.201200817 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種冷卻系統，尤沪 ^ 尤才日一種利用控制壓蕾· 式液滴微致動器，使其產生體積均勻 電 ^ 』之斂液滴並散佈於办 間中，達到吸熱降溫之冷卻系統。 、二 【先前技術】.201200817 VI. Description of the Invention: [Technical Field] The present invention relates to a cooling system, and a special control embossing type droplet microactuator is used to generate a uniform volume of electricity. The droplets are scattered and dispersed in the office to achieve a cooling system that absorbs heat and cools down. Second, [prior art]
堵多專家預估未來5"内全球平均溫度將持續升古 攝氏，而此暖化現U間接造成了人們生活機能: 失調，農、畜、牧業生產減少。此際，我國自2〇〇2年起， 每年小型之空調設備’包含窗型與分離型冷氣機設備，1 f值規模已達到新台幣100億以上，年生產量超過1〇〇萬 台，在台灣夏日炎熱的高溫操作下極為耗費能源。 採用傳統壓縮機之冷卻技術雖亦日漸進步中，例如引 進變頻技術，卻仍甚為耗能，更難以適用於戶外庭院等開 放式空間。另一方面，目前少數應用於如溫室一類等農藝 場所之冷卻系統，主要採用傳統幫浦加壓馬達搭配單孔錐 狀喷嘴之喷霧冷卻技術，可連續地擊出水柱而產生霧化水 滴來達到局部空間降溫效果。但傳統幫浦加壓馬達容易產 生咼％音、高耗電等問題，且噴霧液滴尺寸無法準確控制， 不均勻大小的液滴嚴重限制了其環境狀態調節效益，包括 當液滴過小時會降溫不足，而液滴過大時會導致過度潮濕， 因此’以傳統幫浦加壓馬達結合錐狀噴嘴之噴霧冷卻技 術’仍是難以在開放空間中產生令人舒適的空調冷卻作 用。 i S1 3 201200817 然而，_冷卻技術具有高度節約能源之技㈣色與 產品優勢，無疑地使其依然存在著極大市帛冑纟。在國際 上，空調設備的高耗能問題業已廣泛弓丨起各國注目焦點。 例如，在2002年，與台灣氣候條件相似的美國加州㈣ 先提出先進蒸發冷卻技術之白皮書（advanced evapcuative cooling white paper);其研究報告結論顯示，採用蒸發冷 卻系統（indirect-direct evaporative cooler, |DEC)將可替 加研節約尖峰時期90〇/〇之能源消耗。目前，此喷霧技術冷 • 卻技術區分為低、中、高壓系列，可廣泛的運用於農業作 物、畜牧業、園藝設施 '戶外休閒及各類型營業場所造景 之高溫冷卻應用；對於降溫、調節溼度及淨化空氣皆可達 到立竿見影的效果。 在傳統的喷霧冷卻相關技術方面，其主要元件包括有 高壓噴霧系統、噴霧嘴、往復式幫浦馬達、水冷風扇冷卻 等。明顯地，此些應用幫浦加壓馬達方式，皆採用且有馬 達、噴嘴、風扇等必要零件’以期進—步改善單獨或組合 ® 差異化之部份冷卻功效變化’卻仍無法達成最佳霧化效果 及馬達靜音狀態。其技術特性隨著時間演化，由最早期的 基本噴霧冷卻之大型機械系統，逐步發展至電子化控制與 更小型化可攜式裝置，並朝向符合未來節能型喷霧冷卻系 統之技術發展趨勢。 在商品化的市場需求方面，噴霧冷卻系統所深切關注 的疋0Μ"霧品質效率興糸統建置成本的尚低等，其中影像續· 霧品質效率的主因應以液滴產生大小、速度與均勻性及最 終蒸發熱傳通量影響最大；倘若噴印液滴之直徑不均勻或 .201200817 速度不一致’其終將導致最後的噴霧效率不良，顯然有待 改善。 【發明内容】 有鑑於目前喷霧冷卻技術係採用傳統幫浦加壓馬達與 錐狀喷嘴，具有喷霧液滴尺寸無法準確控制、高臂音、高 耗電等缺點，導致噴霧效率低落.，本發明之主要目的係提 供一種微液滴空間冷卻系統，利用壓電式元件配合數位控 • 制達到準確控制噴灑液滴尺寸，同時兼具低耗能、低噪音 優點。 為達成前述目的’本發明微液滴空間冷卻系統包含 有： 複數個壓電式液滴微致動器，係利用流體管道彼此連 接； 一供液單元，係與前述流體管道相連接，將液體經由 該流體管道輸往各個壓電式液滴微致動器； ® —供電單元，係經由導線電性連接至各個壓電式液滴 u致動益，该供電單元送出—驅動電壓以驅動該壓電式液 滴微致動器而喷灑出冷卻液滴； 一中央控制單元，係電性連接該供液單元及該供電單 元用以控制該供液單元之輪出流量，以及控制該供電單 元何時輸出該驅動带壓。 基於别述架構，本發明之中央控制單元可控制該供電 單元於適虽蚪機產生驅動電壓’令壓電式液滴微致動器在 接收該驅動電壓時將電能轉換為液體動能，喷麗出具有均 i S] 5 201200817 粒徑的液滴，使其擴散分佈於週遭環境中，利用喷液微滴 會吸收週遭環境空氣之高溫熱量而蒸發，由液相轉變成氣 相來達到降溫冷卻效果’在控制過程中，並無使用幫浦加 壓馬達故可避免高噪音、高耗電等問題》 【實施方式】 請參考圖1所示，本發明陣列化微液滴空間冷卻系統 包含有： 複數個壓電式液滴微致動器，0，係利用流體管道2〇 彼此連接，該壓電式液滴微致動器10之數量及排列方式 可根據貫際冷卻場合之環境而適當規劃 列，當其分布密度越高時1能達到均質化空間溫度的車: 果； 一供液單元30,係與前述流體管道2〇相連接，將液 體（例如水）經由該流體管道2〇輸往各個壓電式液滴微 器10 ; -供電單元40,係經由導線5〇電性連接至各個壓電 式^滴微致動！！ 10,該供電單元4()可送出1動電壓以 駆忒壓電式液滴微致動器1〇而噴灑出冷卻液滴； 一中央控制單元6〇，#雷w、击吐… _ 係電性連接該供液單元30及該 供電早兀40，用以控制 庙私山 X併液早兀3〇之流量及供電單元 應輸出驅動電壓之時機， 進-步連接m,。。 该中央控制單元60可 圍枣产皿又70 ’該溫度感測器70係感應周 圍％%之即時溫度 以麥1『$ m杜 、感應、，.Q果提供予中央控制單元60 以判斷疋否應執行冷卻作業。 201200817Many experts predict that the global average temperature in the future will continue to rise to Celsius, and this warming U indirectly causes people's living functions: Disorders, reduced production of agriculture, livestock, and animal husbandry. At this time, since 2002, China's small air-conditioning equipment has included window type and separate air-conditioner equipment. The scale of 1 f has reached NT$10 billion, and the annual production capacity has exceeded 100,000 units. Taiwan's hot summer heat is extremely energy intensive. Although the cooling technology using the conventional compressor is also gradually improving, for example, the introduction of the frequency