JP7159591B2 - ELECTRONIC DEVICE, ELECTRONIC DEVICE MAINTENANCE METHOD, ELECTRONIC DEVICE CONTROL METHOD, AND PROGRAM - Google Patents

Description

The present invention relates to an electronic device, an electronic device maintenance method, an electronic device control method, and a program.

In recent years, in the field of HPC (High Performance Computing), there has been a remarkable demand for improved computational performance, and there is a tendency to store more densely together, increase total computational performance, and solve (analyze) problems with scientific calculations. is prominent. As a result, storage RACKs in HPC products are becoming more power consuming.

Therefore, an attempt has been made to introduce cooling technology by using a RACS (Rack Air Containment System) to have an LCP (air conditioner) in each RACK unit.
However, since there is a limit to the amount of air blown in this system, in the case of HPC products, it is considered not only to increase the amount of air blown, but also to lower the temperature of the supplied cool air below the temperature of the machine room. It can be inferred that the temperature of the blast will change to a lower one in the future.

However, at that time, it cannot be said that the RACS is designed with sufficient consideration given to the method of lowering the electrical efficiency (PUE=Power Usage Effectiveness) in the RACK and the method of maintenance.
In particular, the mean time to recovery (MTTR) required for maintenance work by maintenance personnel increases, which lowers the operating rate.

Japanese Patent Laid-Open No. 2002-200002 discloses a technique of creating a state isolated from a machine room by RACS and then reducing the air volume required for operation in proportion to the electric power during operation.

JP 2017-54216 A

However, before starting maintenance, it is necessary to wait for a certain period of time until the air from the exhaust port naturally flows back through the computer equipment so that the temperature of the computer equipment that is stopped is close to the outside temperature, and the air is evenly blended. However, there was a problem that it was difficult to start maintenance quickly.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an electronic device or the like that solves the above problems.

The present invention has been made to solve the above problems,
In order to achieve the above object, the present invention includes a cooling section for cooling air and a rack device for housing an information processing device, wherein the rack device is positioned between the cooling section and an air intake of the information processing device. and an air intake duct portion that supplies air from the cooling unit to the information processing device; a first ventilation part provided in the intake duct part, and a second ventilation part provided in the exhaust duct part, so that the exhaust from the information processing device is supplied to the In the electronic device, air can be blown from the exhaust duct section to the intake duct section via the second ventilation section and the first ventilation section.

Further, the present invention provides a cooling unit for cooling air, a rack device for housing an information processing device, an intake duct unit mounted between the cooling unit and an intake port of the information processing device, the cooling unit and the and an exhaust duct mounted between exhaust ports of an information processing device, wherein a second ventilation section is provided in the exhaust duct for exhaust from the information processing device. and a maintenance method for an electronic device in which air is blown into the air intake duct through a first ventilation section provided in the air intake duct.

Further, the present invention provides a cooling unit for cooling air, a rack device for housing an information processing device, an intake duct unit mounted between the cooling unit and an intake port of the information processing device, the cooling unit and the A control method for an electronic device comprising an exhaust duct mounted between exhaust ports of an information processing device and a control unit, wherein the first ventilation unit provided in the intake duct and the exhaust duct provided in the exhaust duct The control method of the electronic device controls the controller so that the exhaust air from the information processing device is blown into the air intake duct by opening the second ventilation portion.

Further, the present invention provides a cooling unit for cooling air, a rack device for housing an information processing device, an intake duct unit mounted between the cooling unit and an intake port of the information processing device, the cooling unit and the An exhaust duct installed between exhaust ports of an information processing device and a computer of an electronic device having a control unit are provided in a first ventilation unit provided in the intake duct and a second ventilation duct provided in the exhaust duct. The program functions as control means for controlling the exhaust air from the information processing device to be blown into the air intake duct by opening the ventilation part of the air intake duct.

According to the present invention, the exhaust air from the information processing device is sent to the air intake duct via the second ventilation section provided in the exhaust duct section and the first ventilation section provided in the air intake duct section. The effect is obtained that the temperature difference between the device and the outside air can be reduced in a short period of time.

