DE102005029074B3 - Heat exchanger for cooling e.g. microprocessor, has heat exchanging unit (3) with inner structure that runs in flow direction for increasing heat transfer and extends in inner space from lower side to upper side - Google Patents

Heat exchanger for cooling e.g. microprocessor, has heat exchanging unit (3) with inner structure that runs in flow direction for increasing heat transfer and extends in inner space from lower side to upper side

Info

Publication number
DE102005029074B3
DE102005029074B3 DE200510029074 DE102005029074A DE102005029074B3 DE 102005029074 B3 DE102005029074 B3 DE 102005029074B3 DE 200510029074 DE200510029074 DE 200510029074 DE 102005029074 A DE102005029074 A DE 102005029074A DE 102005029074 B3 DE102005029074 B3 DE 102005029074B3
Authority
DE
Germany
Prior art keywords
heat exchange
exchange element
heat
heat exchanger
channel
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.)
Active
Application number
DE200510029074
Other languages
German (de)
Inventor
Karine Dr. Brand
Florian Dr. Schopper
Oliver WÖLFLIK
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.)
Wieland-Werke AG
Wieland Werke AG
Original Assignee
Wieland-Werke AG
Wieland Werke AG
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 Wieland-Werke AG, Wieland Werke AG filed Critical Wieland-Werke AG
Priority to DE200510029074 priority Critical patent/DE102005029074B3/en
Application granted granted Critical
Publication of DE102005029074B3 publication Critical patent/DE102005029074B3/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/12Elements constructed in the shape of a hollow panel, e.g. with channels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/048Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02Header boxes; End plates
    • F28F9/026Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/0263Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by varying the geometry or cross-section of header box
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/34Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/46Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
    • H01L23/473Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids by flowing liquids
    • 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
    • F28D21/00Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0028Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for cooling heat generating elements, e.g. for cooling electronic components or electric devices
    • F28D2021/0029Heat sinks
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001Technical content checked by a classifier
    • H01L2924/0002Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Abstract

The invention relates to a heat exchanger (1) for small components, which can be traversed by a fluid, consisting of several exclusively Umformtechnisch produced individual parts, the joining technique firmly together to an inlet channel (2), a flat heat exchange element (3) and an outlet channel (4) are, wherein the heat exchange element (3) has connectable with at least one heat source top and bottom, wherein DOLLAR A - the inlet channel (2) consists of a metal connecting pipe (21), the input to the heat exchange element (3) continuously widens DOLLAR A - the outlet channel (4), starting from the heat exchange part (3), the output side continuously tapers to a metal connecting pipe (41) and DOLLAR A - the heat exchange element (3) to increase the heat transfer has a channel-like inner structure (31) running in the flow direction, in the interior from the bottom to the Extends top.