conversion technology, it is still very energy-intensive, and it is more difficult to apply to an open space such as an outdoor courtyard. On the other hand, a few cooling systems used in agronomic establishments such as greenhouses mainly use a traditional pump pressurization motor with a single-hole cone nozzle spray cooling technology, which can continuously hit the water column to produce atomized water droplets. Achieve local space cooling effect. However, the conventional pump pressurizing motor is prone to problems such as 咼% sound, high power consumption, and the droplet size cannot be accurately controlled. The uneven size of the droplet severely limits the environmental conditioning effect, including when the droplet is too small. Insufficient cooling, and excessive droplets can cause excessive humidity, so the 'spray cooling technology with a conventional pump pressurizing motor combined with a cone nozzle' is still difficult to produce comfortable air conditioning cooling in an open space. i S1 3 201200817 However, _cooling technology has a high energy-saving technology (4) color and product advantages, which undoubtedly makes it still a great market. In the international arena, the high energy consumption of air-conditioning equipment has been widely seen in various countries. For example, in 2002, California (4), which is similar to Taiwan's climatic conditions, first proposed an advanced evapcuative cooling white paper; its research report concluded that an indirect-direct evaporative cooler (DEC) was used. The energy consumption of 90〇/〇 will be saved during the peak period. At present, this spray technology is cold and technically divided into low, medium and high pressure series, which can be widely used in agricultural crops, animal husbandry, horticultural facilities, 'outdoor leisure and high temperature cooling applications for various types of business sites; for cooling, Adjusting the humidity and purifying the air can achieve immediate results. In the traditional spray cooling related technology, its main components include high pressure spray system, spray nozzle, reciprocating pump motor, water cooled fan cooling and so on. Obviously, these applications are applied to the pressurized motor, and all the necessary parts such as motors, nozzles, fans, etc. are used to improve the cooling efficiency of the individual or the combination of the different parts. Atomization effect and motor mute status. Its technical characteristics evolved over time, from the earliest large-scale mechanical systems for basic spray cooling to electronic control and smaller portable devices, and are geared toward technological advances in future energy-efficient spray cooling systems. In terms of commercial market demand, the spray cooling system is deeply concerned about the low cost of fog quality and efficiency. The main cause of image quality and fog efficiency is the size and speed of droplets. Uniformity and ultimate evaporative heat transfer have the greatest impact; if the diameter of the printed droplets is not uniform or the speed of .201200817 is inconsistent, it will eventually lead to poor final spray efficiency, which is obviously to be improved. SUMMARY OF THE INVENTION In view of the current spray cooling technology, the conventional pump pressurizing motor and the tapered nozzle