JP2001244676A - Fan unit and electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To actualize high-reliability and high-precision heat control by actualizing redundant constitution of a heat control system while reducing cooling fans. SOLUTION: Cooling fans 11 and 12 are arranged on opposite wall surfaces of an equipment housing 10 which contains an electronic circuit unit (not illustrated), and one of those cooling fans 11 and 12 is selectively driven to take the outside air in the equipment housing from the other side and circulate in the equipment housing 10, thereby performing thermal control over the electronic circuit unit (not illustrated).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device such as an optical transmission device and a telephone exchange device used in an optical communication system, and a fan unit thereof.

[0002]

2. Description of the Related Art In general, in an electronic device, an electronic circuit unit is housed and arranged in the device housing, and heat generated by driving the electronic circuit unit is forcibly exhausted to the outside of the device housing by using a cooling fan. A thermal control method is adopted. When such a heat control method is applied to an electronic device that is constantly driven, the life of the cooling fan is shorter than the life of the electronic circuit unit or the like.
For example, two fan units are assembled and arranged, and these two cooling fans are driven to execute heat control of the electronic circuit unit.

[0003] With the above configuration, when one of the cooling fans in the fan unit fails, maintenance and inspection including replacement of the failed cooling fan is performed in the driving state of one of the non-failed cooling fans. Thus, continuous driving of the electronic circuit unit is realized.

However, in the case where the fan unit mounted on the electronic device has a plurality of device housings, a plurality of cooling fans are provided for each device housing. In this case, the number of cooling fans is very large because the number of cooling fans is increased.

In addition, a cooling fan is disposed around a device housing in which an electronic circuit unit is housed, and the cooling fan is used for a heat control type electronic device in which exhaust gas in the device housing is forcibly exhausted. In this case, there is a problem that the installation location is determined according to the arrangement position of the cooling fan, and the handling is troublesome.

[0006]

As described above, in a heat control type electronic apparatus in which a conventional cooling fan is assembled and arranged and the heat is forcibly controlled by using the cooling fan, the arrangement of the cooling fan is limited. Accordingly, there is a problem that the installation place is restricted.

Further, in the conventional fan unit, there is a problem that if the heat control system is redundantly configured, the number of cooling fans increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides an electronic apparatus capable of realizing highly reliable and accurate thermal control and diversifying the usage form. With the goal.

Another object of the present invention is to provide a fan unit capable of realizing highly reliable and accurate heat control while reducing the number of cooling fans.

Further, the present invention can realize highly reliable and accurate heat control while reducing the number of cooling fans.
Further, it is another object of the present invention to provide a fan unit capable of diversifying usage patterns.

[0011]

According to the present invention, there is provided an equipment housing for accommodating an electronic circuit unit, first and second cooling fans provided on different walls of the equipment housing, and the first and second cooling fans. An electronic device is provided with fan control means for selectively driving at least one of the cooling fans of No. 2 to take in outside air into the device housing and exhausting the outside air to the outside of the device housing.

According to the above configuration, the outside air is taken into the equipment housing by controlling the drive so as to drive one of the first and second cooling fans and stop the other, for example, so that the other side is provided. Can be exhausted from. Therefore, the installation locations of the device housing can be diversified, and the handling thereof can be simplified.

According to the present invention, the electronic circuit unit is accommodated in a plurality of equipment housings each having a ventilation hole on a wall, and the ventilation openings of the plurality of equipment housings are provided. The fan unit includes a unit housing provided between the device housings so as to cover the device housing and provided with at least one more cooling fan than the plurality of device housings.

According to the above configuration, the fan unit provided with at least one cooling fan at least one more than the plurality of equipment housings is attached and arranged so as to cover the ventilation holes of the plurality of equipment housings. Only by providing one more cooling fan than the number of equipment housings, a highly reliable thermal control is realized while realizing a redundant configuration of thermal control of a plurality of equipment housings.