Description

  • The The invention relates to a heat exchanger Small components, which can be traversed by a fluid, consisting of several exclusively Forming technical parts produced by joining technology fixed together to an inlet channel, a flat heat exchange element and an outlet channel are connected, wherein the heat exchange element one with at least one heat source has connectable top and bottom.
  • such Wärmeaustauscherwerden already used in various technical fields. Especially due to the very high heat output in microprocessors or in components of high-performance electronics gain heat exchanger with liquid cooling or Evaporation is becoming increasingly important.
  • So far to disposal standing heat exchanger in the form of water coolers for microprocessors are usually made from a copper or aluminum block by machining Machined. Therefore The single components solid material used is one Machining accordingly expensive and therefore expensive.
  • A further development using a non-cutting production method is mentioned in the publication DE 103 15 225 A1 described. From the document, a heat exchanger with a cup-shaped and a lid-shaped element is known, both of which can be connected together to form a dense interior with two openings through which a heat exchange medium into the interior or can be led out. The heat exchanger has a plurality of protruding into the interior elevations. The pot-shaped or lid-shaped elements are formed by a cold forming process and preferably by an extrusion molding process. By protruding into the interior elevations, the surface at which the cooling medium flows along, is correspondingly large in order to achieve the highest possible heat exchange performance. An essential goal, however, is a cost-effective production in large quantities.
  • Furthermore, from the document JP 2005019905 A a cooling device with a heat exchanger known, which is used as a heat sink for semiconductor devices. The heat exchanger has a structured interior to the heat source to increase the heat dissipation. These structures with low height expansion have no significant influence on the fluid flowing in the interior.
  • Also from the publication US 5,473,508 For example, a heat exchanger for cooling electronic components by means of an air flow is known. The heat exchanger consists of several individual parts, which are joining technology firmly connected to an inlet channel, a flat heat exchange element and an outlet channel. The lid and bottom element existing closed heat exchange element is in contact with the heat source.
  • Of the Invention is based on the object, a heat exchanger of the above training this type and this under specification of a cost To optimize the production process in its heat exchange capacity.
  • The Invention is represented by the features of claim 1. The others refer back claims relate to advantageous embodiments and further developments of the invention.
  • The Invention includes a heat exchanger Small components, which can be traversed by a fluid, consisting of several exclusively forming technology produced individual parts, the technical joining together to an inlet channel, a flat heat exchange element and an outlet channel are connected, wherein the heat exchange element one with at least one heat source connectable top and bottom, wherein the inlet channel consists of a Metallan connecting tube, which is the heat exchange element the input side continuously widens, the outlet channel, starting from the heat exchange part, yourself the output side is continuously tapered to a metal connecting pipe, and the heat exchange element to increase the heat transfer one in the flow direction extending channel-like internal structure, which is located in the interior extends from the bottom to the top.
  • The invention is based on the consideration that the heat exchanger consists of several parts exclusively manufactured by forming technology. The individual parts are in their geometry such that they can be produced by a cold forming process. In particular, it is advisable in this case to create a widening of the inlet channel into a conical transition or the taper of the outlet channel from a substantially round tube cross-section. In terms of joining technology, in this case the end face of the conically widened inlet channel is then connected to the input-side end face of the flat heat exchange element and the end face of the conically tapering outlet channel is connected to the outlet-side end face of the heat exchanger. The GE The design options of the forming technology thus determine, to a certain extent, the geometry of the top and bottom of the heat exchange element.
  • The Metal connection pipe of the inlet channel or outlet channel can basically have any cross-sectional shape, is for the sake of Forming and the fluidic Conditions, however, preferably round or oval. An important function has the heat exchange element running channel-like internal structure. This extends in the interior from the bottom to the top, whereby an increased heat transfer takes place.