have the disadvantages that the spray droplet size cannot be accurately controlled, high arm sound, high power consumption, etc., resulting in low spray efficiency. The main object of the present invention is to provide a micro-droplet space cooling system, which utilizes a piezoelectric element in combination with a digital position control system to accurately control the size of a spray droplet, and at the same time has the advantages of low energy consumption and low noise. In order to achieve the foregoing objectives, the micro-droplet space cooling system of the present invention comprises: a plurality of piezoelectric droplet micro-actuators connected to each other by a fluid conduit; a liquid supply unit connected to the fluid conduit to liquid Through the fluid pipeline to each piezoelectric droplet microactuator; the power supply unit is electrically connected to each piezoelectric droplet u via a wire, and the power supply unit sends a driving voltage to drive the a piezoelectric droplet microactuator for spraying cooling droplets; a central control unit electrically connecting the liquid supply unit and the power supply unit for controlling the flow of the liquid supply unit and controlling the power supply When the unit outputs the drive belt pressure. Based on the architecture, the central control unit of the present invention can control the power supply unit to generate a driving voltage when the piezoelectric droplet micro-actuator converts the electrical energy into liquid kinetic energy when receiving the driving voltage. The droplets having the particle size of the average S S 5 201200817 are dispersed and distributed in the surrounding environment, and the droplets of the liquid are absorbed by the high temperature heat of the surrounding ambient air to evaporate, and the liquid phase is converted into a gas phase to achieve cooling and cooling. Effect 'In the control process, there is no use of the pump pressurizing motor, so high noise, high power consumption and the like can be avoided." [Embodiment] Referring to FIG. 1, the arrayed micro-droplet space cooling system of the present invention includes : a plurality of piezoelectric droplet microactuators, 0, are connected to each other by a fluid conduit 2, and the number and arrangement of the piezoelectric droplet microactuators 10 can be appropriately adapted according to the environment of the continuous cooling occasion The plan column, when the distribution density is higher, the vehicle that can reach the homogenized space temperature: a liquid supply unit 30 is connected to the fluid pipe 2〇, and the liquid (for example, water) is passed through the fluid pipe 2 Exports respective piezoelectric micro-droplet 10; - a power supply unit 40, is connected via a line to the respective leads are electrically 5〇 piezoelectric microactuator dropwise ^! ! 10, the power supply unit 4 () can send a dynamic voltage to 駆忒 piezoelectric droplet micro-actuator 1 〇 sprayed cooling droplets; a central control unit 6 〇, #雷 w, 吐吐... _ The liquid supply unit 30 and the power supply early 40 are electrically connected to control the flow rate of the Miaoshan X and the liquid power supply and the timing at which the power supply unit should output the driving voltage, and the m is connected. . The central control unit 60 can be used to determine the 即时 产 产 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 Should the cooling operation be performed. 201200817
