JPH08126191A - Electronic circuit module cooling equipment - Google Patents

Abstract

PURPOSE: To safely protect an electronic circuit module from heating by outputting a second stage set temperature excess signal when the temperature of the module measured by a temperature measuring equipment exceeds the preliminarily set second stage set temperature value and thereby stopping the supply of power to the electronic circuit module. CONSTITUTION: A second stage temperature set equipment 31b outputs a signal to an alarm detection circuit 25 when the module temperature measured either by temperature sensors 16a or 16b exceeds the second stage set temperature value set by a temperature set circuit 30b. A fan driving circuit 33 starts up a fan 28 on a first stage set temperature excess signal from a first stage temperature setting equipment 31a. An alarm detection circuit 25 stops the power supply to an electronic circuit module on the second stage set temperature excess signal from the second stage temperature setting equipment 31b and outputs a display signal to an alarm display lamp 25a. By this method, the electronic modules can be monitored for an abnormal rise in temperature one by one and thereby the appearance of a hot spot can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling system for an electronic control unit having a structure in which a plurality of electronic circuit modules each having an electronic component mounted therein are housed in a chassis having a frame structure, for preventing a temperature rise in the electronic circuit module due to heat generation of the electronic components. Regarding the device.

[0002]

2. Description of the Related Art In recent years, electronic control devices have been improved in performance and function, and electronic parts to be used have been highly integrated and highly integrated. Therefore, in an electronic circuit module composed of a plurality of electronic components, it is necessary to cool the temperature rise caused by heat generation of the electronic components.

A plurality of these electronic circuit modules are mounted on an electronic circuit unit having a rack structure. In this case, the cooling of the electronic circuit module is generally forcedly cooled by a fan in the entire electronic circuit unit.

In this electronic circuit module cooling device, an electronic circuit module is mounted on a printed circuit board. Electronic components use high-speed elements such as high-density gate arrays and microprocessors, and generate a lot of heat. Moreover, the heat-generating components of the electronic circuit module are forcedly cooled by air cooling. The forcedly cooled air is exhausted to the back of the electronic circuit unit.

In addition, an exhaust space is provided beside the electronic circuit unit, and a partition plate in the exhaust space exhausts the exhaust gas to the rear surface of the electronic circuit unit.

[0006]

In the case of such an electronic circuit module cooling device, the intake and exhaust areas are required, the electronic circuit unit becomes larger than the width of the electronic circuit module, and the electronic circuit unit is housed in a rack structure. There is a drawback that the installation area of the housing is large.

Further, when the electronic circuit units are stacked, the area of the intake / exhaust area becomes large, and the mounting efficiency is lowered. Further, since a fan module is provided for each electronic circuit unit and cooling is performed by a fairly powerful fan, there is a drawback that noise increases. Moreover, since the heat generation is not controlled for each electronic circuit module unit, hot spots may occur depending on the electronic circuit module, and electronic parts may be destroyed. Even if the module heats up and ignites, there is a risk of continuing to supply power to the electronic module.

The present invention has been made in view of the above situation, in which temperature control is performed for each electronic circuit module unit, and when the temperature exceeds a preset temperature, the inside of the electronic module is cooled and an alarm is issued when an abnormal temperature rise occurs. While outputting
An electronic circuit module cooling device that shuts off power supply to an electronic module is provided.

[0009]

An electronic circuit module cooling device according to the present invention includes a temperature measuring device installed in an electronic circuit module for measuring a module temperature, and a first module temperature in which the module temperature measured by the temperature measuring device is predetermined. A first stage temperature setter that outputs a first stage set temperature excess signal when the set temperature value of the stage is exceeded, and a fan that is started by an output signal from the first stage temperature setter and cools the electronic circuit module An apparatus, a second stage temperature setter that outputs a second stage set temperature excess signal when the module temperature measured by the temperature measuring device exceeds a predetermined second stage set temperature value, and a second stage temperature setting The power cutoff device cuts off the power supply to the electronic circuit module according to the output signal from the device.

