200831780 九、發明說明： 【發明所屬之技術領域3 發明領域 本發明係有關於一種液體供給裝置。 5 【先前技 發明背景200831780 IX. Description of the Invention: [Technical Field 3 of the Invention] Field of the Invention The present invention relates to a liquid supply device. 5 [Previous technical background]
為了供給特別像是塗料等高黏度液體，因而利用使用 有注射泵之裝置。習知注射泵中，是利用活塞後退，降低 注射裔内的壓力來吸入液體。由於南黏度液體不容易流入 10 注射器内，而會在注射器内會產生大的負壓，且因為配管 的接合等吸入外部空氣，因而發生溶解於液體中之氣體氣 泡化的情形。如此的氣泡，會發生液體的供給量不均，而 導致後程序產率降低等不良的問題。 專利文獻1中，揭示一種藉由加壓注射泵吸入側之液 15 體，使該液體不低於大氣壓以下之技術，但在最初氣泡混 入該液體的情形下，則無法防止吐出混入有氣泡之液體。 【專利文獻1】日本公開公報第8-182951號 【專利文獻2】日本公開公報第2003-56667號 【專利文獻3】日本公開公報第5-285436號 20 【發明内容】 發明概要 有鑒於前述問題點，本發明係提供一種不使氣泡混入 欲吐出之液體之液體供給裝置。 為解決前述問題點，本發明之液體供給裝置，包含有： 5 200831780 供給槽，可加壓所儲存之液體；注射泵，以注射器與活塞 形成内部空間，藉由前述液體壓力使前述活塞後退，再自 丽述供給槽將前述液體導入前述内部空間，並可藉由前述 活基的前進’自前述内部空間吐出前述液體；切換閥，自 5 $述供給槽，使前述注射泵之内部空間連通用以將前述液 體導入前述内部空間之吸入流路、及用以將前述液體送出 外部之吐出流路的任一者；驅動機構，具有可在前述活塞 月;j進方向及後退方向移動且抵接於前述活塞外侧，且可使 前述活塞前進之推進器；感測器，可自前述推進器在一定距 10離以内檢測出前述活塞；及控制機構，在前述感測器自前述 推進器在一定距離以内無法檢測出前述活塞的狀態為相較 於前述猶豫時間持續更長時間時，停止前述推進器動作。 藉由此構造，液體在推進器後退時，會因為本身的壓 力而使活塞退後，並流入注射泵内。此時，由於液體一旦 15混入有氣泡，則會因為氣泡的壓縮性，使注射泵後退的速 度降低，故可藉由感測器監視相對於推進器的後退之活塞 後退的延遲，以檢測出氣泡的混入，且，由於可在檢測出 氣泡混入時停止推進器的動作，故不會從注射泵吐出混入 有氣泡之液體。 20 又，本發明之液體供給震置，其中前述控制機構使前 述推進器以預定速度後退，且在前述感測器無法自前述推 進器在一定距離以内檢測出前述活塞時，暫時停止前述推 進器，並且若前述感測器自前述推進器在一定距離以内， 無法在猶豫時間内再度檢測出前述活塞，則使前述推進器 6 200831780 再度以前述預定速度後退，又，若前述感測器自前述推進 器在一定距離以内無法在前述猶豫時間内再度檢測出前述 活塞，則停止前述推進器。 藉由此構造，由於可逐次監視活塞後退速度、並監視 5 氣泡混入，故可在活塞行程途中檢測出氣泡的混入並停止 該裝置。In order to supply a highly viscous liquid such as a paint, a device using a syringe pump is used. In the conventional syringe pump, the piston is retracted to reduce the pressure in the injection to absorb the liquid. Since the south viscosity liquid does not easily flow into the inside of the syringe, a large negative pressure is generated in the syringe, and the outside air is taken in by the engagement of the pipe or the like, so that the gas dissolved in the liquid is bubbled. Such a bubble causes a problem that the supply amount of the liquid is uneven, which causes a problem such as a decrease in the post-procedure yield. Patent Document 1 discloses a technique in which the liquid 15 on the suction side of the syringe pump is pressurized so that the liquid is not lower than atmospheric pressure. However, when the first bubble is mixed with the liquid, it is impossible to prevent the bubble from being mixed. liquid. [Patent Document 1] Japanese Laid-Open Patent Publication No. 8-182951 [Patent Document 2] Japanese Laid-Open Patent Publication No. 2003-56667 [Patent Document 3] Japanese Laid-Open Publication No. 5-285436 No. In one aspect, the present invention provides a liquid supply device that does not allow bubbles to be mixed into a liquid to be discharged. In order to solve the above problems, the liquid supply device of the present invention comprises: 5 200831780 a supply tank for pressurizing the stored liquid; and a syringe pump for forming an internal space by the syringe and the piston, wherein the piston is retracted by the liquid pressure, Further, the liquid is introduced into the inner space from the supply tank, and the liquid can be discharged from the inner space by the advancement of the living group; the switching valve is supplied from the tank to the inner space of the syringe pump. Generally, the suction flow path for introducing the liquid into the internal space and the discharge flow path for sending the liquid to the outside; the