JP2014092802A - Computer room air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent exfoliation of an upper shield to appropriately maintain a pressure difference between cooling air and warming air even in the case that a pressure in a passage space becomes excessively higher than an outside pressure.SOLUTION: In a computer room air conditioning system, an upper shield is provided between top surfaces of racks on both sides of a passage 4 where cooling air flows, and end part shields are provided at both end parts of the passage 4. A passage space S is partitioned by the upper shield and the end part shields. A first ventilation part 31 and a second ventilation part 42 which can be opened/closed to the upper shield and the end part shields are provided. Each of the ventilation parts 31 and 42 is provided with a master blade 36 which can be opened/closed to the passage 4, a slave blade 37 capable of opening/closing an opening 36b formed on the master blade 36, and a leaf spring 38 which urges the slave blade 37 in a direction in which the opening 36a is closed.

Description

  The present invention relates to a computer room air conditioning system for cooling various devices such as IT devices housed in a rack arranged in a computer room.

Various IT devices such as OA devices, electronic computers, and communication devices are used in a highly integrated manner, and high-temperature exhaust heat from the devices is collected and discharged, so that there is a tendency to increase heat generation. Since the operating temperature of these devices is set to be relatively low, if high-temperature exhaust air is inhaled, there is a possibility of causing problems such as system stoppage or device failure.
For this reason, these devices are housed in a multi-stage rack installed in the computer room, and a system is adopted in which cold air is efficiently sent to the devices in the rack by blowing from the double floor. In the case of a double floor blowout computer room, racks equipped with a large number of IT equipment can be broadly divided into a method of supplying cool air from the front and exhausting it to the back and top, and a method of supplying air from the bottom and the back. Two types of exhaust are used.

  Patent Document 1 discloses an example of a computer room air conditioning system that supplies air from the front. This computer room air conditioning system includes a rack and an air conditioner that are arranged opposite to each other across a passage. A shield unit that covers between the racks on both sides and shields the passage is disposed on the passage. The shield unit extends from the top of the rack on both sides of the passage and the ceiling shield that is passed to the upper part of the passage. It is comprised by the side part shield connected with the part shield, and the edge part shield provided in the edge part side of a channel | path.

  And in the edge part shield 60, as shown in FIG. 9, the inside of the channel | path 61 and the outer side of the channel | path 61 are partitioned off. In the end shield 60, the upper part of the frame is shielded by the panel part, and a blind part 62 that can be opened and closed is provided at the lower part. The blind part 62 shown in FIGS. 9 and 10 has a louver shape, and rod-like support parts 63 are arranged at predetermined intervals in the height direction, and each support part 63 is a fixed part constituting the side part of the frame body. It is supported by the member. A belt-like slat 64 is supported by each support 63 so as to be openable and closable, and the lower end of the slat 64 is shielded by coming into contact with the lower support 63.

  By the way, in the normal use state of the computer room, the air cooled by the air conditioner is blown into the internal space of the double floor surface and blown out from the perforated panel on the floor surface to the upper passage 61. The cooling / cooling air sent to the passage 61 is sent from the air supply port on the front surface of the rack to each device in the rack, and becomes hot air by heat exchange action with each device. And the hot air discharged | emitted from the upper surface or back surface of the rack is attracted | sucked by the air conditioning apparatus, is cooled again, is sent to the internal space of a double floor surface, and is circulated.

Here, in FIG. 9, when the flow rate of the cooling air supplied into the passage 61 is larger than the flow rate of the hot air sucked into the air conditioner from the outside of the passage 61, the inside of the passage 61 has a higher pressure than the outside. Thus, in order to maintain the positive pressure in the passage 61, the vane plate 64 of the blind portion 62 is maintained in a closed state.
In the computer room, an inert gas supply device for blowing an inert gas such as nitrogen gas at a high pressure is provided as a fire extinguishing facility. When the inert gas supply device is activated, the inert gas is jetted from the ceiling or the like to the outside of the passage 61, and the computer room becomes a high pressure. Therefore, as shown in FIG. Since the high-pressure inert gas escapes into the passage 61, the pressure imbalance between the inside and outside of the blind portion 62 is adjusted.

