KR20220118786A - Built-up computer room air conditioning system having front wall blowdown and back pressure fan - Google Patents

Abstract

The present invention relates to a constant temperature and humidity device in a data center and, more particularly, to a built-up computer room air conditioning system having a front wall blowdown and back pressure fan, which supplies air to the inside of a computer room through a wall (front surface) of the computer room and discharges the air inside the computer room through a back pressure fan (intake fan) installed on the ceiling of the computer room, to improve energy saving and cooling ability. To this end, the built-up computer room air conditioning system having a front wall blowdown and back pressure fan according to the present invention comprises: an air conditioner body which is installed on the wall of a computer room and supplies the air to the inside of the computer room through the wall; and a return supply unit which is installed on the ceiling of the computer room, to discharge the air inside the computer room to the outside or supply the air to the air conditioner body.

Description

Computer room cooling system with built-up front blowdown and back pressure fan applied {Built-up computer room air conditioning system having front wall blowdown and back pressure fan}

The present invention relates to a constant temperature and humidity constant device for a data center, and more specifically, by supplying air into the computer room through the wall (front) of the computer room and discharging the air inside the computer room through a back pressure fan (intake fan) installed on the ceiling of the computer room. It relates to a computer room cooling system with a built-up front blow-out and back pressure fan with improved energy saving and cooling capability.

In a data center, the temperature and humidity of the room where the IT equipment is installed must be maintained under constant conditions for the stable operation of IT equipment.

The conventional built-up thermo-hygrostat has the advantage of maximizing outdoor air cooling, but has the following problems.

As the air flow path is complicated due to the bottom blowout structure, the static pressure loss is large and the static pressure loss is large. In addition, it is difficult to maintain an even airflow distribution and airflow distribution in the method of taking out the floor through a raised floor, and the ventilation fan of the thermohygrostat cannot actively cope with the load fluctuations of the server.

Specifically, in the conventional floor blowout structure, the air passage area is small and the flow path is complicated, so that the power of the blowing fan is increased. Because the air is blown to the lower part of the narrow raised floor, the discharge wind speed is increased, and the venturi effect or vortex phenomenon occurs, so that the cold air cannot be supplied with sufficient static pressure, resulting in an airflow imbalance.

Since the conventional built-up thermo-hygrostat can control only the air volume according to the load of the entire server rack, the ability to control the load variation of each server is insufficient, resulting in partial hot spots. In addition, since it is a method of discharging hot air depending on the overall airflow flow in the room, the cooling efficiency is lowered due to the generation of recirculation airflow in some sections.

Korean Patent Registration No. 10-1437313

The present invention has been devised to solve the above problems, and an object of the present invention is to reduce the blowing power by reducing the static pressure by simplifying the air flow while maximizing the cooling of the outside air.

Another object of the present invention is to improve airflow distribution to increase cooling efficiency.

Another object of the present invention is to increase cooling efficiency by quickly removing heated air and controlling cooling air according to the amount of load generated to save energy.

To this end, the computer room cooling device with the built-up front blow-out and back pressure fan applied according to the present invention includes the air conditioner body installed on the wall of the computer room and supplying air into the computer room through the wall, and installed on the ceiling of the computer room to remove the air inside the computer room to the outside. and a return supply unit for discharging to or for supplying to the air conditioner body.

The computer room cooling device with the built-up front blow-out and back pressure fan applied according to the present invention is installed on the wall of the computer room to supply air to the inside of the computer room through the wall surface, and the first space and Separated into a second space, an outdoor air damper for controlling the opening degree of the outdoor air inlet and a first betting damper for controlling the opening degree of the first bet inlet are installed in the first space, and the opening degree of the second bet inlet is installed in the second space A second betting damper for controlling the air conditioner and an air conditioner body in which a supply fan for discharging air into the computer room is installed, and installed on the ceiling of the computer room to discharge or supply the air inside the computer room to the outside or to the air conditioner body, A return supply unit including a ventilation fan that sucks in air and an exhaust damper for controlling an opening degree of an outlet for discharging the air inside the computer room to the outside, and the outdoor air damper, the first 1 bet damper, control the second bet damper and the exhaust damper; A control unit for controlling the number is included.

As described above, according to the present invention, it is possible to improve the airflow distribution in the front (wall surface) blowing method. That is, by installing an air supply fan (supply fan) on one wall of the computer room and supplying cooled air to a large area, it is possible to lower the blowing wind speed and improve the airflow distribution, thereby increasing the cooling efficiency.

In addition, the present invention allows active control with a back pressure fan (ventilator fan). In other words, energy efficiency can be improved through active control that adjusts the exhaust amount of the back pressure fan according to the load change of the computer room server to quickly remove the warmed air, reduces cold air in places with little load, and increases cold air in places where there is high load. .