It is a figure showing the composition of a 1st embodiment of the present invention. It is a figure showing the composition of a 1st embodiment of the present invention. It is a figure which shows the structure of the 2nd Embodiment of this invention. It is a figure which shows the structure of the cooling part of the 2nd Embodiment of this invention. It is a figure which shows the structure of the ventilation guard mechanism of the 2nd Embodiment of this invention. It is a figure which shows the structure of the 2nd Embodiment of this invention. It is a figure which shows the structure of the 2nd Embodiment of this invention. FIG. 6 is a diagram showing the configuration of an intake air cover according to a second embodiment of the present invention; FIG. 10 is a diagram showing the configuration of an air cover lock display mechanism according to a second embodiment of the present invention; It is a figure which shows the structure of the 2nd Embodiment of this invention. FIG. 7 is a diagram showing the configuration of an intake air cover and an exhaust air cover according to a second embodiment of the present invention; It is a figure which shows a part of structure of the 2nd Embodiment of this invention. It is a figure which shows a part of structure of the 2nd Embodiment of this invention. It is a figure which shows the flow of the maintenance method of the 2nd Embodiment of this invention. It is a figure which shows the structure of the 2nd Embodiment of this invention. It is a figure which shows the structure of the 2nd Embodiment of this invention. It is a figure which shows the structure of the 2nd Embodiment of this invention. It is a figure which shows the structure of the 2nd Embodiment of this invention. It is a figure which shows the subject which the conventional technique had. It is a figure which shows the subject which the conventional technique had.

[First embodiment]
An electronic device according to a first embodiment of the present invention will now be described with reference to FIG.
This embodiment is an embodiment having the minimum configuration of the communication device of the present invention, and the electronic device 1 is configured to include a cooling unit 2, an information processing device 3, an intake duct unit 4, and an exhaust duct unit 5. It has become.

The intake duct section 4 is installed between the cooling section 2 and an intake port (not shown) of the information processing device 3 , and is configured to supply air from the cooling section 2 to the information processing device 3 .
Further, the intake duct portion 4 is provided with a ventilation portion 4a.

The exhaust duct unit 5 is installed between the cooling unit 2 and an exhaust port (not shown) of the information processing device 3 and configured to supply the exhaust air from the information processing device 3 to the cooling unit 2 .
Further, the exhaust duct portion 5 is provided with a ventilation portion 5a.

Next, a maintenance method for the electronic device 1 of this embodiment will be described.
In the present embodiment, when the information processing apparatus 3 is stopped due to maintenance or the like, the ventilation portion 4a of the intake duct portion 4 and the ventilation portion 5a of the exhaust duct portion 5 are opened.
As a result, the exhaust air from the information processing device 3 is sent to the intake duct section 4 via the ventilation section 5a provided in the exhaust duct section 5 and the ventilation section 4a provided in the intake duct section 4 (see the arrow in FIG. 1). ).

As described above, according to the electronic device 1 of the present embodiment, when the information processing device 2 is stopped for maintenance or the like, the exhaust air from the information processing device 2 can Air is blown to the intake duct portion 4 via the portion 5 a and the ventilation portion 4 a provided in the intake duct portion 4 . As a result, it is possible to reduce the temperature difference between the information processing device 2 and the outside air in a short period of time.

More specifically, first, as shown in FIG. 19, when the front door (front door) of the RACK is opened, the temperature and humidity in the machine room flow into the RACK and enter the computer equipment (information processing device). There was a problem that dew condensation occurred.

Also, as shown in FIG. 20, when the rear door of the RACK is opened and the computer equipment to be maintained is taken out during maintenance, the computer equipment is cooled, so condensation on the computer equipment may occur. There was also the problem that

Therefore, when starting maintenance, it is necessary to wait for a certain period of time until the air from the exhaust port naturally flows back through the computer equipment and is evenly blended so that the temperature of the computer equipment that has stopped is close to the outside temperature. was there.