JP 2010-26872 A

  However, in the computer room air conditioning system described above, the flow rate of the cooling air discharged into the passage 61 is greater than the amount of external hot air sucked by the air conditioner due to, for example, a failure of the air conditioner. Is significantly increased, the shielding unit and the member supporting the shielding unit are peeled off from the upper surface of the rack, so that the shielding unit is deformed or broken. Moreover, since the cooling air in the passage 61 leaks out of the passage 61 due to this, there is a drawback that the function as the air conditioning system cannot be sufficiently exhibited.

  Further, even in an air conditioning system configured to supply hot air discharged from each device of the rack into the passage 61 closed by the shield unit and guide it to the air conditioner, the flow rate of air discharged into the passage 61 is Even when the flow rate of the cooling air supplied into the computer room is larger, the pressure in the passage 61 becomes excessive and has the same drawback.

  The present invention has been made in view of such a problem, and even when the pressure inside the passage space partitioned by the upper shield is excessively larger than the pressure outside the passage space, the upper shield. And an air conditioning system for a computer room in which the pressure difference between the cooling air and the hot air can be properly maintained by preventing the support member from being peeled off or damaged from the upper surface of the rack. And

  The computer room air-conditioning system according to the present invention is provided on both sides of a passage, and is provided with an equipment housing rack group for supplying cooling air from an air supply surface and exhausting hot air heated from an exhaust surface; The cooling air blown out from the air conditioner circulates through the internal space under the floor and is blown out onto the floor through holes provided in the floor surface, and this cooling air is supplied to the rack group through the air supply surface. In the computer room air conditioning system, after cooling the housed equipment, it is exhausted as hot air to the exhaust surface of the rack group and sucked back into the air conditioner, on both sides of the passage through which the cooling air or hot air flows An upper shield disposed between the upper surfaces of the rack group and an end shield provided at an end of the passage, and the passage space is partitioned by the upper shield and the end shield, and the upper shield Body and edge shield A vent part that can be opened and closed is provided at least in part. The vent part has a parent blade that can be opened and closed in one direction, a child blade that can be opened and closed in the other direction with respect to an opening formed in the parent blade, and An urging member for urging the child blade in the closing direction of the opening is provided.

According to the present invention, a vent that can be opened and closed is provided in at least a part of the upper shield and the end shield, and when the differential pressure between the inside and outside of the passage space is excessively larger than a predetermined value, When the child blades are opened, the child blades are opened against the urging force of the urging member of the ventilation section to prevent the upper shield from being peeled off or damaged, and when the parent blades are opened. The main blade is opened together with the child blade.
When cooling air is supplied to the passage where the upper shield and the end shield are installed, the cooling air supply surface of the rack group is the front surface, and the hot air exhaust surfaces are the upper surface and the rear surface. Preferably, the hot air is exhausted into the passage. When the hot air is exhausted into the passage, the cooling air supply surface of the rack group is at least one of the front surface and the upper surface of the rack group, and the hot air exhaust surface is The back surface is preferred.

The upper shield may include a side wall portion that extends upward from the upper surface of the rack and a top plate portion that passes over the side wall portion and covers the passage, and the ventilation portion is provided at least on the side wall portion. Is preferred.
By providing a ventilation part in the side wall part of the upper shield, the opening and closing operation of the main blade and the child blade is facilitated.

Further, the urging member is a spring member, and the child blade is opened when the pressure difference between the pressure inside the passage space and the pressure outside the passage space exceeds a predetermined value.
The urging member is a mainspring spring, and the child blade is opened when the pressure difference between the pressure inside the passage space and the pressure outside the passage space exceeds a predetermined value.
By opening the child blades of the ventilation part and discharging the gas on the high pressure side to the low pressure side, the differential pressure between the pressure inside the passage space and the pressure outside the passage space is made smaller than a predetermined value, It is possible to prevent the upper shielding member and the like from being peeled off.