  • Also the channel structure proves to be extremely stable compared to one Influence of external forces. These can occur when connecting and fixing a heat source on the heat exchanger what with the Anpress forces used in hollow interior structures would result that the common interface of the heat exchanger with the heat source deformed or even dented becomes. This comes into play especially if, for reasons of Material savings thin Walls are thought to be on such strong mechanical Loads are no longer designed. Only by forming processes can be opposite The already used cutting process already a material savings and so that a cost reduction can be achieved. The above-described constructive design of the interior with corresponding channel structures provides another contribution to this.
  • In In this context, the running in the flow direction Channel-like internal structures not necessarily continuous side walls. As well can also in the flow direction at shorter intervals arranged pins or blocks a corresponding channel structure form. As a result, however, in such a way that, in terms of fluid mechanics, an advantageous structural design results.
  • When joining methods Particularly suitable are the already widely used in the art soldering, gluing or welding. The frontally abutting surfaces of the heat exchange element with However, the inlet or outlet channel can also by the front side formed grooves can be plugged into each other.
  • A other two-piece design the formed parts can be made of two in the longitudinal direction formed half-elements, the joining technique only in the longitudinal direction with each other need to be connected.
  • Of the particular advantage is that with correspondingly thin walls the heat exchanger across from Deformations is stable accordingly. The running in the interior channels to lead while the one- or two-phase fluid targeted by the heat exchanger, so that the heat exchange performance is optimized for mechanical stability becomes. In particular, the conical entry or
  • Exit channels provide through a flowing transition for one uniform fluid distribution with lowest pressure drop in the flow.
  • In Preferred embodiment of the invention, the internal structure so be formed so that the fluid flow over the cross section constant is. This can be over, for example a different width of the channel-like internal structure, hereinafter also as channels be achieved, being in the middle of the heat exchanger smaller channel cross sections are present, the on both sides Outside increase. From the inlet channel is in this way the main flow in entire heat exchanger evenly distributed.
  • The constructive design of the internal volume of the heat exchange element with respect on fluid mechanics favorable conditions finds special attention. So can advantageously the Internal structure of the heat exchange element in Continue inlet duct and / or outlet duct. This will already the fluid immediately after passing out of the metal connection pipe in the widening part of the heat exchange element according to fluid mechanics Great Viewpoints distributed in the individual channels accordingly. Such structures are preferably in the inlet channel. On the output side can channels in the rejuvenating Part of the heat exchange element but also the fluid flow direct and fluidic Cheap impact.
  • In Another advantageous embodiment of the invention, the internal structure from continuous ribs exist, the channels form. Continuous ribs are especially in case of small rib distances with forming process manufacturing technology reliable manufacture. The ribs run as partitions in the interior of the bottom to the top and form the individual longitudinal channels in which in the operating state, the fluid out becomes.
  • Advantageously, the internal structure can consist of rods or pyramids projecting from the inner wall. However, these are always arranged so that form channel-like internal structures in the flow direction. As a result, structurally favorable structures are generated which exchange some fluid with adjacent ones Still allow channels.
  • In Another preferred embodiment, the heat exchange element may be integrally formed. However, with the underlying forming process this is only below certain conditions possible. Preference is given to the one-piece Training, the channel structure with continuous in the interior longitudinal Ribs generated. This will be for the heat exchange element the technical joining Effort reduced. one-piece Heat exchange elements are only connected to the inlet channel and the outlet channel.
  • advantageously, can the inlet channel, the heat exchange element and the outlet channel be arranged in alignment. In other words, the elongated Shape has no more bends in tight radii and favors so a uniform fluid flow through the entire heat exchanger.
  • alternative have to However, designs may also be considered when the heat exchanger, for example, as a heat sink for microprocessors or other heat generating components in a computer, only a small amount of space to disposal stands. Advantageously, can then the inlet channel and / or the outlet channel from the heat source run away. This is usually only possible with as possible huge Bend radii happen that support the most undisturbed fluid flow possible.
  • at The use of copper and copper alloys may be at some the common one Fluids a corrosion can not be excluded. advantageously, then can the inner surface of the heat exchanger be coated.
