1241881 九、發明說明： 【發明所屬之技術領域】 本發明是有關於-種熱管及熱沉之結合方法，特別是 指一種以鑄造技術將熱管及熱沉結合的方法。 【先前技術】 ㈣圖！ ’ -般電子設叙散熱措施大多是將―熱沉^ 與產生南溫之-電子元件13作緊密接觸，再將—孰管U 之-端與該熱U作表面之接觸，該熱管12是以銅管内容 裝水製成’該熱沉…及收熱量後經由該熱管12_端將 導至另-端，再以風U其他方式將熱散逸至大氣中。，、 θ圖2是現今業界常用之鼓人式熱沉組1()的剖視照片， 其是先將熱沉π鑽—孔洞14 ’該熱管12就塞裳於該孔洞 '中’而且該熱管12於製作時因以夾具封管過程而造成該 熱官12之端部形成—細長針狀之邊角尖部15，如僅將敎” 11鑽孔供熱管12插伸’必定會因該邊角尖部 ^ _ <、、豕 S文而 然法元王緊岔結合，增加-去夕姑雜办 S加一者之接觸熱阻，降低散熱效率 另外有些熱沉^ 1鱼敎瞢 & Η間疋以鉚接、銲接、表而扯 觸、嵌入等方式結合，但仍無法避免熱沉u與熱管 觸熱阻過大之現象，其熱傳效能亦無法完全發揮。 如以鑄造方式將熱沉與熱管結合則可使熱沉， 包覆於熱管12外周面，大幅降低二者間之接觸熱阻。L ’於鑄造之過程中不論是以半開放式砂模、溼砂模、：： 砂模底部設置以水冷卻之冷激底座，或者將該熱管U 2 1241881 一端以冷水冷卻方式鑄造製 屬液溫度過高，高n: '，都會因溶融之金 管12爆列二 無法即時散熱至外界，而造成熱 ^ 66〇r ^ "ISf Π，而銅-水製成之熱管可忍受之溫度僅戰，所以 ^ 10 ^ 风…& 12知壞，使熔融之金屬液 .....^ 。由圖3中可看出將鑄造成型後之埶管12 剝開時，可明顯看出管0 # Μ 扣Β内充滿鋁金屬16，也因此埶管12失 去散熱之功效 ”、、s U矢 【發明内容】 盘勒本卷月之目的即在提供-種以鑄造的技術使埶 沉與熱管結合的方法，可使埶、、〃 Κ便… 吏’、、、，儿緊松包覆熱管以降低二者 間之熱阻，提高散熱效率， 熱而損壞，提高生產良率 ^過"不會造成熱管過 * t是’本發明熱管與熱沉之結合方法，係運用-金屬 模具輕造-熱沉與—熱管結合’所述金屬模具具有一冷激 底座、-中空地形成於冷激底座内部之冷卻水道，及一由 該冷激底座頂面周緣向上 辟丘Pi p山， 之金屬圍壁’冷激底座及圍 壁共:界疋出-模穴’且該圍壁上形成一由外連通至模穴 内之牙孔’該熱管與熱沉之結合方法包含以下步驟： (A) 將冷卻料引人該冷卻水道中流動。 (B) 將該熱管之内端經由該穿孔由外穿伸入該模穴中 c)將該金屬模浸置於水中 I7、並保持模穴中乾燥。 〇)以液態氣體冷卻該熱管之外端。 1241881 (E )當熱管外端出現結霜現象時，將熔融之金屬液灌 注入模穴中，並持續以液態氣體冷卻熱管之外端，直到模 穴内之金屬液冷卻固化形成該熱沉。 (F )帶熱沉冷卻後，脫模以取出成品。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之一個較佳實施例的詳細說明中，將可 清楚的呈現。 參閱圖4與圖5，本發明之熱管31與熱沉32的結合方 法是運用一金屬模具4鑄造所述熱沉32於所述熱管31之 外周面’所述金屬模具4具有一冷激底座41、一中空盤誇 地形成於冷激底座41内部之冷卻水道42，及一由該冷激底 座41頂面向上延伸之金屬圍壁43。冷激底座41及金屬圍 壁43共同界定出一模穴44,且該金屬圍壁43上形成一由 外連通至模穴44内之穿孔45，該熱管31與熱沉32之結合 方法包含以下步驟： (A) 接管將冷卻水導引入該冷激底座41内部之冷卻 水道42中流動。 (B) 將該熱管31之内端311經由該圍壁上之穿孔 由外穿伸入該模穴44中。 (C) 將該金屬模具4浸置於水中。於本實施例中，水 位疋不超過圍壁上之穿孔45，以避免水流入模穴44内。作 如果熱管31穿伸入穿孔45後，穿孔45内以熱塑鋼土填滿 而可防水時，水位亦可達該金屬圍壁43頂緣之下方，以增 1241881 加政熱效果並保持模穴44内乾燥。因此實施上不以上述之 方式為限。 (D )以液態氣體持續冷卻該熱管3 1之外端3 12。本實 知例中該液態氣體是用液態氮作為冷卻熱管3丨之材料。 (E ) g熱管3 1外端3 12出現結霜現象時，將加熱至 66〇 C之熔融的鋁金屬液灌注入模穴44中，並持續以液態 氮Q部熱官3 1之外端3 12，直到模穴44内之鋁金屬液冷卻 至200 C並固化形成該熱沉32，再停止液態氮冷卻。 (F)待冷卻至室溫後，拆卸下該金屬模具4，脫模取 出熱/儿32與熱官3 1之結合成品。於本實施例中，該金屬 模/、4之金屬圍壁43是以四塊高熱傳導係數的金屬板43工 相互圍接並以熱塑鋼土固接而成，再將該金屬圍壁U固接 於該冷激底座41上，其中該穿孔45是形成於其中一金屬 板上。但實施上該金屬圍壁u之構造不以上述之方式 為限，，、要可與該冷激底座41共同圍界出模穴44空間， 又拆卸容易，方便脫模取出成品即可。 於上述之製作方法中，熔融之鋁金屬灌注入該模穴44 中時’，金屬之高溫熱量藉由冷激底丨41内流動之冷卻水 、該熱官31外端之液態氮，及金屬圍壁43外之水三種途 徑快速散熱至外界，不僅避免高溫造成熱管破裂，更可使 該熱管31及熱32沉緊密的結合，增加散熱效果。 以下續針對本發明結合之熱沉32與熱管31作功能及 結構上之檢測與說明。以下於測試過程中，本發明之結合 方法結合之熱沉32與熱管31為實驗組。另外取習知之嵌 1241881 式儿組為對照組以作為功能效果上之對照說明。 一、接觸熱阻之檢測與比較 蒼閱圖6，熱沉32與埶營3 1 Η夕拉雜也β 3g 31間之接觸熱阻的量測實驗 疋將…2壓抵於一可控制加熱功率的加熱片5上加数， :熱管Μ之外端312是以自'然熱對流方式來散熱，並於加 熱片5輸出不同功率下，量取熱沉32及熱管Μ外端312 之溫度變f。於測試實驗組與對照組時，於同-測試環境 下同日T里測一無熱官之熱沉的溫度變化作為比較。 另外，由於熱沉32㈣於加熱片5上之施力6大小合 ，響加熱片5與熱沉32間之熱阻大小，而—般實際運料 疋.扣具（圖未示）將該熱沉32扣緊固定於發熱之電子 凡件上，如電腦之CPU上之熱沉32就是以_扣制定於其 上所以於篁測熱沉32與熱管31間之熱阻前，須先確定 所需之屡抵之施力6。其測試方法如下：首先將熱沉32置 於加熱片5上方並用隔熱材料包覆，同時量測熱沉μ頂、 底面中〜點之溫度’隔熱材料上方給予適當之重量以麼抵 熱沉32緊抵該加熱片5。調整加熱片5輸出π之功率， 並逐步增加塵抵之重量’同時記錄數齡製成圖7,圖中橫 t為遂抵之施力6’縱軸為量測之溫度，由其中發現此溫度 隨施力6成正比，且去i旦说 田重里增加至1200公克之後，其熱沉 32溫度不會再隨重量增加而改變’故以下之測試均使用 1200公克之M抵施力6將熱沉32緊抵於該加敎片5上。 接著將實驗組織熱沉32組屡抵於加熱片5上，調整加 熱片5於一輸出功率，當熱沉32頂、底面中心點之溫度達 ^41881 —並維持二小時之 5之輪出功率。再一L 32底面溫度與加熱片 同之穩態溫度，重複上1:5之輸出功率’則可得另-不 到•為止。之後，;驟直到加^ 5之輸出功率達 無熱管之/之㈣方法重複測試對照組及 之關係曲線圖：:τ:^ 轴為熱沉32之溫声。甘 …加熱片5之輸出功率，縱 5產生之埶曰 & 中於貫驗組及對照組中，加埶片 座生之熱夏大部分經由埶 …、方 與加熱片5之四周散出，所 ’二部分是由熱沉32 熱量需於同一、、σ产 乂確估异熱官3 I傳出之 32鱼力… 將加熱片5產生之熱量減去由敛沉 32與加熱片5之四周散出之熱 由二 四周散出少勒旦…，儿乂興加熱片5之 。 