[0010]

In the electronic circuit module cooling device of the present invention, the temperature measuring device is installed in the electronic circuit module to measure the module temperature, and the module temperature measured by the temperature measuring device is the preset temperature of the first stage. When the value exceeds the value, the 1st stage set temperature excess signal is output, the fan device is activated by the output signal from the 1st stage temperature setter to cool the electronic circuit module, and the module temperature measured by the temperature measuring device It is characterized in that when a preset second stage set temperature value is exceeded, a second stage set temperature excess signal is output to cut off the power supply to the electronic circuit module.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the electronic circuit module cooling device of the present invention will be described with reference to FIGS. FIG.
FIG. 4 is a diagram showing a case where a cooling device for an electronic circuit module according to an embodiment of the present invention is mounted in a housing. Figure 2
It is a figure which shows the structure of the electronic circuit module cooling device in the Example of this invention. FIG. 3 is a functional block diagram of the electronic circuit module cooling device in the embodiment of the present invention.

In FIG. 3, reference numeral 15 denotes a fan control circuit for controlling activation of a fan device 28 described later, which is installed in the electronic circuit module 13 shown in FIG. 2 to measure temperature of the modules 16a and 16b, and a fan device described later. First stage temperature setting circuit 30a that presets the temperature for starting 28 in the module, second stage temperature setting circuit 30b that shuts off the power supply and sets the temperature at which the alarm is displayed, and temperature sensors 16a and 16b. If the module temperature measured by either of the temperature sensors 16a and 16b exceeds the first-stage set temperature value set by the temperature setting circuit 30a, the first-stage setting excess signal will be described later. Module temperature measured by one of the first-stage temperature setter 31a and the temperature sensors 16a and 16b output to the fan drive circuit 33 The second set by temperature setting circuit 30b
The first from the second-stage temperature setter 31b and the first-stage temperature setter 31a, which outputs a second-stage set temperature excess signal to an alarm detection circuit 25, which will be described later, when the set-temperature value of the second stage is exceeded.
A fan drive circuit 33 that activates the fan 28 by a stage setting excess signal, shuts off the power supply to the electronic circuit module 13 by the second stage setting temperature excess signal from the second stage temperature setter 31b, and an alarm indicator lamp described later. The alarm detection circuit 25 outputs a display signal to 25a. A fan device 28 is activated by a signal from the fan drive circuit 33 to cool the electronic circuit module 13. Two
5a is turned on by a display signal from the alarm detection circuit 25 and displays a warning.

As shown in FIG. 2, the cooling device for the electronic circuit module 13 according to the present embodiment has a temperature sensor 16 for detecting the temperature inside the electronic circuit module 13.
a, 16b and a fan drive circuit 33 that receives signals from the temperature sensors 16a, 16b and controls the cooling fans 28a, 28b, and the cooling fan 28 and the temperature setting knob 24 are provided in front of the electronic circuit module 13. Also, the front panel 23 provided with the alarm indicator light 25a is attached with one touch, and the on / off of the fans 28a and 28b is controlled by the set temperature.

The cooling device for the electronic circuit module 13 has a structure in which the electronic circuit module unit is used.
Since the air is exhausted to the two exhaust ports 22a, 22b, 22c, a dedicated intake area or exhaust area is not required. The number of fans 28a and 28b mounted on the front panel 23 and the mounting angle thereof can be changed. Further, the fan 28 is turned on / off depending on the set temperature of each electronic circuit module. When the temperature inside the electronic circuit module rises abnormally, an alarm is output and then the power supply to the electronic circuit module 13 is cut off.

As shown in FIGS. 1 and 2, the cooling device of the present embodiment has an electronic circuit unit 11 having a chassis structure in which a plurality of electronic circuit modules 13 are mounted, and a back panel board 12 is provided on the back surface. The signal connector 18 and the signal connector 17 of the electronic circuit module 13 are electrically connected. An electronic component 14 is mounted on the electronic circuit module 13. In addition, the electronic circuit module 1
In order to monitor the temperature of No. 3, temperature sensors 16a and 16b are installed at arbitrary positions and signals are connected to the fan control circuit 15. On the front side of the electronic circuit module 13, fixing fittings 27a, 27b for fixing the front panel 23 and fan control connectors 19, 20 for sending control signals to the fans 28a, 28b of the front panel 23 are mounted.

Reference numeral 17 is a signal connector of the electronic circuit module 13, 29 is an air filter, 30a is a temperature setting circuit, and 25a is an alarm indicator lamp.

First, the electronic circuit module 13 is pushed in along the card guides 21a and 21b to be fitted and connected to the signal connector 18 of the back panel board 12. next,
While fitting the fan control connectors 19 and 20 on the front panel 23, the fixing pins 26a,
26b is inserted and fixed with one touch.