According to the present invention, the electronic circuit unit is housed, and is mounted on a plurality of equipment housings provided with ventilation holes on the wall, and is formed so as to be selectively releasable. A unit housing provided with a plurality of connection ports and a plurality of fan attachment ports, a duct member communicating with one of the plurality of ventilation ports of the device housing and any of the plurality of connection ports of the unit housing, The fan unit is provided with a plurality of cooling fans selectively mounted in at least one of the plurality of fan mounting portions of the unit housing, which is at least one more than the number of the device housings.

According to the above configuration, the ventilation holes of the plurality of equipment housings and the plurality of connection portions of the unit housing are communicated with each other through the duct member. By simply arranging the cooling fans in at least one more fan mounting section than the number of the fan mounting sections, a redundant configuration of the heat control system according to the arrangement configuration of the plurality of device housings is realized. Therefore,
Highly reliable thermal control is realized using a minimum number of cooling fans, and it is possible to selectively construct the optimal thermal control system according to the arrangement configuration of the equipment housing, diversifying the usage form Can be achieved.

According to the present invention, there is provided an electronic circuit unit which is mounted on two or more equipment housings each having a ventilation hole on a wall surface, wherein the two or more equipment housings are provided. Having a connection port attached to one ventilation port in the body,
A first unit housing in which a plurality of cooling fans are provided;
The first unit housing is communicatively attached to the first unit housing, and the other one of the two or more device housings is connected to the first unit housing.
A fan unit is provided with one or more second unit housings, each having a connection port attached to the ventilation opening of one of the equipment housings and provided with at least one cooling fan.

According to the above construction, the first and second unit housings are connected to the ventilation openings of the plurality of equipment housings at the connection ports of the first and second unit housings, and the first and second unit housings are communicated with each other. Accordingly, a redundant configuration of a thermal control system according to the arrangement configuration of a plurality of device housings is realized only by providing at least one cooling fan more than the number of device housings. Accordingly, highly reliable thermal control can be achieved using a minimum number of cooling fans, and an optimal thermal control system can be selectively constructed according to the arrangement configuration of the device housing. Can be diversified.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an electronic apparatus and a fan unit according to the present invention will be described in detail with reference to the drawings.

First Embodiment First, an electronic apparatus according to a first embodiment will be described with reference to FIGS. That is, the device housing 10 is formed in, for example, a box shape,
A heating element, for example, an electronic circuit unit (not shown) is accommodated and disposed inside the heating element. Cooling fans 11 and 12 are provided in the device housing 10 so as to face the opposing walls of the peripheral wall. Filters 13 and 14 are detachably attached to the cooling fans 11 and 12, for example, on the outside of the housing (see FIG. 2).

The cooling fans 11 and 12 are provided with external changeover switches 111 and 121 as shown in FIG.
Is provided, and a control unit 15 is connected to the control signal input terminal.
Is connected. The control unit 15 includes the cooling fan 1
When one of them is driven in accordance with the setting mode, outside air is taken into the equipment housing 10 through the other cooling fan 11 (12) and circulated into the equipment housing 10. After that, one cooling fan 12 (11)
It is exhausted outside. On the other hand, changeover switches 111 and 121
Is selectively switched in accordance with, for example, the installation location of the device housing 10 to set the cooling fans 11 and 12 to be turned on and off.

In the above configuration, the cooling fans 11, 12
For example, the changeover switches 11 and 12 are selectively switched according to the installation state of the device housing 10. here,
When the electronic circuit unit (not shown) is driven, the control unit 15 controls driving of, for example, one of the cooling fans 11 (12) to remove outside air to the filter 13 (14) and the other cooling fan 12 (11). ) Is taken into the device housing 10. This air is circulated in the equipment housing 10 and is exhausted out of the equipment housing 10 through one cooling fan 11 (12) and the filter 13 (14). Here, the device housing 10
In the above-mentioned electronic circuit unit (not shown), the amount of heat accompanying its driving is exhausted to be thermally controlled.