Further, it is preferable that the main blade can be turned inside the passage space and the child blade can be turned outside the passage space.
When the pressure difference between the inside and outside of the passage space becomes excessive above a predetermined value, the child blade is opened against the urging force of the urging member of the ventilation section when the inside of the passage space is at a high pressure, and the passage Excessive pressure inside the space is guided outside to reduce the differential pressure below a predetermined value, and peeling or breakage of the upper shield can be prevented. In addition, when the outside of the passage space is at a high pressure, the main blade is opened integrally with the child blade, and excessive pressure outside the passage space is induced to reduce the differential pressure.

  In addition, the ventilation portion is preferably configured by arranging one or a plurality of support portions provided in the horizontal direction and parent blades provided on the support portion so as to be openable and closable and having child blades.

According to the computer room air conditioning system of the present invention, when the differential pressure between the pressure inside the passage space and the pressure outside the passage space is excessively large with respect to the upper shield and the end shield that separate the inside and outside of the passage space. However, by opening the main blade or the child blade of the ventilation portion according to the differential pressure and allowing the high-pressure side gas to flow to the low-pressure side, it is possible to maintain an appropriate air-conditioned state by one mechanism. Moreover, it is possible to prevent the upper shield and its supporting member from being peeled off or damaged.
In addition, according to the present invention, the pressure difference between the inside and outside can be adjusted by at least one of the ventilation portion of the upper shielding body and the end shielding body that partitions the passage space even if there is no power. It is.

It is a perspective view which shows the outline | summary of the computer room air conditioning system by 1st embodiment of this invention. It is a disassembled perspective view which shows the upper shielding body of the computer room air conditioning system shown in FIG. It is a figure which shows the 1st ventilation part with which the upper shielding body shown in FIG. 2 was equipped, (a) is a side view, (b) is a perspective view which shows the single blade | wing part which has a main blade board and a child blade board. is there. It is a principal part perspective view which shows the edge part shield body of a computer room air conditioning system. It is a figure which shows the open state of the main blade | wing of the blade | wing part shown in FIG. It is a figure which shows the open state of the child blade | wing of the blade | wing part shown in FIG. It is explanatory drawing of the blade | wing part by 2nd embodiment. It is explanatory drawing which shows the modification of a ventilation part. It is a figure which shows the closed state of the conventional blind part. It is a figure which shows the open state of the conventional blind part.

Hereinafter, a computer room air conditioning system according to an embodiment of the present invention will be described with reference to the accompanying drawings.
1 to 6 show a computer room air conditioning system 100 according to a first embodiment of the present invention. As shown in FIG. 1, the computer room air conditioning system 100 according to the present embodiment is used in a computer room 101 formed in a substantially box shape, for example. The computer room 101 is surrounded by the floor 1, a wall and a ceiling (not shown). A double floor 2 is provided so as to be spaced upward from the floor 1, and a plurality of racks 3, 3,... A passage 4 is disposed on the double floor 2 sandwiched between these two rows of racks 3. An internal space 5 is provided under the double floor 2, and the internal wiring 5 accommodates the electrical wiring of each rack 3, the electrical wiring of an air conditioner 6 described later, and the like.

A large number of long holes 8 are formed on the passage 4 extending in the longitudinal direction of the double floor 2, and a rectangular plate-like hole covering the long holes 8 is formed on the entire periphery of the edge of the long holes 8. A panel 7 is provided. The internal space 5 and the passage 4 under the floor communicate with each other through the plurality of holes so as to allow ventilation.
An air conditioner 6 is installed on the double floor 2 outside the passage 4. In the air conditioner 6, the hot air exhausted from the rack 3 is sucked from the suction port 6a and cooled, and the air cooled in the air conditioner 6 is used as cooling air from the air outlet 6b provided on the bottom surface. 5 is sent out.

