JP3897024B2 - Liquid circulation type cooling system - Google Patents

Liquid circulation type cooling system Download PDF

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Publication number
JP3897024B2
JP3897024B2 JP2004033761A JP2004033761A JP3897024B2 JP 3897024 B2 JP3897024 B2 JP 3897024B2 JP 2004033761 A JP2004033761 A JP 2004033761A JP 2004033761 A JP2004033761 A JP 2004033761A JP 3897024 B2 JP3897024 B2 JP 3897024B2
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liquid
reserve tank
liquid circulation
heat
cooling device
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JP2005228810A (en
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寛規 北嶋
一志 酒寄
忠 高橋
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Hitachi Cable Ltd
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Hitachi Cable Ltd
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Priority to JP2004033761A priority Critical patent/JP3897024B2/en
Priority to US10/885,005 priority patent/US20050173097A1/en
Priority to KR1020040055356A priority patent/KR100605422B1/en
Priority to CNB2004100840176A priority patent/CN100559924C/en
Priority to TW093131471A priority patent/TW200526913A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/46—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
    • H01L23/473—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids by flowing liquids
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-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
    • F28D15/02—Heat-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
    • F28D15/0266—Heat-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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
    • F28F2250/08—Fluid driving means, e.g. pumps, fans
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)

Description

本発明は、系内で液体を循環させて発熱体から発生する熱を液体を介して放熱スペースに移送して放熱する液循環型冷却装置に関し、特に、電子機器に搭載された場合にその電子機器の天地逆転設置を可能とする液循環型冷却装置に関するものである。   The present invention relates to a liquid circulation type cooling device that circulates liquid in a system and transfers heat generated from a heating element to a heat radiation space through the liquid to dissipate heat. The present invention relates to a liquid circulation type cooling device that enables the device to be installed upside down.

近年、電子機器の高性能化が進んでおり、特に、本体内に収容される中央演算処理装置(CPU:Central Processing Unit)等の回路部品や、電源装置の発熱量が増大しており、外部への放熱性向上が望まれている。   In recent years, the performance of electronic devices has been improved, and in particular, the amount of heat generated by circuit components such as a central processing unit (CPU) housed in the main body and the power supply device has increased. Improvement of heat dissipation is desired.

発熱体の放熱を促すものとして、熱伝導性に優れる金属製のヒートシンクをＣＰＵ等の発熱体に設け、このヒートシンクを空冷する冷却装置が知られているが、空冷型の冷却装置は放熱量に応じたヒートシンクの放熱面積を必要とするために装置の大型化を招くという不都合がある。また、近年、電子機器に要求される高速演算処理性や多機能性に伴ってＣＰＵの発熱量は増大する傾向にあり、空冷型の冷却装置では放熱性がほぼ限界に達している。   As a means of encouraging heat dissipation of the heating element, there is known a cooling device in which a heat sink made of metal having excellent thermal conductivity is provided on a heating element such as a CPU and this heat sink is air-cooled. There is a disadvantage in that the size of the apparatus is increased because a corresponding heat radiation area of the heat sink is required. In recent years, the amount of heat generated by the CPU tends to increase with high-speed arithmetic processing performance and multi-functionality required for electronic devices, and the heat dissipation performance of the air-cooled cooling device has almost reached its limit.

かかる放熱性を改善するものとして、冷却液等の伝熱媒体を用いた液循環型冷却装置が知られている（例えば、特許文献１参照。）。   As a means for improving such heat dissipation, a liquid circulation type cooling device using a heat transfer medium such as a cooling liquid is known (for example, see Patent Document 1).

図８は、従来の液循環型冷却装置の回路を示す概略図である。この液循環型冷却装置５０は、液体を循環させる循環ポンプ５１、発熱素子等の被冷却物に接続され被冷却物から効率良く熱を液体に伝える受熱体５３、放熱スペースに配置され機器筐体外に熱を放熱する放熱器５２、放熱器５２の上方に設けられ循環する液体を貯蔵するリザーブタンク５６、放熱器５２の下方に設けられるヘッダー５７、各部材間を連結し、フレキシブルチューブまたは固定配管からなる配管５４、及び放熱器５２に風を与え強制空冷を行うファン５５を備えている。   FIG. 8 is a schematic diagram showing a circuit of a conventional liquid circulation type cooling device. This liquid circulation type cooling device 50 is connected to an object to be cooled such as a circulation pump 51 that circulates a liquid, a heating element, etc., and a heat receiving body 53 that efficiently transfers heat from the object to be cooled to the liquid. A heat dissipator 52 that dissipates heat, a reserve tank 56 that is provided above the heat dissipator 52 and stores a circulating liquid, a header 57 that is provided below the heat dissipator 52, and the members are connected to each other by a flexible tube or a fixed pipe. And a fan 55 for supplying air to the radiator 52 and performing forced air cooling.

この液循環型冷却装置５０では、循環ポンプ５１を駆動することによって循環回路に液体を循環させることにより、発熱素子等の被冷却物から発生する熱を受熱体５３で受容して液体に伝熱し、循環される液体によって放熱器５２へ移送してファン５５により強制空冷して放熱する。   In this liquid circulation type cooling device 50, by circulating the liquid in the circulation circuit by driving the circulation pump 51, the heat generated from the object to be cooled such as the heating element is received by the heat receiving body 53 and transferred to the liquid. Then, the liquid is circulated to the radiator 52 and forcedly cooled by the fan 55 to radiate heat.

