JP2003166729A - Air-conditioning system of communication unit and information processor room - Google Patents

Air-conditioning system of communication unit and information processor room

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Publication number
JP2003166729A
JP2003166729A JP2001367430A JP2001367430A JP2003166729A JP 2003166729 A JP2003166729 A JP 2003166729A JP 2001367430 A JP2001367430 A JP 2001367430A JP 2001367430 A JP2001367430 A JP 2001367430A JP 2003166729 A JP2003166729 A JP 2003166729A
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JP
Japan
Prior art keywords
rack
air
communication
information processing
processing equipment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2001367430A
Other languages
Japanese (ja)
Other versions
JP3842631B2 (en
Inventor
Masanori Inoue
Atsushi Takahashi
正憲 井上
惇 高橋
Original Assignee
Takasago Thermal Eng Co Ltd
高砂熱学工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Takasago Thermal Eng Co Ltd, 高砂熱学工業株式会社 filed Critical Takasago Thermal Eng Co Ltd
Priority to JP2001367430A priority Critical patent/JP3842631B2/en
Publication of JP2003166729A publication Critical patent/JP2003166729A/en
Application granted granted Critical
Publication of JP3842631B2 publication Critical patent/JP3842631B2/en
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

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Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00Constructional details common to different types of electric apparatus
    • H05K7/20Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20709Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
    • H05K7/20718Forced ventilation of a gaseous coolant
    • H05K7/20745Forced ventilation of a gaseous coolant within rooms for removing heat from cabinets, e.g. by air conditioning device

Abstract

(57) [Summary] [PROBLEMS] To locally process high-density exhaust heat from communication / information processing equipment, and to implement air conditioning that saves space and energy as a whole. SOLUTION: A rack L on which a device 2 such as a server is mounted.
The local cooling device 21 is installed above each passage space X between the rack rows A and B and between the rack rows C and D. The local cooling device 21 is suspended from a ceiling 25. An opening 4 is provided on a side surface of the rack L, and a blower 1 is provided on an upper portion of the rack L. Low-temperature conditioned air from the local cooling device 21 is taken into the rack L from the opening 4 and the exhaust heat from the device 2 is locally processed. Local cooling device 2
1 is separated from the rack L and installed independently.
Even if a failure occurs in some of the local cooling devices 21, the fluctuation of the static pressure is small. In addition, it is easy to handle existing equipment and has good maintenance.

Description

Description: BACKGROUND OF THE INVENTION [0001] The present invention relates to a communication / information processing device.
Air conditioning system for rooms with high heat generation density, such as equipment rooms
The present invention relates to a system and an operation method thereof. 2. Description of the Related Art A so-called electronic device housing a large number of computers
In computer rooms, most air conditioning loads are sensible heat loads.
The average heat generation density per floor area is 500w / m
2 It is about. Construction and maintenance in such facilities
And the ability to disperse heat sources.
For all reasons, all sensible heat treatment type package air conditioners are often used
Have been. The room structure of these facilities is
Power and signal cables need to be routed
Many of them have a double-floor structure, with an underfloor chamber.
Used as a line space. [0003] In air conditioning using a package air conditioner,
Since the underfloor chamber is used as an airway,
The air conditioner has an upper suction and lower blow method.
Low-temperature air processed by the package air conditioner
The equipment is transported through a chamber to an installation location such as a computer.
The low-temperature air is introduced into the equipment housing through the opening provided at the bottom.
Section to treat the exhaust heat from the equipment. [0004] The configuration of such a conventional air conditioning system is shown in FIG.
It is shown in FIG. All-sensing heat treatment type package airco
101 is a direct expansion type cooling coil 102 and a blower 103
The direct expansion type cooling coil 102 is installed outside the equipment room M.
Connected to the installed outdoor unit 104 by refrigerant piping 105
I have. This fully sensible heat treatment type package air conditioner 101
The temperature of the air blown out is usually 15-20 ° C,
Exhaust from the computer 106 (double floor underfloor chamber 107)
Through the opening 108 at the bottom of the computer 106
From the opening 109 on the floor F of the equipment room M
Air mixed with air blown into M,
The return air temperature to the air conditioner 101 is about 25 ° C.
You. Therefore, the packaged air conditioner 1
01 is about 5-10 ° C. Current product
1 packaged air conditioner of all-sensing heat treatment type
Cooling capacity is about 10-40 kW,
Along the outer peripheral wall of
The air conditioner is installed to perform indoor air conditioning. [0005] Further, the package aircopper of the all-sensible heat treatment type is used.
Direct expansion type cooling such as general package air conditioner
The control target range of the refrigerant evaporation temperature of the cooling coil 102 is an example.
For example, the value is constant at about 2 to 6 ° C. Sky like this
The indoor humidity when cooling indoors using a controller is a direct expansion type.
It depends on the amount of dehumidification in the cooling coil 102. This dehumidification
The amount is determined by the refrigerant evaporation temperature and the cooling load.