之等於無熱管式熱沉逸散出之熱量功率 由圖8可讀出當熱沉32 出至實驗組熱沉32之功率是6 7C時，加熱片5輸 出至對照組之熱沉j7wr而相同溫度下加熱片5輸 2 7w , 輸出至無熱管式熱沉的功率是1241881 IX. Description of the invention: [Technical field to which the invention belongs] The present invention relates to a method for combining a heat pipe and a heat sink, in particular, a method for combining a heat pipe and a heat sink by a casting technique. [Prior art] ㈣ Figure! The heat dissipation measures of the general electronic design are mostly to closely contact the heat sink ^ with the electronic component 13 which generates the temperature of the South, and then contact the-end of the U tube with the surface of the heat U. The heat tube 12 is The copper tube is filled with water to make 'the heat sink ...' and the heat will be led to the other end via the 12_ end of the heat pipe, and then the heat will be dissipated to the atmosphere by wind U in other ways. , Θ Figure 2 is a cross-sectional photograph of a drum-type heat sink group 1 () commonly used in the industry today, which is to drill the heat sink π first-hole 14 'the heat pipe 12 is plugged in the hole' and ' When the heat pipe 12 is manufactured, the end of the heat officer 12 is formed due to the process of sealing the pipe with a clamp—the slender needle-shaped corner tip 15. If only the “敎” 11 drilled heating pipe 12 is inserted, it must be caused by the Corner tip ^ _ <, and 豕 S, but the law and the king are combined tightly to increase the contact thermal resistance of the-to Xigu miscellaneous office plus one to reduce the heat dissipation efficiency and some heat sink ^ 1 fish & Ηbetween 疋 is combined by riveting, welding, surface contact, embedding, etc., but the phenomenon of excessive heat resistance between the heat sink u and the heat pipe cannot be avoided, and its heat transfer efficiency cannot be fully exerted. The combination of heat sink and heat pipe can make the heat sink cover the outer surface of the heat pipe 12 and greatly reduce the contact thermal resistance between them. L 'In the casting process, whether it is a semi-open sand mold, wet sand mold, or: ： A water-cooled cold shock base is set at the bottom of the sand mold, or one end of the heat pipe U 2 1241881 is cast by cold water cooling The temperature of the control fluid is too high, high n: ', it will cause heat due to the molten gold tube 12 bursting the second row can not be immediately dissipated to the outside, resulting in heat ^ 66〇r ^ " ISf Π, and the copper-water heat pipe can endure The temperature is only at war, so ^ 10 ^ wind ... &12; bad, make molten metal liquid ..... ^. It can be seen from Figure 3 that when the cast iron tube 12 is peeled off, it is obvious It can be seen that the tube 0 # Μ buckle B is filled with aluminum metal 16, and therefore the tube 12 loses the heat dissipation effect. ", S U-ya [Summary of the Invention] The purpose of this scroll is to provide a kind of casting technology The method of combining sinking and heat pipe can make 埶 ,, 〃 便 will be tightly wrapped with heat pipe to reduce the thermal resistance between the two, improve heat dissipation efficiency, heat and damage, and improve production yield. ^ Over " will not cause overheating of the heat pipe * t is the method of combining the heat pipe and heat sink of the present invention, which uses-metal mold light manufacturing-heat sink and-heat pipe combination "said metal mold has a cold shock base, -medium An empty space is formed in the cooling water channel inside the cold shock base, and a mountain Pi p is raised upward from the periphery of the top surface of the cold shock base, The metal enclosure 'cold-shock base and enclosure are in common: boundary punch out-mold cavity', and a cavity formed from the outside to the cavity inside