JPH0541590A - Cooling fan module unit - Google Patents

Abstract

PURPOSE:To provide rational redundancy by totalizing a power source and a fan. CONSTITUTION:In a cooling fan module unit for ventilating the air out of an apparatus having an electronic circuit having a heat generator to cool it, fan controllers 13 are respectively provided in respective cooling fan modules 12, and a fan 14 is so controlled as to rotate at a speed corresponding to the atmospheric temperature at the outside of the apparatus by power to be supplied from a common primary power source.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling fan module unit for air-cooling a device having an electronic circuit having a heat generating portion.

[0002]

2. Description of the Related Art An electronic circuit cannot exhibit a predetermined performance unless it is operated within a predetermined temperature range.
For this reason, a cooling fan is provided in a device having an electronic circuit having a heat generating portion to radiate heat and operate within a predetermined temperature.

A fan for cooling such a device rotates at a constant rotation speed. The rotation speed is set so that the heat-generating part is cooled below the permissible temperature even at the maximum temperature assumed as the external environmental condition of the apparatus, and therefore the rotation speed is high and the noise is large.

In order to improve this, there is used a method of detecting the air temperature outside the apparatus and controlling the output voltage of the cooling fan power source used in the entire apparatus based on this. In such a case, the power supplies are made redundant (redundant) in order to prevent power loss accidents.

FIG. 5 shows an example of such a redundant power supply. It is input from an AC power source, converted into high-voltage DC by the primary power supply unit 1, and converted into the rated voltage of the fan 3 by the secondary power supply unit 2. For the purpose of redundancy, the primary power supply unit 1 and the secondary power supply unit 2 are dually provided, and all the fans 3 can be driven with a single capacity.

[0006]

By the way, the number of the fans 3 is also made redundant. That is, duplication is performed, for example, by providing twice as many as the number required to cool the heat generating portion. Each primary power supply unit 1 and each secondary power supply unit 2 has a capacity capable of driving all the fans 3, and since the power supplies are also duplicated, the capacity required to drive the fans 3 is four times the capacity. Has become.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a cooling fan module unit having a reasonable redundancy by integrating a power supply and a fan.

[0008]

In order to achieve the above object, in a cooling fan module unit comprising a plurality of cooling fan modules for cooling the apparatus provided with an electronic circuit having a heat generating section by passing air outside the apparatus, A fan control unit is provided for each cooling fan module, and the fan is controlled by the electric power supplied from the common primary power source so that the rotation speed corresponds to the temperature outside the device.

Further, if a plurality of cooling fan modules are arranged with redundancy in the object to be cooled and a failure occurs in the plurality of cooling fan modules, the rotation speed of the remaining cooling fan modules becomes the maximum allowable rotation speed. To control.

[0010]

The fan control unit converts the high voltage supplied from the primary power supply into a voltage that corresponds to the temperature of the outside of the device and becomes the rotation speed of the fan, and supplies the voltage to the fan. The fan control unit is provided for each fan, and the number of fans is redundant with respect to the required number. Therefore, if the conventional secondary power supply unit doubles the redundancy, it becomes 4 times the required number of fans.
In the case of the present invention, which has a double capacity, it has a double capacity, which is the same as the redundancy of the fan, which is rationalized.

If a fan that cools the object to be cooled fails, the rotational speed of the remaining fans is set to the maximum permissible rotational speed so that the cooling capacity does not become insufficient.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a power supply configuration diagram of this embodiment, FIG. 2 is a configuration diagram of a control system of a cooling fan module, and FIG. 3 is a peripheral configuration of a service function module that provides a support function necessary for automatic operation and maintenance of the system. FIG.

In FIG. 1, the primary power source unit 11 has an alternating current 100-
Converts 200V to 29V DC, cooling fan module 12,
It also serves as a power supply for the logic section. The primary power supply unit 11 is duplicated for redundancy. Cooling fan module
12 is an LE that lights up and displays the fan 14 and the operating state of the fan 14.
D15, a fan controller 13 for controlling the rotation speed of the fan 14. The fan control unit 13 converts 29V of the primary power source into 16 to 24V corresponding to the outside air temperature of the cooling target device,
Controls 14 rpm.

The primary power supply unit 11 also supplies power to the logic unit. In the logic section, this primary power supply section 11 and batteries 16 to 29
Power is supplied by V, and this is supplied by the secondary power supply unit 17 to 5 V depending on the target.
Or convert to 12V and supply power.

