1339556 九、發明說明： 【發明所屬之技術領域】 本發明涉及熱傳領域’尤其涉及一種液冷式散熱系統 【先前技術】 近年來電子技麟速發展，電子元件之運行頻率及迷度不斷提昇。但是， 同時電子元件產生熱量越來越多’溫度亦越來越高’嚴重麵電子元件運行時 之性能及穩定性’為確《子元件能正常工作，料電子元件進行有效散熱。 #目前風冷式散熱系統廣泛地運用於電子元件散熱中，其-般係通過散熱鲜片將 發熱元件產生之熱量傳導出，再⑽錢处錄騎轉走歸。雖然風冷 式散熱系、統結構簡單，與目前電子元件相容性較好’且成本低廉但因其散熱 原理為空氣鱗流，而空狀贿導鱗魏，賴能力受職制，很難滿足 高頻高速電子元件之餘需求。液冷式散熱系統以其散熱高效、快速等特點， 適合解決目前電子器件因性能提昇所衍生之散熱問題。 液冷式散熱系統一般包括一吸熱單元、散熱單元'工作流體與連接導管’ ♦其中吸熱單元從發熱元件吸收熱量，然後由導管中之工作流體將熱量帶走，最 後通過散熱單元將熱量散發到空氣中。 傳統液冷式散熱系統一般採用純液體作為工作流體，但一般純液體導熱係 數較小，其與吸熱單元、散熱單元及連接導管管壁間熱阻較大，導致液冷式散 熱乐統工作流體不能迅速從吸熱單元吸熱及向散熱單元散熱，從而影響液冷式 散熱系統之散熱效率。 先前技術提供一種液冷式散熱系統，其工作流體爲懸浮液，其包括流體與 1339556 懸浮於該流體中之高導熱性陶瓷粉，體’但傳統之物理製備方式所獲得之此類粉 體之顆粒大小都在微米級以上，雖然能增加工作流體之導熱效率，然較大之 顆粒極易因凡得瓦爾力而發生凝聚，會造成液冷式散熱系統中之導管阻塞為 避免其發生凝聚，通常採用加入表面活性劑來分散、穩定粉體之顆粒，然表面 活性劑於液冷式散熱系統工作時易產生氣泡而阻礙熱傳，從而降低液冷式散熱 系統之散熱效率。 有鑒於此’提供一種具有高散熱效率之液冷式散熱系統實為必要。 【内容】 以下將以實施例說明一種具有高散熱效率之液冷式散熱系統。 為貫現上述内容，提供一種液冷式散熱系統，其包括：一吸熱單元：一散 熱單元；連接所述吸熱單元與散熱單元之連接導管；以及流動於所述吸熱單 元、散熱單元與連接導管中之工作流體，其中所述工作流體包括：一流體；複 數奈米粒子，其分散於所述流體中；及一保護劑，分散於所述流體中，所述奈 米粒子佔液冷式散熱系統工作流體總重量之〇.I%〜3%。 所述散熱單元為散熱器或空氣熱交換器。 所述流體包含水、醇類及酮類之一種或幾種之混合。 所述醇類為甲醇、乙醇、丙醇、正丁醇、正戊醇、正己醇、正庚醇、正辛 醇及乙二醇中之一種或幾種之混合。 所述酮類為丙酮。 所述奈米粒子選自下列材料：金、銀、銅、鋁、氧化銅、氧化鋁、氮化硼、 鼠化紹及氣化辞中之一種或幾種之混合。 7 1339556 - 所述保護劑包括檸檬酸、檸檬酸鹽、單檸醆'聚乙烯醇、聚乙烯基吡咯烷 酮及四級銨鹽之一種或幾種之混合。 所述彳爭樣酸鹽為棒樣酸納或禪樣酸钟之一種或幾種之混人。 所述保護劑之含量為所述奈米粒子總重之〇·〇5〜2倍。 所述奈米粒子之粒徑為1〜500奈米。 本實施方式提供之齡式散m其丄料_分散有奈綠子與保護 劑，由於奈米粒子粒徑很小，而且由於液冷式散熱系統工作流體中有保護劑存 • 在，可防止奈米粒子凝聚，從而可避免液冷式散熱系統中之導管堵塞，且所述 奈米粒子可降低液冷式散熱系統中之吸熱單元及散熱單元與工作流體以及工 作流體内部之熱阻，從而提高液冷式散熱系統之散熱效率。 【實施方式】 下面結合附圖對本技術方案作進一步詳細說明。 請參閱第一圖，本實施方式提供之液冷式散熱系統10，其包括：一吸熱單 元1，一散熱單元2 ,連接所述吸熱單元與散熱單元之連接導管3 ;以及流動於 所述吸熱單7L1、散熱單元2與連接導管3中之工作流體4，其中所述工作流體4 包括：一流體；複數奈米粒子，其分散於所述流體中；及一保護劑，分散於所 述流體中。 其中所述吸熱單元1緊貼於發熱元件5上，用於吸收發熱元件5之熱量。該 吸熱單元1内設一封閉腔室，腔室内儲存有工作液體4。該散熱單元2可為散熱 器或空氣熱交換器等。當液冷式散熱系統工作時，工作液體進入吸熱單元1中 帶走吸熱單元1從發熱元件5上吸收之熱量，通過連接導管3流到散熱單元2中放 8 1339556 出熱量，然後再通過連接導管3流回吸熱單元1，如此循環往復從而達到對發熱 元件5散熱之效果。 其中所述流體包含水、醇類及酮類之一種或幾種之混合，所述醇類為曱 醇、乙醇'丙醇、正丁醇、正戊醇、正己醇、正庚醇、正辛醇及乙二醇中之一 種或幾種之混合，所述酮類為丙酮，本實施例使用之流體為純水。所述奈米粒 子為金、銀、銅、鋁、氧化銅'氧化鋁'氮化硼、氮化鋁及氧化鋅中之一種或 幾種之混合，優選地，使用銅。所述保護劑包括檸檬酸'檸檬酸鹽、單檸酸、 聚乙烯醇、聚乙烯基吡咯烷酮及四級銨鹽之一種或幾種之混合，所述檸檬酸鹽 為檸檬酸鈉或檸檬酸鉀之一種或幾種之混合，本實施例使用之保護劑為聚乙烯 醇。所述奈米粒子佔液冷式散熱系統工作流體總重量之〇1%〜3%，粒徑為1〜5〇〇 奈米’所述保護劑之含量為所述奈米粒子總重之0.05〜2倍。 所述工作流體4可通過化學還原法製得，其包括以下步驟：提供一定化學 计量之金屬離子溶液與還原劑’以及適當之保賴；將所述金雜子溶液、還 原劑以及保護劑混合後發生化學反應；稀釋上述反應後之溶液，即得到所述工 作心祖4。其中所述金屬離子溶液包含四氣金酸、硝酸銀、過氣酸銀、硫酸銅、 亂化銀及顧銅等中之一種錢種之混合，所述還原劑為蝴氫化納、次填酸 納、聯敍、氣化亞錫、鹽酸氫胺、檸樣酸鈉及乙二醇等中之—種錢種之混合。 所述保護劑包括檸樣酸、檸做鹽、單檸酸、聚乙麟、聚乙縣轉細及 四級錢鹽之—種錢種之混合°所述瓣步驟可㈣水、咖及嶋之一種或 幾種之混合’所述醇類為曱醇、乙醇、丙醇、正丁醇、正戊醇、正己醇、正庚 醇、正辛醇及乙二醇中之一種或幾種之混合，所述酮類為丙酮。 9 1339556 本實施方式提供之液冷式散熱.系統，其工作流體4内分散有奈米粒子與保 護劑，由於奈米粒子粒徑很小，在保護劑存在下，可防止奈米粒子凝聚，從而 可避免液冷式散熱系統中之導管中工作流體流動堵塞，且所述奈米粒子具有較 高導熱性能可降錢冷讀熱线巾之賴單元及絲單元與王作流體以及 工作流體内部之熱阻，從而提高液冷式散熱系統之散熱效率。 綜上所述，本發明符合發明專利之要件，纽法提出專獅請。惟，以上 所述者僅為本發明之較佳實施例，自不能以此限制本案之申請專利範圍。舉凡1339556 IX. Description of the invention: [Technical field of the invention] The present invention relates to the field of heat transfer. In particular, it relates to a liquid-cooled heat-dissipating system. [Prior Art] In recent years, the speed of electronic technology has been rapidly developed, and the operating frequency and the fascination of electronic components have been continuously improved. . However, at the same time, the electronic components generate more and more heat, and the temperature is also higher and higher. The performance and stability of the serious surface electronic components during operation are such that the sub-components can work normally and the electronic components are effectively dissipated. #Currently, the air-cooled