M305266 八、新型說明： 【新型所屬之技術領域】 本新型是有關於一種泵浦，特別是指一種運用在散熱 系統領域之微型泵浦。 【先前技術】 參閱圖1、2，為我國專利公告第587784號「液冷式散 熱系統的鼓式泵浦」新型專利案所揭露之鼓式泵浦i，該鼓 式泵廣1包含有-设體u、—設於該殼體U内且具有多數 片呈平板狀葉片117之風扇12、四個定子線圈、一輸入 管14，及一輸出管15。該殼體u是由一底座ηι及一封蓋 112組合而成，且兩者⑴、112相配合界定出—液流空間 110 〇 »亥底座111具有-基S 113、一位於該基壁113周緣之 圍壁114、-設於該基壁113上且可供該風扇12設置之固 定轴U5,及四分別對稱形成於該基壁ιΐ3底面之容置部 116(圖卜2皆因㈣關係只繪出兩個容置部116)。每一容 置部116皆與該液流空間110隔離不相連通，該四定子線圈 13則分別设置於對應之容置部〗丨6内。 當液體經由該殼體u上之輸入管14而進入到該液流空 二二:並不會渗出到該容置部116中，該四定子線圈 生磁/了甘到防水效果，而該四定子線圈13於通電時會產 生兹％，並且可穿透過該底座U1 120產生磁性互斥，進而;、4風扇12之磁鐵環 以對…“進而推動5亥風扇12之葉片117旋轉， 對4液 >瓜空間11 〇内六辦 内之流體賦予動能’使得液體產生一定 M305266 的流速後而自該殼體u上之輸出管15排出。 但是上述鼓式泵浦！於實際使用時，卻因為每一葉片 117的形狀概呈平板狀而非、、ώ / 丁杈狀而非机線形，使得液體經由該輸入管 U流入該液流空間m時’是直接與葉片117的平板部分 產生撞擊，其導流效果自然較差，導致液體容易於該液流 空間110内產生無謂的亂流，而不易提高其流速。 ^者’由於所述葉# 117已佔去該液流空間110大部分 • 體積，所以當所述葉片117持續轉動時，便容㈣致該液流 空間110的液體產生一定程度的高壓與氣泡，此現象會對所 述葉片117的轉動產生較大的阻力，進而影響其轉速，所述 葉片117便不易將更多的動能賦予至液體，液體之流速便無 法有效提高。 【新型内容】 因此，本新型之目的，即在提供一種可使液體快速且 順暢地流動’藉以提高其流速之微型泵浦。 • 於是，本新型之微型泵浦，包含一殼座、一頂封蓋、 一底封盖、一驅動早元，及' —轉動單元。 該殼座具有一環狀頂壁、一由該頂壁内緣向下延伸的 内圍繞壁，及由δ亥頂壁外緣向下延伸的外圍繞壁，該頂 封蓋係與該殼座之頂壁互相結合，且該頂封蓋、頂壁與内 圍繞壁相配合界定出一液流空間，該頂封蓋具有一可供液 體流入該液流空間之進液口’及一可供液體流出該液流空 間且高度低於該進液口之高度的出液口，該底封蓋係與該 冗又座之外圍繞壁互相結合’且該底封蓋、外圍繞壁、頂壁 M305266 與内圍繞壁相配人農中山_ 間，該驅動單元：有液流空間相隔離的容置空 二 早兀/、有一谷設於該容置空間内之定子組，及 ^子組電連接的電路板，該轉動單元具有—枢設於 間内且其頂端鄰近該進液口之樞抽、-固設於該 轴周、、泉且可被該定子組通電激磁而轉動之磁鐵環，及多 j片以螺旋態樣間隔環設於該樞轴頂部的弧板狀葉片，每 二：二f有一由其内頂緣處呈弧狀地向外且漸趨向下螺旋 延伸之導引面。 :新型之功效在於’藉由每一弧板狀葉片之導引面係 由葉片内頂緣處呈弧狀地漸趨向下且向外螺旋延伸之流線 形设計，配合螺旋排列之葉片持續旋轉所產生的離心力， 使得液體於該液流”時，能夠沿著該導引面快速、 地向下且向外流動，液體便不易於該液流空間内產… 的亂流；再者’液體於每兩葉片之間，因為被弧板狀葉: 所包圍環繞’所以不易向外逸散，同時可以充分吸收葉 旋轉拍擊所產生的動能，進而能夠有效提高液體 :、 【實施方式】 有關本新型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-較佳實施例的詳細說明中，將可、生 楚的呈現。 β 參閱圖3、4,本新型微型系浦2之較佳實施例，包含 有-殼座21、-頂封蓋22、—底封蓋23、—驅動單元μ :及-轉動單^5,其中，該驅動單元24與轉動單元h 係位於該殼座21内，故於圖3中讀出其結構，而於圖4 M305266 中表示，至於該微型泵浦2 —般是置放於一水槽中使用（圖 未示），故該殼座21、頂封蓋22、底封蓋23皆具有防水特 性，且此種使用方式為其所屬技術領域具有通常知識者容 易了解，故在此不加贅述。 一併參閱圖4、5，該殼座21具有一環狀頂壁211、一 由該頂壁211内緣向下延伸的内圍繞壁212、一由該頂壁 211外緣向下延伸的外圍繞壁213，及一封設於該内圍繞壁 • 212底緣之底壁214，其中，該外圍繞壁213具有一由該頂 • 壁211外緣向下延伸的周壁部215，及一由該周壁部215底 緣向外延伸且其外周緣概呈矩形的基壁部216。 該頂封蓋22係與該殼座21之頂壁211互相結合，且該 頂封蓋22、頂壁211、内圍繞壁212與底壁214相配合界定 出一液流空間26，該底壁214具有分別連通該液流空間26 之一排液孔217與一排氣孔218，該排液孔217之孔徑略大 於該排氣孔218之孔徑。 φ 该頂封蓋22具有一可供液體流入該液流空間26之進 液口 221 ’及一可供液體流出該液流空間26且高度低於該 進液口 221之高度的出液口 222,其中，該進液口 221係位 於邊頂封蓋22之中央位置，並且與一輸入管223相連通， 该出液口 222則位於該頂封蓋22之周緣位置，並且與一輸 出管224相連通。 該底封蓋23係與該外圍繞壁213的基壁部216互相結 ^ 且5亥底封蓋23、外圍繞壁213、頂壁211與内圍繞壁 212相配合界定出一與該液流空間％相隔離的容置空間27 M305266 ，該底封蓋23本身則界定出一承接空間230，而該底壁 214之排液孔217與排氣孔218皆與該承接空間230相連通 〇 該底封蓋23具有一由其底面向内凹陷之導槽231，及 間隔設於該導槽231内且分別連通該承接空間230之一副 排液孔232與一副排氣孔233，該副排液孔232之孔徑略大 於該副排氣孔233之孔徑，該副排液孔232與副排氣孔233 則分別位於該排液孔217與排氣孔218之相對位置，且該 導槽231之其中一端延伸至該底封蓋23侧緣並呈開放狀， 藉此设什’當該微型泵浦2置放於平面上時，該液流空間 26中的液體與空氣可分別經由該排液孔217、副排液孔232 ，以及排氣孔218、副排氣孔233向外排出，並沿著該導槽 231流動至外界空間。 該驅動單元24具有一容設於該容置空間27内之定子 組241 ’及一與該定子組241電連接的電路板242，其中， 該定子組241與電路板242皆是習知結構，故在此不加以 贅述。 該轉動單元25具有一樞設於該液流空間26内且其頂 女而钟近4進液口 221之樞軸251、一固設於該樞軸251周緣 且可被该定子組241通電激磁而轉動之磁鐵環252，及多數 片以螺方疋態樣間隔環設於該樞軸251頂部的弧板狀葉片253 ’其中’該柩軸251係樞設於該殼座21之底壁214上，而 母葉片253具有一由其内頂緣處呈弧狀地向外且漸趨向 下螺旋延伸之導引面254。 M305266 當該電路板242經由外部電源供電後，即可將電能傳 遞至该疋子組241，該定子組241便會通電激磁而與該轉動 單元25之磁鐵環252產生磁性互斥作用，進而驅動該磁鐵 環252轉動，並且同時帶動該樞軸251與葉片253都隨之 產生旋轉運動。 