Cooling system for a lamp and lighting system comprising the cooling system

公开(公告)号：
EP2341285A1
公开(公告)日：
2011-07-06
申请号：
EP2009171554
申请日：
2009-09-29
授权日：
-
受理局：
欧洲专利局
专利类型：
发明申请
简单法律状态：
失效
法律状态/事件：
驳回
IPC分类号：
F21V29/02 | G03B21/16 | H01J61/52
战略新兴产业分类：
-
国民经济行业分类号：
-
当前申请(专利权)人：
KONINKLIJKE PHILIPS ELECTRONICS N.V.
原始申请(专利权)人：
KONINKLIJKE PHILIPS ELECTRONICS N.V.
当前申请(专利权)人地址：
Groenewoudseweg 1,5621 BA Eindhoven,NL
工商统一社会信用代码：
-
工商登记状态：
其他
工商注册地址：
-
工商成立日期：
1891-01-01
工商企业类型：
-
发明人：
THE DESIGNATION OF THE INVENTOR HAS NOT YET BEEN FILED
代理机构：
DAMEN, DANIEL MARTIJN
代理人：
-
摘要：
The invention relates to a cooling system (100) for a lamp (200), to a lighting system (300) and to a projection system (400) comprising the cooling system. The cooling system according to the invention is configured for generating a first jet (10) of cooling fluid and for generating a second jet (20) of cooling fluid configured for colliding with the first jet of cooling fluid at a distance (d1) from the lamp to generate a combined jet (30) of cooling fluid. A ratio between a first parameter of the first jet and a second parameter of the second jet determines a direction of the combined jet for directing the combined jet to a predefined location (40) on the lamp for cooling the predefined location of the lamp. The effect of the measures according to the invention is that the ratio between the first parameter and the second parameter is used to determine a direction of the flow of combined jet comprising the combined cooling fluid.
技术问题语段：
A disadvantage of the known cooling system is that the exact location on the lamp for cooling cannot be altered.
技术功效语段：
[0012]The effect of the measures according to the invention is that the ratio between the first parameter and the second parameter is used to determine a direction of the flow of the combined jet comprising the combined cooling fluid. As such, the combined jet may be directed to the predefined location on the lamp. The first jet is arranged to collide with the second jet to form the combined jet. Each one of the first jet and the second jet comprise a mass-flow of cooling fluid which combines into a combined mass-flow of cooling fluid constituting the combined jet. To be able to create the combined jet, the first jet and second jet preferably are not to be disturbed before colliding to form the combined jet. Consequently, the collision between the first jet and second jet takes place at a distance from the part of the lamp which has to be cooled. The direction of the combined jet depends on the ratio between the first parameter being a characteristic of the first jet and the second parameter being a characteristic of the second jet. If, for example, the density of the mass-flow in the second jet is larger than the density of the mass-flow in the first jet while the remainder of the characteristics of the first jet and second jet are substantially the same, the direction of the combined jet is more towards the original direction of the second jet. If, on the other hand, the mass-flow speed in the first jet is larger than the mass-flow speed in the second jet while the remainder of the characteristics of the first jet and second jet are substantially the same, the direction of the combined jet may be closer to the original mass-flow of the first jet. Consequently, the ratio between the first parameter and the second parameter determines the direction of the mass-flow of the combined jet. Adapting the first parameter with respect to the second parameter, the direction of the mass-flow of the combined jet may be altered which enables a shift of the combined jet to cool a different location on the lamp, thus improving the flexibility of the cooling system. [0030]In an embodiment of the lighting system, the base comprising a first part for mechanical fixing the base to the lighting system and a second part for mechanical fixing the lamp to the base, wherein outer dimensions of the second part being fully integrated within outer dimensions of the first part. A known base commercially known as "fastfit" base is configured such that the second part extends from the first part. The reason for this extending second part is to ensure that the light source is located away from of the base to limit the heating of the base due to the lamp. The metal base is preferably located away from the lamp in order to prevent excessive heating of the part of lighting system that is in contact with the lamp. Furthermore, this extension is used to position the lamp at a predefined location within the lighting system, for example, at a focal point of a reflector which may be part of the lighting system. Due to the cooling system according to the invention, the extension in the base may be omitted. A first advantage is that the lamp together with the base may be more compact such that the whole lighting system may be produced more compact. This may result in, for example, smaller projection systems which are easier to handle and more convenient as portable projector. Typically the second part is too small to comprise jet-generation means of the cooling system and typically is too small to allow the first jet and second jet to be emitted from the second part. The first part typically is larger and may comprise parts of the cooling system. By fully integrating the second part within the outer dimensions of the first part, the second part does not extend from the first part which prevents the second part to form an obstacle between the first jet, second jet and the lamp. A further advantage is that the distance between the first jet and second jet and the lamp may be reduced which enhances the efficiency of the cooling by the first jet and the second jet.
