DE102010051603A1 - Cooling system for cooling computer with e.g. computing unit in mini-intermediate text block-format, has heat accumulator coupled with waste heat producing electrical or electronic component group by heat bridge - Google Patents

Cooling system for cooling computer with e.g. computing unit in mini-intermediate text block-format, has heat accumulator coupled with waste heat producing electrical or electronic component group by heat bridge

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Publication number
DE102010051603A1
DE102010051603A1 DE201010051603 DE102010051603A DE102010051603A1 DE 102010051603 A1 DE102010051603 A1 DE 102010051603A1 DE 201010051603 DE201010051603 DE 201010051603 DE 102010051603 A DE102010051603 A DE 102010051603A DE 102010051603 A1 DE102010051603 A1 DE 102010051603A1
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DE
Germany
Prior art keywords
heat
cooling system
according
cooling
component group
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.)
Ceased
Application number
DE201010051603
Other languages
German (de)
Inventor
Thomas Endrullat
Thomas Lewin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LEWIN IND GmbH
LEWIN INDUSTRIES GmbH
Original Assignee
LEWIN IND GmbH
LEWIN INDUSTRIES GmbH
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 LEWIN IND GmbH, LEWIN INDUSTRIES GmbH filed Critical LEWIN IND GmbH
Priority to DE201010051603 priority Critical patent/DE102010051603A1/en
Publication of DE102010051603A1 publication Critical patent/DE102010051603A1/en
Application status is Ceased legal-status Critical

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    • 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D15/0233Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes the conduits having a particular shape, e.g. non-circular cross-section, annular
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D15/0266Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D15/0275Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00Details not covered by groups G06F3/00 – G06F13/00 and G06F21/00
    • G06F1/16Constructional details or arrangements
    • G06F1/20Cooling means

Abstract

The system (197) has an electrically operated primary cooling system (198), and a currentlessly operable emergency cooling system (199) including a heat accumulator (200) e.g. thermochemical heat accumulator, which is coupled with a waste heat producing electrical or electronic component group of a computer (100) by a heat bridge (204). The accumulator includes a fluid storage with predetermined volumes or a predetermined solid material volume. The accumulator is thermally coupled to the primary cooling system. Fluid lines of the primary cooling system are guided through the accumulator. An independent claim is also included for a method for cooling a computer with a with a waste heat producing component group.

Description

  • The invention relates to a cooling system for a computing device with at least one waste heat generating component group, wherein the cooling system comprises an electrically operated primary cooling system, and a computing device with such a cooling system.
  • Furthermore, the invention relates to a method for cooling a computing device with at least one waste heat-generating electronic component group, which is cooled when the power supply by electrically operated cooling system
  • In the prior art, for example, drawer-type drawers for rack systems are used as the component group carrier, which usually have the standard 19 "rack format. So-called racks, rack-mounted cabinets or computer housings (ATX / BTX format) form the support structures for the bays. These bays are usually in mainframe systems that have a variety of individual computers or computing units, cores or nodes, usually poorly accessible and surrounded by coolers or heat exchangers.
  • In these mainframes, the waste heat of all individual computers must be dissipated. The individual computers are mostly closely adjacent over and / or juxtaposed to save space. This arrangement provides high power density and requires very large and noisy ventilation systems. Given the current trend towards ever more powerful individual computers and the highest possible packing density of the individual computers, it can be foreseen that the previous cooling concepts with air cooling will reach their limits. The heat capacity of the air is not sufficient to dissipate the heat at a reasonable cost and tolerable noise pollution.
  • For example, the publication follows a concept for improving air cooling WO 06/055387 A1 , It describes a rack system for cooling of computer units, which are arranged in the form of Einplatinenrechnern (computer boards) floor-like with their flat top or bottom sides next to each other. Below the rack is a fan that blows cooling air through the floors. Between the floors grid pipe heat exchangers are arranged for intermediate cooling of the air.
  • The US 2009/025501 A1 deals with a rack-like rack system with standardized drawers, which are formed by supporting profile pairs arranged one above the other at a grid spacing. In the drawers are drawer-like housings for electronic component groups. At the rear of the housings, a number of fans are arranged, which suck cooling air out of the cabinet and out of the cabinet through a liquid-cooled heat exchanger behind the rear wall.
  • In addition to air cooling component groups in ventilated rack drawers, the US 2005/0068728 A1 a liquid cooling system before, which is flowed through by a cooling liquid heat sink directly connected thermally conductively connected to an electronic component. The cooling liquid is conveyed from a pump through a piping system to a flange mounted on an outer wall of the drawer for transferring the waste heat to a central cooling device.
  • The above-described concepts for intercooling or additional liquid cooling have the disadvantage that the cooling liquid comes in contact with the electronic components in case of leakage of the cooling system and can destroy or at least render it inoperable. Furthermore, direct liquid cooling is expensive.
  • In a departure from direct liquid cooling describes the US 2009/0262495 A1 a rack system for rack-mounted support structure component rack with 19 "standard rack format computing units. Electronic components of the computer units are contacted by rod-shaped heat sinks made of solid metal, which emerge from the housings and are flanged to the outside of a tube of a central cooling device. The disadvantage here is that the heatsink have high stray losses and emit a large part of the waste heat within the housing. They are also material-consuming to manufacture and severely limited in their absolute thermal conductivity.
  • The above-mentioned systems are in particular inadequate if, due to a power failure, the waste heat of the electronic component groups can no longer be removed, because the current-driven primary cooling system has failed. With mainframes or data centers with a large number of individual computers, a time span of several minutes usually elapses until an emergency power supply has started up and supplies energy. During this dead time, the still hot component groups must be further cooled. The same applies in case of failure of the cooling system. Here, the situation is exacerbated insofar as the component groups may still produce heat during operation. Especially with densely packed component groups threatens overheating and damage in these cases.
  • In view of these problems, the invention has the object, a cooling system for To create computing devices that prevents overheating of the component groups even in case of power failure or failure of the primary cooling system.
  • This object is achieved for the input cooling system according to the invention, characterized in that an electroless operable ausgestaltetes emergency cooling system is provided which has a coupled via a thermal bridge with the at least one group of components heat storage. For the aforementioned method, this object is achieved in that in case of power failure and / or failure of the cooling system, the waste heat is dissipated via at least one thermal bridge to a heat storage.
  • This simple solution ensures that even without power supply, the component groups are sufficiently cooled. The thermal bridge is an area that transfers heat faster than other areas. The thermal coupling of the heat accumulator with the at least one thermal bridge ensures that in case of power failure, the waste heat of the component groups is specifically delivered to the heat storage. The heat storage serves as a buffer which temporarily stores the waste heat.
  • The solution according to the invention can be combined as desired with the following mutually independent and individually advantageous embodiments and so further improved.
  • The heat accumulator can absorb the waste heat by providing a predetermined mass of material which is heated by the waste heat. For example, the heat accumulator may have a fluid reservoir of predetermined volume or a predetermined volume of solids.
  • In order to provide a heat accumulator with a particularly high heat capacity, however, according to a further embodiment it can be provided that the heat accumulator comprises a latent heat accumulator or a thermochemical heat accumulator. When latent heat storage, the storable energy is increased by a held during the storage process phase transition of the storage material from solid to liquid or liquid to gaseous. Thermochemical heat storage uses the enthalpy of reversible chemical reactions.
  • The heat capacity of the heat accumulator is preferably such that it corresponds at least to the amount of heat which is generated during operation by the computing device during a predetermined run-up time of an emergency power system connectable to the computing device. With this design, it is ensured that the computing device remains sufficiently cooled during the start-up phase of an emergency power supply. In a further embodiment, the heat capacity of the heat accumulator is at least dimensioned to temporarily store the amount of heat of the arithmetic unit accumulating within a time period between approximately 5 minutes and approximately 15 minutes.
  • The heat accumulator may be coupled in a further advantageous embodiment with the primary cooling system. This makes it possible to cool down the heat storage again after starting the heat supply.
  • According to a further embodiment, the heat accumulator can be a buffer store of the primary cooling system, in which a fluid, for example a cooling liquid, of the primary cooling system is accommodated.