上記液循環型冷却装置５０において、リザーブタンク５６は、各部材の接続部や部材表面からの透液等を考慮し、系の保有液体量を一定にするために設けられるが、電子機器に近接して設置する場合には液漏れを防ぐために密閉構造とする必要がある。しかし、密閉構造では液体の温度変化により系内に圧力変化が生じる。特に、液体の温度上昇時には圧力が上昇することから、リザーブタンク５６内は、液体５６Ａだけでなく圧力上昇にも対応できるように空気層５６Ｂを設けている。また、循環ポンプ５１や放熱器５２、受熱体５３に空気が混入した場合は著しく性能が低下するため、リザーブタンク５６の位置は、一般に系の最も高い位置に配置される。
特開２００３−２０９２１０号公報（図２） In the liquid circulation type cooling device 50, the reserve tank 56 is provided in order to keep the amount of liquid held in the system constant in consideration of liquid permeation from the connection portions of the members and the surface of the members. In order to prevent liquid leakage, it is necessary to have a sealed structure. However, in a sealed structure, a pressure change occurs in the system due to a temperature change of the liquid. In particular, since the pressure increases when the temperature of the liquid rises, an air layer 56B is provided in the reserve tank 56 so as to cope with not only the liquid 56A but also the pressure rise. In addition, when air enters the circulation pump 51, the radiator 52, and the heat receiving body 53, the performance is remarkably deteriorated. Therefore, the reserve tank 56 is generally arranged at the highest position in the system.
JP2003-209210A (FIG. 2)

しかしながら、電子機器において使用時の設置状態が固定されている場合は、リザーブタンク５６の位置を常に機器内の最上位に保つことは可能であるが、ユーザーの使い勝手により設置姿勢が変わる場合すなわち天地が逆転する場合は、リザーブタンク５６が最下位となってしまう。   However, when the installation state at the time of use is fixed in the electronic device, it is possible to always keep the reserve tank 56 at the highest position in the device. However, when the installation posture changes depending on the user's convenience, Is reversed, the reserve tank 56 becomes the lowest position.

図９に、図８の液循環型冷却装置５０を天地逆転した場合の回路の概略図を示す。この場合は、放熱器５２の上方にヘッダー５７が位置することになり、放熱器５２からヘッダー５７を経由して循環ポンプ５１方向へ液体が流れる。しかしながら、ヘッダー５７内では液体５７Ａの上部に空気層５７Ｂが存在することになり、液体がヘッダー５７の下流側の配管５４に流れる際に、空気も配管５４内に流入することになる。配管５４に空気が混入すると液体の循環性が低下し、循環機能が著しく低下してしまう。   FIG. 9 shows a schematic diagram of a circuit when the liquid circulation type cooling device 50 of FIG. In this case, the header 57 is positioned above the radiator 52, and the liquid flows from the radiator 52 toward the circulation pump 51 via the header 57. However, the air layer 57 </ b> B exists above the liquid 57 </ b> A in the header 57, and when the liquid flows into the pipe 54 on the downstream side of the header 57, air also flows into the pipe 54. If air is mixed into the pipe 54, the circulation of the liquid is lowered, and the circulation function is significantly lowered.

このように、電子機器の使用時の設置状態が天地逆転するケースとしては、例えば「プロジェクター」があげられる。プロジェクターは、床置きで使用する場合と、天上に取り付ける場合があり、「プロジェクター」に液循環型冷却装置を搭載する場合には、この姿勢の変化（天地逆転）に対応することが要求される。   Thus, for example, a “projector” is an example of a case where the installation state during use of the electronic device is reversed upside down. The projector may be used on the floor or mounted on the top. When a liquid circulation type cooling device is installed in the “projector”, it is required to cope with this change in posture (upside down). .

従って、本発明の目的は、電子機器に搭載された場合にその電子機器の天地逆転設置を可能とする液循環型冷却装置を提供することにある。   Accordingly, an object of the present invention is to provide a liquid circulation type cooling device that enables the electronic device to be installed upside down when mounted on the electronic device.

前記の目的を達成するため、本発明の液循環型冷却装置は、系内で液体を循環させる液循環系を構成すると共に、発熱体から発生する熱を前記液体を介して放熱スペースに移送して放熱する液循環型冷却装置において、前記放熱スペースの上流側と下流側に前記液体を貯えるリザーブタンクをそれぞれ設け、前記装置の運転中に下流側に該当するリザーブタンクの液体排出口を常に前記液体で満たすようにしたことを特徴とする。   In order to achieve the above object, the liquid circulation type cooling device of the present invention constitutes a liquid circulation system for circulating the liquid in the system, and transfers heat generated from the heating element to the heat radiation space via the liquid. In the liquid circulation type cooling device that dissipates heat, a reserve tank for storing the liquid is provided on the upstream side and the downstream side of the heat dissipation space, respectively, and the liquid discharge port of the reserve tank corresponding to the downstream side is always provided during the operation of the device. It is characterized by being filled with liquid.

また、前記の目的を達成するため、本発明の液循環型冷却装置は、系内で液体を循環させる液循環系を構成すると共に、発熱体から発生する熱を前記液体を介して放熱スペースに移送して放熱する液循環型冷却装置において、前記放熱スペースに、コア部と該コア部の垂直方向の上下にそれぞれ設けられたリザーブタンク部とを有する熱交換器を設け、前記装置の運転中に前記コア部の下流側に位置するリザーブタンクの液体排出口を常に前記液体で満たすようにしたことを特徴とする。   In order to achieve the above object, the liquid circulation type cooling device of the present invention constitutes a liquid circulation system for circulating the liquid in the system, and heat generated from the heating element is radiated to the heat radiation space via the liquid. In the liquid circulation type cooling device for transferring and dissipating heat, the heat dissipating space is provided with a heat exchanger having a core portion and reserve tank portions respectively provided above and below in the vertical direction of the core portion, during operation of the device Further, the liquid discharge port of the reserve tank located on the downstream side of the core portion is always filled with the liquid.

前記の液循環型冷却装置において、前記コア部の上流側に位置するリザーブタンクの液体導入口を常に前記液体で満たすようにすることもできる。   In the liquid circulation type cooling device, the liquid inlet of the reserve tank located on the upstream side of the core portion can be always filled with the liquid.

