200903563 九、發明說明： 【發明所屬之技術領域】 本發明係一種反光燈，尤其是一種資料或視訊投影機 的反光燈，具有一個至少有部分段落被一個反射器環繞住 的燈，該反射器經由一個反射器頸與燈座連接，其中在燈 及反射器頸之間至少設有一個通風孔。 【先前技術】 原則上本發明的反光燈能夠在許多不同的光學應用領 域作爲光源使用，但主要的應用領域是在投影技術及醫學 技術，例如應用於投影機或內視鏡。 投影系統通常是以高壓放電燈作爲光源，例如在網站 w w W . 0 s r a m · d e中描述的視訊燈及投影燈（P - VIP燈）。這種傳 統式的反光燈具有一個裝在由壓製玻璃製成之反射器內的 燈’而且這個燈有部分段落被該反射器環繞住。反射器經 由一個反射器頸與燈座連接，其中在燈及反射器頸之間設 有一個通風孔。反光燈是經由一個風扇（通風器）產生的冷 氣流被冷卻，此冷氣流沿著垂直於反光燈縱軸之方向而流 向反射器的光輸出面，並經由通風孔離開反射器。爲了將 燈調整到所需的溫度通常需要產生流速約1 m/s的冷氣流。 這種反光燈的缺點是沿著垂直於反光燈縱軸的方向流 向燈的冷氣流無法滿足反光燈對於冷卻效果的要求，因此 會縮短安裝在投影機中之反光燈的使用壽命。 【發明內容】 本發明之目的是提出一種冷卻效果比使用先前技術製 造之反光燈更好的反光燈。 200903563 本發明提出的反光燈（尤其是一種資料或視訊投影機 的反光燈）具有一個至少有部分段落被一個反射器環繞住 的燈’該反射器經由一個反射器頸與燈座連接，其中在燈 及反射器頸之間至少設有一個通風孔，至少沿著燈之部分 段落流動的冷氣流會從燈座側通過通風孔。 附屬申請專利項目之內容爲本發明之各種有利的實施 方式。 在本發明的反光燈中，冷氣流是從燈座側流向反射 器，及/或從燈座側吸出而產生並沿著燈流動。這樣可以產 生很有效的冷卻效果，以及達到很好的大面積的燈冷卻作 用，因此可以確保反光燈能夠達到最大效能及具有足夠長 的使用壽命。只需要很小的風扇就可以就可以產生流速達 3 m / s的氣流，而燈冷卻通常只需1 m / s的流速即已足夠。 因此可以減少冷卻造成的噪音，或是使用功率密度更高的 燈。也可以合倂將空氣吹入及從反射器吸出空氣而產生冷 氣流。 一種特別有利的方式是以至少一個與燈座連接的風扇 (尤其是一種軸流式風扇）產生冷氣流。 根據本發明的一種特別有利的實施方式，反光燈具有 一個將燈的部分段落環繞住的外管殼，其中冷氣流至少會 流入燈及外管殼之間的部分段落。 外管殼相對於燈的形狀及/或位置最好是根據所需要 的冷空氣環流作最佳化的設計。 根據本發明的一種很容易製造的實施方式，外管殼具 有一個基本上呈旋轉對稱的斷面。 200903563 面向反射器那一面的冷氣流當然會比較強，因此燈在 該處會受到較強的冷卻。爲了達到均勻的冷卻效果’因此 最好是將通風孔在燈及外管殼之間的斷面設計成沿著燈縱 軸從燈座的一端到另外一端逐漸變小’這樣冷氣流的流速 就會從從燈座的一端到另外一端逐漸逐漸變大’因而可以 降低自然溫度梯度。例如可以將與燈的輪廓搭配並與燈間 隔一段距離的外管殼沿著燈軸移動一段距離而達到這個效 果。 爲了避免燈的底面被過度冷卻，最好是減少冷氣流在 該區域的流量。在反射器內設置氣流阻力（例如封閉燈柱及 反射器頸之間底部半空間的部分段落）、使外管殻相對於燈 的軸外位置在頂面具有較大的氣流斷面’在底面則具有較 小的氣流斷面、或是將外管殻設計成非旋轉對稱的形狀等 方式均可減少冷氣流在底面區域的流量。 此外也可以將氣流阻力設計成可以繞著燈縱軸轉動的 擺動式的物體，例如以薄鋼板或陶瓷製成的物體’由於重 力的關係，不論燈的安裝位置在何處’這個物體都會向下 對準，因此在底面的氣流斷面就會變小。這樣在熱負荷較 大的燈頂面發生的氣流移動及所產生的散熱作用就會比較 大。 根據另外一種可行的實施方式’安裝在反射器內的燈 並沒有外管殼。在這種實施方式中，可以在燈底面設置一 個將燈及反射器頸之間的通風孔部分封閉住的物體，以防 止燈之底面被過度冷卻。例如可以用一種插塞將通風孔的 半邊封住。 200903563 所使用的燈敢好是一種闻壓放電燈，尤其是一種水銀 高壓放電燈。 【實施方式】 以下以一個實施例對本發明的內容做進一步的說明。 第1圖顯示之本發明的反光燈㈠）具有一個部分段落被 一個由壓製玻璃製成的橢圓狀反射器（4)環繞住的燈（2)。反 射器（4)的內表面（6)(見第2圖）有塗上一層反射塗層，並經 由一個圓柱體狀的反射器頸（8)被放入燈座（1 2)的容納段 U0)中。燈座（12)具有一個橢圓狀的本體（14)，本體（14)的 近燈側具有兩個設置在直徑方向上的V形缺口（ 1 6)。燈（2) 相對於反射器（4)的安裝位置被軸向位移到燈座（1 2)內固定 住’因此在燈（2)及反射器頸（8)之間形成一個通風孔（18)， 一個未在第1圖中繪出的風扇（例如一個連接在燈座（12)上 的軸流式風扇）所產生的冷氣流會通過通風孔（18)進入反光 燈（1)。根據本發明，冷氣流是從燈座側通過通風孔（18)， 並沿著燈（2)流動。這個部分將在後面配合第2圖（沿著第1 圖之C-C線的一個縱斷面圖）做更詳盡的說明。 如第2圖的箭頭所示，冷氣流是從燈座側進入反射器 (4)，並沿著燈（2)流動。冷氣流能夠對燈產生很好的冷卻效 果，因此可以確保反光燈（1)能夠達到最大效能及具有足夠 長的使用壽命。只需要很小的風扇就可以就可以產生流速 達3 m/s的氣流，而燈冷卻通常只需1 m/s的流速即已足 夠。因此可以減少冷卻造成的噪音，或是使用功率密度更 高的燈。 另外一種未在圖式中繪出的實施方式是以從燈座側吸 200903563 出空氣的方式產生冷氣流，或是以合倂吹入空氣及吸出空 氣的方式產生冷氣流。 在圖式的實施例中，燈（2)是一種使用短電弧技術的高 壓放電燈。這種高壓放電燈具有一個石英玻璃製的放電容 器（20)，該放電容器（20)具有一個內腔（22)及兩個設置在直 徑方向上並分別具有一條電流引線（28，30)的密封燈柱 (24，26)。從內腔（22)中伸出兩個未在圖式中繪出的設置在 直徑方向上的電極，這兩個電極分別經由鉬薄膜熔融或直 接與一條電流引線（28，30)連接。在燈運轉時，這兩個電極 之間會產生氣體放電。 在圖式的實施例中，反光燈（1)具有一個將燈（2)的部分 段落環繞住的圓柱體狀外管殼（32)，其中冷氣流會流入燈（2) 及外管殼（3 2)之間的部分段落。外管殼（32)與反射器（4)連 接。外管殼（3 2)是由能夠承受相當之溫度負荷的不旋光之 石英玻璃所構成。外管殼（32)是以兩點熔焊的方式（未在圖 式中繪出）被固定在背對燈座（12)的燈柱（24)上，因此會保 留一個流出斷面。外管殼（32)相對於燈（2)的形狀及其軸向 位置可以根據所需要的冷空氣環流作最佳化的設計。由於 在靠近燈座面向風扇那一面上的冷氣流會比較強，因此在 燈（2)及外管殼（3 2)之間，通風孔（18)的斷面會沿著燈縱軸從 燈中央到距燈座較遠之燈柱（24)逐漸變小，因此冷氣流的 流速就會相應地變大，因而可以降低自然溫度梯度。此外， 外管殻（32)會沿著燈軸朝燈座（12)的方向被軸向位移。這樣 就可以用相當低的溫度梯度達到均勻的冷卻效果。 爲了避免將燈（2)之底面過度冷卻，未在圖式中繪出的 200903563 一種實施方式的做法是減少冷氣流在燈的底面區域的流 量。在反射器（8)內設置氣流阻力（例如封閉燈柱（26)及反射 器頸（8)之間底部半空間的部分段落）、使外管殼（32)相對於 燈（2)之軸外位置在頂面具有較大的氣流斷面，在底面則具 有較小的氣流斷面、或是將外管殼（32)設計成非旋轉對稱 的形狀等方式均可減少冷氣流在底面區域的流量。 