drive mechanism is movable in the forward direction and the backward direction of the piston; a propeller connected to the outside of the piston and capable of advancing the piston; a sensor capable of detecting the piston from a distance of 10 degrees from the propeller; and a control mechanism in which the sensor is from the propeller If the state of the piston is not detected within a certain distance, the propulsion is stopped when the hesitation time lasts longer than the above-mentioned hesitation time. Work. With this configuration, when the propeller retreats, the piston will retreat due to its own pressure and flow into the syringe pump. At this time, since the liquid 15 is mixed with air bubbles, the speed of the retraction of the syringe pump is lowered due to the compressibility of the air bubbles, so that the delay of the piston retreat with respect to the retreat of the propeller can be monitored by the sensor to detect The air bubbles are mixed, and since the movement of the pusher can be stopped when the air bubbles are mixed, the liquid in which the air bubbles are mixed is not discharged from the syringe pump. Further, the liquid supply of the present invention is shocked, wherein the control mechanism retracts the thruster at a predetermined speed, and temporarily stops the thruster when the sensor cannot detect the piston within a certain distance from the thruster. And if the sensor is unable to detect the piston again within a certain period of time from the thruster, the thruster 6 200831780 is again retracted at the predetermined speed, and if the sensor is from the foregoing When the thruster cannot detect the piston again within a certain period of time within a certain distance, the thruster is stopped. With this configuration, since the piston retreating speed can be monitored one by one and the air bubbles are mixed, it is possible to detect the incorporation of air bubbles in the middle of the piston stroke and stop the device.
又，本發明之液體供給裝置，其中前述控制機構亦可 在前述感測器經過前述猶豫時間後、並且在經過預定判別 時間前，前述感測器自前述推進器在一定距離以内檢測出 10 前述活塞時，判斷為前述液體中混入有氣泡。 由於氣泡壓縮性所形成之活塞後退延遲會回復到一定 範圍内，故藉此構造，活塞的延遲可判別為因為氣泡混入 所造成或其他問題所造成者。 如上所述，藉由本發明，可藉由加壓液體、利用液體 15 壓力使活塞後退，且以感測器檢測出氣泡混入時所產生的 活塞後退延遲，來停止動作而不吐出混入有氣泡之液體。 圖式簡單說明 【第1圖】係本發明1個實施型態之液體供給裝置概略 圖。 20 【第2圖】係第1圖注射泵之詳細圖。 【第3圖】係顯示第2圖注射泵的活塞移動時之詳細圖。 【第4圖】係顯示第2圖注射泵氣泡混入時之詳細圖。 【第5圖】係顯示黏性流體壓力傳達之模式圖。 【第6圖】係顯示第5圖的模式中壓力的變化圖。 7 200831780 【第7圖】係第i圖之液體供給裝置中液體吸 流程圖。 ^ 【第8圖】係第7圖替代之液體吸入動作流程圖。 t實施方式3 5 較佳實施例之詳細說明 在此’參考圖示說明本發明之實施型態。 第1圖顯示本發明第1實施型態之液體供給裝置1概 要。液體供給裝置卜包含有：儲存槽2 1以儲存液體例 如黏度2500〜450〇cps之塗料L ;注射系3，可自儲存槽2以預 10定流量（例如，50〇〜lOOOcc/min)供給至例如塗裝裝置^消耗 液體L之外部供給目的地；及驅動機構4，用以驅動注射泵p 儲存槽2,係做成密閉構造，導入預定壓力（例如， 0.5MPa)的Μ縮空氣至液體L的上部空間，並加壓所儲存之 液體L。 15 液體L，可自設置於儲存槽2下端之吸入流路5，透過切 換閥6及共用流路7導入注射泵3。切換閥6為三方閥，並做 成可k擇性地使共通流路7連通至吸入流路^及供給目的地 之吐出流路8任一者。 一射系3 ’包含有··注射器9，一端連接至共用流路7 且内位例如_mm ;及活塞η，區分注射器9内部，形成 、連L至共通流路7之内部空間，又，活塞1卜具有延 伸至注射器9之棒12。 …驅動機構4 ’可藉由馬達I3,使推進器14在與活塞11的 "動向相同方向移動’且可抵接於活塞11外側，即，在 200831780 棒12後端抵接推進器14 ’再將活塞11押入注射器9内側（前 進方向）。又，驅動機構4，包含有控制裝置16，控制裝置 16是藉由配設於推進器14之感測器15，確認棒12後端是否 位於推進器14預定範圍以内’並視感測器u的輸出來控制 5 馬達13。