At this time, the control unit 15 controls the driving and stopping of one of the cooling fans 11 (12) at predetermined time intervals in accordance with the set mode to take in outside air into the equipment housing 10 and Performs thermal control of an electronic circuit unit (not shown).

The cooling fans 11 and 12 are set in such a manner that the switches 111 and 121 are turned on and the drive fans 11 and 12 are drivable when the equipment housing 10 is installed in a state where both can be driven. Is done. Here, when the electronic circuit unit (not shown) is driven, for example, the control unit 15 controls the driving of one of the cooling fans 11 (12) to remove the outside air to the filter 13 (14) and the other cooling fan. It is taken into the equipment housing 10 through 12 (11). This air is circulated in the device housing 10 and is exhausted out of the device housing 10 through one of the cooling fans 11 (12) and the filter 13 (14).

Here, the electronic circuit unit (not shown) in the equipment housing 10 is thermally controlled by exhausting the amount of heat accompanying its driving. At this time, one cooling fan 11
The air exhausted from (12) is supplied to the cooling fan 11 (1).
The dust adhering to the filter 13 (14) of 2) is removed from the device housing 1
The filter 13 (14) is blown off to clean the filter 13 (see FIG. 2).

After a predetermined period, one of the cooling fans 1
1 (12) is stopped and the other cooling fan 12
(11) is driven, and outside air is taken into the device housing 10 through the one cooling fan 11 (12). This air is circulated in the equipment housing 10 and the other cooling fan 12
From (11), the air is exhausted to the outside of the device housing 10. Here, the electronic circuit unit (not shown) in the device housing 10 is
The amount of heat accompanying the driving is exhausted and the heat is controlled. At this time, the air exhausted from the other cooling fan 12 (11) is filtered by the filter 14 (1) of the cooling fan 12 (11).
The dust adhering to 3) is blown out of the device housing 10 to clean the filter 14 (13) (see FIG. 2).

In the above description, the use of the cooling fans 11 and 12 has been described in the case of driving either one of the cooling fans. However, the present invention is not limited to this. Various forms of use are possible.

As described above, the electronic equipment is provided on the opposing wall surface of the equipment housing 10 in which the electronic circuit unit (not shown) is accommodated, and the cooling fans 11 and 12 are provided. By selectively driving one of the cooling fans 11 and 12 to take in outside air into the device housing 10 from the other side and circulate the same through the device housing 10, heat control of an electronic circuit unit (not shown) is performed. Was configured to be executed.

According to this, when drive control is performed such that one of the cooling fans 11 and 12 is driven and the other is stopped, outside air is taken in through the other of the cooling fans 11 and 12 of the equipment housing 10 and from one side thereof. The gas is exhausted, and thermal control of the electronic circuit unit (not shown) is performed. Accordingly, diversification of installation locations of the device housing 10 is realized, and handling thereof can be simplified.

In the above embodiment, the cooling fan 1
The case where the cooling fans 11 and 12 are assembled and arranged on different wall surfaces of the device housing 10 is described, for example, in the case where the cooling fans 11 and 12 are configured to be mounted on opposing wall surfaces of the device housing. The cooling fans 11 and 12 may be assembled.

(Second Embodiment) Hereinafter, a fan unit according to a second embodiment will be described with reference to FIGS. That is, the fan unit according to the second embodiment is used for heat control of an electronic device in which a plurality of, for example, two device housings 20 are stacked, and the unit housing 21 is, for example, a bottomed cylinder. A plurality of, for example, three, fan mounting portions 211 are provided at predetermined intervals on the bottom surface. The cooling fans 22 are attached to the fan attachment portions 211, respectively. These cooling fans 22 constitute, for example, three redundant fans.