In addition, it is possible to reduce the blowing power by simplifying the conventional complex air flow and minimizing the static pressure loss by expanding the air passage area of the filter, cooling coil (cooling unit) and humidifier (humidity control unit) by removing unnecessary air passages.

By simplifying the conventional complicated air flow and removing unnecessary air passages, the air passage area of the filter, cooling coil, and humidifier is enlarged to minimize static pressure loss, thereby reducing blowing power.

In addition, by installing and controlling the second bet damper, a portion of the circulating air volume can be recirculated without passing through the filter and cooling unit, thereby reducing the blowing power.

As described above, the present invention has the effect of maximizing the reduction of PUE (Power Usage Effectiveness) and energy saving for green IT by reducing the amount of power of the air conditioner installed in the data center.

1 is a block diagram of a computer room cooling device applied with a built-up front blow-out and back pressure fan according to the present invention.
Figure 2 is a block diagram for explaining the operation control of the built-up front blow-out and back pressure fan applied computer room cooling device according to the present invention.
3 is a view showing an electric outdoor unit mode of a computer room cooling device applied with a built-up front blow-out and back pressure fan according to the present invention.
Figure 4 is a view showing a mixed mode of the computer room cooling device applied to the built-up front blow-out and back pressure fan according to the present invention.
5 is a view showing the circulation mode of the computer room cooling device applied with the built-up front blow-out and back pressure fan according to the present invention.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings. The configuration of the present invention and the effects thereof will be clearly understood through the following detailed description.

Prior to the detailed description of the invention, the same components are denoted by the same reference numerals as possible even if they are displayed in different drawings, and the detailed description will be omitted if it is determined that the subject matter of the present invention may be obscured for known configurations. .

Hereinafter, a computer room cooling device applied with a built-up front blow-out and back pressure fan according to the present invention will be described with reference to the accompanying drawings.

1 is a view showing the configuration of a computer room cooling device applied with a built-up front blow-out and back pressure fan according to the present invention.

As shown in FIG. 1 , the computer room cooling device to which a built-up front blow-out and back pressure fan is applied according to the present invention is largely composed of an air conditioner body 100 and a return supply unit 200 .

The air conditioner body 100 is installed on the wall surface (front) of the computer room 20 in which the server rack 10 is disposed, and the return supply unit 200 is installed on the ceiling 23 of the computer room 20 .

The air conditioner body 100 supplies air to the inside of the computer room through the wall surface, and the return supply unit 200 discharges the air inside the computer room to the outside or supplies it to the air conditioner body 100 .

The air conditioner body 100 is divided into a first space 30 and a second space 40 by a structure 110 .

Here, the structure 100 is composed of a filter 111 , a cooling unit 112 , and a humidity control unit 113 . The filter 111 removes dust, dust, etc. of the outside air and the inside. The cooling unit 112 is composed of a cooling coil for cooling the air supplied into the computer room (20). Humidity control unit 113 is composed of a humidifier for controlling the humidity inside the computer room.

In the first space 30 of the air conditioner body 100, an outdoor air inlet 101 through which outdoor air flows into the outer wall portion and an outdoor air damper 102 for adjusting the degree of opening of the outdoor air inlet 101 are installed, and a return supply unit 200 ), the first bet inlet 103 through which the air inside the computer room flows, and the first bet damper 104 for adjusting the opening degree of the first bet inlet 103 are installed.

In the second space 40 of the air conditioner body 100, the second bet inlet 105 and the second bet inlet 106 through which the air inside the computer room flows into the return supply unit 200 is a second bet that adjusts the degree of opening. A damper 104 is installed, and a supply fan (supply air fan) 120 for discharging air into the computer room is installed on the wall surface of the computer room 20 . Here, the supply fan 120 supplies cooled air into the computer room.

A back pressure fan (ventilation fan) 220 for sucking air inside the computer room is installed on the ceiling 23 of the return supply unit 200, and an exhaust port 201 for discharging the air inside the computer room to the outside is installed on the outer wall part and An exhaust damper 202 for adjusting the opening degree of the exhaust port 201 is provided. The air inside the computer room is sucked in by the back pressure fan 220 and discharged to the exhaust port 201 through the ventilation duct 210 or introduced into the air conditioner body 100 through the bet inlets 103 and 105 . Here, the back pressure fan 220 discharges the air (hot air) of the computer room while being controlled according to the load (power amount) of the server rack 10 .

2 is a block diagram for explaining the operation control of the computer room cooling device to which the built-up front blow-out and back pressure fan are applied according to the present invention.

2, the outdoor temperature / humidity sensor 301 is installed on the side of the outdoor air inlet 101 of the air conditioner main body 100 to measure the temperature and humidity of the outdoor air, and the temperature / humidity sensor 302 is the indoor air inlet It is installed on the (103, 105) side to measure the temperature and humidity of the bet.