Cooling air supplied from the air conditioner 6 to the internal space 5 is supplied onto the passage 4 through the perforated panel 7. Each rack 3 is formed in a box shape, takes cooling air from an air supply surface 3b formed on the entire front surface of the housing 3a, cools IT equipment such as a personal computer and communication equipment, absorbs heat, and so on. The hot air thus obtained is exhausted from the exhaust surface 3d provided with the fan 3c provided on the upper or rear surface.
In the computer room air conditioning system 100, for example, a substantially box-shaped upper shielding body 10 having no bottom is disposed between the upper surfaces of the racks 3 that are arranged to face each other with the passage 4 interposed therebetween. Is provided with a pair of end shields 11 covering the racks 3 on both sides, and the passage 4, the rack 3, the upper shield 10, and the end shield 11 constitute a passage space S of a closed space.

  As shown in FIG. 1 and FIG. 2, the upper shield 10 is, for example, four side walls 13 that stand upward from the upper surface of each rack 3, and is passed to the upper part of each side wall 13 to pass the passage 4. And a top plate portion 14 to be covered. The top plate portion 14 includes, for example, a roll screen 16 attached to the frame body 15, and the top screen portion 14 is pulled out and wound up from the accommodating portion 17 arranged at one end portion of the frame body 15. Although it can be opened and closed, it is closed in this embodiment.

Next, as shown in FIG. 2, each side wall portion 13 includes a frame body 30 and a first ventilation portion 31 attached to the frame body 30. The first ventilation portion 31 is provided in each frame divided into a plurality of horizontal directions by the frame body 30.
As shown in FIG. 3A, each first ventilation portion 31 includes a plurality of support portions 33 arranged at predetermined intervals in the vertical direction, a fixing member 34 that fixes the plurality of support portions 33 at predetermined intervals, A blade portion 35 is rotatably supported by the support portion 33 and can open and close an opening portion 33a between adjacent upper and lower support portions 33. Therefore, it can be said that the first ventilation part 31 has a rough shape.

Here, as shown in FIGS. 3A and 3B, the blade portion 35 has a main blade plate 36 formed in a square plate shape, for example. The lower part of the main vane plate 36 is bent or curved on the opposite side to the opening direction to form an abutting part 36a, and this abutting part 36a is another support adjacent to the lower side of the supporting part 33 that forms the center of rotation. By contacting the portion 33, the opening 33a between the upper and lower support portions 33, 33 can be closed.
An opening 36 b is formed in the main blade plate 36, and a child blade plate 37 that can open and close the opening 36 b is rotatable about the support portion 33 in the direction opposite to the main blade plate 36. For example, a leaf spring 38 is attached as an urging member between the child blade plate 37 and the parent blade plate 36, and the child blade plate 37 normally urges the opening 36b of the parent blade plate 36 in a closing direction. Has been.

When the pressure inside the passage space S is Pi and the pressure outside the passage space S is Po, if Pi is larger than Po, the main blade plate 36 is kept closed. When the pressure Pi inside the passage space S becomes an excessive differential pressure that is larger than the external pressure Po by a predetermined value Ps or more (Ps ≧ Pi−Po), the main blade plate 36 is in a closed state, The child blade plate 37 rotates against the urging force of the spring 38 to open the opening 36b. The opening degree of the opening 36b by the child blade plate 37 is set by the urging force of the leaf spring 38 and the magnitude of the differential pressure.
In FIG. 3 (b), the width of the main blade plate 36 is formed to be small, but actually, as shown in FIG. 2, the main blade plate 36 and the sub blade plate 37 are formed in a band shape with a wide lateral width. It shall be.

Further, as shown in FIG. 4, the end shield 11 is disposed so as to close the end of the passage 4, and includes a panel portion 41 that closes the opening of the frame 40, and a lower portion of the frame 40. And a second ventilation portion 42 provided in the housing.
The second ventilation portion 42 has the same configuration as the first ventilation portion 31 shown in FIG. 3 described above, and opens and closes the support portion 33, the fixing member 34, the main blade plate 36 having the opening 36b, and the opening 36b. A possible child blade plate 37 and a leaf spring 38 are provided, and the main blade plate 36 and the child blade plate 37 constitute a blade portion 35. Note that the second ventilation portion 42 can be formed in a space of an appropriate size in the end shield 11.