更に、前記の目的を達成するため、本発明の液循環型冷却装置は、系内で液体を循環させる液循環系を構成すると共に、発熱体から発生する熱を前記液体を介して放熱スペースに移送して放熱する液循環型冷却装置において、前記放熱スペースに、コア部と該コア部の水平方向の左右にそれぞれ設けられたリザーブタンク部とを有する熱交換器を設け、前記装置の運転中に前記コア部の下流側に位置するリザーブタンクの液体排出口を常に前記液体で満たすようにしたことを特徴とする。   Furthermore, in order to achieve the above object, the liquid circulation type cooling device of the present invention constitutes a liquid circulation system for circulating the liquid in the system, and heat generated from the heating element is radiated to the heat radiation space via the liquid. In the liquid circulation type cooling device for transferring and dissipating heat, the heat dissipating space is provided with a heat exchanger having a core portion and reserve tank portions respectively provided on the left and right in the horizontal direction of the core portion, and the device is in operation. Further, the liquid discharge port of the reserve tank located on the downstream side of the core portion is always filled with the liquid.

前記の液循環型冷却装置において、前記コア部の上流側に位置するリザーブタンクの液体導入口を常に前記液体で満たすようにすることもできる。   In the liquid circulation type cooling device, the liquid inlet of the reserve tank located on the upstream side of the core portion can be always filled with the liquid.

前記熱交換器として、チューブ、フィン、及びヘッダーからなる「コルゲーテッドストレートフィンコア」型構造の熱交換器を用い、前記ヘッダーがリザーブタンクを兼ねるようにすることもできる。   As the heat exchanger, a heat exchanger having a “corrugated straight fin core” type structure including tubes, fins, and a header may be used, and the header may also serve as a reserve tank.

前記熱交換器の外部に、該熱交換器を強制冷却するファンを設けることもできる。   A fan for forcibly cooling the heat exchanger may be provided outside the heat exchanger.

本発明の液循環型冷却装置では、放熱スペースの上流側と下流側に液体を貯えるリザーブタンクをそれぞれ設けて、装置の運転中に、少なくとも下流側に該当するリザーブタンクの液体排出口を常に液体で満たすような構成としているので、天地逆転設置においても、空気がリザーブタンク以外の系内に流入することを防止できる。このため、電子機器の天地逆転設置が可能となり、液循環型冷却装置の適用範囲を広げることが可能となる。   In the liquid circulation type cooling device of the present invention, reserve tanks for storing liquid are provided on the upstream side and the downstream side of the heat radiation space, respectively, and the liquid discharge port of the reserve tank corresponding to at least the downstream side is always liquid during the operation of the device. Therefore, air can be prevented from flowing into the system other than the reserve tank even in the upside down installation. For this reason, the electronic device can be installed upside down, and the application range of the liquid circulation type cooling device can be expanded.

（第１の実施の形態）
図１は、本発明の第１の実施の形態に係る液循環型冷却装置の回路を示す概略図である。この液循環型冷却装置１０は、水等の液体を循環させる循環ポンプ１１、放熱スペースに配置し機器筐体外に熱を放熱する熱交換器１２、発熱素子等の被冷却物に接続し被冷却物から効率良く熱を液体に伝える受熱体１３、各部材間を連結し、フレキシブルチューブまたは固定配管からなる配管１４及び熱交換器１２に風を与え強制空冷を行うファン１５を備えている。 (First embodiment)
FIG. 1 is a schematic diagram showing a circuit of a liquid circulation type cooling device according to the first embodiment of the present invention. This liquid circulation type cooling device 10 is connected to an object to be cooled such as a circulation pump 11 that circulates a liquid such as water, a heat exchanger 12 that is disposed in a heat radiating space and dissipates heat outside the equipment housing, and is cooled A heat receiving body 13 that efficiently transfers heat from an object to a liquid, a member 14 that connects each member, a pipe 14 that is a flexible tube or a fixed pipe, and a fan 15 that performs forced air cooling by supplying air to the heat exchanger 12 are provided.

熱交換器１２は、コア部１８、該コア部１８の図中垂直方向上方に形成されるリザーブタンク部１６、及び前記コア部１８の図中下方に形成されるリザーブタンク部１７からなり、これらは一体化して形成されている。リザーブタンク部１６及びリザーブタンク部１７は内部に同容量の空間を有している。リザーブタンク部１７内の全空間には液体が満たされているが、リザーブタンク部１６内には、液体１６Ａ及び空気層１６Ｂを有している。   The heat exchanger 12 includes a core portion 18, a reserve tank portion 16 formed above the core portion 18 in the vertical direction in the figure, and a reserve tank portion 17 formed below the core portion 18 in the figure. Are integrally formed. The reserve tank section 16 and the reserve tank section 17 have a space of the same capacity inside. The entire space in the reserve tank portion 17 is filled with liquid, but the reserve tank portion 16 has a liquid 16A and an air layer 16B.

図２は、熱交換器１２の拡大図であり、（ａ）は側面図、（ｂ）は正面図である。この熱交換器１２は、「コルゲーテッドストレートフィンコア」型構造の熱交換器を用いており、コア部１８と、コア部１８の図中上側に設けられるリザーブタンク部１６と、コア部１８の下側に設けられるリザーブタンク部１７とからなっている。   2 is an enlarged view of the heat exchanger 12, (a) is a side view, and (b) is a front view. The heat exchanger 12 uses a “corrugated straight fin core” type heat exchanger, and includes a core portion 18, a reserve tank portion 16 provided on the upper side of the core portion 18 in the figure, It consists of a reserve tank portion 17 provided on the lower side.

コア部１８は、放熱性に優れるアルミニウム等の金属によって形成される襞状のフィン１２１をアルミニウム等の金属からなる扁平状のチューブ１２２にろう付けすることによって一体化された「コルゲーテッドストレートフィンコア」を用いている。   The core portion 18 is an “corrugated straight fin core integrated by brazing a fin-shaped fin 121 formed of a metal such as aluminum having excellent heat dissipation performance to a flat tube 122 made of a metal such as aluminum. Is used.