the cavity is formed. The method of combining the heat pipe and heat sink includes the following steps: (A ) Lead the coolant into the cooling water channel. (B) The inner end of the heat pipe is extended through the perforation into the cavity c) The metal mold is immersed in water I7 and kept in the cavity dry. O) Cool the outer end of the heat pipe with liquid gas. 1241881 (E) When frosting occurs on the outer end of the heat pipe, the molten metal is poured into the cavity, and the outer end of the heat pipe is continuously cooled with liquid gas until the metal liquid in the cavity cools and solidifies to form the heat sink. (F) After cooling with a heat sink, release the mold to take out the finished product. [Embodiment] The foregoing and other technical contents, features, and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings. Referring to FIGS. 4 and 5, a method for combining the heat pipe 31 and the heat sink 32 of the present invention is to use a metal mold 4 to cast the heat sink 32 on the outer peripheral surface of the heat pipe 31. The metal mold 4 has a cold shock base. 41. A hollow disk is a cooling water channel 42 exaggeratedly formed inside the cold shock base 41, and a metal surrounding wall 43 extending upward from the top surface of the cold shock base 41. The cold shock base 41 and the metal surrounding wall 43 jointly define a cavity 44, and a hole 45 is formed on the metal surrounding wall 43 and communicates with the inside of the cavity 44. The method of combining the heat pipe 31 and the heat sink 32 includes the following: Steps: (A) Take over and introduce cooling water into the cooling water channel 42 inside the cold shock base 41 to flow. (B) The inner end 311 of the heat pipe 31 is extended through the perforation on the surrounding wall into the cavity 44. (C) The metal mold 4 is immersed in water. In this embodiment, the water level 疋 does not exceed the perforation 45 on the surrounding wall to prevent water from flowing into the cavity 44. If the heat pipe 31 penetrates and extends into the perforation 45, the inside of the perforation 45 is filled with thermoplastic steel and waterproof, the water level can reach below the top edge of the metal wall 43 to increase the heat effect of the 1241881 and maintain the cavity 44 dry. Therefore, implementation is not limited to the above. (D) The outer end 3 12 of the heat pipe 31 is continuously cooled with a liquid gas. In this known example, the liquid gas uses liquid nitrogen as the material for the cooling heat pipe 3. (E) g When the frosting phenomenon occurs on the outer end 3 of the heat pipe 3 1, the molten aluminum metal liquid heated to 66 ° C. is poured into the cavity 44, and the outer end of the heat officer 3 1 is continuously heated with liquid nitrogen. 3 12 until the aluminum metal liquid in the cavity 44 is cooled to 200 C and solidified to form the heat sink 32, and then the liquid nitrogen cooling is stopped. (F) After cooling to room temperature, remove the metal mold 4 and release the mold to take out the combined product of the heat 32 and the heat official 31. In this embodiment, the metal enclosure wall 43 of the metal mold / 4 is formed by four metal plates 43 with high thermal conductivity, which are surrounded by each other and fixed with thermoplastic steel, and then the metal enclosure wall U is fixed. Connected to the cold shock base 41, wherein the through hole 45 is formed on one of the metal plates. However, in