藉由上述設計，本新型微型泵浦2於實際使用時具有 以下所述之優點： (1)提咼液體流出該液流空間26時的流速： 藉由每一弧板狀葉片253之導引面254係由葉片253 内頂緣處呈弧狀地漸趨向下且向外螺旋延伸之流線形設計 ，配合螺旋排列之葉片253持續旋轉所產生的離心力，使 得液體由該進液口 221流入該液流空間26時，能夠沿著該 導引面254快速、順暢地向下流動，同時也藉著離心力的 作用將液體由葉片253螺旋中央位置快速地導向葉片253 外緣末端位置（液體之流向如圖5中假想線所示），藉由上述 設計，使得該微型泵浦2之導流效果相當良好，液體便不 易於該液流空間26内產生無謂的亂流。 再者，因為葉片253不斷地旋轉，位於每兩葉片253 之間的液體因為被弧板狀葉片253所包圍環繞，所以不易 向外逸散，同時能夠充分吸收葉片253旋轉拍擊所產生的 動能’進而能夠有效提高液體之流速。 (2)降低所述葉片253轉動時所遭受之阻力·· 因為該液流空間26容易於葉片253旋轉時產生高壓液 體與氣泡，導致液體之流動性不佳，所以本新型藉由設置 10 M305266 於該底壁214上之排液孔217以及排氣孔218，使積存於該 内圍繞壁212與磁鐵環252之隙缝内的高壓液體及氣泡， 分別經由該排液孔217與排氣孔218導出該液流空間20之 外；同時，由於該副排液孔232與副排氣孔233分別位於 該排液孔217與排氣孔218之相對位置，故高壓液體與氣 泡皆能分別迅速地經由副排液孔232、副排氣孔233、導槽 231而排出該微型泵浦2外。藉由上述方式，該液流空間M305266 VIII. New description: [New technical field] The new type is related to a pump, especially a micro pump used in the field of heat dissipation systems. [Prior Art] Referring to Figures 1 and 2, the drum pump i disclosed in the new patent application No. 587784, "Drum Pumping of Liquid-Cooled Heat Dissipating System", the drum pump 1 includes - The body u is disposed in the casing U and has a fan 12 having a plurality of flat blades 117, four stator coils, an input pipe 14, and an output pipe 15. The housing u is composed of a base ηι and a cover 112, and the two (1), 112 cooperate to define a flow space 110 亥 亥 亥 亥 底座 111 111 具有 具有 具有 亥 亥 亥 113 113 113 a peripheral wall 114, a fixed axis U5 provided on the base wall 113 and provided by the fan 12, and four symmetry portions 116 respectively formed on the bottom surface of the base wall ι3 (Fig. 2 is due to the relationship between (4) Only two accommodating portions 116) are drawn. Each of the accommodating portions 116 is not in communication with the liquid flow space 110, and the four stator coils 13 are respectively disposed in the corresponding accommodating portions 丨6. When the liquid enters the liquid flow through the input pipe 14 on the casing u: it does not ooze out into the accommodating portion 116, and the four-stator coil is magnetized/cored to a waterproof effect, and the The four-stator coil 13 generates a % of the current when it is energized, and can penetrate the base U1 120 to generate a magnetic mutual repulsion. Further, the magnet ring of the fan 12 rotates the blade 117 of the 5th fan 12 to 4 liquid > melon space 11 The fluid in the six chambers gives the kinetic energy 'to make the liquid flow at a certain flow rate of M305266 and then discharges from the output tube 15 on the casing u. But the above drum pump! In actual use, However, since the shape of each of the blades 117 is substantially flat rather than, ώ / 杈 杈 rather than linear, so that liquid flows into the liquid flow space m through the input pipe U 'is directly generated with the flat portion of the blade 117 The impact of the impinging effect is naturally poor, which causes the liquid to easily generate unnecessary turbulent flow in the liquid flow space 110, and it is not easy to increase the flow rate. ^ Because the leaf #117 has taken up most of the liquid flow space 110 • volume, so when the blade 117 continues When moving, it is convenient (4) that the liquid in the liquid flow space 110 generates a certain degree of high pressure and air bubbles, which may cause a large resistance to the rotation of the blade 117, thereby affecting the rotational speed thereof, and the blade 117 is not easy to be More kinetic energy is