On the other hand, the electronic equipment to which the unit casing 21 is mounted is a plurality of
It is composed of two device housings 20 at least one less than the number of 1, and each of the device housings 20 accommodates an electronic circuit unit (not shown). Further, ventilation holes 201 are provided on the wall surfaces of these device housings 20, respectively.
These device housings 20 are arranged in a stack with the ventilation holes 201 arranged side by side, and the opening side of the unit housing 21 is removably assembled between the device housings 20 via screws 25.
Here, the unit housing 21 includes the three cooling fans 2.
2, a redundant system is configured, and in a normal state, the internal air is sucked from the air vent 201 of each device housing 20 and exhausted to the outside in cooperation with each other.

With the above configuration, when the electronic circuit unit (not shown) of the equipment housing 20 is driven, three cooling fans 22 are driven in conjunction with this, and the cooling fans 22 are driven as shown in FIG. As shown in the drawing, the internal air is taken in from the ventilation holes 201 of each device housing 20 and exhausted to the outside of the unit housing 21 in cooperation with each other. As a result, the heat of the electronic circuit unit (not shown) is exhausted from the ventilation port 201 to the outside through the unit housing 21 in the device housing 20, and the heat control of the electronic circuit unit (not shown) is performed. Is performed.

The cooling fan 2 of the unit housing 21
In the case where one of the two failed, the other two units are driven and controlled, and the maintenance and inspection including the replacement of the failed one cooling fan 22 is performed in a state where the exhaust heat operation is being performed. As a result, the thermal control system constituted by the unit housing continuously controls the heat of the electronic circuit unit (not shown) even at the time of maintenance and inspection.

As described above, the fan unit is configured such that the two device housings 20 provided with the ventilation holes 201 on the wall surface on which the electronic circuit unit (not shown) is accommodated are stacked and arranged. So as to cover the ventilation opening 201 of the housing 20,
The unit housing 21 to which the number of cooling fans 22 at least one greater than the number of these two device housings 20 is attached is arranged.

According to this, the unit housing 21 provided with at least one cooling fan 22 at least one more than the number of the two device housings 20 is attached and arranged so as to cover the ventilation opening 201 of the device housing 20. Thus, a redundant configuration of each heat control system of the two device housings 20 can be realized only by providing the cooling fan 22 of the minimum source, and highly reliable heat control is realized.

In the above embodiment, the case where the present invention is applied to a configuration in which two device housings 20 are stacked is described. However, the present invention is not limited to this. In addition, three or more devices are stacked. The present invention is also applicable to a configuration or a configuration in which two or more device housings 20 are arranged side by side so that the ventilation holes 201 are arranged in parallel.

Further, in the above embodiment, the number of fan mounting portions 211 formed on the unit housing 21 is larger than that of the device housing 20 by one, and the cooling fan 22 is mounted on the fan mounting portion 211. Although the description has been given of the case where the number is formed as described above, it is also possible to configure so as to form more than this number.

Further, in the above embodiment, the unit casing 21 is formed in a bottomed cylindrical shape, and the ventilation port 2 of the equipment casing 20 is formed.
However, the present invention is not limited to this configuration. In addition, the unit housing 21 may be provided with a connection port to be connected to the ventilation port 201 of the device housing 20, and this connection may be performed. It is also possible to configure so that the mouth is connected to the ventilation opening 201 of the device housing 20 and assembled.

In the above embodiment, the unit housing 2
Although one fan mounting portion 211 is provided at least one more than the number of the device housings 20 and the thermal control system is configured to be redundant, the present invention is not limited to this. It is also possible to configure so that the same number of fan mounting portions 201 are provided in the unit housing 21.

(Third Embodiment) Hereinafter, a fan unit according to a third embodiment will be described with reference to FIGS. That is, the fan unit according to the third embodiment is used for heat control of an electronic device in which a plurality of, for example, three, device housings 30 are stacked and arranged.
1 is formed in a box shape, for example. In the unit housing 31, a plurality of connection ports 311 and a plurality of fan mounting portions 312 are formed on the peripheral wall at predetermined intervals.

