 11 also inputs a signal indicating that power is being supplied to the electronic components 2a and 2b through the power-on signal line 5, the timer means 11 starts counting time up to a preset specified time. Then, the measured temperature measured by the temperature measuring means 12 is input to the temperature abnormality determining means 13a, 13b.

Here, until the timer means 11 measures the specified time, only the temperature abnormality determination means 13a operates, so that one of the temperature sensors 4a and 4b (one measured temperature) becomes the specified temperature or higher. It is judged to be abnormal. When this abnormality is determined, the temperature abnormality determination means 13
The a sends an abnormality occurrence signal to the abnormality occurrence notification means 14.
Upon receiving this signal, the abnormality occurrence notifying means 14 sends a stop signal to the power supply control section 3 via the power supply stop signal line 7. After that, the power supply control unit 3 stops the power supply to the electronic components 2a and 2b to prevent the reliability and the destruction of the electronic components 2a and 2b due to the heat generation.

On the other hand, when the timer means 11 clocks the specified time, the temperature abnormality determination means 13a is switched to the temperature abnormality determination means 13b, and two locations (two measurement temperatures) of the temperature sensors 4a and 4b have exceeded the specified temperature. The time is determined to be abnormal. When this abnormality is determined, the same operation as that of the temperature abnormality determining means 13a is performed.

Next, FIG. 2 is a block diagram specifically showing the inside of the protection device 10. The microcomputer system constituting the protection device 10 includes a CPU 10d, a ROM 10e, and an RA.
Multiplexer 10a for selecting one temperature sensor from a plurality of temperature sensors 4a and 4b, a central portion including M10f and I / O port 10g, a preamplifier 10b, and an A / D converter 10c for fetching temperature data into CPU 10d.
Consists of.

The ROM 10e stores programs necessary for controlling the CPU 10d and data necessary for temperature abnormality determination. CP
The U 10d controls the multiplexer 10a to input the signal of the selected temperature sensor to the preamplifier 10b, and also to convert the input from the preamplifier 10b into digital data by the A / D converter 10c. Also, CPU
Reference numeral 10d controls the I / O port 10g to fetch a power supply start or stop signal from the power supply control unit 3 to the electronic components 2a and 2b via the power-on signal line 5, and when a temperature abnormality occurs, the power supply stop signal line 7 A signal to the effect that power supply to the electronic components 2a and 2b is stopped is sent to the power supply control unit 3 via. These control operations are executed according to a software program, and necessary temperature control signals are sent to the respective parts to carry out the temperature abnormality detection operation.

FIG. 3 is a flowchart showing a control program of the protection device 10. When the execution of the program is started (step 100), it is determined whether or not the electronic device 1 is powered on (step 101). If the power is not being turned on, the timer means 11 is reset (step 10).
2) Release the signal from the power stop signal line 7 (step 1
03), the process returns to step 101 in preparation for turning on the electronic device 1. On the other hand, when it is determined that the power is on, the timer means 1
It is determined whether 1 has been started. Here, if it has not been started, the timer means 11 is started (step 105), and if already started, step 105 is omitted. Next, one of the two temperature sensors 4a and 4b is selected (step 1
06), the temperature is measured and the measured temperature is measured by the temperature measuring means 12
(Step 107). And the timer means 1
It is judged whether or not the time measured by 1 has passed a specified time (for example, 1000 seconds) (step 108), and if not, whether one temperature sensor (one electronic component) has a temperature abnormality or not. It is determined (step 111), and if it has already passed, it is determined whether or not there is a temperature abnormality with the two temperature sensors (two electronic components). If it is determined that there is no temperature abnormality in steps 109 and 111, step 101
Then, the next measurement is performed. On the other hand, "abnormal temperature"
If it is determined that the power control unit 3 via the power stop signal line 7
A stop signal indicating that power supply to the electronic components 2a and 2b is stopped is sent to (step 110), and the process returns to step 101.

