200907552 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種冷卻光源模組放電部之方法，特 別係有關於一種利用風扇冷卻光源模組放電部之方法。 【先前技術】 傳統的投影裝置或者光學系統中經常利用超高壓汞燈 作為其光源，雖然超高壓汞燈具有高亮度以及高發光效率 等優點，但是由於汞燈在熄滅後的數分鐘内仍會維持著較 高的溫度以及汞蒸氣壓，故無法立即再次氣體放電，必須 等到燈管内部的汞蒸氣冷卻後才能再次啟動。 請參閱第1A圖，該圖係表示一超高壓汞燈放電部10 之示意圖。爲了縮短汞燈重新啟動的等待時間，常見的解 決方式係在汞燈熄滅後透過定轉速風扇持續地對汞燈實施 冷卻，以加速放電部10内的汞蒸氣凝結。傳統的冷卻方法 雖可使放電部10迅速降溫，卻無法控制汞蒸氣凝結位置； 在重新啟動汞燈時，容易導致放電部10兩侧電極11、12 之間所產生的電弧L損壞玻璃管壁而影響其使用壽命(如 第1A圖所示）。有鑑於此，改善傳統的冷卻方法以促進放 電部10内的汞蒸氣在冷卻過程中儘可能凝結於電極Π底 部位置（如第1B圖所示），使得電弧L形成於電極11、12 尖端處（阻抗最小之路徑）以避免損壞玻璃管壁始成為一重 要之課題。 0535-A22231TWF(N2)；A07124；TKLIN 5 200907552 【發明内容】 本發明之一實施例提供一種冷卻光源模組放電部之方 法，首先一風扇係以一第一轉速冷卻前述放電部至一第一 溫度，其中前述第一溫度係與放電部内之一蒸氣之凝結溫 度相關；接著，當放電部降溫至第一溫度時，前述風扇以 一第二轉速冷卻放電部至一第二溫度，其中放電部内之蒸 氣係於第二溫度凝結達一特定比例，且前述第二轉速小於 第一轉速。 c 本發明之一實施例更提供一種投影機，包含有一光源 模組以及一風扇，上述光源模組包括一反射罩、一放電部 以及一導流裝置，其中反射罩具有一開口，放電部係填充 一蒸氣並設置於反射罩中。前述放電部包含一第一電極以 及一第二電極，其中第一電極鄰近反射罩之開口，第二電 極則與第一電極相對。前述導流裝置連接反射罩並覆蓋前 述開口，包含一進氣口及一排氣口。前述風扇設置於進氣 口，其中風扇先以第一轉速冷卻放電部至一第一溫度，再 1_ 以一第二轉速冷卻放電部至一第二溫度；特別地是，前述 第二轉速小於第一轉速，第一溫度大致等於蒸氣之一凝結 溫度，且前述蒸氣於第二溫度時凝結達一特定比例。 本發明之一實施例更提供一種投影機，包含有一光源 模組以及一風扇，上述光源模組包括一反射罩、一放電部 以及一導流裝置，其中反射罩具有一開口，放電部係填充 一蒸氣並設置於反射罩中。前述放電部包含一第一電極以 及一第二電極，其中第一電極往反射罩之開口延伸，第二 0535-A22231TWF(N2)；A07124；TKLIN 6 200907552 電極則與第一電極相對。前述導流裝置連接反射罩並覆蓋 前述開口，包含一進氣口及一排氣口。特別地是，前述放 電部於該風扇為一第一轉速時冷卻一第一期間，再於風扇 為一第二轉速時冷卻一第二期間，接著再於風扇為一第三 轉速時冷卻一第三期間，其中前述第二轉速小於第一轉速。 【實施方式】 請參閱第2A圖，該圖係表示一投影機内部光源模組 C 1〇〇以及風扇200之示意圖。前述光源模組100例如為一 超高壓汞燈，主要包括一放電部110、一基座120、一反射 罩130、一導流裝置140以及一鏡片150，其中放電部110 位於反射罩130之一中心軸C並且固定於基座120上，前 述導流裝置140則連接反射罩130與鏡片150，並且覆蓋 於反射罩130之一開口 131。 如第2A圖所示，前述放電部110内部包含有金屬材質 之第一電極111和第二電極112，分別作為放電部110之 I 陰、陽極，其中第一電極111係沿中心軸C方向往前述開 口 131延伸，且第二電極112係與第一電極111相對。需 特別說明的是，在放電部110内填充有一氣體，當第一、 第二電極111、112電壓大於一特定值時會自第一電極111 產生電弧、激化氣體（於本實施例中以采蒸氣為例）放電而 形成光束。 於本實施例中之反射罩130主要係用以反射放電部 110所發出之光線，並可導引光線經過開口 131而穿出鏡 0535-A22231 TWF(N2) ；A07124；TKLIN 7 200907552 片150，其中前、狀 前述放電部130V反射罩130例如為一橢球型反射罩，且 前述風扇置於橢球型反射罩13Q之—焦點上。 流裝置U0之〜、例如為—軸流風扇（axialfan)，設置於導 注入氣流至反射^氣/ U1處，風扇200由前述進氣口 141 口 142排出氣济内，並可透過導流裝置140之排氣 部110進行散熱如杂第圖中箭頭方向所示），藉以對放電 電部no内的亨>•田光源柄組1〇0結束使用時，爲了使玫 近開口⑶^^冷卻過程中凝結於第一電極⑴之鄰 扇控制技術Μ ^、1B ®所*)，本發㈣採取多段式風 述於後。 上述目的，有關其詳細的實施方式則詳 接著請一併灸 # 模組100使用狀能=弟2B、3目，前述放電部110在光源 當結束❹A致維持於—操作溫度（約而 u喂辑缸100時風扇ιν壤 ^ 電部110實施散 Ή 200以一弟一轉速S1對放 -第-期間η内迅=圖所示)，藉以使放電部no於 一第一溫度（㈣操作溫細9G(rC)下降至 部no内蒸氣之—靡大致等於放電 疋、、、口 /皿度，亦即，當放雷〗 達約魏時，其内部蒸氣會開 ;溫= 溫度(約，時，前上^ 即由弟一轉速S1切換5 一笙_絲、土 曰1現 谀至1 一轉速幻，直到敌雷 由第-溫度(約400。。)下降至一第二溫度(約々 在此期間内（第二期間Τ2)，放電部m内的）社= 持續增加並達到一特定比例。 旋、、、口里係200907552 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD The present invention relates to a method of cooling a discharge portion of a light source module, and more particularly to a method for cooling a discharge portion of a light source module by using a fan. [Prior Art] Ultra-high pressure mercury lamps are often used as light sources in conventional projection devices or optical systems. Although ultra-high pressure mercury lamps have the advantages of high brightness and high luminous efficiency, they are still in the minute after the mercury lamps are extinguished. Maintaining a high temperature and mercury vapor pressure, it is impossible to immediately discharge the gas again, and it is necessary to wait until the mercury vapor inside the tube is cooled before starting again. Please refer to FIG. 1A, which is a schematic view showing an ultrahigh pressure mercury lamp discharge portion 10. In order to shorten the waiting time for the restart of the mercury lamp, a common solution is to continuously cool the mercury lamp through the fixed speed fan after the mercury lamp is