Classifications

• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K7/00—Constructional details common to different types of electric apparatus
  • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
  • H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
  • H05K7/20718—Forced ventilation of a gaseous coolant
  • H05K7/20745—Forced ventilation of a gaseous coolant within rooms for removing heat from cabinets, e.g. by air conditioning device

Definitions

• the invention relates to a refrigerator with a receiving area in which a heat exchanger and at least one fan unit are arranged, wherein the fan unit is a radial fan or has such a, and wherein the radial fan generates an air flow with a main flow direction through the heat exchanger.
• a known from WO 2009/141610 A1 cooling device is used for cooling of electronic components that are housed in racks or cabinets.
• the cooling unit is integrated in a series of racks or control cabinets that delimit a cold aisle from a warm aisle in a data center.
• the cooling unit takes in heated air from the aisle, cools it and then releases it into the cold aisle.
• In the air conditioner fans are installed to generate an air flow, which suck the air to be cooled.
• the cooled air is blown out to the side so that it is blown past the front sides of the adjacent control cabinets or racks.
• a further cooling device which can be used in a data center in a series of racks.
• the cooling unit has fans installed in the front area, which suck the air to be conditioned back into the air conditioning unit and blow out the air at the front.
• plug-in housing are housed in a support frame, wherein the plug-in housing, the components of an air conditioning device, in particular a heat exchanger and a fan record.
• This object is achieved in that the radial fan of the cooling device is arranged in the flow direction behind the heat exchanger, and that the axis of rotation of the radial fan is at an angle ⁇ 90 ° to the main flow direction.
• the radial fan is arranged in flow straightener behind the heat exchanger, it is conditioned by the already cooled air flow and on a permissible operating temperature. As a result, on the one hand ensures the power stability of the radial fan and on the other hand a long life is achieved without additional construction.
• the radial fan is employed with respect to its axis of rotation at an angle ⁇ 90 ° to the main flow direction.
• the inclination of the radial fan also has the advantage that with a corresponding arrangement of a blowout the cooled air can be ejected through the front of the air conditioner, so that there is an ideal air flow path in the cold aisle.
• the axis of rotation of the radial fan in the angular range between 20 ° to 70 °, particularly preferably 30 ° to 60 °, employed to the main flow direction. In this angular range, only small flow losses result due to the non-ideal paraxial flow of the radial fan.
• two or more fan units are arranged one above the other, and that the axes of rotation of the radial fans of adjacent fan units are at an angle to each other.
• the radial fans are arranged folded against each other, so they suck on the one hand, the air also offset and above all the air ejected offset. This allows a particularly uniform action on the cold aisle with cooled air.
• the fan unit has a transverse width extending transversely to the axis of rotation of the radial fan, which is greater than the clear installation dimension of an installation opening formed on the front. So fan units are installed, which are larger in terms of their radial fan diameter than the width of the mounting hole and thus allow for low housing width maximum fan power.
• extending in the direction of the receiving chamber depth installation depth of the fan unit is less than the clear opening dimension of the mounting hole.
• the fan unit can then be rotated in the receiving space so that it can be moved out of the installation opening via the side depicting the installation depth. Then the fan unit can be easily removed, for example, for maintenance purposes, or it can be a new fan unit easy to install.
• the heat exchanger extends in the vertical direction of the receiving space, and all radial fans promote air through this heat exchanger, so a high cooling capacity is possible. If a radial fan fails, a redundancy is created with the remaining radial fans.
• An inventive cooling device may be such that it has a support frame, in which the front-side mounting opening is bounded by two mutually parallel spaced apart vertical frame profiles.
• the support frame forms a stable receptacle for the individual components of the refrigerator and the spacing the front vertical frame profiles a mounting hole is created by the maintenance of the fan units is possible when installed.
• An inventive cooling device may be characterized in that the fan unit is associated with a guide that leads to an offset of the fan unit in the depth direction. In this way, a simple assembly and disassembly of the fan unit can be made, the guide allows the insertion and removal of the fan unit reliable and easy to install.
• the front-side installation opening can be closed by means of a removable cover.
• the cover is perforated in particular, so that an air outflow through the front side is possible.
• an electrical control circuit may be arranged in the receiving space downstream of the heat exchanger in the direction of flow.