  • In a further advantageous embodiment, the heat accumulator is part of the support structure of the computing device and / or integrated into the support structure. Thus, for example, a housing structure of the heat accumulator is used as the framework of the computing device in order to save space. For this purpose, the cooling system can also be integrated into a support structure which carries the component groups. The heat accumulator may be formed by the mass of the support structure, for example in the form of a solid wall. Alternatively or cumulatively, it can also detect a fluid reservoir that is integrated or suspended in the support structure.
  • In order to increase the amount of thermal energy transferable from the thermal bridge per time content and to minimize the leakage losses of the thermal energy on the way to the heat accumulator, the heat may at least comprise at least one currentless heat pump, preferably an evaporative heat sink. The heat pump may also be formed by a convection pump by heating a cooling fluid in lines of the primary cooling system due to the waste heat of the component groups and generating a convective flow in these lines which directs heated fluid toward the heat accumulator. The heat pump and / or the lines can at the same time be part of the primary cooling system.
  • According to a further embodiment, a plurality of component groups may be provided, which are connected via a further thermal bridge with a common cold wall, which is connected via the thermal bridge with the heat accumulator. Such a cold wall may comprise a hot area in which the component groups are arranged, from a cold area in which the waste heat of the component groups collected and discharged will disconnect. The heat storage is preferably arranged in the cold area.
  • In a further embodiment, the invention relates to a component group carrier for a computing device, to which at least one waste heat generating electronic component group of the computing device can be fastened by receiving the weight of the at least one electronic component group. In order to improve the cooling and ease of installation known component group carrier and support structures, the component group carrier is configured as a heat sink with a heat dissipation member and at least one heat receiving surface, which is equipped with the component group at least partially coupled thermally conductive.
  • The support structure for the at least one waste heat generating component group having computing device and the computing device with a plurality of individual computers, may comprise at least one component group carrier of the aforementioned type.
  • Thus, according to the invention, the component group carrier embodied as a heat sink fulfills a double function in that it simultaneously carries and cools the component group. Thus, a complicated assembly of the support structure and a separate heat sink on the component group as in the prior art unnecessary. These separate assembly steps are eliminated in accordance with the invention cooling component group carrier. Thanks to the invention, the cooling problem has already been solved by providing the support structure. The computing system is built up, so to speak, from the cooler.
  • Furthermore, it is advantageous in the solution according to the invention that the weight of the heat sink does not mechanically load the component group. The component groups are usually circuit boards, which, like the known, supported by the group of components heat sink, set and bent by the separate heat sink according to the prior art under mechanical stress, resulting in transports to conductor track breaks or to a drop of the can lead the heat sink connected component. This problem is remedied by the invention, because the cooling component group carrier carries the component group and the latter is thus essentially charged only by their low weight.
  • Thus, according to a first embodiment of a component group carrier according to the invention, it is possible for the at least one heat receiving surface to be configured directly and extensively on at least one electronic and / or electrical component of the component group, preferably directly. By a direct and surface contact between the heat receiving surface and the component group configured as a heat sink component group carrier can absorb and dissipate the waste heat particularly loss.
  • The heat sink may be designed as a supporting adapter by extending between fastening means for fastening the heat sink to a support structure of the computing device and attachment means for securing the at least one group of components on the heat sink. The fastening means can be designed according to the respective requirements.
  • According to a further embodiment of the component group carrier according to the invention can be provided that spacers are provided, which extend from a heat receiving region forming flat side of the component group carrier away to a distance from the flat side mounting plane. In the fastening plane, for example, a circuit board of the component group can be arranged, so that protruding from the board in the direction of the heat sink electronic components of the component group with the at least one heat receiving surface can be brought into contact with heat.
  • If the electronic components have different heights, it can simplify the assembly, if at least one heat receiving surface for thermally conductive contacting an electronic component of the component group protrudes from the component group carrier.
  • The component group can be mounted particularly easily on a component group carrier according to the invention if it is provided according to a further possible improvement of the component group carrier that a topography of the heat absorption area comprising at least one heat receiving area is at least partially complementary to a topography of the group of components. In this embodiment, for example, the positions and heights of the heat receiving surfaces are based on the position and height of the waste heat generating component. For this purpose, a plurality of heat receiving surfaces may be provided which project at different heights.
  • According to a further possible embodiment of a component group carrier according to the invention, its mounting on a support device and / or central heat removal device of a computing device can be simplified if it is provided that the heat removal device is designed as a flange. The component group carrier can then simply be flanged onto the support device of the computing device. Alternatively or additionally, the heat removal member may be configured as a rib heat sink and thus the Improve heat transfer from the heat removal member to a cooling medium. The cooling medium can be, for example, the ambient air, an air flow in a central heat removal device or another fluid.
  • The cooling of the component group carrier can be improved according to a further embodiment in that the heat dissipation member is designed to be permeable by a cooling medium.
  • The packing density can be increased when the heat dissipation member is on a narrow side of the heat sink and the heat receiving area on a flat side of the heat sink. In this embodiment, a flat heat sink is formed. The larger area heat absorption area can thus cover part of the component group in part and also absorb radiant heat. The heat dissipation from the narrow side allows low construction heights.
  • Furthermore, a main heat receiving direction, in which the waste heat of the component group is introduced into the component group carrier, extend substantially perpendicular to a main heat discharge direction, in which the waste heat is derived from the heat dissipation member. This embodiment requires a deflection of the heat flow, so that in the main heat receiving direction, which often corresponds to the orientation of the component group, a denser packing of successive component groups is possible.
  • The waste heat can be particularly easily transported from the heat receiving surface to the heat dissipation member, if according to another possible embodiment of the component group carrier is provided that a heat receiving area, which preferably has the heat receiving surface is connected via at least one heat pipe or heat pipe heat transfer to the heat dissipation member.
  • According to a further embodiment of the support structure mentioned above, the solution according to the invention can be improved in that the at least one component group is repeatedly detachably fastened to the support structure, which considerably improves the ease of assembly of the support structure.
  • According to a further possible embodiment, a cooling support structure according to the invention can be mounted particularly easily by supporting the heat sink between a mounting position on the support device for mounting the heat sink and fastening means of the component group. In this case, the heat dissipation can be further improved if a the heat dissipation member of the heat sink heat-conducting contacting heat dissipation line of a central cooling device for the computing device is integrated into the support means.
  • According to a further possible embodiment, the construction of the support structure or the computing device according to the invention can be further simplified by integrating a cooling system into the support device and connecting the component support to the support device in a thermally conductive manner and / or by removing the heat removal element into a region of the support element Cooling system sticks out. In one embodiment, the heat removal line can be integrated into the supporting device configured as a cooling wall and provided with a multiplicity of subgroups and / or superimposed component group receptacles for one of the cooling bodies.
  • A heating of the air around the computing device can be reduced in that at least one component group carrier, preferably a plurality of heat sinks, arranged in a warm area and the cooling device is arranged in a cold area, wherein the hot area and the cold area substantially exclusively by the respective heat dissipation of the Component group carrier or the heat sink are heat-transmitting coupled together. Thus, the waste heat is largely passed through the heat removal means, without the air in or around the computing device to heat. Preferably, the cold region is substantially hermetically separated from the hot region to enhance heat dissipation. In one embodiment, the component group carrier extends from the warm region into the cold region.
  • According to a further possible embodiment of the support structure according to the invention, a spatial power density of the computing device can be increased if the grid spacing of superposed mounting positions of two heat sinks corresponds to a maximum of one height unit (HE) of a standard rack format and / or a grid spacing of adjoining mounting positions of two heat sinks less than a standard rack width is. The support structure or support device may be provided, for example, with a plurality of arranged in a grid mounting positions for each at least one component group carrier.
  • In accordance with a further advantageous embodiment, the component group carrier is designed as a heat sink, preferably as an evaporative heat sink, with a fluid space arranged between the heat receiving surface and the heat removal element. The component group carrier can be designed, for example, as an evaporative cooling body and has a heat absorption area Evaporation wall and a condensation wall on opposite with respect to the fluid space flat sides. Since the condensation of the fluid vapor takes place primarily in the ceiling region of the fluid space, this configuration is advantageous, in particular in the case of a horizontally oriented evaporative cooling body. According to the invention, in this orientation, the heat sink releases the heat via the heat dissipation member in the horizontal direction.