extinguished to accelerate the condensation of mercury vapor in the discharge portion 10. Although the conventional cooling method can rapidly cool the discharge portion 10, it is impossible to control the condensation position of the mercury vapor; when the mercury lamp is restarted, the arc L generated between the electrodes 11 and 12 on both sides of the discharge portion 10 is liable to damage the glass tube wall. It affects its service life (as shown in Figure 1A). In view of this, the conventional cooling method is improved to promote the condensation of the mercury vapor in the discharge portion 10 as much as possible at the bottom of the electrode crucible during cooling (as shown in FIG. 1B), so that the arc L is formed at the tips of the electrodes 11, 12. (The path with the least impedance) to avoid damage to the glass tube wall has become an important issue. 0535-A22231TWF(N2); A07124; TKLIN 5 200907552 SUMMARY OF THE INVENTION An embodiment of the present invention provides a method for cooling a discharge portion of a light source module. First, a fan cools the discharge portion to a first at a first rotational speed. a temperature, wherein the first temperature is related to a condensation temperature of one of the vapors in the discharge portion; then, when the discharge portion is cooled to the first temperature, the fan cools the discharge portion to a second temperature at a second rotation speed, wherein the discharge portion The vapor is condensed to a specific ratio at a second temperature, and the second rotational speed is less than the first rotational speed. An embodiment of the present invention further provides a projector including a light source module and a fan, the light source module including a reflector, a discharge portion, and a flow guiding device, wherein the reflector has an opening, and the discharge portion is A vapor is filled and placed in the reflector. The discharge portion includes a first electrode and a second electrode, wherein the first electrode is adjacent to the opening of the reflector, and the second electrode is opposite to the first electrode. The flow guiding device is connected to the reflector and covers the opening, and includes an air inlet and an air outlet. The fan is disposed at the air inlet, wherein the fan first cools the discharge portion to a first temperature at a first rotational speed, and further cools the discharge portion to a second temperature at a second rotational speed; in particular, the second rotational speed is less than the first At a rotational speed, the first temperature is substantially equal to one of the vapor condensation temperatures, and the vapor is condensed to a specific ratio at the second temperature. An embodiment of the present invention further provides a projector including a light source module and a fan, the light source module including a reflector, a discharge portion, and a flow guiding device, wherein the reflector has an opening, and the discharge portion is filled A vapor is placed in the reflector. The discharge portion includes a first electrode and a second electrode, wherein the first electrode extends toward the opening of the reflector, and the second 0535-A22231TWF(N2); A07124; TKLIN 6 200907552 electrode is opposite to the first electrode. The flow guiding device is connected to the reflector and covers the opening, and includes an air inlet and an air outlet. In particular, the discharge portion is cooled for a first period when the fan is at a first