1308941 九、發明說明： 【發明所屬之技術領域】 本發明涉及一種幫浦，特別係—種用於液冷 統的幫浦。 …、糸 【先前技術】 一般帶有熱源的電子産品，均需要有散熱的系统， 電腦内部設有中央處理器（CPU)，由於中央處理器卫作時备 發熱，故必須於中央處理器上設置散熱裝置，以防二 處理器發生過熱問題。 中央 ^知之電腦CPU散熱裝置中，液冷式散熱系統有逐 漸被廣泛制的趨勢，為了可使冷卻液於液 内部産生循環，一船合讯要対、主 、驭‘、、、系統 生推六：二、幫浦，以該幫浦對冷卻液産 θ…生循環，從而讓冷卻液帶走CPU的熱 置°通常該幫浦包括-葉輪及驅動該葉輪旋轉之馬達，气 馬達具有—㈣馬料狀電路板，電路板上設 = 發熱電子元件，為防止馬達 置於-密閉之腔室中广主’通常將該馬達 旦私炊」 幫浦工作時電路板産生之熱 路/、=室中，從而導致密閉腔室之溫度升高，這 有極大的影響’從而影響整個散熱系統之 效此。因此’如何將密閉 之溫度是一個急需解決之心之熱A出’降低電路板 【發明内容】 有鐾於此，有必^ .., 要棱供一種幫浦，可有效避免幫浦内 6 1308941 電路板過熱的現象。 種幫浦’應用於液冷散熱系統，其包括一殼體，該 殼體包括一具有進水口及出水口之本體、一安裝於本體頂 端之頂蓋及一安裝於本體底端之底座，該殼體具有一收容 空間及與該收容空間相隔離之密閉腔室；一葉輪組收容於 该殼體之收容空間内；一驅動該葉輪組之驅動單元收容於 該殼體之密閉腔室内，該驅動單元包括一馬達及一與馬達 電性連接的電路板，複數發熱電子元件置於該電路板上； 該頂蓋罩設於驅動單元頂部且與驅動單元的電路板的電子 元件接觸以散發電子元件產生的熱量，該收容空間包括一 收容葉輪組的第一腔室，該密閉容腔圍繞該第一腔室，一 吸熱體收容於該收容空間内且置於該殼體的底座上，該吸 熱體設有複數與第一腔室連通的通道。 相較於習知技術，本發明中幫浦之頂蓋與置於密閉腔 室中驅動單it的電路板上的電子元件接觸，可將電子元件 産生的熱量快速散發，從而有效控制密閉腔室中的溫度， 防止電路板過熱，從而提高幫浦的效率，同時，吸Μ吸 收底座之熱量’從而使與底座接觸的電子元件的熱量快速 散發。 【實施方式】 請參照圖1至圖3所示，士旅η0、产人 ,.I±_ 本毛明液冷式散熱系統幫浦 包括一方形设體10、一組梦於私辦 〇 忒於忒體10内之葉輪組20、一 驅動单兀30、一過濾器η or. , _ s 及'，、、體40 ’其中該葉輪組 20由该驅動早元30驅動而旋轉。 7 1308941 殼體10呈立方體狀其包括具内部空間之本體12、安裝 於本體12頂端之頂蓋15及安裝於本體12底端之底座16。 該本體12内部空間容置一分隔體14，該分隔體14用於隔 開殼體10内之液體與驅動單元30，防止液體進入該驅動單 元30中造成線路的短路。一中空圓柱體11置於本體12内 壁與分隔體14之間且該枉體11分別與本體12之内壁及分 隔體14外壁相連。一密封圈121卡置於本體12底端與底 座16之間，從而防止底座16與本體12卡合後液體外泄。 本體12之一側壁上形成有一供液體流進本體12内之進水 口 122及一供液體流出本體14出水口 124,其中出水口 124 所在位置高於進水口 122所在位置。本體12内之四角落處 形成有帶孔之凸柱120。 該分隔體14用以將驅動單元30與液體隔離開來，其 包括一第一收容部140及一與第一收容部140連通之第二 收容部142，該第一及第二收容部140、142均呈中空圓柱 狀，其中該第一收容部140具有一頂壁143，該頂壁143 向下延伸設置一軸座1430，複數軸向延伸之突肋144形成 於第一收容部140之外壁，以與驅動單元30配合；該第二 收容部142具有一向下開口，其直徑較第一收容部140之 直徑大且與圓柱體11連接。 該底座16大致呈方形設置，四螺絲162穿過該底座16 之四角落進而與本體12内之凸柱120螺合從而將該底座16 鎖固於本體12底部。該底座16與置於一電路板（圖未示） 上之一發熱電子元件（圖未示）貼合，以吸收該電子元件産生 1308941 的熱量。 广ι/Γ 了'閱圖4，吸熱體40收容於殼體10中且置;^底 座Μ上，用以鱼叨你矻广^ 又菔川τ且置於底 形二c中每：體4〇由複數平行排列的銅‘ 間隔設置之凹口：2 :2外端緣周向設有複數等距且 向延伸m 片體42自令央位置處向其外徑 1孔Γ2〇之p 的縱長槽孔侧，每一片體42相鄰 :槽孔420之間形成一換熱部421，該換熱部421上設有一 的凹槽424,該凹槽424之二延伸臂沿徑向方 向延伸’該凹槽424的二對稱延伸臂之間形成一隔片423, 该隔=423的長度小於槽孔42㈣長度。組裝這些片體42 時每>{體42之隔片423對準且置於相鄰片體42之槽 孔420 ’如此适些片體42之間形成複數液體通道44，以供 液體流入該吸熱體4〇中充分與每一片體42進行熱交換。 一安裝板41置於吸熱體40頂部，該安裝板41設有一 中心孔（圖未標），該中心孔與吸熱體4〇上槽孔42〇處於中 央位置的部分對應，從而使該中心孔與吸熱體4〇之液體通 道44連通。 一罩體13收容於本體12之内部空間且夾置於分隔體 14之第二收容部142之底端與安裝板41之間，該罩體13 包括一圓形頂壁130及自該頂壁130邊緣向下延伸設置之 圓柱形側壁132 ’ 一環形臺階1302形成於頂壁13〇之邊緣 位置處，且較該頂壁130的位置低，該臺階1302用以與第 9 1308941 二收容部142之底端緊密配合。一圓弧形卡緣1324自側壁 132底端周向延伸，以卡置於本體12内圓柱體11的相應位 置處；一大致呈倒U形卡緣1326連接於卡緣1324的二自 由端，該倒U形卡緣1326圍成一與進水口 122相對的入口 區13 7 ’該入口區13 7中央位置處設有一與進水口 12 2相對 且連通的開口 1320，以使液體從該開口 1320流入罩體13 中，該倒U形卡緣1326與圓柱體11相應的内壁抵靠以使 該入口區137與圓柱體11内壁之間形成一空間，液體可以 從罩體13中流經該空間進而向下流入置於罩體13下方的 吸熱體40中。複數通孔1322周向設置於罩體13側壁132 上且位於開口 1320的上方位置；罩體13的頂壁130中央 位置處向下凹陷形成一凹陷部134，該凹陷部134周圍形成 有複數弧形通孔135,該等通孔135呈圓周圍繞凹陷部 134 ;罩體13的頂壁130對應於通孔135向下延伸形成有 一中空的支撐柱136，該支撐柱136抵靠於安裝板41頂部 且圍繞該安裝板41的中心孔，該支撐柱136的内壁圍繞形 成一容腔1360，該容腔1360與通孔135相連通及吸熱體 40的液體通道44連通以使液體能夠從吸熱體40的通道44 經由支撐柱136内的容腔1360從通孔135流入分隔體14 中。請同時參閱圖5，一具有一定高度的環形臺階1364形 成於支撐柱136的外壁，且該臺階1364的外壁的二相對側 分別形成一擋板1362，該擋板1362的底部與臺階1364底 部齊平。 該過濾器17收容於罩體13中且套置於罩體13的支撐 10 1308941 柱136外壁上，該過濾器17包括一頂壁170及自該頂壁170 末端向下延伸設置的側壁172。一中心孔1702設於頂壁170 中央位置處，該中心孔1702的直徑與罩體13的支撐柱136 直徑相當以供該支撐柱136穿過。複數小孔1704設置於該 過濾器17的頂壁170及侧壁172，以供液體中混入的氣體 逃出。逃出該等小孔1704的氣體存儲於罩體13中且彙聚 成大的氣泡不能再從該等小孔1704中返回過濾器17中。 該頂壁170抵頂於罩體13的臺階1364及擋板1362上，使 過濾器17的頂壁170與罩體13的頂壁130隔開，從而利 於氣體從過濾器17的頂壁170逃出。二门形框174對稱形 成於過濾器17的侧壁172上，其中一门形框174與罩體13 上的開口 1320相對應且該框174的邊緣抵頂於罩體13的 入口區137，而另一相對的门形框174則抵頂於罩體13相 應侧壁132上，如此從進水口 122進入的液體直接從開口 1320進入該過濾器17中。 該葉輪組20收容於分隔體14中，其包括一具有中心 孔212的葉輪21、一安裝於分隔體14頂壁143軸座1430 中的轉軸23、一套置於轉軸23上的軸承25。其中該轉軸 23及軸承25收容於該葉輪21的中心孔212中。