如圖2所示’本發明中所使用之壓電式液滴微致動器 1 〇為一種將電能轉換成動能的微型能量轉換單元，該壓電 式液滴微致動器1 〇内部係形成一可貯存液體的腔體11， 腔體11係與流體管道20相連通且上方設有一壓電薄獏 12’另於腔體11下方形成有複數個噴孔13，該複數個噴 孔13可具有相同孔徑；其中，該壓電薄膜12接收供電單 元40所輸出之驅動電壓v而產生振動，進而將腔體I)内 部的液體向外擠壓而在噴孔13的出口處產生體積約略岣 勻的微滴。整體而言’壓電式液滴微致動器】◦是將輪入 之電能功率，經由壓電薄膜彳2振動轉換成液體流率，而 其噴液通量可根據中央控制單元60之操作而達到精確數 位化控制，產生符合設定的喷液流量值。 备壓電式液滴微致動器彳〇所產生的微滴擴散分佈至 空間時，在歷經一段時間之後，將因自然吸收週遭環境空 氣之高溫熱量而蒸發’致使由液相轉變成氣相，可降低其 環i兄空氣之溫度，產生冷卻效益。 明 > 考圖3所示，.本發明陣列化微液滴空間冷卻系 於實際應用時’可將多數個壓電式液滴微致動g 10均勻 佈在一待冷卻之三維空間1〇〇裡，該三維空間1〇〇可為 開放式㈣’例如運用於農業作物、畜牧業、園藝設施 戶外休閒及各類型營業場所造景之高溫冷卻應用，根據 设的時段或是該三維空@⑽内部的溫度啟動本發明， 由微滴蒸發吸熱與自然對流熱傳過程，使該三維空間K 的溫度能獲得冷卻。 請參考圖4(a)、⑻，本發明在控制方面，可以在中央 201200817 控制單兀60内設定一欲達成之冷卻溫度（Ts)與時間 並將喷液流率（F)設定於—參考平均數值（Fs)，並根據該參 考平均數值（Fs)為基準點以特定循環週期（r )增減其液體 喷液流率（F) ’以容許液滴蒸發氣化時間，得適度地調節溫 度變化範圍；除前述連續性增減的控制方式之外，亦可採 用固定的噴液流率（F)搭配間歇式的啟動控制方式，例如以 參考平均數值（Fs)為固定噴液流率，控制該供液單元3〇根 據-導通時m閉時間交替的啟動、μ閉，亦可達到 _ 調節溫度之目的。 如此，當中央控制單元60將該溫度感測器所測得 之即時溫度與所設定之冷卻溫度(Ts)相比後，若即時溫声 係高於該冷卻溫度（Ts)，係送出控制信號至該供液單元^ 及供電單元40以啟動壓電式液滴微致動器1〇開始進行噴 液冷卻作業，對於任一空間位置（s〇)與時間⑴時，達成由 初始溫度（tq)至冷卻溫度（Ts)之降溫作用（丁。_了3>〇)。 表 r'上所述，本發明利用數位化的控制方式可同步控制 籲多個塵電式液滴微致動器1〇，以電能轉為動能的手段產生 均句，滴粒徑而能兼具低噪音作業，噴液微滴因自：吸收 週也％境空氣之高溫熱量而蒸發’致使由液相轉變成氣 4可降低其化境空氣之溫度，產生冷部效果。當同^ 二多個壓電式液滴微致動器10並以陣列方式均“佈： 一待冷卻空間時’可更均質化空間溫度。 【圖式簡單說明】 圖本發明陣列化微液滴空間冷卻系統之配置示音、 201200817 圖2 :本發明壓電式液滴微致動器之示意圖。 圖3 :本發明分布在一待冷卻三維空間之示意圖。 圖4(a):空間溫度（T)之時變圖。 圖4(b):喷液流量（F)之時變圖。 【主要元件符號說明】 1 0壓電式液滴微致動器 1 1腔體 1 2壓電薄膜 13喷孔 20流體管道 30供液單元 40供電單元 50導線 6 0中央控制單元 70溫度感測器 100三維空間As shown in FIG. 2, the piezoelectric droplet microactuator 1 used in the present invention is a micro energy conversion unit that converts electrical energy into kinetic energy, and the piezoelectric droplet microactuator 1 A cavity 11 for storing a liquid is formed. The cavity 11 is connected to the fluid conduit 20 and is provided with a piezoelectric thin crucible 12'. Further, a plurality of nozzle holes 13 are formed under the cavity 11, and the plurality of nozzle holes 13 are formed. The piezoelectric film 12 can receive the driving voltage v output from the power supply unit 40 to generate vibration, thereby pressing the liquid inside the cavity I) outwardly to generate a volume at the exit of the injection hole 13. Evenly dripping droplets. In general, the 'piezoelectric droplet microactuator' ◦ is to convert the electric power of the wheel into vibration flow through the piezoelectric film 彳 2 into a liquid flow rate, and the discharge flux thereof can be operated according to the central control unit 60. The precise digital control is achieved to produce a value corresponding to the set spray flow rate. When the droplets generated by the piezoelectric droplet micro-actuator are diffused into space, after a period of time, they will evaporate due to the natural absorption of the high-temperature heat of the surrounding ambient air, causing the liquid phase to change into a gas phase. It can reduce the temperature of the air in the ring and generate cooling benefits. As shown in Fig. 3, the arrayed microdroplet space cooling of the present invention can be used to uniformly distribute a plurality of piezoelectric droplets micro-actuated g 10 in a three-dimensional space to be cooled. In Bali, the three-dimensional space can be open (four) 'for high-temperature cooling