また、リザーブタンク部１６及びリザーブタンク部１７は、「コルゲーテッドストレートフィンコア」型構造の熱交換器における上下ヘッダー両方を用いて、これらを共にリザーブタンクとして必要な容量となるようなサイズに形成されている。   In addition, the reserve tank section 16 and the reserve tank section 17 are formed in a size that uses both the upper and lower headers in the heat exchanger of the “corrugated straight fin core” type structure so that both of them have a necessary capacity as a reserve tank. Has been.

リザーブタンク部１６及びリザーブタンク部１７は、内部に同容積の空間を有している。また、リザーブタンク部１６には、その底面側に、液体が流入、排出可能となる液循環口１２３が設けられ、リザーブタンク部１７にも、その上面側に同様の液循環口１２４が形成されている。これらの液循環口１２３、１２４は、図１で示した配管１４と接続できるようになっている。
更に、リザーブタンク部１６の側方には、液体の注入やエアの圧力調整のための注入・エア抜きノズル１２５が設けられている。 The reserve tank section 16 and the reserve tank section 17 have a space of the same volume inside. The reserve tank portion 16 is provided with a liquid circulation port 123 on the bottom surface side through which liquid can flow in and out, and the reserve tank portion 17 is also provided with a similar liquid circulation port 124 on the upper surface side thereof. ing. These liquid circulation ports 123 and 124 can be connected to the pipe 14 shown in FIG.
Further, an injection / bleeding nozzle 125 for injecting liquid and adjusting air pressure is provided on the side of the reserve tank section 16.

リザーブタンク部１６及びリザーブタンク部１７内部の容積は、系全体の容積と液温度上昇時の体積増加に伴う内圧増加量を吸収するための空気量、および系全体の液体分損失量(液体透過量)により決定する。また、注入・エア抜きノズル１２５は液体の注入時以外には塞がれている。   The internal volume of the reserve tank unit 16 and the reserve tank unit 17 includes the volume of the entire system, the amount of air for absorbing the increase in internal pressure accompanying the increase in volume when the liquid temperature rises, and the amount of liquid component loss (liquid permeation) of the entire system. Determine by quantity). The injection / bleeding nozzle 125 is closed except when liquid is injected.

以下、図１及び図２を参照しつつ、液循環型冷却装置１０の動作を説明する。 Hereinafter, the operation of the liquid circulation type cooling apparatus 10 will be described with reference to FIGS. 1 and 2.

まず、図１において、液循環ポンプ１１を駆動すると、液循環系に満たされている液体が圧送される。受熱体１３は、被冷却物となる発熱体から熱伝導する熱を液体に伝熱する。液体は、配管１４を介して熱交換器１２に圧送される。図２（ａ）に示すように、熱交換器１２において、リザーブタンク部１６に設けられた液循環口１２３から液体が流入されると、液体はリザーブタンク部１６を経由してコア部１８を通過する。コア部１８では、図２（ｂ）に示すように、液体がチューブ１２２を通過する際に、チューブ１２２と一体化されているフィン１２１から放熱する。熱交換器１２には、ファン１５（図１参照）によって空気が送り込まれ、フィン１２１からの放熱が促進される。リザーブタンク部１７に送られた液体は、液循環口１２４から流出し、配管１４を介して液循環ポンプ１１に送られる（図１参照）。この一連の流れにおいて、液循環系は、液体が被冷却物の熱を受けて温度上昇することにより内部圧力が増大するが、リザーブタンク部１６内の空気層１６Ｂがバンパーとして圧力上昇分が吸収される。   First, in FIG. 1, when the liquid circulation pump 11 is driven, the liquid filled in the liquid circulation system is pumped. The heat receiving body 13 transfers the heat conducted from the heating element, which is an object to be cooled, to the liquid. The liquid is pumped to the heat exchanger 12 through the pipe 14. As shown in FIG. 2A, in the heat exchanger 12, when a liquid flows in from the liquid circulation port 123 provided in the reserve tank unit 16, the liquid passes through the reserve tank unit 16 and passes through the core unit 18. pass. In the core portion 18, as shown in FIG. 2B, when the liquid passes through the tube 122, heat is radiated from the fins 121 integrated with the tube 122. Air is sent to the heat exchanger 12 by a fan 15 (see FIG. 1), and heat dissipation from the fins 121 is promoted. The liquid sent to the reserve tank unit 17 flows out from the liquid circulation port 124 and is sent to the liquid circulation pump 11 through the pipe 14 (see FIG. 1). In this series of flows, in the liquid circulation system, the internal pressure increases as the liquid rises in temperature due to the heat of the object to be cooled, but the air layer 16B in the reserve tank portion 16 absorbs the pressure increase as a bumper. Is done.

次に、この液循環型冷却装置１０を天地逆転して配置した場合の動作について、図３を参照しつつ説明する。   Next, the operation when the liquid circulation type cooling device 10 is arranged upside down will be described with reference to FIG.

図３は、第１の実施の形態に係る液循環型冷却装置１０を天地逆転して配置した場合の回路を示す概略図である。この場合、液循環ポンプ１１を駆動すると、液循環系に満たされている液体が矢印の方向へ圧送され、受熱体１３において、被冷却物となる発熱体から熱伝導する熱が伝熱される。液体は、配管１４を介して熱交換器１２のリザーブタンク部１６に圧送され、コア部１８を通過する際に放熱され、リザーブタンク部１７を介して液循環ポンプ１１に送られる。   FIG. 3 is a schematic diagram showing a circuit when the liquid circulation type cooling device 10 according to the first embodiment is arranged upside down. In this case, when the liquid circulation pump 11 is driven, the liquid filled in the liquid circulation system is pumped in the direction of the arrow, and in the heat receiving body 13 heat transferred from the heat generating body that is the object to be cooled is transferred. The liquid is pumped to the reserve tank portion 16 of the heat exchanger 12 via the pipe 14, dissipated when passing through the core portion 18, and is sent to the liquid circulation pump 11 via the reserve tank portion 17.