• the control circuit for example, the fan unit can be controlled. Because it is arranged in the flow direction behind the heat exchanger, it is cooled at the same time, so that no separate construction effort is required for this.
• FIG 2 is a detailed view of the cooling device according to Figure 1 in the front and in horizontal section.
• Figure 1 shows a refrigerator with a frame 10, which surrounds a receiving space.
• the frame 10 is composed of eight horizontal and four vertical frame profiles 1 1, 12, 13. In this case, two extending in the direction of the air conditioning depth horizontal frame profiles 1 1 and two extending in air conditioner width direction horizontal frame sections 12, a floor and a cover frame.
• the floor frame is connected to the cover frame via the four vertical frame profiles 13 in the corner regions of the frame 10.
• the receiving space can be closed at the front with a cover 14.1 and at the back with a cover 14.2.
• the covers 14.1, 14.2 are preferably hinged so that they form a door which makes the receiving space easily accessible.
• a holder 15 is stably fixed to the bottom frame and the two vertical frame profiles 13.
• the holder 15 carries a connection fitting 1 6, which forms both the flow and the return for a heat exchanger 20.
• the heat exchanger 20 is cuboid and designed as an air-water heat exchanger. It is supported with a bottom-side and a top-side attachment 21 relative to the frame 10. In this case, the heat exchanger 20 extends in the vertical direction almost over the entire height of the frame 10 in the running parallel to the horizontal frame profiles 12 frame frame width direction, the heat exchanger 20 also extends almost over the entire installation width of the receiving space.
• the heat exchanger 20 is designed as a conventional air-water heat exchanger, which forms air ducts between heat exchanger plates.
• the air ducts form a flow connection between the cover 14,2 facing Rear side of the heat exchanger 20 and the cover 14.1 facing the front side of the heat exchanger 20.
• the heat exchanger 20 is correspondingly in the main flow direction HS (see Figure 2) flows through with air.
• a mist eliminator 30 connects in the flow direction after the heat exchanger 20, a mist eliminator 30 connects. This is attached via brackets 31 to a condensate collector 40.
• the condensate collector 40 is designed as a trough which extends in the depth direction both over the heat exchanger 20 and via the mist eliminator 30.
• each fan receptacle has a bottom which forms a guide 65.
• the floor is fixed by means of fasteners 64 to the vertical frame profiles 12 stable.
• each fan mount a fan unit 60 can be used.
• six fan mounts are arranged vertically one above the other and all fan mounts are each occupied by a fan unit 60. It is also conceivable that not all fan shots are occupied.
• the area of the unoccupied fan mounts can then be used end walls, which prevent an air short circuit.
• the unused fan mounts are then bridged with the end walls and the occupied fan mounts are supported against each other. This results in a stable construction.
• FIG. 2 schematically illustrates a horizontal section through a fan unit 60 in the front region of the air conditioning unit.
• the fan units 60 are arranged in the assembled state behind the vertical frame profiles 13.
• the fan units 60 are mounted in the fan mounts on floors. shares that serve as a guide 65.
• the fan units 60 have a fan housing 61 with an exhaust opening 62.
• a radial fan 66 is housed in the fan housing 61.
• the radial fan 66 is preferably designed such that its conveying blades are curved counter to the direction of rotation of the radial fan 66, so it is a backward curved radial fan 66. This makes it possible to achieve a high power output for the purpose of high air volume delivery.
• the radial fan 66 has almost the same size as the fan housing 61 in the horizontal direction.
• the fan unit 60 has an installation depth T extending in the direction of the axis of rotation R of the radial fan 66 and a mounting width B extending in the horizontal direction perpendicular to the axis of rotation R.
• the installation width B is chosen to be greater than the clear opening dimension of the installation opening 18 between the vertical frame profiles 13.
• the installation width B can be selected to be greater than the total width of the refrigerator housing.
• the radial fan 66 is turned by the heat exchanger 20 with respect to its axis of rotation R at an angle ⁇ ⁇ 90 ° to the main flow direction HS.
• the blow-out opening 62 is offset relative to the front side by the installation dimension t and opposite to the side by the installation dimension b. This results between the front right vertical frame profile 13 and the right edge of the fan unit 60, a gap which, depending on its size, can be covered with a baffle to optimize the front blowout.
• the fan unit 60 is particularly preferably placed and arranged that it comes to rest with its exhaust opening 62 in the space between the two vertical frame sections 13. Then, an additional air baffle is not necessarily required, and the air can be deflected on the vertical frame profile 13 and output to the front.
• the fan motor 67 which drives the radial fan 66, is held in a space-saving manner behind the left-hand vertical frame profile 13 and in front of the fan housing 61.
• the axes of rotation R of the individual radial fans 66 are alternately set crosswise.