rotational speed, and cooled for a second period when the fan is at a second rotational speed, and then cooled when the fan is at a third rotational speed. The third period, wherein the foregoing second rotation speed is less than the first rotation speed. [Embodiment] Please refer to FIG. 2A, which is a schematic diagram showing a projector internal light source module C1〇〇 and a fan 200. The light source module 100 is, for example, an ultra-high pressure mercury lamp, and mainly includes a discharge portion 110, a base 120, a reflector cover 130, a flow guiding device 140, and a lens 150. The discharge portion 110 is located in one of the reflectors 130. The central axis C is fixed to the base 120. The flow guiding device 140 is connected to the reflector 130 and the lens 150 and covers one opening 131 of the reflector 130. As shown in FIG. 2A, the discharge portion 110 includes a first electrode 111 and a second electrode 112 made of a metal material, respectively, as the anode and the anode of the discharge portion 110, wherein the first electrode 111 is oriented along the central axis C. The aforementioned opening 131 extends, and the second electrode 112 is opposed to the first electrode 111. It should be particularly noted that a gas is filled in the discharge portion 110, and when the voltages of the first and second electrodes 111 and 112 are greater than a specific value, an arc, an intensifying gas is generated from the first electrode 111 (in this embodiment, The vapor is discharged as a sample to form a light beam. The reflector 130 in this embodiment is mainly used to reflect the light emitted by the discharge portion 110, and can guide the light through the opening 131 to pass through the mirror 0535-A22231 TWF (N2); A07124; TKLIN 7 200907552 sheet 150, The front cover and the discharge portion 130V of the reflector 130 are, for example, an ellipsoidal reflector, and the fan is placed at a focus of the ellipsoidal reflector 13Q. The flow device U0~, for example, an axial fan, is disposed at the injecting airflow to the reflection gas/U1, and the fan 200 is exhausted from the air inlet 141 through the port 142, and can pass through the flow guiding device. When the exhaust portion 110 of 140 is dissipated as shown in the direction of the arrow in the figure, the end of the discharge unit 10 in the discharge electric unit no is used to close the opening (3) ^^ In the cooling process, the adjacent fan control technology of the first electrode (1) is Μ ^, 1B ® *), and the present invention (4) adopts a multi-stage wind description. For the above-mentioned purposes, the detailed implementation of the detailed embodiment is followed by a moxibustion. The module 100 can use the energy of the module = 2B, 3 mesh, and the discharge portion 110 is maintained at the operating temperature when the light source is finished. When the cylinder 100 is used, the fan is 壤 壤 ^ ^ ^ ^ ^ ^ ^ ^ ^ The fine 9G (rC) drops to the vapor in the no part—the 靡 is roughly equal to the discharge 疋, ,, and the mouth/dish degree, that is, when the lightning is released, the internal vapor will open; the temperature = temperature (about, At the time, the front upper ^ is switched by the younger one speed S1 5 笙 _ silk, the soil 曰 1 is now 1 to a speed illusion, until the enemy mine drops from the first temperature (about 400.) to a second temperature (about 々 During this period (second period Τ 2), the community in the discharge unit m continues to increase and reaches a certain proportion.
