JPH09153692A - Cooling fan system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost for replacing a cooling fan by providing outside an indication of the appropriate time to replace a cooling fan of apparatus. SOLUTION: Sensor contacts 14 for sensing the operation and stop of cooling fans 11 working in a box contg. an apparatus are attached to the fans to indicate the working condition of the fans 11 by indication lamps 13 according to the outputs of the contacts 14 whereby the replacement time is informed by operating the lamp 13 when the fan stops.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling fan system capable of efficiently maintaining a fan for cooling equipment such as an electronic control panel.

[0002]

2. Description of the Related Art FIG. 11 is a schematic diagram showing a cross section of a conventional electronic control panel. In the figure, 1 is a box forming the outer shell of the electronic control panel, 2 is a rear door of the box 1, 3 is a front door of the box 1; 4 is a panel fan assembly containing a plurality of panel fans 5 for introducing air into the electronic control panel; 6 is a plurality of units for cooling an in-panel unit containing print cards and the like. A unit fan assembly accommodating the fan 7, 8 is an in-board unit accommodating a control device such as a print card, and 9 is an exhaust port provided in the lower portion of the front door 3.

Next, the operation will be described. The box 1 is composed of a main body, a rear door 2 and a front door 3. As a method of cooling the print card or the like housed in the in-board unit 8, air can be cooled in the in-board unit 8 by the unit fans 7 in the unit fan assembly 6 mounted on the upper part of the in-board unit 8. To cool down. The warm air discharged from the in-board unit 8 is
Is cooled by the outside air introduced into the panel by the panel fan 5, and the exhaust port 9 at the bottom of the front door 3 which is the only outlet
It is pushed out from and is discharged out of the box 1. Board fan 5 and unit fan 7 that are the keys of these cooling methods
Is continuously operated because it must be operated for cooling while the electronic control device such as a print card is operating.

[0004]

Although the conventional operation system of the electronic control panel cooling fan is constructed as described above, the fan, which is a rotating body, has a life and needs to be replaced periodically. However, in the past, the system does not indicate that the fan has stopped, so the fan is replaced for preventive maintenance when the fan is operating. Therefore, there has been a problem that the replacement fan part cost and the replacement work cost increase more than necessary.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a system capable of extending the cooling fan replacement time to the maximum.

[0006]

In the cooling fan system according to the present invention, each of a plurality of cooling fans operated in a box for housing equipment is provided with a sensor for detecting operation and stop, and a fan is output by the sensor output. The operating state of is displayed outside the box.

Further, in the above structure, the display of the operating state of the fan is performed by the indicator lamp provided corresponding to each fan.

Further, in the above structure, the operation state of the fan is displayed by processing the sensor signal from each fan and displaying the position of the stopped fan on the character display.

Further, in the above configuration, the display of the operating state of the fan is performed by processing the sensor signal from each fan and transmitting the processed signal to the receiving side at the distant location from the stopped fan position.
The position is displayed on the receiving side.

Further, in the above structure, the operation state of the fan is displayed by processing the sensor signal from each fan and deactivating the locking electromagnet of the box door when the number of stopped fans reaches a predetermined number. Displayed by opening the box door.

Further, the operating times of a plurality of cooling fans that are operated in the box housing the equipment are integrated, and when the predetermined operating time is reached, a display signal is output to the outside.

In the above structure, the cooling fan is
The operation is started when the temperature inside the panel reaches a predetermined temperature or higher.

In the above structure, the cooling fan is
The vehicle is operated with a rest period during the operation, and the rest periods are sequentially shifted.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. An embodiment of the present invention will be described below with reference to the drawings. 1 and 2, 11 is a board fan or a unit fan (corresponding to 5 or 7 in FIG. 11),
Reference numeral 12 is an indicator light driving power source, 13 is an indicator lamp attached to the front door 3 of the electronic control panel box body as shown in FIG. 2, one indicator lamp is provided for each fan, and indicator lamps for a plurality of fans are provided. Are arranged together. Reference numeral 15 denotes a fan mounting position display plate that displays which fan each indicator corresponds to. Reference numeral 14 is a contact point of a sensor which is attached to each fan 11 and detects the rotation and stop state of each fan.