  • The component group carrier may be configured with a main heat dissipation path connected to an evaporating heat sink at a flat side of the evaporative heat sink by a fluid space adjacent to the evaporation wall and fluid space via a condensation wall forming a cover of the fluid space to at least one heat conduction connected to the condensing wall Heat removal member runs. The heat dissipation member may be disposed on a narrow side of the collection subcarrier.
  • This embodiment has the advantage that contamination of the computer system is avoided by entrained with the cooling air particles. It also allows a more effective heat dissipation in the heat sink as an air or liquid cooling, because the waste heat is converted into enthalpy of vaporization of the fluid. At constant pressure in the fluid space, it is possible to cool the component to the constant boiling temperature of the fluid, as long as the evaporation wall is covered with liquid fluid.
  • The advantage of directed heat dissipation along the main heat removal path is that the waste heat will not be released to the air within the computer system, but can be selectively conveyed away from the component with little loss. The heat absorption via the evaporation wall on the flat side and the directional heat transfer via the narrow side of the heat sink allow a high packing density of the components. The heat sinks can be packed with their flat sides together. The flat side also shields heat radiation emanating from the component and its surroundings.
  • The evaporation heat sink according to the invention can be used in particular as a passive heat sink and thus requires no additional energy for active cooling of the computer system, for example by fans or pump-moving cooling media.
  • In order to facilitate the transport of heat in the direction of the heat removal member, a material cross-sectional area of the condensation wall may increase toward the heat removal member. The heat cross-sectional area is substantially perpendicular to the Hauptwärmeabfuhrweg. Along the increasing cross-section of the material, the condensation heat collected by the condensation wall, which is reflected in a heat flow increasing toward the heat-removal element, can be led to the heat-removal element with little heat resistance.
  • In order to facilitate the condensation of the fluid evaporating at the evaporation surface, it can be provided that the condensation wall is provided with condensation bodies projecting into the fluid space. This condensation body may be thermally conductively connected to the condensation wall or form part of the condensation wall. The condensation body cause an enlargement of the condensation wall and facilitate dripping.
  • During operation of the heat sink, a flow in the fluid space is formed due to the rising steam against the direction of gravity and the falling drops. In order to influence the flow and, for example, direct the vapor phase to certain points of the condensation wall, at which condensation is preferably to take place, flow control elements can be provided in the fluid space.
  • The function of the Strömungsleitorgane can be perceived by the condensation heat sinks, for example, by forming flow channels.
  • The condensation body may be configured substantially rib-shaped.
  • They can be substantially continuous to the heat removal device and form Wärmeleitbrücken, between which the condensation and flow of the vapor phase takes place. The heat conducting bridges can preferably be connected in a heat-conducting manner to the heat removal member in order to supply the condensation heat to the heat removal element in a targeted manner.
  • The height or cross-sectional area of the condensation bodies may increase in the direction of the main heat-removal direction in order to increasingly provide more material cross-sectional area for the heat transport. The condensation body can protrude increasingly at least in regions in the direction of the heat dissipation member more in the fluid space.
  • In order to direct the vaporized fluid along the main heat removal path in the direction of the heat removal member, according to a further embodiment of the invention, the height of the fluid space in the main heat dissipation direction, towards the heat dissipation device, increase. In this embodiment, the hot vapor phase flows independently into the highest part of the fluid space, where it condenses close to the heat dissipation member.
  • In order to ensure that those regions of the evaporation wall are always covered with liquid fluid, which are located directly above the component, it can be provided that the evaporation wall forms at least one fluid collection depression. The fluid collecting depression forms a depression in which liquid fluid collects and ensures heat dissipation.
  • The heat coupling of the evaporation wall to the electronic component can be ensured in a simple manner by the fact that the evaporation wall projects at at least one point on the flat side of the evaporation cooling body facing the component or facing away from the fluid space. Due to the at least one projection heights of different components can be compensated. The projection has a preferably planar heat receiving surface, which can be brought into contact with the component in a flat and airless manner.
  • The heat absorption surface may be formed by the fluid collection depression, so that the fluid collection depression is heated directly by the component to be cooled. The wall thickness of the evaporation wall may remain substantially constant in the region around and around the fluid collection depression. In the area of the projection no higher material usage is necessary. Alternatively, the wall thickness in the area of the fluid collection well can be reduced in order to enable a more rapid and more efficient transport of heat into the fluid space.
  • According to a further embodiment of the evaporative heat sink according to the invention, this can be used for (multi-point) cooling of several, advantageously all components of an electronic component group to be cooled. For this purpose, the evaporation wall can form a plurality of spaced-apart, projecting heat receiving surfaces. The heat receiving surfaces can protrude differently far, so that their positions and preferably also heights correspond to the positions and heights of the components on the component group or board. The air inside the computer system heats up less. If individual components can not be contacted directly in a heat-conducting manner, the heat absorption surface can be provided with ribs in relation to the associated component in order to receive and forward the waste heat of this component convectively and by heat radiation transmission.
  • The directed heat dissipation along the main heat removal path can be improved according to another embodiment by using a side wall of the fluid space on the narrow side where the heat dissipation member is located, in addition to condensing the fluid. This is particularly useful when the heat dissipation member is strongly cooled. The condensation will then take place increasingly in the regions of the fluid space lying close to the heat removal element. In order to positively influence the condensation, the side wall may be provided with the features of the condensation wall in one of the embodiments described above.
  • In order to reduce a boiling delay, loose boiling bodies, for example boiling stones, glass beads and / or preferably aluminum semolina, may be introduced into the fluid space.
  • The function of the evaporative cooling body can be improved in a further advantageous embodiment in that the fluid space designed pressure-tight and filled with a liquid phase, which preferably covers at least one evaporation surface, and a vapor phase of a fluid. The amount of fluid can already be optimally sized in the case of a sealed fluid space by the manufacturer of the evaporative heat sink, which increases the ease of maintenance. For this purpose, a squeezed off pipe socket, preferably pressed from copper, soldered or otherwise introduced sealingly.
  • Alternatively, the pipe socket can also be closed by a valve or a cock refillable.
  • As the fluid, a non-flammable, non-corrosive and non-electrically conductive coolant may be used, which may be CO 2 , a low-boiling solvent because alcohol or ether, CFK, CHC, HFC or CFC. A boiling point of the fluid may be from about 0.5 to about 2.5 bar, preferably about 40 ° to about 50 ° C, at an internal pressure in the fluid space. Most preferably, the boiling point of the fluid may be between about 30 ° to about 40 ° C or even below about 30 ° C. The fluid volume volume may be less than about 500 ml, less than about 250 ml or less than about 150 ml, or in some cases less than about 50 ml. In the fluid space, a volume of liquid fluid of, for example, about 5 to about 200 ml, preferably less than about 100 ml or less than about 50 ml may be included.
  • In the fluid space, a filling or displacement body may be arranged, so that between the evaporation wall and the filling body and / or the condensation wall and the packing of the Fluid space extends gap-shaped. The packing reduces the fluid volume and thus the amount of fluid necessary to cover the evaporation wall. The filler is preferably connected to the side wall located at the heat removal member and additionally dissipates heat. Its material cross section may increase towards the heat dissipation member.
  • The output of waste heat within the computer system can be further prevented that the flat side opposite the heat receiving surface and / or not adjacent to the heat dissipation member side wall of the heat sink are at least partially outside provided with a thermal insulation or is. The thermal insulation can for example use a sprayed or glued foam and / or plastic. Also, the thermal insulation can be configured as a prefabricated molded part, which is placed, for example, in the installed state of the heat sink to the heat sink.
  • The evaporative heat sink according to the invention can advantageously be used in computing devices with small dimensions or mainframes with a large number of densely packed computing units, if the overall height of the component group carrier is smaller than a height unit (HE) of a standard rack format. For example, a height unit (HE) can be 1% inches or 44.45 mm. Most preferably, the height of the evaporative heat sink together with an electronic component group connected to the heat sink in a heat-conducting manner is less than 44.45 mm. A measured in a height direction in the direction transverse to the component group or board height of the heat sink is at least partially below 35 mm, at least in the heat receiving area. In this embodiment, the packing density compared to conventional computer systems can be increased by a factor of about 7.5, without problems in the heat dissipation occur.