• the uppermost radial fan 66 according to FIG. 1 blows its air to the left side
• the radial fan 66 below it blows its air to the right side
• the then adjoining radial fan 66 returns its air to the left side.
• the front-side installation opening 18 can be covered with the cover 14.1 designed as a door. This is designed as access protection perforated, so that creates an air-conductive connection to the environment. Furthermore, the rear cover 14.2 is formed perforated so that air to be cooled through this cover 14.2 can be sucked through.
• the assembly of the individual fan units 60 succeeds easily. They are rotated so that they can be pushed with their installation depth T through the mounting hole 18 therethrough. A purposeful and simple assembly is achieved here by the fact that the fan units 60 can be pushed onto the guides 65. Behind the vertical frame profiles 13, the fan unit 60 can then optionally rotated in the intended position and then secured. In the cooling mode, the radial fans 66 suck in cooling air through the perforated rear cover 14.2 from an aisle. The air is then passed through the heat exchanger 20 and cooled by means of this.
• the heat exchanger 20 is presently designed as an air-water heat exchanger, which has spaced-apart heat exchanger plates, between which air ducts are formed.
• the air After passing the heat exchanger 20, the air is drawn through the mist eliminator 30. Any accumulating condensate is trapped in the droplet 30 and fed in the direction of gravity down to the condensate collector 40. Since the heat exchanger 20 is also set in the condensate collector 40, the condensate possibly arising on the heat exchanger 20 is caught in the condensate collector 40. Subsequently, the cooled air reaches the fan units 60 and is carried away by means of the radial fan 66 through the discharge opening 62 and ejected through the perforated front cover 14.1. The air then enters the cold aisle. It is available here for cooling purposes.
• the cooling device can be equipped with one or more fan units 60. With the number of fan units 60, the cooling capacity of the refrigerator increases. A user can thus select the number of fan units 60 depending on the desired performance data. If the required cooling capacity increases, then additional fan units 60 can be added.
• a redundancy can be covered by the number of fan units 60. For example, if three fan units 60 are sufficient for cooling, the user may insert a fourth fan unit 60 so that it receives an n + 1 redundancy.
• the operating costs can be reduced by the number of fan units 60 used. If, for example, three fan units 60 are sufficient to achieve the desired cooling capacity, then these fan units 60 run at maximum speed and thus with maximum energy consumption. For this reason, it is now possible to install further, for example, three further fan units 60 (ie up to a total of six fan units 60). As a result, the total air output per fan unit 60 decreases, whereby the energy consumption is reduced. This results in significant savings in operating costs and extended lifetimes.
• the cooling device has six identical fan mounts, in which identical fan units 60 can be used in a modular manner.
• the fan units 60 have an electrical connection, which enables activation of the fan units 60 in the plug-and-play method via the device software.
• an electrical control circuit 50 is integrated in the receiving space of the cooling device. This is arranged downstream of the heat exchanger 20 in the flow direction. It is thus cooled by the heat exchanger 20 and there are no other design measures required for this. Furthermore, a spatial separation between the rear water-conducting area and the electrical system is achieved by this arrangement of the heat exchanger 20. In addition, the electrical control circuit 50 is arranged for this purpose in the ceiling region of the frame 10.
• the cooling device has a width parallel to the front side, ie transverse to the air flow direction through the heat exchanger 20 (main flow direction HS) less than or equal to 300 mm. This corresponds to half the standard unit in common data centers.
• each fan unit 60 is designed such that it conveys an air volume flow in the range between 1 .000 m 3 and 1 .600 m 3 per hour.
• the water throughput through the heat exchanger 20 should be in the range between 90 and 1 60 l / min in order to obtain a sufficiently uniform utilization of the heat exchanger 20 in the width direction in this narrow width. This is particularly necessary when the receiving space of the refrigerator has a volume in the range of 0.6 to 0.8 m 3 .

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• Engineering & Computer Science (AREA)
• Computer Hardware Design (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Cooling Or The Like Of Electrical Apparatus (AREA)

Priority Applications (3)

Applications Claiming Priority (1)

Publications (1)

Family

ID=44625295

Family Applications (1)

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Cited By (2)

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Citations (5)

Family Cites Families (3)

• 2011
  • 2011-02-28 WO PCT/EP2011/052932 patent/WO2012116724A1/de active Application Filing
  • 2011-02-28 CN CN201180068698.5A patent/CN103609205B/zh not_active Expired - Fee Related
  • 2011-02-28 DE DE112011104973.0T patent/DE112011104973B4/de not_active Expired - Fee Related

Patent Citations (5)

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