Next, the operation will be described. In FIG. 1, a fan 1 with a sensor having a fan rotation detection sensor
The state of rotation or stop of 1 is taken out by the sensor contact 14. The sensor contact 14 is opened when the fan is rotating and is closed when the fan is stopped. Therefore, when the rotation of the fan 11 is stopped, the indicator light driving power source 1
A current path is formed from the positive side of 2 to the sensor contact 14, the indicator lamp 13, and the negative side of the indicator lamp driving power source 12,
The indicator light 13 lights up. When the indicator light is turned on, it is possible to recognize which fan in the panel has stopped by the fan mounting position display plate 15 provided on the upper part thereof. By confirming this display by daily inspection and replacing the fan, it is possible to extend the replacement of the fan until the final time when the fan needs to be replaced, and reduce the replacement cost.

Embodiment 2 In the first embodiment, the indicator light 13 is provided on the front door 3, but in this embodiment, as shown in FIGS. 3 and 4, one character indicator is provided on the front door 3 instead of the indicator light 13. 21 is installed, the signals from the sensor contacts 14 taken out from the plurality of sensor-equipped fans 11 in the panel are taken into the character display drive device 22, and the rotation and stop of the fan and the information of the fan mounting position are externally displayed by characters. I try to let you know. According to this, the space of the front door 3 occupied by the indicator light 13 and the fan mounting position display plate 15 required in the first embodiment can be reduced, and the stop fan position can be recognized at a glance.

Embodiment 3 In the first and second embodiments, the indicator light 13 and the character display 21 are attached to the electronic control panel front door 3 in which the fan is housed, but in this embodiment, as shown in FIG. , The signal from the sensor contact 14 is taken in, the position of the fan is judged, the transmitter 31 having a built-in circuit for transmitting wirelessly is provided, and the receiver 32 is installed at a remote place. From the printer to the printer 33. According to this, by receiving signals from a plurality of electronic control boards with a single receiving device, it is possible to monitor the status of a plurality of fans of a plurality of electronic control boards at one place, and also the front door of the electronic control board. Since it is not necessary to attach anything to the, an inexpensive system can be constructed.

Embodiment 4 In the first to third embodiments described above, the stop of the fan is notified to the outside by the indicator lamp 13, the character display 21 and the printer 33. In this embodiment, as shown in FIGS. 6 and 7. , The electronic control board box body 1 is provided with an electromagnet 43, and normally the electromagnet 43 is used to connect the front door 3
Control that has an abnormal signal contact 42 that operates when the number of stopped fans exceeds a certain number by capturing signals from the sensor contacts 14 of a plurality of fans A device 41 is provided. Control device 4
When the abnormal signal contact 42 is opened by the operation of 1, the electromagnet 43 is deenergized and the front door 3 is opened. If necessary, the operation of the abnormal signal contact 42 is taken out to the outside by another contact, and the display means informs that the door is open.
According to this, the opening of the front door 3 indicates the time when the fan needs to be replaced, so that an inexpensive system can be obtained.

Embodiment 5 In the above-described first to fourth embodiments, the fan replacement time is displayed by the method of recognizing the rotation and stop of the fan and notifying the outside, but in this embodiment, as shown in FIG. 8 and FIG. In addition, the fan replacement period is extended to the maximum without providing a sensor for each fan, and it is displayed. In the example of FIGS. 8 and 9, the temperature inside the electronic control panel is controlled by the temperature detector 5.
1 and takes this into the fan operation control device 52, and operates the fan operation signal contact 53 only when the temperature reaches a level that interferes with the operation of the in-board unit 8 of the electronic control board storage, and the fan operation signal contact 53 is operated. Operate the fan 11. Further, the fan operation time is integrated in the fan operation control device 52, and when the specified replacement time is reached, a replacement timing signal is output from the contact 54 to the outside. According to this, since the fan does not operate more than necessary and the fan does not need to have a sensor, the fan replacement period can be extended and the unit cost of the fan can be kept low.