The computer room air-conditioning system 100 according to the present embodiment has the above-described configuration. Next, the operation will be described with reference to FIGS. 5 and 6. In the computer room 101, personal computers and communication devices housed in the rack 3. Etc. generate | occur | produces heat | fever, and those apparatuses heat up, Therefore It is necessary to cool each apparatus in operation. Therefore, in the computer room air conditioning system 100 shown in FIG. 1, the air conditioner 6 is driven to blow cooling air into the internal space 5 of the double floor 2 from the outlet 6 b on the lower surface. This cooling air is blown out from the plurality of holes of the perforated panel 7 to the upper passage 4 through the internal space 5.

  In the cooling air sent to the passage 4, the passage space S is partitioned by the rack 3 on both sides, the upper upper shield 10 on the both sides, and the end shields 11 on both ends of the passage 4. Air is supplied into the rack 3 from the air vent 3b. In the rack 3, each device is cooled by the cooling air, and the cooling air becomes hot air having a relatively high temperature by the heat exchange action. The hot air is blown out from the exhaust surface 3d on the upper surface or the rear surface of the rack 3.

  In the normal operating state of the computer room air conditioning system 100, the pressure Pi of the cooling air in the passage space S is slightly larger than the pressure Po outside the passage 4, and the differential pressure (Pi-Po) is a positive pressure and a predetermined value. Since it is less than Ps, in the first ventilation part 31 of the side wall part 13 of the upper shielding body 10 and the second ventilation part 42 of the end part shielding body 11, as shown in FIG. It is held in a closed state in contact with the support portion 33 on the side. Moreover, since the differential pressure (Pi-Po) is less than the predetermined value Ps, the biasing force of the leaf spring 38 is greater than the pressure Ps in the passage space S acting on the child blade plate 37. 37 is kept closed.

  And the hot air discharged | emitted from the exhaust surface 3d of the rack 3 flows through the upper space of the computer room 101, is suck | inhaled from the suction inlet 6a of the upper surface of the air conditioning apparatus 6, is cooled inside, and is again lower surface From the air outlet 6b. Thereby, the flow and temperature of the air in the computer room 101 are controlled, and the favorable operation state of each apparatus is maintained.

  The hot air blown out from the exhaust surface 3d on the upper surface or the rear surface of the rack 3 is returned to the passage 4 from above before being supplied to the air conditioner 6, and is supplied from the suction port 6a on the front surface of the rack 3. There is a risk of being supplied with air. However, in the present embodiment, the rack 3 includes the upper shield 10 disposed between the upper surfaces of the racks 3 on both sides of the passage 4 and the end shield 11 provided at the end of the passage 4. Since the passage space S is partitioned by the upper shield 10 and the end shield 11, the hot air discharged from the exhaust surface 3 d of the rack 3 is restricted from flowing into the passage space S. That is, the passage space S is filled with cooling air from the floor of the double floor 2 to the top plate portion 14 of the upper shield 10.

Further, the ceiling of the computer room 101 is provided with an inert gas supply device (not shown) for injecting an inert gas such as nitrogen gas at a high pressure as fire extinguishing equipment. When this inert gas supply device is operated for some reason, the inert gas is ejected into the computer room 101 and the pressure Po outside the passage space S increases.
In the present embodiment, in the first ventilation portion 31 provided in the side wall portion 30 of the upper shield 10, the external pressure Po in the passage space S is larger than the internal pressure Pi in the passage space S as shown in FIG. In this case, since the differential pressure (Pi−Po) becomes a negative pressure, the main blade plate 36 of the blade portion 35 is released from the support portion 33 integrally with the child blade plate 37. As a result, the inert gas outside the passage space S flows into the passage space S through the opening 33a, whereby the pressure inside and outside the passage space S can be adjusted.