  • In order to cool additional electrical or electronic components, such as peripherals or accessories of the computing device, mass storage in the form of hard disks, solid state memory or another group of components using the evaporation heat sink according to the invention, on the opposite side of the evaporation wall flat on the outside a receptacle for mounting and thermally conductive contacting additional components be provided. In this embodiment, in each case an evaporation wall can be provided in one of the above embodiments on the two opposite flat sides. This refinement can be of advantage in particular in the case of a vertical orientation of the evaporative cooling body.
  • Furthermore, mounting options for Rechenknotenkabel and other accessories may be provided on the heat sink. The heat sink can in particular be structurally combined with at least one plug connector and / or at least one data or power supply line, so that the component group can be connected to the heat sink without additional cables. In particular, the heat sink may be provided with at least one ground contact.
  • The heat sink may comprise a metallic or metallized shell, in which the at least one electrical or electronic component is receivable. The sheath may be connected to the ground contact for improved EMC compatibility.
  • Furthermore, the heat sink can be provided with fastening elements for fastening the component and / or for mounting the heat sink to a support structure of the computing device. Also, the heat sink itself can form a support structure of the computing device by being provided with attachment means to which a component group can be attached, so that it is carried by the heat sink as part of the support structure.
  • By means of at least one additionally introduced heat pipe, the heat transport performance can be modified locally and with respect to the operating range. The operating point of the at least one heat pipe can be above or below the boiling temperature or the operating point of the evaporative cooler, so that the heat pipe works optimally in one area and supports the evaporative cooler in which it is not or no longer efficient. By such an operating point cascaded arrangement, the range of application of the heat sink can be extended. The at least one heat pipe can be integrated in the bottom, in the fluid space in addition to or instead of the filler or in the outside attached to the heat sink ribs.
  • To expand the operating range, for example, two different heat pipes can be provided, which have their respective optimum operating point in the lower or upper temperature range. A heat pipe, for example, be designed so that it dissipates heat to the heat removal device at an operating temperature of 20 ° C, but collapsed at an operating temperature of 45 ° C, while the fluid in the fluid chamber, for example at 45 ° C and boiling, at higher temperatures of the other heat pipe is supported with an optimal operating point at 70 ° C. Especially at high temperatures, the cooling capacity may be reduced due to reduced condensation of the fluid in the fluid space.
  • The operating point cascaded arrangement of several cooling systems integrated in the heat sink allows high cooling capacities over a wide temperature range with simultaneously increased reliability.
  • The evaporative cooling body can preferably have a thin wall thickness, in particular in the region of the components to be cooled, and be made of a metallic, highly thermally conductive material, such as, for example, aluminum and / or copper. In particular, the heat sink can be produced cost-effectively if it is configured, at least in sections, as a molded part producible in a strand and / or die casting process. It can be composed of several shells or individual parts and laser-welded, for example.
  • To improve the heat dissipation, the side wall, the floor, the ceiling, the evaporation wall and / or the condensation wall can be integrally connected to one another or integrally formed.
  • In the following the invention with reference to several embodiments with reference to the accompanying drawings is explained in more detail by way of example. The embodiments merely represent possible embodiments in which individual features, as described above, can be implemented independently of each other and omitted. In the description of the embodiments, the same features and elements are provided with the same reference numerals for the sake of simplicity.
  • Show it:
  • 1 a schematic perspective view of a first embodiment of a computer system according to the invention with a plurality of heat sink according to the invention;
  • 2 a schematic perspective view of an embodiment of a designed as a heat dissipation line support according to the invention of a computer system;
  • 3 a schematic perspective view of a heat sink according to the invention;
  • 4 a schematic exploded view of a heat sink according to the invention, including an electronic component group and an electronic auxiliary device;
  • 5 a schematic perspective view of the in 4 shown heat sink, the component group and the accessory in an assembled state;
  • 6 a schematic perspective view of a lower part of a heat sink according to the invention;
  • 7 a schematic perspective sectional view through an upper part and the in 6 shown lower part of an evaporative heat sink according to the invention along the main heat dissipation direction of the heat sink;
  • 8th a schematic perspective sectional view through side walls of a heat sink according to the invention in the direction of a main heat dissipation direction of the heat sink;
  • 9 a schematic perspective view of a computer system according to the invention with a plurality of inventive heat sinks;
  • 10 a schematic side view of another embodiment of a heat sink according to the invention, as in the computer system of 9 can be installed;
  • 11 a schematic perspective view of the embodiment of the 10 ;
  • 12 a schematic sectional view taken along the line XII of 11 ;
  • 13 a further embodiment of a computer system according to the invention in a schematic perspective view;
  • 14a -I schematic representations of concepts for guiding a cooling medium in evaporative cooling bodies according to the invention.
  • First, based on the 1 a computing device according to the invention 100 described. The computing device 100 is modular, for example, two sub-modules 100a and 100b , which may be arranged back to back and / or side by side. A common preferably wall-shaped support means 101 , or in each case a preferably wall-shaped support means 101 respectively. 101 a sub-module, is part of the supporting framework of the computing device 100 forming support structure 102 ,
  • In the support device 101 is a central cooling device of the computing device 100 integrated so that they have a cold wall 103 forms, which can be traversed by a cooling medium such as a cooling liquid or cooling air. The cold wall 103 preferably separates hermetically a central, cooled or cooled designed cold area K of the computing device 100 from a warm area W, in the waste heat by electronic and / or electrical component groups 104 or Components is generated. The cold zone K is cooled by a central cooling system.
  • The central cooling device or the cooling system 197 the computing device has a primary cooling system 198 on which works under power and includes, for example, pumps or fans. A de-energized emergency cooling system 199 is with the component groups 104 connected via at least one thermal bridge and can, for example, the mass of the cold wall 103 as a heat storage 200 use. During operation, the heat accumulator is cooled by the primary cooling system. If the cooling system fails, it heats up and absorbs the waste heat of the component groups. Instead of or in addition to the mass of the cold wall 103 can also be a separate mass of a material with high heat capacity integrated into the cold wall. Also, a tank with a cooling fluid, a thermochemical heat storage and / or a latent heat storage can be arranged in the cold wall. The lines in the cold wall are passed through the heat storage or at least at this. The conduits / and the fluid contained therein may be part of the thermal bridge from the component groups to the heat accumulator.
  • In 1 are as component groups 104 Single computer shown from which the computing device 100 or the submodules 100a . 100b are constructed. Warm area W accesses the component groups 104 by maintenance personnel.
  • The transport of the waste heat from the warm area W to the cold area K is carried out by component group carriers 1 , at the same time as a heat sink 1a serve. The heat sinks 1a are preferred as evaporation heat sink 1a but may also include heatpipes. The component group carriers 1 are part of the support structure 102 the computing device 100 and carry the component groups 104 or individual components. The heat is from the respective component group 104 over one of the component group 104 facing heat absorption area 104 ' in the heat sink 1a or component group carrier 1 directed.
  • Thus, preferably, the cooling function of the computing device 100 in the entire support structure 102 integrated. The electrical components and component groups 104 group around this supporting and cooling structure 102 around. The coupling of the heat sink 1a with the cold zone K via a heat dissipation member 2 , the heat-conducting with the support means 101 connected is.
  • The heat sinks 1a are about fasteners 3 at the support device 101 fastened with complementary fasteners 105 the support device 101 are connected. As a fastener 3 . 105 come screw or locking connections and positive, cohesive or non-positive, such as magnetic brackets into consideration. The heat sinks 1a have more fasteners 4 at which the component groups 104 are attached.