Furthermore, in the liquid supply device of the present invention, the control means may detect the sensor 10 from the thruster within a certain distance after the sensor has passed the aforementioned hesitation time and before the predetermined determination time elapses. In the case of the piston, it was judged that bubbles were mixed in the liquid. Since the piston recoil delay due to the bubble compressibility is restored to a certain range, the delay of the piston can be judged to be caused by air bubbles or other problems. As described above, according to the present invention, the piston can be retracted by the pressurized liquid, the pressure of the liquid 15 is used, and the piston retreat delay generated when the bubble is mixed is detected by the sensor to stop the operation without spitting out the bubble. liquid. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a liquid supply device of one embodiment of the present invention. 20 [Fig. 2] is a detailed view of the syringe pump of Fig. 1. [Fig. 3] is a detailed view showing the movement of the piston of the syringe pump of Fig. 2. [Fig. 4] shows a detailed view of the bubble injection of the syringe pump in Fig. 2. [Fig. 5] shows a pattern diagram of viscous fluid pressure transmission. [Fig. 6] A graph showing changes in pressure in the mode of Fig. 5. 7 200831780 [Fig. 7] is a flow chart of liquid suction in the liquid supply device of Fig. i. ^ [Fig. 8] is a flow chart of the liquid inhalation action replaced by Fig. 7. tEmbodiment 3 5 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT(A) The present invention is described with reference to the drawings. Fig. 1 shows an outline of a liquid supply device 1 according to a first embodiment of the present invention. The liquid supply device includes: a storage tank 2 1 for storing a liquid such as a coating L having a viscosity of 2500 to 450 〇 cps; and an injection system 3 capable of being supplied from the storage tank 2 at a predetermined flow rate (for example, 50 〇 to 1000 cc/min). For example, the coating device consuming the external supply destination of the liquid L; and the driving mechanism 4 for driving the syringe pump p storage tank 2 to form a sealed structure, and introducing a contraction air of a predetermined pressure (for example, 0.5 MPa) to The upper space of the liquid L is pressurized and the stored liquid L is pressurized. The liquid L can be introduced into the suction pump 5 through the switching valve 6 and the common flow path 7 through the suction flow path 5 provided at the lower end of the storage tank 2. The switching valve 6 is a three-way valve, and is configured to selectively connect the common flow path 7 to either the suction flow path and the discharge flow path 8 of the supply destination. The first injection system 3' includes a syringe 9 having one end connected to the common flow path 7 and having an internal position such as _mm; and a piston η, which distinguishes the inside of the syringe 9 to form and connect L to the internal space of the common flow path 7, and The piston 1 has a rod 12 that extends to the syringe 9. The drive mechanism 4' can move the propeller 14 in the same direction as the "moving direction" of the piston 11 by the motor I3 and can abut against the outside of the piston 11, that is, at the rear end of the rod 12 in the 200831780 rod 12 abuts the propeller 14' The piston 11 is then pushed into the inside of the syringe 9 (forward direction). Further, the drive mechanism 4 includes a control device 16 which is provided by the sensor 15 disposed on the pusher 14 to confirm whether the rear end of the rod 12 is within a predetermined range of the pusher 14 'and the sensor u The output is used to control the 5 motor 13.