該葉輪21 包括一圓柱形輪轂210及複數自輪轂210末端向外發散彎 曲延伸設置的葉片211，該輪轂210内嵌置一永久磁鐵22。 該永久磁鐵22呈中空圓柱狀，設有複數交錯排列的N極與 S極。該葉輪組20使用兩對環形扁平狀磁環26-29控制葉 輪21的軸向定位。其中磁環26、27套置於轉軸23上並位 11 1308941 於軸承25上方互相隔開且相對設置，磁環28、29置於軸 承25下方互相隔開且相對設置；磁環27、29卡置於葉輪 21中心孔212的上下兩端且隨葉輪21 —起轉動，磁環26 卡置於軸座1430末端，磁環29則卡置於罩體13的頂壁130 的凹陷部134中。該兩對磁環26-29相互之間形成的磁力以 平衡葉輪21在軸向方向上受到的液體的作用力及葉輪21 本身的重力，使葉輪21工作時處於平衡懸浮狀態。 本發明中，分隔體14、罩體13及安裝板41共同將殼 體10分成四個腔室，即第一腔室102、第二腔室104、第 三腔室106和第四腔室108。其中第一腔室102由分隔體 14的内壁及罩體13的頂壁130圍成，用以收容葉輪組20 ; 該第二腔室104圍繞罩體13的支撐柱136且夾置於罩體13 的頂壁130及安裝板41之間的空間，但不包括由罩體13 支撐柱136所圍成的容腔1360，另外，該第二腔室104還 包括一儲氣室18，該儲氣室18由過濾器17的外壁及罩體 13的内壁所圍成，用以儲存從過濾器17的小孔1704逃出 的氣體；該第三腔室106用以收容吸熱體40,其由容腔1360 及位於該容腔1360下方且夾置於安裝板41及底座16之間 的空間45構成，該第三腔室106通過容腔1360上方的通 孔135與第一腔室102連通，由此該二相互連通的第一及 第三腔室102、106共同構成了液體的工作通道。進水口 122 位於第二腔室104相應位置處，液體自該進水口 122進入 該第二腔室104中；出水口 124位於第一腔室102相應位置處，收 容於第一腔室102中的葉輪21以驅動流入第一腔室102中的 12 1308941 液體自該出水口 124流出；第四腔室108位於分隔體14的 第二收容部142上方且圍繞第一收容部140，該第四腔室 108為一密閉腔室其圍繞該第一腔室102，且分別與第一、 第二及第三腔室102、104、106隔離且液體無法流入該密 閉腔室，該第四腔室108用以收容驅動單元30。 收容於第四腔室108中的驅動單元30包括一帶有定子 32的馬達及置於該定子32頂部且與該定子32電性連接的 電路板33。該定子32環繞套置於分隔體14的第一收容部 140的外壁上且與外壁的突肋144配合，其在軸向上由分隔 體14的第二收容部142頂壁支撐，在徑向上由本體12内 的柱體11抵頂，該定子32具有複數纏繞於定子32上線圈 320。電路板33則置於分隔體14頂壁143的上，用以給定 子32的線圈320提供持續的電流從而産生磁場推動葉輪21 轉動。 置於密閉腔室頂部的頂蓋15大致呈方形設置，該頂蓋 15的四角落處向下延伸設置有插銷152用以與本體12的凸 柱120配合，從而使頂蓋15安裝於本體12的頂端。一向 上的凸出部150自頂蓋中部向上突起，用以容置且接觸驅 動單元30電路板33上的電子元件330，該頂蓋15由導熱 性良好的材料製成，可以是金屬或非金屬材料，在本實施 例中頂蓋15的材料為鋁，用以為電路板33上的電子元件 330産生的熱量進行散熱。為確保頂蓋15的凸出部150與 發熱電子元件330的緊密接觸，具有一定厚度的可壓縮導 熱膠片151貼置於凸出部150與電子元件330所接觸的底 13 1308941 面，用以提高頂蓋15與電子元件330之間的熱傳輸，當電 —子元件330工作時其産生的熱量使導熱膠片151變形從而 填滿與電子元件330之間的空隙，使頂蓋15與電子元件330 充分接觸，利用頂蓋15大的散熱面積達到散熱的目的。 本發明在使用時，液體被葉輪21驅動從進水口 124流入置於第二 腔室104的過濾器17中，經過過濾器17時混入液體中的氣 體從過濾器17的小孔1704中逃出，儲存於該儲氣室18中； 在過濾器17中流動一圈的液體經罩體13上的開口 1320流 出，由於液體的重力原因，其自罩體13的入口區137向下 沿著吸熱體40的末端緣流入第三腔室106中，由於底座16 與電路板上的發熱電子元件緊密接觸，從而吸收電子元件 産生的熱量，底座16吸收熱量後傳遞置流入該第三腔室 106的液體，液體流經吸熱體40的通道44中與吸熱體40 的每一片體42進行大面積熱交換；然後液體從罩體13的 通孔135流入第一腔室102中最後通過葉輪21的離心力將 其從出水口 124甩出；同時葉輪21的轉動由位於第四密閉 腔室108的驅動單元30驅動，驅動單元30工作時，其的 電路板33上的電子元件330産生大量的熱，由於頂蓋15 的設置，使電子元件330産生的熱量可迅速傳遞至頂蓋15 上，進而將電路板33上的熱量通過頂蓋15快速散發至周 圍的環境中，從而使第四密閉腔室108的溫度保持在正常 的範圍内，而不會使驅動單元30的電路板33溫度過高。 如是，本發明可有效避免因驅動單元30的電路板33處 於密閉腔室中而導致其溫度過高進而降低電路板33使用壽 14 1308941 命的現象。 綜上所述，本發明符合發明專利要件，羑依法提出哀 利申請。惟，以上該者僅為本發明之較出專 悉本案技藝之人士，在爰 、'+凡熟 ^ 牡支依本發明精神所作之等效傪德·+、 變化’皆應涵蓋S以下之申請專利範圍内。 【圖式簡單說明】 圖1係本發明幫浦之立體分解圖。 圖2係本發明幫浦之立體組合圖。 圖3係沿圖2中線ιπ-πι之剖示圖。 圖4係圖1中吸熱體之立體分解圖。 圖5係圖χ中罩體之立體圖。 圖6係圖1中頂蓋之立體圖。 【主要元件符號說明】 殼體 第二腔室 第四腔室 本體 密封圈 出水口 頂壁 側壁 通孔 凹陷部 10 104 108 12 121 124 130、143、 132 、 172 1322 134 第一腔室 第三腔室 圓柱體 凸柱 進水口 罩體 臺階 開口 卡緣 通孔 102 106 11 120 122 13 1302 、 1364 1320 1324 、 1326 15 135 1308941 支撐柱 136 容腔 1360 擂板 1362 入口區 137 空間 138 、 45 分隔體 14 第一收容部 140 第二收容部142 軸座 1430 突肋 144 頂蓋 15 凸出部 150 導熱膠片 151 插銷 152 底座 16 螺絲 162 過濾器 17 中心孔 1702 小孔 1704 门形框 174 、 175 儲氣室 18 葉輪組 20 葉輪 21 輪毅 210 葉片 211 中心孔 212 永久磁鐵 22 轉轴 23 軸承 25 磁環 26、27、28、29 驅動單元 30 定子 32 線圈 320 電路板 33 電子元件 330 吸熱體 40 安裝板 41 片體 42 槽孔 420 換熱部 421 凹口 422 隔片 423 凹槽 424 通道 44 161308941 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD The present invention relates to a pump, and more particularly to a pump for liquid cooling. ..., 糸 [Prior Art] Generally, electronic products with heat sources require a system with heat dissipation. The central processing unit (CPU) is installed inside the computer. Because the central processing unit is hot, it must be on the central processing unit. Set the heat sink to prevent overheating of the second processor. In the CPU cooling device of the central computer, the liquid-cooled heat dissipation system