heat dissipation system is widely used in the heat dissipation of electronic components. The heat generated by the heating elements is transmitted through the heat-dissipating fresh film, and then (10) the money is recorded and returned. Although the air-cooled heat dissipation system and the structure are simple, and the compatibility with the current electronic components is good, and the cost is low, but the principle of heat dissipation is air flow, and the empty bribe guides the scales, the ability to be employed is difficult to satisfy. The need for high-frequency high-speed electronic components. The liquid-cooled heat dissipation system is characterized by its efficient and fast heat dissipation, and is suitable for solving the heat dissipation problem caused by the current performance improvement of electronic devices. The liquid-cooled heat-dissipating system generally includes a heat-absorbing unit, a heat-dissipating unit 'working fluid and a connecting conduit' ♦ wherein the heat-absorbing unit absorbs heat from the heat-generating component, and then the heat is carried away by the working fluid in the conduit, and finally the heat is dissipated through the heat-dissipating unit. in the air. Conventional liquid-cooled heat dissipation systems generally use pure liquid as the working fluid, but generally the pure liquid has a small thermal conductivity, and the thermal resistance between the heat-absorbing unit, the heat-dissipating unit and the wall of the connecting conduit is large, resulting in a liquid-cooled heat-dissipating working fluid. It is not possible to quickly absorb heat from the heat absorbing unit and dissipate heat to the heat sink unit, thereby affecting the heat dissipation efficiency of the liquid cooling heat sink system. The prior art provides a liquid-cooled heat dissipating system, the working fluid of which is a suspension comprising a fluid and a high thermal conductivity ceramic powder suspended in the fluid of 1,339,556, but the powder obtained by the conventional physical preparation method The particle size is above the micron level. Although it can increase the thermal conductivity of the working fluid, the larger particles are easily agglomerated by the van der Waals force, which may cause the conduit in the liquid-cooled heat dissipation system to block to avoid coagulation. Surfactants are usually added to disperse and stabilize the particles of the powder. However, when the liquid-cooling heat-dissipating system works, the surfactant is easy to generate bubbles and hinder heat transfer, thereby reducing the heat dissipation efficiency of the liquid-cooled heat dissipation system. In view of this, it is necessary to provide a liquid-cooled heat dissipation system with high heat dissipation efficiency. [Contents] A liquid-cooled heat dissipation system having high heat dissipation efficiency will be described below by way of example. In order to achieve the above, a liquid cooling heat dissipating system is provided, comprising: a heat absorbing unit: a heat dissipating unit; a connecting duct connecting the heat absorbing unit and the heat dissipating unit; and flowing to the heat absorbing unit, the heat dissipating unit and the connecting duct The working fluid, wherein the working fluid comprises: a fluid; a plurality of nano particles dispersed in the fluid; and a protective agent dispersed in the fluid, the nano particles occupying liquid cooling The