practice, the structure of the metal enclosure wall u is not limited to the above-mentioned method. It must be able to enclose the space of the mold cavity 44 with the cold shock base 41, and it must be easy to disassemble, and it can be easily removed from the mold to take out the finished product. In the above manufacturing method, when molten aluminum metal is poured into the cavity 44, the high-temperature heat of the metal is caused by the cooling water flowing in the cold shock bottom 41, the liquid nitrogen at the outer end of the heat official 31, and the metal The water outside the surrounding wall 43 can be quickly radiated to the outside world in three ways, which not only avoids the heat pipe rupture due to high temperature, but also enables the heat pipe 31 and heat 32 to be tightly combined to increase the heat dissipation effect. The following is a functional and structural inspection and description of the heat sink 32 and the heat pipe 31 combined in the present invention. In the following test, the heat sink 32 and the heat pipe 31 combined by the combination method of the present invention are the experimental group. In addition, the custom-embedded 1241881 group was used as a control group as a reference for functional effects. I. Detection and comparison of contact thermal resistance See Fig. 6. Measurement experiment of contact thermal resistance between heat sink 32 and Yingying 3 1 Η Xi Lazai β 3g 31 疋 Press 2 against a controllable heating power Add the following to the heating plate 5: The outer end 312 of the heat pipe M is used to dissipate heat by natural convection, and the temperature of the heat sink 32 and the outer end 312 of the heat pipe M is measured under different power output from the heating plate 5. f. When testing the experimental group and the control group, the temperature change of a heat sink without a heat official was measured at the same day T in the same-test environment for comparison. In addition, because the heat sink 32's force 6 on the heating plate 5 is the same, the heat resistance between the heating plate 5 and the heat sink 32 is large, and the actual material is generally transported. The fastener (not shown) will heat the heat. Shen 32 is fastened and fixed on the electronic components that are hot. For example, the heat sink 32 on the CPU of the computer is fixed on it with _ buckle. Therefore, before measuring the thermal resistance between the heat sink 32 and the heat pipe 31, you must determine the heat resistance. Need for repeated force 6. The test method is as follows: First, place the heat sink 32 on the heating plate 5 and cover it with a heat insulating material, and measure the temperature of the heat sink μ at the top and bottom of the bottom surface at the same time. Shen 32 abuts against the heating plate 5. Adjust the power of the heating plate 5 to output π, and gradually increase the weight of the dust. At the same time, record the number of years and make it into Figure 7. The horizontal t in the figure is the force applied 6 'and the vertical axis is the measured temperature. The temperature is proportional to the force of 6, and once Tian Tianli increases to 1200 grams, the temperature of the heat sink 32 will not change with the increase in weight. Therefore, the following tests use 1200 grams of M to resist the force of 6 The heat sink 32 abuts on the tab 5. Then 32 groups of experimental tissue heat sinks repeatedly reached the heating pad 5 and adjusted the