In FIG. 2, the system power control module 18 controls a plurality of cooling fan modules 12. The rotation instructing unit 19 determines the rotation speed of the fan 14 based on the output of the temperature sensor 22 that measures the outside air of the device provided in the cooling target device and instructs the fan control unit 13 to have the rotation speed. Supply voltage to fan 14. The rotation speed detection unit 20 detects the rotation speed of the fan 14. The display control unit 21 is LE when the failure occurs in the fan control unit 13 or the fan 14.
The failure display is lit on D15. The processor unit 23 monitors the output of the rotation speed detection unit 20, and also instructs the rotation instruction unit 19 of the fan 14 which backs up the output when a failure has occurred, the maximum allowable rotation speed and the display control unit 21. LED
Display the failure on 15. The system power control module 18 controls a predetermined number of cooling fan modules 12,
The system has a plurality of system power control modules 18.

Service function module (SF
M) 24 is a module that provides support functions necessary for automatic operation and maintenance of the system, and the configuration of its peripheral portion is shown in FIG. Floppy disk module FPD25 is used for customization and addition / change of software / firmware. The operation panel 26 consists of a liquid crystal display, lamps and switches, and can be turned on / off manually.
It disconnects, initializes the IPL (initial program load) path, and displays the abnormal status of various hardware.

The maintenance terminal 27 is used to connect a maintenance terminal used by maintenance personnel during maintenance.
It has a C interface. The SFM24 cooperates with the system power control module 18 to perform automatic power supply control and various alarm controls such as temperature / power supply / cooling.

FIG. 4 is a diagram showing an example of mounting the apparatus to be cooled in this embodiment. Fan modules FAN1 to FAN4
Has a redundant configuration for cooling the logic unit and the I / O unit, and rotates the fan so that air is taken in from the lower part of the device to be cooled and exhausted to the upper part. FAN1 and FAN3 and FAN3 and 4 are paired to form a redundant configuration.
Even if 1 fails, it is cooled by FAN2.

Next, the control of the rotation speed of the fan will be described. Normally, the temperature sensor 22 detects the outside air temperature of the cooling target device, and each cooling fan module is detected according to the temperature.
Twelve rpm instructions.

Next, an example of a combination of the outside air temperature and the output voltage of the fan controller 13 in the case of a 24V fan will be shown.

When a failure occurs in the cooling fan module 12, the cooling capacity decreases, so the maximum permissible rotation speed is controlled regardless of the outside temperature. In this case, the processor unit 23
Monitors the number of revolutions of each fan 14 from the output of the number-of-revolutions detection unit 20, and when it judges that a failure has occurred, the rotation instruction unit 19 of the fan 14 that is a backup of the fan 14 in which the failure has occurred The maximum allowable speed.

The processor unit 23 monitors the rotation speed of each fan 14. When the rotation speed detection unit 20 inputs the rotation speed detection pulse signal from the fan 14 and detects the rotation speed of each fan 14,
The processor unit 23 checks the normality of the rotation speed at regular intervals. When the failure of the fan 14 is judged from this abnormal rotation speed, the failure display is displayed on the LED 15 for the failed fan,
For the fan 14 that is a backup of the failed fan 14, the rotation instruction unit 19 is instructed of the maximum rotation speed. In addition, the display on the operation panel 26 and the notification to the software are SFM24.
Through.

[0023]

As is apparent from the above description, according to the present invention, the electric power supplied from the primary power source is converted into the voltage having the rotation speed corresponding to the outside air temperature by the fan control unit provided for each fan. Since it has a configuration and there is redundancy in the number of fans, the power supply and fans are combined to provide reasonable redundancy. Moreover, since the rotation speed corresponds to the outside air temperature, rational cooling is performed.

[Brief description of drawings]

FIG. 1 is a diagram showing a power supply configuration according to an embodiment of the present invention.

FIG. 2 is a diagram showing a control system configuration of an embodiment.

FIG. 3 is a service function module (SF having a supporting function necessary for automatic operation and maintenance of the system.
It is a figure which shows the structure of the peripheral part of M).

FIG. 4 is a diagram in which the present embodiment is mounted on a device to be cooled.

FIG. 5 is a diagram showing a conventional power supply configuration.

[Explanation of symbols]

 11 Primary power supply section 12 Cooling fan module 13 Fan control section 14 Fan 15 LED 18 System power control module 19 Rotation instruction section 20 Rotation speed detection section 21 Display control section 22 Temperature sensor 23 Processor section 24 Service function module 26 Operation panel

Claims (2)

[Claims] 1. A cooling fan module unit comprising a plurality of cooling fan modules for cooling the apparatus provided with an electronic circuit having a heat generating section by ventilating air outside the apparatus, wherein a fan control section is provided for each cooling fan module. A cooling fan module unit characterized in that the fan is controlled by the electric power supplied from the common primary power source so that the rotation speed corresponds to the temperature outside the device. 2. A plurality of cooling fan modules are arranged with redundancy in a cooling target part, and when a failure occurs in the plurality of cooling fan modules, the rotation speed of the remaining cooling fan modules becomes the maximum allowable rotation speed. The cooling fan module unit according to claim 1, wherein the cooling fan module unit is controlled as follows.