total weight of the system working fluid is I.I%~3%. The heat dissipation unit is a radiator or an air heat exchanger. The fluid comprises a mixture of one or more of water, alcohols and ketones. The alcohol is a mixture of one or more of methanol, ethanol, propanol, n-butanol, n-pentanol, n-hexanol, n-heptanol, n-octanol and ethylene glycol. The ketone is acetone. The nanoparticles are selected from the group consisting of gold, silver, copper, aluminum, copper oxide, aluminum oxide, boron nitride, a mixture of ratification and gasification, or a mixture of several. 7 1339556 - The protective agent comprises a mixture of one or more of citric acid, citrate, monomethanol, polyvinyl alcohol, polyvinyl pyrrolidone and a quaternary ammonium salt. The sputum-like acid salt is a mixture of one or more of a rod-like acid or a Zen-like acid clock. The content of the protective agent is 5 to 2 times the total weight of the nanoparticles. The nanoparticle has a particle diameter of from 1 to 500 nm. The embodiment provides an age-type dispersion material, which is dispersed with a green pigment and a protective agent. Since the particle size of the nanoparticle is small, and the protective agent exists in the working fluid of the liquid-cooled heat dissipation system, it can be prevented. The nanoparticles are agglomerated to avoid clogging of the conduit in the liquid-cooled heat dissipation system, and the nano-particles can reduce the thermal resistance of the heat-absorbing unit and the heat-dissipating unit and the working fluid and the inside of the working fluid in the liquid-cooled heat dissipation system, thereby Improve the heat dissipation efficiency of the liquid cooling system. [Embodiment] The technical solution will be further described in detail below with reference to the accompanying drawings. Referring to the first embodiment, the liquid cooling heat dissipation system 10 provided by the embodiment includes: a heat absorption unit 1, a heat dissipation unit 2, a connection conduit 3 connecting the heat absorption unit and the heat dissipation unit; and flowing in the heat absorption a single 7L1, a heat dissipating unit 2 and a working fluid 4 in the connecting conduit 3, wherein the working fluid 4 comprises: a fluid; a plurality of nanoparticles dispersed in the fluid; and a protective agent dispersed in the fluid in. The heat absorbing unit 1 is in close contact with the heat generating component 5 for absorbing heat of the heat generating component 5. The heat absorbing unit 1 is provided with a closed chamber in which a working liquid 4 is stored. The heat sink unit 2 may be a heat sink or an air heat exchanger or the like. When the liquid-cooled heat-dissipating system is in operation, the working liquid enters the heat-absorbing unit 1 and takes away the heat absorbed by the heat-absorbing unit 1 from the heat-generating component 5, and flows through the connecting conduit 3 to the heat-dissipating unit 2 to discharge 8 1339556 heat, and then through the connection. The duct 3 flows back to the heat absorbing unit 1, and is thus reciprocated to achieve the effect of dissipating heat to the heat generating element 5. Wherein the fluid comprises a mixture of one or more of water, alcohols and ketones, the alcohols being decyl alcohol, ethanol 'propanol, n-butanol, n-pentanol, n-hexanol, n-heptanol, n-octyl A mixture of one or more of an alcohol and an ethylene glycol, the ketone being