has been gradually widely used. In order to make the coolant flow in the liquid, a ship's communication is required to be smashed, master, 驭',, and system. Sixth: Second, the pump, with the pump on the coolant production θ ... cycle, so that the coolant takes away the CPU's heat. Usually the pump includes - the impeller and the motor that drives the impeller, the gas motor has - (4) Horse-like circuit board, the circuit board is equipped with = heating electronic components, in order to prevent the motor from being placed in the -closed chamber, the main character 'usually the motor is privately smashed'. The heat circuit generated by the circuit board during the working of the pump / = in the chamber, which causes the temperature of the closed chamber to rise, which has a great influence 'and thus affects the entire heat dissipation system. Therefore, 'how to seal the temperature is an urgent need to solve the heat of the heart A' lowering the circuit board [invention content] In this case, there must be ^.., to provide a kind of pump, can effectively avoid the pump inside 6 1308941 The board is overheated. The utility model relates to a liquid cooling system, which comprises a casing, the casing comprises a body having a water inlet and a water outlet, a top cover mounted on the top end of the body and a base mounted on the bottom end of the body, The housing has a receiving space and a sealed chamber separated from the receiving space; an impeller group is received in the receiving space of the housing; and a driving unit driving the impeller group is received in the sealed chamber of the housing, The driving unit includes a motor and a circuit board electrically connected to the motor, and the plurality of heat-generating electronic components are disposed on the circuit board; the top cover is disposed on the top of the driving unit and is in contact with the electronic components of the circuit board of the driving unit to emit electrons The heat generated by the component, the accommodating space includes a first chamber for accommodating the impeller group, the sealed cavity surrounds the first chamber, and a heat absorbing body is received in the accommodating space and placed on the base of the housing. The heat absorbing body is provided with a plurality of passages communicating with the first chamber. Compared with the prior art, the top cover of the pump in the present invention is in contact with the electronic components on the circuit board for driving the single unit in the closed chamber, and the heat generated by the electronic components can be quickly dissipated, thereby effectively controlling the closed chamber. The temperature in the circuit prevents the board from overheating, thereby increasing the efficiency of the pump, and at the same time, absorbing the heat of the absorbing base', so that the heat of the electronic components in contact with the pedestal is quickly dissipated. [Embodiment] Please refer to Figure 1 to Figure 3. The taxi η0, the producer, the .I±_ The Maoming liquid cooling system has a square body 10 and a group of dreams. The impeller group 20 in the body 10, a driving unit 30, a filter η or., _ s and ', , the body 40 ' wherein the impeller group 20 is driven to rotate by the driving element 30. 