このように、図３では、コア部１８の上方にリザーブタンク部１７が位置することになり、コア部１８からリザーブタンク部１７を経由して循環ポンプ１１へ液体が流れることになる。この際、リザーブタンク部１７内では液体１７Ａの上部に空気層１７Ｂが存在しているが、液体の排出口（図２の液循環口１２４）が液体で満たされているので、リザーブタンク部１７の下流側の配管１４に流れる際に、空気が配管１４に流入することがない。このため、液循環型冷却装置１０を天地逆転した場合においても、配管１４に空気が混入することがなく、液体の循環性の低下に伴う流量低下やポンプ停止等を防止することができる。   As described above, in FIG. 3, the reserve tank portion 17 is positioned above the core portion 18, and the liquid flows from the core portion 18 to the circulation pump 11 via the reserve tank portion 17. At this time, the air layer 17B exists above the liquid 17A in the reserve tank unit 17, but since the liquid discharge port (liquid circulation port 124 in FIG. 2) is filled with the liquid, the reserve tank unit 17 The air does not flow into the pipe 14 when flowing into the pipe 14 on the downstream side. For this reason, even when the liquid circulation type cooling device 10 is turned upside down, air is not mixed into the pipe 14, and it is possible to prevent a decrease in flow rate, a pump stop, and the like due to a decrease in liquid circulation.

上述の第１の実施の形態の液循環型冷却装置１０によると、以下の効果が得られる。
（１）リザーブタンク部１６及びリザーブタンク部１７において、それぞれのコア部１８側の面に、液循環口１２３、１２４を設けているので、搭載する電子機器の天地が逆転した場合にも常に液循環口１２３、１２４が液体で満たされることになり、配管１４に空気が混入することがなく、液体の循環性の低下に伴う流量低下やポンプ停止等を防止することができる。
（２）熱交換器１２として、「コルゲーテッドストレートフィンコア」型構造の熱交換器を用い、上下ヘッダー部分がリザーブタンクを兼ねることとしているので、個別にリザーブタンクを複数設けなくてもチューブ１２２を常に冷却液で満たすことができる。このため、液循環回路の構成を簡素化でき、部品増加及び搭載スペースの増加を抑え、良好な放熱性を確保しながら電子機器の小型化、低コスト化を実現できる。
（３）放熱器１２のリザーブタンク部１６、１７に液循環系の圧力上昇分を吸収する空気層１６Ｂ、１７Ｂを設けたため、液循環系中の液体の温度変化に伴う圧力上昇を吸収することができる。 According to the liquid circulation cooling device 10 of the first embodiment described above, the following effects are obtained.
(1) In the reserve tank section 16 and the reserve tank section 17, since the liquid circulation ports 123 and 124 are provided on the respective surfaces of the core section 18, the liquid is always liquid even when the top and bottom of the electronic equipment to be mounted is reversed. Since the circulation ports 123 and 124 are filled with the liquid, air is not mixed into the pipe 14, and a decrease in flow rate and a pump stop associated with a decrease in the circulation of the liquid can be prevented.
(2) Since a heat exchanger having a “corrugated straight fin core” type structure is used as the heat exchanger 12 and the upper and lower header portions also serve as reserve tanks, the tubes 122 can be provided without providing a plurality of reserve tanks individually. Can always be filled with coolant. For this reason, the configuration of the liquid circulation circuit can be simplified, the increase in parts and mounting space can be suppressed, and the electronic device can be reduced in size and cost while ensuring good heat dissipation.
(3) Since the air tanks 16B and 17B for absorbing the pressure increase in the liquid circulation system are provided in the reserve tank portions 16 and 17 of the radiator 12, the pressure increase accompanying the temperature change of the liquid in the liquid circulation system is absorbed. Can do.

（第２の実施の形態）
図４は、本発明の第２の実施の形態に係る液循環型冷却装置の回路を示す概略図である。この液循環型冷却装置２０は、液体を循環させる循環ポンプ２１、放熱スペースに配置し機器筐体外に熱を放熱する熱交換器２２、発熱素子等の被冷却物に接続し被冷却物から効率良く熱を液体に伝える受熱体２３、各部材間を連結し、フレキシブルチューブまたは固定配管からなる配管２４及び熱交換器２２に風を与え強制空冷を行うファン２５を備えている。 (Second Embodiment)
FIG. 4 is a schematic diagram showing a circuit of a liquid circulation type cooling device according to the second embodiment of the present invention. This liquid circulation type cooling device 20 is connected to an object to be cooled such as a circulation pump 21 that circulates a liquid, a heat exchanger 22 that dissipates heat outside the equipment housing, and a heat-generating element, etc. A heat receiving body 23 that well transfers heat to the liquid, a member 25 that connects each member, and a fan 24 that performs forced air cooling by supplying air to the pipe 24 and the heat exchanger 22 made of a flexible tube or a fixed pipe.

熱交換器２２は、コア部１８、該コア部１８の図中左側に形成されるリザーブタンク部２６、及び前記コア部１８の図中右側に形成されるリザーブタンク部２７からなり、これらは一体化して形成されている。リザーブタンク部２６及びリザーブタンク部２７は内部に同容量の空間を有している。リザーブタンク部２６内には、液体２６Ａ及び空気層２６Ｂを有しており、リザーブタンク部２７内には、液体２７Ａ及び空気層２７Ｂを有している。   The heat exchanger 22 includes a core portion 18, a reserve tank portion 26 formed on the left side of the core portion 18 in the drawing, and a reserve tank portion 27 formed on the right side of the core portion 18 in the drawing. Formed. The reserve tank section 26 and the reserve tank section 27 have the same capacity space inside. The reserve tank section 26 has a liquid 26A and an air layer 26B, and the reserve tank section 27 has a liquid 27A and an air layer 27B.