Embodiment 6 In the fifth embodiment, all the fans in the electronic control panel are controlled to operate and stop at the same time. In this embodiment, in order to control each fan individually, as shown in FIG. 10, an operation signal contact 53 is provided for each of the fans 5 and 7, and the operation time is counted in the fan operation control device 61. Incidentally, by replacing one or two of the plurality of fans in the board fan assembly 4 and the unit fan assembly 6 with a pause, and sequentially changing the paused fans, the overall fan replacement cycle is changed. Is to extend. When all the fans have reached the replacement time, the replacement timing signal is output from the contact 54 as in the fifth embodiment.

Incidentally, the above-mentioned first to sixth embodiments.
However, the present invention is not limited to the electronic control panel, and the present invention has the same effect for fans of all devices that use a cooling fan.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a main part of a cooling fan system according to a first embodiment of the present invention.

FIG. 2 is a front view showing a part of the front door of the box body of the cooling fan system according to the first embodiment of the present invention.

FIG. 3 is a circuit diagram showing a main part of a cooling fan system according to a second embodiment of the present invention.

FIG. 4 is a front view showing a part of the front door of the box body of the cooling fan system according to the second embodiment of the present invention.

FIG. 5 is a circuit diagram showing a main part of a cooling fan system according to a third embodiment of the present invention.

FIG. 6 is a circuit diagram showing a main part of a cooling fan system according to a fourth embodiment of the present invention.

FIG. 7 is a perspective view showing a part of a box body of a cooling fan system according to Embodiment 4 of the present invention.

FIG. 8 is a circuit diagram showing a main part of a cooling fan system according to a fifth embodiment of the present invention.

FIG. 9 is a schematic cross-sectional view showing a part of a box body of a cooling fan system according to Embodiment 5 of the present invention.

FIG. 10 is a circuit diagram showing a main part of a cooling fan system according to a sixth embodiment of the present invention.

FIG. 11 is a schematic cross-sectional view showing a box body of a conventional cooling fan system.

[Explanation of symbols]

1 box, 3 front door, 4 board fan assembly, 5 board fan, 6 unit fan assembly, 7 unit fan,
8 in-board unit, 11 fan, 12 indicator light drive power supply, 13 indicator light, 14 sensor contacts, 21 character display device, 22 character display device drive device, 31 transmitter device, 32
Receiving device, 33 printer, 41 control device, 42
Abnormal signal contact, 43 Electromagnet, 51 Temperature detector, 52
Operation control device, 53 Fan operation signal contact, 54 contact, 61 Fan operation control device.

Claims (8)

[Claims] 1. A sensor for detecting operation and stoppage is provided for each of a plurality of cooling fans that are operated inside a box that houses equipment, and the output of the sensor is used to display the operating state of the fan outside the box. Cooling fan system characterized by 2. The cooling fan system according to claim 1, wherein the display of the operating state of the fan is performed by an indicator lamp provided corresponding to each fan. 3. The cooling according to claim 1, wherein the operation status of the fan is displayed by processing a sensor signal from each fan and displaying the position of the stopped fan on a character display. Fan system. 4. The operation status of the fan is processed by processing a sensor signal from each fan, transmitting the position of the stopped fan to a receiving side at a remote place, and displaying the position on the receiving side. The cooling fan system according to any one of claims 1 to 3, characterized in that. 5. The operation status of the fan is displayed by processing a sensor signal from each fan and deactivating the locking electromagnet of the box door when the number of stopped fans reaches a predetermined number. The cooling fan system according to claim 1, wherein the display is made by opening the cooling fan system. 6. A cooling method characterized in that the operating time of a plurality of cooling fans that are operated in a box that accommodates equipment is integrated and a display signal is output to the outside when a predetermined operating time is reached. Fan system. 7. The cooling fan system according to claim 6, wherein operation of the cooling fan is started when the temperature inside the panel reaches a predetermined temperature or higher. 8. The cooling fan system according to claim 6 or 7, wherein the cooling fan is operated with a rest period during operation, and the rest periods are sequentially shifted.