  • The electronic component groups 104 are preferably in a grid, for example in a lateral direction X of the computing device 100 in a side grid spacing x next to each other, in a transverse direction Y of the computing device 100 in a transverse grid spacing y in succession and in a height direction Z of the computing device 100 arranged at a height grid spacing z one above the other from each other. In the in 1 illustrated embodiment, the height grid spacing z is preferably less than or equal to a height unit HE of a 19 '' - standard rack format. When as component groups 104 For example, computing units in mini-ITX format may be used, in a volume equivalent to one volume of a standard prior art server cabinet, which is approximately 42U × 60cm × 100cm, and theoretically 112 Computer units, currently realizable 96 computational nodes can accommodate in the 1 shown arrangement up to 720 Arithmetic units are housed. In a computing device according to the invention 100 in that the cooling function is perceived by the supporting parts, an increase in the packing density of computing nodes compared to the prior art of up to a factor of currently at least 7.5 is consequently possible. This dense packing is due to the flat design of the heat sink 1a achieved, in which the heat dissipation through the heat removal organs 2 takes place on the narrow sides B, while the heat absorption over the component groups 104 facing flat sides C takes place.
  • In 2 is the support device 101 the computing device 100 without heat sink 1a and components or component groups 104 shown. The complementary fasteners 105 each form arranged in grid mounting positions 106 for the carrying heat sink 1a , As shown, the attachment positions at the side grid spacing x and height grid spacing y can be made to a respectively adjacent attachment position 106 be spaced apart.
  • The support device 101 with the integrated cooling system can inlet openings I and / or outlet openings O for a cooling medium, for example in a side area 107 , an upper area 108 and / or a pedestal or sub-area 109 exhibit. The cooling medium can enter and exit through the base 109 for example in meandering cooling channels (not shown) by the support means 101 be guided. Alternatively, you can the cooling medium along the height direction Z from the lower area 109 to the upper area 108 be directed. Furthermore, the cooling medium in the side area 107 be discharged on and off the opposite side area. Such an arrangement of a coolant leading central heat dissipation in the wall support means 101 can be a uniform cooling of the support device 101 enable.
  • In the support device 101 For example, conveying means (not shown) for the coolant, such as pumps or fans, can be integrated. Since the warm area W and the cold area K by the support means 101 hermetically separated from each other, in the cold area K, in which it depends on a high heat dissipation, powerful funding can be used without this leading to excessive noise in the warm area W. The decentralized heat transfer in the warm area W, where each heat sink 1a a certain number of component groups is assigned, in contrast, does without circulation of a coolant.
  • The mounting positions 106 are arranged easily accessible from the warm area W forth. They allow a simple assembly of the computing device 100 by adding the required number of component groups 104 by means of the heat sink 1a at the support device 101 is attached. Preferably, this is the respective component group 104 with the associated cooling component group carrier 1 preassembled. There are no drawers, boxes or housings required because no additional air cooling is necessary. The waste heat of the electronic component groups 104 is for the most part about the support structure 102 derived. An additional air conditioning of the warm area W is not required.
  • The support device 101 may be made of metal, for example, to ensure good heat conduction between the heat removal organs 2 and the mounting positions 106 to ensure. However, it is also conceivable that only the attachment positions 106 are made of metal or other good heat conducting material and other portions of the support means 101 made of other materials. Alternatively, the attachment positions 106 be configured as openings to a fluid channel for example, cooling air. The heat removal member 2 may protrude through the openings in the fluid channel and / or form a wall of the fluid channel and thus beyond the cold wall 103 be cooled directly.
  • The fluid channel is preferably connected to the heat accumulator 200 , in particular via a thermal bridge, in thermal contact, so that in case of power failure, the waste heat of the component group carrier 104 can be passed to the heat storage. The fluid channels could be arranged so that in the de-energized state, a heat-boosting, thermally driven flow to the heat storage results. For example, the heat accumulator can be arranged around the fluid lines and / or above the fluid lines.
  • Due to the thermal coupling of the heat sink 1a with the cold wall 103 and the cold wall 103 with the heat storage 200 creates a thermal bridge 204 from the rallying groups 104 to the heat storage 200 , Thus, even in case of power failure, sufficient waste heat is transported to the heat storage.
  • In another embodiment, at the attachment positions 106 to the heat removal member complementary discharge surfaces 110 be arranged, which is the respective heat dissipation member 2 of the heat sink 1a contact thermally conductive. The heat removal organs 2 and drainage surfaces 110 contact each other thermally conductive, as possible flat and air gapless, optionally with the interposition of thermally conductive pads or pastes to compensate for manufacturing tolerances.
  • In 2 is further indicated by a dashed line that the heat storage 200 according to an embodiment in the form of a fluid reservoir or a solid plate on the cold wall 103 can be appropriate.
  • With reference to the 3 is now the construction of a heat sink 1a or component group carrier 1 described.
  • The heat sink 1a is flat construction with two limited by narrow sides B flat sides C designed. One of the component group 104 facing evaporation wall 5 of the heat sink 1a is arranged on a flat side C and has on its outer side preferably one or more heat receiving surfaces 6 on. The heat receiving surfaces 6 jump from the evaporation wall 5 in the direction of the respectively assigned component group 104 before and make tabs 7 ,
  • Furthermore, spacers 8th provided, also from the evaporation wall 5 protrude. The spacers 8th define with theirs from the evaporation wall 5 opposite ends of a mounting plane E, in the example, a board of the component group 104 after its attachment to the heat sink 1a to come to rest. The spacers 8th usually jump forward than the projections 7 , In the case of the evaporative cooler, the evaporation wall forms 5 the heat absorption area 104 ' ( 1 ).
  • In the mounting plane E, the board is held so that the at the projections 7 shaped heat receiving surfaces 6 Contact different components on the board.
  • Into the spacers 8th can the fasteners 4 be integrated, for example, in the form of threaded holes, latching openings, clips, latching hooks or the like.
  • Furthermore, in 3 it can be seen that the heat removal member 2 is designed as a kind of flange, which over the evaporation wall 5 and in particular the attachment level E survives. The heat removal member 2 thus forms a protection and a positioning aid for the component group 104 ,
  • The heat removal member 2 points in the in 3 illustrated embodiment on its narrow side B a preferably planar heat conduction surface 2 ' whose normal vector is substantially parallel to a main heat dissipation direction F of the heat sink 1a runs. Along the main heat removal direction F, the majority of the waste heat of the component group 104 transported and, at its end via the heat dissipation member 2 issued. A main heat receiving direction A, in which the waste heat of the component group 104 in the heat sink 1a is introduced, runs substantially perpendicular to the flat side C of the heat sink 1a , The main heat receiving direction A and the main heat removing direction F are substantially perpendicular to each other.
  • The heat sink 1a of the 4 differs in its design something of the heat sink 1a the previous embodiments. These differences are discussed below. In 4 is an example of a functional unit 111 a computing device according to the invention 100 shown. The functional unit 111 represents, for example, a single computer to the the computing device 100 modularly expandable. The functional unit 111 includes at least the component group 104 and, as a central attachment point, as a heat sink 1a designed component group carrier 1 , In addition, the functional unit 111 another electronic accessory to be cooled 112 have, for example, a storage or communication device. 4 shows an example of a hard disk.
  • In 4 It can be seen that the positions of the fasteners 4 of the heat sink 1a on the positions of the complementary fasteners 105 the component group 104 are coordinated. Furthermore, number, positions and preferably also heights H of the projections 7 on the number, positions and preferably also heights J of heat-generating electronic components 113 the component group 104 Voted. With the help of the projections 7 can the components to be cooled 113 even then be contacted, if not to be cooled components 114 the components to be cooled 113 overtop. projections 7 are arranged so that the components 113 not in the area of the projections 7 lie. The length of the spacers is such that even the highest non-cooling components 114 a component group 104 between the mounting plane E and the evaporation wall 5 can be included. Is the component group 114 in the mounting plane E, so are the surfaces 115 the waste heat generating components 113 at the heat receiving surfaces 6 the evaporation wall 5 at.
  • In the in 4 the embodiment shown is the heat dissipation member 2 as a ribbed cooler 9 equipped with external cooling fins. The heat sink 1a is as evaporation heat sink with a fluid space 10 The top of a condensation wall 11 is limited. The condensation wall 11 can with condensation bodies 12 be provided, for example, as in the fluid space projecting internal cooling fins an enlargement of the condensation wall 11 cause and drain the condensing fluid better.
