JPH11215698A - Computer power shut-off device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] A power cutoff device for a computer that interrupts the processing operation being performed by the computer when the ambient temperature rises, that is, shuts down the power after performing a shutdown process. To provide. A CPU configured to be supplied with power by a breaker via a power supply circuit connected to a main power supply.
A temperature detector 4, which generates an output when the ambient temperature of the computer exceeds a predetermined value at which an alarm should be issued,
5, a CPU 3 that starts shutdown processing when the output of the temperature detector is given, calculates a predicted time required for the shutdown processing, and outputs a power-off signal after the elapse of the predicted time; A power supply circuit 2 for stopping power supply to the computer based on
A power cutoff device for a computer, comprising: a breaker 1 that trips when the power supply circuit stops and stops power supply from the main power supply to the power supply circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for shutting off the power of an electronic computer when the ambient temperature of the electronic computer rises beyond the operation guarantee limit, and particularly when the temperature rises beyond the operation guarantee limit. The present invention relates to a computer power shutdown device that shuts down the power after performing a computer shutdown process.

[0002]

2. Description of the Related Art An electronic computer performs temperature detection from the viewpoint of preventing equipment failure and equipment fire. An alarm is issued externally to prevent a failure, and the power is shut off to prevent a fire.

[0003] A conventional power cutoff device of this type is
It is configured as shown in FIG. That is, the power supply circuit 2 connected to the main power supply via the breaker 1
Is supplied. On the other hand, around CPU3,
Temperature detectors 4 and 5 are provided.

With this configuration, as shown in FIG. 4, the temperature detector 4 issues an external alarm when the ambient temperature rises near the operation guarantee limit (alarm temperature ALM). When the temperature reaches a higher operation guarantee limit (trip temperature TRIP), the breaker 1 is tripped and the power of the CPU 3 is cut off.

[0005]

In this case, when the ambient temperature reaches the trip temperature TRIP, the breaker 1 is forcibly shut off by a detection output generated by the temperature detector 5. As a result, the CPU 3 suddenly terminates the processing operation, causing a serious situation such as data destruction.

The present invention has been made in consideration of the above points, and has a process for interrupting a processing operation being performed by a computer when an ambient temperature rises, that is, performing a shutdown process and then turning off a power supply. It is an object of the present invention to provide a power supply cutoff device for a computer that performs the following.

[0007]

In order to achieve the above object, according to the present invention, there is provided a power supply cut-off device for a computer which is configured to be supplied with power through a power supply circuit connected to a main power supply by a breaker. A temperature detector that generates an output when the temperature exceeds a predetermined value at which a warning is to be issued; and, when an output of the temperature detector is given, a shutdown process is started, and a predicted time required for the shutdown process is calculated. A computer that outputs a power-off signal after a lapse of time, a power supply circuit that stops power supply to the computer based on the power-off signal, and a trip from the main power supply to the power supply circuit due to the stop of the power supply circuit. It is an object of the present invention to provide a power cutoff device for a computer, comprising a breaker for stopping power supply.

[0008]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a timing chart showing the operation thereof. 1, the same reference numerals as those in FIG. 3 indicate the same elements, and FIG. 2 shows the operation timing of each element corresponding to FIG.

First, in FIG. 1, power is supplied to a CPU 3 from a main power supply via a breaker 1 and a power supply circuit 2. Then, a temperature detection signal is provided to the CPU 3 from the temperature detector 4 which is disposed around the CPU 3 and detects that the temperature has reached a temperature near the operation guarantee limit. The output of the temperature detector 5 for detecting the reaching of the operation guarantee limit is given to a delay timer 7 via an OR circuit 6. In the OR circuit 6,
Further, a shutdown processing start signal S1 is sent from the CPU 3.
Is supplied to the delay timer 7 in the same manner as the output of the temperature detector 5.

The delay time of the shutdown timer is set in advance in response to the setting signal S2 from the CPU 3, and the delay time of the OR circuit 8 is set after the estimated time has passed since the output of the OR circuit 6 was given. Breaker 1 through
To the trip signal. The output of the NAND circuit 9 is further provided to the OR circuit 8. This NAND circuit 9 has C
A shutdown processing start signal S1 from the PU 3 and an off signal S4 of the power supply circuit 2 based on the fact that the CPU 3 provides the power supply circuit 2 with the end signal S3 after the shutdown processing is completed.
And an output is given to the OR circuit 8 when the AND condition of both of them is satisfied. Thereby, the OR circuit 8
Sends a trip command to the breaker 1.