The plurality of connection ports 311 and the plurality of fan mounting portions 312 are arranged so that a metal plate 313 can be detached therefrom, and the number of the metal plates 313 of the connection port 311 is equal to the number of objects to be connected (in FIG. ), And one end is connected to each of the duct members 32. In addition, the fan mounting portions 312 of the unit housing 31 are selectively detached from at least one (four in FIG. 6) blind plates 313 at least one of which the duct members 32 are mounted, so that the cooling fans 33 are respectively provided. Mounted.

On the other hand, the duct member 32 is
It is connected to one of the ventilation holes 301 provided in each of the device housings 30 (see FIG. 7). Each of the three device housings 30 accommodates and arranges an electronic circuit unit (not shown), and the air vents 301 are juxtaposed and stacked. The ventilation port 301 of the device housing 30 is similarly formed in a screw structure as shown in FIG. 7, and the other end of the duct member is screwed and connected using the screw structure.

Here, the unit housing 31 has a redundant configuration of the heat control system of the three equipment housings 30 with its cooling fan 33, and cooperates in a normal state to cooperate with the ventilation openings 301 of the equipment housings 30. The internal air is taken in from and exhausted to the outside.

In the above description, the three device housings 30
In the case where the thermal control system of four device housings 30 is configured, for example, four duct members 32 are connected by piping, and at least five cooling fans 33 are connected. By attaching and arranging, the heat control system can be configured redundantly. Even in a case where an electronic device is configured using two device housings 30, heat control is performed by connecting two duct members 32 in a substantially similar manner and mounting and arranging at least three cooling fans 33. It is possible to make the system redundant.

With the above configuration, when the electronic circuit unit (not shown) of the device housing 30 is driven, four cooling fans 33 are driven in conjunction therewith, and the cooling fan 33 is driven to drive the cooling fan 33. The internal air is taken in from the ventilation port 301 of each device housing 30 through the duct member 32 and exhausted to the outside of the unit housing 31. Thereby, the device housing 3
The amount of heat of the electronic circuit unit (not shown) in the unit 0 is exhausted to the outside from the ventilation port 301 and the duct member 32 through the unit housing 31 to perform heat control of the electronic circuit unit (not shown). It is.

The cooling fan 3 of the unit housing 31
If one of the three failed, the other three perform drive control and perform a heat exhaust operation, and maintenance and inspection including replacement of the failed cooling fan 33 is performed. Thus, the heat control system constituted by the unit housing 31 continuously controls the heat of the electronic circuit unit (not shown) even during the maintenance and inspection.

As described above, the fan unit comprises three device housings 30 each having the ventilation port 301 provided on the wall surface on which the electronic circuit unit (not shown) is accommodated, and the ventilation unit 301 and the unit housing. Any one of the plurality of connection ports 311 of the body 31 communicates with the duct member 32, and the duct member 3
The cooling fans 33 are selectively assembled and arranged by at least one number greater than two.

According to this, the unit housing 31 provided with at least one more cooling fan 33 than the number of the three device housings 30 and the ventilation port 301 of the three device housings 30 are ducted. With a simple operation of simply connecting with the member 32, highly reliable thermal control of an electronic device including the three device housings 30 can be realized.

Further, according to this, it is possible to configure a redundant system corresponding to the number of arrangements of the equipment housings 30 using the same unit housings 31, thereby coping with diversification of usage forms. It becomes possible.

(Fourth Embodiment) Hereinafter, a fan unit according to a fourth embodiment will be described with reference to FIG. That is, the fan unit according to the fourth embodiment is used for heat control of an electronic device in which a plurality of, for example, three device housings 40 are arranged in a stack, and the unit housing has a separable box shape. First to third unit housings 41, 4
2, 43. Among them, the first unit housing 4
1, one connection port 411 is provided on the peripheral wall corresponding to the ventilation port 401 of the lower device housing 40, and, for example, two cooling fans 4 are provided on the peripheral wall corresponding to the connection port 411.
4 are assembled at a predetermined interval. A connection port 412 is provided on a predetermined surface (one surface in the device housing stacking direction) of the peripheral wall of the first unit housing 41.