0535-A22231TWF(N2)；A07124；TKLlN 8 200907552 在放電部110由第一溫度（約400。〇下降至第二溫度 (約200°C)的過程中，由於蒸氣會持續地冷卻凝結而使得放 電部110内的氣壓下降，因此放電部1 ] 〇内的蒸氣凝結溫 度也會隨之變化而下降（蒸氣凝結溫度與壓力成正比）；於 本實施例中，前述蒸氣凝結溫度區間大致為200〜40(Γ(：， 當放電部110溫度下降至第二溫度（約2〇(TC)時，則表示約 有95%的采蒸氣已完成凝結。0535-A22231TWF(N2); A07124; TKL1N 8 200907552 During the discharge of the first temperature (about 400 〇 to the second temperature (about 200 ° C) in the discharge portion 110, the discharge is caused by the continuous cooling of the vapor. The air pressure in the portion 110 is lowered, so that the vapor condensation temperature in the discharge portion 1 ] is also changed and decreased (the vapor condensation temperature is proportional to the pressure); in the present embodiment, the vapor condensation temperature interval is approximately 200~ 40 (Γ (:, when the temperature of the discharge portion 110 drops to the second temperature (about 2 〇 (TC), it means that about 95% of the steam has been condensed.
如第3圖所示，本實施例係較佳地藉由第二轉速S2為 〇使得放電部110在第二期間T2内的溫度下降幅度趨緩， 以使蒸氣穩定地凝結於第一電極111之鄰近開口 131處。 需特別說明的是，由於第一電極11丨靠近反射罩13〇的開 口 131以及導流裝置140的進、排氣口 I"、，即使在 風扇200第二轉速S2為0的情況下，仍可透過自然的熱對 流而逐漸降溫，並利於蒸氣凝結於第—電極ηι之鄰近開 二131處。然而，尚可視不同冷卻速度需求而適當地調= 刚述第二轉速S2，惟前述第二轉速S2應小於第一轉速 S1 ,以促使放電部110内的蒸氣凝結於上述位置。 當放電部110溫度下降至前述第二溫度（約200。〇時 由於汞蒸氣已大致凝結完畢，此時可使風扇测由第二 間Τ3内㈣一度（約加速 ： 170。〇,以利於放電部 弟一 μ度（ y, ^ ^ . ,, ^ 重新2燃。需特別說明的是 在本貫施例中的弟三轉 疋 笼錶、Φ d -fra 於弟二轉速S2並且小 乐一轉速S1，亦即Sl> 而特別說明的是，前述As shown in FIG. 3, in the present embodiment, the temperature drop of the discharge portion 110 in the second period T2 is preferably slowed by the second rotation speed S2 being 〇, so that the vapor is stably condensed on the first electrode 111. Adjacent to the opening 131. It should be particularly noted that, even if the first electrode 11 is close to the opening 131 of the reflector 13 and the inlet and exhaust ports I" of the flow guiding device 140, even if the second rotation speed S2 of the fan 200 is 0, It can be gradually cooled by natural heat convection, and it is conducive to vapor condensation in the vicinity of the first electrode ηι. However, it is also possible to appropriately adjust the second cooling speed S2 as long as the cooling rate is required. However, the second rotational speed S2 should be smaller than the first rotational speed S1 to cause the vapor in the discharge portion 110 to condense at the above position. When the temperature of the discharge portion 110 drops to the aforementioned second temperature (about 200 〇, since the mercury vapor has substantially condensed, the fan can be measured by the second Τ3 (four) at one time (about acceleration: 170 〇, to facilitate discharge) The younger brother has a degree of μ (y, ^ ^ . , , ^ re-burned. It is necessary to specify the third shift of the cage in the present example, Φ d -fra and the second speed S2 and Xiaoleyi The speed S1, that is, Sl>, and particularly, the foregoing
〇535-A22231TWF(N2)；A07124；TKLIN 9 200907552 三溫度（約170°C)係指光源模組100啟動成功率接近100% 時之溫度；於本實施例中，當放電部110於第三溫度（約170 °C)時，啟動成功率係已超過99%(如第4圖所示）。再請參 閱第5圖，於另一實施例中之第三轉速S3亦可等於第二轉 速S2(例如S3=S2=0)，藉以使放電部110的溫度緩慢且穩 定地下降至第三溫度，並促使蒸氣凝結於第一電極111之 鄰近開口 131處。應了解的是，於另一實施例中，第三轉 速S3亦可小於等於第一轉速S1並大於第二轉速S2 ，且 第二轉速S2係較佳地為0(即S12S3>S2=0)，亦可達到促 使蒸氣凝結於第一電極m之鄰近開口 131處並加速冷卻 光源模組100至再啟動之溫度。 综上所述，本發明提供一種冷卻光源模組放電部之方 法，其中前述光源模組例如可作為一投影機之投射光源。 本發明藉由控制風扇轉速可控制放電部内的蒸氣凝結於電 極之位置，如此可避免啟動時所產生的電弧損壞放電部玻 璃管壁，進而可避免縮短光源模組使用壽命。 雖然本發明以前述之較佳實施例揭露如上，然其並非 用以限定本發明，任何熟悉此技藝者，在不脫離本發明之 精神和範圍内，當可做些許之更動與潤飾，因此本發明之 保護範圍當視後附之申請專利範圍所界定者為準。 0535-A22231TWF(N2)；A07124；TKLIN 10 200907552 【圖式簡單說明】 第1A圖係表示習知超高壓汞燈放電部之示意圖； 第1B圖係表示理想超高壓汞燈放電部之示意圖； 第2A圖表示本發明一投影機内部光源模組以及風扇 之示意圖； 第2B圖表示本發明冷卻光源模組放電部之方法流程 圖； 第3圖表示第2A圖中之光源模組放電部溫度、風扇轉 ( 速以及時間之關係圖； 第4圖表示第2A圖中之光源模組啟動成功率與放電部 溫度之關係圖；以及 第5圖表示本發明另一實施例之示意圖。 