  • The condensation wall 11 is located on one of the heat receiving surface 6 opposite, here upper flat side 13 of the heat sink 1a , The condensation wall 11 is, regardless of the specific design of the heat sink 1a on a ceiling 14 of the heat sink 1a arranged, since the hot vapor phase of the fluid against the direction of gravity G always flows upwards. At least in a partial area, in the embodiment of 4 in the heat removal device 2 remote portion, decreases the height of the fluid space.
  • The material cross section of the condensation wall 11 takes in the transverse direction Y in the direction of the heat dissipation member 2 to, so that the heat transfer in the direction of the increasing cross-section to the heat dissipation member 2 towards the other directions. The heat removal member 2 and the condensation wall 11 are designed in one piece and form a shell 15 of the heat sink 1a on a lower part 16 of the heat sink 1a is designed to be placed. The lower part 16 is the electronic assembly 104 facing. The upper and lower parts are made of die-cast aluminum and laser-welded together.
  • Opposite of the component group 104 facing flat side C can, like 4 shows a shot 17 be shaped to the attachment 112 on the heat sink 1a to keep. The from the attachment 112 Heat generated during operation is transmitted through a heat receiving surface 18 in the heat sink 1a directed. The heat removal member 2 can also the heat receiving surface 18 surpass and thus provide protection for the attachment 112 form.
  • The heat sink 1a holds and carries as part of the support structure 102 both the electronic component group 104 as well as the attachment 112 ,
  • In 5 is the functional unit 111 of the 4 shown in an assembled state. The heat sink 1a carries the electronic component group 104 to the fastener 4 . 105 , The at the projections 7 shaped heat receiving surfaces 6 are heat-conducting to the electronic components 113 coupled. The heat receiving surfaces 6 and or 18 may be provided with thermal grease, adhesive and / or pad as needed to facilitate heat transfer from the components 113 to the heat sink 1a to improve and to compensate for tolerances.
  • Out 5 is particularly apparent that with a heat sink according to the invention 1a a very flat construction functional unit 111 is created. The functional unit 111 Can be preassembled over the heat sink 1a simply on the support device 101 be attached.
  • 6 shows the lower part 16 in a schematic perspective view. At the bottom 16 shaped side walls 18 limit with lateral inner surfaces 19 the fluid space 10 , On its underside is the fluid space 10 through one of the evaporation wall 5 formed evaporation surface 20 limited. The evaporation surface 20 is on the inside, the heat receiving area 5 ' on the outer surface of the evaporation wall 5 of the heat sink 1a arranged.
  • The evaporation wall 5 may sink one or more fluid collection extending counter to the height direction Z. 21 have in the form of depressions. The positions of the fluid collection sinks 21 are on the positions of the projections 7 coordinated: a lead 7 on the outside of the heat sink 1a forms on the inside, in the fluid space 10 , a fluid collection sink 21 , Furthermore, the evaporation wall 5 at least one component holder 22 for receiving particularly high components 113 or 114 exhibit. The component holder 22 forms one in the fluid space 10 protruding projection.
  • 7 shows a further embodiment of a heat sink according to the invention 1a in a schematic sectional view. The electronic assembly 104 facing flat side C, which in 7 a floor 23 forms on her the fluid space 10 facing side of the evaporation surface 20 and on its electronic component group side facing the heat receiving area 5 ' out. At the condensation wall 11 are condensation bodies 12 formed in the embodiment of the 7 as rib-shaped Wärmeleitbrücken 12 ' along the ceiling 14 to the heat removal device 2 extend and over a heat removal device 2 formed rear side wall of the fluid space 10 as well as over or as part of the ceiling 14 with the heat dissipation member 2 are thermally conductively connected. Between the thermal bridges 12 ' flow channels are formed, which close the vapor phase to the heat removal member 2 conduct.
  • The cross-sectional area of the condensation body 12 takes towards the heat dissipation device 2 towards. In 7 this is achieved by increasing the height K of the ribs.
  • In the in 7 illustrated embodiment, it is clear by way of example that a Hauptwärmeabfuhrweg Q of the heat-transmitting coupled to the component evaporation wall 5 through the to the evaporation surface 20 adjacent fluid space 10 over the condensation wall 11 and / or the condensation bodies 12 to the heat dissipation member 2 runs. From the heat removal device 2 the waste heat is released further, for example to the cold wall 103 ( 1 ) or to outside of a computer housing, not shown here.
  • The condensation wall 11 preferably runs transversely to a pointing in the direction of gravity G vapor rising direction of the fluid 25 , The condensation wall 11 and the evaporation wall 5 are in the horizontally oriented heat sinks 1a of the 3 to 7 arranged parallel to one another and in the fluid space opposite one another. The height L of the fluid space is preferably on average less than or at most equal to a respective width and / or length of the fluid space extending transversely to the height direction Z. 10 , The heat removal member 2 can be transverse to the height direction Z of the condensation wall 11 extend away.
  • 8th shows the component group carrier 1 of the 7 in a perspective sectional view through the side walls 18 along the transverse direction Y. In the in 8th shown view can be seen that the condensation body 12 at the heat removal device 2 facing lateral inner surface 19 in one piece into the heat dissipation member 2 pass. The condensation body 12 can go to the ceiling 14 and to the heat dissipation member 2 preferably be conically widening designed to the heat conduction in the direction of the heat dissipation member 2 to improve.
  • 9 shows a further embodiment of a computing device or a computer system 100 in which the heat sink 1a in contrast to the embodiment of the 1 are vertically aligned.
  • The computing device 100 of the 9 also has a support structure 102 at the same time the electronic component groups 104 wears and cools. The support structure is preferably part of both the primary and the secondary cooling system 198 . 199 , Also the computer system of 9 can consist of two submodules 100a and 100b be formed together, as indicated by the dash-dotted line. The electronic component groups 104 are outside the computing device 100 in a warm area W of the computing device 100 arranged in several superimposed floors and within the floors next to each other. On each floor, the component group carriers are above the heatsinks 1a on refrigerated, horizontally extending floorboards 117 the support device 101 attached, for example suspended. This arrangement makes it possible, for example, two component group carrier 1 a common heat sink 1a assign and attach to this. The floor supports 117 are cooled and, for example, flows through a cooling medium. They are thus part of the cooling / support structure 102 ,
  • The warm area W is easily accessible to the maintenance and operating personnel, so that maintenance work, for example, the replacement of individual electronic component groups 104 , can be done easily and with little effort. The cold area K is, preferably hermetically separated from the warm area W, in the common support means 101 arranged. As with the computing device 100 of the 1 is by carrying heat sink 1a where the electronic component groups 104 are fixed, the waste heat from the warm area W in the cold area K passed without a cooling medium is exchanged between the two areas. The heat accumulator 200 is preferably arranged in the warm area.
  • The support device 101 can, as otherwise in the other embodiments, be designed in the form of a tank for a cooling fluid or have such a tank. The tank forms a heat storage, preferably a thermochemical or a latent heat storage. The cooling lines of the primary cooling system preferably pass through the tank interior and are thus thermally coupled to the heat accumulator. The walls of the cooling lines form the thermal bridges.
  • 10 shows by way of example the structure of a heat sink, as shown in the 10 can be used. The heat sink 1a is designed as evaporative cooling body, but may alternatively or additionally include one or more heat pipes, as explained above.
  • The heat sink 1a is, as in the previous embodiments, flat and on two opposite flat sides C with evaporation walls 5 Mistake. The evaporation walls 5 slightly inclined to each other, so that in a direction of gravity G tapered cross-section of the heat sink 1a results. The upper, the heat dissipation member 2 facing narrow side B of the heat sink has a larger surface area than the lower, from the heat dissipation member 2 opposite narrow side. Accordingly, the form on the evaporation walls 5 or heat receiving surfaces 6 adjacent component groups 104 an upwardly opening V-shaped arrangement.
  • 10 shows one with external cooling fins 9 provided heat dissipation member 9 , Instead of the external cooling fins 9 However, as in the previous embodiments, the heat dissipation member 2 designed as a flat surface on the cold wall 103 concern, as for example in the computing device 100 of the 9 the case is. There are the heat removal organs 2 flat on the cooled, board-shaped floor supports 117 the supporting structure 101 at.