It depends on the operation time of the controller. Therefore, the indoor humidity should be
In rooms that need to be maintained at a constant level, a separate dehumidifier or humidifier
It is necessary to control the humidity by installing a throat. [0006] By the way, the Internet
With the spread of Internet, business using the Internet
It has increased. Many to develop these businesses
Communication and information processing facilities have been constructed. In these facilities
In the communication and information processing equipment room, as shown in FIG.
Multiple communication and information processing devices such as servers and routers
Many racks L are arranged in the equipment room. These services
Most of the air conditioning heat loads are sensible heat loads.
Density is getting much bigger than general computer room
I have. Heat density per floor area is 1000W / m
2 Some facilities have exceeded this number, and this trend will continue for some time.
It is considered to be. [0007] The air conditioning of the equipment room having such a high heat generation density is performed.
To do so, all the conventional methods used in the computer room
The number of installed sensible heat treatment type package air conditioners 101
In the method of increasing according to the load, the package air conditioner 10
1, the number of installations has increased significantly, and only the equipment room walls in the facility
Then, there is a possibility that the indoor unit cannot be installed. In addition,
In the method of adding cage air conditioners, the indoor unit
Not only is it difficult to secure airflow, but also
This causes a significant increase in the blowing energy.
In addition, the floor area of the equipment room becomes larger,
When the amount of communication cables increases, the
Inability to blow air uniformly, making it an essential communication and information processing device
The cooling capacity varies. Also local in the equipment room
If there is an area with a high heat generation density, increase the airflow.
It is necessary to lower the heating and blowing temperature,
Local response is difficult with stems. Further, as already described, a general package
When using the air conditioner 101 to cool the room,
When the heat load is small and the infiltration moisture from the outside air is large
Means that the indoor temperature is set relatively quickly because the sensible heat load is small.
In order to reach the temperature, empty without sufficient dehumidification
The control will stop. When the sensible heat load increases,
The air conditioner is operated continuously, and the air conditioner
Condensation occurs in the cooled cooling coil, and the dew point temperature of
The dehumidification is performed until the surface temperature of the cooling coil is reached. This
In general package air conditioners, the amount of dehumidification is sensible
Because it varies depending on the size of the load,
Maintains a constant indoor humidity in equipment rooms and communication / information processing equipment rooms
In rooms and rooms that need to be installed, special dehumidifiers are provided separately.
Must increase initial costs.
Become. When the sensible heat load is large,
The operating time of the air conditioner is longer, but the amount of dehumidification is
It depends on the time, etc. Excessive dehumidification
In such cases, humidification is performed with a humidifier while dehumidifying with a cooling coil.
Energy may be wasted. The present invention has been made in view of the above points.
In the rack where the communication and information processing equipment is mounted.
Effectively treating equipment exhaust heat to reduce air conditioning heat load
In both cases, the installation space for air conditioning equipment was devised to
Its purpose is to solve the problem. Also in the present invention
Described above using an air conditioner such as a package air conditioner.
When air conditioning the entire communication / information processing equipment room,
By devising control target values and operating methods between air conditioners,
Humidity adjustment (reduction) without using special equipment such as dehumidifiers
Its purpose is to make adjustments related to humidity. [0011] In order to achieve the above object,
According to the first aspect, the communication / information processing equipment is vertically moved.
The racks mounted on the
Empty the communication / information processing equipment room where multiple
Adjusting system, formed between the rows of racks
Local cooling above the space to cool the space
Equipment is provided structurally separated from said row of racks,
The local cooling device is located on the floor of the communication / information processing equipment room.
Outlets provided to face the communication and information
Suction to take in air from the headspace inside the processing equipment room
Communication / information processing equipment characterized by having a mouth
An air conditioning system for a room or the like is provided. In this manner, the racks are formed between the rows of racks.
Only in the upper part of the space where
Temperature of the air outlet facing the floor and the upper space of the equipment room.
A local cooling device with a suction port to take in air
By arranging, racks can be exchanged and moved freely.
And the space formed between the rows of racks
Can be locally cooled, and the space
Through this, the heat load on the rack can be reduced.
Furthermore, the local cooling device is structurally separated and independent of the row of racks
And the arrangement of indoor units and rack rows.
Flexibility is improved, for example, racks are exchanged in existing facilities.
In the case of switching, it is possible to respond quickly. Ma
Since the area around the local cooling device is open space,
It is necessary to balance the indoor unit to be
No need. Changing the air volume of the blower installed in the indoor unit and the rack
The degree of freedom is high. Therefore, for example, provided in a local cooling device
If the blower fails, the static pressure in the space does not change.
There was almost no change in the ventilation of the rack.
There is little decrease in rejection performance. Rack rows are part of the equipment room
In the event that the facilities are added or
And additional local cooling devices corresponding to the additional rack rows
To reduce the initial investment.
come. Furthermore, above the space formed between the rows of racks
The installation of a local cooling device on the side of the
Does not bring great. Furthermore, the area around the local cooling device is open.
The maintenance space of the local cooling device is good because it is a discharge space.