For example, in the case of the electronic device 11 that does not have the ventilation units 4a and 5a as shown in FIG. It was introduced into the cooling section 12 via the section 15 and circulated to the information processing device 13 via the intake duct section 14 . Therefore, the amount of heat retained by the exhaust gas of the information processing device 13 is lost by being cooled by the cooling unit 12 and cannot be used to sufficiently heat the information processing device 13 .

On the other hand, according to the electronic device 1 of the present embodiment, as shown in FIG. It can be used to heat the information processing device 3 without losing the amount of heat retained by the exhaust gas.
As a result, it is possible to reduce the temperature difference between the information processing device 2 and the outside air in a short period of time.

[Second embodiment]
<Electronic Device>
Next, an electronic device 21 according to a second embodiment of the invention will be described with reference to the drawings.
The electronic device 21 of this embodiment uses RACS to cool the computer equipment (information processing device) 22 in RACK units. As shown in FIG. , an exhaust air cover (exhaust duct portion) 25, an intake air cover (intake duct portion) 26, upper and lower air guard panels 27, side air guard panels 28, computer equipment 22 to be cooled, and cooling The configuration includes a fan group 29 of a unit 32 (see FIG. 4), a control circuit 30, and RACS control management means (software) 31 on an external management PC.
The cooling unit 32 (see FIG. 4) is preferably water-cooled, and the RACS control circuit 30 and the RACS control management means 31 may be connected by an appropriate network such as an Ethernet network (registered trademark).

As shown in FIG. 4, the air blow guard mechanism 24 is installed on the side surface of the cooling section 32, for example, in units of 1U (Unit, about 44.5 mm) on the intake side and the exhaust side. For example, if the cooling unit 32 has a height of 42U, a maximum of 42×2=84 sending guard mechanisms 24 are installed.

5(a) and 5(b), the air blow guard mechanism 24 includes a movable guard plate 41, an air cover fixing insertion port 42, and a control board 43 for controlling the opening and closing of the movable guard plate 41. , a drive unit (motor) 44 and a moving member 45 .
The movable guard plate 41 is configured to block the air in the cooling section 32 when facing in the vertical direction (vertical direction), and allow air blowing when the direction is changed in the lateral direction (horizontal direction).

Further, the drive unit 44 is connected to the moving member 45 so that the moving member 45 can move in the longitudinal direction (vertical direction). When the moving member 45 moves up and down, the locking members 45a and 45b of the moving member 45 come into contact with the movable guard plate 41, thereby controlling the opening and closing of the movable guard plate 41. .
Of course, the sending guard mechanism 24 may have any configuration as long as it can block the air in the cooling section 32 or allow air blowing.

FIG. 6 illustrates a RACK 50 that mounts (accommodates) the cooling unit 32 and the computer equipment 22 to be cooled. Although the cooling unit 32 and the rack 50 are shown separately for ease of illustration, they are actually connected so that the air blow guard mechanism 24, the intake air cover 26, and the exhaust air cover 25 are in close contact with each other. It consists of

The intake air cover 26 and the exhaust air cover 25 are attached by inserting them into the frame 50a of the rack 50 on which the computer equipment 22 is mounted and the air cover fixing insertion opening 42 of the sending guard mechanism 24, respectively.

A gap is generated between the exhaust air cover 25 and the computer equipment 22 due to the size (depth) of the computer equipment 22 . Therefore, in order to divide this gap into individual computer equipment 22, as shown in FIG. is preferably installed.

The intake air cover 26 is composed of a plurality of parts, as shown in FIG. there is Also, as shown in FIG. 9, an air cover lock display mechanism 75 may be provided.

In addition, FIG. 8 shows an example of the intake air cover 26 composed of 2U. The side air covers 72-1 and 72-2 are connected by a joint 73, and the upper and lower sides are connected to the upper air cover 71. , and is surrounded by a lower air cover 74 . By connecting the necessary U number of side air covers 72 with the joints 73 in this manner, the intake air cover 26 suitable for the height (U number) of the computer equipment 22 can be configured.