7 1308941 The housing 10 is in the form of a cube comprising a body 12 having an internal space, a top cover 15 mounted to the top end of the body 12, and a base 16 mounted to the bottom end of the body 12. The inner space of the body 12 houses a partition 14 for separating the liquid and the driving unit 30 in the casing 10 to prevent liquid from entering the driving unit 30 to cause short circuit of the line. A hollow cylinder 11 is placed between the inner wall of the body 12 and the partition 14 and the body 11 is connected to the inner wall of the body 12 and the outer wall of the partition 14, respectively. A sealing ring 121 is interposed between the bottom end of the body 12 and the bottom seat 16, thereby preventing the liquid from leaking out after the base 16 is engaged with the body 12. One side wall of the body 12 is formed with a water inlet 122 for liquid to flow into the body 12 and a liquid outlet 124 for liquid to flow out of the body 14. The water outlet 124 is located higher than the water inlet 122. A stud 120 having a hole is formed at four corners of the body 12. The partitioning body 14 is configured to isolate the driving unit 30 from the liquid, and includes a first receiving portion 140 and a second receiving portion 142 communicating with the first receiving portion 140. The first and second receiving portions 140, The 142 is a hollow cylindrical shape, wherein the first receiving portion 140 has a top wall 143. The top wall 143 defines a shaft seat 1430 extending downwardly. The plurality of axially extending protruding ribs 144 are formed on the outer wall of the first receiving portion 140. The second receiving portion 142 has a downward opening, and has a diameter larger than the diameter of the first receiving portion 140 and is connected to the cylinder 11 . The base 16 is substantially square. The four screws 162 pass through the four corners of the base 16 to be screwed with the protrusions 120 in the body 12 to lock the base 16 to the bottom of the body 12. The base 16 is attached to a heat-generating electronic component (not shown) disposed on a circuit board (not shown) to absorb the heat generated by the electronic component 1308941.广 Γ / Γ ' 'reading Figure 4, the heat absorbing body 40 is housed in the housing 10 and placed; ^ base Μ, for the fish 叨 矻 ^ 菔 菔 菔 菔 且 且 且 且 且 且 且 且 且 且 且 且 且4 凹 〇 〇 〇 〇 〇 ' ' ' ' ' ' ' ' ' 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 On the side of the long slot, each of the strips 42 is adjacent to each other: a heat exchange portion 421 is formed between the slots 420, and the heat exchange portion 421 is provided with a recess 424, and the extension arms of the recess 424 extend in the radial direction. A spacer 423 is formed between the two symmetric extension arms of the recess 424. The length of the spacer 423 is smaller than the length of the slot 42 (four). When the sheets 42 are assembled, each of the spacers 423 of the body 42 is aligned and placed in the slots 420' of the adjacent sheets 42 such that a plurality of liquid passages 44 are formed between the sheets 42 for liquid to flow into the sheet 42 The heat absorbing body 4 is sufficiently heat exchanged with each of the sheets 42. A mounting plate 41 is disposed on the top of the heat absorbing body 40. The mounting plate 41 is provided with a center hole (not shown) corresponding to a portion of the heat absorbing body 4 at the center of the slot 42 ,, so that the center hole It is in communication with the liquid passage 44 of the heat absorbing body. A cover 13 is received in the inner space of the body 12 and sandwiched between the bottom end of the second receiving portion 142 of the partition 14 and the mounting plate 41. The cover 13 includes a circular top