It is good. The communication / information processing equipment referred to in this specification
The room is where the communication and information processing equipment described above is installed
Rather than just say the room, high calorific value and high density
Rooms with heating equipment installed in
You. Therefore, it may be a computer room. In addition, communication
Information processing devices are servers and other types of computers.
Computer equipment, communication equipment, and arithmetic processors
You. Above the space formed between the rack rows
Only when a local cooling device is installed,
Room for heat-density rooms, but somewhat smaller
In a room with a high heat generation density, only above the passage space
Rack cooling efficiency by installing a local cooling device
Can do well. In other words, if there are multiple rack rows,
Local to all of the space formed between each row of racks
Instead of installing a cooling device, every other space
Only install a local cooling device above the aisle passage space.
With this, it is possible to handle the rack heat load of all rack rows.
It becomes possible. In the case of the first aspect, each of the racks is
Openings in the space facing the space formed between the rows
In the case of claim 2, the portion facing the passage space is provided.
With an opening inside the rack
Air blower to exhaust air out of the rack.
Is desirable. Depending on the operation of the blower, the space
The conditioned air from the local cooling device supplied to the road space
It can be taken into the rack from the opening,
Waste heat from communication and information processing equipment installed in the rack
Processing can be performed more effectively. like this
When using a rack with a complicated structure,
Communication and information processing equipment installed in the rack
It is possible to effectively carry out such a waste heat treatment.
Therefore, the cost for double floor installation can be reduced.
Can be easily renovated in existing equipment room without double floor
be able to. Even if there is no blower above the rack, for example,
Communication and information processing equipment mounted on the
And the direction of air supply and exhaust by each blower is
Communication and information processing equipment installed in the
Configuration. In this case, the server
Such unique transmissions provided in communication and information processing equipment.
Only operation of a blower (usually a small blower is common)
The conditioned air is taken into the rack from the space and passage space.
Can be put in and exhausted. As a result, the communication
It is also possible to carry out exhaust heat treatment of information processing equipment. In view of such an operation, each communication / information processing
The direction of air supply and exhaust by the blower equipped with the equipment is, for example,
Blows on specific aspects of each communication and information processing device
Machine is installed on the rack, etc.
It is preferable that all communication / information processing devices be the same. [0018] The rack wherein the rack forms an underfloor chamber.
When installed on the floor, formed between the rack rows
The lower surface of the space to be opened is open to the underfloor chamber.
A mouth is formed and, as already mentioned, on the rack
Blower for exhausting the atmosphere inside the rack to the outside of the rack
Is installed or each communication and information processing equipment is
It is preferable that the air supply and exhaust directions of the blowers
No. In this case, the static pressure in the underfloor chamber is the static pressure in the equipment room.
Must be higher than the
The conditioned air is supplied by an air conditioner other than the local cooling device.
Have been. Therefore, the opening leading to the underfloor chamber
Air is blown into the equipment room from inside the double floor
You. Of the space formed between the rack rows,
The space where the local cooling device is installed in the upper
In the road space, conditioned air blown out from the local cooling device
And the conditioned air blown out from the floor opening are mixed
Sucked from the opening formed on the side of the rack
After cooling the equipment stacked in the rack,
Air is exhausted by a blower of a blower, a communication device, or the like.
In addition, the space where the local cooling device is not installed in the upper space
Conditioned air blown out from the floor opening in the room
Used for air conditioning. And on that double floor
The racks are installed, and the space and
There is an opening on the underside of the
Then, the conditioned air can be introduced into the rack from the side of the rack.
You. Communication equipment is mounted horizontally on shelves and slots in the rack
It is possible to directly introduce each communication by introducing from the side.
Equipment etc. can be cooled, and efficiency is high. The opening leading to the underfloor chamber is
Air amount adjustment for adjusting the amount of air passing through the opening
Preferably, a mechanism is provided. For example, the air volume adjustment mechanism
For example, it can be adjusted for each floor panel.
Can be changed freely.
Wear. Therefore, a local cooling device is installed in the upper space
Air and air passage space
And the shape of the airflow can be arbitrarily changed. Air volume
As an adjustment mechanism, for example, the aperture ratio of the opening is gradually adjusted.
Or a shutter that can be changed continuously.
Can be Atmosphere in the rack is placed on the upper part of the rack.
If multiple blowers are installed to exhaust air,
In order to keep the temperature of the
For example, controlling the number of operating units by a number control device
The extra air-conveying energy in a rack where
Lugi can be reduced. The local cooling device is provided for each local cooling device.
Of the space or passage space formed between the lower rack rows
It controls the cooling capacity of each local cooling device based on the temperature.
In this way, an efficient and appropriate rack is formed between the rows of racks.
Perform air conditioning in the space or aisle space to discharge the rack.
Heat treatment can be performed. In addition, areas with high heat generation density
In (a), the cooling capacity of the local cooling device is partially increased
Operation is possible,
Variations can be handled. In addition, one of the local cooling devices
The cooling capacity of the local cooling device is maintained even when the
By performing operations that partially increase the power,
Temperature rise in the space formed between the rack rows and the passage space
Can be suppressed. The local cooling device has a direct expansion as a cooling means.