図５は、熱交換器２２の拡大図であり、（ａ）は側面図、（ｂ）は平面図である。この熱交換器２２は、「コルゲーテッドストレートフィンコア」型構造の熱交換器を用いており、コア部１８と、コア部１８の図中左側に設けられるリザーブタンク部２６と、コア部１８の右側に設けられるリザーブタンク部２７とからなっている。   FIG. 5 is an enlarged view of the heat exchanger 22, wherein (a) is a side view and (b) is a plan view. The heat exchanger 22 uses a “corrugated straight fin core” type heat exchanger, and includes a core portion 18, a reserve tank portion 26 provided on the left side of the core portion 18 in the drawing, It consists of a reserve tank portion 27 provided on the right side.

コア部１８は、第１の実施の形態の装置１０と同様に形成されている。   The core unit 18 is formed in the same manner as the device 10 of the first embodiment.

リザーブタンク部２６及びリザーブタンク部２７は、内部に同容積の空間を有している。また、リザーブタンク部２６には、その右側のコア部１８側に、液体が流入、排出可能となる液循環口２２３が設けられ、リザーブタンク部２７には、その左側のコア部１８側に同様の液循環口２２４が形成されている。これらの液循環口２２３、２２４は、図４で示した配管２４と接続できるようになっている。更に、リザーブタンク部２６には、液体の注入やエアの圧力調整のための注入・エア抜きノズル２２５が設けられている。   The reserve tank part 26 and the reserve tank part 27 have a space of the same volume inside. Further, the reserve tank 26 is provided with a liquid circulation port 223 through which liquid can flow in and out on the right core 18 side, and the reserve tank 27 is similarly provided on the left core 18 side. The liquid circulation port 224 is formed. These liquid circulation ports 223 and 224 can be connected to the pipe 24 shown in FIG. Furthermore, the reserve tank section 26 is provided with an injection / bleeding nozzle 225 for injecting liquid and adjusting air pressure.

以下、図４及び図５を参照しつつ、液循環型冷却装置２０の動作を説明する。 Hereinafter, the operation of the liquid circulation type cooling device 20 will be described with reference to FIGS. 4 and 5.

まず、図４において、液循環ポンプ２１を駆動すると、液循環系に満たされている液体が圧送される。受熱体２３は、被冷却物となる発熱体から熱伝導する熱を液体に伝熱する。液体は、配管２４を介して熱交換器２２に圧送される。図５（ａ）に示すように、熱交換器２２において、リザーブタンク部２７に設けられた液循環口２２４から液体が流入されると、液体はリザーブタンク部２７を経由してコア部１８を通過する。コア部１８では、図５（ｂ）に示すように、液体がチューブ１２２を通過する際に、チューブ１２２と一体化されているフィン１２１から放熱する。熱交換器２２には、ファン２５（図４参照）によって空気が送り込まれ、フィン１２１からの放熱が促進される。リザーブタンク２６に送られた液体は、液循環口２２４から流出し、配管２４を介して液循環ポンプ２１に送られる（図４参照）。   First, in FIG. 4, when the liquid circulation pump 21 is driven, the liquid filled in the liquid circulation system is pumped. The heat receiving body 23 transfers the heat conducted from the heat generating body as the object to be cooled to the liquid. The liquid is pumped to the heat exchanger 22 via the pipe 24. As shown in FIG. 5 (a), in the heat exchanger 22, when the liquid flows in from the liquid circulation port 224 provided in the reserve tank unit 27, the liquid passes through the reserve tank unit 27 and passes through the core unit 18. pass. In the core part 18, as shown in FIG. 5B, when the liquid passes through the tube 122, heat is radiated from the fins 121 integrated with the tube 122. Air is fed into the heat exchanger 22 by a fan 25 (see FIG. 4), and heat dissipation from the fins 121 is promoted. The liquid sent to the reserve tank 26 flows out from the liquid circulation port 224 and is sent to the liquid circulation pump 21 via the pipe 24 (see FIG. 4).

次に、この液循環型冷却装置２０を天地逆転して配置した場合の動作について、図６を参照しつつ説明する。
図６は、第２の実施の形態に係る液循環型冷却装置２０を天地逆転して配置した場合の回路を示す概略図である。この場合、液循環ポンプ２１を駆動すると、液循環系に満たされている液体が矢印の方向へ圧送され、受熱体２３において、被冷却物となる発熱体から熱伝導する熱が伝熱される。液体は、配管２４を介して熱交換器２２のリザーブタンク部２７に圧送され、コア部１８を通過する際に放熱され、リザーブタンク２６を介して循環ポンプ２１に送られる。 Next, the operation when the liquid circulation type cooling device 20 is arranged upside down will be described with reference to FIG.
FIG. 6 is a schematic diagram showing a circuit when the liquid circulation type cooling device 20 according to the second embodiment is arranged upside down. In this case, when the liquid circulation pump 21 is driven, the liquid filled in the liquid circulation system is pumped in the direction of the arrow, and in the heat receiving body 23 heat transferred from the heat generating body to be cooled is transferred. The liquid is pumped to the reserve tank portion 27 of the heat exchanger 22 through the pipe 24, is radiated when passing through the core portion 18, and is sent to the circulation pump 21 through the reserve tank 26.

このように、図６では、コア部１８からリザーブタンク部２６を経由して循環ポンプ２１へ液体が流れることになる。この際、リザーブタンク部２６内では液体２６Ａの上部に空気層２６Ｃが存在しているが、液体の排出口（図５の液循環口２２３）が液体で満たされているので、リザーブタンク部２６の下流側の配管２４に流れる際に、空気が配管２４に流入することがない。このため、液循環型冷却装置２０を天地逆転した場合においても、配管２４に空気が混入することがなく、液体の循環性の低下に伴う流量低下やポンプ停止等を防止することができる。   As described above, in FIG. 6, the liquid flows from the core portion 18 to the circulation pump 21 via the reserve tank portion 26. At this time, the air layer 26C exists above the liquid 26A in the reserve tank 26, but the liquid discharge port (the liquid circulation port 223 in FIG. 5) is filled with the liquid. The air does not flow into the pipe 24 when flowing into the pipe 24 on the downstream side. For this reason, even when the liquid circulation type cooling device 20 is turned upside down, air is not mixed into the pipe 24, and a flow rate drop or a pump stop associated with a decrease in the liquid circulation property can be prevented.