  • Like in the 11 It is necessary to recognize the heat sink 1a not over the entire width of the component group 104 extend, but only the waste heat generating components 113 contact directly or indirectly.
  • The heat sink 1a can with one or more connectors 118 be structurally integrated. On the connectors 118 can the component groups 104 and / or the component groups 104 interconnecting communication and / or power supply lines are connected. Preferably, at least one connector 118 designed so that when attaching the heat sink 1a in the computing device 100 automatically connected to a mating connector (not shown).
  • Since in the hanging configuration of the heat sink, the component to be cooled 104 facing evaporation wall 5 no longer at the bottom of the fluid space 10 but is arranged on a lateral flat side C has proved to be advantageous when in the fluid space 10 a packing 28 is arranged, which serves both the heat conduction and the displacement of fluid, so that the fluid space 10 has a high level with only a small volume of fluid. Due to the high level, it should be ensured that all, including the top heat receiving surfaces 6 covered with liquid. The fluid 25 is in a gap 29 between the filler 28 and the flat sides C forming walls of the heat sink 1a ,
  • The filler 28 tapers, like the outer contour of the heat sink 1a , in the direction away from the heat dissipation device 2 , This causes the cross-sectional area of the packing 28 towards the heat dissipation member 2 increases and thus increasing in this direction towards increasing heat can be easily removed.
  • The condensation wall 11 is located in a flange-shaped base section 31 of the heat sink 1a directly on the heat dissipation device 2 , The base 31 jumps in the width direction with respect to the heat absorption areas 5 ' laterally in front. In the pedestal 31 the fluid space widens 10 on both sides of the packing 28 and forms a condensation chamber 32 , The base 31 used for mounting and positioning of the heat sink 1a in the computing device 100 , It preferably jumps in the width direction to at least the outer surface 33 the component groups 104 to protect them from damage at the same time.
  • For a vertical orientation of the heat sink 1a and the component group 104 are further modifications in the structure of the computing device 100 possible. One of these modifications is in 13 shown. The computing device 100 has an overall wall-shaped structure, the outside of the outer surfaces 33 the component groups 104 is formed. The interior of the wall-shaped computing device 100 forms a nearly closed warm area, which in turn surrounds the hermetically separated cold area. Each component group 104 can be a heat sink 1a be assigned to the waste heat of the respective components 113 the centrally cooled cooling area supplies.
  • In 13 is exemplified that the primary cooling system 198 a buffer container, for example an expansion vessel, which is connected to the inlet opening I and the outlet opening O. Even with the power supply switched off, a convection flow can develop in this embodiment, which pumps heated-up cooling fluid in the direction of the buffer tank. The cooling fluid cools down in the buffer container and sinks in the direction of the inlet O. The buffer container and the fluid serve as heat storage 200 of the emergency cooling system 199 , This system may be supplemented or replaced by an emergency cooling system in any of the embodiments described above.
  • The 14a to 14i show possibilities, the heat dissipation organ 2 to cool by means of a fluid flow. The fluid flow runs along a flow path S at the heat removal element 2 over or through the heat dissipation member 2 therethrough. A subsidy 119 leads an incoming or inflowing fluid to the heat dissipation member 2 , As a subsidy 119 For example, for gaseous fluids, such as cooling air, a fan or fan can be used. For liquid fluids can be used as a conveyor 119 a pump can be used.
  • According to the in 14a shown arrangement promotes the funding 119 , the part of the primary cooling system 198 may be, the fluid to the heat dissipation member 2 , The fluid is then passed through Kühlleitbleche 34 deflected and flows along the heat dissipation member 2 , For example, by cooling fins 9 , as a heated, outflowing or outflowing fluid S a laterally. Alternatively, the fluid can be deflected again before the outflow, as the dashed arrow indicates.
  • According to 14b carry two subsidies 119 to two sides of the heat removal member, the fluid in each case in the transverse direction Y. The two supplied fluid streams S E are centered on the heat removal member 2 merged, after in the lateral direction X along two sections of the heat dissipation member 2 have flowed, then merged in the transverse direction Y from the heat removal member 2 flow away. Also, this flow can be through appropriate baffles 34 be directed.
  • 14c shows an arrangement in which the two conveying means 119 the fluid in or opposite to the side direction X in two successive inflowing fluid streams S E in the heat dissipation member 2 convey, where the inflowing fluid flows S E are led away in the form of the discharged fluid flows SA.
  • 14d shows an embodiment of an arrangement in which the supplied fluid S E from the conveyor 119 opposite to the side X by the heat dissipation member 2 or its cooling ribs 9 through or on the heat dissipation surface 2 ' is guided along, then against the side direction X or alternatively in or against the transverse direction Y as a flowing fluid flow S A from the heat removal member 2 fortzuströmen.
  • 14e shows an arrangement with a heat sink 1a that with a variety of heat absorption areas 5 ' for receiving a corresponding plurality of electronic component groups 104 is designed. Individual component group sections 27 , each a complete cooling unit with an upper part 15 and a lower part 16 or may include the elements covered by it, are by a common heat dissipation member 2 connected with each other. Along or through this common heat dissipation member 2 the fluid flows in the opposite direction X.
  • 14f shows an embodiment of the heat sink 1a , with a tapered side portion of the heat dissipation member 2 on which the funding 119 is arranged so that it sucks the fluid in a supplied fluid flow S E in the transverse direction Y and deflects parallel to the lateral direction X. Analogous to in 14a In the embodiment shown, the fluid can then flow away against the lateral direction X or transversely thereto.
  • 14g shows a possible flow arrangement in which two conveying means 119 each on tapered sides of the heat dissipation member 2 are arranged and the fluid as in 14f deflected and then the two supplied fluid streams S E , similar to in 14b represented merged deflected as fluid streams SA are discharged.
  • 14h shows an arrangement in which the conveyor 119 in a conveyor on the heat sink 1a , is received and aligned in the transverse direction Y, so that it fluid through oblique end portions of the heat receiving member 2 as two along the respective side walls 18 extending supplied fluid streams S E sucks and discharges in the middle.
  • 14i shows an arrangement in which two supplied fluid streams S E respectively opposite to the transverse direction Y of a conveyor 119 from the outside into the heat removal device 2 or to the heat dissipation surface 2 ' are guided, where they are deflected in or against the side direction X, then, after a further deflection at each of a tapered end of the heat dissipation member 2 deflected opposite to the transverse direction Y as in each case a discharged fluid flow S A continued or outside along the side walls 18 flow to. Instead of the air flow, a heated area with liquid cooling may be connected.
  • The heat removal member 2 and the evaporative heat sink 102 are preferably part of the thermal bridge 204 that in case of failure of the primary cooling system 198 the waste heat of the component groups 1 with the lowest possible losses to the heat storage 200 conduct. This is done by the thermal coupling of the evaporative cooler to as a cooling system 199 serving support structure 102 ,
  • Within the scope of the inventive idea, deviations from the embodiments described above are possible. So the heat dissipation organ 2 or the heat dissipation surface 2 ' according to the respective requirements form at least in sections a part of a fluid channel and with external cooling fins 9 be provided, which can be flowed through by a fluid in the lateral direction X, transverse direction Y and / or height direction Z. funding 119 do not necessarily have to heat sink 1a can be arranged but can from the heat sink 1a or the support device 101 spaced to be arranged in a central conveyor of a central cooling system.
  • The heat sinks 1a Can be used as a rack for any number of electronic component groups 104 with electronic components 113 designed and with appropriate fasteners 3 . 4 be provided.
  • The heat absorption area 5 ' can according to the requirements according to any number of heat absorption surfaces 6 , lower flat sides 8th , Evaporation surfaces 20 , Fluid collection sinks 21 , Component recordings 22 , with recordings 17 , lower side walls 24 be configured to absorb the heat can. Accordingly, a heat receiving surface 6 also on a side wall 18 be formed.