On the other hand, a connection port 421 is formed on the peripheral wall of the second unit casing 42 so as to correspond to the ventilation port 401 of the middle device casing 40, and a cooling port is formed on the peripheral wall corresponding to the connection port 421. The fan 44 is assembled. In the second unit housing 42, a pair of connection ports 422 and 423 are formed on both walls of the peripheral wall in the stacking direction, and one of the connection ports 422 is formed in the first unit housing 41. It is connected to the connection port 412.

In the third unit casing 43, a connection port 431 is formed on the peripheral wall of the third unit casing 43 so as to correspond to the ventilation port 401 of the upper equipment casing 40, and a cooling port is formed on the peripheral wall corresponding to the connection port 431. The fan 44 is assembled. In the third unit casing 43, a connection port 432 is formed on the peripheral wall in the stacking direction of the peripheral wall so as to correspond to the other connection port 423 of the second unit casing 42. 432
Is connected to the other connection port 423 of the second unit housing 42.

The third unit casing 43 may be formed by closing the connecting port 423 of the pair of connecting ports 422, 423 of the second unit casing 42 with a blind plate.

In the above configuration, when the thermal control system is configured, the connection ports 411 of the first unit housing 41 are first connected to the ventilation ports of the lower equipment housing 40 in a state where the equipment housings 40 are stacked. Connect to 401. Then, the connection ports 421 and 431 of the second and third unit casings 42 and 43 are connected to the ventilation ports 401 of the middle and upper equipment casings 40. At this time, the first to third unit housings 41,
42 and 43 are connection ports 412 and 422 and 423 and 4
32 and are assembled together.

Here, the first to third unit housings 4
A total of four cooling fans 4 assembled in 1, 42 and 43
4, when the electronic circuit unit (not shown) of the device housing 40 is driven, four units are driven in conjunction therewith,
By the drive, the first to third unit housings 41, 4
2, 43, the internal air is taken in from the ventilation opening 401 of each device housing 40 and exhausted to the outside of the unit. As a result, the amount of heat of the electronic circuit unit (not shown) in the device housing 40 is increased by the ventilation opening 401, the first to third unit housings 41,
The air is exhausted to the outside through 42 and 43, and heat control of the electronic circuit unit (not shown) is performed.

Then, the first to third unit housings 4
When one of the cooling fans 44 of any one of the cooling fans 44, 42, 43 fails, the other three fans are driven and controlled to perform the heat removal operation. Maintenance inspection including replacement is performed. Thus, the thermal control system including the first to third unit housings 41, 42, and 43 continuously controls the heat of the electronic circuit unit (not shown) even during the maintenance and inspection. It is.

In the above description, the three device housings 40
Although the description has been given of the case where the thermal control system is configured as described above, it is possible to configure the thermal control system of two or more device housings 40, for example. In the case of the thermal control system of the two device housings 40, the first unit housing 41 and the third unit housing 43 are configured, and the thermal control system of four or more device housings 40 is configured. If so, the first to third unit housings 41, 42, 43
In addition, it can be easily realized by increasing the number of the second unit housings 42.

As described above, the above-mentioned electronic devices have the first to third unit housings 41 and 4 in which the cooling fan 44 is attached to one of the ventilation openings 401 of the three device housings 40.
2, 43 connection ports 411, 421, 431 are attached, and the first to third unit housings 41, 42,
43, the heat control system of the three device housings 40 was configured. At least one more cooling fan 4
4 provided a thermal control system.

According to this, the redundant configuration of the heat control system according to the arrangement configuration of the three device housings is realized with high accuracy by a simple configuration having at least one more cooling fan 44. can do. In addition, according to this, it is possible to easily construct an optimal redundant system according to the number of arrangements of the device housings 40, thereby diversifying the usage form.

Therefore, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0062]

As described above in detail, according to the present invention, it is possible to provide an electronic apparatus capable of realizing highly reliable and accurate thermal control and diversifying the usage form. Can be.