A coil, and a refrigerant evaporation temperature of the direct expansion coil.
Control to be higher than the dew point temperature of the process air.
If it is mounted on a rack, etc.
Accidents due to water leaks, etc.
Condition can be prevented. In this case, if necessary
Make sure that the atmosphere inside the equipment room matches the set dew point temperature.
An outdoor air conditioner that supplies air indoors after dehumidifying
The air dew point temperature exceeds the set value due to a malfunction of the outside air conditioner, etc.
Provide a dehumidifying device to reduce the humidity to the set value when
This facilitates such so-called thirst coil operation control
Can be done. According to the air conditioning method proposed by the present invention,
Without providing a dedicated dehumidifying device as described above,
Coil operation control can be performed easily.
Separate air conditioner to supply conditioned air to information processing equipment room, etc.
These air conditioners have a direct expansion type cooling coil.
The air conditioner shall have a built-in
The control target value of the refrigerant evaporation temperature of the air conditioner is
Set the refrigerant evaporation temperature lower than the control target value, and
If the dew point temperature of the
The cooling coils of some air conditioners may be condensed.
No. This eliminates the need for a dedicated dehumidifying device,
The dew point temperature of the inside air can be changed, and the local cooling device
In this case, it is possible to easily control the operation of the thirst coil of another air conditioner.
The set value of the medium evaporation temperature is used to determine the refrigerant evaporation temperature of other air conditioners.
By changing the value within the range lower than the set value,
The dew point temperature of the air may be changed. Some of the air conditioning equipment
Other than when the dew point temperature of the indoor air falls below the set value.
Should be operated continuously regardless of the room temperature.
Is also good. At this time, the other air conditioner sets the room temperature close to the set value.
The cooling capacity is adjusted to match the sensible heat load.
The cooling capacity of the entire air conditioning system
Is achieved. In such an air conditioning method, the sensible heat load is
Especially suitable for communication equipment wet and computer rooms that are significantly larger than the load.
are doing. When the sensible heat load is further reduced,
Means that the refrigerant evaporation temperature of the air conditioner gradually decreases,
The dew point temperature of the indoor air also decreases. And the indoor air temperature
When both the temperature and the dew point temperature fall below the set values,
By operating the air conditioner of some sections to stop, extra
Energy consumption due to dehumidification and cooling can be eliminated
You. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described.
The form will be described with reference to the drawings. FIG. 1 shows a first embodiment.
Communication and information processing equipment room with air conditioning system
The outline of the state in which equipment room R is shown. This illustrated
In the example, a rack L with communication and information processing equipment
Are installed in four rows, between rack rows A and B and
A passage space portion X is formed between the rack rows C to D. What
The space between the rack rows B to C is a space formed between the rack rows.
Y is formed. In a communication / information processing equipment room of this kind,
Rack L used for maintenance and inspection on the front and back
Doors (not shown) that can be opened and closed
In many cases, the dimensions of the lock L are the same in the same row.
No. In addition, devices such as servers mounted on the rack L
Is on a rail (not shown) provided in the rack L.
And are stacked in multiple stages. Also, in the present embodiment, each rack row
The front or back of each rack L
However, in this way, the front of the rack L is
It is desirable to install them facing each other. Like this
The simple passage space portion X usually has a width of about 900 mm.
You. The atmosphere in the rack L is placed on the top plate of each rack L.
A blower 1 for exhausting the air outside the rack is provided. The rack L itself is, as shown in FIG.
Equipment 2 such as various communication and information processing equipment such as bars
This casing has a casing 3 for storing
Openings 4 are formed on the side faces of the passage 3 facing the passage space X.
Is formed. The opening 4 is a hole of a punched metal.
Or a slit or the like. This
If there is a door on the side, pinch the door itself.
Metal, or have slits on the door
Thus, the opening 4 may be created. As shown in FIG. 3, the equipment room R has a double floor structure.
The underfloor chamber 11 is formed under the floor surface F.
Has been established. Each rack L is installed on the floor F
And the floor surface F under the rack L does not pass through the underfloor chamber 11.
Opening 12 is provided. In addition, the rack on floor F
If necessary, the underfloor chamber 11
Openings 13 and 14 are provided. Each of the openings 12, 13, 14 of the floor F has an opening.
Air amount adjustment mechanism that can change the air flow rate arbitrarily
If a shutter is installed, more cooling air
Supply air-conditioned air near the racks where
And can be done. Adjustment of such aperture ratio
Can adjust the shape of the air flow in the passage space X.
Conditioned air can be uniformly supplied to the rack L
ing. Above each passage space portion X, a row of racks
A plurality of local cooling devices 21 are installed in a structurally separated manner.
ing. The local cooling device 21 was opposed to the lower floor F.
Removes high-temperature air from the outlet 22 and the upper space of the equipment room R.
It has a suction port 23 for putting in, and a blower 24,
Supply low-temperature conditioned air to the lower passage space X, and
High-temperature air exhausted from the
You. The installed number of the local cooling devices 21 faces the passage space X.