As described above, in the electronic component protection device according to the present embodiment, when the specified time elapses after the power of the electronic device 1 is turned on, the temperature abnormality determination unit 13a that determines whether one measured temperature is abnormal makes two measurements. It is possible to switch to the temperature abnormality determination means 13b that determines whether the temperature is abnormal. As a result, even if one temperature sensor is broken, the temperature abnormality determination means 13b does not determine "there is a temperature abnormality", and it is possible to prevent malfunction due to abnormality of the temperature sensor. Further, since two temperature abnormality determining means are provided, an initial abnormality that requires an emergency stop immediately after the electronic device 1 is powered on, for example, forgetting to attach a flat plate of liquid refrigerant during replacement work at the time of electronic component failure or a flat plate The temperature abnormality determining means 13a can determine a temperature abnormality due to forgetting to fix the electronic components, and after a lapse of a specified time, the electronic components 2a, 2 for a long time in which malfunctions due to the temperature sensor are not allowed.
The temperature abnormality determination means 13b can determine the temperature abnormality of b.

In the above embodiment, each of the electronic components 2a and 2b has one
The case where the individual temperature sensors 4a and 4b are provided has been described.
A plurality of temperature sensors may be provided in this electronic component.

〔The invention's effect〕

As described above, according to the present invention, a plurality of measured temperatures are abnormal from the first temperature abnormality determining means for determining whether one measured temperature is abnormal at the time when the specified time has elapsed after the power of the electronic device is turned on. It is possible to switch to the second temperature abnormality determining means for determining whether there is any. Thereby, even if one temperature sensor is broken in the second temperature abnormality determining means,
It is possible to prevent malfunction due to abnormality of the temperature sensor without being judged as "abnormal temperature".

Further, since two temperature abnormality determining means are provided at the same time, an initial abnormality that requires an emergency stop immediately after the electronic device 1 is turned on, such as forgetting to attach a flat plate of liquid refrigerant during replacement work when an electronic component fails, or The temperature abnormality due to forgetting to fix the flat plate or the like can be determined by the first temperature abnormality determining means, and after the lapse of the specified time, the temperature sensor can determine the temperature abnormality of the electronic component for a long time during which malfunction by the temperature sensor is not allowed. It has a remarkable effect that it can be performed by the temperature abnormality determining means of No. 2.

[Brief description of drawings]

FIG. 1 is a block diagram of a temperature monitoring system showing an embodiment according to the present invention, FIG. 2 is a block diagram specifically showing the inside of the protection device 10, and FIG. 3 is a control program of the protection device 10. The flow chart shown in FIG. 4 is a block diagram of a conventional temperature monitoring system. 1 ... Electronic device, 2a, 2b ... Electronic parts, 3 ... Power control unit, 4a, 4b ... Temperature sensor, 5 ... Power-on signal line, 7 ... Power-off signal line, 10 ... Protection device , 11
...... Timer means, 12 ...... Temperature measuring means, 13a ...... First temperature abnormality determining means, 13b ...... Second temperature abnormality determining means, 14 ...... Abnormality occurrence notifying means

Claims (1)

[Claims] 1. A protection device for detecting a temperature abnormality of a plurality of electronic parts provided in an electronic device, wherein an electronic part is provided while a power source of the electronic device is turned on by a temperature sensor provided in the plurality of electronic parts. Temperature measuring means for measuring the temperature of, and start timing at the time when the electronic device is powered on,
A timer unit that outputs an output when a specified time has elapsed, and a timer that operates until there is a specified time elapsed output from the timer unit and determines whether one measured temperature measured by the temperature measuring unit is abnormal. And a second temperature abnormality determining means that operates after the output of a predetermined time from the timer means and determines whether the plurality of measured temperatures measured by the temperature measuring means are abnormal. Input the abnormality notification from the two temperature abnormality determination means,
An apparatus for protecting an electronic component, comprising: an abnormality occurrence notifying means for notifying an abnormality occurrence to the electronic device.