In addition, when a plurality of computer devices 22 are vertically arranged in the intake air cover 26, providing the lower air cover 74 for the upper computer device 22 and the upper air cover 71 for the lower computer device 22 are functionally equivalent to each other. redundant as Since the intake air cover 26 has a function of partitioning the air volume, air pressure, humidity, and temperature of each computer device 22, two intake air covers 26 in contact with each other are useless.

Therefore, for example, it is preferable to remove the upper air cover 71 of the lower computer equipment 22 and to closely attach the lower air cover 74 of the computer equipment 22 installed thereon and share it.
At this time, it is conceivable that the material of the intake air cover 26 itself is made of elastic material, or that the lower part of the lower air cover 74 is processed so as to be crimped with a material such as a flame-retardant rubber material. be done.

The intake air cover 26 has an attachment portion 76 attached to the frame 50 a of the rack 50 and an insertion portion 77 inserted into the air cover fixing insertion opening 42 of the air blow guard mechanism 24 . The insertion portion 77 has a notch 78 so that the intake air cover 26 can be locked inside the air cover fixing insertion port 42 .

Although FIG. 8 shows the intake air cover 26, the exhaust air cover 25 has a structure in which the intake air cover 26 is turned upside down, and is composed of the same parts.

As shown in FIGS. 9A to 9C, the air cover lock display mechanism 75 is provided on the intake air cover 26 (or the exhaust air cover 25) and has an LED 79 and a release button 80. is preferred.
Specifically, the air cover lock display mechanism 75 has a shape that sandwiches the intake air cover 26 (or the exhaust air cover 25), and has a temperature sensor 81 that measures the temperature inside the intake air cover 26 inside. An LED 79 indicating the locked state and a release button 80 for requesting forced release of the lock are provided on the outside, and a connector 82 for transmitting these controls to the air blow guard mechanism 24 is provided.

The connector 82 is connected to the control board 43 that controls opening and closing of the movable guard plate 41 inside the air blow guard mechanism 24 . 9(d) and (e), the locking/unlocking of removal of the intake air cover 26 is controlled by the lock control drive unit 83 attached to the control board 43. FIG.
In this embodiment, one air cover lock display mechanism 75 is preferably provided for each of the intake air cover 26 and the exhaust air cover 25 . For example, even if the intake air cover 26 is made up of 2U, it is preferable to attach it only to the side air cover 72-1 as shown in FIG.

In the electronic device 21, as shown in FIG. 10, an exhaust air cover 25 and an intake air cover 26 are provided with ventilation portions 25a and 26a, respectively. As shown in FIG. 11(b), the ventilation sections 25a and 26a preferably have a movable guard plate 91 similar to the ventilation guard mechanism 24 and a control board (not shown) for controlling opening and closing. .
Note that FIG. 11A shows an electronic device that does not have ventilation portions 25a and 26a.

The internal bypass ventilation mechanism 23 is a mechanism composed of these two ventilation portions 25a and 26a, and has the function of forming an internal bypass ventilation passage A that can directly connect the ventilation portions 25a and 26a to allow air to flow. have.

In response to a switching instruction, the air blow guard mechanism 24 and the internal bypass air ventilation mechanism 23 close the movable guard plate 42 of the air blow guard mechanism 24 and at the same time gradually open the ventilation portions 25a and 26a to reduce the total flow rate. is controlled by each control board so as to carry out air blowing without changing .

<How to maintain the electronic device>
Next, a maintenance method for the electronic device 21 of this embodiment will be described.
In the following, there are two scenes: a scene in which the computer device 22 is installed in the RACK and it is operated for the first time, and a scene in which the computer is turned off (DC-OFF) due to a failure in the computer during maintenance and replaced. will be explained separately.

(first movable)
First, in the present embodiment, as shown in FIG. 12, it is assumed that a plurality of types of computer equipment 22 are installed in the RACK 50 . Here, the operation is shown in an example in which the 2U computer devices 22-8 to 22-14 are mounted so as to sandwich the 1U computer devices 22-4 to 22-7.