It is determined according to the magnitude of the heat generation density of the rack L. The local cooling device 21 is, for example, a ceiling portion of the room R.
25 and suspended structurally from the row of racks.
Is placed. Therefore, the area around the local cooling device 21 is an open space.
Has become. Not limited to this, for example, independent of the rack L
The local cooling device 21 on a support or a gantry standing from the floor F
May be installed. The local cooling device 21 has a cooling coil 26.
are doing. The cooling coil 26 is a direct expansion type cooling coil.
And installed outside the equipment room R as shown in FIG.
The refrigerant pipe 28 is connected to the outdoor unit 27. cold
The medium passes through an electronic expansion valve 29 for adjusting the refrigerant flow rate
Then, it is supplied to the cooling coil 26.
The refrigerant pipe 28 passes through the upper part in the equipment room R, for example.
And several local cooling devices 21 for one outdoor unit 27.
Can be connected. The outdoor unit 27 is air-cooled,
Any type of water cooling can be used. Each of the local cooling devices 21 has a lower passage space.
A temperature sensor (not shown) for detecting the temperature of the
Temperature sensor for detecting the refrigerant evaporation temperature
(Not shown) for signal processing and electronic expansion.
A controller / electrical device for adjusting the opening of the expansion valve 29
It has a source box (not shown). Furthermore, each local cold
Control and monitor the operation of the entire cooling device 21 and operate the compressor.
A controller (not shown) for determining the transfer capacity
It is provided on the outer unit 27. The outdoor unit 27 and the local circulation device 21
Trawlers exchange data sequentially.
And stable operation control. At this time, the cooling coil
The refrigerant evaporation temperature of the refrigerant 26 is calculated based on the indoor dew point temperature in the equipment room R.
And is usually operated as a dry coil.
It is supposed to be. In addition, the casing of the local cooling device 21
The body bottom plate is located at least immediately below the cooling coil 26.
Is also used as a waterproof pan.
If it occurs, it accumulates in this bottom plate and the lower rack L
It is designed to prevent dew condensation on the equipment 2 inside
You. In addition, dew condensation accumulates in the bottom plate and exceeds a certain amount.
Alarm and forced operation by the condensation sensor (not shown)
Rotation, forcibly closing the electronic expansion valve 29, and stopping the compressor of the outdoor unit 27.
Embedded in the controller program so that
It is rare. Dry coil of such a local cooling device 21
In order to ensure the operation, the equipment room R has
Management unit 31 is provided. This outside air treatment unit
G is provided with a cooling coil 32 and a blower 33, for example.
After adjusting the humidity of the introduced outside air OA, it enters the equipment room R.
It is configured to supply. In the equipment room R, a package airco
34 is installed. This package air conditioner 34
Is a conventional all sensible heat treatment type package air conditioner.
The outdoor unit 37 includes an expansion coil 35 and a blower 36, and a refrigerant
They are connected by a pipe 38. And underfloor chamber 1
For example, supply conditioned air of about 15 ° C. to 20 ° C.
ing. The package air conditioner 34 is mounted on the wall of the equipment room R.
Air conditioning and passage space other than passage space part X
It plays an auxiliary role in cooling the part X. The air conditioning system according to the present embodiment
The exhaust heat from each rack L is configured as above.
Discharged above rack L by blower 1 above rack L
And the local cooling device 21 together with the air in the upper part of the equipment room R.
Is sucked from the suction port 23 of the
And cooled. Cooled air, eg 18 ° C
The cooling air of each passage space portion X is blown by the blower 24.
It is blown out toward the floor F. The cooling air is provided at the front of the rack L.
Of the equipment 2 introduced into the rack L through the opening 4
Treat heat. On the other hand, in the underfloor chamber 11, the package
Air-conditioned air from the air conditioner 34, for example, 15 ° C to 20 ° C
Air is blown out, and the conditioned air is
It flows into the rack L through the opening 12 at the bottom, and the equipment 2
To treat the exhaust heat. The air-conditioning air from the underfloor chamber 11
Air can also pass through the opening 14 provided on the floor F of the passage space X.
It is blown out to the road space part X and is provided in front of the rack L.
Introduced into the rack L from the opening 4
Exhaust heat is being processed. Therefore, the equipment 2 inside the rack L
The cooling effect of each stage is improved more than before. This place
The static pressure in the underfloor chamber 11 is higher than the static pressure in the equipment room R.
Is getting higher. FIG. 3 shows that the static pressure in the underfloor chamber 11 is
The case where the pressure becomes lower than the static pressure in the chamber R is shown.
This increases the total displacement of the blower 1 in all the racks L,
Exceeded total air flow of heat treatment type package air conditioner 34
What happens if. In this case, the floor leading to the underfloor chamber 11
The flow of air at the openings 13 and 14 of the surface
Head to the underfloor chamber 11. The conditioned air in the passage space X is
From the opening 4 provided on the side surface of the rack L into the rack L
The flow of sucked air and the floor floor opening 14
After being sucked into chamber 11 once, the bottom of rack L again
Of air sucked into the rack L from the opening 12 of the section
There is. In this case, the opening 14 of the floor surface F of the passage space X
By increasing the area and aperture ratio of the
Air mixing loss
Gone. Further, in the present embodiment, the outside
Since the air treatment unit 31 is installed, the local cooling
It is possible to ensure that the dry coil operation of the device 21 is performed.