The first differential pressure sensor 303 is installed on the corridor 21 side of the computer room 20 to measure the cold corridor differential pressure between the air discharged through the supply fan 40 and the corridor air, and the second differential pressure sensor ( 304) is installed on the upper space 22 side of the server rack 10 and cold-hot between the air (heat) discharged from the server rack 10 and the air (cold) discharged through the supply fan 120 ) Measure the differential pressure.

The cooling unit 112 applies a cooling coil (heat exchange coil) in which the working fluid flows, and the humidity control unit 113 applies a configuration for spraying the working fluid. The cooling unit 112 and the humidity control unit 113 each have a valve (not shown) capable of controlling the working fluid, and the opening degree of the corresponding valve is controlled by the control unit 300 .

The control unit 300 receives the outside temperature and humidity and the outside temperature/humidity from the outside temperature/humidity sensor 301 and the inside temperature/humidity sensor 302 to determine the operation mode of the air conditioner.

Here, the operation mode of the air conditioner includes three modes: an electric outdoor air mode, a mixed mode, and a circulation mode. In the outdoor air mode, when the outdoor air condition is better than the indoor air condition, the computer room is cooled without operating the heat source with only outside air. In the mixed mode, cold outdoor air in winter is mixed with indoor air to handle the load in the computer room without operating a heat source. The circulation mode is to circulate the indoor air when the outside air condition is not good and handle the heat load of the computer room through the cooling coil.

The control unit 300 controls the operation of the outside damper 102, the first bet damper 104, the second bet damper 104, and the exhaust damper 202 according to the operation mode. The control unit 300 receives the cold air corridor differential pressure from the first differential pressure sensor 303 to control the number of rotations of the supply fan 120 , and receives the cold and heat differential pressure from the second differential pressure sensor 304 of the ventilation fan 220 . Control the number of rotations.

In addition, the control unit 300 may control the operation of the air supply fan and the ventilation fan based on the differential pressure as well as the temperature, the exhaust air amount of the supply air fan, the amount of power of the server rack, and the like.

Table 1 shows a case in which the operation of the supply fan and the exhaust fan can be controlled by a combination of various factors (control elements). Table 1 shows a combination of factors for control, and is not limited thereto, and various combinations are possible.

Method 1 Method 2 Method 3 Method 4 Method 5 Method 6
differential pressure
(cold-hot zone) differential pressure
(Cold - outer hallway) exhaust air volume
(-differential pressure) temperature
(Hot Zone) temperature
(Hot Zone) exhaust air volume
(-differential pressure) temperature
(Hot Zone) differential pressure
(Cold-Hot Zone) temperature
(Hot Zone) differential pressure
(cold-hot zone) temperature
(Hot Zone) wattage
(Rack)

3 is a view showing the entire outdoor unit mode of the computer room cooling device applied with the built-up front blow-out and back pressure fan according to the present invention.

Referring to FIG. 3 , the outside air damper 102 and the exhaust damper 202 are open and the first bet damper 104 and the second bet damper 106 are closed in the full outdoor air mode.

When the outside air damper 102 is fully opened and outside air is introduced through the outside air inlet 102 , it passes through the first space (mixing chamber) 30 without mixing with the internal air. The outdoor air passing through the first space 30 is filtered by the filter 111 . At this time, the humidity control unit 113 operates to maintain an appropriate humidity.

Then, the outside air is supplied into the computer room through the air supply fan 120 . The air discharged through the air supply fan 120 is mixed with the thermal air of the server rack 100 and discharged to the exhaust port 201 through the back pressure fan 220 .

Figure 4 shows the mixing mode of the computer room cooling device applied with the built-up front blow-out and back pressure fan according to the present invention.

Referring to FIG. 4 , in the mixed mode, the outside air damper 102 , the exhaust damper 202 , the first bet damper 104 and the second bet damper 106 are all open.

When the outdoor air damper 102 is partially opened and a certain amount of outdoor air is introduced through the outdoor air inlet 102 , and a certain amount of indoor air is introduced through the first bet inlet 103 , the outdoor air and the indoor air are introduced in the first space 30 . air is mixed

Meanwhile, the indoor air flowing into the second bet inlet 105 may be adjusted by the second bet damper 106 according to the recovery amount of outdoor heat. If there is no second bet damper 104, since the total circulation air volume passes through the filter 111 and the cooling unit 112, the pressure loss increases and the blowing power increases. However, when the second bet damper 104 is installed to control the second bet damper 104 according to the outdoor air condition and the indoor load, a part of the circulating air volume is recirculated without passing through the filter 111 and the cooling unit 112 . By doing so, the blowing resistance is reduced, and the blowing power can be saved.

Air mixed in the first space 30 is filtered by the filter 111 . At this time, the humidity control unit 113 operates to maintain an appropriate humidity.