output power of the heating pad 5 when the temperature of the top and bottom center points of the heat sink 32 reached ^ 41881—and maintained the output power of 5 for two hours. . Another L 32 bottom surface temperature is the same as the steady-state temperature of the heating plate, and repeating the output power of 1: 5, you can get another-not until •. After that, the test method is repeated until the output power of ^ 5 is reached without the heat pipe. The relationship between the control group and the graph is: τ: ^ The axis is the temperature sound of heat sink 32. Gan ... The output power of the heating plate 5 is generated by the & 5 in the test group and the control group. Most of the hot summer that is added to the heating plate is scattered through the heating plate 5 and the heating plate 5. Therefore, the second part is the heat sink 32. The heat needs to be the same. The σ production is estimated to be 32 fish power from the different heat officer 3. I subtract the heat generated by the heating plate 5 from the sinking 32 and the heating plate 5. The heat radiated from the surrounding area is from the two surrounding areas, Shao Ledan ..., the daughter-in-law Xing heating plate 5 of. It is equal to the heat power dissipated by the heat pipe-less heat sink. From Figure 8, it can be read that when the power from heat sink 32 to the heat sink 32 of the experimental group is 67C, the output of the heating plate 5 to the heat sink of the control group is the same. At the temperature of 5 to 27w, the power output to the heat pipe heat sink is
Dw，由上述之數據估算出， 力手疋 之四周A屮夕為旦 、7 C %熱沉32與加熱片5 埶量^3/1約為2'〜’而實驗組中由熱管31傳出之 果而對照组之熱管傳出之熱量為2W。由此結 以很/月楚地看出本發明製 沉組可傳送出更多之埶s “ 一儿32比坟入式熱 出功率日士 1 里就是當加熱片5於—定之輸 出功率日守，貫驗組之熱 沉溫度。例如於加熱片5是：:必：低於對照組之熱 底部溫度僅約_，而二Τ 驗組熱沉32之 、、且熱沉之底部溫度卻高於150 10 1241881 °c。此亦證明實驗組有較佳之散熱效果。 為 接著繼續進一步計算熱阻Rth，而熱阻定義Dw is estimated from the above data. The surrounding area of the hand is A, the temperature is 7 C%, the heat sink 32, and the heating plate 5. The amount ^ 3/1 is about 2 '~', and the heat transfer in the experimental group is 31. The heat output from the control group was 2W. Therefore, it can be seen very clearly that the sinking system of the present invention can transmit more 埶 s "One time 32 than the grave-in heat output power is 1 mile is when the heating plate 5 is at a fixed output power day The heat sink temperature of the test group. For example, in heating plate 5 :: must: the temperature of the heat bottom of the control group is only about _, but the temperature of the bottom of the heat sink 32 of the two T test group, and the temperature of the bottom of the heat sink is Above 150 10 1241881 ° c. This also proves that the experimental group has better heat dissipation effect. To continue to further calculate the thermal resistance Rth, and the thermal resistance is defined
D，一 TH - T CD, one TH-T C
WH 其中，^為加熱片5之輸出功率，Te為熱管31外端 31:溫度。〜為加熱片5與熱沉32之界面的中心點溫度， 也是上述之熱沉32底面中心點之溫度。根據上述測試: 中之量得數據，可絲計算出不同功率之下的η*溫度差 ’並緣製出圖9,圖中橫軸為加熱片5之輪出功率，縱轴為 溫度差，由圖中可明顯看出加熱片5之輸出功 ，奋 驗組熱沉32底部溫度與熱管31外端312之溫差最多不二 過5°C ’表示熱沉32吸收之熱量大都由熱管3ι傳送至執傳 外，而習知之對照組熱沉底部的溫差卻隨加熱片5之輸出 功率增加而逐漸加大，於7W時之溫差約高$听。此亦 證時實驗組之熱沉32與熱#31时較佳之傳熱效果。 圖10是熱阻Rth與加熱片5功率^之關係圖。於此圖 中’我們更可明顯看出本發明製作出之熱沉Μ與熱管η 間之熱阻，遠低於對照組之熱沉與熱管間的熱阻，此亦證 明以本發明之製作方法製作出之熱沉32與熱管Μ之結合 構造可大幅降低二者間之熱阻，提高散熱效率。 二、熱反應之比較 為進-步測試兩者之熱反應情形，我們利用電子調溫 ^將水溫固定約咖，同時將實驗組之熱沉32*對昭组之 熱沉放入電子調溫器之容器内的水中，且僅熱沉U部分置 1241881 入熱水中，而熱管3 1伸露於水面之上， 叫〜丄，然後$測埶管3 j 外端M2之溫度，此溫度隨時間之變化如圖u所示、。從圖 中可發現本發明製作結合之熱管31溫度上升速率較快\ 其溫度較接近水溫，由此可知本發明結合之熱管3ι與熱沉 3 2有較快之熱反應速率。 