The occurrence of dew is suppressed as much as possible. In this embodiment, the local cooling device 2
1 is installed structurally separated from each rack row
Therefore, in the case of additional construction to existing facilities,
But it is excellent. A rack L in a part of the equipment room R
If the calorific value of the
It is sufficient to install the local cooling device 21 only in the designated area,
It is possible to cope with uneven distribution of heat generation load. Such a place
The construction is easy in both cases. In addition, the local cooling device 21 itself is maintained.
Even when performing protection, the area around the local cooling device 21 is an open space.
Therefore, workability is also good. FIG. 4 shows the local cooling device 21 in the passage space X.
Of the temperature control method and the air flow shape adjustment example
The state inside the space part X is shown. In this example, each local cold
The transfer devices 21a to 21e are installed at equal intervals along the row of racks.
Is placed. And the temperature in the lower passage space X
Is detected by the temperature sensor T and cooled down to the set temperature.
By a controller (not shown) to adjust the capacity
Control is being performed. For example, one local cooling device 2
If 1b fails, the temperature of the passage space X around it
Temperature rises, but is adjacent to the failed local cooling device 21b.
Other local cooling device 21a and local cooling device 21c
By increasing the capacity, the temperature rise in the passage space X will be small.
It becomes a kana thing. In this example, in the passage space X,
Position of the opening 14 of the floor F
It is located at a position between each local cooling device 21
The supply amount of the conditioned air from the substation cooling devices 21a to 21e
The air-conditioning air amount in a relatively small area can be supplemented. Ma
Number of operating blowers 24 of the local cooling devices 21a to 21e
Control the temperature of the exhaust air from the rack L
You may make it implement. For example, when the load is small
Can be dealt with more practically. FIG. 5 shows a latent heat treatment part in addition to the external tone controller 31.
The example which installed the package air conditioner 41 is shown. Through
Normally, the intake outside air OA is adjusted in humidity by the external controller 31.
It is supplied to the equipment room R. Dry coil of local cooling device 21
Indoor dew point temperature control is important for operation.
In the event that the external controller 31 fails or its performance deteriorates,
A small number of package air conditioners 41 for latent heat treatment were installed.
Have been. Cooling of package air conditioner 41 for latent heat treatment
Refrigerant evaporation temperature T in coil S The cooling of the local cooling device 21
Medium evaporation temperature T E Lower than the set dew point temperature T R Than
(T E > T S > T R ), The external controller 3
1 enables humidity adjustment at the time of abnormality. Also latent heat treatment
The number of package air conditioners 41 is, for example, 1
000W / m 2 , The amount of outside air intake is the ventilation frequency of the equipment room R
And about 0.5 times an hour, the cooling capacity of the entire room
A package air conditioner 41 for latent heat treatment with a capacity of about 5%
It can be installed, and it is installed on the wall as shown
Replaced part of the package air conditioner 35
The package air conditioner 41 for latent heat treatment
No. In the above example, the rack L is installed.
Although the floor was a double floor, the present invention
In addition, it can be applied to rooms without double floors. This place
In this case, the package air conditioner 34
Therefore, the upper outlet and the lower inlet are used. Such two
Cooling capacity is enhanced by applying the present invention to a room without a double floor
Is also possible. Therefore, the existing equipment room is
Thus, the present invention can be easily dealt with. In the above example, the drying of the local cooling device 21 is performed.
In the equipment room R to ensure the coil operation
Is a package for latent heat treatment together with the outside air treatment unit 31
Air conditioner 41 was installed, but outside for such dehumidification
Without installing the air treatment unit 31, as shown in FIG.
As shown in FIG.
By changing the operation control of the air conditioner 34a,
By performing such a dry coil operation, the cooling of the local cooling device 21 is performed.
The dew condensation of the cooling coil may be prevented. That is, the cooling of the package air conditioner 34a
The control target value of the medium evaporation temperature is changed to another package air conditioner 3
And set it lower than the control target value of the refrigerant evaporation temperature.
The package air conditioner 3 gives priority to the moisture in the equipment room R.
Condensation is caused by the cooling coil 4a. to this
Therefore, the rise in dew point temperature in the equipment room R is suppressed, and
Since the refrigerant evaporation temperature is controlled at a nearly constant value,
Dehumidification amount becomes excessive and dew point temperature falls below the set value
Nor. Another example of the operation of these air conditioners is as follows.
For example, the processing air volume of the package air conditioner 34 is reduced.
By eliminating this, it becomes a package air conditioner for dehumidification.
Can be used. In other words, the same cooling coil
Package air by reducing the processing air volume.
Refrigerant evaporation temperature can be easily maintained lower than ACON 34
Therefore, in the implementation of the present invention, a favorable operating state is obtained.
You. The package air conditioner 34a has a variable air volume function.