第2圖顯示注射泵3及驅動機構4的詳細構造。驅動機構 4 ’係利用藉馬達13旋轉之進料螺桿17，分別以預定速度(例 如，後退方向200〜600mm/min ;前進方向1〇〇〜 200mm/min)，使推進器14朝前進方向或後退方向移動（自注 10射泵9拉出活塞11的方向）。該推進器14的後退速度，係設 定成在供給槽12加壓之液體L在藉由其壓力使活塞η後退 的同時與流入注射泵9内部空間10的速度約略一致。推進器 14中設置有可接收棒12後端之座18，且，感測器15可例如 為在棒12後端位於座18中時，用以輸出電位之光電感測器。 15 一旦藉由切換閥6使共用流路7連通至吸入流路5，則藉 供給槽12所加壓之液體L會按壓活塞11。此時，棒12後端只 要抵接推進器14,則推進器14會與液體L的壓力抗衡，而使 活塞11停留在此處，但如第3圖所示，驅動機構4使推進器 14後退，則活塞η會因為液體l的壓力而後退。若液體L的 20壓力充分大，活塞11會與推進器14的後退一致，且以相同 的速度後退。 如第4圖所示，由於一旦液體l中混入氣泡β，則會因 為氣泡Β的收縮從供給槽2傳播，而使傳遞至活塞η的壓力 減壓，故活塞11的後退會產生延遲。 9 200831780 第5圖中顯示黏性流體的壓力傳播模式。如圖所干，將 填充有黏性㈣之管路分_2關力設定為ρι、ρ2。如第 6圖= 示，從管路-方對韻施加壓力，上游㈣壓力^ 上㈣’下游側的壓力P2會猶微延遲上昇。即 ρι、Fig. 2 shows the detailed construction of the syringe pump 3 and the drive mechanism 4. The driving mechanism 4' utilizes the feed screw 17 rotated by the motor 13, respectively, at a predetermined speed (for example, a retreating direction of 200 to 600 mm/min; a forward direction of 1 〇〇 to 200 mm/min) to cause the pusher 14 to move forward or Move in the reverse direction (the direction in which the pump 11 is pulled out of the piston 11). The retreating speed of the pusher 14 is set such that the liquid L pressurized in the supply tank 12 approximately retreats with the speed of the inflow of the internal space 10 of the syringe pump 9 while the piston n is retracted by the pressure thereof. The pusher 14 is provided with a seat 18 that receives the rear end of the rod 12, and the sensor 15 can be, for example, a photo-electrical sensor for outputting potential when the rear end of the rod 12 is in the seat 18. When the common flow path 7 is communicated to the suction flow path 5 by the switching valve 6, the liquid L pressurized by the supply groove 12 presses the piston 11. At this time, as long as the rear end of the rod 12 abuts against the pusher 14, the pusher 14 will compete with the pressure of the liquid L, and the piston 11 stays there, but as shown in Fig. 3, the drive mechanism 4 causes the pusher 14 When retreating, the piston η will retreat due to the pressure of the liquid l. If the pressure of the liquid L 20 is sufficiently large, the piston 11 will coincide with the retreat of the pusher 14, and will retreat at the same speed. As shown in Fig. 4, when the bubble β is mixed into the liquid 1, the contraction of the bubble enthalpy propagates from the supply tank 2, and the pressure transmitted to the piston η is decompressed, so that the retreat of the piston 11 is delayed. 9 200831780 Figure 5 shows the pressure propagation mode of viscous fluids. As shown in the figure, the pipe line filled with viscous (4) is set to ρι, ρ2. As shown in Fig. 6 =, the pressure from the pipe-to-side rhyme is applied, and the pressure P2 on the downstream side of the upstream (four) pressure ^ (four)' is delayed by a slight delay. That is, ρι,
P2女定，也會因為管路中的壓力彳H 刀_使下游側的壓力Ρ2 稍微停留在低於上游側的壓力Ρ1的壓力。P2 female, also because of the pressure in the pipeline 彳 H knife _ so that the downstream pressure Ρ 2 slightly stays below the pressure Ρ 1 of the upstream side.