wall 130 and the top wall. A cylindrical side wall 132 ′ extending downwardly from the edge 130 is formed at an edge of the top wall 13 , and is lower than the position of the top wall 130 . The step 1302 is used for the second receiving portion 142 of the ninth The bottom end is tightly fitted. A circular arc-shaped card edge 1324 extends circumferentially from the bottom end of the side wall 132 to be positioned at a corresponding position of the cylinder 11 in the body 12; a substantially inverted U-shaped card edge 1326 is coupled to the two free ends of the card edge 1324. The inverted U-shaped card edge 1326 encloses an inlet region 13 7 ′ opposite the water inlet 122. The central portion of the inlet region 13 7 is provided with an opening 1320 opposite to and communicating with the water inlet 12 2 to allow liquid to pass from the opening 1320. Flowing into the cover 13, the inverted U-shaped card edge 1326 abuts against the corresponding inner wall of the cylinder 11 to form a space between the inlet region 137 and the inner wall of the cylinder 11, through which the liquid can flow from the cover 13 It flows downward into the heat absorbing body 40 placed under the cover 13. The plurality of through holes 1322 are circumferentially disposed on the side wall 132 of the cover 13 and located above the opening 1320. The central portion of the top wall 130 of the cover 13 is recessed downward to form a recess 134, and a plurality of arcs are formed around the recess 134. The through holes 135 are circumferentially surrounding the recesses 134. The top wall 130 of the cover 13 extends downwardly corresponding to the through holes 135 to form a hollow support post 136. The support post 136 abuts against the mounting plate 41. At the top and surrounding the central hole of the mounting plate 41, the inner wall of the supporting column 136 surrounds a cavity 1360, and the cavity 1360 communicates with the through hole 135 and the liquid passage 44 of the heat absorbing body 40 communicates to enable liquid to be absorbed from the heat absorbing body. The passage 44 of 40 flows into the separator 14 from the through hole 135 via the cavity 1360 in the support column 136. Referring to FIG. 5, an annular step 1364 having a certain height is formed on the outer wall of the support column 136, and two opposite sides of the outer wall of the step 1364 respectively form a baffle 1362. The bottom of the baffle 1362 is flush with the bottom of the step 1364. level. The filter 17 is received in the cover 13 and sleeved on the outer wall of the support 101308941 column 136 of the cover 13. The filter 17 includes a top wall 170 and side walls 172 extending downward from the end of the top wall 170. A central aperture 1702 is provided at a central location of the top wall 170. The diameter of the central aperture 1702 is comparable to the diameter of the support post 136 of the housing 13 for the support post 136 to pass through. A plurality of small holes 1704 are provided in the top wall 170 and the side wall 172 of the filter 17 for the gas mixed in the liquid to escape. The gas that escapes the apertures 1704 is stored in the housing 13 and condenses into large bubbles that can no longer be returned from the apertures 1704 to the filter 17. The top wall 170 abuts against the step 1364 of the cover 13 and the baffle 1362 to separate the top wall 170 of the filter 17 from the top wall 130 of the cover 13 to facilitate gas escape from the top wall 170 of the filter 17. Out. The two-shaped