本發明的反光燈（1)並不受限於以上提及的有外管殻 (32)的實施方式，而是也可以將沒有外管殼（32)的燈（2)安裝 在反射器（4)中。在這種實施方式中，可以在燈柱（2 6)的底 面設置一個將燈（2)及反射器頸（8)之間的通風孔（18)部分封 閉住的物體，以防止燈的底面被過度冷卻。 本發明揭示一種反光燈（1 )，尤其是一種資料或視訊投 影機的反光燈，具有一個至少有部分段落被一個反射器（4) 環繞住的燈（2)，該反射器（4)經由一個反射器頸（8)與燈座 (12)連接，其中在燈（2)及反射器頸（8)之間至少設有一個通 風孔（18)。根據本發明，至少沿著燈（2)之部分段落流動的 冷氣流會從燈座側通過通風孔（1 8)。 【簡單圖式說明】 第1圖：本發明之反光燈的一個側視圖。 第2圖：沿著第1圖之c - C線的一個縱斷面圖。 【主要元件符號說明】 1 反光燈 2 燈 4 反射器 8 反射器頸 -10- 200903563 10 容納段 12 燈座 14 本體 16 缺口 18 通風孔 20 放電容器 22 內腔 24， 26 燈柱 28， 30 電流引線 32 外管殻 -11200903563 IX. Description of the Invention: [Technical Field] The present invention relates to a reflector lamp, and more particularly to a reflector for a data or video projector having a lamp having at least a portion of a passage surrounded by a reflector, the reflector The lamp holder is connected via a reflector neck, wherein at least one venting opening is provided between the lamp and the reflector neck. [Prior Art] In principle, the reflector of the present invention can be used as a light source in many different optical applications, but the main fields of application are in projection technology and medical technology, for example, in projectors or endoscopes. The projection system is usually a high-pressure discharge lamp as a light source, such as a video light and a projection lamp (P-VIP lamp) described on the website w w W . 0 s r a m · d e . This conventional retroreflective lamp has a lamp mounted in a reflector made of pressed glass and a portion of the lamp is surrounded by the reflector. The reflector is connected to the base via a reflector neck with a venting opening between the lamp and the reflector neck. The reflector is cooled by a cold air stream generated by a fan (ventilator) that flows along the longitudinal axis of the reflector to the light output face of the reflector and exits the reflector via the vent. In order to adjust the lamp to the desired temperature, it is usually necessary to generate a cold gas flow having a flow rate of about 1 m/s. A disadvantage of such a reflector is that the cold airflow to the lamp along a direction perpendicular to the longitudinal axis of the reflector does not meet the cooling requirements of the reflector, thus shortening the useful life of the reflector installed in the projector. SUMMARY OF THE INVENTION It is an object of the present invention to provide a reflector lamp that has a better cooling effect than a reflector lamp made using the prior art. 200903563 The reflector lamp of the present invention (especially a reflector for a data or video projector) has a lamp with at least a portion of the passage surrounded by a reflector. The reflector is connected to the socket via a reflector neck, wherein At least one venting hole is provided between the lamp and the reflector neck, and at least a cold airflow flowing along a section of the lamp passes through the vent hole from the lamp holder side. The contents of the affiliated patent application are various advantageous embodiments of the invention. In the reflector lamp of the present invention, the cold air flow flows from the lamp holder side toward the reflector and/or from the