First, the RACK control management means 31 constantly monitors the internal state of the RACS 50 . The monitoring items are the air blow guard state (Open/Close) of the air blow guard mechanism 24, the mounting state of the exhaust air cover 25 and the intake air cover 26, the locked state, the temperature value of the temperature sensor 81 in the intake air cover 26, the machine The temperature values of the room temperature sensors are included and monitored using a table such as that shown in FIG.

Then, as shown in FIG. 12, the computer devices 22-4 to 22-14 are mounted on the RACK 50, and the exhaust air cover 25 and the intake air cover 26 that match the height (U number) of the computer device 22 are installed. It is inserted into the frame 50a of the rack 50 and the air cover fixing insertion port 42 of the air blow guard mechanism 24 and attached.

At this time, as shown in the flow of FIG. 14, the air blow guard mechanism 24 notifies the RACK control management means 31 of the state change notification, and in the table shown in FIG. go.

Next, the computer equipment 22 is put into operation.
Specifically, it instructs the RACK control management means 31 to turn on the computer equipment 22 (DC-ON).

Then, as shown in the flow of FIG. 14, the RACK control management means 31 selects the specific RACK 50 based on the table of FIG. Detect upper wearing range.
Since the computer equipment 22 may not be 1U, even if there is only one target computer equipment 22, it is possible that a plurality of instructions will be issued. For example, when an instruction to turn on the computer device 22-14 is given, in FIG. 13, the number corresponding to the computer device 22-14 (indicated as computer device 14 in FIG. 13) is No. Since it is 41 and 40, a plurality of instructions will be issued.

Next, the RACK control management means 31 confirms whether the exhaust air covers 25 and the intake air covers 26 in the mounting range (for example, Nos. 41 and 40) on the RACK 50 have been mounted, based on information collected as needed. do. If it is not installed, an error is returned and the power is not turned on.

If there is no error, the target computer device 22-14 is activated by a remote power ON instruction of WOL or a power ON instruction of IPMI via the Ethernet network.
Then, the air blow guard mechanism 24 is instructed to be in a state of blowing air, and further instructed to lock the exhaust air cover 25 and the intake air cover 26 so that they cannot be removed.

Then, under the control of the air blow guard mechanism 24, an operation notification is transmitted through the connector 82, and the air cover lock display mechanism 75 turns the LED display green to indicate that it is in operation. At this time, the ventilation portions 25a and 26a of the internal bypass mechanism 23 connecting the exhaust air cover 25 and the intake air cover 26 are both closed.

Also, the RACK control management means 31 recalculates the power consumption based on the table of FIG. 32 fan group 29 is instructed.

Here, state transition of the air cover lock display mechanism 75 will be described with reference to FIG. 15 .
When the display of the LED 79 is green, it indicates that the intake air cover 26 and the exhaust air cover 25 are locked and the guard mechanism is open and not locked.
It is detected that the power supply has been turned off from this state, and the temperature difference between the temperature value measured by the temperature sensor 81 in the intake air cover 26 and the temperature value measured by the temperature sensor in the machine room exceeds the threshold. In that case, the display of the LED 79 is made red.

When the display of the LED 79 is red, it indicates that the intake air cover 26 and the exhaust air cover 25 are locked and the guard mechanism is closed and locked. Moreover, the difference between the temperature value measured by the temperature sensor 81 in the intake air cover 26 and the temperature value measured by the temperature sensor in the machine room is greater than or equal to the threshold, indicating a temperature imbalance.
From this state, when the temperature difference between the intake air cover 26 and the machine room falls within the threshold value, the display of the LED 79 is extinguished.

When the display of the LED 79 is off, the intake air cover 26 and the exhaust air cover 25 are in an unlocked state, recognized as an initial state, and the guard mechanism is in a closed state.

(maintenance replacement)
Next, the scene of maintenance replacement will be described.
First, the RACK control management means 31 monitors and detects whether a request to turn off the power of the failed computer device 22 has been specified or whether the computer device has stopped due to a failure.

