JPH05145260A - Fan unit - Google Patents

Abstract

PURPOSE:To reduce cost of the device, improve the noise property, cope with it easily even in the case that all fans are not connected, improve the productivity, find out an abnormal place easily even in the computer system wherein a plurality of fan units are used, and shorten the maintenance time, by obviating connection cables. CONSTITUTION:This unit has a plurality of fans 2, which have revolution abnormality detecting means A for detecting the abnormality of revolution by the output of a level, and an alarm processing circuit 3, which processes the abnormality alarm from the revolution detecting means A, and a plurality of fans 2 and the alarm processing circuit 3 are arranged inside the same unit 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan unit, and more particularly to a fan unit having a mechanism for processing an abnormal alarm of a fan for cooling electronic equipment.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram showing a configuration of a conventional fan abnormality warning processing mechanism.

In FIG. 2, 10 is a fan unit, and each fan 10a has a rotation abnormality detecting circuit 10b.
It is composed of a plurality of fans having. An alarm processing box 11 is a box that is connected to each fan of the fan unit 10 by a connection cable 12 and processes an alarm signal from each rotation abnormality detection circuit 10b. 13 is a jumper connector (described later), 8
Is a contact output terminal.

Next, the operation of the above conventional example will be described with reference to FIG.

In FIG. 2, when the fan 10a is connected, the rotation level detection circuit 10b incorporated in the fan 10a functions to detect an abnormality in the fan 10a, such as rotation stop, and the alarm level output signal is low ( It changes from Low to High. This output signal is taken into the alarm processing box 11, each signal OR is taken, converted into a contact output, and output from the contact output terminal 8 to the outside. When the fan 10a is not connected, the input terminal of the alarm processing box 11 becomes High, which is the same state as when the above abnormality is detected. In this case, the jumper plug 13 short-circuits the alarm level output to Hi.
This state can be avoided by changing the level from gh to Low.

[0006]

In the fan abnormality alarm processing mechanism of the above-mentioned conventional example, since the fan unit and the alarm processing section are separated, a connecting cable is required and the number of fans is greater than the number of input contacts of the alarm processing box. There was a problem that it was necessary to short the input contacts with a jumper connector when the number was small. Further, when connecting a plurality of fan units, it is impossible to identify which fan unit is abnormal.

The present invention has been made in order to solve the above-mentioned problems. It eliminates the need for a connecting cable, reduces the cost of the device, improves the noise characteristics, improves the quality of the device, and connects all the fans. Even if it is not done, you can easily deal with it, improve productivity, and easily find an abnormal place even in a computer system that uses multiple fan units,
The purpose is to reduce maintenance time.

[0008]

Therefore, in the present invention, a plurality of fans having a rotation abnormality detecting means for detecting the rotation abnormality by the level output, and an alarm for processing the abnormality alarm from the rotation abnormality detecting means. And a plurality of fans, and the alarm processing means are arranged in the same unit to solve the above problems and achieve the above object. ..

[0009]

In the fan unit of the present invention, the rotation abnormality detecting means of the plurality of fans detect the rotation abnormality by the level output, and the rotation processing is performed by the alarm processing means arranged in the same unit as the plurality of fans. The abnormality alarm from the abnormality detecting means is processed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an electric circuit diagram showing a circuit configuration of a fan unit according to an embodiment of the present invention. In FIG.
A is a circuit abnormality detecting means, which is a means for detecting an abnormality in rotation by level output. B is an alarm processing means,
The alarm processing circuit 3 is a means for processing the abnormality alarm from the rotation abnormality detecting means A. Reference numeral 1 is a fan unit, which includes an alarm processing circuit 3 and a rotation abnormality detecting means A.
It is composed of a plurality of fans 2 having the above and other electronic parts. Reference numeral 4 is a switch arranged in the abnormality alarm processing circuit 3 to short-circuit the alarm input portion. Reference numeral 5 is also arranged in the alarm processing circuit 3 and is a light emitting diode indicating an abnormal state. 6 is a relay. 7 is a transistor. Reference numeral 8 is a contact output terminal.

Next, the operation of this embodiment will be described with reference to FIG.

In FIG. 1, at least one fan 2
When an abnormal rotation is detected, the alarm level output is Low
To High. This output is taken into the alarm processing circuit 3, the base voltage of the transistor 7 is saturated, and the collector current flows. Therefore, the relay 6 connected to the transistor 7 is driven and the light emitting diode 5 is turned on. The output contact 8 of the relay 6 is taken out of the alarm processing circuit 3 as it is. When the fan 2 is not connected, the level becomes Low by closing the switch 4 in the alarm processing circuit 3, and it is no longer recognized as a circuit abnormality.

[0014]

As described above, according to the present invention, since the alarm processing means is built in the fan unit, the connection cable is not required, the device can be made inexpensive, and the noise resistance is improved. Be peeled off.

Further, even if all the fans are not connected, it is possible to easily deal with the problem and the productivity can be improved. In addition, even in a computer system in which a plurality of fan units are used, it is possible to easily find an abnormal location, which has the effect of shortening maintenance time.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram showing a circuit configuration of a fan unit according to an embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of a conventional fan abnormality warning processing mechanism.

[Explanation of symbols]

 A rotation abnormality detecting means B alarm processing means 1, 10 fan unit 2 fan 3 alarm processing circuit 4 switch 5 light emitting diode 6 relay 7 transistor

Claims (1)

[Claims] 1. A plurality of fans having rotation abnormality detecting means for detecting rotation abnormality by level output, and alarm processing means for processing abnormality alarms from the rotation abnormality detecting means.
A fan unit comprising: the plurality of fans and the alarm processing means arranged in the same unit.