By the way, when the air conditioner 6 or the like breaks down, the blowout of the cooling air discharged from the blowout port 6b and supplied from the perforated panel 7 of the double floor 2 into the passage 4 stops or the blowout amount. Is smaller than the required amount, the pressure Pi inside the passage space S may become a low pressure, for example, a negative pressure, with respect to the pressure Po outside the passage 4. In this case, there is a possibility that a low-strength portion of the upper shielding plate 10, the end shielding member 11, the rack 3 and the like forming the passage space S may be damaged.
Even in such a case, according to the present embodiment, in the first and second ventilation portions 31 and 42 provided in the side wall portion 13 and the end portion shielding body 11 of the upper shielding body 10, Due to the pressure difference (Pi−Po) between the inside and the outside, the main vane plate 36 is rotated integrally with the sub vane plate 37 around the support portion 33 toward the inside of the passage space S, and the first vent portion 31 and the The two ventilation parts 42 are opened. Then, the air outside the passage space S is introduced into the passage space S through the openings 33a of the first ventilation portion 31 and the second ventilation portion 42, and the low pressure or negative pressure state can be eliminated.

  Further, when the flow rate of the cooling air blown from the outlet 6b is larger than the hot air absorbed by the suction port 6a due to the failure of the air conditioner 6 or the like, the pressure Po outside the passage 4 is reduced. The pressure Pi inside the passage space S becomes excessively high, and the differential pressure may exceed the predetermined value Ps. In this case, since the pressure in the passage space S maintains a positive pressure, in the first ventilation portion 31 of the upper shielding plate 10 and the second ventilation portion 42 of the end shielding body 11, the parent blade plate 36 of the blade portion 35 is The passage 4 is closed by coming into contact with the lower support portion 33. In this case, there is a possibility that the upper shield 10 and the member that fixes the upper shield 10 to the rack 3 may be separated from the upper surface of the rack 3 due to the high pressure Pi in the passage space S.

On the other hand, according to the present embodiment, in the first and second ventilation portions 31 and 42 provided in the side wall portion 13 and the end portion shielding body 11 of the upper shielding body 10, as shown in FIG. Since the pressure difference (Pi−Po) between the inside and the outside of S is equal to or greater than a predetermined value Ps ≧ (Pi−Po), the child blade plate 37 that closes the opening 36b of the main blade plate 36 serves as the biasing force of the leaf spring 38. Acts as an opening. Then, the cooling air flows out of the passage space S through the opening 36b of the main vane plate 36, so that the differential pressure (Pi-Po) can be reduced to less than the predetermined value Ps.
As a result, the pressure Pi in the passage space S is reduced, so that the upper shield 10 and the member that fixes the upper shield 10 to the rack 3 are prevented from being peeled off from the rack 3, and various devices in the rack 3 are cooled by the cooling air. Cooling can be continued.

  In the computer room air conditioning system 100 according to the above-described embodiment, the roll screen 16 provided on the top plate portion 20 of the upper shield 10 is related to the change in the magnitude of the differential pressure Ps between the inside and outside of the passage space S. The occlusion state was maintained. However, in place of the roll screen 16 in the configuration of the top plate portion 20, the main blade plate 36 that can be opened and closed in accordance with the change in the differential pressure (Pi-Po), similarly to the first and second ventilation portions 31 and 42, A child blade plate 37 may be provided.

As described above, according to the computer room air conditioning system 100 according to the present embodiment, in the configuration in which the passage 4 is partitioned by the rack 3, the upper shield 10, and the end shield 11, the pressure Pi inside the passage space S is the passage. When the pressure difference outside the space S is equal to or greater than the pressure Po and less than the predetermined value S1, the main blade plate 36 is integrated with the sub blade plate 37 so as to open the openings 33a of the first and second ventilation portions 31 and 42. The hot air that has been closed and guided into the rack 3 to cool the equipment and exhausted can be returned to the inlet 6 a of the air conditioner 6.
When the pressure Po outside the passage space S is relatively excessive compared to the internal pressure Pi, the upper shield 10 is opened by opening the main blade plate 36 integrally with the sub blade plate 37. Can be prevented. The inert gas can be efficiently introduced into the passage space S even when an inert gas supply device is provided on the ceiling of the computer room 101 or the like.