For example, if there is a request to power off the failed computing device 22, the table in FIG. 13 changes state to DC-OFF Request state.
Also, the RACK control management means 31 calculates the range of positions in the RACK 50 of the target computer equipment 22 by referring to the table of FIG. 13 from the name of the computer equipment 22 .

Next, the RACK control management means 31 instructs the corresponding air blow guard mechanism 24 .
Then, the air blow guard mechanism 24 closes the movable guard plate 41 to cut off air blow from the cooling section 32 to the intake air cover 26 (see FIGS. 16 and 18A).

At the same time, the RACK control management means 31 instructs the exhaust air cover 25 and the intake air cover 26 to open the movable guard plates 91 of the ventilation portions 25a and 26a. The opening and closing of the movable guard plates 91 of the ventilation portions 25a and 26a are performed over a certain period of time, and the exhaust gas is rapidly circulated through the internal bypass ventilation passage A while avoiding sudden temperature changes. This operation circulates air with exhaust heat to the intake side, and as the intake and exhaust temperatures approach each other, the temperature rises and approaches the outside air temperature.

When the temperature value of the temperature sensor 81 in the intake air cover 26 and the temperature value of the machine room (outside air temperature) exceeds a preset threshold value, the display of the LED 79 is turned red and the intake air It is controlled so that the locked state of the air cover 26 and the exhaust air cover 25 is maintained.
When this temperature difference reaches a preset threshold value for turning off the power, the power is turned off to turn off the target computer device 22 (see FIG. 18(b)).

After the power is turned off, if the temperature difference becomes equal to or less than the preset temperature difference threshold value, the RACK control management means 31 instructs to move the movable guard plate 91 of the ventilation portions 25a and 26a of the internal bypass mechanism 23. close up.
Then, the RACK control management means 31 instructs the LED 79 to turn off, and instructs the ventilation guard mechanisms 24 of the exhaust air cover 25 and the intake air cover 26 in the corresponding range to release the locked state.

If for some reason the difference does not fall below the threshold value, or if maintenance must be performed in a situation in which the power to the faulty computer equipment 22 cannot be turned off, the release button 80 of the air cover lock display mechanism 75 is pressed. Press to request unlocking of the intake air cover 26 and the exhaust air cover 25 of the target computer equipment 22 .

When the release button 80 of either the exhaust air cover 25 or the intake air cover 26 is pressed, the air blow guard mechanism 24 notifies this, and the RACK control management means 31 releases the exhaust air cover 25 in the corresponding range. Also, an instruction to unlock the air blow guard mechanism 25 of the intake air cover 26 is issued.

Then, the unlocked intake air cover 25 and exhaust air cover 26 are removed, maintenance and replacement are performed, and the computer equipment 22 is repaired (see FIGS. 17 and 18(c)).
Even when the computer equipment 22 is pulled out, the other equipment continues to operate, and the intake air cover 26 and the exhaust air cover 25 of the computer equipment 22 in operation are locked.
Further, when the intake air cover 26 and the exhaust air cover 25 of the computer equipment 22 to be replaced for maintenance are removed, the ventilation guard mechanism 24 is notified of the removal at any time.

After the maintenance/replacement, the computer equipment 22 is installed and the intake air cover 26 and the exhaust air cover 25 are installed in the same manner as in the above-described initial movement. Go and restart.

In this embodiment, as shown in FIG. 18(c), when performing maintenance or replacement of the computer equipment 22 that has failed, etc., the temperature value of the temperature sensor 81 inside the intake air cover 26 and the temperature value of the machine room (outside air temperature) ) becomes equal to or less than the threshold value, the target computer device 22 is taken out.
As a result, the temperature difference from the outside air temperature is reduced, so that condensation on the computer equipment 22 can be prevented.

Further, since the exhaust air from the computer equipment 22 is made to flow into the computer equipment 22 via the internal bypass ventilation path A formed by the internal bypass mechanism 23 composed of the ventilation portions 25a and 26a, the heating is accelerated. , the temperature difference between the computer equipment 22 and the outside air can be reduced in a short period of time.