弟6圖中係以該液體[混入有氣泡料下游側的壓力作 為打，表示。如圖所示，氣、泡會因為壓力的上升而收縮，且 由於會減少液體L外觀上的體積，因而相較於無氣泡時的壓 0力打，下游側壓力Ρ2’的上升而更緩慢上升。 將其供給至注射栗3，則上游側的壓㈣會成為 2内液體L的壓力，且下游侧的壓力ρ2、ρ2，會成為使内= 間10内的活塞11後退之液體L的壓力。第6圖中顯示用以使 活塞11克服與注射泵9的摩擦而後退之必要壓力ρρ。如圖所 15不，上游侧的壓力上升至ΡΡ後、下游侧壓力上升至ρρ為止， 相較於氣泡Β未混入時的延遲以，氣泡Β混入時的延遲丁2會 增加。該延遲ΤΙ、Τ2，會因為液體L的黏度、流路5、7及 切換閥6的流路阻抗以及注射器9内徑等，有很大的差異。 第7圖係顯示本實施型態中，在注射泵3内部空間1〇吸 2〇入液體L(自供給槽2加壓導入)之際，可藉控制裝置16控制 之驅動機構4的動作流程。如圖所示，控制裝置16，若感測 器15檢測出活塞11的棒12，即可使馬達π逆轉，並且使推 進器14後退，再藉由液體l的壓力使活塞η後退，將液體£ 導入内部空間1〇。 200831780 然而，控制裝置16，若感測器15無法檢測出活塞11的 棒12，即停止馬達13的旋轉，並使推進器14停止。控制裝 置16，在馬達13停止後，測量感測器15檢測出活塞u的棒 12為止的時間。在感測器15檢測出棒12為止的時間相當於 5第6圖的氣泡未混入時的延遲時間在預定猶豫時間T1(例 如，3秒）以内的情形下，可使馬達13再度逆旋轉且使推進 器14後退’並可藉液體l的壓力使活塞11更加後退。In the figure of Fig. 6, the liquid is mixed with the pressure on the downstream side of the bubbled material. As shown in the figure, the gas and bubbles will shrink due to the increase in pressure, and since the volume of the appearance of the liquid L is reduced, the downstream pressure Ρ2' rises more slowly than when the pressure is not applied to the bubble. rise. When this is supplied to the injection pump 3, the pressure (4) on the upstream side becomes the pressure of the liquid L in the inner side, and the pressures ρ2 and ρ2 on the downstream side become the pressure of the liquid L in which the piston 11 in the inner portion 10 is retracted. The necessary pressure ρρ for retracting the piston 11 against the friction with the syringe pump 9 is shown in Fig. 6. As shown in Fig. 15, the pressure on the upstream side rises to the rear side and the pressure on the downstream side rises to ρρ, and the retardation 2 when the bubble enthalpy is mixed increases as compared with the delay when the bubble enthalpy is not mixed. The delays Τ and Τ2 are greatly different depending on the viscosity of the liquid L, the flow path impedance of the flow paths 5 and 7 and the switching valve 6, and the inner diameter of the syringe 9. Fig. 7 is a view showing the flow of the operation of the drive mechanism 4 which can be controlled by the control unit 16 when the internal space 1 of the syringe pump 3 sucks 2 into the liquid L (pressurized from the supply tank 2) in the present embodiment. . As shown in the figure, if the sensor 15 detects the rod 12 of the piston 11, the motor π can be reversed, and the pusher 14 can be retracted, and the piston η can be retracted by the pressure of the liquid 1. £ Import internal space 1〇. 200831780 However, the control device 16 stops the rotation of the motor 13 if the sensor 15 cannot detect the rod 12 of the piston 11, and stops the pusher 14. The control unit 16 measures the time until the sensor 15 detects the rod 12 of the piston u after the motor 13 is stopped. When the time until the sensor 15 detects the rod 12 corresponds to the delay time when the bubble of FIG. 6 is not mixed, the motor 13 can be reversely rotated again within a predetermined hesitation time T1 (for example, 3 seconds). The propeller 14 is retracted 'and the piston 11 can be retracted by the pressure of the liquid l.