  • Further Advantages and embodiments of the invention will be apparent from the schematic Drawings closer explained.
  • there demonstrate:
  • 1 a view of a heat exchanger with a heat source,
  • 2 a cross section of a heat exchange element with cover and bottom,
  • 3 a cross section of a heat exchange element with the same design lid and bottom and interlocking internal structure,
  • 4 a cross section of a heat exchange element with the same design lid and bottom and successive inner structure,
  • 5 a cross section of a formed from stacked trays heat exchange element with a final cover,
  • 6 a cross section of an integrally formed heat exchange element,
  • 7 a plan view of a heat exchanger with channel-like structures of different widths, and
  • 8th a plan view of a heat exchanger with channel-like structures that continue into the inlet channel and outlet channel.
  • each other corresponding parts are in all figures with the same reference numerals Mistake.
  • In 1 is a schematic view of a heat exchanger 1 with a heat source 5 shown. The heat exchanger 1 consists of an inlet channel 2 a flat heat exchange element 3 and an exit channel 4 , which are connected by joining technology. The heat source 5 is on the bottom of the heat exchange element 3 arranged. The entrance channel 2 consists of a metal connection pipe 21 leading to the heat exchange element 3 on the input side continuously expands. The shape of the inlet channel shown in the figure can be produced in one piece by means of a forming process, such as extruding. The joint is in this case at the common contact surface of the inlet channel 2 to the heat exchanger element 3 , Likewise, there is the exit channel 4 which can also be in one piece, from a collection zone 42 and a metal connection pipe 41 , The collection zone 42 tapers continuously to the metal connection pipe 41 , The joint is located at the common contact surface of the outlet channel 4 to the heat exchange element 3 ,
  • The heat source 5 is an electronic component, such as a microprocessor. The heat source 5 is often supported with staples or an adhesive bond, whereby the heat well conductive intermediate layers are used. For intermediate layers, the heat source 5 under a contact pressure with the heat exchanger 1 connected. In the embodiment shown, the inlet channel run 2 and the exit channel 4 from the heat source 5 directed away.
  • 2 shows a cross section of a two-part heat exchange element 3 with lid 32 and soil 33 , The inner structure is together with the ground 33 Shaped, the lid 32 is firmly attached to the ground. Joining technically come to the connection from lid 32 and soil 33 Welding, soldering or adhesive joints or interference fits into consideration. Preference is given to joining methods which do not thermally and mechanically lead to a deformation of the component.
  • 3 shows a cross section of a heat exchange element 3 with the same lid 32 and soil 33 and an interlocking internal structure 31 , The inner structure is in each case half together with the lid 32 and the floor 33 shaped. This offers forming technology the advantage, for example, in continuous ribs in the lid 32 and soil 33 To provide coarser structures that mesh together after assembly so that correspondingly small channels arise.
  • In a further embodiment shows 4 in cross section a heat exchange element 3 with the same lid 32 and soil 33 , Both form successive set the channel-like inner structure.
  • 5 shows a cross section of one of two stacked trays 33 formed heat exchange element 3 with final lid 32 , Such structures may be considered, for example, if a heat source is arranged both on the top side and on the bottom side.
  • In 6 is a further embodiment of the heat exchange element 3 represented, which can be made in one piece by means of extrusion. One-piece components are preferred for manufacturing reasons for larger channel structures used. These can also be manufactured continuously and cut to the appropriate dimension.
  • 7 shows a plan view of one in the region of the heat exchange element 3 cut heat exchanger 1 with channel-like structures of different widths. The channels of the internal structure 31 are designed so that the fluid flow over the cross section of the heat exchange element 3 is constant and forms a uniform pressure drop in the flow direction of the fluid.
  • 8th shows a plan view of a partially cut heat exchanger 1 with channel-like structures extending into the inlet channel 2 and exit channel 4 continue. In this embodiment, the fluid is already immediately after the passage from the metal connection pipe 21 in the widening part of the distribution zone 22 or from the tapered parts of the collection zone 42 of the heat exchanger 1 according to flow mechanics favorable viewpoints in the individual channels of the internal structure 31 distributed and to the metal connection pipe 41 collected again.
  • 1
    heat exchangers
    2
    inlet channel
    21
    Metal connecting tube
    22
    distribution zone
    3
    Heat exchange element
    31
    internal structure
    32
    cover
    33
    ground
    4
    outlet channel
    41
    Metal connecting tube
    42
    collection zone
    5
    heat source

