| 摘要 |
A small hand-held tubular shaped flashlight utilizes a liquid to absorb heat energy from a high intensity light source such as an LED base member such as a heat sink, capsule or other light source, and assists in absorbance and transport of heat energy. The liquid preferably transfers the heat throughout the long cylindrical handle, and utilizes the surface area of the long flashlight body for even heat rejection without localized hot spots. In the alternative, a liquid can store the heat through melting/crystallization, where the liquid takes the form of a solid with low melting point (such as a wax) that melts during use but re-solidifies or crystallizes during periods of non-use. The use of a liquid jacket around these batteries also makes the flashlight attractive for low temperature service where the heat from the LED can be used to warm the batteries.
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