Further, according to the present invention, it is possible to provide a fan unit capable of realizing highly reliable and accurate heat control while reducing the number of cooling fans.

Further, the present invention can realize highly reliable and highly accurate heat control while reducing the number of cooling fans.
In addition, it is possible to provide a fan unit capable of diversifying a usage form.

[Brief description of the drawings]

FIG. 1 is an exemplary perspective view shown for explaining an electronic apparatus according to a first embodiment of the present invention;

FIG. 2 is a sectional view showing a main part of FIG.

FIG. 3 is a block diagram showing a cooling control system of FIG. 1;

FIG. 4 is an exemplary perspective view shown for explaining an electronic apparatus according to a second embodiment of the present invention;

FIG. 5 is a cross-sectional view showing a predetermined portion in an assembled state of FIG.

FIG. 6 is a side view for explaining a fan unit according to a third embodiment of the present invention.

FIG. 7 is an exploded perspective view showing a connection portion between the device housing and the duct member in FIG. 6;

FIG. 8 is an exploded perspective view for explaining a fan unit according to a fourth embodiment of the present invention.

[Explanation of symbols]

 10 ... equipment housing. 11 ... cooling fan. 111 ... Changeover switch. 12 Cooling fan. 121 ... changeover switch. 13 ... Filter. 14 ... Filter. 15 Control part. 19 ... Electronic circuit unit. 20 ... equipment housing. 201 ... Ventilation opening. 21 Unit housing. 211 ... Fan mounting part. 22 ... cooling fan. 25 ... screws. 30 ... equipment housing. 301 ... Ventilation opening. 31 Unit housing. 311 ... connection port. 312… Fan attachment part. 313 ... Mekura board. 32 ... duct member. 33 ... Cooling fan. 40 ... equipment housing. 401 ... ventilation hole. 41: First unit housing. 411: Connection port. 412: Connection port. 42... Second unit housing. 421 ... connection port. 422,423 ... Connection port. 43 ... third unit housing. 431 Connection port. 432… Connection port. 44 Cooling fan.

Claims (6)

[Claims] An apparatus housing accommodating an electronic circuit unit, first and second cooling fans provided on different wall surfaces of the apparatus housing, and at least one of the first and second cooling fans. An electronic device, comprising: fan control means for selectively driving to take in outside air into the device housing and exhaust air from the other to the outside of the device housing. 2. The apparatus according to claim 1, wherein the first and second cooling fans are provided on opposed wall surfaces of an equipment housing.
Electronic device as described. 3. The electronic device according to claim 1, wherein an external switch for switching operation is provided in each of the first and second cooling fans. 4. An electronic circuit unit is housed therein.
A plurality of device housings, which are attached to a plurality of device housings each having a ventilation hole on a wall surface, are disposed between the device housings so as to cover the ventilation holes of the plurality of device housings, and A fan unit comprising a unit housing in which at least one cooling fan is provided at least one more than the number of bodies. 5. An electronic circuit unit is housed therein.
A unit housing to be mounted on a plurality of device housings provided with ventilation holes on a wall surface, the unit housing being provided with a plurality of connection ports and a plurality of fan mounting ports formed selectively releasably; A duct member that communicates any of the plurality of ventilation ports of the device housing with any of the plurality of connection ports of the unit housing, and at least the number of the device housings among the plurality of fan attachment portions of the unit housing. A fan unit, comprising: a plurality of cooling fans selectively mounted only on one more number. 6. An electronic circuit unit is housed therein.
It is attached to two or more device housings provided with ventilation holes on the wall surface, and has a connection port attached to one of the two or more device housings, A first unit housing in which a plurality of cooling fans are provided; and a first unit housing communicatively attached to the first unit housing, wherein the first unit housing includes another cooling fan. 1
A fan unit comprising: one or more second unit housings each having a connection port attached to a ventilation opening of two device housings and provided with at least one cooling fan.