  • A separation in shell 15 and lower part 16 not necessary. Instead, the heat sink can 1a be divided into a front and a back, for example, by applying the heat dissipation member 2 as a backward closure of the fluid space 10 , The fluid space may for example be made of a non-metallic material such as a ceramic or a plastic. The evaporation surface 20 , Condensation wall 11 and the heat-conducting with the condensation wall 11 connected heat dissipation member 2 can be made of a different material than the fluid space 10 be made forming floor, wall and ceiling elements. For this purpose, for example, metal plates that can be used and connected to one another in heat-conducting, in question.
  • The heat sink 1a does not necessarily have to be in direct contact with a component to be cooled 113 stand. As an alternative to the embodiments described here, for example, heat conduction films, pads and / or pastes based on copper, silver or carbon nanotubes (CNT) between the component 113 and the heat receiving surface 6 or adapter plates may be provided, the two adapter sides each complementary to a at least one of the components 113 comprehensive heat dissipation area of the electronic component group 104 or to the heat absorption area 5 ' . 104 ' can be designed to use the heat sink 1a , on different component groups 104 to enable.
  • The heat sink 1a can be designed so that it all electronic components 113 covered with waste heat in a projection in the height direction Z and prevents possible, that the waste heat the air within the computing device 100 warmed by placing it directly above the ground 23 , the side walls 18 and / or the ceiling 14 or through the fluid space 10 and / or other heat conducting means such as heat pipes for heat removal member 2 is continued from there.
  • To fill the as evaporative heat sink 1a designed heatsink 1a , this can be provided for example with a filling nozzle, cock and / or valve. In the fluid room 10 may be introduced boiling body.
  • The heat sink 1a can be provided in addition to the support function for modules with a BackPlane or bus board or back plate, which can be configured as a connection pad or adapter for the assembly and / or peripheral devices. It may be particularly advantageous to the heat sink 1a provided with a ground potential terminal, with the help of the heat sink 1a and / or the component group 104 for example, on the support device 101 can be grounded. By grounding, the heat sink can 1a for EMC protection of the component group 104 contribute. The component group 104 may be surrounded by a metallic or metallized shell grounded over the heat sink.
  • According to an experimental example, the heat sink according to the invention 1a showed a very high performance by cooling the CPU of a test component group with a power consumption of about 120 W to 65 ° C, whereas a prior art condenser under the same conditions could only cool the experimental component group to 80 ° C. Designed as a multi-spot cooler has the heat sink used in the experimental example 1a in addition to the CPU, the chipset (Northbridge / Southbridge) of the experimental device group was cooled to 38 ° C and 63 ° C, respectively, whereas a prior art heat sink could cool the chipset to 45 ° C and 92 ° C under the same experimental conditions. This temperature comparison is based on the comparison of core temperatures of microchips under full load with prime number calculation (Prime 95). The experimental component group used was a motherboard "DQ45EK" in Mini-ITX format, equipped with a CPU "Intel Core 2 Duo E7200".
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited patent literature
    • WO 06/055387 A1 [0005]
    • US 2009/025501 A1 [0006]
    • US 2005/0068728 A1 [0007]
    • US 2009/0262495 A1 [0009]

Claims (14)

  1. Cooling system ( 197 ) for a computing device ( 100 ) with at least one waste heat generating component group ( 104 ), wherein the cooling system is an electrically operated primary cooling system ( 198 ), characterized in that an emergency cooling system ( 199 ) is provided, one via at least one thermal bridge ( 204 ) with the at least one component group ( 104 ) coupled heat storage ( 200 ) having.
  2. Cooling system ( 197 ) according to claim 1, characterized in that the heat storage ( 200 ) has a fluid reservoir of predetermined volume or a predetermined volume of solids.
  3. Cooling system ( 197 ) according to claim 1 or 2, characterized in that the heat storage ( 200 ) a latent heat storage or a thermochemical heat storage ( 200 ).
  4. Cooling system ( 197 ) according to one of claims 1 to 3, characterized in that the heat capacity of the heat storage ( 200 ) at least equal to the amount of heat which in operation by the computing device ( 100 ) can be generated during a predetermined run-up time of an emergency power system that can be connected to the computing device.
  5. Cooling system ( 197 ) according to one of claims 1 to 4, characterized in that the heat storage ( 200 ) to the primary cooling system ( 198 ) is thermally coupled.
  6. Cooling system ( 197 ) according to one of claims 1 to 5, characterized in that fluid lines of the primary cooling system through the heat storage ( 200 ) are guided.
  7. Cooling system ( 197 ) according to one of claims 1 to 6, characterized in that the thermal bridge ( 204 ) at least one currentless operable heat pump, preferably an evaporative heat sink ( 102 ).
  8. Cooling system ( 197 ) according to one of claims 1 to 7, characterized in that the heat storage ( 200 ) the mass of a supporting structure ( 102 ) of the computing device ( 100 ).
  9. Cooling system ( 197 ) according to one of claims 1 to 8, characterized in that a plurality of component groups ( 104 ) are provided, which via a further thermal bridge ( 206 ) with a common cold wall ( 103 ) and that the cold wall over the thermal bridge ( 204 ) with the heat storage ( 200 ) connected is.
  10. Cooling system ( 197 ) according to one of claims 1 to 9, characterized in that the cooling system in a support structure ( 102 ) that integrates the component groups ( 104 ) wearing.
  11. Cooling system ( 197 ) according to one of claims 1 to 10, characterized in that the heat storage in the support structure ( 102 ) is integrated.
  12. Cooling system ( 197 ) according to one of claims 1 to 11, characterized in that the heat storage ( 200 ) a buffer storage of the primary cooling system ( 197 ).
  13. Computing device ( 100 ) with a plurality of waste heat generating electronic component groups ( 104 ), characterized by a cooling system ( 197 ) according to one of claims 1 to 12.
  14. Method for cooling a computing device ( 100 ) with at least one of its waste heat generating electronic component group ( 104 ) when the power supply is switched on by an electrically operated cooling system ( 198 ) is cooled, characterized in that in case of power failure and / or failure of the cooling system, the waste heat is dissipated via a thermal bridge to a heat storage.
DE201010051603 2010-10-29 2010-10-29 Cooling system for cooling computer with e.g. computing unit in mini-intermediate text block-format, has heat accumulator coupled with waste heat producing electrical or electronic component group by heat bridge Ceased DE102010051603A1 (en)

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DE201010051603 DE102010051603A1 (en) 2010-10-29 2010-10-29 Cooling system for cooling computer with e.g. computing unit in mini-intermediate text block-format, has heat accumulator coupled with waste heat producing electrical or electronic component group by heat bridge

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DE201010051603 DE102010051603A1 (en) 2010-10-29 2010-10-29 Cooling system for cooling computer with e.g. computing unit in mini-intermediate text block-format, has heat accumulator coupled with waste heat producing electrical or electronic component group by heat bridge

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10114998A1 (en) * 2000-06-08 2002-02-21 Merck Patent Gmbh Use of PCM in coolers for electronic battery
US20050068728A1 (en) 2003-09-30 2005-03-31 International Business Machines Corporation Thermal dissipation assembly and fabrication method for electronics drawer of a multiple-drawer electronics rack
WO2006055387A1 (en) 2004-11-14 2006-05-26 Liebert Corporation Integrated heat exchanger(s) in a rack for vertical board style computer systems
US20090025501A1 (en) 2006-07-05 2009-01-29 Mitteer David M Shifter with shape memory alloy and safety
US20090262495A1 (en) 2008-04-16 2009-10-22 Julius Neudorfer High efficiency heat removal system for rack mounted computer equipment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10114998A1 (en) * 2000-06-08 2002-02-21 Merck Patent Gmbh Use of PCM in coolers for electronic battery
US20050068728A1 (en) 2003-09-30 2005-03-31 International Business Machines Corporation Thermal dissipation assembly and fabrication method for electronics drawer of a multiple-drawer electronics rack
WO2006055387A1 (en) 2004-11-14 2006-05-26 Liebert Corporation Integrated heat exchanger(s) in a rack for vertical board style computer systems
US20090025501A1 (en) 2006-07-05 2009-01-29 Mitteer David M Shifter with shape memory alloy and safety
US20090262495A1 (en) 2008-04-16 2009-10-22 Julius Neudorfer High efficiency heat removal system for rack mounted computer equipment

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