[0011] Then, as shown in FIG.
In response to the detection of the LM and the trip temperature TRIP, the operations of the components shown in FIG. 1, the CPU 3, the delay timer 7, the power supply circuit 2, and the breaker 1 are performed.

Assume that the CPU 3 is operating (FIG. 2)
(D)) It is assumed that the ambient temperature is gradually increasing.
Ambient temperature reaches alarm temperature ALM (Fig. 2 (b))
Is notified from the temperature detector 4 to the CPU 3 (FIG. 2C). The CPU 3 may send an alarm to the outside as needed. And CPU3
Now, the shutdown process is started (see FIG. 2).
(F)). Immediately after this, the CPU 3 gives an operation command to the delay timer 7 via the OR circuit 6. While the operation command is given, the delay timer 7 starts an operation of generating an output after a lapse of time set in advance by the setting signal S2 (FIG. 2 (g)).

Thereafter, when the shutdown processing is completed, the CPU 3 sends an end signal S3 to the power supply circuit 2 (FIG. 2 (h)), and in response to this, the power supply circuit 2 stops the DC output, and The off signal S4 (low) is given to the circuit 9. At this time, the NAND circuit 9
Since a signal that becomes low upon completion of shutdown is given from the CPU 3, a NAND condition is satisfied and a trip command is given to the breaker 1 via the OR circuit 8 (FIG. 2).
(I)).

This trip command is given from the delay timer 7 via the OR circuit 8 after the lapse of the set time.
Even if 1 is not supplied, the trip of the breaker 1 is performed at the timing indicated by the dashed line. This is for the purpose of preventing fire of the equipment.

When the temperature further rises and the ambient temperature reaches the trip temperature TRIP, an operation command is sent to the delay timer 7 via the OR circuit 6 in accordance with the output of the temperature detector 5 (FIG. 2A). Given. While the operation command is given, the delay timer 7 starts an operation of generating an output after a lapse of time set in advance by the setting signal S2 (FIG. 2 (g)). Then, after the set time of the delay timer 7 has elapsed, a trip command to the breaker 1 is given via the OR circuit 8 (FIGS. 2 (g) and 2 (i)).

As described above, even if the temperature detector 5 detects the trip temperature TRIP, it is not the operation for forcibly tripping immediately in the conventional device shown by the broken line, but the time after the shutdown processing is completed or almost the same. Since the power is turned off later, the data handled by the CPU 3 is guaranteed not to be destroyed (FIG. 2E).

[0017]

As described above, according to the present invention, even when the ambient temperature has reached the operation guarantee limit, the power supply is not immediately tripped as in the conventional case, but after the computer finishes the shutdown processing. Is tripped, it is possible to prevent data destruction, which has conventionally occurred, and also prevent damage to equipment.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a timing chart showing the operation of the embodiment shown in FIG.

FIG. 3 is a block diagram showing a conventional apparatus configuration.

FIG. 4 is a timing chart showing the operation of the device configuration shown in FIG. 3;

[Explanation of symbols]

 Reference Signs List 1 breaker 2 power supply circuit 3 computer 4 alarm temperature detector 5 trip temperature detector 6 OR circuit 7 delay timer 8 OR circuit 9 NAND circuit S1 shutdown processing signal S2 time setting signal S3 shutdown end signal S4 off signal

Claims (3)

[Claims] A power supply cut-off device for a computer configured to be supplied with power via a DC power supply connected to an AC power supply by a breaker, wherein an output is output when an ambient temperature of the computer exceeds a predetermined value at which an alarm is to be issued. A temperature detector that generates, a CPU that starts shutdown processing when an output of the temperature detector is given, calculates a predicted time required for the shutdown processing, and outputs a power-off signal after the elapse of the predicted time; A DC power supply that stops power supply to the computer based on a power-off signal; and a breaker that trips due to the stop of the DC power supply and stops power supply from the AC power supply to the DC power supply. Computer power shut-off device. 2. The computer power supply cutoff device according to claim 1, further comprising: a timer for generating an output after a lapse of a predetermined time longer than the predicted time from the start of the shutdown processing from the CPU. A power cut-off device for a computer, which also trips the breaker. 3. The power cutoff device according to claim 1, wherein the temperature detector further generates an output when an ambient temperature of the CPU exceeds a second predetermined value higher than a predetermined value at which the alarm should be issued. A power cutoff device for a computer, wherein the timer operates according to the second predetermined value.