The present application is based on, and claims priority from, Taiwan Application Serial Number 93128619, filed Sep. 21, 2004, the disclosure of which is hereby incorporated by reference herein in its entirety.
1. Field of Invention
The invention relates to a cooling device and, in particular, to a cooling air gathering plate for a projector lamp.
2. Related Art
The cooling means of a conventional projector lamp is to use an air sending device to blow cool air toward the lamp reflector, the lampwick and any high-temperature position in the lamp, thereby taking away the heat of the lamp. As shown in
An objective of the invention is to provide a cooling air gathering plate for a projector lamp to collect and guide cooling air inside the lamp reflector to high-temperature points on the projector lamp, effectively using the cooling air to enhance the cooling effect. Since the cooling air is fully utilized, the system noise can be reduced.
To achieve the above objective, the cooling air gathering plate has a notch. The center line of the cooling air gathering plate matches with an axis of the lamp. From the front of the lamp reflector, the gathering plate and the flowing direction of the cooling air subtend an angle. The notch is formed on the gathering plate to accommodate high-temperature points, such as the lampwick, the welding point, and the end point, of the projector lamp. The gathering plate can be fixed on the lamp reflector, the projector lamp, or a holder for fixing the gathering plate to guide the cooling air passing through the high temperature position of the lamp.
These and other features, aspects and advantages of the invention will become apparent by reference to the following description and accompanying drawings which are given by way of illustration only, and thus are not limitative of the invention, and wherein:
The present invention will be apparent from the following detailed description, which proceeds with reference to the accompanying drawings, wherein the same references relate to the same elements.
As shown in
The notch 110 is on the gathering plate 100 to accommodate the lampwick 510, the welding point 520, and the end point 530 of the projector lamp 500.
As shown in
From the top view of
All kinds of variations can be done within the scope of the invention. For example, the shape of the gathering plate 100 is not restricted to the one in
From the preferred embodiment described above, we know the invention has the following advantages:
The gathering plate guides cooling air toward the notch, which accommodates the lampwick, the welding point, and the end point of the projector lamp, taking away heat thereon. Since most of the cooling air flows by high-temperature points, its cooling effect is greatly enhanced.
The gathering plate is a thin sheet and rests on the plane of the axis of the lamp. Therefore, it has little effect on the brightness of the light source.
The cooling effect can be enhanced without increasing the volume of the system or the rotational speed of the air sending device.
While the invention has been described by way of example and in terms of the preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. To the contrary, it is intended to cover various modifications and similar arrangements as would be apparent to those skilled in the art. Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.
Number | Date | Country | Kind |
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93128619 A | Sep 2004 | TW | national |
Number | Name | Date | Kind |
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1950918 | Forbes | Mar 1934 | A |
5174646 | Siminovitch et al. | Dec 1992 | A |
20040202005 | Moisel | Oct 2004 | A1 |
Number | Date | Country | |
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20060061995 A1 | Mar 2006 | US |