lamp holder side to generate and flow along the lamp. This results in a very effective cooling effect and a very good large-area lamp cooling, thus ensuring maximum performance and longevity of the reflector. A small fan can be used to generate a flow rate of up to 3 m / s, and a lamp cooling of usually only 1 m / s is sufficient. This can reduce the noise caused by cooling or use a lamp with a higher power density. It is also possible to blow air in and out of the reflector to generate a cold air stream. A particularly advantageous way is to generate a cold air flow with at least one fan (especially an axial fan) connected to the socket. According to a particularly advantageous embodiment of the invention, the reflector lamp has an outer envelope enclosing a partial section of the lamp, wherein the cold air stream flows at least into a portion of the section between the lamp and the outer envelope. The shape and/or position of the outer envelope relative to the lamp is preferably optimized for the desired cooling air circulation. According to an embodiment of the invention which is easy to manufacture, the outer envelope has a substantially rotationally symmetrical cross section. 200903563 The cold air flow to the side of the reflector is of course stronger, so the lamp will be cooled more strongly there. In order to achieve a uniform cooling effect, it is therefore preferable to design the cross section of the vent hole between the lamp and the outer tube to gradually decrease from one end of the lamp holder to the other end along the longitudinal axis of the lamp. It will gradually increase from one end of the lamp holder to the other end, thus reducing the natural temperature gradient. For example, this effect can be achieved by displacing the outer envelope of the lamp with the contour of the lamp and a distance from the lamp along the lamp axis. In order to avoid excessive cooling of the underside of the lamp, it is desirable to reduce the flow of cold airflow in that area. Airflow resistance is set in the reflector (for example, closing a portion of the bottom half space between the lamp post and the reflector neck), and the outer casing is provided with a large airflow section on the top surface with respect to the off-axis position of the lamp. The flow of the cold gas flow in the bottom surface region can be reduced by having a smaller air flow cross section or by designing the outer casing to a non-rotationally symmetrical shape. In addition, the airflow resistance can also be designed as an oscillating object that can be rotated about the longitudinal axis of the lamp. For example, an object made of thin steel plate or ceramic, due to gravity, no matter where the lamp is installed, the object will The bottom is aligned, so the airflow cross section on the bottom surface becomes smaller. In this way, the movement of the airflow occurring on the top surface of the lamp with a large heat load and the heat dissipation generated are relatively large. According to another possible embodiment, the lamp mounted in the reflector does not have an outer envelope. In this embodiment, an object that partially encloses the vent between