由於在感測器15無法於猶豫時間T1以内再度檢测出棒 12的情形下，會發生因氣泡混入而產生延遲之疑慮，因而 10控制裝置丨6，會當作吸入異常而停止驅動機構4的動作，並 在例如設置於控制裝置16之顯示裝置等顯示異常。 在相較於猶豫時間T1更長的期間，未發生感測器15無 法再度檢測出棒12之吸入異常的情形下，控制裝置16會在 推進器14藉由未圖示之後退界限感測器檢測出後退至進料 15螺桿的端部為止時，停止吸入動作。 如此一來，本實施型態的液體供給裝置1，可供給混入 有氣泡之液體L，並防止在後程序發生不良的危險。 又’本實施型態之液體供給裝置1中，控制裝置16，亦 可進行第8圖所示之控制。該控制中，控制裝置16，若感測 20 器15無法檢測出棒12，即停止馬達13的旋轉並停止推進器 14 ’在感測器15再度檢測出棒12為止的時間在猶豫時間以内 的情形下，則再度逆旋轉馬達13的點與第7圖的控制相同。 然而，該控制中，即使在感測器15無法在猶豫時間τΐ 以内再度檢測出棒12的情形下，亦可進一步監視感測器15 11 200831780 的輸出’在第6圖混入有氣泡情形下，相當於壓力上升的延 遲時間在判別時間T2(例如，10秒)以内、感測器七可再度 檢測出棒12時，即停止該處理並顯示有氣泡混入之警告。 感測器15無法再度檢測出棒12而直接經過判別時間τ2時， 5即直接停止該處理並進行吸入異常的警告表示。 藉此，操作者可了解動作停止的原因是因為氣泡混入 的可能性高或者是這些以外的機構問題等的可能性高，且In the case where the sensor 15 cannot detect the rod 12 again within the hesitation time T1, there is a fear that the bubble is mixed, and thus the control device 丨6 stops the driving mechanism 4 as a suction abnormality. The operation is displayed abnormally, for example, on a display device provided on the control device 16. In the case where the sensor 15 cannot detect the suction abnormality of the rod 12 again during the period longer than the hesitation time T1, the control device 16 will retreat the limit sensor in the pusher 14 by not shown. When the end of the screw of the feed 15 is detected to be retracted, the suction operation is stopped. As a result, the liquid supply device 1 of the present embodiment can supply the liquid L in which the air bubbles are mixed, and the risk of occurrence of defects in the subsequent program can be prevented. Further, in the liquid supply device 1 of the present embodiment, the control device 16 can also perform the control shown in Fig. 8. In this control, the control device 16 stops the rotation of the motor 13 and stops the rotation of the motor 13 and stops the time when the sensor 15 detects the rod 12 again within the hesitation time if the sensor 20 fails to detect the rod 12. In this case, the point at which the motor 13 is reversely rotated again is the same as the control of Fig. 7. However, in this control, even if the sensor 15 cannot detect the rod 12 again within the hesitation time τ ,, the output of the sensor 15 11 200831780 can be further monitored 'in the case where the bubble is mixed in the sixth figure, When the delay time corresponding to the pressure rise is within the determination time T2 (for example, 10 seconds) and the sensor 7 can detect the rod 12 again, the process is stopped and a warning of bubble mixing is displayed. When the sensor 15 cannot detect the rod 12 again and directly passes the determination time τ2, 5 immediately stops the processing and displays a warning indicating that the suction is abnormal. Thereby, the operator can understand that the reason for the stop of the motion is because the possibility of air bubbles being mixed or the possibility of a mechanism other than these is high, and