imparted to the liquid, and the flow rate of the liquid cannot be effectively increased. [New content] Therefore, the object of the present invention is to provide a micropump that can quickly and smoothly flow a liquid to increase its flow rate. Thus, the micro pump of the present invention comprises a housing, a top cover, a bottom cover, a driving element, and a 'rotating unit. The housing has an annular top wall and a top wall An inner surrounding wall extending downwardly from the inner edge, and an outer surrounding wall extending downward from an outer edge of the δ hai ceiling wall, the top sealing cover is coupled with the top wall of the housing, and the top cover and the top wall are The inner surrounding wall cooperates to define a liquid flow space, the top cover has a liquid inlet port for allowing liquid to flow into the liquid flow space, and a liquid can flow out of the liquid flow space and the height is lower than the liquid inlet Height outlet, the bottom cover The redundant cover and the surrounding wall are combined with each other' and the bottom cover, the outer surrounding wall, the top wall M305266 and the inner surrounding wall are matched with each other. The driving unit: the storage space is separated from the liquid space. Early 兀/, a stator set in the accommodating space, and a circuit board electrically connected to the sub-group, the rotating unit has a pivoting center and a top end adjacent to the liquid inlet, a magnet ring fixed on the circumference of the shaft, spring, and rotatable by the stator group, and a plurality of j-shaped blades arranged in a spiral manner at the top of the pivot shaft, each two: two f There is a guiding surface which is curved outwardly from the inner top edge and gradually spirals downward. The new effect is that the guiding surface of each arc-shaped blade is represented by the top edge of the blade. a streamlined design that gradually descends downwardly and spirally outwardly, and cooperates with the centrifugal force generated by the continuous rotation of the spirally arranged blades so that the liquid can rapidly and downwardly follow the guiding surface along the guiding surface And flowing outward, the liquid is not easy to turbulent flow in the liquid flow space; Furthermore, 'liquid is between every two blades, because it is surrounded by arc-shaped leaves: it is not easy to escape outward. At the same time, it can fully absorb the kinetic energy generated by the rotation of the leaf, which can effectively improve the liquid: The above-mentioned and other technical contents, features and effects of the present invention will be presented in the following detailed description of the preferred embodiments with reference to the drawings. Referring to Figures 3 and 4, a preferred embodiment of the novel micro-system 2 includes a housing-shell 21, a top cover 22, a bottom cover 23, a drive unit μ: and a rotary unit 5, Wherein, the driving unit 24 and the rotating unit h are located in the housing 21, so the structure is read out in FIG. 3, and is shown in FIG. 4 M305266, and the micropump 2 is generally placed in a sink. The housing 21, the top cover 22, and the bottom cover 23 all have waterproof characteristics, and the manner of use is easily