frame 174 is symmetrically formed on the side wall 172 of the filter 17, wherein a sash 174 corresponds to the opening 1320 on the cover 13 and the edge of the frame 174 abuts against the inlet region 137 of the cover 13. The other opposing sash 174 abuts against the corresponding side wall 132 of the hood 13, such that liquid entering from the water inlet 122 enters the filter 17 directly from the opening 1320. The impeller assembly 20 is housed in a separator 14, which includes an impeller 21 having a central bore 212, a shaft 23 mounted in a shaft seat 1430 of the top wall 143 of the partition 14, and a set of bearings 25 disposed on the shaft 23. The shaft 23 and the bearing 25 are received in the central hole 212 of the impeller 21. The impeller 21 includes a cylindrical hub 210 and a plurality of blades 211 extending outwardly from the end of the hub 210, and a permanent magnet 22 is embedded in the hub 210. The permanent magnet 22 has a hollow cylindrical shape and is provided with a plurality of staggered N poles and S poles. The impeller assembly 20 uses two pairs of annular flat magnetic rings 26-29 to control the axial positioning of the impeller 21. The magnetic rings 26 and 27 are sleeved on the rotating shaft 23 and the positions 11 1308941 are spaced apart from each other and disposed opposite to each other. The magnetic rings 28 and 29 are disposed under the bearing 25 and are disposed opposite to each other; the magnetic rings 27 and 29 are inserted. The upper and lower ends of the center hole 212 of the impeller 21 are placed and rotated with the impeller 21, and the magnetic ring 26 is seated at the end of the shaft seat 1430, and the magnetic ring 29 is seated in the recessed portion 134 of the top wall 130 of the cover body 13. The magnetic force formed between the two pairs of magnetic rings 26-29 balances the force of the liquid received by the impeller 21 in the axial direction and the gravity of the impeller 21 itself, so that the impeller 21 is in an equilibrium suspension state during operation. In the present invention, the partition 14, the cover 13, and the mounting plate 41 collectively divide the housing 10 into four chambers, namely, a first chamber 102, a second chamber 104, a third chamber 106, and a fourth chamber 108. . The first chamber 102 is surrounded by the inner wall of the partition body 14 and the top wall 130 of the cover body 13 for receiving the impeller group 20; the second chamber 104 surrounds the support column 136 of the cover body 13 and is sandwiched between the cover body The space between the top wall 130 of the 13 and the mounting plate 41, but does not include the cavity 1360 surrounded by the support column 136 of the cover 13 . In addition, the second chamber 104 further includes a gas storage chamber 18, the storage The air chamber 18 is surrounded by the outer wall of the filter 17 and the inner wall of the cover 13 for storing the gas escaping from the small hole 1704 of the filter 17; the third chamber 106 is for accommodating the heat absorbing body 40, which is a cavity 1360 and a space 45 located under the cavity 1360 and sandwiched between the mounting plate 41 and the base 16, the third cavity 106 communicating with the first cavity 102 through a through hole 135 above the cavity 1360, Thus, the two interconnected first and third chambers 102, 106 together form a working channel for the liquid. The water inlet 122 is located at a corresponding position of the second chamber 104, and the liquid enters the second