可有效率地進行問題處置。 又，本實施型態中，將液體L吸入至注射器9時，活塞 10 11會按壓推進器14並後退。因此，液體L會對推進器14的反 作用力作用，且在混入有氣泡Β的情形下，推進器μ的反作 用力會預先壓縮氣泡。即，僅預先壓縮氣泡Β部分，會導致 氣/包Β收縮所產生的活塞1丨後退的延遲時間變短，而造成氣 泡Β的檢測精密度降低。 15 為了解決該問題，在將液體L吸入至注射器9之際，首 先’在切換閥6連通注射器9的内部空間1〇與吐出流路8的狀 悲下’啟動馬達13使推進器14後退，待推進器14從棒12距 離例如1至3mm左右後，再操作切換閥6，使内部空間1〇連 通吸入流路5是有效的。 20 如此一來，在液體L不會混入氣泡B、且活塞11的後退 速度與推進器14的後退速度一致時，活塞11可與推進器14 保持一定距離，同時不受到推進器14的反作用力而後退。 由於活塞11可做成後退時不受到推進器14的反作用 力，因而可輕易地檢測出氣泡B混入時活塞11後退的延遲。 12 200831780 另，為此，感測器15必須事先做成推進器14即使距離棒12 數mm亦可檢測出棒12的形式。 【圖式簡單說明】 【第1圖】係本發明1個實施型態之液體供給裝置概略 5 圖。 【第2圖】係第1圖注射泵之詳細圖。Problem handling can be performed efficiently. Further, in the present embodiment, when the liquid L is sucked into the syringe 9, the piston 10 11 presses the pusher 14 and retreats. Therefore, the liquid L acts on the reaction force of the pusher 14, and in the case where the bubble enthalpy is mixed, the reaction force of the pusher μ pre-compresses the bubble. That is, only the pre-compression of the bubble enthalpy portion causes a delay time in which the piston 1 丨 retreats due to the contraction of the gas/envelope becomes short, and the detection precision of the bubble enthalpy is lowered. In order to solve this problem, when the liquid L is sucked into the syringe 9, first, the motor 13 is started to retract the propeller 14 when the switching valve 6 communicates with the internal space 1 of the syringe 9 and the discharge flow path 8. It is effective to operate the switching valve 6 after the distance between the rods 12 and the rod 12 is, for example, about 1 to 3 mm, so that the internal space 1 is connected to the suction flow path 5. In this way, when the liquid L does not mix into the bubble B and the retreating speed of the piston 11 coincides with the retreating speed of the propeller 14, the piston 11 can maintain a certain distance from the propeller 14 while being unaffected by the reaction force of the propeller 14. And back. Since the piston 11 can be made to retreat without being subjected to the reaction force of the pusher 14, the delay of the piston 11 retreating when the bubble B is mixed can be easily detected. 12 200831780 In addition, for this purpose, the sensor 15 must be previously formed into the pusher 14 to detect the form of the rod 12 even if it is a few mm from the rod. BRIEF DESCRIPTION OF THE DRAWINGS [Fig. 1] Fig. 1 is a schematic view of a liquid supply device according to one embodiment of the present invention. [Fig. 2] is a detailed view of the syringe pump of Fig. 1.
【第3圖】係顯示第2圖注射泵的活塞移動時之詳細圖。 【第4圖】係顯示第2圖注射泵氣泡混入時之詳細圖。 【第5圖】係顯示黏性流體壓力傳達之模式圖。 10 【第6圖】係顯示第5圖的模式中壓力的變化圖。 【第7圖】係第1圖之液體供給裝置中液體吸入動作的 流程圖。 【第8圖】係第7圖替代之液體吸入動作流程圖。 【主要元件符號說明】 1…液體供給裝置 10...内部空間 2…供給槽 11…活塞 3...注射泵 12…棒 4…驅動機構 13...馬達 5…吸入流路 14...推進器 6···切換閥 15...感測器 7...共用流路 16...控制裝置 8···吐出流路 17…進料螺桿 9…注射器 13[Fig. 3] is a detailed view showing the movement of the piston of the syringe pump of Fig. 2. [Fig. 4] shows a detailed view of the bubble injection of the syringe pump in Fig. 2. [Fig. 5] shows a pattern diagram of viscous fluid pressure transmission. 10 [Fig. 6] shows the change in pressure in the mode of Fig. 5. Fig. 7 is a flow chart showing the liquid suction operation in the liquid supply device of Fig. 1. [Fig. 8] is a flow chart of the liquid inhalation action replaced by Fig. 7. [Main component symbol description] 1...liquid supply device 10...internal space 2...supply tank 11...piston 3...injection pump 12...rod 4...drive mechanism 13...motor 5...intake flow path 14... Propeller 6···Switching valve 15...sensor 7...shared flow path 16...control device 8···discharge flow path 17...feed screw 9...injector 13