In addition, when the pressure Pi in the passage space S is excessive and the differential pressure with respect to the pressure Po outside the passage space S is equal to or greater than the predetermined value S1, the main blade plate 36 is kept closed, and the child blade plate 37 Since the opening 36b is opened against the urging force of the leaf spring 38, the cooling air can be discharged to the outside of the passage 4 and the differential pressure between the pressure Pi and Po can be maintained within an appropriate range. Separation or breakage of the shield 10 or its supporting part can be prevented, and the function as an air conditioning system can be sufficiently exhibited.
In addition, by appropriately adjusting the biasing force of the spring member 38, the angle at which the child blade plate 37 opens the opening 36b can be adjusted, and the amount of air released to the outside of the passage space S can be adjusted.
In addition, according to the computer room air conditioning system 100 according to the present embodiment, the opening and closing of the main blade plate 36 and the sub blade plate 37 are adjusted by the differential pressure (Pi-Po) without using power as in the above-described prior art. Manufacturing costs and running costs are reduced.

In addition, the computer room air conditioning system 100 by this invention is not limited to the above-mentioned embodiment, As long as the summary of this invention is not changed, a suitable change, substitution, etc. can be employ | adopted. Hereinafter, although other embodiment and modification of this invention are described, it demonstrates using the same code | symbol for the member and component which are the same as that of embodiment mentioned above, or is similar.
For example, FIG. 7 is a view showing the first ventilation portion 31 of the side wall portion 13 of the upper shield 10 and the blade portion 35 of the second ventilation portion 42 of the end shield 11 according to the second embodiment of the present invention. In the embodiment, the mainspring spring 43 is disposed as an urging member of the child blade plate 37 that opens and closes the opening 36 b of the parent blade plate 36.

  The mainspring spring 43 is connected to a lower end portion of a child blade plate 37 rotatably supported by the support portion 33, and a belt-like shape wound around the shaft portion 45 in the housing portion 44. The other end of the spring plate 46 can be pulled out and connected to the main blade plate 36. In addition, the shaft portion 45 constitutes a tension adjusting portion that adjusts the number of turns of the spring plate 46 to adjust the magnitude of the tension of the spring plate 46.

When the pressure Pi in the passage space S is smaller than the predetermined value Ps with respect to the external pressure Po, the child blade plate 37 closes the opening 36b of the parent blade plate 36 by the biasing force of the spring plate 46. In the position. When the pressure Pi in the passage space S is excessive such that the differential pressure is greater than or equal to the predetermined value Ps with respect to the external pressure Po, the spring plate 46 of the mainspring spring 43 is pulled out and the child blade plate 37 is pulled out. However, the opening operation is performed according to the magnitude of the differential pressure, and the cooling air can be guided to the outside of the passage 4 from the opening 36b. Moreover, the spring plate 46 expands and contracts according to the pressure difference between the pressure Pi in the passage space S and the external pressure Po, so that the child blade plate 37 can be opened and closed as necessary.
According to the computer room air conditioning system 100 according to the second embodiment, the passage space in which the child blade plate 37 starts the opening operation with respect to the parent blade plate 36 with the shaft portion 45 provided on the mainspring spring 43 as a tension adjusting portion. There is an advantage that the predetermined value Ps of the differential pressure between the pressure Pi in S and the external pressure Po can be arbitrarily adjusted.

  In the computer room air conditioning system 100 according to the above-described embodiment, the pressure Pi inside the passage space S is used to open and close the main blade plate 36 provided with the child blade plate 37 in the first ventilation portion 31 and the second ventilation portion 42. However, the opening and closing operation of the main blade plate 36 may be performed using power instead of such a configuration. In the modification shown in FIG. 8, the main blade 36 is controlled by a control unit 51 to which a pressure sensor 49 that detects the pressure Pi inside the passage space S and a pressure sensor 50 that detects the pressure Po outside the passage space S are connected. Is controlled electrically.