acetone, and the fluid used in the embodiment is pure water. The nanoparticles are a mixture of one or more of gold, silver, copper, aluminum, copper oxide 'alumina' boron nitride, aluminum nitride and zinc oxide. Preferably, copper is used. The protective agent comprises a mixture of one or more of citric acid 'citrate, mono citrate, polyvinyl alcohol, polyvinyl pyrrolidone and a quaternary ammonium salt, the citrate being sodium citrate or potassium citrate A mixture of one or more of them, the protective agent used in this embodiment is polyvinyl alcohol. The nanoparticle accounts for 〇1% to 3% of the total weight of the working fluid of the liquid-cooled heat dissipation system, and the particle diameter is 1 to 5 nanometers. The content of the protective agent is 0.05 of the total weight of the nano particles. ~2 times. The working fluid 4 can be produced by a chemical reduction method, which comprises the steps of: providing a stoichiometric metal ion solution and a reducing agent 'and appropriate protection; mixing the gold hybrid solution, the reducing agent and the protective agent A chemical reaction occurs; the working solution is obtained by diluting the solution after the above reaction. Wherein the metal ion solution comprises a mixture of four kinds of gold, silver nitrate, silver permanate, copper sulfate, chaotic silver and copper, and the reducing agent is a butterfly hydrogenated or sub-sodium , a combination of Liansu, gasified stannous, hydrogenamine hydrochloride, sodium citrate and ethylene glycol. The protective agent comprises a mixture of a lemon-like acid, a lemon salt, a mono-limic acid, a polyethylene, a polyethylation, and a fourth-grade salt. The petal step can be (4) water, coffee and rice. Mixing one or more of the alcohols: one or more of decyl alcohol, ethanol, propanol, n-butanol, n-pentanol, n-hexanol, n-heptanol, n-octanol and ethylene glycol Mixed, the ketone is acetone. 9 1339556 The liquid cooling heat dissipation system provided by the embodiment provides a nanometer particle and a protective agent dispersed in the working fluid 4, and the nanoparticle particle size is small, and the nanoparticle is prevented from coagulating in the presence of the protective agent. Therefore, the flow of the working fluid in the conduit in the liquid-cooled heat-dissipating system can be avoided, and the nano-particles have high thermal conductivity, which can reduce the cost of the cold-reading hot-line towel and the silk unit and the Wang Zuo fluid and the working fluid interior. The thermal resistance increases the heat dissipation efficiency of the liquid-cooled heat dissipation system. In summary, the present invention meets the requirements of the invention patent, and Newfa proposes a lion. However, the above is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Where
鲁贼、本毅藝之人士 ’在援依本紐_神所作之等效修飾或變化，皆應二 於以下之申請專利範圍内。 〜匕S 【圖式簡單說明】 第一圖係本技術方案之液冷式散熱系統示意.圖。 【主要元件符號說明】The equivalent modification or change made by the thief and the person of the yi yi yi in the aid of the yi _ _ God shall be within the scope of the following patent application. ~匕S [Simple description of the diagram] The first figure is a schematic diagram of the liquid-cooled heat dissipation system of the present technical solution. [Main component symbol description]
吸熱單元 連接導管 發熱元件 散熱單元 工作流體 液冷式散熱系統 4 10Heat absorbing unit Connecting conduit Heating element Heat sink unit Working fluid Liquid cooling system 4 10