Then, the mixed air is supplied into the computer room through the air supply fan 120 . A portion of the mixed air discharged through the supply fan 120 is supplied to the air conditioner body 100 through the back pressure fan 220 and a portion is discharged through the exhaust port 201 .

5 shows the circulation mode of the computer room cooling device to which the built-up front blow-out and back pressure fan are applied according to the present invention.

5, in the circulation mode, the outside damper 102, the exhaust damper 202 and the second damper bet 106 are closed and the first damper bet 104 is open.

Since the outside air damper 102 is closed, outside air is not introduced through the outside air inlet 101 .

The first bet damper 104 is completely open. Indoor air passes through the first space 30 without mixing with outside air. The indoor air is filtered by the filter 111 , and the indoor air is cooled by the cooling unit 112 . Then, the indoor air having a lower temperature is supplied to the inside of the computer room through the air supply fan 120 . Cooling air through the supply fan 120 is circulated to the air conditioner body 100 through the back pressure fan 220 .

The above description is merely illustrative of the present invention, and various modifications may be made by those of ordinary skill in the art to which the present invention pertains without departing from the technical spirit of the present invention.

Therefore, the embodiments disclosed in the specification of the present invention do not limit the present invention. The scope of the present invention should be interpreted by the following claims, and all technologies within the scope equivalent thereto should be construed as being included in the scope of the present invention.

10: server rack 20: computer room
21: hallway 22: upper space
23: ceiling 30: first space
40: second space
100: air conditioner body
101: outside air inlet 102: outside air damper
103: first bet inlet 104: first bet damper
105: second bet inlet 106: second bet damper
110: structure 111: filter
112: cooling unit 113: humidity control unit
120: supply fan (supply fan)
200: return supply
201: exhaust port 202: exhaust damper
210: ventilation duct 220: back pressure fan (ventilation fan)
300: control unit
301: outside temperature/humidity sensor 302: indoor temperature/humidity sensor
303: first differential pressure sensor 304: second differential pressure sensor

Claims (7)

An air conditioner body installed on the wall of the computer room and supplying air into the computer room through the wall;
A computer room cooling device with a built-up front blow-out and back pressure fan installed on the ceiling of the computer room and including a return supply unit for discharging the air inside the computer room to the outside or supplying it to the air conditioner body. According to claim 1,
The air conditioner body is separated into a first space and a second space by a structure composed of a filter unit, a cooling unit, and a humidity control unit,
An outdoor air inlet through which outside air is introduced and a first bet inlet through which bet air is introduced are installed in the first space,
A computer room cooling device using a built-up front blow-out and back pressure fan, characterized in that the second space is provided with a second bet inlet through which the bet is introduced and an air supply fan for discharging air into the computer room. According to claim 1,
The return supply unit includes a ventilation fan for sucking the air inside the computer room and an outlet for discharging the air inside the computer room to the outside. It is installed on the wall of the computer room to supply air into the computer room through the wall, and is separated into a first space and a second space by a structure consisting of a filter unit, a cooling unit and a humidity control unit, and the first space has an opening degree of an outdoor air inlet An external air damper for controlling the and a first bet damper for controlling the opening degree of the first bet inlet are installed, and a second bet damper for controlling the opening degree of the second bet inlet in the second space and supply air for discharging air into the computer room The air conditioner body in which the fan is installed,
It is installed on the ceiling of the computer room to discharge the air inside the computer room to the outside or to supply it to the air conditioner main body, and a ventilation fan that sucks the air inside the computer room and an exhaust damper that controls the opening degree of the outlet that exhausts the air inside the computer room to the outside. a return supply including;
Control the outside air damper, the first bet damper, the second bet damper and the exhaust damper by determining an operation mode based on the outside air temperature and humidity and the temperature and humidity of the outside air, and rotation of the supply fan based on the differential pressure of the cold corridor A computer room air conditioner with a built-up front blow-out and back pressure fan including a control unit for controlling the number and controlling the number of rotations of the ventilation fan based on a cold-hot differential pressure. 5. The method of claim 4,
The operation mode is an outdoor air mode in which the damper and the exhaust damper are open and the first damper bet and the second damper bet are closed,
A mixed mode in which the outside air damper, the exhaust damper, the first bet damper and the second bet damper are all open;
The external air damper, the exhaust damper and the second bet damper are closed and the first bet damper is a built-up front blow-out and back pressure fan applied computer room cooling device, characterized in that it comprises a circulation mode that is open. 5. The method of claim 4,
The control unit is a computer room cooling device using a built-up front blow-out and back pressure fan, characterized in that it controls the second bet damper based on the load and external air conditions of the computer room. 5. The method of claim 4,
The control unit controls the operation of the supply fan and the ventilation fan based on at least one of temperature, differential pressure, exhaust air volume, and electric power.

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