【主要元件符號說明】 放電部10、110 第一電極11、111 I 第二電極12、112〇 535-A22231TWF(N2); A07124; TKLIN 9 200907552 The temperature (about 170 ° C) refers to the temperature at which the light source module 100 starts to approach 100%; in this embodiment, when the discharge unit 110 is in the third At the temperature (about 170 °C), the startup success rate has exceeded 99% (as shown in Figure 4). Referring to FIG. 5 again, in another embodiment, the third rotational speed S3 may also be equal to the second rotational speed S2 (eg, S3=S2=0), so that the temperature of the discharge portion 110 is slowly and stably lowered to the third temperature. And causing the vapor to condense at the adjacent opening 131 of the first electrode 111. It should be understood that, in another embodiment, the third rotation speed S3 may also be less than or equal to the first rotation speed S1 and greater than the second rotation speed S2, and the second rotation speed S2 is preferably 0 (ie, S12S3>S2=0). The temperature at which the vapor is condensed at the adjacent opening 131 of the first electrode m and accelerates the cooling of the light source module 100 to the restart may also be achieved. In summary, the present invention provides a method of cooling a discharge portion of a light source module, wherein the light source module can be used as a projection light source of a projector, for example. The invention can control the position of the vapor in the discharge portion to be condensed on the electrode by controlling the fan rotation speed, so that the arc generated during the startup can be prevented from damaging the glass tube wall of the discharge portion, thereby avoiding shortening the service life of the light source module. While the present invention has been described above in terms of the preferred embodiments thereof, it is not intended to limit the present invention, and it is to be understood that those skilled in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims. 0535-A22231TWF(N2);A07124;TKLIN 10 200907552 [Simplified description of the drawings] Fig. 1A is a schematic view showing a discharge portion of a conventional ultrahigh pressure mercury lamp; Fig. 1B is a schematic view showing a discharge portion of an ideal ultrahigh pressure mercury lamp; A schematic diagram of a light source module and a fan of a projector according to the present invention; FIG. 2B is a flow chart showing a method for cooling a discharge portion of the light source module of the present invention; FIG. 3 is a diagram showing a temperature of a discharge portion of the light source module and a fan rotation in FIG. (The relationship between speed and time; Fig. 4 is a diagram showing the relationship between the startup success rate of the light source module and the temperature of the discharge portion in Fig. 2A; and Fig. 5 is a view showing another embodiment of the present invention. Discharge portion 10, 110 first electrode 11, 111 I second electrode 12, 112
電弧L 光源模組100 基座120 反射罩130 開口 131 導流裝置140 進氣口 141 0535-A22231TWF(N2)；A07124；TKUN 11 200907552 排氣口 142 鏡片150 風扇200 中心轴C 電弧L 第一轉速S1 第二轉速S2 第三轉速S3 第一期間T1 第二期間T2 第三期間T3Arc L light source module 100 Base 120 Reflector 130 Opening 131 Flow guiding device 140 Air inlet 141 0535-A22231TWF (N2); A07124; TKUN 11 200907552 Exhaust port 142 Lens 150 Fan 200 Central axis C Arc L First speed S1 second rotation speed S2 third rotation speed S3 first period T1 second period T2 third period T3
0535-A22231TWF(N2)；A07124；TKLIN0535-A22231TWF(N2); A07124;TKLIN