understood by those skilled in the art, so it is not added here. Narration. Referring to Figures 4 and 5, the housing 21 has an annular top wall 211, an inner surrounding wall 212 extending downward from the inner edge of the top wall 211, and an outer downward extending edge from the outer edge of the top wall 211. a surrounding wall 213, and a bottom wall 214 disposed on the bottom edge of the inner surrounding wall 212, wherein the outer surrounding wall 213 has a peripheral wall portion 215 extending downward from the outer edge of the top wall 211, and a The bottom edge of the peripheral wall portion 215 extends outwardly and the outer peripheral edge thereof has a rectangular base wall portion 216. The top cover 22 is coupled to the top wall 211 of the housing 21, and the top cover 22, the top wall 211, and the inner surrounding wall 212 cooperate with the bottom wall 214 to define a flow space 26, the bottom wall The 214 has a drain hole 217 and a vent hole 218 respectively communicating with the liquid flow space 26, and the hole diameter of the drain hole 217 is slightly larger than the diameter of the vent hole 218. φ The top cover 22 has a liquid inlet 221 ′ for liquid to flow into the liquid flow space 26 and a liquid outlet 222 for allowing liquid to flow out of the liquid flow space 26 and having a height lower than the height of the liquid inlet 221 . The liquid inlet 221 is located at a central position of the top cover 22 and is in communication with an input pipe 223. The liquid outlet 222 is located at a peripheral position of the top cover 22 and is connected to an output pipe 224. Connected. The bottom cover 23 is coupled with the base wall portion 216 of the outer surrounding wall 213, and the bottom cover 23, the outer surrounding wall 213, and the top wall 211 cooperate with the inner surrounding wall 212 to define a flow. The space is separated from the receiving space 27 M305266, and the bottom cover 23 itself defines a receiving space 230, and the liquid discharging hole 217 and the exhaust hole 218 of the bottom wall 214 are connected to the receiving space 230. The bottom cover 23 has a guiding groove 231 recessed from the bottom surface thereof, and is spaced apart from the guiding groove 231 and communicates with one of the sub-discharging holes 232 and one pair of exhaust holes 233 of the receiving space 230, respectively. The aperture of the drainage hole 232 is slightly larger than the aperture of the secondary exhaust hole 233, and the secondary drain hole 232 and the secondary exhaust hole 233 are respectively located at opposite positions of the drain hole 217 and the exhaust hole 218, and the guide groove One end of the 231 extends to the side edge of the bottom cover 23 and is open, thereby providing that when the micropump 2 is placed on a plane, the liquid and air in the flow space 26 can pass through the The drain hole 217, the auxiliary drain hole 232, and the exhaust hole 218 and the auxiliary exhaust hole 233 are discharged outward and flow along the guide groove 231 to Community space. The driving unit 24 has a stator assembly 241 ′ disposed in the accommodating space 27 and a circuit board 242 electrically connected to the stator assembly 241 . The stator assembly 241 