权利要求：
1. A cooling system (100, 102, 104) for cooling a lamp (200), the cooling system (100, 102, 104) being configured for generating a first jet (10, 12) of cooling fluid and for generating a second jet (20, 22) of cooling fluid configured for colliding with the first jet (10, 12) of cooling fluid at a distance (d1, d2) from the lamp (200) to generate a combined jet (30, 32) of cooling fluid, a ratio between a first parameter of the first jet (10, 12) and a second parameter of the second jet (20, 22) determining a direction of the combined jet (30, 32) for directing the combined jet (30, 32) to a predefined location (40, 42) on the lamp (200) for cooling the predefined location (40, 42) of the lamp (200). 2. The cooling system (100, 102, 104) according to claim 1, wherein the cooling system (100, 102, 104) comprises control means (50) configured for adapting the first parameter and/or the second parameter to adapt the ratio between the first parameter and the second parameter for adapting the direction of the combined jet (30, 32). 3. The cooling system (100, 102, 104) according to claim 1, wherein the cooling system (100, 102, 104) comprises control means (50) configured for adapting the first parameter and/or the second parameter to adapt a combined parameter of the combined jet (30, 32) for determining a cooling efficiency of the combined jet (30, 32). 4. The cooling system (100, 102, 104) according to claim 2 or 3, wherein the control means (50) are configured for determining a position of the predefined location (40, 42) on the lamp (200), and/or wherein the control means (50) are configured for measuring a temperature of the predefined location (40, 42) on the lamp (200). 5. The cooling system (100, 102, 104) according to claim 1, wherein the cooling system (100, 102, 104) is configured for generating a third jet (60, 62) of cooling fluid configured for colliding with the first jet (10, 12) of cooling fluid and/or with the second jet (20, 22) of cooling fluid at a further distance (d2) from the lamp (200) to contribute to the combined jet (30, 32) of cooling fluid, the first jet (10, 12), second jet (20, 22) and third jet (60, 62) being non-coplanar jets of cooling fluid. 6. The cooling system (100, 102, 104) according to claim 1, wherein the first parameter of the first jet (10, 12) and/or the second parameter of the second jet (20, 22) comprise: a mass-flow density of the cooling fluid, and/or a mass-flow speed of the cooling fluid, and/or a mass-flow direction of the cooling fluid, and/or a diameter of the mass-flow of the cooling fluid constituting the jet (10, 12, 20, 22, 60, 62), and/or a shape of the cross-section of the mass-flow of the cooling fluid constituting the jet (10, 12, 20, 22, 60, 62), and/or a predefined composition of the mass-flow, and/or a temperature of the fluid medium in the mass-flow, and/or a pressure within an emitter (ION, 20N, 10T, 12T, 20T, 22T, 60T, 62T) for emitting the jet (10, 12, 20, 22, 60, 62), and/or a geometry of the emitter (ION, 20N, 10T, 12T, 20T, 22T, 60T, 62T), and/or an angle (α) between the first jet (10, 12) and the second jet (20, 22). 7. The cooling system (100, 102, 104) according to claim 1, wherein the first fluid of the first jet (10, 12) and/or the second fluid of the second jet (20, 22) comprise: a predefined gas or gas mixture, a gas comprising a predefined amount of liquid, ambient air, and/or moisturized air having a predefined humidity. 8. The cooling system (100, 102, 104) according to claim 1, wherein an angle (α) between the first jet (10, 12) of cooling fluid and the second jet (20, 22) of cooling fluid is within a range between 2 and 40 degrees, and/or within a range between 5 and 30 degrees, and/or within a range between 10 and 20 degrees. 9. The cooling system (100, 102, 104) according to claim 1, wherein the cooling system (100, 102, 104) comprises a first emitter (10N, 20N, 10T, 12T, 20T, 22T, 60T, 62T) for emitting the first jet (10, 12), the first emitter (10N, 20N, 10T, 12T, 20T, 22T, 60T, 62T) comprising an actuator for altering a dimension of the first emitter (ION, 20N, 10T, 12T, 20T, 22T, 60T, 62T) and/or for altering a shape of the first emitter (ION, 20N, 10T, 12T, 20T, 22T, 60T, 62T) for determining the first parameter of the first jet (10, 12). 10. A lighting system (300, 302, 304, 306) comprising a lamp (200) and at least one cooling system as claimed in claim 1. 11. The lighting system (300, 302, 304, 306) according to claim 10, wherein the distance (d1) from the lamp (200) at which the first jet (10, 12) is configured to collide with the second jet (20, 22) is equal or larger than 50% of a width (w) of the lamp (200) at the predefined location (40, 42) of the lamp (200), and/or equal or larger than 100% of the width of the lamp at the predefined location of the lamp, and/or equal or larger than 200% of the width of the lamp at the predefined location of the lamp, the width (w) of the lamp (200) being defined in a direction perpendicular to a symmetry-axis (S) of the lamp (200). 12. The lighting system (300, 302, 304, 306) according to claim 10, wherein first jet-generation means (80) are integrated in a base (210) of the lamp (200) for generating the first jet (10, 12) of cooling fluid, the base (210) of the lamp (200) providing mechanical fixation of the lamp (200) in the lighting system (300, 302, 304, 306) and providing electrical connection points (220) for providing power to the lamp (200). 13. The lighting system (300, 302, 304, 306) according to claim 12, wherein the first jet-generation means (80) comprise a first cavity (90) comprising a movable diaphragm (94) for generating the first jet (10, 12), the movable diaphragm (94) being configured for forcing the cooling fluid of the first jet through a first emitter (10N, 20N, 10T, 12T, 20T, 22T, 60T, 62T) for emitting the first jet (10, 12) when the movable diaphragm (94) is moved into the first cavity (90), the cooling system (100, 102, 104) further comprises a diaphragm-driver (98) for moving the movable diaphragm (94) to generate the first jet (10, 12). 14. The lighting system (300, 302, 304, 306) according to claim 12, the base (210) comprising a first part (212) for mechanical fixing the base (210) to the lighting system (300, 302, 304, 306) and a second part (214) for mechanical fixing the lamp (200) to the base (210), wherein outer dimensions of the second part (214) being fully integrated within outer dimensions of the first part (212). 15. Projection system (400, 402) comprising the cooling system (100, 102, 104) as claimed in claim 1 and/or comprising the lighting system (300, 302, 304, 306) as claimed in claim 10.
技术领域：
-
背景技术：
-
发明内容：
-
具体实施方式：
-
返回