Although the present invention has been described above based on the embodiments, it is needless to say that the present invention is not limited to the above embodiments and can be variously modified without departing from the scope of the invention.
For example, a program for realizing the functions of the RACK control management means of the above embodiment is recorded in a computer-readable recording medium, and the program recorded in this recording medium is read and executed by a computer system. Equipment maintenance methods may be performed. It should be noted that the "computer system" referred to here includes hardware such as an OS and peripheral devices. Also, the "computer system" includes a WWW system provided with a home page providing environment (or display environment). The term "computer-readable recording medium" refers to portable media such as flexible discs, magneto-optical discs, ROMs and CD-ROMs, and storage devices such as hard discs incorporated in computer systems. In addition, "computer-readable recording medium" means a volatile memory (RAM) inside a computer system that acts as a server or client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. , includes those that hold the program for a certain period of time.

Further, the above program may be transmitted from a computer system storing this program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in a transmission medium. Here, the "transmission medium" for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. Also, the program may be for realizing part of the functions described above. Further, it may be a so-called difference file (difference program) that can realize the functions described above in combination with a program already recorded in the computer system.

DESCRIPTION OF SYMBOLS 1, 21... Electronic device, 2, 32... Cooling part, 3... Information processing apparatus, 4... Air intake duct part, 4a, 5a, 25a, 26a... Ventilation part, 5... Exhaust duct portion 22 Computer equipment 23 Internal bypass ventilation mechanism 24 Forwarding guard mechanism 25 Exhaust air cover 26 Intake air cover 31 - RACS control management means

Claims (4)

Equipped with a cooling unit for cooling air and a rack device for housing the information processing device,
The rack device
an air intake duct unit mounted between the cooling unit and an air intake port of the information processing device and supplying air from the cooling unit to the information processing device;
an exhaust duct unit mounted between the cooling unit and an exhaust port of the information processing device for supplying exhaust air from the information processing device to the cooling unit;
A first ventilation part is provided in the intake duct part, and a second ventilation part is provided in the exhaust duct part,
The cooling unit includes an opening control mechanism that is provided in an opening of a portion where the air intake duct unit and the exhaust duct unit are attached and that opens and closes the opening,
An electronic device in which exhaust air from the information processing device can be blown from the exhaust duct section to the intake duct section via the second ventilation section and the first ventilation section. A cooling unit for cooling air, a rack device for housing an information processing device, an air intake duct installed between the cooling unit and an air intake port of the information processing device, and an air exhaust for the cooling unit and the information processing device. an exhaust duct portion mounted between the mouths , wherein the cooling portion is provided in an opening of a portion where the intake duct portion and the exhaust duct portion are mounted, and an opening control mechanism for freely opening and closing the opening. A maintenance method for an electronic device comprising :
Closing the opening of the cooling unit to cut off the supply to the air intake duct,
A maintenance method for an electronic device, wherein exhaust air from the information processing device is sent to the intake duct section through a second ventilation section provided in the exhaust duct section and a first ventilation section provided in the intake duct section . . A cooling unit for cooling air, a rack device for housing an information processing device, an air intake duct installed between the cooling unit and an air intake port of the information processing device, and an air exhaust for the cooling unit and the information processing device. A control method for an electronic device comprising an exhaust duct portion mounted between mouths and a control portion,
By opening a first ventilation portion provided in the air intake duct portion and a second ventilation portion provided in the exhaust duct portion, control is performed such that exhaust air from the information processing device is blown to the air intake duct portion . A control method for an electronic device that controls a part. A cooling unit for cooling air, a rack device for housing an information processing device, an air intake duct installed between the cooling unit and an air intake port of the information processing device, and an air exhaust for the cooling unit and the information processing device. An exhaust duct part installed between the mouths and a computer of an electronic device equipped with a control part,
By opening a first ventilation portion provided in the air intake duct portion and a second ventilation portion provided in the exhaust duct portion, control is performed such that exhaust air from the information processing device is blown to the air intake duct portion . A program that functions as a control means for

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