Provide a function to change the control target value of the refrigerant evaporation temperature
In terms of hardware, the same air conditioner can be used.
Air conditioning load condition (ratio of sensible heat load to latent heat load)
Each package air conditioner 34 is sensible heat treatment type or
Can be changed at any time for dehumidification and flexibility
Get higher. A plurality of indoor units are connected to one indoor unit.
High-sensitivity heat treatment type package air conditioner (multi
Type) operates in addition to the above-mentioned change in the processing air volume.
Reducing refrigerant evaporation temperature by reducing the number of indoor units
It can be easier to maintain. FIG. 8 shows the suction of a package air conditioner.
The cooling coil surface temperature corresponding to the air temperature is used as the refrigerant evaporation temperature.
An example of trial calculation for each case is shown below. The surface temperature of the cooling coil
To evaporate refrigerant temperature, process air temperature, heat inside and outside the cooling coil
Determined by the transmission rate. The heat transfer coefficient outside the cooling coil
Varies depending on the wind speed passing through the cooling coil. Cooling carp
When the heat transfer resistance is ignored, the surface temperature of the
It is. t w = T in + H out / (H in + H out ) × (T out -T in ) (1) where t w : Cooling coil surface temperature [° C] t in : Average temperature of low-temperature fluid (refrigerant) [° C] T out : Average temperature of high temperature fluid (air) [℃] h in : Heat transfer coefficient [kW]
/ (M 2 K)] h out : Heat transfer coefficient of outer surface of tube [kW / (m 2 K)] For example, processing air temperature (suction air temperature)
Of the package air conditioner 34a for dehumidification under the condition of
When operating at a medium evaporation temperature of 6 ° C, the cooling coil surface
The temperature will be 12 ° C. Passing air is cooled on the cooling coil surface
Then, the humidity is reduced until the dew point temperature becomes about 12 ° C. And
Therefore, the same applies to other packaged air conditioners 34.
Of the target value of the refrigerant evaporation temperature
If the surface temperature is set higher than 12 ° C,
It can always be operated with a dry coil. In addition, the package
Arbitrarily change the refrigerant evaporation temperature of the air conditioner 34a.
Thus, it is possible to change the dew point temperature of the indoor air.
You. In addition, some package air conditioners for dehumidifying
When the dew point temperature of the indoor air falls below the set value.
Other than the above, operate continuously regardless of the room temperature.
Or the dew point temperature of the indoor air falls below the set value, and
Stop operation only when the internal air temperature falls below the set value.
You may make it so. The local cooling device used in the above embodiment
The installation has suction ports 23 on both sides and cooling coils 26
Was also provided vertically in the same direction as the suction port 23.
Although it was a configuration, the local cooling device applicable in the present invention is:
The configuration is not limited to this. For example, suction port, blowing
Both outlets are oriented in the direction facing the floor, and
Both outlets are aligned along the longitudinal direction of the space or passage space
The cooling coil is also installed in the local cooling device.
At right angles to the direction of the airflow flowing from the inlet to the outlet
Of course, the type arranged in can also be used.
In this case, a sirocco fan can be used for the blower.
You. In such a local cooling device, the lower part of the cooling coil
There is also the aspect that the drain pan to be installed in is easy to install. According to the present invention, a communication / information processing device
Space-saving in facilities with high-density exhaust heat
Appropriate exhaust heat treatment can be performed under energy
You. Moreover, maintenance work and the like are easy. The sky of the present invention
According to the control method, the simple operation of air conditioning equipment in the facility
Low cost and high flexibility by adding functions and improving the operation method
It is possible to easily implement humidity control
You.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram schematically showing an equipment room to which an air conditioning system according to an embodiment of the present invention is applied. FIG. 2 is an explanatory diagram showing a state in which conditioned air is taken into a rack in the air conditioning system according to the embodiment of FIG. 1; FIG. 3 is an explanatory diagram showing the flow of air when the static pressure in the underfloor chamber is lower than the static pressure in the equipment room in the air conditioning system according to the embodiment of FIG. 1; FIG. 4 is a side view showing a state in a passage space for explaining an example of operation control in the present invention. FIG. 5 is an explanatory diagram schematically showing an equipment room to which an air conditioning system according to another embodiment of the present invention is applied. FIG. 6 is an explanatory diagram showing an example in which the present invention is applied to an equipment room without a double floor. FIG. 7 is an explanatory diagram schematically showing an equipment room to which an air conditioning system according to another embodiment of the present invention is applied. FIG. 8 is a graph showing a relationship between a dry-bulb temperature of processing air and a cooling coil surface temperature. FIG. 9 is an explanatory diagram of a conventional technique. FIG. 10 is a perspective view showing an outline of a general communication / information processing equipment room. [Description of Signs] 1 Blower 2 Equipment 4 Opening 11 Underfloor chambers 12, 13, 14 Opening 21 Local cooling device 22 Outlet 23 Inlet 26 Cooling coil 27 Outdoor unit 31 Outside air processing unit 34 Package air conditioners A, B, C, D Rack row F Floor L Rack R Equipment room X Passage space Y Space

Claims (1)

  1. Claims: 1. A rack in which communication / information processing equipment is vertically mounted is arranged to form a rack row, and a communication / information processing equipment room or the like in which a plurality of rack rows are installed is air-conditioned. A local cooling device for cooling the space above the space formed between the rows of racks.