In the above-described embodiment, the second ventilation portion 42 is provided in a part of the side shield 11. Instead, the second ventilation portion 42 is provided in the entire side shield 11 instead. May be.
In the above-described embodiment, the child blade plate 37 is attached to be openable and closable around the support portion 33. However, the child blade plate 37 may be attached to the parent blade plate 36 to be openable and closable.

  In the computer room air conditioning system 100 according to the above-described embodiment, the passage 4 sandwiched between the plurality of racks 3 on both sides is partitioned by the upper shield 10 and the end shield 11 to cool the cooling air into the rack 3. Although it was made to supply, instead of this structure, as the computer room air conditioning system 100 according to the third embodiment, hot air having a high temperature is exhausted to another passage between the two rear surfaces of the opposite racks 3. You may do it. And the upper shielding body 10 by this embodiment is installed in the upper surface of the rack 3 of the both sides which pinches another channel | path through which hot air flows, and the edge part shielding body 11 is installed in the edge part of the channel | path 4. .

In this case, the cooling air flows into the passage 4 from the perforated panel 7 on the floor surface through the internal space 5, and is sent into the housing 3 a from the air supply surface 3 b on the front surface or the upper surface of the rack 3. The cooling air supplied into the housing 3a cools the heated IT equipment and the like, and is heat-exchanged to become hot air, which is partitioned by the upper shield 10 and the end shield 11 in the back direction of the rack 3. It is exhausted to another passage. And this warm air is suck | inhaled from the suction inlet 6a of the air conditioning apparatus 6, without mixing with cooling air, is cooled again, and is blown off from the blower outlet 6b as cooling air.
And the 1st ventilation part 31 can be provided in the side wall part 13 of the top shield 10, and the 2nd ventilation part 42 can be provided in the edge part shield 11. FIG.

3 rack 3b air supply surface 3d exhaust surface 4 passage 6 air conditioner 10 upper shield 11 end shield 13 side wall 31 first ventilation portion 33 support portion 35 blade portion 36 parent blade plate 36b opening 37 child blade plate 38 plate Spring 42 Second ventilation portion 43 Mainspring spring 45 Shaft portion 46 Spring plate 100 Computer room air conditioning system 101 Computer room

Claims (6)

The air conditioner comprises: a device housing rack group that is installed on both sides of the passage and that supplies cooling air from the air supply surface and exhausts hot air heated from the exhaust surface; and an air conditioner The cooling air blown out from the air flows through the internal space under the floor and is blown out onto the floor through holes provided in the floor surface, and the cooling air cools the equipment accommodated in the rack group through the air supply surface. Then, in the computer room air conditioning system, the hot air is exhausted to the exhaust surface of the rack group and sucked back into the air conditioner.
An upper shield disposed between the upper surfaces of the rack groups on both sides of the passage through which the cooling air or hot air flows, and an end shield provided at an end of the passage, the upper shield And the passage space is partitioned by an end shield,
A vent part that can be opened and closed is provided in at least a part of the upper shield and the end shield. The vent part has a main blade that can be opened and closed in one direction, and an opening formed in the main blade. A computer room air-conditioning system comprising: a child blade that can be opened and closed in a direction; and a biasing member that biases the child blade in a closing direction of the opening.   2. The computer room air conditioning system according to claim 1, wherein the upper shield includes a side wall portion extending upward from an upper surface of the rack and a top plate portion that is passed to an upper portion of the side wall portion and covers the passage.   The urging member is a spring member, and the child blade is opened when a pressure difference between the pressure inside the passage space and the pressure outside the passage space exceeds a predetermined value. The computer room air conditioning system described.   The urging member is a mainspring spring, and when the pressure difference between the pressure inside the passage space and the pressure outside the passage space exceeds a predetermined value, the child blade is opened. The computer room air conditioning system described.   5. The computer air conditioning system according to claim 1, wherein the main blade is rotatable to the inside of the passage space, and the child blade is rotatable to the outside of the passage space. 6.   The said ventilation | gas_flowing part is comprised from the support part provided in the horizontal direction, and the main blade | wing provided in this support part so that opening and closing was possible, and provided with the said child blade was comprised. 5. The computer room air conditioning system described in any one of 5 above.

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