chamber 104 from the water inlet 122; the water outlet 124 is located at a corresponding position of the first chamber 102, and is received in the first chamber 102. The impeller 21 flows out of the water outlet 124 by driving 12 1308941 liquid flowing into the first chamber 102; the fourth chamber 108 is located above the second receiving portion 142 of the partition 14 and surrounds the first receiving portion 140, the fourth chamber The chamber 108 is a closed chamber that surrounds the first chamber 102 and is isolated from the first, second and third chambers 102, 104, 106, respectively, and liquid cannot flow into the closed chamber, the fourth chamber 108 It is used to accommodate the driving unit 30. The drive unit 30 housed in the fourth chamber 108 includes a motor having a stator 32 and a circuit board 33 disposed on the top of the stator 32 and electrically coupled to the stator 32. The stator 32 is disposed on the outer wall of the first receiving portion 140 of the partition body 14 and cooperates with the protruding rib 144 of the outer wall, which is axially supported by the top wall of the second receiving portion 142 of the partition body 14 in the radial direction. The cylinder 11 in the body 12 abuts, and the stator 32 has a plurality of coils 320 wound around the stator 32. The circuit board 33 is placed on the top wall 143 of the divider 14 to provide a continuous current to the coil 320 of the given sub-32 to generate a magnetic field that urges the impeller 21 to rotate. The top cover 15 disposed on the top of the closed chamber is substantially square. The four corners of the top cover 15 are extended downwardly with pins 152 for engaging with the protrusions 120 of the body 12, so that the top cover 15 is mounted on the body 12. The top of the. An upward protrusion 150 protrudes upward from a middle portion of the top cover for accommodating and contacting the electronic component 330 on the circuit board 33 of the driving unit 30. The top cover 15 is made of a material having good thermal conductivity, and may be metal or non-metal. In the present embodiment, the material of the top cover 15 is aluminum for dissipating heat generated by the electronic component 330 on the circuit board 33. In order to ensure the close contact of the protruding portion 150 of the top cover 15 with the heat-generating electronic component 330, a compressible heat-conductive film 151 having a certain thickness is attached to the bottom portion 131308941 where the protruding portion 150 and the electronic component 330 are in contact with each other for improving The heat transfer between the top cover 15 and the electronic component 330 causes the heat generated by the electrical component 34 to deform the thermal conductive film 151 to fill the gap with the electronic component 330, so that the top cover 15 and the electronic component 330 Fully contact, use the large heat dissipation area of the top cover 15 to achieve the purpose of heat dissipation. When the present invention is used, the liquid is driven by the impeller 21 to flow from the water inlet 124 into the filter 17 placed in the second chamber 104, and the gas mixed into the liquid escapes from the small hole 1704 of the filter 17 as it passes through the filter 17. Stored in the gas storage chamber 18; the liquid flowing in the filter 17 flows out through the opening 1320 in the casing 13, and the heat is absorbed from the inlet region 137 of the casing 13 along the heat absorption due to the gravity of the