applications such as agricultural crops, animal husbandry, outdoor activities for horticultural facilities and landscaping of various types of business sites, depending on the time period or the three-dimensional space @ (10) The internal temperature is activated by the present invention, and the temperature of the three-dimensional space K can be cooled by the droplet evaporation endothermic and natural convection heat transfer process. Referring to FIG. 4(a) and (8), in the control aspect, the cooling temperature (Ts) and time to be achieved can be set in the central unit 201200817 control unit 60, and the liquid flow rate (F) is set to - reference. The average value (Fs), and according to the reference average value (Fs) as a reference point to increase or decrease its liquid spray flow rate (F) ' in a specific cycle period (r) to allow the droplet evaporation vaporization time, moderately adjusted Temperature variation range; in addition to the above-mentioned continuous increase and decrease control mode, a fixed spray flow rate (F) can be used with intermittent start control mode, for example, the reference average value (Fs) is the fixed spray flow rate. The liquid supply unit 3 is controlled to be alternately activated and closed according to the closing time of the m, and the temperature can be adjusted to achieve the purpose of adjusting the temperature. Thus, when the central control unit 60 compares the instantaneous temperature measured by the temperature sensor with the set cooling temperature (Ts), if the instant temperature system is higher than the cooling temperature (Ts), the control signal is sent. The liquid supply unit and the power supply unit 40 start the liquid discharge cooling operation by starting the piezoelectric liquid droplet microactuator 1 , and the initial temperature (tq) is reached for any spatial position (s〇) and time (1). ) to the cooling temperature (Ts) of the cooling effect (D. _ 3 > 〇). As described in the table r', the present invention utilizes the digital control method to synchronously control a plurality of dust-electric droplet microactuators 1 〇, and generates a uniform sentence by means of electric energy conversion into kinetic energy. With low noise operation, the spray droplets evaporate due to the absorption of the high temperature heat of the ambient air, which causes the conversion from the liquid phase to the gas 4 to lower the temperature of the vaporized air and produce a cold effect. When the same two or more piezoelectric droplet microactuators 10 are arranged in an array, the space temperature can be more homogenized. [Simplified Schematic] The array micro-liquid of the present invention is illustrated. Configuration of the drop space cooling system, 201200817 Figure 2: Schematic diagram of the piezoelectric droplet microactuator of the present invention. Figure 3: Schematic diagram of the present invention distributed in a three-dimensional space to be cooled. Figure 4 (a): space temperature Time-varying diagram of (T) Figure 4(b): Time-varying diagram of spray flow rate (F) [Description of main component symbols] 1 0 Piezoelectric droplet microactuator 1 1 cavity 1 2 Piezoelectric Film 13 injection hole 20 fluid pipe 30 liquid supply unit 40 power supply unit 50 wire 6 0 central control unit 70 temperature sensor 100 three-dimensional space