the lamp and the reflector neck may be provided on the underside of the lamp to prevent the bottom surface of the lamp from being excessively cooled. For example, a plug can be used to seal the half of the vent. The lamp used in 200903563 dares to be a kind of smell discharge lamp, especially a mercury high pressure discharge lamp. [Embodiment] Hereinafter, the contents of the present invention will be further described by way of an embodiment. The reflector (1) of the present invention shown in Fig. 1 has a lamp (2) in which a partial section is surrounded by an elliptical reflector (4) made of pressed glass. The inner surface (6) of the reflector (4) (see Figure 2) is coated with a reflective coating and placed in the receiving section of the socket (12) via a cylindrical reflector neck (8). U0). The lamp holder (12) has an elliptical body (14) having a V-shaped notch (16) disposed on the proximal side of the body (14) in the diametrical direction. The mounting position of the lamp (2) relative to the reflector (4) is axially displaced into the socket (12) and thus forms a venting opening between the lamp (2) and the reflector neck (8) (18). The cold air generated by a fan (such as an axial fan connected to the lamp holder (12)) not shown in Fig. 1 enters the reflector lamp (1) through the vent (18). According to the invention, the cold air flow passes from the socket side through the venting opening (18) and along the lamp (2). This section will be described in more detail later in conjunction with Figure 2 (a longitudinal section along line C-C of Figure 1). As indicated by the arrow in Fig. 2, the cold airflow enters the reflector (4) from the lamp holder side and flows along the lamp (2). The cold airflow provides excellent cooling of the lamp, thus ensuring maximum performance and long enough life of the reflector (1). With a small fan, a flow rate of up to 3 m/s can be generated, and a lamp cooling of usually only 1 m/s is sufficient. This can reduce the noise caused by cooling or use a lamp with a higher power density. Another embodiment not shown in the drawings is to generate a cold air flow by sucking air from the lamp holder side 200903563, or to generate a cold air flow by blowing air in and out. In the illustrated embodiment, the lamp (2) is a high pressure discharge lamp using short arc technology. The high-pressure discharge lamp has a discharge vessel (20) made of quartz glass, the discharge vessel (20) having an inner cavity (22) and two diametrical diameters each having a current lead (28, 30). Seal the lamp post (24, 26). Two electrodes, not shown in the drawings, which are not shown in the drawings, are fused from the inner cavity (22), and the two electrodes are respectively fused or directly connected to a current lead (28, 30) via a molybdenum film. A gas discharge occurs between the two electrodes while the lamp is running. In the illustrated embodiment, the reflector (1) has a cylindrical outer casing (32) that encloses a portion of the lamp (2), wherein the cold airflow flows into the lamp (2) and the outer casing ( 3 2) Part of the paragraph between. The outer casing (32) is connected to the reflector (4). The