    The local cooling device is disposed so as to be structurally separated from the rack row, and an outlet provided to face the floor of the communication / information processing equipment room, An air conditioning system for communication and information processing equipment rooms, which has a suction port for taking in air in the upper space. 2. A space formed between two rack rows facing each other among the spaces formed between the rack rows is a passage space, and the local cooling device is provided only above the passage space. The air conditioning system for a communication / information processing equipment room or the like according to claim 1, wherein: 3. The rack has an opening at a portion facing a space, and a blower for exhausting an atmosphere in the rack to the outside of the rack is provided at an upper portion of the rack. The air conditioning system for a communication / information processing equipment room or the like according to claim 1. 4. The rack has an opening at a portion facing the passage space, and a blower for exhausting an atmosphere in the rack to the outside of the rack is provided at an upper portion of the rack. The air conditioning system for a communication / information processing equipment room or the like according to claim 2. 5. The rack has an opening at a portion facing a space, and further includes a communication / communication device mounted on the rack.
    2. The information processing device according to claim 1, wherein the information processing device has a unique blower, and the direction of air supply and exhaust by each of the blowers is the same between the communication and information processing devices mounted on the rack. Air conditioning systems for communication and information processing equipment rooms. 6. The rack has an opening at a portion facing the passage space, and the communication / information processing equipment mounted on the rack has a unique blower, and each of the blowers supplies and exhausts air. The direction is the same between the communication and information processing devices mounted on the rack.
    An air conditioning system for a communication / information processing equipment room or the like according to claim 2. 7. The rack is installed on a double floor constituting a below-floor chamber, and an opening communicating with the below-floor chamber is formed on a floor surface in a space formed between the rows of racks. Claims 1, 2,
    7. The air conditioning system for a communication / information processing equipment room or the like according to any one of 3, 4, 5, and 6. 8. A floor surface facing the lower surface of the rack,
    The air conditioning system for a communication / information processing equipment room according to claim 7, wherein an opening communicating with the underfloor chamber is formed. 9. The communication device according to claim 7, further comprising an air amount adjusting mechanism for adjusting an air amount passing through the opening at the opening leading to the underfloor chamber. Air conditioning system for information processing equipment room. 10. A plurality of blowers for exhausting the atmosphere in the rack at the upper part of the rack to the outside of the rack, and the number of the blowers is controlled to reduce the temperature of the exhaust to a set temperature or less. Claims 3, 4,
    An air conditioning system for a communication / information processing equipment room or the like according to any one of 5, 6, 7, 8 and 9. 11. Based on a result of measuring a temperature of a space formed between lower rows of racks for each local cooling device,
    11. The communication / information processing device according to claim 1, wherein the cooling capacity of each local cooling device is controlled. Air conditioning system for rooms. 12. The local cooling device has a direct expansion coil as a cooling means, and the refrigerant evaporation temperature of the direct expansion coil is controlled to be higher than the dew point temperature of the processing air. Terms 1, 2, 3, 4, 5, 6, 7,
    An air conditioning system for a communication / information processing equipment room or the like according to any one of 8, 9, 10, and 11. 13. The communication / information processing equipment room or the like according to claim 12, further comprising an air conditioner for adjusting the humidity of the atmosphere in the communication / information processing equipment room or the like. Air conditioning system. 14. The method of claim 1, 2, 3, 4, 5, 6, 7,
    Communication described in any of 8, 9, 10, 11 or 12
    This is an air conditioning method using an air conditioning system in an information processing equipment room or the like, which has a plurality of separate air conditioners for supplying conditioned air into the communication / information processing equipment room or the like. It has a built-in cooling coil,
    When the control target value of the refrigerant evaporation temperature of some of the air conditioners is set lower than the control target value of the refrigerant evaporation temperature of the other air conditioners, and the dew point temperature of the indoor air increases. In the air conditioning method, the condensation of the cooling coil of the part of the air conditioners is preferentially performed. 15. The dew point temperature of indoor air is changed by changing a set value of a refrigerant evaporation temperature of some of the air conditioners within a range lower than a set value of a refrigerant evaporation temperature of another air conditioner. The air conditioning method according to claim 14, wherein: 16. The air conditioner according to claim 14, wherein the air conditioner operates continuously irrespective of the indoor temperature except when the dew point temperature of the indoor air falls below a set value. The air conditioning method according to the above. 17. The air conditioner according to claim 1, wherein the operation of the air conditioner is stopped only when the dew point temperature of the indoor air falls below a set value and the temperature of the indoor air falls below the set value.
    The air conditioning method according to claim 14, 15, or 16.
JP2001367430A 2001-11-30 2001-11-30 Air conditioning systems for communication / information processing equipment rooms, etc. Active JP3842631B2 (en)

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