and the circuit board 242 are conventional structures. Therefore, it will not be repeated here. The rotating unit 25 has a pivot 251 pivoted in the liquid flow space 26 and has a top end 4 and a liquid inlet 221, and is fixed to the periphery of the pivot 251 and can be energized by the stator set 241. The rotating magnet ring 252 and the plurality of pieces are arranged in a spiral manner to form an arc-shaped blade 253 ′ at the top of the pivot 251. The yoke 251 is pivotally disposed on the bottom wall 214 of the housing 21 . Above, the female blade 253 has a guiding surface 254 which is curved outwardly from the inner top edge and gradually spirals downward. M305266, when the circuit board 242 is powered by an external power source, the electric energy can be transmitted to the die set 241, and the stator set 241 is energized to generate magnetic mutual repulsion with the magnet ring 252 of the rotating unit 25, thereby driving The magnet ring 252 rotates and simultaneously drives the pivot 251 and the blade 253 to rotate. With the above design, the novel micropump 2 has the following advantages in practical use: (1) Flow rate when the liquid is discharged from the liquid flow space 26: guided by each arc-shaped blade 253 The surface 254 is a streamlined design that gradually and downwardly spirally extends from the top edge of the blade 253 in an arc shape, and the centrifugal force generated by the continuous rotation of the spirally arranged blade 253 causes the liquid to flow from the liquid inlet 221 When the liquid flow space 26 is opened, it can flow down smoothly along the guiding surface 254, and at the same time, the liquid is quickly guided from the central position of the blade 253 to the outer edge of the blade 253 by the action of the centrifugal force (the flow of the liquid) As shown by the imaginary line in Fig. 5, with the above design, the diversion effect of the micropump 2 is quite good, and the liquid does not easily cause unnecessary turbulence in the liquid flow space 26. Moreover, since the blade 253 is continuously rotated, the liquid located between each of the two blades 253 is surrounded by the arc-shaped blade 253, so that it is not easily escaped outward, and at the same time, the kinetic energy generated by the rotation of the blade 253 can be sufficiently absorbed. 'In turn, the flow rate of the liquid can be effectively increased. (2) Reducing the resistance experienced when the blade 253 is rotated. · Because the liquid flow space 26 is easy to generate high-pressure liquid and air bubbles when the blade 253 rotates, resulting in poor fluidity of the liquid, the present invention is provided by setting 10 M305266 The liquid discharge hole 217 and the exhaust hole 218 on the bottom wall 214 allow high-pressure liquid and air bubbles accumulated in the gap between the inner surrounding wall 212 and the magnet ring 252 to pass through the liquid discharge hole 217 and the exhaust hole 218, respectively. The second liquid discharge hole 232 and the auxiliary air discharge hole 233 are respectively located at the opposite positions of the liquid discharge hole 217 and the air discharge hole 218, so that the high pressure liquid and the air bubble can be rapidly and separately The micropump 2 is discharged through the sub-discharge hole 232, the sub-exhaust hole 233, and the guide groove 231. In the above manner, the flow space