A fan driving temperature is set by the temperature setting knob 24 of the front panel 23. The optimum temperature is selected as the set temperature depending on the mounting condition of the heat generating component of the electronic circuit module. Therefore, the set temperature can be selected for each electronic circuit module.

The alarm indicator lamp 25a is turned on when the temperature determined by the temperature control circuit 31 is exceeded. When the power is turned on with such a connection structure, the fans 28a and 28b mounted on the front panel of the electronic circuit module are initially in a stopped state. When the temperature in the electronic circuit module gradually rises and exceeds the temperature set by the temperature setting knob 24, the temperature sensors 16a and 16b operate and a signal is output to the fan drive circuit 33 through the temperature control circuit 31. As a result, the fans 28a and 28b operate to take in air from the intake port 34 of the front panel 23 and exhaust ports 22a to 22c provided on the back panel board 12.
Exhausted from.

When the temperature further rises and exceeds the alarm set temperature even though the fans 28a and 28b are operating, the alarm indicator lamp 25a is turned on and the alarm signal of the alarm output device of the computer system is output. To do.
The alarm set temperature can be set either with the alarm temperature setting knob on the front panel or within the temperature control circuit. Whether or not the power supply to the electronic circuit module is shut off due to an abnormal temperature rise is determined by the warning output of the computer system. The air flows as shown in FIG. 2, and the fans 28a, 28
The electronic component 14 is cooled by b, and the exhaust ports 22a to 2a
Exhausted from 2c.

As described above, by setting the temperature inside the module for each electronic circuit module and turning on / off the cooling fan, it is possible to obtain a cooling structure with less noise and good mounting efficiency. Further, abnormal temperature rise of each electronic module can be monitored, and hot spots can be prevented.

FIG. 5 shows an embodiment in which the cooling fan of the front panel 23 is mounted at an angle. When the heat-generating component cannot be placed near the cooling fan or when the central portion of the electronic circuit module is desired to be intensively cooled. Is an effective method. Then, the front panel 23 and the display substrate 41 are attached to the fan panel 40 by the panel fixing screws 44 and the fixing metal fitting screws 4.
3, attached by the fan panel fixing screw 42.

Further, the electronic circuit module which generates less heat can be flexibly adapted to various electronic circuit modules by changing the front panel, such as using one cooling fan.

As described above, according to the present embodiment, the cooling and temperature control of each electronic circuit module can be performed, the RAS function can be improved, and the fan operates according to the temperature inside the electronic circuit module, which reduces noise. Be useful. Also, since various cooling performances can be selected simply by changing the front panel, a highly flexible cooling method can be obtained.

[0025]

According to the present invention, it is possible to obtain a space-efficient cooling structure without requiring a large intake / exhaust area.

[Brief description of drawings]

FIG. 1 is a perspective view showing a case where an electronic circuit module cooling device according to an embodiment of the present invention is mounted in a housing.

FIG. 2 is a side sectional view of FIG. 1 showing a configuration of an electronic circuit module cooling device in an embodiment of the present invention.

FIG. 3 is a functional block diagram of the electronic circuit module cooling device in the embodiment of the present invention.

FIG. 4 is an explanatory view showing a case where the cooling fans of the electronic circuit module cooling device in the embodiment of the present invention are mounted at an angle.

FIG. 5 is an exploded perspective view of the electronic circuit module cooling device in the embodiment of the present invention.

[Explanation of symbols]

 16a, 16b Temperature sensor 25 Alarm detection circuit 28 Fan 30a, 30b Temperature setting circuit 31a, 31b Temperature setting device

Claims (1)

[Claims] 1. A temperature measuring device which is installed in an electronic circuit module to measure a module temperature, and when the module temperature measured by the temperature measuring device exceeds a preset first stage set temperature value. A first-stage temperature setting device that outputs a one-stage set temperature excess signal, a fan device that starts by the output signal from the first-stage temperature setting device and cools the electronic circuit module, and the temperature measuring device measured A second-stage temperature setter that outputs a second-stage set temperature excess signal when the module temperature exceeds a predetermined second-stage set temperature value, and an output signal from the second-stage temperature setter An electronic circuit module cooling device comprising: a power cutoff device that cuts off power supply to an electronic circuit module.