Claims (9)

  1. Heat exchanger ( 1 ) for small components, which can be traversed by a fluid, consisting of a plurality of exclusively formed by technical components, the joining technical firmly together to an inlet channel ( 2 ), a flat heat exchange element ( 3 ) and an exit channel ( 4 ), wherein the heat exchange element ( 3 ) has a connectable to at least one heat source top and bottom, characterized in that - the inlet channel ( 2 ) from a metal connecting pipe ( 21 ), which forms the heat exchange element ( 3 ) on the input side continuously to the entire flow-through cross-sectional area of the input-side end face of the heat exchange element ( 3 ) expands, - that the outlet channel ( 4 ), starting from the heat exchange element ( 3 ), the output side continuously from the entire through-flow cross-sectional area of the output-side end face of the heat exchange element ( 3 ) to a metal connection pipe ( 41 ), and - that the heat exchange element ( 3 ) to increase the heat transfer, a channel-like internal structure running in the direction of flow ( 31 ), which extends in the interior from the bottom to the top.
  2. Heat exchanger according to claim 1, characterized in that the internal structure ( 31 ) is formed so that the fluid flow over the cross section is constant.
  3. Heat exchanger according to claim 1 or 2, characterized in that the internal structure ( 31 ) of the heat exchange element ( 3 ) in the entrance channel ( 2 ) and / or exit channel ( 4 ) continues.
  4. Heat exchanger according to one of claims 1 to 3, characterized in that the internal structure ( 31 ) consists of continuous ribs, the Form channels.
  5. Heat exchanger according to one of claims 1 to 3, characterized in that the internal structure ( 31 ) consists of protruding from the inner wall bars or pyramids.
  6. Heat exchanger according to one of claims 1 to 4, characterized in that the heat exchange element ( 3 ) is integrally formed.
  7. Heat exchanger according to one of claims 1 to 6, characterized in that the inlet channel ( 2 ), the heat exchange element ( 3 ) and the exit channel ( 4 ) are arranged in alignment.
  8. Heat exchanger according to one of claims 1 to 6, characterized in that the inlet channel ( 2 ) and / or the exit channel ( 4 ) from the heat source ( 5 ) run away.
  9. heat exchangers according to one of the claims 1 to 8, characterized in that the inner surface is coated is.
DE200510029074 2005-06-23 2005-06-23 Heat exchanger for cooling e.g. microprocessor, has heat exchanging unit (3) with inner structure that runs in flow direction for increasing heat transfer and extends in inner space from lower side to upper side Active DE102005029074B3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE200510029074 DE102005029074B3 (en) 2005-06-23 2005-06-23 Heat exchanger for cooling e.g. microprocessor, has heat exchanging unit (3) with inner structure that runs in flow direction for increasing heat transfer and extends in inner space from lower side to upper side

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE200510029074 DE102005029074B3 (en) 2005-06-23 2005-06-23 Heat exchanger for cooling e.g. microprocessor, has heat exchanging unit (3) with inner structure that runs in flow direction for increasing heat transfer and extends in inner space from lower side to upper side
US11/922,477 US20090236083A1 (en) 2005-06-23 2006-06-16 Heat Exchanger for Small Components
PCT/EP2006/005776 WO2006136325A1 (en) 2005-06-23 2006-06-16 Heat exchanger for small components
EP20060754389 EP1894238A1 (en) 2005-06-23 2006-06-16 Heat exchanger for small components

Publications (1)

Publication Number Publication Date
DE102005029074B3 true DE102005029074B3 (en) 2006-08-10

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DE200510029074 Active DE102005029074B3 (en) 2005-06-23 2005-06-23 Heat exchanger for cooling e.g. microprocessor, has heat exchanging unit (3) with inner structure that runs in flow direction for increasing heat transfer and extends in inner space from lower side to upper side

Country Status (4)

Country Link
US (1) US20090236083A1 (en)
EP (1) EP1894238A1 (en)
DE (1) DE102005029074B3 (en)
WO (1) WO2006136325A1 (en)

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DE102007017623A1 (en) * 2007-04-12 2008-10-30 Rittal Gmbh & Co. Kg Assembly plate for electrical or electronic components, has plate body made of metal, which is streaked by cooling channels for conducting cooling fluid
DE102007029377A1 (en) * 2007-06-26 2009-01-08 Continental Automotive Gmbh Method for heat removal of electronic components for operation of a liquid pump

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US10018430B2 (en) 2013-03-14 2018-07-10 Rochester Institute Of Technology Heat transfer system and method incorporating tapered flow field
JP6593214B2 (en) * 2016-02-10 2019-10-23 オムロン株式会社 Cooler, flow path unit

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Also Published As

Publication number Publication date
EP1894238A1 (en) 2008-03-05
US20090236083A1 (en) 2009-09-24
WO2006136325A1 (en) 2006-12-28

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