26内的液體便可保持一定的流動性，降低葉片轉動時 所遭受之阻力。 田上述之說明可知，本新型微型泵浦2,藉由每一葉片 253之導引面254呈弧狀流線形設計、配合螺旋排列之葉片 持、只旋轉所產生的離心力，以及該排液孔副排液 孔加、排氣孔218、副排氣孔233之設置，藉由上述特徵 手段’不但可提高液體流出該液流空間26時的流速，而且 也:夠降低所述葉# 253轉動時所遭受之阻力，因此可有 功：门亥U型泵浦2之運轉效率，故確實能達到本新型之 处、丨 ，，•丨土〜干又，丨王員她例而已，當不 月匕以此限定本新型實 範圍及新型說明内凡:本新型申請專利 屬本新型專利涵蓋之範圍内。早心化與修部’皆仍 【圖式簡單說明】 圖1是一立體分解圖 液冷式散熱系統的鼓式 ’说明我國專利公告第587784號 泵浦」新型專利案所揭露之鼓式 11 ⑧ M305266 泵浦； 之鼓式泵浦 圖2疋組合剖視圖，辅助說明圖1所示 的組合態樣； 圖3疋A體外觀圖，說明本新型微型果浦 &例中•動單元與轉動單元係位於殼座内 不另外繪出； s文’略 圖 4 是_ # 分解態樣； 分解圖’說明該較佳實施例之大部構件 ，及 圖5是一組合剖視圖 例的組合態樣。 輔助說明圖4所示之較佳實施The liquid in 26 maintains a certain degree of fluidity and reduces the resistance experienced by the blade as it rotates. According to the above description, the micropump 2 of the present invention has an arc-shaped streamlined design by the guiding surface 254 of each blade 253, a centrifugal force of the blade, a centrifugal force generated by only rotating, and the drainage hole. The arrangement of the secondary drain hole, the vent hole 218, and the auxiliary vent 233, by the above-mentioned characteristic means, can not only increase the flow rate when the liquid flows out of the liquid flow space 26, but also: reduce the rotation of the leaf #253 The resistance suffered by the time, so it can be useful: the operation efficiency of the door-type U-type pump 2, so it can really reach this new place, 丨,, 丨 〜 ~ dry and 丨 丨 员 她 她 她 她 她 她 她 她 她 她匕 This is to limit the scope of this new type and the new type of description: The patent application of this new type is within the scope of this new patent. Early heart and repairs are still [simplified illustration] Figure 1 is a three-dimensional exploded view of the liquid-cooled cooling system drum type 'Description of China Patent Patent No. 587784 Pumps' new patent case disclosed drum type 11 8 M305266 pump; drum pump Figure 2 疋 combination sectional view, to help explain the combination of the Figure 1; Figure 3 疋 A body appearance, illustrating the new micro-Pusage & The unit is not additionally depicted in the housing; s text 'slightly 4 is _ # decomposition state; exploded view' illustrates the majority of the components of the preferred embodiment, and FIG. 5 is a combined view of a combined cross-sectional view. Auxiliary description of the preferred implementation shown in Figure 4.
12 ⑧ M30526612 8 M305266
【主要元件符號說明】 2 微型泵浦 23 底封蓋 21 殼座 230 承接空間 211 頂壁 231 導槽 212 内圍繞壁 232 副排液孔 213 外圍繞壁 233 副排氣孔 214 底壁 24 驅動單元 215 周壁部 241 定子組 216 基壁部 242 電路板 217 排液孔 25 轉動單元 218 排氣孔 251 樞軸 22 頂封蓋 252 磁鐵環 221 進液口 253 葉片 222 出液口 254 導引面 223 輸入管 26 液流空間 224 輸出管 27 容置空間 13[Main component symbol description] 2 Micro pump 23 Bottom cover 21 Housing 230 Covering space 211 Top wall 231 Guide groove 212 Inner surrounding wall 232 Secondary drain hole 213 Outer surrounding wall 233 Secondary exhaust hole 214 Bottom wall 24 Drive unit 215 Peripheral wall portion 241 Stator group 216 Base wall portion 242 Circuit board 217 Drain hole 25 Rotating unit 218 Vent hole 251 Pivot 22 Top cover 252 Magnet ring 221 Inlet port 253 Blade 222 Outlet port 254 Guide surface 223 Input Tube 26 liquid flow space 224 output tube 27 housing space 13