三、熱沉與熱管結合緊密性之檢測 於I測熱阻及反應時間後，便可將測試用之熱沉32做 破壞性檢驗，亦即將熱沉32做多次切割，以驗證熱沉κ於 鑄造時其内部是否有孔洞之產生。圖12為本發明之方法製φ 作出之熱沉32與熱管31成品的剖開照片，由照片中並看. 不到有任何孔洞，代表此鑄造技術的可行性。 接著檢視熱管31與熱沉32之結合緊密性。該熱管 於製作時於内端311上形成一細長針狀的邊角尖部％，由 於嵌入式之熱沉是將熱沉鑽孔後置入熱管，所以檢視邊角 尖部與熱沉結合時，可明顯發現圖2中習知之嵌入式熱沉 組的邊角尖部不易與熱沉完全接觸。而使用本發明之方法、 澆注鑄造出之熱沉32與熱管31結合成品其剖開之照片中_ 可發現熱官31與熱沉32是完全緊密結合的，此結構可大 幅降低熱沉32與熱管31間之熱阻。 為確定I呂質熱沉32中是否於鑄造時其内部包含有孔洞 ，所以進一步採用量測密度的方式來作檢測。首先將購置 錠切割成-個大小和逢注熱沉32相同尺寸之铭塊，再、 利用銑床加以研磨，量測出鋁錠之密度為2.68 g/cm3。 ， 第二步是量測堯注後之熱沉32之密度。先於澆注前利 12 1241881 用電子天平測量熱管31之重量丨lh44g’再用量筒來量盆 :積為6.5 cm:。於淹注之後，用電子天平量測熱沉32與熱 e 31之總重量為1〇5 95g，量測出之總體積為C咖3，將 熱管31之重量與體積扣除後，可得熱沉32重量 體積35.5 cm3’其密度為2.662 g/cm3。由上述兩個密度之 比較，可知此技術所製作之熱沉32,其孔隙之體積=有 0.67% ’所以其孔隙之比例並不高。 經過以上之量測實驗與破壞性檢視之後，可確定本發 明以鑄造方式結合出之熱沉32與熱管31，不僅其熱阻遠低 於對照組、傳熱與散熱效果快，且製作過程不會損壞熱， 且熱沉32内也不會有影響導熱效果的氣泡產生。 綜上所述，本發明熱沉32與熱管31之結合方法，以 澆注方式將熱沉32鑄造於該熱管31之外，而澆注之過程 以液態氮冷卻熱管31，並以冷卻水降低鋁質熱沉32熔融時 之高溫，使熱沉32與熱管31緊密結合，又不會造成熱管 31因高溫而破裂毀損，提高生產良率。而結合後之熱管3ι 與熱沉32間之熱阻低，導熱速度快，使熱沉32吸收之熱 量可經由熱管31快速傳送至外部散逸，故確實能達到本發 明之目的。 惟以上所述者，僅為本發明之較佳實施例而已，當不 能以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及說明書内容所作之簡單的等效變化與修飾，皆仍屬 本發明專利涵蓋之範圍内。 【圖式簡單說明】 13 1241881 圖1是習知之熱沉與熱管之立體分解圖，並說明該熱 沉與一發熱之電子元件接合之情形； 圖2是習知之一嵌入式熱沉組的剖視照片，以說明一 熱管内端上之邊角尖部與熱沉間之結合方式； 圖3是習知之嵌入式熱沉組的剖視照片，以說明該熱 管於洗注時破裂使熔融金屬液進入熱管内之情形； 圖4是本發明熱沉與熱管之結合方法的較佳實施例中 使用之一金屬模具的立體圖； 圖5是該較佳實施例中金屬模具之側面剖視圖； 圖6是以該較佳實施例之製作方法成型之一熱沉與一 熱管成品壓抵於一加熱片上加熱測試之側視圖； 圖7疋該熱 >儿壓抵於該加熱片上之施力大小與熱沉溫 度之關係曲線圖； 圖8是該加熱片之輸出功率與熱沉溫度之關係曲線圖 圖9是熱沉與熱管間之溫度差相對於該加熱片之❹ 功率的關係曲線圖； ^ 之輪出功 圖10是熱沉與熱管間之熱阻相對於該加熱片 率的關係曲線圖； 圖以熱沉之溫度變化隨時間之反應曲線圖；及 圖12是該較佳實施例製作出之熱沉與教管结人 的剖視照片’說明於鑄造過程中熱沉内不會產生氣、'包成 14 1241881 【主要元件符號說明】 31 熱管 42 冷卻水道 311 内端 43 圍壁 312 外端 431 金屬板 32 熱沉 44 模穴 33 邊角尖部 45 穿孔 4 金屬模具 5 加熱片 41 冷激底座 6 施力 15WH where ^ is the output power of the heating plate 5 and Te is the outer end 31 of the heat pipe 31: temperature. Is the temperature at the center point of the interface between the heating plate 5 and the heat sink 32, and is also the temperature at the center point of the bottom surface of the heat sink 32 described above. According to the data obtained in the above test: Kesi calculates the η * temperature difference 'under different powers and produces Figure 9. The horizontal axis in the figure is the output power of the heating plate 5 and the vertical axis is the temperature difference. It can be clearly seen from the figure that the output work of the heating plate 5 is that the temperature difference between the bottom temperature of the heat sink 32 and the outer end 312 of the heat pipe 31 is not more than 5 ° C. Outside the book, the temperature difference at the bottom of the heat sink of the conventional control group gradually increased with the increase of the output power of the heating plate 5. At 7W, the temperature difference was about $ high. This also proves that the heat transfer effect of the heat sink 32 and heat # 31 of the experimental group is better. FIG. 10 is a relationship diagram between the thermal resistance Rth and the power 5 of the heating chip. In this figure, 'we can clearly see that the thermal resistance between the heat sink M and the heat pipe η produced by the present invention is much lower than the heat resistance between the heat sink and the heat pipe of the control group, which also proves that the production by the present invention The combined structure of the heat sink 32 and the heat pipe M produced by the method can greatly reduce the thermal resistance between the two and improve the heat dissipation efficiency. Second, the