liquid. The end edge of the body 40 flows into the third chamber 106. Since the base 16 is in close contact with the heat-generating electronic components on the circuit board, thereby absorbing heat generated by the electronic component, the base 16 absorbs heat and then passes into the third chamber 106. The liquid, the liquid flows through the passage 44 of the heat absorbing body 40 to perform large-area heat exchange with each of the bodies 42 of the heat absorbing body 40; then the liquid flows from the through hole 135 of the hood 13 into the first chamber 102 and finally through the centrifugal force of the impeller 21. It is pulled out from the water outlet 124; at the same time, the rotation of the impeller 21 is driven by the drive unit 30 located in the fourth closed chamber 108, and when the drive unit 30 is in operation, the electronic component 330 on the circuit board 33 generates a large amount of heat due to Top cover 1 The arrangement of 5 allows the heat generated by the electronic component 330 to be quickly transferred to the top cover 15, thereby rapidly dissipating heat from the circuit board 33 through the top cover 15 to the surrounding environment, thereby causing the temperature of the fourth closed chamber 108. It remains within the normal range without causing the temperature of the circuit board 33 of the drive unit 30 to be too high. As a result, the present invention can effectively avoid the phenomenon that the temperature of the circuit board 33 of the driving unit 30 is too high, thereby lowering the life of the circuit board 33 by using the circuit board 33 in the closed chamber. In summary, the present invention complies with the requirements of the invention patent, and submits a grief application according to law. However, the above is only for those who are better at knowing the skill of the present invention. In the case of 爰, '+凡凡^ 牡 依 依 依 依 依 依 依 依 依 依 依 、 、 、 、 、 Within the scope of the patent application. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded perspective view of a pump of the present invention. Figure 2 is a perspective assembled view of the pump of the present invention. Figure 3 is a cross-sectional view taken along line ιπ-πι in Figure 2. Figure 4 is an exploded perspective view of the heat absorbing body of Figure 1. Figure 5 is a perspective view of the cover in the middle. Figure 6 is a perspective view of the top cover of Figure 1. [Main component symbol description] Housing second chamber Fourth chamber body Seal ring Water outlet top wall side wall through hole recessed portion 10 104 108 12 121 124 130, 143, 132, 172 1322 134 First chamber third chamber Chamber cylindrical stud water inlet cover step opening card edge through hole 102 106 11 120 122 13 1302 , 1364 1320 1324 , 1326 15 135 1308941 support column 136 cavity 1360 raft 1362 inlet area 137 space 138 , 45 partition 14 The first receiving portion 140 the second receiving portion 142 the shaft seat 1430 the protruding rib 144 the top cover 15 the protruding portion 150 the thermal film 151 the pin 152 the base 16 the screw 162 the filter 17 the central hole 1702 the small hole 1704 the door frame 174, 175 the gas storage chamber 18 Impeller group 20 Impeller 21 Wheel 210 210 211 Center hole 212 Permanent magnet 22 Shaft 23 Bearing 25 Magnetic ring 26, 27, 28, 29 Drive unit 30 Stator 32 Coil 320 Circuit board 33 Electronic components 330 Heat sink 40 Mounting plate 41 Sheet 42 Slot 420 Heat Exchanger 421 Notch 422 Spacer 423 Groove 424 Channel 44 16