上述の第２の実施の形態の液循環型冷却装置２０においても、第１の実施の形態の液循環型冷却装置１０と同様の効果が得られる。   Also in the liquid circulation type cooling device 20 of the second embodiment described above, the same effect as the liquid circulation type cooling device 10 of the first embodiment can be obtained.

（第３の実施の形態）
図７は、第３の実施形態の液循環型冷却装置に用いられる熱交換器３２の構成を示す図であり、（ａ）は側面図、（ｂ）は平面図である。 (Third embodiment)
FIG. 7 is a diagram showing a configuration of the heat exchanger 32 used in the liquid circulation type cooling device of the third embodiment, where (a) is a side view and (b) is a plan view.

この熱交換器３２は、「コルゲーテッドストレートフィンコア」型構造の熱交換器を用いており、コア部１８と、コア部１８の図中左側に設けられるリザーブタンク部３６と、コア部１８の右側に設けられるリザーブタンク部３７とからなっている。   The heat exchanger 32 uses a heat exchanger of a “corrugated straight fin core” type structure, and includes a core portion 18, a reserve tank portion 36 provided on the left side of the core portion 18 in the drawing, It consists of a reserve tank part 37 provided on the right side.

この熱交換器３２では、リザーブタンク部３６の側面側に、液体が流入、排出可能となる液循環口３２３が設けられ、リザーブタンク３７の側面側に、同様の液循環口３２４が形成され、リザーブタンク部３６の上方に、液体の注入やエアの圧力調整のための注入・エア抜きノズル３２５が設けられている以外は、熱交換器２２と同様の構成を有している。この熱交換器３２を図４に示す液循環型冷却装置の熱交換器２２の代わりに用いることによって、第２の実施例の液循環型冷却装置２０と同様の効果を奏することができる。   In this heat exchanger 32, a liquid circulation port 323 through which liquid can flow in and out is provided on the side surface side of the reserve tank section 36, and a similar liquid circulation port 324 is formed on the side surface side of the reserve tank 37. It has the same configuration as the heat exchanger 22 except that an injection / bleeding nozzle 325 for injecting liquid and adjusting air pressure is provided above the reserve tank 36. By using this heat exchanger 32 in place of the heat exchanger 22 of the liquid circulation type cooling device shown in FIG. 4, the same effects as those of the liquid circulation type cooling device 20 of the second embodiment can be obtained.

なお、上記した実施の形態では、熱交換器内にリザーブタンク部を２つ設ける構成としたが、３つ以上設ける構成としても良い。また、コア部１８を空気の通過方向に１層とした構成を説明したが、放熱量に応じて２層あるいは２層以上で形成しても良い。更に、冷却液のリザーブタンクを別個に設けない構成としたが、液循環系に個別に設けることも可能である。   In the above-described embodiment, two reserve tank portions are provided in the heat exchanger. However, three or more reserve tank portions may be provided. Moreover, although the structure which made the core part 18 1 layer in the passage direction of air was demonstrated, you may form in 2 layers or 2 layers or more according to the amount of heat radiation. Further, the cooling liquid reserve tank is not provided separately, but it is also possible to provide it separately in the liquid circulation system.

また、リザーブタンク部に液位センサを設けることで、リザーブタンク内の冷却液が減少した場合に警報を出して冷却液の補充ができるようにすることもできる。   In addition, by providing a liquid level sensor in the reserve tank unit, it is possible to issue an alarm when the coolant in the reserve tank has decreased, so that the coolant can be replenished.

本発明の第１の実施の形態に係る液循環型冷却装置の回路を示す概略図である。It is the schematic which shows the circuit of the liquid circulation type cooling device which concerns on the 1st Embodiment of this invention. 本発明の第１の実施の形態に係る液循環型冷却装置に用いられる熱交換器の拡大図であり、（ａ）は側面図、（ｂ）は正面図である。It is an enlarged view of the heat exchanger used for the liquid circulation type cooling device concerning a 1st embodiment of the present invention, (a) is a side view and (b) is a front view. 本発明の第１の実施の形態に係る液循環型冷却装置を天地逆転して配置した場合の回路を示す概略図である。It is the schematic which shows the circuit at the time of arrange | positioning the liquid circulation type cooling device which concerns on the 1st Embodiment of this invention upside down. 本発明の第２の実施の形態に係る液循環型冷却装置の回路を示す概略図である。It is the schematic which shows the circuit of the liquid circulation type cooling device which concerns on the 2nd Embodiment of this invention. 本発明の第２の実施の形態に係る液循環型冷却装置に用いられる熱交換器の拡大図であり、（ａ）は側面図、（ｂ）は正面図である。It is an enlarged view of the heat exchanger used for the liquid circulation type cooling device which concerns on the 2nd Embodiment of this invention, (a) is a side view, (b) is a front view. 本発明の第２の実施の形態に係る液循環型冷却装置を天地逆転して配置した場合の回路を示す概略図である。It is the schematic which shows the circuit at the time of arrange | positioning the liquid circulation type cooling device which concerns on the 2nd Embodiment of this invention upside down. 本発明の第３の実施の形態に係る液循環型冷却装置に用いられる熱交換器の拡大図であり、（ａ）は側面図、（ｂ）は平面図である。It is an enlarged view of the heat exchanger used for the liquid circulation type cooling device which concerns on the 3rd Embodiment of this invention, (a) is a side view, (b) is a top view. 従来の液循環型冷却装置の回路を示す概略図である。It is the schematic which shows the circuit of the conventional liquid circulation type cooling device. 従来の液循環型冷却装置を天地逆転した場合の回路を示す概略図である。It is the schematic which shows the circuit at the time of upside down the conventional liquid circulation type cooling device.