comparison of the thermal response is to further test the thermal response of the two. We use electronic temperature adjustment ^ to fix the temperature of the coffee, at the same time, the heat sink of the experimental group 32 * to the heat sink of the Zhao group is placed in the electronic In the water in the container of the thermostat, only the heat sink U part is placed into the hot water, and the heat pipe 31 is exposed above the water surface, called ~ 丄, and then the temperature of the outer end M2 of the pipe 3 j is measured. The change of temperature with time is shown in Figure u. It can be seen from the figure that the combined heat pipe 31 produced by the present invention has a faster temperature rise rate and its temperature is closer to the water temperature. It can be seen that the combined heat pipe 3m and heat sink 32 have a faster thermal reaction rate. 3. Detection of the tightness of the combination of heat sink and heat pipe After measuring the thermal resistance and reaction time, the heat sink 32 used for the test can be used for destructive inspection, and the heat sink 32 will be cut multiple times to verify the heat sink κ Whether there are holes in the interior during casting. FIG. 12 is a cut-away photograph of the finished product of the heat sink 32 and the heat pipe 31 made by the method φ of the present invention. From the photograph and seen, there are no holes, which represents the feasibility of this casting technology. Next, check the tightness of the combination of the heat pipe 31 and the heat sink 32. When the heat pipe is manufactured, an elongated needle-shaped corner tip% is formed on the inner end 311. Since the embedded heat sink is drilled into the heat pipe and placed in the heat pipe, when the corner tip is combined with the heat sink, It can be clearly found that the corner tips of the conventional embedded heat sink group shown in FIG. 2 are not easy to completely contact the heat sink. And using the method of the present invention, the heat sink 32 and the heat pipe 31 combined with the casted product are cut out in the photo_ It can be found that the heat official 31 and the heat sink 32 are completely tightly combined, and this structure can greatly reduce the heat sink 32 and Thermal resistance between heat pipes 31. In order to determine whether there are holes in I Lu Zhi heat sink 32 during casting, the density is further measured for testing. First, the purchased ingot was cut into a block of the same size as the heat sink 32, and then milled with a milling machine. The density of the aluminum ingot was measured to be 2.68 g / cm3. The second step is to measure the density of heat sink 32 after the injection. Before pouring 12 1241881, measure the weight of heat pipe 31 with an electronic balance, lh44g ’, and then use a measuring cylinder to measure the basin: the product is 6.5 cm :. After the flooding, the total weight of the heat sink 32 and the heat e 31 was measured by an electronic balance to be 105 95 g, and the measured total volume was C 3. After deducting the weight and volume of the heat pipe 31, heat was obtained. Shen 32 has a weight of 35.5 cm3 'and a density of 2.662 g / cm3. From the comparison of the above two densities, it can be seen that the heat sink 32 made by this technology has a pore volume = 0.67% ′ so the proportion of pores is not high. After the above measurement experiments and destructive inspection, it can be determined that the heat sink 32 