outer envelope (32) is made of quartz glass that can withstand a considerable temperature load. The outer casing (32) is fixed in a two-point weld (not shown in the drawing) to the lamp post (24) facing away from the lamp holder (12), thus retaining an outflow section. The shape of the outer casing (32) relative to the lamp (2) and its axial position can be optimized for the required cooling air circulation. Since the cold airflow on the side facing the fan facing the fan is relatively strong, between the lamp (2) and the outer casing (32), the cross section of the vent (18) will follow the longitudinal axis of the lamp from the lamp. The lamp post (24), which is far from the center to the lamp holder, becomes smaller, so the flow rate of the cold air flow becomes correspondingly larger, thereby reducing the natural temperature gradient. In addition, the outer casing (32) is axially displaced along the lamp axis in the direction of the socket (12). This allows a uniform cooling effect to be achieved with a relatively low temperature gradient. In order to avoid excessive cooling of the underside of the lamp (2), an embodiment of 200903563 not depicted in the drawings is to reduce the flow of cold gas flow in the area of the bottom surface of the lamp. Providing airflow resistance in the reflector (8) (for example, closing a portion of the bottom half space between the lamp post (26) and the reflector neck (8)), and making the outer casing (32) relative to the axis of the lamp (2) The outer position has a large airflow cross section on the top surface, a small airflow cross section on the bottom surface, or a non-rotationally symmetrical shape of the outer casing (32) to reduce the cold airflow in the bottom surface region. Traffic. The reflector lamp (1) of the present invention is not limited to the above-mentioned embodiment having the outer envelope (32), but it is also possible to mount the lamp (2) without the outer envelope (32) on the reflector ( 4) Medium. In this embodiment, an object for partially closing the vent hole (18) between the lamp (2) and the reflector neck (8) may be provided on the bottom surface of the lamp post (26) to prevent the bottom surface of the lamp. Being overcooled. The invention discloses a reflector lamp (1), in particular a reflector for a data or video projector, having a lamp (2) with at least a portion of a section surrounded by a reflector (4), the reflector (4) via A reflector neck (8) is coupled to the socket (12), wherein at least one venting opening (18) is provided between the lamp (2) and the reflector neck (8). According to the invention, at least the cold air flow flowing along a portion of the lamp (2) passes through the vent (18) from the lamp holder side. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side view of a reflector lamp of the present invention. Fig. 2 is a longitudinal sectional view taken along line c-C of Fig. 1. [Main component symbol description] 1 Reflector 2 Lamp 4 Reflector 8 Reflector neck-10- 200903563 10 Housing section 12 Lamp holder 14 Body 16 Notch 18 Ventilation hole 20 Capacitor 22 Inner cavity 24, 26 Lamp post 28, 30 Current Lead 32 outer tube -11