符号の説明Explanation of symbols

１０，２０，５０ 液循環型冷却装置
１１，２１，５１ 循環ポンプ
１２，２２ 熱交換器、５２ 放熱器
１３，２３，５３ 受熱体
１４，２４，５４ 配管
１５，２５，５５ ファン
１６，１７，２６，２７ リザーブタンク部
１６Ａ，１７Ａ，２６Ａ，２７Ａ，５６Ａ 液体
１６Ｂ，１７Ｂ，２６Ｂ，２７Ｂ，５６Ｂ 空気層
２６Ｃ，２７Ｃ 空気層
１８ コア部、
５６ リザーブタンク、５７ ヘッダー
１２１ フィン、１２２ チューブ
１２３，２２３，３２３ 液循環口
１２４，２２４，３２４ 液循環口
１２５，２２５，３２５ 注入・エア抜きノズル 10, 20, 50 Liquid circulation type cooling device 11, 21, 51 Circulation pump 12, 22 Heat exchanger, 52 Radiator 13, 23, 53 Heat receiving body 14, 24, 54 Piping 15, 25, 55 Fan 16, 17, 26, 27 Reserve tank portion 16A, 17A, 26A, 27A, 56A Liquid 16B, 17B, 26B, 27B, 56B Air layer 26C, 27C Air layer 18 Core portion,
56 Reservation tank, 57 Header 121 Fin, 122 Tube 123, 223, 323 Liquid circulation port 124, 224, 324 Liquid circulation port 125, 225, 325 Injection / bleeding nozzle

Claims (5)

系内で液体を循環させる液循環系を構成すると共に、発熱体から発生する熱を前記液体を介して放熱スペースに移送して放熱する液循環型冷却装置において、前記放熱スペースの上流側と下流側に前記液体を貯えるリザーブタンクをそれぞれ設け、前記装置の運転中に下流側に該当するリザーブタンクの液体排出口を常に前記液体で満たすようにしたことを特徴とする液循環型冷却装置。   In a liquid circulation type cooling device that constitutes a liquid circulation system that circulates liquid in the system and that dissipates heat by transferring heat generated from a heating element to the heat radiation space via the liquid, upstream and downstream of the heat radiation space A liquid circulation type cooling device, wherein a reserve tank for storing the liquid is provided on each side, and a liquid discharge port of a reserve tank corresponding to the downstream side is always filled with the liquid during operation of the device. 系内で液体を循環させる液循環系を構成すると共に、発熱体から発生する熱を前記液体を介して放熱スペースに移送して放熱する液循環型冷却装置において、前記放熱スペースに、コア部と該コア部の垂直方向の上下にそれぞれ設けられたリザーブタンク部とを有する熱交換器を設け、前記装置の運転中に前記コア部の下流側に位置するリザーブタンクの液体排出口を常に前記液体で満たすようにしたことを特徴とする液循環型冷却装置。   In the liquid circulation type cooling device that constitutes a liquid circulation system that circulates liquid in the system and transfers heat generated by the heating element to the heat radiation space through the liquid to dissipate heat, the heat radiation space includes a core portion and A heat exchanger having a reserve tank portion provided respectively above and below the core portion in the vertical direction, and the liquid discharge port of the reserve tank located downstream of the core portion during operation of the device always has the liquid A liquid circulation type cooling device characterized by satisfying the above. 系内で液体を循環させる液循環系を構成すると共に、発熱体から発生する熱を前記液体を介して放熱スペースに移送して放熱する液循環型冷却装置において、前記放熱スペースに、コア部と該コア部の水平方向の左右にそれぞれ設けられたリザーブタンク部とを有する熱交換器を設け、前記装置の運転中に前記コア部の下流側に位置するリザーブタンクの液体排出口を常に前記液体で満たすようにしたことを特徴とする液循環型冷却装置。   In the liquid circulation type cooling device that constitutes a liquid circulation system that circulates liquid in the system and transfers heat generated by the heating element to the heat radiation space through the liquid to dissipate heat, the heat radiation space includes a core portion and A heat exchanger having reserve tank portions provided on the left and right sides of the core portion in the horizontal direction, and the liquid discharge port of the reserve tank located downstream of the core portion during operation of the apparatus always has the liquid A liquid circulation type cooling device characterized by satisfying the above. 前記熱交換器として、チューブ、フィン、及びヘッダーからなる「コルゲーテッドストレートフィンコア」型構造の熱交換器を用い、前記ヘッダーがリザーブタンクを兼ねるようにしたことを特徴とする請求項２又は３記載の液循環型冷却装置。   4. The heat exchanger having a “corrugated straight fin core” type structure including a tube, a fin, and a header is used as the heat exchanger, and the header also serves as a reserve tank. 5. The liquid circulation type cooling device described. 前記熱交換器の外部に、該熱交換器を強制冷却するファンを設けたことを特徴とする請求項２乃至４のいずれか１項記載の液循環型冷却装置。   The liquid circulation type cooling device according to any one of claims 2 to 4, wherein a fan for forcibly cooling the heat exchanger is provided outside the heat exchanger.
JP2004033761A 2004-02-10 2004-02-10 Liquid circulation type cooling system Expired - Fee Related JP3897024B2 (en)

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US10/885,005 US20050173097A1 (en) 2004-02-10 2004-07-07 Liquid circulation type cooling system
KR1020040055356A KR100605422B1 (en) 2004-02-10 2004-07-16 Liquid circulation type cooling system
CNB2004100840176A CN100559924C (en) 2004-02-10 2004-10-13 Liquid circulation type cooling system
TW093131471A TW200526913A (en) 2004-02-10 2004-10-15 Liquid circulation type cooling system

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