and the heat pipe 31 combined by the casting method of the present invention not only have a thermal resistance much lower than that of the control group, but also have fast heat transfer and heat dissipation effects, and the manufacturing process is not The heat will be damaged, and there will be no air bubbles in the heat sink 32 that affect the thermal conductivity. In summary, in the method of combining heat sink 32 and heat pipe 31 of the present invention, heat sink 32 is cast outside the heat pipe 31 by pouring, and the heat pipe 31 is cooled with liquid nitrogen during the pouring process, and the aluminum is reduced with cooling water. The high temperature when the heat sink 32 is melted makes the heat sink 32 and the heat pipe 31 tightly combined without causing the heat pipe 31 to be broken and damaged due to the high temperature, which improves the production yield. The combined heat pipe 3m and the heat sink 32 have low thermal resistance and fast heat conduction speed, so that the heat absorbed by the heat sink 32 can be quickly transmitted to the outside through the heat pipe 31, so that the purpose of the present invention can be achieved. However, the above are only the preferred embodiments of the present invention. When the scope of implementation of the present invention cannot be limited in this way, that is, any simple equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the description of the present invention are all Still within the scope of the invention patent. [Schematic description] 13 1241881 Figure 1 is a conventional exploded perspective view of a heat sink and a heat pipe, and illustrates the joint between the heat sink and a heating electronic component; Figure 2 is a cross-section of one of the conventional embedded heat sink groups View the photo to illustrate the combination of the corner tip and the heat sink on the inner end of a heat pipe; Figure 3 is a cross-sectional photo of a conventional embedded heat sink group to illustrate that the heat pipe ruptures during melting and melts the molten metal The liquid enters the heat pipe; Figure 4 is a perspective view of a metal mold used in a preferred embodiment of the method of combining a heat sink and a heat pipe of the present invention; Figure 5 is a side sectional view of the metal mold in the preferred embodiment; It is a side view of a heat sink and a finished product of a heat pipe pressed against a heating plate formed by the manufacturing method of the preferred embodiment. Fig. 7 疋 The heat > Figure 8 shows the relationship between the output of the heating plate and the temperature of the heat sink. Figure 9 shows the relationship between the temperature difference between the heat sink and the heat pipe and the power of the heating plate. ^ Wheel work figure 10 The relationship between the heat resistance of the heat sink and the heat pipe with respect to the heating sheet rate; the reaction curve of the temperature change of the heat sink with time; and FIG. 12 is the heat sink and the teaching tube produced by the preferred embodiment The cross-section photograph of the person 'shows that no gas is generated in the heat sink during the casting process, and' encapsulation is 14 1241881 [Description of the main component symbols] 31 Heat pipe 42 Cooling channel 311 Inner end 43 Surrounding wall 312 Outer end 431 Metal plate 32 Heat Shen 44 Mold cavity 33 Corner tip 45 Perforation 4 Metal mold 5 Heating plate 41 Cold shock base 6 Force 15